Patents by Inventor Gerard Venema
Gerard Venema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7312311Abstract: The invention relates to surface display of proteins on microorganisms via the targeting and anchoring of heterologous proteins to the outer surface of cells such as yeast, fungi, mammalian, plant cells, and bacteria. The invention provides a proteinaceous substance comprising a reactive group and at least one attaching peptide including a stretch of amino acids having a sequence corresponding to at least a part of the consensus amino acid sequence listed in FIG. 10 and further includes a method for attaching a proteinaceous substance to the cell wall of a microorganism comprising the use of the attaching peptide.Type: GrantFiled: October 30, 2006Date of Patent: December 25, 2007Assignee: Applied Nanosystems B.V.Inventors: Girbe Buist, Cornelis J. Leenhouts, Gerard Venema, Jan Kok
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Publication number: 20070104724Abstract: The invention relates to surface display of proteins on microorganisms via the targeting and anchoring of heterologous proteins to the outer surface of cells such as yeast, fungi, mammalian, plant cells, and bacteria. The invention provides a proteinaceous substance comprising a reactive group and at least one attaching peptide including a stretch of amino acids having a sequence corresponding to at least a part of the consensus amino acid sequence listed in FIG. 10 and further includes a method for attaching a proteinaceous substance to the cell wall of a microorganism comprising the use of the attaching peptide.Type: ApplicationFiled: October 30, 2006Publication date: May 10, 2007Inventors: Girbe Buist, Cornelis Leenhouts, Gerard Venema, Jan Kok
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Patent number: 7169383Abstract: The invention relates to surface display of proteins on micro-organisms via the targeting and anchoring of heterologous proteins to the outer surface of cells such as yeast, fungi, mammalian and plant cells, and bacteria. The invention provides a proteinaceous substance comprising a reactive group and at least one attaching peptide which comprises a stretch of amino acids having a sequence corresponding to at least a part of the consensus amino acid sequence listed in FIG. 10 and comprises a method for attaching a proteinaceous substance to the cell wall of a micro-organism comprising the use of said attaching peptide.Type: GrantFiled: November 12, 1998Date of Patent: January 30, 2007Assignee: Applied Nanosystems B.V.Inventors: Girbe Buist, Cornelis Johannes Leenhouts, Gerard Venema, Jan Kok
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Publication number: 20050169937Abstract: The invention relates to surface display of proteins on microorganisms via the targeting and anchoring of heterologous proteins to the outer surface of cells such as yeast, fungi, mammalian, plant cells, and bacteria. The invention provides a proteinaceous substance comprising a reactive group and at least one attaching peptide including a stretch of amino acids having a sequence corresponding to at least a part of the consensus amino acid sequence listed in FIG. 10 and further includes a method for attaching a proteinaceous substance to the cell wall of a microorganism comprising the use of the attaching peptide.Type: ApplicationFiled: September 3, 2003Publication date: August 4, 2005Inventors: Girbe Buist, Cornelis Leenhouts, Gerard Venema, Jan Kok
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Patent number: 6518054Abstract: The present invention provides genes encoding variants of metallo-endopeptidases that have been engineered to be resistant to prolonged boiling while having maintained their enzymatic performance at much lower temperatures. In addition, thermal stability of the metallo-endopeptidases is highly dependent on calcium at concentrations in the mM range. The invention further provides active metallo-endopeptidases variants whose stability depending on calcium concentration can be changed so as to provide metallo-endopeptidases that are calcium dependent or independent. The invention also provides genes that encode boiling-resistant metallo-endopetidases whose stability depending on calcium concentration can be changed. The invention also provides vectors and cells comprising these genes and proteases produced through these genes, vectors and/or cells.Type: GrantFiled: December 7, 1999Date of Patent: February 11, 2003Assignee: Rijksuniverstteit Te GroningenInventors: Lambertus Van den Burg, Oene Robert Veltman, Gerard Venema
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Patent number: 6143525Abstract: The invention provides a complex inducible promoter system from a phage of a lactic acid bacterium, especially one having the DNA sequence of SEQ. ID. No: 3 given in FIG. 2, or a DNA sequence essentially corresponding to those sequences, and a modification of (an essential part of) such promoter system in which the mitomycin C induction system is replaced by a good-grade system, e.g. a temperature-initiated induction system or a salt-initiated induction system. Also is provided a recombinant vector and a transformed lactic acid bacterium comprising (an essential part of) such promoter system. Further a process for producing a desired protein by such transformed bacterium is provided, comprising expressing a gene encoding said desired protein or a precursor thereof under control of such promoter system or an essential part thereof. Preferably, the transformed lactic acid bacterium is made food-grade due to using food-grade DNA sequences and/or removing non-food-grade DNA sequences.Type: GrantFiled: April 3, 1997Date of Patent: November 7, 2000Assignee: Quest International B.V.Inventors: Arjan Nauta, Gerard Venema, Jan Kok, Adrianus Marinus Ledeboer
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Patent number: 6140078Abstract: The invention provides a salt-inducible promoter present in SEQ ID NO: 10 and derivable from a lactic acid bacterium in isolation from the coding sequence normally controlled by said promoter in a wild-type lactic acid bacterium, with modifications and important parts thereof. Also provided are a recombinant vector and a transformed lactic acid bacterium comprising such promoter, and the production of a desired protein by such transformed bacterium, whereby the gene encoding said desired protein or a precursor thereof is expressed under control of such promoter. The desired protein can be secreted by the bacterium due to the presence of a signal sequence. The action of the salt-inducible promoter is enhanced at a pH of about 4-4.5 and/or by the presence of glutamic acid. Such process can be used in a fermentation process, in which the desired protein is a lytic protein causing lysis of the cells and release of the cell content. Or the desired protein can be an enzyme involved in flavour formation, e.g.Type: GrantFiled: July 29, 1998Date of Patent: October 31, 2000Assignee: Unilever Patent HoldingsInventors: Jan W. Sanders, Jan Kok, Gerard Venema, Adrianus M Ledeboer
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Patent number: 5955258Abstract: The invention provides a process for the lysis of a culture of lactic acid bacteria, or a product containing such culture e.g. cheese, by means of a lysin through the in situ production of a homologous autolysin, or a heterologous autolysin obtainable from Gram-positive bacteria esp. from lactic acid bacteria. The gene encoding said autolysin is controlled by a promoter, preferably regulated by food-grade ingredients or parameters, to achieve an enhanced lysis after induction resulting in an enhanced production of total autolysin compared with the natural production lever of the homologous autolysin during fermentation or shortly thereafter. Other uses of the invention include preparing a mixture of peptides which are modified by peptidases freed after the lysis, using the autolysin as a bactericidal agent against spoiling bacteria or pathogenic bacteria for improving the shelf life of a product containing the lysed culture.Type: GrantFiled: April 22, 1997Date of Patent: September 21, 1999Assignee: Quest International B.V.Inventors: Girbe Buist, Gerard Venema, Jan Kok, Adrianus Marinus Ledeboer
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Patent number: 5683909Abstract: The claimed invention is drawn to a recombinant plasmid which can replicate in Bacillus subtilis, Escherichia coli, and lactic acid Streptococcus bacteria comprising the replication of origin from Streptococcus cremoris plasmid pWV01 as its origin of replication, in addition to coding marker genes and genes of interest which code for improved fermenting properties.Type: GrantFiled: October 12, 1993Date of Patent: November 4, 1997Assignee: Van Den Bergh Foods Company, Division of Conopco, Inc.Inventors: Jan Kok, Jan Maat, Josephus Mauritius van der Vossen, Gerard Venema
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Patent number: 5246838Abstract: The subject invention describes the cloning and overexpression of leader peptidase genes. A method for isolating a leader peptidase gene is disclosed. Overexpression of the signal peptidase in a suitable host species leads to an enhanced rate of protein processing.Type: GrantFiled: February 28, 1991Date of Patent: September 21, 1993Assignee: Gist-brocades, N.V.Inventors: Jan M. Van Dijl, Hilde E. Smith, Sierd Bron, Wilhelmus J. Quax, Gerard Venema
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Patent number: 5212070Abstract: Novel vectors are provided for identifying secretory signal sequences from DNA fragments of unicellular microorganisms. The plasmids comprise a multiple cloning site with restriction sites in reading frame with a structural gene which permits rapid screening of the secreted expression product. Optionally, the vectors may include a promoter region upstream from the multiple cloning site. The invention is exemplified with Bacillus. Specific secretory signal sequences have been isolated with those vectors, allowing for efficient secretion into the supernatant, and not just to the periplasmic space to provide proteins in economically high yields. Secretory sequences are provided superior to other previously known sequences.Type: GrantFiled: December 13, 1990Date of Patent: May 18, 1993Assignee: Gist-brocadesInventors: Hilde E. Smith, Jan H. Van Ee, Ben P. H. Peeters, Sierd Bron, Gerard Venema
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Patent number: 5037760Abstract: Novel vectors are provided for identifying secretory signal sequences from DNA fragments of unicellular microorganisms. The plasmids comprise a multiple cloning site with restriction sites in reading frame with a structural gene which permits rapid screening of the screted expression product. Optionally, the vectors may include a promoter region upstream from the multiple cloning site. The invention is exemplified with Bacillus. Specific secretory signal sequence have been isolated with those vectors, allowing for efficient secretion into the supernatant, and not just to the periplasmic space to provide proteins in economically high yields. Secretory sequences are provided superior to other previously known sequences.Type: GrantFiled: May 1, 1987Date of Patent: August 6, 1991Assignee: Gist-Brocades NVInventors: Hilde E. Smith, Jan H. Van Ee, Ben P. H. Peeters, Sierd Bron, Gerard Venema