Abstract: A peptide domain necessary for an interaction between an envelope of a virus belonging to an HERV-W interference group and an hASCT receptor comprises (i) an N-terminus motif having an amino acid sequence selected from the group consisting of: SEQ ID No. 1 to SEQ ID No. 29, (ii) a C-terminus motif having an amino acid sequence selected from the group consisting of: SEQ ID No. 30 to SEQ ID No. 40, and (iii) at least one motif between the N-terminus and the C-terminus, and having an amino acid sequence selected from the group consisting of: SEQ ID No. 41, SEQ ID No. 42 and SEQ ID No. 73.

Abstract: A peptide domain necessary for an interaction between an envelope of a virus belonging to an HERV-W interference group and an hASCT receptor comprises (i) an N-terminus motif having an amino acid sequence selected from the group consisting of: SEQ ID No. 1 to SEQ ID No. 29, (ii) a C-terminus motif having an amino acid sequence selected from the group consisting of: SEQ ID No. 30 to SEQ ID No. 40, and (iii) at least one motif between the N-terminus and the C-terminus, and having an amino acid sequence selected from the group consisting of: SEQ ID No. 41, SEQ ID No. 42 and SEQ ID No. 73.

Abstract: RNA may be transcribed using a nucleotide reagent as the promoter. The reagent may enable RNA to be transcribed without sequence specification and without protein cofactors, by means of an RNA polymerase that is known to be DNA-dependent such as the RNA polymerase of the phage T7, or by means of new, mutated RNA polymerase with the ability to synthesize a transcription product of polynucleotide matrix with a higher yield when the matrix is RNA than when the matrix is DNA. This type of RNA polymerase can be obtained by effecting mutations on a coding gene for a wild-type RNA polymerase, and then by selecting the mutated RNA polymerase with the ability. The invention can be applied notably to the detection, synthesis or quantification of RNA.

Abstract: The invention relates to a peptide domain required for interaction between the envelope of a virus pertaining to the HERV-W interference group and a hASCT receptor, comprising an N end point and a C end point. Said peptide domain is defined, at the N end point thereof, by a pattern formed by the amino acids L (Z)-proline-cysteine-X-cysteine in which Z is any amino acid, is a whole number between 2 and 30, and X is any amino acid, and at the C end point thereof, by a pattern formed by the amino acids serine-aspartic acid-Xa-Xb-Xc-Xd-Xe-aspartic acid-Xf-Xg-(Z) in which Xa, Xb, Xc, Xd, Xe, Xf, Xg are any amino acids, Z is any amino acid, B is a whole number between 15 and 25, preferably 20.

Abstract: RNA may be transcribed using a nucleotide reagent as the promoter. The reagent may enable RNA to be transcribed without sequence specification and without protein cofactors, by means of an RNA polymerase that is known to be DNA-dependent such as the RNA polymerase of the phage T7, or by means of new, mutated RNA polymerase with the ability to synthesize a transcription product of polynucleotide matrix with a higher yield when the matrix is RNA than when the matrix is DNA. This type of RNA polymerase can be obtained by effecting mutations on a coding gene for a wild-type RNA polymerase, and then by selecting the mutated RNA polymerase with the ability. The invention can be applied notably to the detection, synthesis or quantification of RNA.

Abstract: The invention concerns a nucleotide sequence coding for a modified protein of interest, said protein of interest having, after purification and immobilization, at least the same biological activity as the native protein of interest and being directly usable, said sequence comprising at least a gene coding for said protein of interest, a nucleotide fragment, called polyK, coding for a succession of at least six lysine residues, and a nucleotide fragment, called polyH, coding for a succession of at least six histidine residues; a vector comprising such a sequence; and a method for obtaining a purifiable and immobilized modified protein of interest.

Abstract: Disclosed is a process for transcribing RNA using a nucleotide reagent as the promoter. Such a reagent enables any type of RNA to be transcribed without sequence specification and without protein cofactors, by means of an RNA polymerase that is known to be DNA-dependent such as the RNA polymerase of the phage T7, or by means of new, mutated RNA polymerase with the ability to synthesize a transcription product of a polynucleotide matrix with a higher yield when the matrix is RNA than when said matrix is DNA. This type of RNA polymerase can be obtained by effecting mutations on a coding gene for a wild-type RNA polymerase, and then by selecting the mutated RNA polymerase with said ability. The invention can be applied notably to the detection, synthesis or quantification of RNA.