RECOMBINANT VIRAL VECTOR FOR GENE TRANSFER INTO LYMPHOID CELLS

Abstract

A recombinant herpesvirus, a method for producing the recombinant herpesvirus, and a pharmaceutical composition comprising the recombinant herpesvirus, are provided with a method for producing a recombinant herpesvirus using a BAC vector sequence. In addition, a vector comprising a herpesvirus genomic gene and a BAC vector sequence, a cell comprising the vector, and a nucleic acid cassette comprising a fragment, which is capable of homologous recombination with a herpesvirus genome, and a BAC vector sequence, are provided.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Divisional application of application Ser. No. 12/794,193, filed 4 Jun. 2010, which is a Continuation application of application Ser. No. 12/437,644, filed 8 May 2009, which is a Continuation application of application Ser. No. 10/843,877, filed 12 May 2004, which claims benefit of priority under 35 U.S.C. §119(e) to Japanese Patent Application No. 2004-137953, filed 6 May 2004, the contents of each of which are herein incorporated by reference in their entirety.

REFERENCE TO SEQUENCE LISTING, TABLE OR COMPUTER PROGRAM

A Sequence Listing is being submitted electronically via EFS in the form of a text file, created 1 Dec. 2010, and named “591508027US01seq2010.txt” (3,622,656 bytes), the contents of which are incorporated herein by reference in their entirety.

FIELD OF THE INVENTION

The present invention relates to a recombinant viral vector for introducing a desired gene into lymphoid cells, particularly a recombinant human herpes viral vector prepared using BAC (E. coli artificial chromosome), and a pharmaceutical composition comprising such a viral vector. Further, the present invention relates to a vector comprising a human herpes viral genomic gene and a BAC vector sequence, and a cell containing such a vector. Further, the present invention relates to a method for producing a recombinant human herpesvirus. Further, the present invention relates to a nucleic acid cassette comprising a fragment capable of homologous recombination with a herpesvirus genome, and a BAC vector sequence.

DESCRIPTION OF THE RELATED ART

There has been a demand for the establishment of a technique for gene therapy with lymphoid cells in order to treat various diseases involving lymphoid cells, e.g., human immunodeficiency virus (HIV) infection. However, no satisfactory vector system for introducing a desired gene into lymphoid cells has been developed.

Herpesvirus (HHV) is a generic term referring to viruses of the family Herpesviridae. Both human herpesvirus 6 and 7 (HHV-6 and HHV-7) are double-stranded DNA viruses of the subfamily β Herpesviridae of the family Herpesviridae, which are responsible for exanthem subitum. (Yamanishi K. et al., “Identification of human herpesvirus 6 as a causal agent for exanthem subitum”, Lancet 1988; i: 1065-1067 and Tanaka K. et al., “Human herpesvirus 7: Another causal agent for roseola (exanthem subitum)”, J. Pediatr., 1994; 125: 1-5). HHV-6 includes two strains, HHV-6A and HHV-6B. HHV-6 causes a viral infectious disease which often occurs during infancy and induces sudden high fever and exanthema before and after the reduction of fever. The prognosis of infected patients is generally good. HHV-7 infection tends to occur later than HHV-6 infection (Tanaka K. et al., “Seroepidemiological study of human herpesvirus-6 and -7 in children of different ages and detection of these two viruses in throat swabs by polymerase chain reaction”, Journal of Medical Virology, 1996; 48: 88-94). Therefore, exanthem subitum caused by HHV-7 is clinically experienced as secondary exanthem subitum. A seroepidemiological study of HHV-6 and HHV-7 demonstrated that most children become positive for antibodies to HHV-6 and HHV-7 before the age of two or three. It has been reported that the inapparent infection rate is 20 to 40%.

HHV-7 is a herpesvirus which was newly found by Frankel et al. in 1990 when a cytopathic effect was observed during culturing of CD4⁺ T lymphoid cells of a healthy person's peripheral blood (Frankel N. et al., “Isolation of a new herpesvirus from human CD4⁺ T cells”, ProNAS USA, 87: 749-752, ProNAS USA, 87: 749-752, 1990). The virus was isolated from mononuclear cells of human peripheral blood. Both HHV-6 and -7 are CD4⁺ T lymphoid cell tropic viruses. HHV-7 infects T cells via a receptor CD4 on the cell surface. HHV-7 can grow only in human T lymphoid cells. Therefore, HHV-7 is a virus which can be used for gene modification of human T lymphoid cells.

The HHV-7 genome is double-stranded DNA of about 145 kbp. The whole base sequence has been determined by Nicholas et al. It is known that at least 101 genes are present on the genome (John N. et al., Journal of Virology, September 1996, 5975 to 5989).

However, it is not currently possible to introduce a gene into T lymphoid cells using HHV-7. This is because no technique for preparing a herpesvirus capable of infecting only T lymphoid cells, i.e., recombinant HHV-7 virus, has been developed, and no technique for efficiently introducing a vector into T lymphoid cells has been established. Therefore, there is a demand for a technique for introducing a desired gene into T lymphoid cells using HHV-7 or HHV-6 recombinant virus.

In addition, it is believed that these viruses, particularly HHV-7 virus, have no adverse effect on healthy individuals. If a gene containing an antigenic determinant of various viruses (e.g., mumps) is incorporated into the viral genome of HHV-7 and is expressed by infected cells, HHV-7 is considered to be useful as a vaccine. However, when HHV-7 is used as a vaccine, in terms of quality control and quality assurance, it is preferable that the genotype of the virus is not changed as the virus is subcultured. Therefore, when the recombinant virus is used as a vaccine, it is necessary to stably supply a virus derived from a single recombinant genotype virus. For this purpose, a technique for producing a HHV-7 recombinant virus having a single genotype has been desired.

In addition, the mutual relationship between the HIV infection of a T lymphoid cell strain SupT1 cell and a T lymphoid cell tropic human herpesvirus (HHV-6A (U1102 strain), HHV-7 (MRK, MSO strains)) has been studied. The HHV-7 strain, which binds a receptor CD4 of cells, exhibits satisfactory growth in SupT1 cells. However, infection could not been established for SupT1/HIV cells. In contrast, it has been recognized that HHV-6A strain infects SupT1 cells with HIV-persistent infection (SupT1/HIV) and exhibits clear CPE (Masao Yamada et al., “HIV Jizokukansen SupT1 Saibo heno HHV-6 oyobi—7 Choufukukannsen no Kokoromi (Attempt for HHV-6 and -7 Superinfection to HIV Persistent Infection Sup-T1 Cell)”, Title No. 122, Titles and Abstracts of the 7th Annual Meeting of the Japanese Society for AIDS Research, 1993, Tokyo).

An object of the present invention is to provide a recombinant viral vector for introducing a desired gene into lymphoid cells, particularly a recombinant human herpes viral vector prepared using a BAC (E. coli artificial chromosome), and a pharmaceutical composition comprising such a viral vector. Another object of the present invention is to provide a vector comprising a human herpes viral genomic gene and a BAC vector sequence, and a cell containing such a vector. Still another object of the present invention is to provide a method for producing a recombinant human herpesvirus. Even still another object of the present invention is to provide a nucleic acid cassette comprising a fragment capable of homologous recombination with a herpesvirus genome, and a BAC vector sequence.

To achieve this, the present invention provides recombinant HHV-7, and a production method thereof, e.g., a method for producing recombinant HHV-7 or HHV-6 from a single virus strain using a BAC (E. coli artificial chromosome).

An ideal HIV vaccine can provide complete and long-lasting protection for all types of HIV. On the other hand, conventional inactivated HIV vaccines have advantages and disadvantages, some of which will be described below.

A method for producing a recombinant vaccine employs common techniques. However, since it is difficult to maintain immunogenicity (since immunogenicity is low), high antigenic load and frequent inoculation of an adjuvant are required. Safety is of the greatest concern. A subunit vaccine containing either a native or recombinant subunit may be safe. However, such a subunit vaccine is limited because of the selection of a subunit and the low immunogenicity.

The present invention can realize an effect which cannot be obtained by conventional vaccines. This effect is a function of prevention and treatment before and after HIV infection. This is achieved by the recombinant herpesvirus itself utilizing the same mechanism that HIV uses to bind to its target immune cell (CD4⁺ T cell).

Conventionally, it is difficult to produce a vaccine for HIV. The reason will be described below. HIV is integrated with the infected cell. In addition, HIV attacks immune cells themselves which are usually activated by a vaccine. When HIV infects a cell, gp120 binds to CD4. CD4 is a receptor present on the surface of an immune cell (T cell) which HIV infects. CD4 can be said to be an entrance to the cell. The growth of HIV can be suppressed by HHV-7 binding to the CD4⁺ cell surface or HHV-6 entering the cell.

By utilizing the above-described principle, the present invention provides a pharmaceutical composition for the prevention of HIV infection, and a pharmaceutical composition for the treatment of HIV infection.

SUMMARY OF THE INVENTION

The present inventors developed a method for producing a recombinant herpesvirus using a BAC vector sequence to complete the present invention

Therefore, the present invention provides the following.

1. A recombinant herpesvirus for gene transfer into lymphoid cells.

2. The recombinant herpesvirus of item 1, comprising BAC vector sequence.

3. The recombinant herpesvirus of item 2, wherein at least part of the BAC vector sequence is inserted into a non-essential region of a herpesvirus genome.

4. The recombinant herpesvirus of item 3, wherein the non-essential region is selected from the group consisting of the following regions of HHV-7:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

5. The recombinant herpesvirus of item 4, wherein the non-essential region is the region flanking the ORF of gene U24, or the region flanking the ORF of gene U24a.

6. The recombinant herpesvirus of item 3, wherein the non-essential region is selected from the group consisting of the following regions of HHV-6A or HHV-6B:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORE of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

7. The recombinant herpesvirus of item 6, wherein the non-essential region is the region flanking the ORF of gene U5 of HHV-6, or the region flanking the ORF of gene U8 of HHV-6.

8. The recombinant herpesvirus of item 3, wherein the BAC vector sequence comprises a recombinant protein dependent recombinant sequence.

9. The recombinant herpesvirus of item 3, wherein the BAC vector sequence comprises a selectable marker.

10. The recombinant herpesvirus of item 9, wherein the selectable marker is drug selectable marker.

11. The recombinant herpesvirus of item 9, wherein the selectable marker is a gene encoding green fluorescent protein.

12. The recombinant herpesvirus of item 3, wherein the herpesvirus genome is derived from a wild type strain.

13. The recombinant herpesvirus of item 3, wherein the herpesvirus genome is derived from a mutant type strain.

14. The recombinant herpesvirus of item 3, wherein the herpesvirus genome is derived from HHV-7 KHR strain.

15. The recombinant herpesvirus of item 3, wherein the herpesvirus genome is derived from HHV-6A U1102 strain or HHV-6B HST strain.

16. The recombinant herpesvirus of item 3, wherein the BAC vector sequence comprises the sequence set forth in SEQ ID NO.: 401.

17. A pharmaceutical composition comprising the virus of item 1.

18. The pharmaceutical composition of item 17, wherein the composition is in the form of vaccine.

19. A vector comprising a human herpesvirus essential gene and a BAC vector sequence.

20. The vector of item 19, wherein a mammalian cell produces a recombinant herpesvirus when the vector is introduced into the mammalian cell.

21. The vector of item 20, wherein a portion where a sequence derived from the herpesvirus genome is linked to the BAC vector sequence is within a non-essential region of the herpesvirus genome.

22. The vector of item 21, wherein the non-essential region is selected from the group consisting of the following regions of HHV-7:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U517, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORE of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORE of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

23. The vector of item 22, wherein the non-essential region is the region flanking the ORF of gene U24 of HHV-7, or the region flanking the ORF of gene U24a of HHV-7.

24. The vector of item 21, wherein the non-essential region is selected from the group consisting of the following regions of HHV-6:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

25. The vector of item 24, wherein the non-essential region is the region flanking the ORF of gene U5 of HHV-6, or the region flanking the ORF of gene U8 of HHV-6.

26. The vector of item 19, wherein the BAC vector sequence comprises a recombinant protein dependent recombinant sequence.

27. The vector of item 21, wherein the BAC vector sequence comprises a selectable marker.

28. The vector of item 27, wherein the selectable marker is a drug selectable marker.

29. The vector of item 27, wherein the selectable marker is a gene encoding green fluorescent protein.

30. The vector of item 21, wherein the herpesvirus genome is derived from a wild type strain.

31. The vector of item 21, wherein the herpesvirus genome is derived from a mutant type strain.

32. The vector of item 21, wherein the herpesvirus genome is derived from HHV-7 KHR strain.

33. The vector of item 21, wherein the herpesvirus genome is derived from HHV-6A U1102 strain or HHV-6B HST strain.

34. The vector of item 21, wherein the BAC vector sequence comprises the sequence set forth in SEQ ID NO.: 401.

35. A cell comprising the vector of item 21.

36. The cell of item 35, wherein the cell is a bacterial cell.

37. The bacterial cell of item 36, wherein the bacterial cell is E. coli.

38. The cell of item 35, wherein the cell is a mammalian cell.

39. The mammalian cell of item 38, wherein the mammalian cell is derived from human.

40. A virus produced by the mammalian cell of item 38.

41. A pharmaceutical composition comprising the virus of item 40.

42. The pharmaceutical composition of item 41, wherein the composition is in the form of vaccine.

43. A method to produce a recombinant herpesvirus, comprising:

introducing a vector comprising a herpesvirus genome essential gene and BAC vector sequence into a mammalian host cell; and

culturing the mammalian host cell to produce a recombinant herpesvirus.

44. The method of item 43, wherein the mammalian host cell is derived from human.

45. The method of item 43, wherein the BAC vector sequence comprises at least two recombinant protein dependent recombinant sequences.

46. The method of item 45, further comprising a step of recombination between the two recombinant protein dependent recombinant sequences.

47. The method of item 43, wherein a portion where a sequence derived from the herpesvirus genome is linked to the BAC vector sequence is within a non-essential region of the herpesvirus genome.

48. The method of item 47, wherein the non-essential region is selected from the group consisting of the following regions of HHV-7:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

49. The method of item 48, wherein the non-essential region is the region flanking the ORF of gene U24 of HHV-7, or the region flanking the ORF of gene U24a of HHV-7.

50. The method of item 47, wherein the non-essential region is selected from the group consisting of the following regions of HHV-6:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORE of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORE of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

51. The method of item 50, wherein the non-essential region is the region flanking the ORF of gene U5 of HHV-6, or the region flanking the ORF of gene U8 of HHV-6.

52. The method of item 43, wherein the BAC vector sequence comprises a recombinant protein dependent recombinant sequence.

53. The method of item 43, wherein the BAC vector sequence comprises a selectable marker.

54. The method of item 53, wherein the selectable marker is a drug selectable marker.

55. The method of item 53, wherein the selectable marker is a gene encoding green fluorescent protein.

56. The method of item 43, wherein the herpesvirus genome is derived from a wild type strain.

57. The method of item 43, wherein the herpesvirus genome is derived from a mutant type strain.

58. The method of item 43, wherein the herpesvirus genome is derived from HHV-7 KHR strain.

59. The method of item 43, wherein the herpesvirus genome is derived from HHV-6A U1102 strain or HHV-6B HST strain.

60. The method of item 43, wherein the BAC vector sequence comprises the sequence set forth in SEQ ID NO.: 401.

61. A virus produced by the method of item 43.

62. A pharmaceutical composition comprising the virus of item 61.

63. The pharmaceutical composition of item 62, wherein the composition is in the form of vaccine.

64. A method to introduce a mutation into the vector of item 19, comprising:

introducing the vector into a bacterial host cell;

introducing a plasmid vector comprising a fragment consisting of a portion of herpesvirus genome into the bacterial host cell, wherein the fragment has at least one mutation;

culturing the bacterial host cell;

isolating a vector having BAC sequence from the cultured bacterial host cell.

65. A method to introduce a mutation into the vector of item 19, comprising:

introducing the vector into a bacterial host cell;

introducing a first plasmid vector comprising a first fragment consisting of a portion of herpesvirus genome into the bacterial host cell, wherein the first fragment has at least one mutation;

introducing a second plasmid vector comprising a second fragment consisting of a portion of herpesvirus genome into the bacterial host cell, wherein the second fragment has at least one mutation, and the first fragment is different from the second fragment;

culturing the bacterial host cell;

isolating a vector having BAC sequence from the cultured bacterial host cell.

66. A nucleic acid cassette comprising a first fragment which can recombine with herpesvirus genome in a bacterial cell, BAC vector sequence, and a second fragment which can recombine with herpesvirus genome in a bacterial cell,

wherein the both ends of the BAC sequence are linked to the first and the second fragment, respectively.

67. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 1 kb.

68. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 1.5 kb.

69. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 2 kb.

70. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 80% identical with a herpesvirus genome sequence.

71. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 85% identical with a herpesvirus genome sequence.

72. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 90% identical with a herpesvirus genome sequence.

73. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are at least 95% identical with a herpesvirus genome sequence.

74. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment are independently selected from the group consisting of the following regions of herpesvirus HHV-7 genome:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

75. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 80% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-7 genome:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORE of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORE of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

76. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 85% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-7 genome:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORE of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

77. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 90% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-7 genome:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORE of gene U4, the region in the ORF of gene U517, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORE of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORE of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

78. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 95% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-7 genome:

the region in the ORF of gene H1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene H2, the region in the ORF of gene DR6, the region in the ORF of gene DR7, the region in the ORF of gene H3, the region in the ORF of gene H4, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5/7, the region in the ORF of gene U8, the region in the ORF of gene U10, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17Ex, the region in the ORF of gene U17, the region in the ORF of gene U17a, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U24a, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55A, the region in the ORF of gene U55B, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene H5, the region in the ORF of gene U79, the region in the ORF of gene H6, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U91, the region in the ORF of gene H7, the region in the ORF of gene U95, the region in the ORF of gene H8, the region flanking the ORF of gene H1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene H2, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DR7, the region flanking the ORF of gene H3, the region flanking the ORF of gene H4, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5/7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17Ex, the region flanking the ORF of gene U17, the region flanking the ORF of gene U17a, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U24a, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55A, the region flanking the ORF of gene U55B, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene H5, the region flanking the ORF of gene U79, the region flanking the ORF of gene H6, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U91, the region flanking the ORF of gene H7, the region flanking the ORF of gene U95, and the region flanking the ORF of gene H8.

79. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment are independently selected from the group consisting of the following regions of herpesvirus HHV-6 genome:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

80. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 80% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-6 genome:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

81. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 85% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-6 genome:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORE of gene U95, and the region flanking the ORF of gene U96.

82. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 90% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-6 genome:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORE of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORE of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

83. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment is independently at least 95% identical with the region selected from the group consisting of the following regions of herpesvirus HHV-6 genome:

the region in the ORF of gene LT1, the region in the ORF of gene DR1, the region in the ORF of gene DR2, the region in the ORF of gene DR3, the region in the ORF of gene DR4, the region in the ORF of gene DR5, the region in the ORF of gene DR6, the region in the ORF of gene DRHN1, the region in the ORF of gene DR7, the region in the ORF of gene DRHN2, the region in the ORF of gene DR8, the region in the ORF of gene LJ1, the region in the ORF of gene U1, the region in the ORF of gene U2, the region in the ORF of gene U3, the region in the ORF of gene U4, the region in the ORF of gene U5, the region in the ORF of gene U6, the region in the ORF of gene U7, the region in the ORF of gene U8, the region in the ORF of gene U9, the region in the ORF of gene U10, the region in the ORF of gene U12EX, the region in the ORF of gene U12, the region in the ORF of gene U13, the region in the ORF of gene U15, the region in the ORF of gene U16, the region in the ORF of gene U17, the region in the ORF of gene U18, the region in the ORF of gene U19, the region in the ORF of gene U20, the region in the ORF of gene U21, the region in the ORF of gene U22, the region in the ORF of gene U23, the region in the ORF of gene U24, the region in the ORF of gene U25, the region in the ORF of gene U26, the region in the ORF of gene U28, the region in the ORF of gene U32, the region in the ORF of gene U33, the region in the ORF of gene U34, the region in the ORF of gene U35, the region in the ORF of gene U36, the region in the ORF of gene U37, the region in the ORF of gene U40, the region in the ORF of gene U42, the region in the ORF of gene U44, the region in the ORF of gene U45, the region in the ORF of gene U46, the region in the ORF of gene U47, the region in the ORF of gene U49, the region in the ORF of gene U50, the region in the ORF of gene U51, the region in the ORF of gene U52, the region in the ORF of gene U55, the region in the ORF of gene U58, the region in the ORF of gene U59, the region in the ORF of gene U61, the region in the ORF of gene U62, the region in the ORF of gene U63, the region in the ORF of gene U64, the region in the ORF of gene U65, the region in the ORF of gene U67, the region in the ORF of gene U68, the region in the ORF of gene U69, the region in the ORF of gene U70, the region in the ORF of gene U71, the region in the ORF of gene U75, the region in the ORF of gene U76, the region in the ORF of gene U78, the region in the ORF of gene U79, the region in the ORF of gene U80, the region in the ORF of gene U81, the region in the ORF of gene U83, the region in the ORF of gene U84, the region in the ORF of gene U85, the region in the ORF of gene U88, the region in the ORF of gene U91, the region in the ORF of gene U92, the region in the ORF of gene U93, the region in the ORF of gene HN2, the region in the ORF of gene U94, the region in the ORF of gene U95, the region in the ORF of gene U96, the region flanking the ORF of gene LT1, the region flanking the ORF of gene DR1, the region flanking the ORF of gene DR2, the region flanking the ORF of gene DR3, the region flanking the ORF of gene DR4, the region flanking the ORF of gene DR5, the region flanking the ORF of gene DR6, the region flanking the ORF of gene DRHN1, the region flanking the ORF of gene DR7, the region flanking the ORF of gene DRHN2, the region flanking the ORF of gene DR8, the region flanking the ORF of gene LJ1, the region flanking the ORF of gene U1, the region flanking the ORF of gene U2, the region flanking the ORF of gene U3, the region flanking the ORF of gene U4, the region flanking the ORF of gene U5, the region flanking the ORF of gene U6, the region flanking the ORF of gene U7, the region flanking the ORF of gene U8, the region flanking the ORF of gene U9, the region flanking the ORF of gene U10, the region flanking the ORF of gene U12EX, the region flanking the ORF of gene U12, the region flanking the ORF of gene U13, the region flanking the ORF of gene U15, the region flanking the ORF of gene U16, the region flanking the ORF of gene U17, the region flanking the ORF of gene U18, the region flanking the ORF of gene U19, the region flanking the ORF of gene U20, the region flanking the ORF of gene U21, the region flanking the ORF of gene U22, the region flanking the ORF of gene U23, the region flanking the ORF of gene U24, the region flanking the ORF of gene U25, the region flanking the ORF of gene U26, the region flanking the ORF of gene U28, the region flanking the ORF of gene U32, the region flanking the ORF of gene U33, the region flanking the ORF of gene U34, the region flanking the ORF of gene U35, the region flanking the ORF of gene U36, the region flanking the ORF of gene U37, the region flanking the ORF of gene U40, the region flanking the ORF of gene U42, the region flanking the ORF of gene U44, the region flanking the ORF of gene U45, the region flanking the ORF of gene U46, the region flanking the ORF of gene U47, the region flanking the ORF of gene U49, the region flanking the ORF of gene U50, the region flanking the ORF of gene U51, the region flanking the ORF of gene U52, the region flanking the ORF of gene U55, the region flanking the ORF of gene U58, the region flanking the ORF of gene U59, the region flanking the ORF of gene U61, the region flanking the ORF of gene U62, the region flanking the ORF of gene U63, the region flanking the ORF of gene U64, the region flanking the ORF of gene U65, the region flanking the ORF of gene U67, the region flanking the ORF of gene U68, the region flanking the ORF of gene U69, the region flanking the ORF of gene U70, the region flanking the ORF of gene U71, the region flanking the ORF of gene U75, the region flanking the ORF of gene U76, the region flanking the ORF of gene U78, the region flanking the ORF of gene U79, the region flanking the ORF of gene U80, the region flanking the ORF of gene U81, the region flanking the ORF of gene U83, the region flanking the ORF of gene U84, the region flanking the ORF of gene U85, the region flanking the ORF of gene U88, the region flanking the ORF of gene U91, the region flanking the ORF of gene U92, the region flanking the ORF of gene U93, the region flanking the ORF of gene HN2, the region flanking the ORF of gene U94, the region flanking the ORF of gene U95, and the region flanking the ORF of gene U96.

84. The nucleic acid cassette of item 66, wherein the first fragment and the second fragment are derived from different regions.

85. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment are independently from the region flanking the ORF of gene U24 of HHV-7, or the region flanking the ORF of gene U24a of HHV-7.

86. The nucleic acid cassette of item 66, wherein each of the first fragment and the second fragment are independently from the region flanking the ORF of gene U5 of HHV-6, or the region flanking the ORF of gene U8 of HHV-6.

87. The nucleic acid cassette of item 66, wherein the BAC vector sequence comprises a recombinant protein dependent recombinant sequence.

88. The nucleic acid cassette of item 66, wherein the BAC vector sequence comprises a selectable marker.

89. The nucleic acid cassette of item 88, wherein the selectable marker is drug selectable marker.

90. The nucleic acid cassette of item 88, wherein the selectable marker is a gene encoding green fluorescent protein.

91. The nucleic acid cassette of item 66, wherein the herpesvirus genome is derived from a wild type strain.

92. The nucleic acid cassette of item 66, wherein the herpesvirus genome is derived from a mutant type strain.

93. The nucleic acid cassette of item 66, wherein the herpesvirus genome is derived from HHV-7 KHR strain.

94. The nucleic acid cassette of item 66, wherein the herpesvirus genome is derived from HHV-6A U1102 strain or HHV-6B HST strain.

95. The nucleic acid cassette of item 66, wherein the BAC vector sequence comprises the sequence set forth in SEQ ID NO.: 401.

96. The nucleic acid cassette of item 66, having a nucleic acid sequence set forth in SEQ ID NO.: 1.

97. A pharmaceutical composition for prevention, treatment, or prognosis of HIV, comprising the recombinant herpesvirus of item 4.

98. A pharmaceutical composition for prevention of HIV, comprising the recombinant herpesvirus of item 4.

99. A pharmaceutical composition for prevention, treatment, or prognosis of HIV, comprising the recombinant herpesvirus of item 6.

100. A pharmaceutical composition for prevention of HIV, comprising the recombinant herpesvirus of item 6.

The present invention provides a recombinant herpesvirus, and a production method thereof. For example, the present invention provides a method for producing a recombinant herpesvirus from a single viral strain using a BAC (E. coli artificial chromosome), and a recombinant herpesvirus produced by the method. Further, the present invention provides a pharmaceutical composition comprising a recombinant herpesvirus.

Further, the present invention provides a vector comprising a herpes viral genomic gene and a BAC vector sequence, and a cell containing such a vector, and a nucleic acid cassette comprising a fragment capable of homologous recombination with a herpesvirus genome, and a BAC vector sequence.

Further, HHV-7 is known to have no adverse effect on healthy persons. Therefore, it is possible to select a protein, which is known to function as a vaccine, among various viral proteins, and incorporate it into recombinant HHV-7 in a manner such that the protein can be expressed. Thereby, a virus vaccine can be produced.

Further, a pharmaceutical composition for the prevention, treatment, and/or prognosis of HIV infection is provided, which comprises the recombinant HHV-7 and HHV-6 of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram showing the insertion of a BAC vector into the HHV-7 genome.

FIG. 2 shows the expression of GFP introduced into host cells using the recombinant HHV-7 of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, the present invention will be described. It should be understood throughout the present specification that expression of a singular form includes the concept of their plurality unless otherwise mentioned. It should be also understood that the terms as used herein have definitions typically used in the art unless otherwise mentioned. Thus, unless otherwise defined, all scientific and technical terms have the same meanings as those generally used by those skilled in the art to which the present invention pertain. If there is contradiction, the present specification (including the definition) precedes.

DEFINITION OF TERMS

The definitions of terms used herein are described below.

As used herein, the term “herpesvirus” includes all of HHV-6A, HHV-6B, and HHV-7, and both their wild-types and recombinant types unless otherwise mentioned. As used herein, the term “HHV-6” includes HHV-6A and HHV-6B, and both their wild-types and recombinant types unless otherwise mentioned.

As used herein, the term “essential gene” in relation to herpesvirus refers to a gene which is essential for the growth of the herpesvirus. Also, the term “non-essential gene” in relation to herpesvirus refers to a gene which is not essential for the growth of the herpesvirus, and in the absence of which the herpesvirus can grow.

(Human Herpesvirus 7; HHV-7)

Examples of non-essential genes of human herpesvirus 7 (HHV-7) include, but are not limited to: gene H1, gene DR1, gene DR2, gene H2, gene DR6, gene DR7, gene H3, gene H4, gene U2, gene U3, gene U4, gene U5/7, gene U8, gene U10, gene U12, gene U13, gene U15, gene U16, gene U17Ex, gene U17, gene U17a, gene U18, gene U19, gene U20, gene U21, gene U23, gene U24, gene U24a, gene U25, gene U26, gene U28, gene U32, gene U33, gene U34, gene U35, gene U36, gene U37, gene U40, gene U42, gene U44, gene U45, gene U46, gene U47, gene U49, gene U50, gene U51, gene U52, gene U55A, gene U55B, gene U58, gene U59, gene U62, gene U63, gene U64, gene U65, gene U67, gene U68, gene U69, gene U70, gene U71, gene U75, gene U76, gene H5, gene U79, gene H6, gene U80, gene U81, gene U84, gene U85, gene U91, gene H7, gene U95, and gene H8.

When a gene in a viral genome is an essential gene, the virus cannot grow in the absence of the gene. Therefore, by deleting an arbitrary gene in a viral genome and detecting the growth of the virus, it is possible to determine whether the gene is an essential gene or a non-essential gene.

A region within the ORF of the above-described non-essential gene and/or a region flanking the ORF, can be used as a target for inserting a BAC vector. Examples of such a preferable target include, but are not limited to, a region within or flanking the ORF of gene U24, and a region within or flanking the ORF of gene U24a. A region flanking the ORF of gene U24 and a region flanking the ORF of gene U24a are more preferable.

As used herein, the term “wild strain” in relation to herpesvirus refers to a herpesvirus strain which is not artificially modified and is isolated from the nature. An example of a wild strain includes, but is not limited to, strain JI. The nucleic acid sequence of strain JI is set forth in SEQ ID NO.: 1. The reading frame direction, the site on the genome, and the number of amino acid residues of a coded polypeptide of each ORF of strain JI are described below.

ORF	Reading frame	Site on	Number of amino
Name	direction	genome	acid residues
H1	5′→3′ direction	33 to 542	amino acid 1-170
DR1	5′→3′ direction	368 to 826	amino acid 1-153
DR2	5′→3′ direction	898 to 2100	amino acid 1-401
H2	5′→3′ direction	2267 to 2506	amino acid 1-80
DR6	5′→3′ direction	2562 to 3050	amino acid 1-163
DR7	5′→3′ direction	3122 to 3910	amino acid 1-263
H3	3′→5′ direction	3976 to 4224	amino acid 1-83
H4	3′→5′ direction	4449 to 4745	amino acid 1-99
U2	3′→5′ direction	6338 to 7417	amino acid 1-360
U3	3′→5′ direction	7578 to 8732	amino acid 1-385
U4	3′→5′ direction	8754 to 10382	amino acid 1-543
U5/7	3′→5′ direction	10407 to 13004	amino acid 1-866
U8	3′→5′ direction	13174 to 14262	amino acid 1-363
U10	5′→3′ direction	14608 to 15963	amino acid 1-452
U11	3′→5′ direction	15982 to 18249	amino acid 1-756
U12	5′→3′ direction	18396 to 19436	amino acid 1-347
U13	5′→3′ direction	19521 to 19817	amino acid 1-99
U14	5′→3′ direction	19885 to 21831	amino acid 1-649
U15	3′→5′ direction	22244 to 22564	amino acid 1-107
U17Ex	3′→5′ direction	22772-23547 &	amino acid 1-331
		23620-23836
U17	3′→5′ direction	23570 to 23836	amino acid 1-89
U17a	5′→3′ direction	24318 to 24587	amino acid 1-90
U18	3′→5′ direction	24713 to 25600	amino acid 1-296
U19	3′→5′ direction	25945 to 26922	amino acid 1-326
U20	3′→5′ direction	27036 to 28211	amino acid 1-392
U21	3′→5′ direction	28202 to 29494	amino acid 1-431
U23	3′→5′ direction	29903 to 30418	amino acid 1-172
U24	3′→5′ direction	30524 to 30772	amino acid 1-83
U24a	3′→5′ direction	30776 to 31129	amino acid 1-118
U25	3′→5′ direction	30936 to 31898	amino acid 1-321
U26	3′→5′ direction	31988 to 32869	amino acid 1-294
8	3′→5′ direction	34064 to 36484	amino acid 1-807
U29	3′→5′ direction	36487 to 37347	amino acid 1-287
U30U27	3′→5′ direction	32857 to 33951	amino acid 1-365
U2	5′→3′ direction	37362 to 40178	amino acid 1-939
U31	5′→3′ direction	40179 to 46358	amino acid 1-2060
U32	3′→5′ direction	46355 to 46627	amino acid 1-91
U33	3′→5′ direction	46608 to 48041	amino acid 1-478
U34	3′→5′ direction	47992 to 48768	amino acid 1-259
U35	3′→5′ direction	48805 to 49119	amino acid 1-105
U36	5′→3′ direction	49118 to 50575	amino acid 1-486
U37	5′→3′ direction	50577 to 51356	amino acid 1-260
U38	3′→5′ direction	51363 to 54401	amino acid 1-1013
U39	3′→5′ direction	54401 to 56869	amino acid 1-823
U40	3′→5′ direction	56832 to 58997	amino acid 1-722
U41	3′→5′ direction	59000 to 62395	amino acid 1-1132
U42	3′→5′ direction	62772 to 64352	amino acid 1-527
U43	3′→5′ direction	64501 to 67086	amino acid 1-862
U44	5′→3′ direction	67143 to 67754	amino acid 1-204
U45	3′→5′ direction	67759 to 68898	amino acid 1-380
U46	5′→3′ direction	68930 to 69190	amino acid 1-87
U47	3′→5′ direction	69638 to 70579	amino acid 1-314
U48	3′→5′ direction	70817 to 72889	amino acid 1-691
U49	5′→3′ direction	73003 to 73722	amino acid 1-240
U50	5′→3′ direction	73538 to 75202	amino acid 1-555
U51	5′→3′ direction	75304 to 76188	amino acid 1-295
U52	3′→5′ direction	76185 to 76949	amino acid 1-255
U53	5′→3′ direction	76957 to 78495	amino acid 1-513
U54	3′→5′ direction	78503 to 79870	amino acid 1-456
U55A	3′→5′ direction	79918 to 81201	amino acid 1-428
U55B	3′→5′ direction	81285 to 82577	amino acid 1-431
U56	3′→5′ direction	82630 to 83511	amino acid 1-294
U57	3′→5′ direction	83514 to 87551	amino acid 1-1346
U58	5′→3′ direction	87563 to 89890	amino acid 1-776
U59	5′→3′ direction	89838 to 90881	amino acid 1-348
U60-U66	3′→5′ direction	90878-92005 &	amino acid 1-664
		95122-95985
U62	5′→3′ direction	92017 to 92244	amino acid 1-76
U63	5′→3′ direction	92216 to 92851	amino acid 1-212
U64	5′→3′ direction	92829 to 94148	amino acid 1-440
U65	5′→3′ direction	94111 to 95103	amino acid 1-331
U67	5′→3′ direction	95984 to 97024	amino acid 1-347
U68	5′→3′ direction	97024 to 97368	amino acid 1-115
U69	5′→3′ direction	97371 to 99011	amino acid 1-547
U70	5′→3′ direction	99013 to 100455	amino acid 1-481
U71	5′→3′ direction	100392 to 100613	amino acid 1-74
U72	3′→5′ direction	100636 to 101676	amino acid 1-347
U73	5′→3′ direction	101693 to 104056	amino acid 1-788
U74	5′→3′ direction	104007 to 105986	amino acid 1-660
U75	3′→5′ direction	105973 to 106743	amino acid 1-257
U76	3′→5′ direction	106667 to 108589	amino acid 1-641
U77	5′→3′ direction	108435 to 110897	amino acid 1-821
H5	5′→3′ direction	112811 to 113311	amino acid 1-167
U79	5′→3′ direction	113502 to 114203	amino acid 1-234
H6	5′→3′ direction	114257 to 114505	amino acid 1-83
U80	5′→3′ direction	114557 to 115189	amino acid 1-211
U81	3′→5′ direction	115184 to 115948	amino acid 1-255
U82	3′→5′ direction	116038 to 116778	amino acid 1-247
U84	3′→5′ direction	117111 to 118043	amino acid 1-311
U85	3′→5′ direction	118071 to 118913	amino acid 1-281
U86	3′→5′ direction	119091 to 122708	amino acid 1-1206
U89	3′→5′ direction	125420 to 128668	amino acid 1-1083
U90	3′→5′ direction	128776 to 129051	amino acid 1-92
U91	5′→3′ direction	129122 to 129625	amino acid 1-168
H7	5′→3′ direction	130829 to 132112	amino acid 1-428
U95	5′→3′ direction	133382 to 136204	amino acid 1-941
H8	3′→5′ direction	136307 to 136579	amino acid 1-91
U98	3′→5′ direction	137945 to 138451	amino acid 1-169
U99	3′→5′ direction	138375 to 138692	amino acid 1-106
U100	3′→5′ direction	138751 to 138999	amino acid 1-83
H1′	5′→3′ direction	139080 to 139589	amino acid 1-170
DR1′	5′→3′ direction	139415 to 139873	amino acid 1-153
DR2′	5′→3′ direction	139945 to 141147	amino acid 1-401
H2′	5′→3′ direction	141314 to 141553	amino acid 1-80
DR6′	5′→3′ direction	141609 to 142097	amino acid 1-163
DR7′	5′→3′ direction	142169 to 142957	amino acid 1-263
H3′	3′→5′ direction	143023 to 143271	amino acid 1-83
H4′	3′→5′ direction	143496 to 143792	amino acid 1-99.

In the above-described table, “5′→3′ direction” indicates that the ORF has the same direction as that of the nucleic acid sequence of SEQ ID NO.: 1. “3′→5′ direction” indicates that the ORF has a reverse direction with respect to that of the nucleic acid sequence of SEQ ID NO.: 1. By identifying a sequence homologous to the nucleic acid sequence and/or the amino acid sequence of the ORF, those skilled in the art can easily identify the ORF in the genome of a strain other than strain JI.

Features of a gene product coded by each ORF in the HHV-7 genome are described in Tables 1 to 3 below.

TABLE 1
Non-essential genes of HHV-7
	Amino acid
	residue
ORF	length	Features
H1	169	—
DR1	152	US22 gene family, DR1/6 homolog
DR2	400	US22 gene family
H2	79	—
DR6	161	US22 gene family, DR1/6 homolog
DR7	262	US22 gene family, transcription activating agent
H3	82	—
H4	98	—
U2	359	US22 gene family
U3	384	US22 gene family
U4	542	—
U5/7	865	US22 gene family
U8	362	US22 gene family
U10	451	—
U12	346	GCR homolog, chemokine receptor
U13	98
U15	106
U16	264	IE-B transcription activating agent
		(spliced into U17)
U17Ex	72	IE-B transcription activating agent
		(spliced into U16)
U17	88
U17a	89
U18	295	IE-B, HCMV IE glycoprotein homolog
U19	325	IE-B
U20	391	Ig gene family?
U21	430	glycoprotein
U23	171	glycoprotein, EHV-1 gJ homolog
U24	82	glycoprotein
U24a	117
U25	320	US22 gene family, transcription activating agent
U26	293
U28	806	ribonucleotide reductase (large subunit)
U32	90
U33	477	virion protein
U34	258	virion protein?
U35	104
U36	485	considered to be virion protein
U37	259
U40	721	transport protein
U42	526	transcription activating agent
U44	203
U45	379	dUTPase
U46	86
U47	313
U49	239	fusion protein
U50	554	virion protein
U51	294	GCR, opioid homolog
U52	254
U55A	427	replication function?
U55B	430	replication function?
U58	775
U59	347
U62	75
U63	211
U64	439
U65	330
U67	346
U68	114
U69	546	phosphotransferase
U70	480	alkali exonuclease
U71	73
U75	256
U76	640	virion protein?
H5	166
U79	233	HCMV replication, spliced (UL112/113)
H6	82	homolog of C-terminus of U79 of HHV-6
U80	210	HCMV replication, spliced (UL112/113)
U81	254	uracil-DNA glycosylase
U84	310	splised in HCMV
U85	280	homolog of OX-2 glycoprotein
U91	167
H7	427	Dral repeat
U95	940	MCMV IE2 homolog, US22 gene family
H8	90

TABLE 2
HHV-7 genes involved in viral replication
		Amino acid
	ORF	residue length	Features
	U27	364	polymerase promoting agent
	U38	1,012	DNA polymerase
	U41	1,131	single stranded DNA-binding protein
	U43	861	primase
	U73	787	origin binding protein (OBP)
	U74	659	helicase/primase complex
	U77	820	helicase
	U86	1,205	homology to IE-A, HCMV IE2
	U89	1,082	IE-A transcription activating agent
	U90	91	exon in IE-A, HHV-6

TABLE 3
HHV-7 genes involved in formation of viral particle
	Amino acid
ORF	residue length	Features
U11	755	structural phophorylated protein
U14	648	HCMV UL25/35 gene family
U29	286	minor capsid protein (mCP)
U30	938	capsid assembly, myosin
		agent involved in association and formation of
		capsid (part of viral particle)
U31	2,059	large tegument protein
U39	822	glycoprotein B (gB)
U48	690	glycoprotein H (gH)
U53	512	protease/assembly protein
U54	455	tegument protein, transcription activating
		agent
U56	293	capsid protein
U57	1,345	major capsid protein (MCP)
U60	394	spliced in later phase (U60/66)
		protein involved in DNA packaging
U66	309	spliced in later phase (U60/66)
		protein involved in DNA packaging
U72	346	intramembranous protein (gM)
U82	246	glycoprotein L (gL)
U98	168	protein homologous to HHV-6 gQ
U99	105	protein homologous to HHV-6 gQ
U100	82	protein homologous to HHV-6 gQ

(Human Herpesvirus 6A; HHV-6A)

Examples of non-essential genes of human herpesvirus 6 (HHV-6A) include, but are not limited to, gene LT1, gene DR1, gene DR2, gene DR3, gene DR4, gene DR5, gene DR6, gene DRHN1, gene DR7, gene DRHN2, gene DR8, gene LJ1, gene U1, gene U2, gene U3, gene U4, gene U5, gene U6, gene U7, gene U8, gene U9, gene U10, gene U12EX, gene U12, gene U13, gene U15, gene U16, gene U17, gene U18, gene U19, gene U20, gene U21, gene U22, gene U23, gene U24, gene U25, gene U26, gene U28, gene U32, gene U33, gene U34, gene U35, gene U36, gene U37, gene U40, gene U42, gene U44, gene U45, gene U46, gene U47, gene U49, gene U50, gene U51, gene U52, gene U55, gene U58, gene U59, gene U61, gene U62, gene U63, gene U64, gene U65, gene U67, gene U68, gene U69, gene U70, gene U71, gene U75, gene U76, gene U78, gene U79, gene U80, gene U81, gene U83, gene U84, gene U85, gene U88, gene U91, gene U92, gene U93, gene HN2, gene U94, gene U95, and gene U96.

When a gene in a viral genome is an essential gene, the virus cannot grow in the absence of the gene. Therefore, by deleting an arbitrary gene in a viral genome and detecting the growth of the virus, it is possible to determine whether the gene is an essential gene or a non-essential gene.

A region within the ORF of the above-described non-essential gene and/or a region flanking the ORF, can be used as a target for inserting a BAC vector. Examples of such a preferable target include, but are not limited to, a region within or flanking the ORF of gene U5, and a region within or flanking the ORF of gene U8. A region flanking the ORF of gene U5 and a region flanking the ORF of gene U8 are more preferable.

As used herein, the term “wild strain” in relation to HHV-6A refers to a HHV-6A strain which is not artificially modified and is isolated from the nature. An example of a wild strain includes, but is not limited to, strain U1102. The nucleic acid sequence of strain U1102 is set forth in SEQ ID NO.: 128. The reading frame direction, the site on the genome, and the number of amino acid residues of a coded polypeptide of each ORF of strain U1102 are described below.

ORF	Reading frame	Site on	Number of amino
Name	direction	genome	acid residues
LT1	3′→5′ direction	1 to 338	amino acid 1-113
DR1	5′→3′ direction	501 to 794	amino acid 1-98
DR2	5′→3′ direction	791 to 2653	amino acid 1-621
DR3	3′→5′ direction	2401 to 2979	amino acid 1-193
DR4	5′→3′ direction	2746 to 3048	amino acid 1-101
DR5	3′→5′ direction	3734 to 4171	amino acid 1-146
DR6	5′→3′ direction	4725 to 5036	amino acid 1-104
DR7	5′→3′ direction	5629 to 6720	amino acid 1-364
DR8	5′→3′ direction	7237 to 7569	amino acid 1-111
LJ1	3′→5′ direction	7467 to 8432	amino acid 1-322
U1	5′→3′ direction	8245 to 8616	amino acid 1-124
U2	3′→5′ direction	8716 to 9816	amino acid 1-367
U3	3′→5′ direction	10155 to 11276	amino acid 1-374
U4	3′→5′ direction	11485 to 13092	amino acid 1-536
U5	3′→5′ direction	13214 to 14548	amino acid 1-445
U6	5′→3′ direction	14619 to 14867	amino acid 1-83
U7	3′→5′ direction	14908 to 15936	amino acid 1-343
U8	3′→5′ direction	16021 to 17091	amino acid 1-357
U9	3′→5′ direction	17238 to 17552	amino acid 1-105
U10	5′→3′ direction	17604 to 18914	amino acid 1-437
U11	3′→5′ direction	18966 to 21578	amino acid 1-871
U12 exon 1-2	5′→3′ direction	21680-21710 & 21800-22812	amino acid 1-348
U12	5′→3′ direction	21856 to 22812	amino acid 1-319
U13	5′→3′ direction	22898 to 23218	amino acid 1-107
U14	5′→3′ direction	23316 to 25145	amino acid 1-610
U15	3′→5′ direction	25660 to 25992	amino acid 1-111
U16 exon 1-2	3′→5′ direction	26259-27034 & 27187-27349	amino acid 1-313
U16	3′→5′ direction	26259 to 27116	amino acid 1-286
U17	3′→5′ direction	26948 to 27349	amino acid 1-134
U18	3′→5′ direction	28508 to 29389	amino acid 1-294
U19	3′→5′ direction	29649 to 30818	amino acid 1-390
U20	3′→5′ direction	31069 to 32337	amino acid 1-423
U21	3′→5′ direction	32340 to 33641	amino acid 1-434
U22	3′→5′ direction	33739 to 34347	amino acid 1-203
U23	3′→5′ direction	34375 to 35085	amino acid 1-237
U24	3′→5′ direction	35392 to 35655	amino acid 1-88
	3′→5′ direction	35674 to 35847	amino acid 1-58
U25	3′→5′ direction	35864 to 36814	amino acid 1-317
U26	3′→5′ direction	36922 to 37809	amino acid 1-296
U27	3′→5′ direction	37797 to 38978	amino acid 1-394
U28	3′→5′ direction	39020 to 41434	amino acid 1-805
U29	3′→5′ direction	41457 to 42356	amino acid 1-300
U30	5′→3′ direction	41884 to 45132	amino acid 1-1083
U31	5′→3′ direction	45150 to 51383	amino acid 1-2078
U32	3′→5′ direction	51455 to 51721	amino acid 1-89
U33	3′→5′ direction	51723 to 53135	amino acid 1-471
U34	3′→5′ direction	53086 to 53916	amino acid 1-277
U35	3′→5′ direction	53933 to 54253	amino acid 1-107
U36	5′→3′ direction	54252 to 55706	amino acid 1-485
U37	5′→3′ direction	55710 to 56504	amino acid 1-265
U38	3′→5′ direction	56550 to 59588	amino acid 1-1013
U39	3′→5′ direction	59588 to 62080	amino acid 1-831
U40	3′→5′ direction	62034 to 64214	amino acid 1-727
U41	3′→5′ direction	64222 to 67620	amino acid 1-1133
U42	3′→5′ direction	69054 to 70598	amino acid 1-515
U43	3′→5′ direction	70823 to 73405	amino acid 1-861
U44	5′→3′ direction	73446 to 74087	amino acid 1-214
U45	3′→5′ direction	74088 to 75218	amino acid 1-377
U46	5′→3′ direction	75291 to 75545	amino acid 1-85
U47	3′→5′ direction	75912 to 77867	amino acid 1-652
U48	3′→5′ direction	78034 to 80118	amino acid 1-695
U49	5′→3′ direction	80277 to 81035	amino acid 1-253
U50	5′→3′ direction	80812 to 82479	amino acid 1-556
U51	5′→3′ direction	82574 to 83479	amino acid 1-302
U52	3′→5′ direction	83498 to 84274	amino acid 1-259
U53	5′→3′ direction	84281 to 85867	amino acid 1-529
U54	3′→5′ direction	86051 to 87427	amino acid 1-459
U55	3′→5′ direction	87505 to 88803	amino acid 1-433
U56	3′→5′ direction	88983 to 89873	amino acid 1-297
U57	3′→5′ direction	89875 to 93912	amino acid 1-1346
U58	5′→3′ direction	93924 to 96242	amino acid 1-773
U59	5′→3′ direction	96239 to 97291	amino acid 1-351
U60	3′→5′ direction	97288 to 98256	amino acid 1-323
U61	3′→5′ direction	98231 to 98578	amino acid 1-116
U62	5′→3′ direction	98427 to 98684	amino acid 1-86
U63	5′→3′ direction	98632 to 99282	amino acid 1-217
U64	5′→3′ direction	99260 to 100588	amino acid 1-443
U65	5′→3′ direction	100545 to 101552	amino acid 1-336
U66	3′→5′ direction	101569 to 102486	amino acid 1-306
U67	5′→3′ direction	102458 to 103519	amino acid 1-354
U68	5′→3′ direction	103519 to 103863	amino acid 1-115
U69	5′→3′ direction	103866 to 105554	amino acid 1-563
U70	5′→3′ direction	105562 to 107028	amino acid 1-489
U71	5′→3′ direction	106965 to 107198	amino acid 1-78
U72	3′→5′ direction	107278 to 108312	amino acid 1-345
U73	5′→3′ direction	108325 to 110667	amino acid 1-781
U74	5′→3′ direction	110636 to 112624	amino acid 1-663
U75	3′→5′ direction	112659 to 113408	amino acid 1-250
U76	3′→5′ direction	113317 to 115305	amino acid 1-663
U77	5′→3′ direction	115100 to 117574	amino acid 1-825
U78	3′→5′ direction	118709 to 119038	amino acid 1-110
U79	5′→3′ direction	120164 to 121198	amino acid 1-345
U80	5′→3′ direction	121170 to 121766	amino acid 1-199
U81	3′→5′ direction	121810 to 122577	amino acid 1-256
U82	3′→5′ direction	122653 to 123405	amino acid 1-251
U83	5′→3′ direction	123528 to 123821	amino acid 1-98
U84	3′→5′ direction	123925 to 124953	amino acid 1-343
U85	3′→5′ direction	124981 to 125853	amino acid 1-291
U86	3′→5′ direction	125989 to 128136	amino acid 1-716
U87	3′→5′ direction	127551 to 130043	amino acid 1-831
U88	5′→3′ direction	131034 to 132275	amino acid 1-414
U89	3′→5′ direction	133091 to 135610	amino acid 1-840
U90	3′→5′ direction	135664 to 135948	amino acid 1-95
Putative protein U90	5′→3′ direction	136266 to 136481	amino acid 1-72
U91	5′→3′ direction	136485 to 136829	amino acid 1-115
U92	3′→5′ direction	138049 to 138492	amino acid 1-148
U93	3′→5′ direction	138531 to 139124	amino acid 1-198
U94	3′→5′ direction	141394 to 142866	amino acid 1-491
U95	5′→3′ direction	142941 to 146306	amino acid 1-1122
U96	3′→5′ direction	146641 to 146940	amino acid 1-100
U97	3′→5′ direction	147808 to 148077	amino acid 1-90
U98	3′→5′ direction	148741 to 149391	amino acid 1-217
U99	3′→5′ direction	149485 to 149766	amino acid 1-94
U100	3′→5′ direction	149868 to 150437	amino acid 1-190
RJ1	3′→5′ direction	151140 to 151571	amino acid 1-144
DR1	5′→3′ direction	151734 to 152027	amino acid 1-98
DR2	5′→3′ direction	152024 to 153886	amino acid 1-621
DR3	3′→5′ direction	153634 to 154212	amino acid 1-193
DR4	5′→3′ direction	153979 to 154281	amino acid 1-101
DR5	3′→5′ direction	154967 to 155404	amino acid 1-146
DR6	5′→3′ direction	155958 to 156269	amino acid 1-104
DR7	5′→3′ direction	156862 to 157953	amino acid 1-364
DR8	5′→3′ direction	158470 to 158802	amino acid 1-111.

In the above-described table, “5′→3′ direction” indicates that the ORF has the same direction as that of the nucleic acid sequence of SEQ ID NO.: 128. “3′→5′ direction” indicates that the ORF has a reverse direction with respect to that of the nucleic acid sequence of SEQ ID NO.: 128. By identifying a sequence homologous to the nucleic acid sequence and/or the amino acid sequence of the ORF, those skilled in the art can easily identify the ORF in the genome of a strain other than strain U1102.

As used herein, the term “mutant strain” refers to a herpesvirus strain which has a mutation due to mutagenesis, multiple subculturings or the like. Mutagenesis of a herpesvirus strain may be either random mutagenesis or site-specific mutagenesis.

(Human Herpesvirus 6B; HHV-6B)

Examples of non-essential genes which are considered to be of HHV-6B having substantially the same genome structure as that of HHV-6A, include, but are not limited to: gene LT1, gene DR1, gene DR2, gene DR3, gene DR4, gene DR5, gene DR6, gene DRHN1, gene DR7, gene DRHN2, gene DR8, gene LJ1, gene U1, gene U2, gene U3, gene U4, gene U5, gene U6, gene U7, gene U8, gene U9, gene U10, gene U12EX, gene U12, gene U13, gene U15, gene U16, gene U17, gene U18, gene U19, gene U20, gene U21, gene U22, gene U23, gene U24, gene U25, gene U26, gene U28, gene U32, gene U33, gene U34, gene U35, gene U36, gene U37, gene U40, gene U42, gene U44, gene U45, gene U46, gene U47, gene U49, gene U50, gene U51, gene U52, gene U55, gene U58, gene U59, gene U61, gene U62, gene U63, gene U64, gene U65, gene U67, gene U68, gene U69, gene U70, gene U71, gene U75, gene U76, gene U78, gene U79, gene U80, gene U81, gene U83, gene U84, gene U85, gene U88, gene U91, gene U92, gene U93, gene HN2, gene U94, gene U95, and gene U96.

When a gene in a viral genome is an essential gene, the virus cannot grow in the absence of the gene. Therefore, by deleting an arbitrary gene in a viral genome and detecting the growth of the virus, it is possible to determine whether the gene is an essential gene or a non-essential gene.

A region within the ORF of the above-described non-essential gene and/or a region flanking the ORF, can be used as a target for inserting a BAC vector. Examples of such a preferable target include, but are not limited to, a region within or flanking the ORF of gene U5, and a region within or flanking the ORF of gene U8. A region flanking the ORF of gene U5 and a region flanking the ORF of gene U8 are more preferable.

As used herein, the term “wild strain” in relation to HHV-6B refers to a HHV-6B strain which is not artificially modified and is isolated from the nature. An example of a wild strain includes, but is not limited to, strain HST. The nucleic acid sequence of strain HST is set forth in SEQ ID NO.: 272. The reading frame direction, the site on the genome, and the number of amino acid residues of a coded polypeptide of each ORF of strain HST are described below.

ORF	Reading frame	Site on	Number of amino
Name	direction	genome	acid residues
LT1	3′→5′ direction	18 to 365	amino acid 1-116
DR1	5′→3′ direction	576 to 842	amino acid 1-89
DR2	5′→3′ direction	1027 to 2970	amino acid 1-648
DR3	3′→5′ direction	2718 to 3320	amino acid 1-201
DRHN1	3′→5′ direction	5023 to 5532	amino acid 1-170
DR6	5′→3′ direction	5025 to 5336	amino acid 1-104
DR7	5′→3′ direction	6512 to 7150	amino acid 1-213
DRHN2	3′→5′ direction	7236 to 7706	amino acid 1-157
D	5′→3′ direction	7928 to 8662	amino acid 1-245
LJ1	3′→5′ direction	8292 to 8807	amino acid 1-172
U1	5′→3′ direction	8929 to 9384	amino acid 1-152
U2	3′→5′ direction	9467 to 10768	amino acid 1-434
U3	3′→5′ direction	10891 to 12051	amino acid 1-387
U4	3′→5′ direction	12276 to 13883	amino acid 1-536
U5	3′→5′ direction	14002 to 15333	amino acid 1-444
U6	5′→3′ direction	15395 to 15652	amino acid 1-86
U7	3′→5′ direction	15678 to 16802	amino acid 1-375
U8	3′→5′ direction	16806 to 18041	amino acid 1-412
U9	3′→5′ direction	18022 to 18336	amino acid 1-105
U10	5′→3′ direction	18386 to 19897	amino acid 1-504
U11	3′→5′ direction	19801 to 22377	amino acid 1-859
U12	5′→3′ direction	22479-22511 &	amino acid 1-354
		22589-23617
U13	5′→3′ direction	23699 to 24022	amino acid 1-108
U14	5′→3′ direction	24136 to 25953	amino acid 1-606
U15	3′→5′ direction	26559 to 26891	amino acid 1-111
U16	3′→5′ direction	27172 to 27603	amino acid 1-144
U17	3′→5′ direction	28003 to 28263	amino acid 1-87
U18	3′→5′ direction	29443 to 30327	amino acid 1-295
U19	3′→5′ direction	30592 to 31761	amino acid 1-390
U20	3′→5′ direction	31984 to 33288	amino acid 1-435
U21	3′→5′ direction	33291 to 34793	amino acid 1-501
U22	3′→5′ direction	34690 to 35298	amino acid 1-203
U23	3′→5′ direction	35326 to 36225	amino acid 1-300
U24	3′→5′ direction	36350 to 36616	amino acid 1-89
U25	3′→5′ direction	36825 to 37775	amino acid 1-317
U26	3′→5′ direction	37883 to 38770	amino acid 1-296
U27	3′→5′ direction	38758 to 39933	amino acid 1-392
U28	3′→5′ direction	39975 to 42389	amino acid 1-805
U29	3′→5′ direction	42412 to 43311	amino acid 1-300
U30	5′→3′ direction	42839 to 46087	amino acid 1-1083
U31	5′→3′ direction	46105 to 52338	amino acid 1-2078
U32	3′→5′ direction	52412 to 52681	amino acid 1-90
U33	3′→5′ direction	52683 to 54095	amino acid 1-471
U34	3′→5′ direction	54046 to 54876	amino acid 1-277
U35	3′→5′ direction	54893 to 55210	amino acid 1-106
U36	5′→3′ direction	55212 to 56660	amino acid 1-483
U37	5′→3′ direction	56664 to 57458	amino acid 1-265
U38	3′→5′ direction	57504 to 60542	amino acid 1-1013
U39	3′→5′ direction	60542 to 63034	amino acid 1-831
U40	3′→5′ direction	62988 to 65168	amino acid 1-727
U41	3′→5′ direction	65176 to 68574	amino acid 1-1133
U42	3′→5′ direction	69937 to 71487	amino acid 1-517
U43	3′→5′ direction	71712 to 74294	amino acid 1-861
U44	5′→3′ direction	74335 to 75030	amino acid 1-232
U45	3′→5′ direction	74977 to 76107	amino acid 1-377
U46	5′→3′ direction	76180 to 76434	amino acid 1-85
U47	3′→5′ direction	76617 to 78833	amino acid 1-739
U48	3′→5′ direction	79099 to 81183	amino acid 1-695
U49	5′→3′ direction	81342 to 82100	amino acid 1-253
U50	5′→3′ direction	81877 to 83544	amino acid 1-556
U51	5′→3′ direction	83642 to 84547	amino acid 1-302
U52	3′→5′ direction	84744 to 85343	amino acid 1-200
U53	5′→3′ direction	85350 to 86936	amino acid 1-529
U54	3′→5′ direction	87171 to 88550	amino acid 1-460
U55	3′→5′ direction	88628 to 90106	amino acid 1-493
U56	3′→5′ direction	90107 to 90997	amino acid 1-297
U57	3′→5′ direction	90999 to 95036	amino acid 1-1346
U58	5′→3′ direction	95048 to 97366	amino acid 1-773
U59	5′→3′ direction	97375 to 98415	amino acid 1-347
U60	3′→5′ direction	98412 to 99380	amino acid 1-323
U61	3′→5′ direction	99355 to 99867	amino acid 1-171
U62	5′→3′ direction	99551 to 99814	amino acid 1-88
U63	5′→3′ direction	99756 to 100412	amino acid 1-219
U64	5′→3′ direction	100390 to 101718	amino acid 1-443
U65	5′→3′ direction	101675 to 102682	amino acid 1-336
U66	3′→5′ direction	102702 to 103619	amino acid 1-306
U67	5′→3′ direction	103591 to 104652	amino acid 1-354
U68	5′→3′ direction	104652 to 104996	amino acid 1-115
U69	5′→3′ direction	104999 to 106690	amino acid 1-564
U70	5′→3′ direction	106698 to 108164	amino acid 1-489
U71	5′→3′ direction	108101 to 108346	amino acid 1-82
U72	3′→5′ direction	108428 to 109462	amino acid 1-345
U73	5′→3′ direction	109475 to 111817	amino acid 1-781
U74	5′→3′ direction	111786 to 113774	amino acid 1-663
U75	3′→5′ direction	113379 to 113756	amino acid 1-126
U76	3′→5′ direction	114467 to 116455	amino acid 1-663
U77	5′→3′ direction	116250 to 118724	amino acid 1-825
U79	5′→3′ direction	121322 to 122359	amino acid 1-346
U80	5′→3′ direction	122640 to 122942	amino acid 1-101
U81	3′→5′ direction	122986 to 123753	amino acid 1-256
U82	3′→5′ direction	123829 to 124581	amino acid 1-251
U83	5′→3′ direction	124657 to 124998	amino acid 1-114
U84	3′→5′ direction	125104 to 126132	amino acid 1-343
U85	3′→5′ direction	126160 to 127038	amino acid 1-293
U86	3′→5′ direction	127176 to 131717	amino acid 1-1514
U89	3′→5′ direction	134808 to 137684	amino acid 1-959
U90	3′→5′ direction	137810 to 138085	amino acid 1-92
U91	5′→3′ direction	138630 to 138974	amino acid 1-115
HN1	3′→5′ direction	141543 to 142355	amino acid 1-271
U94	3′→5′ direction	142683 to 144155	amino acid 1-491
U95	5′→3′ direction	144230 to 147868	amino acid 1-1213
U97	3′→5′ direction	149352 to 149651	amino acid 1-100
HN2	3′→5′ direction	149749 to 149913	amino acid 1-55
U98	3′→5′ direction	150376 to 150870	amino acid 1-165
U99	3′→5′ direction	151115 to 151396	amino acid 1-94
U100	3′→5′ direction	151529 to 151918	amino acid 1-130
RJ1	3′→5′ direction	153060 to 153407	amino acid 1-116
DR1R	5′→3′ direction	153618 to 153884	amino acid 1-89
DR2R	5′→3′ direction	154069 to 156012	amino acid 1-648
DR3R	3′→5′ direction	155760 to 156362	amino acid 1-201
DRHN1R	3′→5′ direction	158065 to 158574	amino acid 1-170
DR6R	5′→3′ direction	158067 to 158378	amino acid 1-104
DR7R	5′→3′ direction	159554 to 160192	amino acid 1-213
DRHN2R	3′→5′ direction	160278 to 160748	amino acid 1-157.

In the above-described table, “5′→3′ direction” indicates that the ORF has the same direction as that of the nucleic acid sequence of SEQ ID NO.: 272. “3′→5′ direction” indicates that the ORF has a reverse direction with respect to that of the nucleic acid sequence of SEQ ID NO.: 272. By identifying a sequence homologous to the nucleic acid sequence and/or the amino acid sequence of the ORF, those skilled in the art can easily identify the ORF in the genome of a strain other than strain HST.

(Proteins Coded ORF's of HHV-6A and HHV-6B)

Features of a gene product coded by each ORF in the HHV-6A and HHV-6B genome are described in Tables 4 to 6 below. In the tables, the amino acid residue length of each ORF in strain U1102 of HHV-6A and strain HST of HHV-6B is indicated.

TABLE 4
Non-essential gene of HHV-6
	Amino acid residue
ORF	length U1102/HST	Features
LT1	112/115
DR1	97/88	US22 gene family
DR2	620/647	US22 gene family
DR3	192/200
DR4	100/—
DR5	145/—
DR6	103/103	US22 gene family
DRHN1	—/169
DR7	363/212	US22 gene family, transcription
		activating agent
DRHN2	—/156
DR8	110/244
LJ1	321/172
U1	123/151
U2	366/433	US22 gene family
U3	373/386	US22 gene family
U4	535/535
U5	444/443
U6	82/85
U7	342/374	US22 gene family
U8	356/411	US22 gene family
U9	104/104
U10	436/503
U12EX	347/353	U12 exon 1
U12	318/305	U12 exon 2, CC-chemokine receptor
U13	106/107
U15	110/110
U16	143/143	IE-B, transcription activating agent,
		US22 gene family
U17	133/86	IE-B
U18	293/294	homologous to IE-B, HCMV IE
		glycoprotein
U19	389/389	IE-B
U20	422/434	glycoprotein, Ig-chain C domain
U21	433/500	glycoprotein
U22	202/202	glycoprotein
U23	236/299	glycoprotein
U24	87/88
U25	316/316	US22 gene family, transcription
		activating agent
U26	295/295
U28	804/804	ribonucleotide reductase (large
		subunit)
U32	88/89
U33	470/470	capsid protein
U34	276/276	possible virion protein
U35	106/106
U36	484/481	possible virion protein
U37	264/264
U40	726/726	transport protein
U42	514/516	transcription activating agent
U44	213/231
U45	376/376	dUTPase
U46	84/84
U47	651/738
U49	252/252	fusion protein
U50	555/555	virion protein
U51	301/301	GCR, homolog of opioid
U52	258/258
U55	432/492
U58	772/772
U59	350/350
U61	115/170
U62	85/87
U63	216/218
U64	442/442
U65	335/335
U67	353/353
U68	114/114
U69	562/563	Ganciclovir kinase,
		conserved phosphotransferase
U70	488/488	alkali exonuclease
U71	77/81
U75	249/249
U76	662/662
U78	109/—
U79	344/345	HCMV replication, spliced
		(UL112/113)
U80	198/203	HCMV replication, spliced
		(UL112/113)
U81	255/255	uracil - DNA glycosylase
U83	97/113	chemokine
U84	342/342	spliced in HCMV
U85	290/292	homologous to OX-2 glycoprotein
U88	413/—
U91	114/114
U92	147/—
U93	197/—
HN2	—/270
U94	490/490	provirus replication, transcription
		activation
U95	1,121/1,197	MCMV IE2 homolog, US22 gene
		family
U96	99/—

TABLE 5
HHV-6 genes involved in viral replication
		Amino acid
		residue
	ORF	lengthU1102/HST	Features
	U27	393/391	DNA polymerase promoting agent
	U38	1,012/1,012	DNA polymerase
	U41	1,132/1,132	single stranded DNA - binding
			protein
	U43	860/860	helicase/primase complex
	U73	780/780	origin binding protein (OBP)
	U74	662/662	helicase/primase complex
	U77	824/824	helicase/primase complex
	U86	1,351/1,513	homology to IE-A, HCMV IE2
	U89	839/958	IE-A, transcription activating agent
	U90	94/89	exon in IE-A
	HN1	—/32	exon in IE-A

TABLE 6
HHV-6 genes involved in formation of viral particle
	Amino acid residue
ORF	lengthU1102/HST	Features
U11	870/858	pp100, major antigenic structural protein
U14	609/610	HCMV UL25/35 gene family
U29	299/299	minor capsid protein (mCP)
U30	1,082/1,082	capsid assembly, myosin (agent
		involeved in association and formation
		of capsid (part of viral particle)
U31	2,077/2,077	large tegument protein
U39	830/830	glycoprotein B (gB)
U48	694/694	glycoprotein H (gH)
U53	528/528	protease/assembly protein
U54	458/459	tegument protein, transcription
		activating agent
U56	296/296	capsid protein
U57	1,345/1,345	major capsid protein (MCP)
U60	322/322	spliced in later phase (U60/66)
		protein involved in DNA packaging
U66	305/305	spliced in later phase (U60/66)
		protein involved in DNA packaging
U72	344/344	intramembranous protein (gM)
U82	250/250	glycoprotein L (gL)
U97	89/99	glycoprotein Q (gQ) exon
HN3	—/55	gQ exon
U98	216/164	gQ exon
U99	93/93	gQ exon
U100	189/129	gQ exon

When a gene in a viral genome is an essential gene, the virus cannot grow in the absence of the gene. Therefore, by deleting an arbitrary gene in a viral genome and detecting the growth of the virus, it is possible to determine whether the gene is an essential gene or a non-essential gene.

As used herein, the term “wild strain” in relation to herpesvirus refers to a herpesvirus strain which is not artificially modified and is isolated from the nature.

As used herein, the term “mutant strain” refers to a herpesvirus strain which has a mutation due to mutagenesis, multiple subculturings or the like. Mutagenesis of a herpesvirus strain may be either random mutagenesis or site-specific mutagenesis.

The terms “protein”, “polypeptide”, “oligopeptide” and “peptide” as used herein have the same meaning and refer to an amino acid polymer having any length.

The terms “polynucleotide”, “oligonucleotide”, and “nucleic acid” as used herein have the same meaning and refer to a nucleotide polymer having any length. Unless otherwise indicated, a particular nucleic acid sequence also implicitly encompasses conservatively-modified variants thereof (e.g. degenerate codon substitutions) and complementary sequences as well as the sequence explicitly indicated. Specifically, degenerate codon substitutions may be produced by generating sequences in which the third position of one or more selected (or all) codons is substituted with mixed-base and/or deoxyinosine residues (Batzer et al., Nucleic Acid Res. 19:5081 (1991); Ohtsuka et al., J. Biol. Chem. 260:2605-2608 (1985); Rossolini et al., Mol. Cell. Probes 8:91-98 (1994)).

As used herein, the term “gene” refers to an element defining a genetic trait. A gene is typically arranged in a given sequence on a chromosome. A gene which defines the primary structure of a protein is called a structural gene. A gene which regulates the expression of a structural gene is called a regulatory gene. As used herein, “gene” may refer to “polynucleotide”, “oligonucleotide”, “nucleic acid”, and “nucleic acid molecule” and/or “protein”, “polypeptide”, “oligopeptide” and “peptide”. As used herein, the term “open reading frame” or “ORF” in relation to a gene, refers to a reading frame which is one of three frames obtained by sectioning the base sequence of a gene at intervals of three bases, and has a start codon and a certain length without a stop codon appearing partway, and has the possibility of actually coding a protein. The entire base sequence of the genome of herpesvirus has been determined, identifying at least 101 genes. Each of the genes is known to have an open reading frame (ORF).

As used herein, the term “region within an ORF” in relation to a gene in a herpesvirus genome, refers to a region in which there are bases constituting the ORF in the gene within the herpesvirus genome.

As used herein, the term “region flanking an ORF” in relation to a gene in a herpesvirus genome, refers to a region in which there are bases existing in the vicinity of the ORF in the gene within the herpesvirus genome, and which does not correspond to a region within the ORF of the gene or other genes.

As used herein, the term “homology” of a gene refers to the proportion of identity between two or more gene sequences. Therefore, the greater the homology between two given genes, the greater the identity or similarity between their sequences. Whether or not two genes have homology is determined by comparing their sequences directly or by a hybridization method under stringent conditions. When two gene sequences are directly compared with each other, these genes have homology if the DNA sequences of the genes have representatively at least 50% identity, preferably at least 70% identity, more preferably at least 80%, 90%, 95%, 96%, 97%, 98%, or 99% identity with each other.

Similarity comparison and homology calculation of base sequences are herein performed using BLAST (sequence analyzing tool) with the default parameters.

As used herein, the term “expression” of a gene, a polynucleotide, a polypeptide, or the like, indicates that the gene or the like is affected by a predetermined action in vivo to be changed into another form. Preferably, the term “expression” indicates that genes, polynucleotides, or the like are transcribed and translated into polypeptides. In one embodiment of the present invention, genes may be transcribed into mRNA. More preferably, these polypeptides may have post-translational processing modifications.

Amino acids may be referred to herein by either their commonly known three letter symbols or by the one-letter symbols recommended by the IUPAC-IUB Biochemical Nomenclature Commission. Nucleotides, likewise, may be referred to by their commonly accepted single-letter codes.

As used herein, the term “fragment” refers to a polypeptide or polynucleotide having a sequence length ranging from 1 to n−1 with respect to the full length of the reference polypeptide or polynucleotide (of length n). The length of the fragment can be appropriately changed depending on the purpose. For example, in the case of polypeptides, the lower limit of the length of the fragment includes 3, 4, 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50 or more nucleotides. Lengths represented by integers which are not herein specified (e.g., 11 and the like) may be appropriate as a lower limit. For example, in the case of polynucleotides, the lower limit of the length of the fragment includes 5, 6, 7, 8, 9, 10, 15, 20, 25, 30, 40, 50, 75, 100 or more nucleotides. Lengths represented by integers which are not herein specified (e.g., 11 and the like) may be appropriate as a lower limit.

A polypeptide encoded by a gene in a BAC vector may have at least one (e.g., one or several) amino acid substitution, addition, and/or deletion or at least one sugar chain substitution, addition, and/or deletion as long as they have substantially the same function as that of a corresponding naturally-occurring polypeptide.

As used herein, the term “sugar chain” refers to a compound which is made up of a series of at least one sugar unit (a monosaccharide and/or its derivative). When two or more sugars unit are linked, the sugars unit are joined by dehydrocondensation due to glycosidic bonds. Examples of such a sugar chain include, but are not limited to, polysaccharides contained in organisms (glucose, galactose, mannose, fucose, xylose, N-acetylglucosamine, N-acetylgalactosamine, sialic acid, and complexes and derivates thereof), and degraded polysaccharides, sugar chains degraded or induced from complex biological molecules (e.g., glycoproteins, proteoglycan, glycosaminoglycan, glycolipids, etc.), and the like. Therefore, the term “sugar chain” may be herein used interchangeably with “polysaccharide”, “carbohydrate”, and “hydrocarbon”. Unless otherwise specified, the term “sugar chain” as used herein includes both a sugar chain and a sugar chain-containing substance.

It is well known that if a given amino acid is substituted with another amino acid having a similar hydrophobicity index, the resultant protein may still have a biological function similar to that of the original protein (e.g., a protein having an equivalent enzymatic activity). For such an amino acid substitution, the hydrophobicity index is preferably within ±2, more preferably within ±1, and even more preferably within ±0.5. It is understood in the art that such an amino acid substitution based on hydrophobicity is efficient. A hydrophilicity index is also useful for modification of an amino acid sequence of the present invention. As described in U.S. Pat. No. 4,554,101, amino acid residues are given the following hydrophilicity indices: arginine (+3.0); lysine (+3.0); aspartic acid (+3.0±1); glutamic acid (+3.0±1); serine (+0.3); asparagine (+0.2); glutamine (+0.2); glycine (0); threonine (−0.4); proline (−0.5±1); alanine (−0.5); histidine (−0.5); cysteine (−1.0); methionine (−1.3); valine (−1.5); leucine (−1.8); isoleucine (−1.8); tyrosine (−2.3); phenylalanine (−2.5); and tryptophan (−3.4). It is understood that an amino acid may be substituted with another amino acid which has a similar hydrophilicity index and can still provide a biological equivalent. For such an amino acid substitution, the hydrophilicity index is preferably within ±2, more preferably ±1, and even more preferably ±0.5.

The term “conservative substitution” as used herein refers to amino acid substitution in which a substituted amino acid and a substituting amino acid have similar hydrophilicity indices or/and hydrophobicity indices. For example, conservative substitution is carried out between amino acids having a hydrophilicity or hydrophobicity index of within ±2, preferably within ±1, and more preferably within ±0.5. Examples of conservative substitution include, but are not limited to, substitutions within each of the following residue pairs: arginine and lysine; glutamic acid and aspartic acid; serine and threonine; glutamine and asparagine; and valine, leucine, and isoleucine, which are well known to those skilled in the art.

As used herein, the term “variant” refers to a substance, such as a polypeptide, polynucleotide, or the like, which differs partially from the original substance. Examples of such a variant include a substitution variant, an addition variant, a deletion variant, a truncated variant, an allelic variant, and the like. Examples of such a variant include, but are not limited to, a nucleotide or polypeptide having one or several substitutions, additions and/or deletions or a nucleotide or polypeptide having at least one substitution, addition and/or deletion. The term “allele” as used herein refers to a genetic variant located at a locus identical to a corresponding gene, where the two genes are distinguished from each other. Therefore, the term “allelic variant” as used herein refers to a variant which has an allelic relationship with a given gene. Such an allelic variant ordinarily has a sequence the same as or highly similar to that of the corresponding allele, and ordinarily has almost the same biological activity, though it rarely has different biological activity. The term “species homolog” or “homolog” as used herein refers to one that has an amino acid or nucleotide homology with a given gene in a given species (preferably at least 60% homology, more preferably at least 80%, at least 85%, at least 90%, and at least 95% homology). A method for obtaining such a species homolog is clearly understood from the description of the present specification. The term “ortholog” (also called orthologous genes) refers to genes in different species derived from a common ancestry (due to speciation). For example, in the case of the hemoglobin gene family having multigene structure, human and mouse α-hemoglobin genes are orthologs, while the human α-hemoglobin gene and the human β-hemoglobin gene are paralogs (genes arising from gene duplication). Orthologs are useful for estimation of molecular phylogenetic trees. Usually, orthologs in different species may have a function similar to that of the original species. Therefore, orthologs of the present invention may be useful in the present invention.

As used herein, the term “conservative (or conservatively modified) variant” applies to both amino acid and nucleic acid sequences. With respect to particular nucleic acid sequences, conservatively modified variants refer to those nucleic acids which encode identical or essentially identical amino acid sequences. Because of the degeneracy of the genetic code, a large number of functionally identical nucleic acids encode any given protein. For example, the codons GCA, GCC, GCG and GCU all encode the amino acid alanine. Thus, at every position where an alanine is specified by a codon, the codon can be altered to any of the corresponding codons described without altering the encoded polypeptide. Such nucleic acid variations are “silent variations” which represent one species of conservatively modified variation. Every nucleic acid sequence herein which encodes a polypeptide also describes every possible silent variation of the nucleic acid. Those skilled in the art will recognize that each codon in a nucleic acid (except AUG, which is ordinarily the only codon for methionine, and TGG, which is ordinarily the only codon for tryptophan) can be modified to yield a functionally identical molecule. Accordingly, each silent variation of a nucleic acid which encodes a polypeptide is implicit in each described sequence. Preferably, such modification may be performed while avoiding substitution of cysteine which is an amino acid capable of largely affecting the higher-order structure of a polypeptide. Examples of a method for such modification of a base sequence include cleavage using a restriction enzyme or the like; ligation or the like by treatment using DNA polymerase, Klenow fragments, DNA ligase, or the like; and a site specific base substitution method using synthesized oligonucleotides (specific-site directed mutagenesis; Mark Zoller and Michael Smith, Methods in Enzymology, 100, 468-500 (1983)). Modification can be performed using methods ordinarily used in the field of molecular biology.

In order to prepare a BAC vector containing a gene encoding a functionally equivalent polypeptide, amino acid additions, deletions, or modifications can be performed in addition to amino acid substitutions. Amino acid substitution(s) refers to the replacement of at least one amino acid of an original peptide chain with different amino acids, such as the replacement of 1 to 10 amino acids, preferably 1 to 5 amino acids, and more preferably 1 to 3 amino acids with different amino acids. Amino acid addition(s) refers to the addition of at least one amino acid to an original peptide chain, such as the addition of 1 to 10 amino acids, preferably 1 to 5 amino acids, and more preferably 1 to 3 amino acids to an original peptide chain. Amino acid deletion(s) refers to the deletion of at least one amino acid, such as the deletion of 1 to 10 amino acids, preferably 1 to 5 amino acids, and more preferably 1 to 3 amino acids. Amino acid modification includes, but is not limited to, amidation, carboxylation, sulfation, halogenation, truncation, lipidation, alkylation, glycosylation, phosphorylation, hydroxylation, acylation (e.g., acetylation), and the like. Amino acids to be substituted or added may be naturally-occurring or nonnaturally-occurring amino acids, or amino acid analogs. Naturally-occurring amino acids are preferable.

As used herein, a nucleic acid form of a polypeptide refers to a nucleic acid molecule capable of expressing a protein form of the polypeptide. This nucleic acid molecule may have a nucleic acid sequence, a part of which is deleted or substituted with another base, or alternatively, into which another nucleic acid sequence is inserted, as long as an expressed polypeptide has substantially the same activity as that of a naturally occurring polypeptide. Alternatively, another nucleic acid may be linked to the 5′ end and/or the 3′ end of the nucleic acid molecule. The nucleic acid molecule may be a nucleic acid molecule which is hybridizable to a gene encoding a polypeptide under stringent conditions and encodes a polypeptide having substantially the same function as that polypeptide. Such a gene is known in the art and is available in the present invention.

Such a nucleic acid can be obtained by a well known PCR technique, or alternatively, can be chemically synthesized. These methods may be combined with, for example, site-specific mutagenesis, hybridization, or the like.

As used herein, the term “substitution, addition or deletion” for a polypeptide or a polynucleotide refers to the substitution, addition or deletion of an amino acid or its substitute, or a nucleotide or its substitute, with respect to the original polypeptide or polynucleotide, respectively. This is achieved by techniques well known in the art, including a site-specific mutagenesis technique and the like. A polypeptide or a polynucleotide may have any number (>0) of substitutions, additions, or deletions. The number can be as large as a variant having such a number of substitutions, additions or deletions which maintains an intended function. For example, such a number may be one or several, and preferably within 20% or 10% of the full length, or no more than 100, no more than 50, no more than 25, or the like.

The structure of polymers (e.g., polypeptide structure) may be described at various levels. This structure is generally described in, for example, Alberts et al., Molecular Biology of the Cell (3rd Ed., 1994), and Cantor and Schimmel, Biophysical Chemistry Part I: The Conformation of Biological Macromolecules (1980). General molecular biological techniques available in the present invention can be easily carried out by the those skilled in the art by referencing Ausubel F. A. et al. eds. (1988), Current Protocols in Molecular Biology, Wiley, New York, N.Y.; Sambrook J. et al., (1987) Molecular Cloning: A Laboratory Manual, 2nd Ed., Cold Spring Harbor Laboratory Press, Cold Spring Harbor, N.Y., or the like.

When mentioning genes in the present specification, “vector” refers to an agent which can transfer a polynucleotide sequence of interest to a target cell. Examples of such a vector include vectors which are capable of self replication or capable of being incorporated into a chromosome within host cells (e.g., prokaryotic cells, yeast, animal cells, plant cells, insect cells, whole animals, and whole plants), and contain a promoter at a site suitable for transcription of a polynucleotide of the present invention.

The term “BAC vector” refers to a plasmid which is produced using F plasmid of E. coli and a vector which can stably maintain and grow a large size DNA fragment of about 300 kb or more in bacteria, such as E. coli and the like. The BAC vector contains at least a region essential for the replication of the BAC vector. Examples of such a region essential for replication include, but are not limited to, the replication origin of F plasmid (oriS) and variants thereof.

As used herein, the term “BAC vector sequence” refers to a sequence comprising a sequence essential for the function of a BAC vector. Optionally, the BAC vector sequence may further comprise a “recombinant protein-dependent recombinant sequence” and/or a “selectable marker”.

As used herein, the term “recombinant” in relation to nucleic acid is used interchangeably with the term “homologous recombination”, and indicates that two different homologous nucleic acid molecules encounter each other, crossover occurs, and a new combination of nucleic acid is generated. As used herein, homologous recombination includes both “recombinant protein-dependent recombination” and “recombinant protein-independent recombination”. The term “recombinant protein-dependent recombination” refers to homologous recombination which occurs in the presence of a recombinant protein, but not in the absence of a recombinant protein. The term “recombinant protein-independent recombination” refers to homologous recombination which occurs irrespective of the presence or absence of a recombinant protein. As used herein, the term “recombinant protein-dependent recombinant sequence” refers to a sequence which causes recombinant protein-dependent recombination. The term “recombinant protein-independent recombinant sequence” refers to a sequence which causes recombinant protein-independent recombination. The recombinant protein-dependent recombinant sequence causes recombination in the presence of a recombinant protein, but not in the absence of a recombinant protein. A recombinant protein preferably acts specifically on a recombinant protein-dependent recombinant sequence, and does not act on sequences other than the recombinant protein-dependent recombinant sequence.

Examples of representative pairs of a recombinant protein-dependent recombinant sequence and a recombinant protein include, but are not limited to: a combination of a bacteriophage P1-derived loxP (locus of crossover of P1) sequence and a Cre (cyclization recombination) protein, a combination of Flp protein and FRT site, a combination of φC31 and attB or attP (Thorpe, Helena M.; Wilson, Stuart E.; Smith, Margaret C. M., Control of directionality in the site-specific recombination system of the Streptomyces phage φC31., Molecular Microbiology (2000), 38(2), 232-241), a combination of resolvase and res site (Sadowski P., Site-specific recombinases: changing partners and doing the twist, J. Bacteriol., February 1986; 165(2) 341-7) (generally, Sauer B., Site-specific recombination: developments and applications., Curr. Opin. Biotechnol., 1994 October; 5(5): 521-7).

As used herein, the term “selectable marker” refers to a gene which functions as an index for selection of a host cell containing a BAC vector. Examples of a selectable marker include, but are not limited to, fluorescent markers, luminescent markers, and drug selectable markers. An example of a “fluorescent marker” is, but is not limited to, a gene encoding a fluorescent protein, such as a green fluorescent protein (GFP). An example of a “luminescent marker” is, but is not limited to, a gene encoding a luminescent protein, such as luciferase. An example of a “drug selectable marker” is, but is not limited to, a gene encoding a protein selected from the group consisting of: dihydrofolate reductase gene, glutamine synthase gene, aspartic acid transaminase, metallothionein (MT), adenosine deaminase (ADA), adenosine deaminase (AMPD1, 2), xanthine-guanine-phosphoribosyl transferase, UMP synthase, P-glycoprotein, asparagine synthase, and ornithine decarboxylase. Examples of a combination of a drug selectable marker and a drug include: a combination of dihydrofolate reductase gene (DHFR) and methotrexate (MTX), a combination of glutamine synthase (GS) gene and methionine sulfoximine (Msx), a combination of aspartic acid transaminase (AST) gene and N-phosphonacetyl-L-aspartate) (PALA), a combination of MT gene and cadmium (Cd2⁺), a combination of adenosine deaminase (ADA) gene and adenosine, alanosine, or 2′-deoxycoformycin, a combination of adenosine deaminase (AMPD1, 2) gene and adenine, azaserine, or coformycin, a combination of xanthine-guanine-phosphoribosyltransferase gene and mycophenolic acid, a combination of UMP synthase gene and 6-azaulysine or pyrazofuran, a combination of P-glycoprotein (P-gp, MDR) gene and multiple drugs, a combination of asparagine synthase (AS) gene and β-aspartyl hydroxamic acid or albizziin, and a combination of ornithine decarboxylase (ODC) gene and β-difluoromethyl-ornithine (DFMO).

As used herein, the term “expression vector” refers to a nucleic acid sequence comprising a structural gene and a promoter for regulating expression thereof, and in addition, various regulatory elements in a state that allows them to operate within host cells. The regulatory element may include, preferably, terminators, selectable markers such as drug-resistance genes (e.g., a kanamycin resistance gene, a hygromycin resistance gene, etc.), and enhancers. It is well known to those skilled in the art that the type of an organism (e.g., a plant) expression vector and the type of a regulatory element may vary depending on the host cell. In the case of plants, a plant expression vector for use in the present invention may further has a T-DNA region. A T-DNA region enhances the efficiency of gene transfer, especially when a plant is transformed using Agrobacterium.

As used herein, the term “recombinant vector” refers to a vector which can transfer a polynucleotide sequence of interest to a target cell. Examples of such a vector include vectors which are capable of self replication or capable of being incorporated into a chromosome within host cells (e.g., prokaryotic cells, yeast, animal cells, plant cells, insect cells, whole animals, and whole plants), and contain a promoter at a site suitable for transcription of a polynucleotide of the present invention.

As used herein, the term “terminator” refers to a sequence which is located downstream of a protein-encoding region of a gene and which is involved in the termination of transcription when DNA is transcribed into mRNA, and the addition of a poly A sequence. It is known that a terminator contributes to the stability of mRNA, and has an influence on the amount of gene expression. Examples of a terminator include, but are not limited to, terminators derived from mammals, the CaMV35S terminator, the terminator of the nopaline synthase gene (Tnos), the terminator of the tobacco PR1a gene, and the like.

As used herein, the term “promoter” refers to a base sequence which determines the initiation site of transcription of a gene and is a DNA region which directly regulates the frequency of transcription. Transcription is started by RNA polymerase binding to a promoter. A promoter region is usually located within about 2 kbp upstream of the first exon of a putative protein coding region. Therefore, it is possible to estimate a promoter region by predicting a protein coding region in a genomic base sequence using DNA analysis software. A putative promoter region is usually located upstream of a structural gene, but depending on the structural gene, i.e., a putative promoter region may be located downstream of a structural gene. Preferably, a putative promoter region is located within about 2 kbp upstream of the translation initiation site of the first exon.

As used herein, the term “constitutive” for expression of a promoter of the present invention refers to a character of the promoter that the promoter is expressed in a substantially constant amount in all tissues of an organism no matter whether the growth stage of the organism is a juvenile phase or a mature phase. Specifically, when Northern blotting analysis is performed under the same conditions as those described in examples of the present specification, expression is considered to be constitutive according to the definition of the present invention if substantially the same amount of expression is observed at the same or corresponding site at any time (e.g., two or more time points (e.g., day 5 and day 15)), for example. Constitutive promoters are considered to play a role in maintaining the homeostasis of organisms in a normal growth environment. These characters can be determined by extracting RNA from any portion of an organism and analyzing the expression amount of the RNA by Northern blotting or quantitating expressed proteins by Western blotting.

An “enhancer” may be used so as to enhance the expression efficiency of a gene of interest. When used in animals, an enhancer region containing an upstream sequence within the SV40 promoter is preferable. One or more enhancers may be used, or no enhancer may be used.

As used herein, the term “operatively linked” indicates that a desired sequence is located such that expression (operation) thereof is under control of a transcription and translation regulatory sequence (e.g., a promoter, an enhancer, and the like) or a translation regulatory sequence. In order for a promoter to be operatively linked to a gene, typically, the promoter is located immediately upstream of the gene. A promoter is not necessarily adjacent to a structural gene.

As used herein, the terms “transformation”, “transduction” and “transfection” are used interchangeably unless otherwise mentioned, and refers to introduction of a nucleic acid into host cells. As a transformation method, any technique for introducing DNA into host cells can be used, including various well-known techniques, such as, for example, the electroporation method, the particle gun method (gene gun), the calcium phosphate method, and the like.

As used herein, the term “transformant” refers to the whole or a part of an organism, such as a cell, which is produced by transformation. Examples of a transformant include prokaryotic cells, yeast, animal cells, plant cells, insect cells and the like. Transformants may be referred to as transformed cells, transformed tissue, transformed hosts, or the like, depending on the subject. As used herein, all of the forms are encompassed, however, a particular form may be specified in a particular context.

Examples of prokaryotic cells include prokaryotic cells of the genera Escherichia, Serratia, Bacillus, Brevibacterium, Corynebacterium, Microbacterium, Pseudomonas, and the like, e.g., Escherichia coli XL1-Blue, Escherichia coli XL2-Blue, Escherichia coli DH1, Escherichia coli MC1000, Escherichia coli KY3276, Escherichia coli W1485, Escherichia coli JM109, Escherichia coli HB101, Escherichia coli No. 49, Escherichia coli W3110, Escherichia coli NY49, Escherichia coli BL21(DE3), Escherichia coli BL21(DE3)pLysS, Escherichia coli HMS174(DE3), Escherichia coli HMS174(DE3)pLysS, Serratia ficaria, Serratia fonticola, Serratia liquefaciens, Serratia marcescens, Bacillus subtilis, Bacillus amyloliquefaciens, Brevibacterium ammmoniagenes, Brevibacterium immariophilum ATCC14068, Brevibacterium saccharolyticum ATCC14066, Corynebacterium glutamicum ATCC13032, Corynebacterium glutamicum ATCC14067, Corynebacterium glutamicum ATCC13869, Corynebacterium acetoacidophilum ATCC13870, Microbacterium ammoniaphilum ATCC15354, Pseudomonas sp. D-0110, and the like.

Examples of animal cells include cord blood mononuclear cells, peripheral blood mononuclear cells, Sup-T1 cells, and the like.

The term “animal” is used herein in its broadest sense and refers to vertebrates and invertebrates (e.g., arthropods). Examples of animals include, but are not limited to, any of the class Mammalia, the class Ayes, the class Reptilia, the class Amphibia, the class Pisces, the class Insecta, the class Vermes, and the like.

As used herein, the term “tissue” in relation to organisms refers to an aggregate of cells having substantially the same function. Therefore, a tissue may be a part of an organ. Organs usually have cells having the same function, and may have coexisting cells having slightly different functions. Therefore, as used herein, tissues may have various kinds of cells as long as a certain property is shared by the cells.

As used herein, the term “organ” refers to a structure which has a single independent form and in which one or more tissues are associated together to perform a specific function. In plants, examples of organs include, but are not limited to, callus, root, stem, trunk, leaf, flower, seed, embryo bud, embryo, fruit, and the like. In animals, examples of organs include, but are not limited to, stomach, liver, intestine, pancreas, lung, airway, nose, heart, artery, vein, lymph node (lymphatic system), thymus, ovary, eye, ear, tongue, skin, and the like.

As used herein, the term “transgenic” refers to incorporation of a specific gene into an organism (e.g., plants or animals (mice, etc.)) or such an organism having an incorporated gene.

When organisms of the present invention are animals, the transgenic organisms can be produced by a microinjection method (a trace amount injection method), a viral vector method, an embryonic stem (ES) cell method, a sperm vector method, a chromosome fragment introducing method (transsomic method), an episome method, or the like. These transgenic animal producing techniques are well known in the art.

As used herein, the term “screening” refers to selection of a substance, a host cell, a virus, or the like having a given specific property of interest from a number of candidates using a specific operation/evaluation method. It will be understood that the present invention encompasses viruses having desired activity obtained by screening.

As used herein, the terms “chip” or “microchip” are used interchangeably to refer to a micro integrated circuit which has versatile functions and constitutes a portion of a system. Examples of a chip include, but are not limited to, DNA chips, protein chips, and the like.

As used herein, the term “array” refers to a substrate (e.g., a chip, etc.) which has a pattern of a composition containing at least one (e.g., 1000 or more, etc.) target substances (e.g., DNA, proteins, transfection mixtures, etc.), which are arrayed. Among arrays, patterned substrates having a small size (e.g., 10×10 mm, etc.) are particularly referred to as microarrays. The terms “microarray” and “array” are used interchangeably. Therefore, a patterned substrate having a larger size than that which is described above may be referred to as a microarray. For example, an array comprises a set of desired transfection mixtures fixed to a solid phase surface or a film thereof. An array preferably comprises at least 10² antibodies of the same or different types, more preferably at least 10³, even more preferably at least 10⁴, and still even more preferably at least 10⁵. These antibodies are placed on a surface of up to 125×80 mm, more preferably 10×10 mm. An array includes, but is not limited to, a 96-well microtiter plate, a 384-well microtiter plate, a microtiter plate the size of a glass slide, and the like. A composition to be fixed may contain one or a plurality of types of target substances. Such a number of target substance types may be in the range of from one to the number of spots, including, without limitation, about 10, about 100, about 500, and about 1,000.

As described above, any number of target substances (e.g., proteins, such as antibodies) may be provided on a solid phase surface or film, typically including no more than 10⁸ biological molecules per substrate, in another embodiment no more than 10⁷ biological molecules, no more than 10⁶ biological molecules, no more than 10⁵ biological molecules, no more than 10⁴ biological molecules, no more than 10³ biological molecules, or no more than 10² biological molecules. A composition containing more than 10⁸ biological molecule target substances may be provided on a substrate. In these cases, the size of a substrate is preferably small. Particularly, the size of a spot of a composition containing target substances (e.g., proteins such as antibodies) may be as small as the size of a single biological molecule (e.g., 1 to 2 nm order). In some cases, the minimum area of a substrate may be determined based on the number of biological molecules on a substrate.

“Spots” of biological molecules may be provided on an array. As used herein, the term “spot” refers to a certain set of compositions containing target substances. As used herein, the term “spotting” refers to an act of preparing a spot of a composition containing a certain target substance on a substrate or plate. Spotting may be performed by any method, for example, pipetting or the like, or alternatively, using an automatic device. These methods are well known in the art.

As used herein, the term “address” refers to a unique position on a substrate, which may be distinguished from other unique positions. Addresses are appropriately associated with spots. Addresses can have any distinguishable shape such that substances at each address may be distinguished from substances at other addresses (e.g., optically). A shape defining an address may be, for example, without limitation, a circle, an ellipse, a square, a rectangle, or an irregular shape. Therefore, the term “address” is used to indicate an abstract concept, while the term “spot” is used to indicate a specific concept. Unless it is necessary to distinguish them from each other, the terms “address” and “spot” may be herein used interchangeably.

The size of each address particularly depends on the size of the substrate, the number of addresses on the substrate, the amount of a composition containing target substances and/or available reagents, the size of microparticles, and the level of resolution required for any method used for the array. The size of each address may be, for example, in the range of from 1-2 nm to several centimeters, though the address may have any size suited to an array.

The spatial arrangement and shape which define an address are designed so that the microarray is suited to a particular application. Addresses may be densely arranged or sparsely distributed, or subgrouped into a desired pattern appropriate for a particular type of material to be analyzed.

As used herein, the term “support” refers to a material which can carry cells, bacteria, viruses, polynucleotides, or polypeptides. Such a support may be made from any solid material which has a capability of binding to a biological molecule as used herein via covalent or noncovalent bond, or which may be induced to have such a capability.

Examples of materials used for supports include any material capable of forming a solid surface, such as, without limitation, glass, silica, silicon, ceramics, silicon dioxide, plastics, metals (including alloys), naturally-occurring and synthetic polymers (e.g., polystyrene, cellulose, chitosan, dextran, and nylon), and the like. Preferably, a support comprises a portion for producing hydrophobic bonds. A support may be formed of layers made of a plurality of materials. For example, a support may be made of an inorganic insulating material, such as glass, quartz glass, alumina, sapphire, forsterite, silicon oxide, silicon carbide, silicon nitride, or the like. A support may be made of an organic material, such as polyethylene, ethylene, polypropylene, polyisobutylene, polyethylene terephthalate, unsaturated polyester, fluorine-containing resin, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyvinyl alcohol, polyvinyl acetal, acrylic resin, polyacrylonitrile, polystyrene, acetal resin, polycarbonate, polyamide, phenol resin, urea resin, epoxy resin, melamine resin, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene copolymer, silicone resin, polyphenylene oxide, polysulfone, and the like. Alternatively, nitrocellulose film, nylon film, PVDF film, or the like, which are used in blotting, may be used as a material for a support.

The herpesvirus of the present invention can be used as an ingredient of a pharmaceutical composition for the treatment, prevention, and/or therapy of infectious diseases.

As used herein, the term “effective amount” in relation to a drug refers to an amount which causes the drug to exhibit intended efficacy. As used herein, an effective amount corresponding to a smallest concentration may be referred to as a minimum effective amount. Such a minimum effective amount is well known in the art. Typically, the minimum effective amount of a drug has been determined or can be determined as appropriate by those skilled in the art. The determination of such an effective amount can be achieved by actual administration, use of an animal model, or the like. The present invention is also useful for the determination of such an effective amount.

As used herein, the term “pharmaceutically acceptable carrier” refers to a material which is used for production of a pharmaceutical agent or an agricultural chemical (e.g., an animal drug), and has no adverse effect on effective ingredients. Examples of such a pharmaceutically acceptable carrier include, but are not limited to: antioxidants, preservatives, colorants, flavoring agents, diluents, emulsifiers, suspending agents, solvents, fillers, bulking agents, buffers, delivery vehicles, excipients, and/or agricultural or pharmaceutical adjuvants.

The type and amount of a pharmaceutical agent used in the treatment method of the present invention can be easily determined by those skilled in the art based on information obtained by the method of the present invention (e.g., information relating to a disease) in view of the purpose of use, the target disease (type, severity, etc.), the subject's age, size, sex, and case history, the morphology and type of a site of a subject of administration, or the like. The frequency of subjecting a subject (patient) to the monitoring method of the present invention is also easily determined by those skilled in the art with respect to the purpose of use, the target disease (type, severity, etc.), the subject's age, size, sex, and case history, the progression of the therapy, and the like. Examples of the frequency of monitoring the state of a disease include once per day to once per several months (e.g., once per week to once per month). Preferably, monitoring is performed once per week to once per month with reference to the progression.

As used herein, the term “instructions” refers to a description of the method of the present invention for a person who performs administration, such as a medical doctor, a patient, or the like. Instructions state when to administer a medicament of the present invention, such as immediately after or before radiation therapy (e.g., within 24 hours, etc.). The instructions are prepared in accordance with a format defined by an authority of a country in which the present invention is practiced (e.g., Health, Labor and Welfare Ministry in Japan, Food and Drug Administration (FDA) in the U.S., and the like), explicitly describing that the instructions are approved by the authority. The instructions are so-called package insert and are typically provided in paper media. The instructions are not so limited and may be provided in the form of electronic media (e.g., web sites, electronic mails, and the like provided on the Internet).

In a therapy of the present invention, two or more pharmaceutical agents may be used as required. When two or more pharmaceutical agents are used, these agents may have similar properties or may be derived from similar origins, or alternatively, may have different properties or may be derived from different origins. A method of the present invention can be used to obtain information about the drug resistance level of a method of administering two or more pharmaceutical agents.

In the present invention, it will be appreciated by those skilled in the art that once the analysis result of a certain sugar chain structure has been correlated with a level of a disease concerning a similar type of organism, culture cell, tissue, animal (e.g., a mouse for a human) or the like, a corresponding sugar chain structure can be correlated with the disease level. Such matters are described and supported in, for example, “Doubutsu Baiyosaibo Manuaru (Animal Culture Cell Manual), Seno et al. eds., Kyoritsu shuppan, 1993, the entirety of which is hereby incorporated by reference.

(General Techniques Used Herein)

Techniques used herein are within the technical scope of the present invention unless otherwise specified. These techniques are commonly used in the fields of sugar chain science, fluidics, micromachining, organic chemistry, biochemistry, genetic engineering, molecular biology, microbiology, genetics, and their relevant fields. The techniques are well described in documents described below and the documents mentioned herein elsewhere.

Micromachining is described in, for example, Campbell, S. A. (1996), The Science and Engineering of Microelectronic Fabrication, Oxford University Press; Zaut, P. V. (1996), Micromicroarray Fabrication: a Practical Guide to Semiconductor Processing, Semiconductor Services; Madou, M. J. (1997), Fundamentals of Microfabrication, CRC1 5 Press; Rai-Choudhury, P. (1997), Handbook of Microlithography, Micromachining & Microfabrication: Microlithography; and the like, the relevant portions of which are hereby incorporated by reference.

Molecular biology techniques, biochemistry techniques, and microbiology techniques used herein are well known and commonly used in the art, and are described in, for example, Maniatis, T. et al. (1989), Molecular Cloning: A Laboratory Manual, Cold Spring Harbor and its 3rd Ed. (2001); Ausubel, F. M. et al. eds, Current Protocols in Molecular Biology, John Wiley & Sons Inc., NY, 10158 (2000); Innis, M. A. (1990), PCR Protocols: A Guide to Methods and Applications, Academic Press; Innis, M. A. et al. (1995), PCR Strategies, Academic Press; Sninsky, J. J. et al. (1999), PCR Applications: Protocols for Functional Genomics, Academic Press; Gait, M. J. (1985), Oligonucleotide Synthesis: A Practical Approach, IRL Press; Gait, M. J. (1990), Oligonucleotide Synthesis: A Practical Approach, IRL Press; Eckstein, F. (1991), Oligonucleotides and Analogues: A Practical Approach, IRL Press; Adams, R. L. et al. (1992), The Biochemistry of the Nucleic Acids, Chapman & Hall; Shabarova, Z. et al. (1994), Advanced Organic Chemistry of Nucleic Acids, Weinheim; Blackburn, G. M. et al. (1996), Nucleic Acids in Chemistry and Biology, Oxford University Press; Hermanson, G. T. (1996), Bioconjugate Techniques, Academic Press; Method in Enzymology 230, 242, 247, Academic Press, 1994; Special issue, Jikken Igaku (Experimental Medicine) “Idenshi Donyu & Hatsugenkaiseki Jikkenho (Experimental Method for Gene introduction & Expression Analysis)”, Yodo-sha, 1997; and the like. Relevant portions (or possibly the entirety) of each of these publications are herein incorporated by reference.

DESCRIPTION OF PREFERRED EMBODIMENTS

Hereinafter, the present invention will be described by way of embodiments. Embodiments described below are provided only for illustrative purposes. Accordingly, the scope of the present invention is not limited by the embodiments except as by the appended claims. It will be clearly appreciated by those skilled in the art that variations and modifications can be made without departing from the scope of the present invention with reference to the specification.

According to an aspect of the present invention, a recombinant herpesvirus is provided. Preferably, the herpesvirus contains a BAC vector sequence in its genome sequence. By constructing a herpesvirus genome containing a BAC vector sequence, it becomes possible to handle the herpesvirus genome as the BAC molecule in bacteria. A BAC vector sequence used herein preferably contains an origin of replication derived from F plasmid, or alternatively may contain any origin of replication other than an origin of replication derived from F plasmid, as long as it has a sequence of 300 kb or more and can be held and grown as a bacterial artificial sequence in bacterial cells. The BAC vector of the present invention can be maintained and/or grow in bacterial host cells, preferably E. coli cells. Preferably, a portion of the BAC vector is inserted into a non-essential region of a herpesvirus genome, so that it is possible to manipulate it as a BAC containing the herpesvirus genome. When the BAC containing the herpesvirus genome is introduced into a mammalian cell, the recombinant herpesvirus can be produced and grown. As a host cell for the recombinant herpesvirus, any mammalian cell which can grow a wild-type herpesvirus strain can be used. Preferably, such a host cell is derived from a human, including, for example, but being not limited to, cord blood mononuclear cells, peripheral blood mononuclear cells, and SupT1 cells.

(Method for Producing a BAC Vector Containing a Human Herpesvirus Genome)

Various techniques (e.g., a technique using homologous recombination) can be used to produce a BAC vector containing a human herpesvirus by using a human herpesvirus (e.g., HHV-6A, HHV-6B, or HHV-7) genome and a BAC vector.

An example of the technique using homologous recombination is a technique using a nucleic acid having a linear BAC vector sequence linked with a sequence homologous to a human herpesvirus genome.

A method for producing a BAC vector comprising a human herpesvirus genome by using a nucleic acid having a linear BAC vector sequence linked with a sequence homologous to a human herpesvirus genome representatively comprises the steps of: (1) introducing the nucleic acid along with the human herpesvirus genome into appropriate hosts; (2) culturing the host cells to elicit homologous recombination between the homologous sequence linked with the linear BAC vector sequence and the human herpesvirus genome sequence; (3) screening the host cells for one which contains the human herpesvirus genome sequence having the BAC vector sequence incorporated due to the homologous recombination; (4) culturing the host cell and extracting a circular virus DNA. Examples of a host cell used in the above-described method include, but are not limited to, cord blood mononuclear cells, peripheral blood mononuclear cells, and SupT1 cells.

Examples of a technique for introducing a BAC vector into mammalian hosts include, but are not limited to, the calcium phosphate method, the electroporation method, and the lipofection method. By the electroporation method of Amaxa or Bio-Rad, a large amount of genes can be efficiently introduced into T cells. For example, the electroporation method of Amaxa is performed under the following conditions. For example, cells are washed with cell wash buffer solution (RPMI-1640 medium without fetal calf serum) twice. Thereafter, the cells are suspended in electroporation buffer solution (Nucleofector slution supplied by the manufacture). 1 μg of plasmid DNA is added to the cell suspension, mixed well, and placed in a cuvette. Electroporation is performed at room temperature using an appropriate program.

Alternatively, in order to produce a BAC containing a human herpesvirus genome using a human herpesvirus genome and a BAC sequence, various methods, such as use of nucleic acid fragments obtained using restriction enzymes or the like, can be employed instead of homologous recombination.

A non-essential region of the HHV-7 genome for introducing a BAC vector sequence thereinto selected from the group consisting of: a region within the ORF of gene H1, a region within the ORF of gene DR1, a region within the ORF of gene DR2, a region within the ORF of gene H2, a region within the ORF of gene DR6, a region within the ORF of gene DR7, a region within the ORF of gene H3, a region within the ORF of gene H4, a region within the ORF of gene U2, a region within the ORF of gene U3, a region within the ORF of gene U4, a region within the ORF of gene U5/7, a region within the ORF of gene U8, a region within the ORF of gene U10, a region within the ORF of gene U12, a region within the ORF of gene U13, a region within the ORF of gene U15, a region within the ORF of gene U16, a region within the ORF of gene U17Ex, a region within the ORF of gene U17, a region within the ORF of gene U17a, a region within the ORF of gene U18, a region within the ORF of gene U19, a region within the ORF of gene U20, a region within the ORF of gene U21, a region within the ORF of gene U23, a region within the ORF of gene U24, a region within the ORF of gene U24a, a region within the ORF of gene U25, a region within the ORF of gene U26, a region within the ORF of gene U28, a region within the ORF of gene U32, a region within the ORF of gene U33, a region within the ORF of gene U34, a region within the ORF of gene U35, a region within the ORF of gene U36, a region within the ORF of gene U37, a region within the ORF of gene U40, a region within the ORF of gene U42, a region within the ORF of gene U44, a region within the ORF of gene U45, a region within the ORF of gene U46, a region within the ORF of gene U47, a region within the ORF of gene U49, a region within the ORF of gene U50, a region within the ORF of gene U51, a region within the ORF of gene U52, a region within the ORF of gene U55A, a region within the ORF of gene U55B, a region within the ORF of gene U58, a region within the ORF of gene U59, a region within the ORF of gene U62, a region within the ORF of gene U63, a region within the ORF of gene U64, a region within the ORF of gene U65, a region within the ORF of gene U67, a region within the ORF of gene U68, a region within the ORF of gene U69, a region within the ORF of gene U70, a region within the ORF of gene U71, a region within the ORF of gene U75, a region within the ORF of gene U76, a region within the ORF of gene H5, a region within the ORF of gene U79, a region within the ORF of gene H6, a region within the ORF of gene U80, a region within the ORF of gene U81, a region within the ORF of gene U84, a region within the ORF of gene U85, a region within the ORF of gene U91, a region within the ORF of gene H7, a region within the ORF of gene U95, a region within the ORF of gene H8, a region flanking the ORF of gene H1, a region flanking the ORF of gene DR1, a region flanking the ORF of gene DR2, a region flanking the ORF of gene H2, a region flanking the ORF of gene DR6, a region flanking the ORF of gene DR7, a region flanking the ORF of gene H3, a region flanking the ORF of gene H4, a region flanking the ORF of gene U2, a region flanking the ORF of gene U3, a region flanking the ORF of gene U4, a region flanking the ORF of gene U5/7, a region flanking the ORF of gene U8, a region flanking the ORF of gene U10, a region flanking the ORF of gene U12, a region flanking the ORF of gene U13, a region flanking the ORF of gene U15, a region flanking the ORF of gene U16, a region flanking the ORF of gene U17Ex, a region flanking the ORF of gene U17, a region flanking the ORF of gene U17a, a region flanking the ORF of gene U18, a region flanking the ORF of gene U19, a region flanking the ORF of gene U20, a region flanking the ORF of gene U21, a region flanking the ORF of gene U23, a region flanking the ORF of gene U24, a region flanking the ORF of gene U24a, a region flanking the ORF of gene U25, a region flanking the ORF of gene U26, a region flanking the ORE of gene U28, a region flanking the ORF of gene U32, a region flanking the ORF of gene U33, a region flanking the ORF of gene U34, a region flanking the ORF of gene U35, a region flanking the ORF of gene U36, a region flanking the ORF of gene U37, a region flanking the ORF of gene U40, a region flanking the ORF of gene U42, a region flanking the ORF of gene U44, a region flanking the ORF of gene U45, a region flanking the ORF of gene U46, a region flanking the ORF of gene U47, a region flanking the ORF of gene U49, a region flanking the ORF of gene U50, a region flanking the ORF of gene U51, a region flanking the ORF of gene U52, a region flanking the ORF of gene U55A, a region flanking the ORF of gene U55B, a region flanking the ORF of gene U58, a region flanking the ORF of gene U59, a region flanking the ORF of gene U62, a region flanking the ORF of gene U63, a region flanking the ORF of gene U64, a region flanking the ORF of gene U65, a region flanking the ORF of gene U67, a region flanking the ORF of gene U68, a region flanking the ORF of gene U69, a region flanking the ORF of gene U70, a region flanking the ORF of gene U71, a region flanking the ORF of gene U75, a region flanking the ORF of gene U76, a region flanking the ORF of gene H5, a region flanking the ORF of gene U79, a region flanking the ORF of gene H6, a region flanking the ORF of gene U80, a region flanking the ORF of gene U81, a region flanking the ORF of gene U84, a region flanking the ORF of gene U85, a region flanking the ORF of gene U91, a region flanking the ORF of gene H7, a region flanking the ORF of gene U95, and a region flanking the ORF of gene H8.

Preferably non-essential regions in HHV-7 are ORF regions of gene U24, gene U24a, gene U25, and gene U26, or regions flanking these ORF's. This is because gene U24, gene U24a, gene U25, and gene U26 are contiguous non-essential genes on the HHV-7 genome, so that it is easy to design a nucleic acid for homologous recombination.

A BAC vector sequence used in the present invention preferably includes a recombinant protein-dependent recombinant sequence and/or a selectable marker. Preferably, the selectable marker sequence is a drug selectable marker and/or a gene encoding a green fluorescent protein. This is because the presence of a desired gene can be easily confirmed.

According to another aspect of the present invention, a vector used for production of the above-described virus and a method for producing the above-described virus are provided. According to still another aspect of the present invention, a pharmaceutical composition comprising the above-described virus and a pharmaceutical composition in the form of a vaccine are provided.

The recombinant human herpesvirus of the present invention can be used to introduce a desired antigen protein. Therefore, for example, when an antigen which is known to function as a vaccine is introduced, the vector of the present invention can be used as a vaccine vector.

According to still another aspect of the present invention, a method for introducing mutation into a vector for producing a vaccine of the present invention is provided. The method comprises the steps of: introducing a vector into a bacterial host cell; introducing a plasmid vector containing a fragment consisting of a portion of a human herpesvirus genome into the bacterial host cell, wherein the fragment has at least one mutation; culturing the bacterial host cell; and isolating a vector having a BAC vector sequence from the cultured bacterial host cell. In the above-described method, homologous recombination occurs between the vector for producing a vaccine of the present invention and the plasmid vector containing the fragment consisting of the portion of the human herpesvirus genome, in bacterial host cells. As a result, the vector for producing the vaccine of the present invention has a mutation in the fragment consisting of the portion of the human herpesvirus genome.

In the above-described method, the step of introducing the vector into bacterial host cells can be achieved by using various well-known methods, such as electroporation and the like. Similarly, the plasmid vector containing the fragment consisting of the portion of the human herpesvirus genome can be introduced into bacterial host cells. As a technique for introducing a mutation into the fragment, a technique for introducing a mutation by using PCR is well known. For example, by using heat-resistant polymerase having no proofreading function, where one of the four nucleotides is in lower quantity, it is possible to introduce a mutation randomly. Alternatively, by PCR using a primer having a mutated base sequence, it is possible to introduce a desired mutation into a desired site. When the bacterial cell is cultured, homologous recombination occurs between the vector for producing the vaccine of the present invention and the plasmid vector containing the fragment consisting of the portion of the human herpesvirus genome. As a result, the vector for producing the vaccine of the present invention has a mutation in the fragment consisting of the portion of the human herpesvirus genome. In order to prepare a BAC vector sequence from a bacterial host cell, various well-known techniques (e.g., the alkaline method, etc.) and commercially available kits can be used.

According to another aspect of the present invention, another method for introducing a mutation into a vector for producing the vaccine of the present invention is provided. The method comprises the steps of: introducing the vector into a bacterial host cell; introducing a first plasmid vector containing a first fragment consisting of a portion of a human herpesvirus genome into the bacterial host cell, wherein the first fragment has at least one mutation; introducing a second plasmid vector containing a second fragment consisting of a portion of the human herpesvirus genome into the bacterial host cell, wherein the second fragment has at least one mutation and the second fragment is different from the first fragment; culturing the bacterial host cell; and isolating a vector having a BAC vector sequence from the cultured bacterial host cell.

According to an aspect of the present invention, a nucleic acid cassette which may be used for producing the vaccine of the present invention, is provided. The nucleic acid cassette preferably comprises a first fragment capable of homologous recombination with a human herpesvirus genome in a host cell, a BAC vector sequence, and a second fragment capable of homologous recombination with a human herpesvirus genome in the host cell, wherein the opposite ends of the BAC sequence are linked with the first fragment and second fragments, respectively. In this case, the first fragment and the second fragment are preferably at least 1 kb, at least 1.5 kb, or at least 2 kb in length. The first fragment and the second fragment preferably has at least 80% identity, at least 85% identity, at least 90% identity, or at least 95% identity to the human herpesvirus genome sequence.

Preferably, the first and second fragments are derived from different regions of the human herpesvirus genome. The first and second fragments may be independently derived from a region flanking the ORF of gene U24 or a region flanking the ORF of gene U24a. Preferably, the BAC vector sequence comprises a recombinant protein-dependent recombinant sequence and/or a selectable marker in order to control homologous recombination and easily detect a desired gene. The selectable marker may be either a drug selectable marker or a gene encoding a fluorescent protein (e.g., a green fluorescent protein, etc.). Representatively, the BAC vector sequence has a nucleic acid sequence set forth in SEQ ID NO.: 401.

In the case of HHV-7, preferably, the first and second fragments are independently derived from regions selected from the group consisting of the following regions of the HHV-7 genome, or independently have at least 80%, 85%, 90%, or 95% identity to regions selected from the group consisting of the following regions of the HHV-7 genome: a region within the ORF of gene H1, a region within the ORF of gene DR1, a region within the ORF of gene DR2, a region within the ORF of gene H2, a region within the ORF of gene DR6, a region within the ORF of gene DR7, a region within the ORF of gene H3, a region within the ORF of gene H4, a region within the ORE of gene U2, a region within the ORF of gene U3, a region within the ORF of gene U4, a region within the ORF of gene U5/7, a region within the ORF of gene U8, a region within the ORF of gene U10, a region within the ORF of gene U12, a region within the ORF of gene U13, a region within the ORF of gene U15, a region within the ORF of gene U16, a region within the ORF of gene U17Ex, a region within the ORF of gene U17, a region within the ORF of gene U17a, a region within the ORF of gene U18, a region within the ORF of gene U19, a region within the ORF of gene U20, a region within the ORF of gene U21, a region within the ORF of gene U23, a region within the ORF of gene U24, a region within the ORF of gene U24a, a region within the ORF of gene U25, a region within the ORF of gene U26, a region within the ORF of gene U28, a region within the ORF of gene U32, a region within the ORF of gene U33, a region within the ORF of gene U34, a region within the ORF of gene U35, a region within the ORF of gene U36, a region within the ORF of gene U37, a region within the ORF of gene U40, a region within the ORF of gene U42, a region within the ORF of gene U44, a region within the ORF of gene U45, a region within the ORF of gene U46, a region within the ORF of gene U47, a region within the ORF of gene U49, a region within the ORF of gene U50, a region within the ORF of gene U51, a region within the ORF of gene U52, a region within the ORF of gene U55A, a region within the ORF of gene U55B, a region within the ORF of gene U58, a region within the ORF of gene U59, a region within the ORF of gene U62, a region within the ORF of gene U63, a region within the ORF of gene U64, a region within the ORF of gene U65, a region within the ORF of gene U67, a region within the ORF of gene U68, a region within the ORF of gene U69, a region within the ORF of gene U70, a region within the ORF of gene U71, a region within the ORF of gene U75, a region within the ORF of gene U76, a region within the ORF of gene H5, a region within the ORF of gene U79, a region within the ORF of gene H6, a region within the ORF of gene U80, a region within the ORF of gene U81, a region within the ORF of gene U84, a region within the ORF of gene U85, a region within the ORF of gene U91, a region within the ORF of gene H7, a region within the ORF of gene U95, a region within the ORF of gene H8, a region flanking the ORF of gene H1, a region flanking the ORF of gene DR1, a region flanking the ORF of gene DR2, a region flanking the ORF of gene H2, a region flanking the ORF of gene DR6, a region flanking the ORF of gene DR7, a region flanking the ORF of gene H3, a region flanking the ORF of gene H4, a region flanking the ORF of gene U2, a region flanking the ORF of gene U3, a region flanking the ORF of gene U4, a region flanking the ORF of gene U5/7, a region flanking the ORF of gene U8, a region flanking the ORF of gene U10, a region flanking the ORF of gene U12, a region flanking the ORF of gene U13, a region flanking the ORF of gene U15, a region flanking the ORF of gene U16, a region flanking the ORF of gene U17Ex, a region flanking the ORF of gene U17, a region flanking the ORF of gene U17a, a region flanking the ORF of gene U18, a region flanking the ORF of gene U19, a region flanking the ORF of gene U20, a region flanking the ORF of gene U21, a region flanking the ORF of gene U23, a region flanking the ORF of gene U24, a region flanking the ORF of gene U24a, a region flanking the ORF of gene U25, a region flanking the ORF of gene U26, a region flanking the ORF of gene U28, a region flanking the ORF of gene U32, a region flanking the ORF of gene U33, a region flanking the ORF of gene U34, a region flanking the ORF of gene U35, a region flanking the ORF of gene U36, a region flanking the ORF of gene U37, a region flanking the ORF of gene U40, a region flanking the ORF of gene U42, a region flanking the ORF of gene U44, a region flanking the ORF of gene U45, a region flanking the ORF of gene U46, a region flanking the ORF of gene U47, a region flanking the ORF of gene U49, a region flanking the ORF of gene U50, a region flanking the ORF of gene U51, a region flanking the ORF of gene U52, a region flanking the ORF of gene U55A, a region flanking the ORF of gene U55B, a region flanking the ORF of gene U58, a region flanking the ORF of gene U59, a region flanking the ORF of gene U62, a region flanking the ORF of gene U63, a region flanking the ORF of gene U64, a region flanking the ORF of gene U65, a region flanking the ORF of gene U67, a region flanking the ORF of gene U68, a region flanking the ORF of gene U69, a region flanking the ORF of gene U70, a region flanking the ORF of gene U71, a region flanking the ORF of gene U75, a region flanking the ORF of gene U76, a region flanking the ORF of gene H5, a region flanking the ORF of gene U79, a region flanking the ORF of gene H6, a region flanking the ORF of gene U80, a region flanking the ORF of gene U81, a region flanking the ORF of gene U84, a region flanking the ORF of gene U85, a region flanking the ORF of gene U91, a region flanking the ORF of gene H7, a region flanking the ORF of gene U95, and a region flanking the ORF of gene H8.

Preferably, the first and second fragments are derived from different regions of the human herpesvirus genome. The first and second fragments may be independently derived from a region flanking the ORF of gene U24 or a region flanking the ORF of gene U24a. Preferably, the BAC vector sequence comprises a recombinant protein-dependent recombinant sequence and/or a selectable marker in order to control homologous recombination and easily detect a desired gene. The selectable marker may be either a drug selectable marker or a gene encoding a fluorescent protein (e.g., a green fluorescent protein, etc.). Representatively, the BAC vector sequence has a nucleic acid sequence set forth in SEQ ID NO.: 401.

(Preparation of Recombinant Herpesvirus Containing a Foreign Gene)

A method of the present invention can be used to easily prepare a herpesvirus having a herpesvirus genome into which a foreign gene is introduced.

Such mutation introduction can be performed by using a method described below regarding, for example, HHV-7.

Into E. coli, (a) HHV-7-U21-27-BAC plasmid (a plasmid containing the HHV-7 genome and a BAC vector sequence) and (b) a nucleic acid encoding a mutated foreign gene (e.g., a shuttle vector or a PCR product) having a desired foreign gene and partial sequences of a herpesvirus genome linked with the opposite ends of the foreign gene, are introduced. Homologous recombination is allowed to occur between HHV-7-U21-27-BAC plasmid and the shuttle vector or PCR product, so that a foreign gene mutation can be introduced into HHV-7-U21-27-BAC plasmid. Alternatively, a transposon can be used to randomly introduce a mutation into a desired nucleic acid sequence. The HHV-7-U21-27-BAC plasmid into which the foreign gene has been introduced, can be easily selected and grown in E. coli. By causing HHV-7-U21-27-BAC having the foreign gene to produce a virus, the recombinant herpesvirus can be obtained (Markus Wagner, TRENDS in Microbiology, Vol. 10, No. 7, July 2002). Specific examples will be described below.

(1) Use of a Temperature Sensitive Shuttle Vector Containing a Foreign Gene Nucleic Acid:

Firstly, the shuttle vector and HHV-7-U21-27-BAC plasmid are allowed to recombine via a first homologous region to generate a cointegrate in which the shuttle vector is linked with HHV-7-U21-27-BAC plasmid. Next, since the replication origin of the shuttle vector is temperature-sensitive, the shuttle plasmid is removed. In a second recombination event, the cointegrated portion is removed. When the second recombination event occurs via the first homologous region, a plasmid having the same sequence as that of HHV-7-U21-27-BAC used for the recombination is generated. In contrast, when the second recombination event occurs via a second homologous region different from the first homologous region, a modified HHV-7-U21-27-BAC plasmid having the foreign gene contained in the shuttle vector is obtained. When the first homologous region and the second homologous region have substantially the same length, the probability that the second recombination event occurs in the second homologous region is substantially the same as the probability that the second recombination event occurs in the first homologous region. Therefore, about half of the resultant HHV-7-U21-27-BAC plasmids are plasmids having the same sequence as that which has been used in the recombination, while about half thereof are plasmids having the foreign gene which has been introduced into the shuttle vector.

(2) Use of a Linear DNA Fragment:

In this method, for example, by utilizing the recombination function of recET derived from prophage Rac or the recombination function of redαβ derived from bacteriophage λ, a linear DNA fragment is used to introduce a mutation into a circular HHV-7-U21-27-BAC molecule. Specifically, a selectable marker flanking a target sequence and a linear DNA fragment containing a homologous sequence are introduced along with HHV-7-U21-27-BAC into E. coli capable of homologous recombination. In order to avoid the degradation of the linear DNA within E. coli, it is preferable to use E. coli lacking exonuclease or cause expression of redγ (gam) which is an exonuclease inhibitor derived from a bacteriophage. The linear DNA has a region homologous to HHV-7-U21-27-BAC plasmid on the opposite ends thereof. Homologous recombination occurs via the homologous region, thereby making it possible to introduce a desired sequence of the linear DNA fragment into HHV-7-U21-27-BAC. RecET and redαβ exhibit homologous recombination via a homologous sequence having a length of about 25 to 50 nucleotides. Therefore, the recombination functions of recET and redαβ can be used more easily than recA-mediated homologous recombination.

(3) Use of a Transposon:

The function of a transposon element to insert into a nucleic acid in E. coli is used. For example, a transposon element containing a desired foreign gene and HHV-7-U21-27-BAC are introduced into E. coli so that the transposon element is randomly inserted into HHV-7-U21-27-BAC. Thereby, HHV-7-U21-27-BAC having the inserted foreign gene is obtained.

The above-described method for preparing recombinant HHV-7 containing a foreign gene can be applied to HHV-6.

(Effect of HIV Therapy Using the Recombinant HHV-7 of the Present Invention (Prevention of Infection))

HIV infects CD4⁺ T cells. It is known that HIV infection is prevented or healed by the treatment of CD4⁺ T cells with HHV-7 (Lusso et al., Proc. Natl. Acad. Sci. USA, vol. 91, 3872-3876, April 1994). This therapeutic effect is achieved by HHV-7 infecting CD4⁺ T cells via the CD4 receptor on the T cells. Therefore, recombinant HHV-7 which has infectious capacity to CD4⁺ T cells can be prepared by a method of the present invention and can be used for the prevention and/or therapy of HIV infection.

The HIV infection preventing effect of HHV-7 of the present invention can be measured by determining whether or not HHV-7 prevents the growth of HIV in target cells. Examples of target cells used for measurement include, but are not limited to, peripheral blood mononuclear cells, CD4⁺ cells, SupT1 cells, and the like. More specifically, for example, measurement can be performed as follows.

Target cells are previously infected with HHV-7 at a multiplicity of infection (MOI) of 0.1, followed by culturing at 37° C. for 24 to 72 hours. Thereafter, HIV is added, followed by incubation for 30 minutes to 2 hours. Thereafter, the cells are well washed, and incubated again. After 4 days of incubation, HIV-derived antigens released in culture medium are quantitated. As a control, cells which have not been subjected to HHV-7 infection are infected with HIV under the same conditions, and antigens released into culture medium are measured. An example of an HIV-derived antigen is, but is not limited to, p24. The quantity of the antigen serves as an index of HIV growth. Therefore, if the antigen quantity is small compared to that of the control, the HIV infection preventing effect of HHV-7 is demonstrated.

The therapeutic effect on HIV infection of HHV-7 of the present invention can be measured by determining whether or not HHV-7 suppresses the growth ability of HIV in target cells. Examples of target cells used for measurement include, but are not limited to, peripheral blood mononuclear cells, CD4⁺ cells, SupT1 cells, and the like. More specifically, for example, measurement can be performed as follows.

Target cells are coinfected with HIV and HHV-7 (MOI of 0.1 to 0.01). After coinfection, the infected cells are incubated for about 30 minutes to 2 hours. Thereafter, the cells are well washed, and incubated again. As a control, cells which have been subjected to HIV infection without HHV-7 infection are used. After 4 days of incubation, HIV-derived antigens in culture medium are quantitated. An example of an HIV-derived antigen is, but is not limited to, p24. The quantity of the antigen serves as an index of HIV growth. Therefore, if the antigen quantity is small compared to that of the control, the HIV infection preventing effect of HHV-7 is demonstrated.

(HIV Therapy Using Recombinant HHV-7 and HHV-6 of the Present Invention)

Recombinant HHV-7 or HHV-6 of the present invention can be used to treat HIV. For example, a silencer gene for a HIV gene is introduced into recombinant HHV-7, and the recombinant HHV-7 is administered into HIV patients. When CD4⁺ T cells infected with HIV are infected with recombinant HHV-7, the production of HIV is suppressed. As a result, a therapeutic effect is exhibited on HIV infection.

Alternatively, since opportunistic infection is caused by CMV (cytomegalovirus), it is possible to enhance a defense against CMV using recombinant HHV-7 in which an antigen is incorporated.

(Formulation)

The present invention also provides methods of treatment and/or prevention of diseases or disorders (e.g., infectious diseases) by administration to a subject of an effective amount of a therapeutic/prophylactic agent. By the therapeutic/prophylactic agent is meant a composition of the present invention in combination with a pharmaceutically acceptable carrier type (e.g., a sterile carrier).

The therapeutic/prophylactic agent will be formulated and dosed in a fashion consistent with good medical practice, taking into account the clinical condition of the individual patient (especially the side effects of treatment with the therapeutic/prophylactic agent alone), the site of delivery, the method of administration, the scheduling of administration, and other factors known to those skilled in the art. The “effective amount” for purposes herein is thus determined by such considerations.

As a general proposition, the total pharmaceutically effective amount of the therapeutic/prophylactic agent administered parenterally per dose will be in the range of about 1 mg/kg/day to 10 mg/kg/day of patient body weight, although, as noted above, this will be subject to therapeutic discretion. More preferably, this dose is at least 0.01 mg/kg/day, and most preferably for humans between about 0.01 and 1 mg/kg/day for the cellular physiologically active material of the present invention. If given continuously, the therapeutic/prophylactic agent is typically administered at a dose rate of about 1 μg/kg/hour to about 50 μg/kg/hour, either by 1-4 injections per day or by continuous subcutaneous infusions, for example, using a mini-pump. An intravenous bag solution may also be employed. The length of treatment needed to observe changes and the interval following treatment for responses to occur appears to vary depending on the desired effect.

The therapeutic/prophylactic agents can be administered orally, rectally, parenterally, intracistemally, intravaginally, intraperitoneally, topically (as by powders, ointments, gels, drops or transdermal patch), or as an oral or nasal spray. “Pharmaceutically acceptable carrier” refers to a non-toxic solid, semisolid or liquid filler, diluent, encapsulating material or formulation auxiliary of any type. The term “parenteral” as used herein refers to modes of administration which include intravenous, intramuscular, intraperitoneal, intrasternal, subcutaneous and intraarticular injection and infusion.

The therapeutic/prophylactic agents of the invention are also suitably administered by sustained-release systems. Suitable examples of sustained-release therapeutic/prophylactic agents are administered orally, rectally, parenterally, intracistemally, intravaginally, intraperitoneally, topically (as by powders, ointments, gels, drops or transdermal patch), or as an oral or nasal spray. “Pharmaceutically acceptable carrier” refers to a non-toxic solid, semisolid or liquid filler, diluent, encapsulating material or formulation auxiliary of any type. The term “parenteral” as used herein refers to modes of administration which include intravenous, intramuscular, intraperitoneal, intrasternal, subcutaneous and intraarticular injection and infusion.

For parenteral administration, in one embodiment, the therapeutic/prophylactic agent is formulated generally by mixing it at the desired degree of purity, in a unit dosage injectable form (solution, suspension, or emulsion), with a pharmaceutically acceptable carrier, i.e., one that is non-toxic to recipients at the dosages and concentrations employed and is compatible with other ingredients of the formulation. For example, the formulation preferably does not include oxidizing agents and other compounds that are known to be deleterious to the therapeutic/prophylactic agent.

Generally, the formulations are prepared by contacting the therapeutic/prophylactic agent uniformly and intimately with liquid carriers or finely divided solid carriers or both. Then, if necessary, the product is shaped into the desired formulation. Preferably the carrier is a parenteral carrier, more preferably a solution that is isotonic with the blood of the recipient. Examples of such carrier vehicles include water, saline, Ringer's solution, and dextrose solution. Non-aqueous vehicles such as fixed oils and ethyl oleate are also useful herein, as well as liposomes.

The carrier suitably contains minor amounts of additives such as substances that enhance isotonicity and chemical stability. Such materials are non-toxic to recipients at the dosages and concentrations employed, and include buffers such as phosphate, citrate, succinate, acetic acid, and other organic acids or their salts; antioxidants such as ascorbic acid; low molecular weight (less than about ten residues) polypeptides, e.g., polyarginine or tripeptides; proteins, such as serum albumin, gelatin, or immunoglobulins; hydrophilic polymers such as polyvinylpyrrolidone; amino acids, such as glycine, glutamic acid, aspartic acid, or arginine; monosaccharides, disaccharides, and other carbohydrates including cellulose or its derivatives, glucose, manose, or dextrins; chelating agents such as EDTA; sugar alcohols such as mannitol or sorbitol; counterions such as sodium; and/or nonionic surfactants such as polysorbates, poloxamers, or PEG.

Any pharmaceutical used for therapeutic administration can be free from organisms and viruses other than a virus as an effective ingredient, i.e., sterile. Sterility is readily accomplished by filtration through sterile filtration membranes (e.g., 0.2 micron membranes). Therapeutic/prophylactic agents generally are placed into a container having a sterile access port, for example, an intravenous solution bag or vial having a stopper pierceable by a hypodermic injection needle.

Therapeutic/prophylactic agents ordinarily will be stored in unit or multi-dose containers, for example, sealed ampoules or vials, as an aqueous solution or as a lyophilized formulation for reconstitution. As an example of a lyophilized formulation, 10-ml vials are filled with 5 ml of sterile-filtered 1% (w/v) aqueous therapeutic/prophylactic agent solution, and the resulting mixture is lyophilized. The infusion solution is prepared by reconstituting the lyophilized therapeutic/prophylactic agent using bacteriostatic Water-for-injection.

The invention also provides a pharmaceutical pack or kit comprising one or more containers filled with one or more of the ingredients of the therapeutic/prophylactic agents of the invention. Associated with such container (s) can be a notice in the form prescribed by a governmental agency regulating the manufacture, use or sale of pharmaceuticals or biological products, which notice reflects approval by the agency of manufacture, use or sale for human administration. In addition, the therapeutic/prophylactic agents may be employed in conjunction with other therapeutic compounds.

The therapeutic/prophylactic agents of the invention may be administered alone or in combination with other therapeutic/prophylactic agents.

The therapeutic/prophylactic agents of the invention may be administered alone or in combination with other therapeutic agents. Therapeutic/prophylactic agents that may be administered in combination with the therapeutic/prophylactic agents of the invention, include but not limited to, chemotherapeutic agents, antibiotics, steroidal and nonsteroidal anti-inflammatories, conventional immunotherapeutic agents, cytokines and/or growth factors. Combinations may be administered either concomitantly, e.g., as an admixture, separately but simultaneously or concurrently; or sequentially. This includes presentations in which the combined agents are administered together as a therapeutic mixture, and also procedures in which the combined agents are administered separately but simultaneously, e.g., as through separate intravenous lines into the same individual. Administration “in combination” further includes the separate administration of one of the compounds or agents given first, followed by the second.

In certain embodiments, the therapeutic/prophylactic agents of the invention are administered in combination with antiretroviral agents, nucleoside reverse transcriptase inhibitors, nonnucleoside reverse transcriptase inhibitors, and/or protease inhibitors.

In a further embodiment, the therapeutic/prophylactic agents of the invention are administered in combination with an antibiotic agent. Antibiotic agents that may be used include, but are not limited to, aminoglycoside antibiotics, polyene antibiotics, penicillin antibiotics, cephem antibiotics, peptide antibiotics, microride antibiotics, and tetracycline antibiotics.

In an additional embodiment, the therapeutic/prophylactic agents of the invention are administered alone or in combination with an anti-inflammatory agent. Anti-inflammatory agents that may be administered with the therapeutic/prophylactic agents of the invention include, but are not limited to, glucocorticoids and the nonsteroidal anti-inflammatories, aminoarylcarboxylic acid derivatives, arylacetic acid derivatives, arylbutyric acid derivatives, arylcarboxylic acids, arylpropionic acid derivatives, pyrazoles, pyrazolones, salicylic acid derivatives, thiazinecarboxamides, e-acetamidocaproic acid, S-adenosylmethionine, 3-amino-4-hydroxybutyric acid, amixetrine, bendazac, benzydamine, bucolome, difenpiramide, ditazol, emorfazone, guaiazulene, nabumetone, nimesulide, orgotein, oxaceprol, paranyline, perisoxal, pifoxime, proquazone, proxazole, and tenidap.

In a further embodiment, the therapeutic/prophylactic agent of the present invention is administered in combination with other therapeutic/prophylactic regimens (e.g., radiation therapy).

Hereinafter, the present invention will be described by way of examples. However, the present invention is not limited to these examples.

Example 1

Preparation of Recombinant Herpesvirus

(1: Preparation of BAC Plasmid)

Plasmid PHA-2 used was kindly provided by Markus Wagner and Ulrich H. Koszinowski (Adler et al., (2000), J. Virol. 74: 6964-74). To prepare a recombinant virus, a BAC vector was inserted into the center of a region of about 4000 bp extending over gene U21, gene U23, gene U24, gene U24a, gene U25, and gene U26. This is because the insertion of a foreign nucleic acid into such a non-essential region was expected to have no adverse effect on the replication of herpesvirus. A scheme of inserting a BAC vector into the HHV-7 genome is schematically shown in FIG. 1.

The genomic DNA of herpesvirus strain KHR was used as a template to amplify primers BAC7-E1 (ATGCGGCCGCGCGAGTGATAGGTACTTTCT) (SEQ ID NO.: 402) and BAC7-E2 (GCTTAATTAATATATAAGTCCTTCAATAGC) (SEQ ID NO.: 403), and primers BAC7-E3 (GCTTAATTAACATGCTCTGCAATGCAAGCC) (SEQ ID NO.: 404) and BAC7-E4 (ATGCGGCCGCAAATAGCCTTTGCTCATAGC) (SEQ ID NO.: 405).

(2: Preparation of Recombinant Virus by Homologous Recombination)

The prepared plasmid pHA-2/HHV7-U21-27 contains a guanine phosphoribosyl transferase (gpt) gene as a selectable marker. The BAC vector sequence is sandwiched between two loxP sequences. Therefore, the BAC vector sequence sandwiched between the loxP sequences can be efficiently removed by the action of Cre recombinase. In addition, cells into which the plasmid containing the BAC vector sequence has been introduced can be easily confirmed by the fluorescence of a green fluorescent protein (GFP).

The plasmid was digested with NotI for linearization. Nucleofection unit (Amaxa) was used to transfect cord blood mononuclear cells cultured in a 25-cm² plastic flask with 1 μg of the linearized pHA-2/HHV7U21-27 by electroporation. One day after transfection, the transfected cells were infected with herpesvirus KHR strain.

Mycophenolic acid (12.5 μg/ml) and 100 μg/ml xanthine were used to screen recombinant viruses based on the gpt gene. In the cord blood mononuclear cells, the cytopathic effect (CPE) typical for herpesvirus was observed. Some of the cells could be confirmed under a microscope to express the GFP. This result indicates that the cord blood mononuclear cell having the introduced pHA-2/HHV-7-U21-U27 were infected with herpesvirus. The GFP-positive infected cells were cultured for 7 days, and then co-cultured with newly separated and cultured cord blood mononuclear cells for infection. The proportion of cells expressing GFP was increased in the presence of mycophenolic acid and xanthine. This indicates that the BAC vector was inserted into the herpesvirus genome and a recombinant virus was produced (FIG. 2).

(3: Enrichment of Recombinant Virus and Introduction of it into E. coli)

A recombinant virus was enriched by selection using the gpt gene in combination with mycophenolic acid and xanthine. The recombinant virus was used to infect SupT1 cells. After 6 hours, the cells were recovered and circular DNA was extracted from the cells. The circular DNA collected from the SupT1 cells was introduced into E. coli. The E. coli cells were disseminated on plates containing drugs. DNA was extracted from colonies which appeared on the plates. From the infected cells, circular virus DNA was extracted by Hirt's method (Hirt, (1967), J. M. Biol, 26: 365-9). The extracted DNA was introduced into E. coli DH10B by the electroporation method (0.1-cm cuvette, 2.5 kV) using the gene pulser (Bio-Rad) for transformation. E. coli containing HHV-7U21-27-BAC was obtained by screening on agar containing 17 μg/ml chloramphenicol.

(4: Stability of HHV-7-U21-27-BAC Plasmid in E. coli)

HHV-7U21-27-BAC was extracted from the bacteria using the NucleoBond PC 100 kit (Macherey-Nagel) in accordance with the protocol accompanying the kit. The resultant two clones were digested with restriction enzyme EcoRI.

(5: Production of Virus from HHV-7-U21-27-BAC)

HHV-7U21-27-BAC DNA (1 μg) was introduced into cord blood mononuclear cells (5×10⁶ to 10⁷) cultured in a 25-cm² plastic flask by the electroporation method. Electroporation was conducted using the nucleofactor kit (Amaxa) using the program T-08 in accordance with its manual. After electroporation, the mononuclear cells having the introduced gene were cultured in medium containing PHA (phytohemagglutinin) for 3 to 7 days.

Three to seven days after electroporation, the cord blood mononuclear cells were recovered, and were co-cultured with cord blood mononuclear cells (5×10⁶ to 10⁷) which were newly stimulated with PHA. In this case, the cells were cultured in PHA-free medium which contained drugs (MPA, xanthine). After coculturing, viral production was observed on day 2 to 3.

(6: Cutting Out of BAC Vector Sequence)

Recombinant adenovirus (AxCANCre) capable of expressing Cre recombinase (Tanaka M. et al., J. Virol., 2003 January; 77(2): 1382-1391) was kindly provided by Yasushi Kawaguchi of the Tokyo Medical and Dental University. Cord blood mononuclear cells were infected with the recombinant adenovirus at a MOI of 100. After 2 hours of virus adsorption, the cells were washed with PBS(−), followed by culturing in RPMI medium containing 5% FCS. The cord blood mononuclear cells were superinfected with recombinant human herpesvirus 24 hours after infection with recombinant adenovirus. A control experiment was conducted to confirm that the recombinant adenovirus expressed Cre recombinase and a BAC vector sequence was efficiently cut out from the HHV-7U21-27-BAC genome. The result of DNA sequencing of the obtained human herpesvirus confirmed that a BAC vector sequence was cut from HHV-7U21-27-BAC.

Example 2

Characterization of Recombinant Herpesvirus

(1: Comparison of Growth Ability of Recombinant Viruses)

HHV-7 (KHR strain) and the obtained recombinant herpesvirus are compared in terms of the growth ability in cord blood mononuclear cells or SupT1 cells using the Median tissue culture infectious dose (TCID50) method. Cord blood mononuclear cells are infected with KHR strain and recombinant virus having the same titier, followed by culturing from day 0 to day 7. Thereafter, new cord blood mononuclear cells or SupT1 cells are infected with the viruses to compare the replication ability thereof. The titer is measured by the TCID method. The resultant recombinant human herpesvirus is confirmed to exhibit substantially the same replication ability as that of human herpesvirus KHR strain in vitro.

Example 3

The method of the present invention is used to readily prepare a herpesvirus having a genome into which an HIV silencer gene (e.g., an antisense nucleic acid to an HIV gene) by steps described below.

A shuttle vector is prepared, in which the NFκB/Sp1 site of the U3 site of LTR in HIV is operatively linked upstream of the HIV silencer gene, and a region flanking a non-essential gene of HHV-7 is linked to the opposite ends of the resultant sequence. The shuttle vector and HHV-7U21-27-BAC plasmid (a plasmid containing the HHV-7 genome and a BAC vector sequence) are introduced into E. coli. As a result, homologous recombination occurs between the HHV-7-U21-27-BAC plasmid and the shuttle vector in the E. coli to produce a cointegrate in which the foreign gene (HIV silencer gene) contained in the shuttle vector is introduced into the HHV-7U21-27-BAC plasmid.

Next, since the replication origin of the shuttle vector is temperature-sensitive, the shuttle plasmid is removed. In a second recombination event, the cointegrated portion is removed. When the second recombination event occurs via a first homologous region, a plasmid having the same sequence as that of HHV-7U21-27-BAC used in the recombination is generated. In contrast, when the second recombination event occurs via a second homologous region different from the first homologous region, a modified HHV-7U21-27-BAC plasmid having a foreign gene contained in the shuttle vector is obtained. When the first homologous region and the second homologous region have substantially the same length, the probability that the second recombination event occurs in the second homologous region is substantially the same as the probability that the second recombination event occurs in the first homologous region. Therefore, about half of the resultant HHV-7-U21-27-BAC plasmids are plasmids having the same sequence as that which has been used in the recombination, while about half thereof are plasmids having the foreign gene which has been introduced into the shuttle vector.

The plasmid containing the HIV silencer is used to prepare a recombinant HHV-7 virus. The recombinant virus can be used to treat HIV infection.

Example 4

Preparation of Recombinant Herpesvirus Strain Vaccine

According to the present invention, it is possible to prepare a mutant recombinant herpesvirus having an incorporated gene encoding a desired vaccine antigen using techniques described below, and use it as a vaccine.

(Production of Vaccine)

With the recombinant herpesvirus obtained in Example 1, SupT1 cells are inoculated and cultured in 20 Roux bottles having a culture area of 210 cm². After completion of culturing, the culture media containing the cells are frozen and thawed, followed by centrifugation at 3,000 rpm for 20 minutes at 4° C. The supernatant containing viruses released from the cells is collected, which is used as a live vaccine stock solution.

Example 5

Prevention of HIV Infection

The method of Lusso et al. (Proc. Natl. Acad. Sci. USA, vol. 91, 3872 to 3876, April 1994) is used to confirm that the recombinant HHV-7 of the present invention has an HIV infection preventing effect.

CD4⁺ T cells are isolated from the peripheral blood of healthy adults by negative immunological magnet selection using mouse monoclonal antibodies (e.g., Becton Dickinson) for CD8, CD14, CD19, CD20 and CD56, and anti-mouse IgG antiserum (e.g., Dynal, Great Neck, N.Y.). The cells are stimulated with 1 μg/ml of purified phytohemagglutinin (e.g., Wellacome), followed by growth in the presence of 10 units/ml partially purified IL-2 (e.g., Boehringer Mannheim). Thus, CD4⁺ T cells are prepared.

The HIV infection preventing effect of HHV-7 of the present invention can be measured by determining whether or not the HIV replication ability in CD4⁺ T cell is suppressed by HHV-7. More specifically, the following procedure is used.

CD4⁺ T cells (10⁶) are infected with HHV-7 at a MOI of 0.01 to 0.1, followed by culturing at 37° C. for 48 hours. Thereafter, HIV (amount: 10⁵ cpm of reverse transcriptase) is added, followed by incubation for 37 minutes to 1 hour. Thereafter, the cells are well washed, and incubated again in a 24-well plate. In the post-wash incubation, IL-2 (10 units/ml) is added to culture medium. After 4 days of incubation (cell survival rate: more than 80%), p24 protein released in culture medium is quantitated with ELISA. As a control, cells which have not been subjected to HHV-7 infection are infected with HIV under the same conditions, and p24 protein released into culture medium are measured. The quantity of p24 protein serves as an index of HIV replication. Therefore, if the quantity of p24 protein is small compared to that of the control, the HIV infection preventing effect of HHV-7 is demonstrated.

Example 6

Therapy of HIV Infection

HHV-7 targets CD4 which is a target (entrance) of HIV for infection. Therefore, CD4 has been demonstrated to be able to be used for the prevention of HIV infection. In contrast, HHV-6, which is also a virus capable of infecting CD4⁺ T cells as with HHV-7 and HIV, has a target protein different from that of HHV-7 or HIV. Therefore, HHV-6 can be used as a gene therapy vector for HIV infection by, for example, introducing a gene suitable for therapy, such as a suicide gene or the like, into HIV infected cells. More specifically, the following technique can be used.

CD4⁺ T cells are prepared using the same method as described in Example 5. HIV is added to CD4⁺ T cells (10⁶), followed by incubation at 37° C. for 1 hour. Thereafter, the cells are well washed. The HIV infected cells are infected with HHV-6 (recombinant HHV-6 virus laking a gene activating the LTR of HIV) at a MOI of 1. IL-2 (10 units/ml) is added to the culture medium, followed by incubation at 37° C. for 1 hour. After incubation, p24 protein released into the culture medium is quantitated with ELISA. As a control, cells which have not been subjected to HHV-6 treatment are used, and p24 protein released into culture medium is measured. The quantity of p24 protein serves as an index of HIV replication. Therefore, if the quantity of p24 protein is small compared to that of the control, the HIV infection preventing effect of HHV-6 is demonstrated.

Although certain preferred embodiments have been described herein, it is not intended that such embodiments be construed as limitations on the scope of the invention except as set forth in the appended claims. Various other modifications and equivalents will be apparent to and can be readily made by those skilled in the art, after reading the description herein, without departing from the scope and spirit of this invention. All patents, published patent applications and publications cited herein are incorporated by reference as if set forth fully herein.

The present invention provides a method for producing a recombinant herpesvirus from a single virus strain using, for example, BAC (E. coli artificial chromosome), and a recombinant herpesvirus produced by the method. The present invention also provides a pharmaceutical composition comprising a recombinant herpesvirus.

Further, the present invention provides a vector comprising a herpesvirus genomic gene and a BAC vector sequence, a cell containing such a vector, and a nucleic acid cassette comprising a fragment capable of homologous recombination with a herpesvirus genome, and a BAC vector sequence.

Further, the present invention provides a pharmaceutical composition comprising a recombinant herpesvirus for the prevention and therapy of HIV infection.

DESCRIPTION OF SEQUENCE TABLE

SEQ ID NO.: 1, JI strain genome sequence

SEQ ID NO.: 2, H1 5′→3′ direction 33-542 sequence of amino acids (hereinafter “AAs”) 1-170

SEQ ID NO.: 3, DR2 5′→3′ direction 898-2100 sequence of AAs 1-401

SEQ ID NO.: 4, H2 5′→3′ direction 2267-2506 sequence of AAs 1-80

SEQ ID NO.: 5, DR6 5′→3′ direction 2562-3050 sequence of AAs 1-163

SEQ ID NO.: 6, DR7 5′→3′ direction 3122-3910 sequence of AAs 1-263

SEQ ID NO.: 7, U10 5′→3′ direction 14608-15963 sequence of AAs 1-452

SEQ ID NO.: 8, U12 5′→3′ direction 18396-19436 sequence of AAs 1-347

SEQ ID NO.: 9, U13 5′→3′ direction 19521-19817 sequence of AAs 1-99

SEQ ID NO.: 10, U14 5′→3′ direction 19885-21831 sequence of AAs 1-649

SEQ ID NO.: 11, U17a 5′→3′ direction 24318-24587 sequence of AAs 1-90

SEQ ID NO.: 12, U30 5′→3′ direction 37362-40178 sequence of AAs 1-939

SEQ ID NO.: 13, U31 5′→3′ direction 40179-46358 sequence of AAs 1-2060

SEQ ID NO.: 14, U36 5′→3′ direction 49118-50575 sequence of AAs 1-486

SEQ ID NO.: 15, U37 5′→3′ direction 50577-51356 sequence of AAs 1-260

SEQ ID NO.: 16, U44 5′→3′ direction 67143-67754 sequence of AAs 1-204

SEQ ID NO.: 17, U46 5′→3′ direction 68930-69190 sequence of AAs 1-87

SEQ ID NO.: 18, U49 5′→3′ direction 73003-73722 sequence of AAs 1-240

SEQ ID NO.: 19, U51 5′→3′ direction 75304-76188 sequence of AAs 1-295

SEQ ID NO.: 20, U53 5′→3′ direction 76957-78495 sequence of AAs 1-513

SEQ ID NO.: 21, U58 5′→3′ direction 87563-89890 sequence of AAs 1-776

SEQ ID NO.: 22, U62 5′→3′ direction 92017-92244 sequence of AAs 1-76

SEQ ID NO.: 23, U64 5′→3′ direction 92829-94148 sequence of AAs 1-440

SEQ ID NO.: 24, U67 5′→3′ direction 95984-97024 sequence of AAs 1-347

SEQ ID NO.: 25, U69 5′→3′ direction 97371-99011 sequence of AAs 1-547

SEQ ID NO.: 26, U70 5′→3′ direction 99013-100455 sequence of AAs 1-481

SEQ ID NO.: 27, U73 5′→3′ direction 101693-104056 sequence of AAs 1-788

SEQ ID NO.: 28, U77 5′→3′ direction 108435-110897 sequence of AAs 1-821

SEQ ID NO.: 29, H5 5′→3′ direction 112811-113311 sequence of AAs 1-167

SEQ ID NO.: 30, U79 5′→3′ direction 113502-114203 sequence of AAs 1-234

SEQ ID NO.: 31, H6 5′→3′ direction 114257-114505 sequence of AAs 1-83

SEQ ID NO.: 32, U80 5′→3′ direction 114557-115189 sequence of AAs 1-211

SEQ ID NO.: 33, U91 5′→3′ direction 129122-129625 sequence of AAs 1-168

SEQ ID NO.: 34, H7 5′→3′ direction 130829-132112 sequence of AAs 1-428

SEQ ID NO.: 35, U95 5′→3′ direction 133382-136204 sequence of AAs 1-941

SEQ ID NO.: 36, Ht 5′→3′ direction 139080-139589 sequence of AAs 1-170

SEQ ID NO.: 37, DR2′ 5′→3′ direction 139945-141147 sequence of AAs 1-401

SEQ ID NO.: 38, H2′ 5′→3′ direction 141314-141553 sequence of AAs 1-80

SEQ ID NO.: 39, DR6′ 5′→3′ direction 141609-142097 sequence of AAs 1-163

SEQ ID NO.: 40, DR7′ 5′→3′ direction 142169-142957 sequence of AAs 1-263

SEQ ID NO.: 41, DR1 5′→3′ direction 368-826 nucleic acid sequence encoding AAs 1-153

SEQ ID NO.: 42, DR1 5′→3′ direction 368-826 sequence of AAs 1-153

SEQ ID NO.: 43, U50 5′→3′ direction 73538-75202 nucleic acid sequence encoding AAs 1-555

SEQ ID NO.: 44, U50 5′→3′ direction 73538-75202 sequence of AAs 1-555

SEQ ID NO.: 45, U59 5′→3′ direction 89838-90881 nucleic acid sequence encoding AAs 1-348

SEQ ID NO.: 46, U59 5′→3′ direction 89838-90881 sequence of AAs 1-348

SEQ ID NO.: 47, U63 5′→3′ direction 92216-92851 nucleic acid sequence encoding Ms 1-212

SEQ ID NO.: 48, U63 5′→3′ direction 92216-92851 sequence of AAs 1-212

SEQ ID NO.: 49, U65 5′→3′ direction 94111-95103 nucleic acid sequence encoding Ms 1-331

SEQ ID NO.: 50, U65 5′→3° direction 94111-95103 sequence of AAs 1-331

SEQ ID NO.: 51, U68 5′→3′ direction 97024-97368 nucleic acid sequence encoding Ms 1-115

SEQ ID NO.: 52, U68 5′→3′ direction 97024-97368 sequence of Ms 1-115

SEQ ID NO.: 53, U71 5′→3′ direction 100392-100613 nucleic acid sequence encoding Ms 1-74

SEQ ID NO.: 54, U71 5′→3′ direction 100392-100613 sequence of AAs 1-74

SEQ ID NO.: 55, U74 5′→3′ direction 104007-105986 nucleic acid sequence encoding Ms 1-660

SEQ ID NO.: 56, U74 5′→3′ direction 104007-105986 sequence of AAs 1-660

SEQ ID NO.: 57, DR1′ 5′→3′ direction 139415-139873 nucleic acid sequence encoding AAs 1-153

SEQ ID NO.: 58, DR1′ 5′→3′ direction 139415-139873 sequence of AAs 1-153

SEQ ID NO.: 59, genome sequence of strain JI (complementary strand)

SEQ ID NO.: 60, H3 3′→5′ direction 3976-4224 sequence of AAs 1-83

SEQ ID NO.: 61, H4 3′→5′ direction 4449-4745 sequence of AAs 1-99

SEQ ID NO.: 62, U2 3′→5′ direction 6338-7417 sequence of AAs 1-360

SEQ ID NO.: 63, U3 3′→5′ direction 7578-8732 sequence of AAs 1-385

SEQ ID NO.: 64, U4 3′→5′ direction 8754-10382 sequence of AAs 1-543

SEQ ID NO.: 65, U5/7 3′→5′ direction 10407-13004 sequence of AAs 1-866

SEQ ID NO.: 66, U8 3′→5′ direction 13174-14262 sequence of AAs 1-363

SEQ ID NO.: 67, U11 3′→5′ direction 15982-18249 sequence of AAs 1-756

SEQ ID NO.: 68, U15 3′→5′ direction 22244-22564 sequence of AAs 1-107

SEQ ID NO.: 69, U17 3′→5′ direction 23570-23836 sequence of AAs 1-89

SEQ ID NO.: 70, U18 3′→5′ direction 24713-25600 sequence of AAs 1-296

SEQ ID NO.: 71, U19 3′→5′ direction 25945-26922 sequence of AAs 1-326

SEQ ID NO.: 72, U21 3′→5′ direction 28202-29494 sequence of AAs 1-431

SEQ ID NO.: 73, U23 3′→5′ direction 29903-30418 sequence of AAs 1-172

SEQ ID NO.: 74, U24 3′→5′ direction 30524-30772 sequence of AAs 1-83

SEQ ID NO.: 75, U25 3′→5′ direction 30936-31898 sequence of AAs 1-321

SEQ ID NO.: 76, U27 3′→5′ direction 32857-33951 sequence of AAs 1-365

SEQ ID NO.: 77, U28 3′→5′ direction 34064-36484 sequence of AAs 1-807

SEQ ID NO.: 78, U29 3′→5′ direction 36487-37347 sequence of AAs 1-287

SEQ ID NO.: 79, U32 3′→5′ direction 46355-46627 sequence of AAs 1-91

SEQ ID NO.: 80, U34 3′→5′ direction 47992-48768 sequence of AAs 1-259

SEQ ID NO.: 81, U35 3′→5′ direction 48805-49119 sequence of AAs 1-105

SEQ ID NO.: 82, U38 3′→5′ direction 51363-54401 sequence of AAs 1-1013

SEQ ID NO.: 83, U40 3′→5′ direction 56832-58997 sequence of AAs 1-722

SEQ ID NO.: 84, U41 3′→5′ direction 59000-62395 sequence of AAs 1-1132

SEQ ID NO.: 85, U42 3′→5′ direction 62772-64352 sequence of AAs 1-527

SEQ ID NO.: 86, U43 3′→5′ direction 64501-67086 sequence of AAs 1-862

SEQ ID NO.: 87, U45 3′→5′ direction 67759-68898 sequence of AAs 1-380

SEQ ID NO.: 88, U47 3′→5′ direction 69638-70579 sequence of AAs 1-314

SEQ ID NO.: 89, U48 3′→5′ direction 70817-72889 sequence of AAs 1-691

SEQ ID NO.: 90, U52 3′→5′ direction 76185-76949 sequence of AAs 1-255

SEQ ID NO.: 91, U54 3′→5′ direction 78503-79870 sequence of AAs 1-456

SEQ ID NO.: 92, U55A 3′→5′ direction 79918-81201 sequence of AAs 1-428

SEQ ID NO.: 93, U55B 3′→5′ direction 81285-82577 sequence of AAs 1-431

SEQ ID NO.: 94, U56 3′→5′ direction 82630-83511 sequence of AAs 1-294

SEQ ID NO.: 95, U57 3′→5′ direction 83514-87551 sequence of AAs 1-1346

SEQ ID NO.: 96, U72 3′→5′ direction 100636-101676 sequence of AAs 1-347

SEQ ID NO.: 97, U76 3′→5′ direction 106667-108589 sequence of AAs 1-641

SEQ ID NO.: 98, U81 3′→5′ direction 115184-115948 sequence of AAs 1-255

SEQ ID NO.: 99, U82 3′→5′ direction 116038-116778 sequence of AAs 1-247

SEQ ID NO.: 100, U84 3′→5′ direction 117111-118043 sequence of AAs 1-311

SEQ ID NO.: 101, U85 3′→5′ direction 118071-118913 sequence of AAs 1-281

SEQ ID NO.: 102, U86 3′→5′ direction 119091-122708 sequence of AAs 1-1206

SEQ ID NO.: 103, U89 3′→5′ direction 125420-128668 sequence of AAs 1-1083

SEQ ID NO.: 104, U90 3′→5′ direction 128776-129051 sequence of AAs 1-92

SEQ ID NO.: 105, H8 3′→5′ direction 136307-136579 sequence of AAs 1-91

SEQ ID NO.: 106, U99 3′→5′ direction 138375-138692 sequence of AAs 1-106

SEQ ID NO.: 107, U100 3′→5′ direction 138751-138999 sequence of AAs 1-83

SEQ ID NO.: 108, H3′ 3′→5′ direction 143023-143271 sequence of AAs 1-83

SEQ ID NO.: 109, H4′ 3′→5′ direction 143496-143792 sequence of AAs 1-99

SEQ ID NO.: 110, U17Ex 3′→5′ direction 22772-23547 and 23620-23836 nucleic acid sequence encoding AAs 1-331

SEQ ID NO.: 111, U17Ex 3′→5′ direction 22772-23547 and 23620-23836 sequence of AAs 1-331

SEQ ID NO.: 112, U60-U66 3′→5′ direction 90878-92005 and 95122-95985 nucleic acid sequence encoding AAs 1-664

SEQ ID NO.: 113, U60-U66 3′→5′ direction 90878-92005 and 95122-95985 sequence of AAs 1-664

SEQ ID NO.: 114, U20 3′→5′ direction 27036-28211 nucleic acid sequence encoding AAs 1-392

SEQ ID NO.: 115, U20 3′→5′ direction 27036-28211 sequence of AAs 1-392

SEQ ID NO.: 116, U24a 3′→5′ direction 30776-31129 nucleic acid sequence encoding AAs 1-118

SEQ ID NO.: 117, U24a 3′→5′ direction 30776-31129 sequence of AAs 1-118

SEQ ID NO.: 118, U26 3′→5′ direction 31988-32869 nucleic acid sequence encoding Ms 1-294

SEQ ID NO.: 119, U26 3′→5′ direction 31988-32869 sequence of AAs 1-294

SEQ ID NO.: 120, U33 3′→5′ direction 46608-48041 nucleic acid sequence encoding Ms 1-478

SEQ ID NO.: 121, U33 3′→5′ direction 46608-48041 sequence of AAs 1-478

SEQ ID NO.: 122, U39 3′→5′ direction 54401-56869 nucleic acid sequence encoding AAs 1-823

SEQ ID NO.: 123, U39 3′→5′ direction 54401-56869 sequence of AAs 1-823

SEQ ID NO.: 124, U75 3′→5′ direction 105973-106743 nucleic acid sequence encoding AAs 1-257

SEQ ID NO.: 125, U75 3′→5′ direction 105973-106743 sequence of Ms 1-257

SEQ ID NO.: 126, U98 3′→5′ direction 137945-138451 nucleic acid sequence encoding Ms 1-169

SEQ ID NO.: 127, U98 3′→5′ direction 137945-138451 sequence of Ms 1-169

SEQ ID NO.: 128, genome sequence of strain U1102

SEQ ID NO.: 129, DR1, 5′→3′ direction, 501-794, sequence of Ms 1-98

SEQ ID NO.: 130, DR4, 5′→3′ direction, 2746-3048, sequence of Ms 1-101

SEQ ID NO.: 131, DR6, 5′→3′ direction, 4725-5036, sequence of Ms 1-104

SEQ ID NO.: 132, DR7, 5′→3′ direction, 5629-6720, sequence of AAs 1-364

SEQ ID NO.: 133, DR8, 5′→3′ direction, 7237-7569, sequence of Ms 1-111

SEQ ID NO.: 134, U1, 5′→3′ direction, 8245-8616, sequence of AAs 1-124

SEQ ID NO.: 135, U6, 5′→3′ direction, 14619-14867, sequence of Ms 1-83

SEQ ID NO.: 136, U10, 5′→3′ direction, 17604-18914, sequence of AAs 1-437

SEQ ID NO.: 137, U12, 5′→3′ direction, 21856-22812, sequence of AAs 1-319

SEQ ID NO.: 138, U13, 5′→3′ direction, 22898-23218, sequence of AAs 1-107

SEQ ID NO.: 139, U14, 5′→3′ direction, 23316-25145, sequence of AAs 1-610

SEQ ID NO.: 140, U30, 5′→3′ direction, 41884-45132, sequence of AAs 1-1083

SEQ ID NO.: 141, U31, 5′→3′ direction, 45150-51383, sequence of AAs 1-2078

SEQ ID NO.: 142, U36, 5′→3′ direction, 54252-55706, sequence of AAs 1-485

SEQ ID NO.: 143, U37, 5′→3′ direction, 55710-56504, sequence of AAs 1-265

SEQ ID NO.: 144, U44, 5′→3′ direction, 73446-74087, sequence of AAs 1-214

SEQ ID NO.: 145, U46, 5′→3′ direction, 75291-75545, sequence of AAs 1-85

SEQ ID NO.: 146, U49, 5′→3′ direction, 80277-81035, sequence of AAs 1-253

SEQ ID NO.: 147, U51, 5′→3′ direction, 82574-83479, sequence of AAs 1-302

SEQ ID NO.: 148, U53, 5′→3′ direction, 84281-85867, sequence of AAs 1-529

SEQ ID NO.: 149, U58, 5′→3′ direction, 93924-96242, sequence of AAs 1-773

SEQ ID NO.: 150, U62, 5′→3′ direction, 98427-98684, sequence of AAs 1-86

SEQ ID NO.: 151, U64, 5′→3′ direction, 99260-100588, sequence of AAs 1-443

SEQ ID NO.: 152, U67, 5′→3′ direction, 102458-103519, sequence of AAs 1-354

SEQ ID NO.: 153, U69, 5′→3′ direction, 103866-105554, sequence of AAs 1-563

SEQ ID NO.: 154, U70, 5′→3′ direction, 105562-107028, sequence of AAs 1-489

SEQ ID NO.: 155, U73, 5′→3′ direction, 108325-110667, sequence of AAs 1-781

SEQ ID NO.: 156, U77, 5′→3′ direction, 115100-117574, sequence of AAs 1-825

SEQ ID NO.: 157, U79, 5′→3′ direction, 120164-121198, sequence of AAs 1-345

SEQ ID NO.: 158, U83, 5′→3′ direction, 123528-123821, sequence of AAs 1-98

SEQ ID NO.: 159, U88, 5′→3′ direction, 131034-132275, sequence of AAs 1-414

SEQ ID NO.: 160, putative protein U90, 5′→3′ direction, 136266-136481, sequence of AAs 1-72

SEQ ID NO.: 161, U91, 5′→3′ direction, 136485-136829, sequence of AAs 1-115

SEQ ID NO.: 162, U95, 5′→3′ direction, 142941-146306, sequence of AAs 1-1122

SEQ ID NO.: 163, DR1, 5′→3′ direction, 151734-152027, sequence of Ms 1-98

SEQ ID NO.: 164, DR4, 5′→3′ direction, 153979-154281, sequence of Ms 1-101

SEQ ID NO.: 165, DR6, 5′→3′ direction, 155958-156269, sequence of AAs 1-104

SEQ ID NO.: 166, DR7, 5′→3′ direction, 156862-157953, sequence of AAs 1-364

SEQ ID NO.: 167, DR8, 5′→3′ direction, 158470-158802, sequence of AAs 1-111

SEQ ID NO.: 168, DR2, 5′→3′ direction, 791-2653, nucleic acid sequence encoding Ms 1-621

SEQ ID NO.: 169, DR2, 5′→3′ direction, 791-2653, sequence of AAs 1-621

SEQ ID NO.: 170, U12 exon 1-2, 5′→3′ direction, 21680-21710 and 21800-22812, nucleci acid sequence encoding AAs 1-348

SEQ ID NO.: 171, U12 exon 1-2, 5′→3′ direction, 21680-21710 and 21800-22812, sequence of AAs 1-348

SEQ ID NO.: 172, U50, 5′→3′ direction, 80812-82479, nucleic acid sequence encoding Ms 1-556

SEQ ID NO.: 173, U50, 5′→3′ direction, 80812-82479, sequence of Ms 1-556

SEQ ID NO.: 174, U59, 5′→3′ direction, 96239-97291, nucleic acid sequence encoding Ms 1-351

SEQ ID NO.: 175, U59, 5′→3′ direction, 96239-97291, sequence of Ms 1-351

SEQ ID NO.: 176, U63, 5′→3′ direction, 98632-99282, nucleic acid sequence encoding Ms 1-217

SEQ ID NO.: 177, U63, 5′→3′ direction, 98632-99282, sequence of AAs 1-217

SEQ ID NO.: 178, U65, 5′→3′ direction, 100545-101552, nucleic acid sequence encoding Ms 1-336

SEQ ID NO.: 179, U65, 5′→3′ direction, 100545-101552, sequence of AAs 1-336

SEQ ID NO.: 180, U68, 5′→3′ direction, 103519-103863, nucleic acid sequence encoding Ms 1-115

SEQ ID NO.: 181, U68, 5′→3′ direction, 103519-103863, sequence of Ms 1-115

SEQ ID NO.: 182, U71, 5′→3′ direction, 106965-107198, nucleic acid sequence encoding Ms 1-78

SEQ ID NO.: 183, U71, 5′→3′ direction, 106965-107198, sequence of Ms 1-78

SEQ ID NO.: 184, U74, 5′→3′ direction, 110636-112624, nucleic acid sequence encoding Ms 1-663

SEQ ID NO.: 185, U74, 5′→3′ direction, 110636-112624, sequence of Ms 1-663

SEQ ID NO.: 186, U80, 5′→3′ direction, 121170-121766, nucleic acid sequence encoding Ms 1-199

SEQ ID NO.: 187, U80, 5′→3′ direction, 121170-121766, sequence of Ms 1-199

SEQ ID NO.: 188, DR2′, 5′→3′ direction, 152024-153886, nucleic acid sequence encoding Ms 1-621

SEQ ID NO.: 189, DR2′, 5′→3′ direction, 152024-153886, sequence of AAs 1-621

SEQ ID NO.: 190, genome sequence of strain U1102 (complementary strand)

SEQ ID NO.: 191, DR5, 3′→5′ direction, 154967-155404, sequence of Ms 1-146

SEQ ID NO.: 192, DR3, 3′→5′ direction, 153634-154212, sequence of Ms 1-193

SEQ ID NO.: 193, RJ1, 3′→5′ direction, 151140-151571, sequence of Ms 1-144

SEQ ID NO.: 194, U100, 3′→5′ direction, 149868-150437, sequence of AAs 1-190

SEQ ID NO.: 195, U99, 3′→5′ direction, 149485-149766, sequence of Ms 1-94

SEQ ID NO.: 196, U98, 3′→5′ direction, 148741-149391, sequence of AAs 1-217

SEQ ID NO.: 197, U97, 3′→5′ direction, 147808-148077, sequence of Ms 1-90

SEQ ID NO.: 198, U96, 3′→5′ direction, 146641-146940, sequence of AAs 1-100

SEQ ID NO.: 199, U94, 3′→5′ direction, 141394-142866, sequence of AAs 1-491

SEQ ID NO.: 200, U93, 3′→5′ direction, 138531-139124, sequence of AAs 1-198

SEQ ID NO.: 201, U92, 3′→5′ direction, 138049-138492, sequence of Ms 1-148

SEQ ID NO.: 202, U90, 3′→5′ direction, 135664-135948, sequence of Ms 1-95

SEQ ID NO.: 203, U89, 3′→5′ direction, 133091-135610, sequence of Ms 1-840

SEQ ID NO.: 204, U86, 3′→5′ direction, 125989-128136, sequence of Ms 1-716

SEQ ID NO.: 205, U85, 3′→5′ direction, 124981-125853, sequence of Ms 1-291

SEQ ID NO.: 206, U84, 3′→5′ direction, 123925-124953, sequence of Ms 1-343

SEQ ID NO.: 207, U82, 3′→5′ direction, 122653-123405, sequence of Ms 1-251

SEQ ID NO.: 208, U81, 3′→5′ direction, 121810-122577, sequence of Ms 1-256

SEQ ID NO.: 209, U78, 3′→5′ direction, 118709-119038, sequence of Ms 1-110

SEQ ID NO.: 210, U75, 3′→5′ direction, 112659-113408, sequence of Ms 1-250

SEQ ID NO.: 211, U72, 3′→5′ direction, 107278-108312, sequence of Ms 1-345

SEQ ID NO.: 212, U66, 3′→5′ direction, 101569-102486, sequence of Ms 1-306

SEQ ID NO.: 213, U60, 3′→5′ direction, 97288-98256, sequence of AAs 1-323

SEQ ID NO.: 214, U57, 3′→5′ direction, 89875-93912, sequence of Ms 1-1346

SEQ ID NO.: 215, U56, 3′→5′ direction, 88983-89873, sequence of Ms 1-297

SEQ ID NO.: 216, U55, 3′→5′ direction, 87505-88803, sequence of Ms 1-433

SEQ ID NO.: 217, U54, 3′→5′ direction, 86051-87427, sequence of AAs 1-459

SEQ ID NO.: 218, U52, 3′→5′ direction, 83498-84274, sequence of AAs 1-259

SEQ ID NO.: 219, U48, 3′→5′ direction, 78034-80118, sequence of AAs 1-695

SEQ ID NO.: 220, U47, 3′→5′ direction, 75912-77867, sequence of AAs 1-652

SEQ ID NO.: 221, U45, 3′→5′ direction, 74088-75218, sequence of AAs 1-377

SEQ ID NO.: 222, U43, 3′→5′ direction, 70823-73405, sequence of AAs 1-861

SEQ ID NO.: 223, U42, 3′→5′ direction, 69054-70598, sequence of AAs 1-515

SEQ ID NO.: 224, U41, 3′→5′ direction, 64222-67620, sequence of AAs 1-1133

SEQ ID NO.: 225, U40, 3′→5′ direction, 62034-64214, sequence of AAs 1-727

SEQ ID NO.: 226, U38, 3′→5′ direction, 56550-59588, sequence of AAs 1-1013

SEQ ID NO.: 227, U35, 3′→5′ direction, 53933-54253, sequence of AAs 1-107

SEQ ID NO.: 228, U33, 3′→5′ direction, 51723-53135, sequence of AAs 1-471

SEQ ID NO.: 229, U32, 3′→5′ direction, 51455-51721, sequence of AAs 1-89

SEQ ID NO.: 230, U29, 3′→5′ direction, 41457-42356, sequence of AAs 1-300

SEQ ID NO.: 231, U28, 3′→5′ direction, 39020-41434, sequence of AAs 1-805

SEQ ID NO.: 232, U26, 3′→5′ direction, 36922-37809, sequence of AAs 1-296

SEQ ID NO.: 233, U25, 3′→5′ direction, 35864-36814, sequence of AAs 1-317

SEQ ID NO.: 234, Unknown1, 3′→5′ direction, 35674-35847, sequence of AAs 1-58

SEQ ID NO.: 235, U24, 3′→5′ direction, 35392-35655, sequence of AAs 1-88

SEQ ID NO.: 236, U23, 3′→5′ direction, 34375-35085, sequence of AAs 1-237

SEQ ID NO.: 237, U22, 3′→5′ direction, 33739-34347, sequence of AAs 1-203

SEQ ID NO.: 238, U21, 3′→5′ direction, 32340-33641, sequence of AAs 1-434

SEQ ID NO.: 239, U20, 3′→5′ direction, 31069-32337, sequence of AAs 1-423

SEQ ID NO.: 240, U19, 3′→5′ direction, 29649-30818, sequence of AAs 1-390

SEQ ID NO.: 241, U18, 3′→5′ direction, 28508-29389, sequence of AAs 1-294

SEQ ID NO.: 242, U16, 3′→5′ direction, 26259-27116, sequence of AAs 1-286

SEQ ID NO.: 243, U15, 3′→5′ direction, 25660-25992, sequence of AAs 1-111

SEQ ID NO.: 244, U11, 3′→5′ direction, 18966-21578, sequence of AAs 1-871

SEQ ID NO.: 245, U9, 3′→5′ direction, 17238-17552, sequence of AAs 1-105

SEQ ID NO.: 246, U8, 3′→5′ direction, 16021-17091, sequence of AAs 1-357

SEQ ID NO.: 247, U7, 3′→5′ direction, 14908-15936, sequence of AAs 1-343

SEQ ID NO.: 248, U5, 3′→5′ direction, 13214-14548, sequence of AAs 1-445

SEQ ID NO.: 249, U4, 3′→5′ direction, 11485-13092, sequence of AAs 1-536

SEQ ID NO.: 250, U3, 3′→5′ direction, 10155-11276, sequence of AAs 1-374

SEQ ID NO.: 251, U2, 3′→5′ direction, 8716-9816, sequence of AAs 1-367

SEQ ID NO.: 252, LJ1, 3′→5′ direction, 7467-8432, sequence of AAs 1-322

SEQ ID NO.: 253, DR5, 3′→5′ direction, 3734-4171, sequence of Ms 1-146

SEQ ID NO.: 254, DR3, 3′→5′ direction, 2401-2979, sequence of AAs 1-193

SEQ ID NO.: 255, LT1, 3′→5′ direction, 1-338, sequence of AAs 1-113

SEQ ID NO.: 256, U16 exon 1-2, 3′→5′ direction, 26259-27034 and 27187-27349, nucleic acid sequence encoding Ms 1-313

SEQ ID NO.: 257, U16 exon 1-2, 3′→5′ direction, 26259-27034 and 27187-27349, sequence of AAs 1-313

SEQ ID NO.: 258, U17, 3′→5′ direction, 26948-27349, nucleic acid sequence encoding Ms 1-134

SEQ ID NO.: 259, U17, 3′→5′ direction, 26948-27349, sequence of Ms 1-134

SEQ ID NO.: 260, U39, 3′→5′ direction, 59588-62080, nucleic acid sequence encoding AAs 1-831

SEQ ID NO.: 261, U39, 3′→5′ direction, 59588-62080, sequence of AAs 1-831

SEQ ID NO.: 262, U34, 3′→5′ direction, 53086-53916, nucleic acid sequence encoding Ms 1-277

SEQ ID NO.: 263, U34, 3′→5′ direction, 53086-53916, sequence of AAs 1-277

SEQ ID NO.: 264, U27, 3′→5′ direction, 37797-38978, nucleic acid sequence encoding Ms 1-394

SEQ ID NO.: 265, U27, 3′→5′ direction, 37797-38978, sequence of Ms 1-394

SEQ ID NO.: 266, U61, 3′→5′ direction, 98231-98578, nucleic acid sequence encoding Ms 1-116

SEQ ID NO.: 267, U61, 3′→5′ direction, 98231-98578, sequence of Ms 1-116

SEQ ID NO.: 268, U76, 3′→5′ direction, 113317-115305, nucleic acid sequence encoding Ms 1-663

SEQ ID NO.: 269, U76, 3′→5′ direction, 113317-115305, sequence of Ms 1-663

SEQ ID NO.: 270, U87, 3′→5′ direction, 127551-130043, nucleic acid sequence encoding AAs 1-831

SEQ ID NO.: 271, U87, 3′→5′ direction, 127551-130043, sequence of Ms 1-831

SEQ ID NO.: 272, genome sequence of strain HST

SEQ ID NO.: 273, DR1, 5′→3′ direction, 576-842, sequence of Ms 1-89

SEQ ID NO.: 274, DR2, 5′→3′ direction, 1027-2970, sequence of Ms 1-648

SEQ ID NO.: 275, DR6, 5′→3′ direction, 5025-5336, sequence of Ms 1-104

SEQ ID NO.: 276, DR7, 5′→3′ direction, 6512-7150, sequence of Ms 1-213

SEQ ID NO.: 277, D, 5′→3′ direction, 7928-8662, sequence of AAs 1-245

SEQ ID NO.: 278, U1, 5′→3′ direction, 8929-9384, sequence of AAs 1-152

SEQ ID NO.: 279, U6, 5′→3′ direction, 15395-15652, sequence of AAs 1-86

SEQ ID NO.: 280, U10, 5′→3′ direction, 18386-19897, sequence of AAs 1-504

SEQ ID NO.: 281, U13, 5′→3′ direction, 23699-24022, sequence of AAs 1-108

SEQ ID NO.: 282, U14, 5′→3′ direction, 24136-25953, sequence of AAs 1-606

SEQ ID NO.: 283, U30, 5′→3′ direction, 42839-46087, sequence of AAs 1-1083

SEQ ID NO.: 284, U31, 5′→3′ direction, 46105-52338, sequence of AAs 1-2078

SEQ ID NO.: 285, U36, 5′→3′ direction, 55212-56660, sequence of AAs 1-483

SEQ ID NO.: 286, U37, 5′→3′ direction, 56664-57458, sequence of AAs 1-265

SEQ ID NO.: 287, U44, 5′→3′ direction, 74335-75030, sequence of AAs 1-232

SEQ ID NO.: 288, U46, 5′→3′ direction, 76180-76434, sequence of AAs 1-85

SEQ ID NO.: 289, U49, 5′→3′ direction, 81342-82100, sequence of AAs 1-253

SEQ ID NO.: 290, U51, 5′→3′ direction, 83642-84547, sequence of AAs 1-302

SEQ ID NO.: 291, U53, 5′→3′ direction, 85350-86936, sequence of AAs 1-529

SEQ ID NO.: 292, U58, 5′→3′ direction, 95048-97366, sequence of AAs 1-773

SEQ ID NO.: 293, U59, 5′→3′ direction, 97375-98415, sequence of AAs 1-347

SEQ ID NO.: 294, U62, 5′→3′ direction, 99551-99814, sequence of AAs 1-88

SEQ ID NO.: 295, U64, 5′→3′ direction, 100390-101718, sequence of AAs 1-443

SEQ ID NO.: 296, U67, 5′→3′ direction, 103591-104652, sequence of AAs 1-354

SEQ ID NO.: 297, U69, 5′→3′ direction, 104999-106690, sequence of AAs 1-564

SEQ ID NO.: 298, U70, 5′→3′ direction, 106698-108164, sequence of AAs 1-489

SEQ ID NO.: 299, U73, 5′→3′ direction, 109475-111817, sequence of AAs 1-781

SEQ ID NO.: 300, U77, 5′→3′ direction, 116250-118724, sequence of AAs 1-825

SEQ ID NO.: 301, U79, 5′→3′ direction, 121322-122359, sequence of AAs 1-346

SEQ ID NO.: 302, U80, 5′→3′ direction, 122640-122942, sequence of AAs 1-101

SEQ ID NO.: 303, U83, 5′→3′ direction, 124657-124998, sequence of AAs 1-114

SEQ ID NO.: 304, U91, 5′→3′ direction, 138630-138974, sequence of AAs 1-115

SEQ ID NO.: 305, U95, 5′→3′ direction, 144230-147868, sequence of AAs 1-1213

SEQ ID NO.: 306, DR1R, 5′→3′ direction, 153618-153884, sequence of AAs 1-89

SEQ ID NO.: 307, DR2R, 5′→3′ direction, 154069-156012, sequence of AAs 1-648

SEQ ID NO.: 308, DR6R, 5′→3′ direction, 158067-158378, sequence of AAs 1-104

SEQ ID NO.: 309, DR7R, 5′→3′ direction, 159554-160192, sequence of AAs 1-213

SEQ ID NO.: 310, U12, 5′→3′ direction, 22479-22511 and 22589-23617, nucleic acid sequence encoding AAs 1-354

SEQ ID NO.: 311, U12, 5′→3′ direction, 22479-22511 and 22589-23617, sequence of AAs 1-354

SEQ ID NO.: 312, U50, 5′→3′ direction, 81877-83544, nucleic acid sequence encoding AAs 1-556

SEQ ID NO.: 313, U50, 5′→3′ direction, 81877-83544, sequence of AAs 1-556

SEQ ID NO.: 314, U63, 5′→3′ direction, 99756-100412, nucleic acid sequence encoding AAs 1-219

SEQ ID NO.: 315, U63, 5′→3′ direction, 99756-100412, sequence of AAs 1-219

SEQ ID NO.: 316, U65, 5′→3′ direction, 101675-102682, nucleic acid sequence encoding AAs 1-336

SEQ ID NO.: 317, U65, 5′→3′ direction, 101675-102682, sequence of AAs 1-336

SEQ ID NO.: 318, U68, 5′→3′ direction, 104652-104996, nucleic acid sequence encoding AAs 1-115

SEQ ID NO.: 319, U68, 5′→3′ direction, 104652-104996, sequence of AAs 1-115

SEQ ID NO.: 320, U71, 5′→3′ direction, 108101-108346, nucleic acid sequence encoding AAs 1-82

SEQ ID NO.: 321, U71, 5′→3′ direction, 108101-108346, sequence of AAs 1-82

SEQ ID NO.: 322, U74, 5′→3′ direction, 111786-113774, nucleic acid sequence encoding AAs 1-663

SEQ ID NO.: 323, U74, 5′→3′ direction, 111786-113774, sequence of AAs 1-663

SEQ ID NO.: 324, genome sequence (complementary strand) of strain HST

SEQ ID NO.: 325, DRHN2R, 3′→5′ direction, 160278-160748, sequence of AAs 1-157

SEQ ID NO.: 326, DRHN1R, 3′→5′ direction, 158065-158574, sequence of AAs 1-170

SEQ ID NO.: 327, DR3R, 3′→5′ direction, 155760-156362, sequence of AAs 1-201

SEQ ID NO.: 328, RJ1, 3′→5′ direction, 153060-153407, sequence of AAs 1-116

SEQ ID NO.: 329, U100, 3′→5′ direction, 151529-151918, sequence of AAs 1-130

SEQ ID NO.: 330, U99, 3′→5′ direction, 151115-151396, sequence of AAs 1-94

SEQ ID NO.: 331, U98, 3′→5′ direction, 150376-150870, sequence of AAs 1-165

SEQ ID NO.: 332, HN2, 3′→5′ direction, 149749-149913, sequence of AAs 1-55

SEQ ID NO.: 333, U97, 3′→5′ direction, 149352-149651, sequence of AAs 1-100

SEQ ID NO.: 334, U94, 3′→5′ direction, 142683-144155, sequence of AAs 1-491

SEQ ID NO.: 335, HN1, 3′→5′ direction, 141543-142355, sequence of AAs 1-271

SEQ ID NO.: 336, U90, 3′→5′ direction, 137810-138085, sequence of AAs 1-92

SEQ ID NO.: 337, U89, 3′→5′ direction, 134808-137684, sequence of AAs 1-959

SEQ ID NO.: 338, U86, 3′→5′ direction, 127176-131717, sequence of AAs 1-1514

SEQ ID NO.: 339, U85, 3′→5′ direction, 126160-127038, sequence of AAs 1-293

SEQ ID NO.: 340, U84, 3′→5′ direction, 125104-126132, sequence of AAs 1-343

SEQ ID NO.: 341, U82, 3′→5′ direction, 123829-124581, sequence of AAs 1-251

SEQ ID NO.: 342, U81, 3′→5′ direction, 122986-123753, sequence of AAs 1-256

SEQ ID NO.: 343, U76, 3′→5′ direction, 114467-116455, sequence of AAs 1-663

SEQ ID NO.: 344, U75, 3′→5′ direction, 113379-113756, sequence of AAs 1-126

SEQ ID NO.: 345, U72, 3′→5′ direction, 108428-109462, sequence of AAs 1-345

SEQ ID NO.: 346, U66, 3′→5′ direction, 102702-103619, sequence of AAs 1-306

SEQ ID NO.: 347, U60, 3′→5′ direction, 98412-99380, sequence of AAs 1-323

SEQ ID NO.: 348, U57, 3′→5′ direction, 90999-95036, sequence of AAs 1-1346

SEQ ID NO.: 349, U56, 3′→5′ direction, 90107-90997, sequence of AAs 1-297

SEQ ID NO.: 350, U55, 3′→5′ direction, 88628-90106, sequence of AAs 1-493

SEQ ID NO.: 351, U54, 3′→5′ direction, 87171-88550, sequence of AAs 1-460

SEQ ID NO.: 352, U52, 3′→5′ direction, 84744-85343, sequence of AAs 1-200

SEQ ID NO.: 353, U48, 3′→5′ direction, 79099-81183, sequence of AAs 1-695

SEQ ID NO.: 354, U47, 3′→5′ direction, 76617-78833, sequence of AAs 1-739

SEQ ID NO.: 355, U45, 3′→5′ direction, 74977-76107, sequence of AAs 1-377

SEQ ID NO.: 356, U43, 3′→5′ direction, 71712-74294, sequence of AAs 1-861

SEQ ID NO.: 357, U42, 3′→5′ direction, 69937-71487, sequence of AAs 1-517

SEQ ID NO.: 358, U41, 3′→5′ direction, 65176-68574, sequence of AAs 1-1133

SEQ ID NO.: 359, U40, 3′→5′ direction, 62988-65168, sequence of AAs 1-727

SEQ ID NO.: 360, U38, 3′→5′ direction, 57504-60542, sequence of AAs 1-1013

SEQ ID NO.: 361, U35, 3′→5′ direction, 54893-55210, sequence of AAs 1-106

SEQ ID NO.: 362, U33, 3′→5′ direction, 52683-54095, sequence of AAs 1-471

SEQ ID NO.: 363, U32, 3′→5′ direction, 52412-52681, sequence of AAs 1-90

SEQ ID NO.: 364, U29, 3′→5′ direction, 42412-43311, sequence of AAs 1-300

SEQ ID NO.: 365, U28, 3′→5′ direction, 39975-42389, sequence of AAs 1-805

SEQ ID NO.: 366, U26, 3′→5′ direction, 37883-38770, sequence of AAs 1-296

SEQ ID NO.: 367, U25, 3′→5′ direction, 36825-37775, sequence of AAs 1-317

SEQ ID NO.: 368, U24, 3′→5′ direction, 36350-36616, sequence of AAs 1-89

SEQ ID NO.: 369, U23, 3′→5′ direction, 35326-36225, sequence of AAs 1-300

SEQ ID NO.: 370, U21, 3′→5′ direction, 33291-34793, sequence of AAs 1-501

SEQ ID NO.: 371, U20, 3′→5′ direction, 31984-33288, sequence of AAs 1-435

SEQ ID NO.: 372, U19, 3′→5′ direction, 30592-31761, sequence of AAs 1-390

SEQ ID NO.: 373, U18, 3′→5′ direction, 29443-30327, sequence of AAs 1-295

SEQ ID NO.: 374, U17, 3′→5′ direction, 28003-28263, sequence of AAs 1-87

SEQ ID NO.: 375, U16, 3′→5′ direction, 27172-27603, sequence of AAs 1-144

SEQ ID NO.: 376, U15, 3′→5′ direction, 26559-26891, sequence of AAs 1-111

SEQ ID NO.: 377, U11, 3′→5′ direction, 19801-22377, sequence of AAs 1-859

SEQ ID NO.: 378, U8, 3′→5′ direction, 16806-18041, sequence of AAs 1-412

SEQ ID NO.: 379, U7, 3′→5′ direction, 15678-16802, sequence of AAs 1-375

SEQ ID NO.: 380, U5, 3′→5′ direction, 14002-15333, sequence of AAs 1-444

SEQ ID NO.: 381, U4, 3′→5′ direction, 12276-13883, sequence of AAs 1-536

SEQ ID NO.: 382, U3, 3′→5′ direction, 10891-12051, sequence of AAs 1-387

SEQ ID NO.: 383, U2, 3′→5′ direction, 9467-10768, sequence of AAs 1-434

SEQ ID NO.: 384, LJ1, 3′→5′ direction, 8292-8807, sequence of AAs 1-172

SEQ ID NO.: 385, DRHN2, 3′→5′ direction, 7236-7706, sequence of AAs 1-157

SEQ ID NO.: 386, DRHN1, 3′→5′ direction, 5023-5532, sequence of AAs 1-170

SEQ ID NO.: 387, DR3, 3′→5′ direction, 2718-3320, sequence of AAs 1-201

SEQ ID NO.: 388, LT1, 3′→5′ direction, 18-365, sequence of AAs 1-116

SEQ ID NO.: 389, U9, 3′→5′ direction, 18022-18336, nucleic acid sequence encoding Ms 1-105

SEQ ID NO.: 390, U9, 3′→5′ direction, 18022-18336, sequence of AAs 1-105

SEQ ID NO.: 391, U22, 3′→5′ direction, 34690-35298, nucleic acid sequence encoding Ms 1-203

SEQ ID NO.: 392, U22, 3′→5′ direction, 34690-35298, sequence of AAs 1-203

SEQ ID NO.: 393, U27, 3′→5′ direction, 38758-39933, nucleic acid sequence encoding AAs 1-392

SEQ ID NO.: 394, U27, 3′→5′ direction, 38758-39933, sequence of Ms 1-392

SEQ ID NO.: 395, U34, 3′→5′ direction, 54046-54876, nucleic acid sequence encoding Ms 1-277

SEQ ID NO.: 396, U34, 3′→5′ direction, 54046-54876, sequence of Ms 1-277

SEQ ID NO.: 397, U39, 3′→5′ direction, 60542-63034, nucleic acid sequence encoding Ms 1-831

SEQ ID NO.: 398, U39, 3′→5′ direction, 60542-63034, sequence of Ms 1-831

SEQ ID NO.: 399, U61, 3′→5′ direction, 99355-99867, nucleic acid sequence encoding Ms 1-171

SEQ ID NO.: 400, U61, 3′→5′ direction, 99355-99867, sequence of AAs 1-171

SEQ ID NO.: 401, BAC vector sequence

SEQ ID NO.: 402, primer BAC7-E1

SEQ ID NO.: 403, primer BAC7-E2

SEQ ID NO.: 404, primer BAC7-E3

SEQ ID NO.: 405, primer BAC7-E4

Claims

1. A method of treatment, prevention, or therapy of infectious disease comprising:

infecting a T lymphoid cell with a vector comprising a human herpesvirus genome, comprising an essential gene and a non-essential region and a BAC vector sequence linked to the herpesvirus genome, wherein the BAC vector sequence is inserted into a non-essential region of a herpesvirus genome, and wherein the non-essential region is a non-essential region of HHV-7 or HHV-6.