Patents Assigned to GlycoFi, Inc
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Patent number: 8507224Abstract: Lower eukaryote host cells in which an endogenous or heterologous Ca2+ ATPase is overexpressed are described. Also described are lower eukaryote host cells in which a calreticulin and/or ERp57 protein are overexpressed. These host cells are useful for producing recombinant glycoproteins that have reduced O-glycosylation.Type: GrantFiled: August 10, 2009Date of Patent: August 13, 2013Assignee: GlycoFi, Inc.Inventor: Byung-Kwon Choi
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Patent number: 8501438Abstract: A method is described for producing protein compositions having reduced amounts of O-linked glycosylation. The method includes producing the protein in cells cultured in the presence of an inhibitor of Pmt-mediated O-linked glycosylation and/or in the presence of one or more ?-1,2-mannosidases.Type: GrantFiled: May 31, 2012Date of Patent: August 6, 2013Assignee: GlycoFi, Inc.Inventors: Piotr Bobrowicz, W. James Cook, Warren Kett
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Publication number: 20130018177Abstract: The present invention relates to eukaryotic host cells which have been modified to produce sialylated glycoproteins by the heterologous expression of a set of glycosyltransferases, including sialyltransferase and/or trans-sialidase, to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. Novel eukaryotic host cells expressing a CMP-sialic acid biosynthetic pathway for the production of sialylated glycoproteins are also provided. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities (such as those involved in sialylation) to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation.Type: ApplicationFiled: July 20, 2012Publication date: January 17, 2013Applicant: GlycoFi, Inc.Inventor: Stephen R. Hamilton
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Publication number: 20120322101Abstract: A method is described for producing protein compositions having reduced amounts of O-linked glycosylation. The method includes producing the protein in cells cultured in the presence of an inhibitor of Pmt-mediated O-linked glycosylation and/or in the presence of one or more ?-1,2-mannosidases.Type: ApplicationFiled: June 22, 2012Publication date: December 20, 2012Applicant: GLYCOFI, INC.Inventors: Piotr Bobrowicz, W. James Cook, Warren Kett
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Publication number: 20120322100Abstract: Cell lines having genetically modified glycosylation pathways that allow them to carry out a sequence of enzymatic reactions, which mimic the processing of glycoproteins I humans, have been developed. Recombinant proteins expressed in these engineered hosts yield glycoproteins more similar, if not substantially identical, to their human counterparts. The lower eukaryotes, which ordinarily produce high-mannose containing N-glycans such as Man5GlcNAC2 or other structures along human glycosylation pathways.Type: ApplicationFiled: May 1, 2012Publication date: December 20, 2012Applicant: Glycofi, Inc.Inventor: TILLMAN U. GERNGROSS
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Patent number: 8298811Abstract: A method for producing human-like glycoproteins by expressing a Class 2 ?-mannosidase having a substrate specificity for Man?1,3 and Man?1,6 glycosidic linkages in a lower eukaryote is disclosed. Hydrolysis of these linkages on oligosaccharides produces substrates for further N-glycan processing in the secretory pathway.Type: GrantFiled: August 6, 2009Date of Patent: October 30, 2012Assignee: Glycofi, Inc.Inventor: Stephen Hamilton
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Patent number: 8299228Abstract: A method for producing human-like glycoproteins by expressing a Class 2 ?-mannosidase having a substrate specificity for Man?1,3 and Man?1,6 glycosidic linkages in a lower eukaryote is disclosed. Hydrolysis of these linkages on oligosaccharides produces substrates for further N-glycan processing in the secretory pathway.Type: GrantFiled: August 6, 2009Date of Patent: October 30, 2012Assignee: Glycofi, Inc.Inventor: Stephen Hamilton
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Publication number: 20120237973Abstract: A method is described for producing protein compositions having reduced amounts of O-linked glycosylation. The method includes producing the protein in cells cultured in the presence of an inhibitor of Pmt-mediated O-linked glycosylation and/or in the presence of one or more ?-1,2-mannosidases.Type: ApplicationFiled: May 31, 2012Publication date: September 20, 2012Applicant: GLYCOFI, INC.Inventors: Piotr Bobrowicz, W. James Cook, Warren Kett
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Patent number: 8268609Abstract: The present invention relates to eukaryotic host cells which have been modified to produce sialylated glycoproteins by the heterologous expression of a set of glycosyltransferases, including sialyltransferase and/or trans-sialidase, to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. Novel eukaryotic host cells expressing a CMP-sialic acid biosynthetic pathway for the production of sialylated glycoproteins are also provided. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities (such as those involved in sialylation) to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation.Type: GrantFiled: June 21, 2010Date of Patent: September 18, 2012Assignee: Glycofi, Inc.Inventor: Stephen R. Hamilton
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Patent number: 8211691Abstract: Cell lines having genetically modified glycosylation pathways that allow them to carry out a sequence of enzymatic reactions, which mimic the processing of glycoproteins in humans, have been developed. Recombinant proteins expressed in these engineered hosts yield glycoproteins more similar to their human counterparts. The lower eukaryotes, which ordinarily produce high-mannose containing N-glycans, including unicellular and multicellular fungi are modified to produce N-glycans such as Man5GlcNAc2 or other structures along human glycosylation pathways.Type: GrantFiled: October 30, 2007Date of Patent: July 3, 2012Assignee: Glycofi, Inc.Inventor: Tillman U. Gerngross
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Patent number: 8206949Abstract: A method is described for producing protein compositions having reduced amounts of O-linked glycosylation. The method includes producing the protein in cells cultured in the presence of an inhibitor of Pmt-mediated O-linked glycosylation and/or in the presence of one or more ?-1,2-mannosidases.Type: GrantFiled: November 10, 2006Date of Patent: June 26, 2012Assignee: GlycoFi, Inc.Inventors: Piotr Bobrowicz, W. James Cook, Warren Kett
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Publication number: 20120116058Abstract: A novel gene encoding P. pastoris orotate-phosphoribosyl transferase (URA5) is disclosed. Methods for producing and selecting yeast strains capable of stable genetic integration of heterologous sequences into the host genome are also provided.Type: ApplicationFiled: October 7, 2011Publication date: May 10, 2012Applicant: Glycofi, Inc.Inventor: Juergen H. Nett
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Patent number: 8158384Abstract: The present invention provides methods to reduce or eliminate ?-mannosidase resistant glycans on glycoproteins in yeast. The reduction or elimination of ?-mannosidase resistant glycans on glycoproteins results from the disruption of the newly isolated P. pastoris AMR2 gene encoding ?1,2-mannosyltransferase. The present invention also discloses novel genes, polypeptides, antibodies, vectors and host cells relating to ?-mannosidase resistance on glycans.Type: GrantFiled: July 8, 2008Date of Patent: April 17, 2012Assignee: Glycofi, Inc.Inventor: Piotr Bobrowicz
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Patent number: 8137954Abstract: Methods and materials are provided for the production of compositions of erythropoietin protein, wherein said compositions comprise a pre-selected N-linked glycosylation pattern as the predominant N-glycoform.Type: GrantFiled: May 13, 2010Date of Patent: March 20, 2012Assignee: Glycofi, Inc.Inventors: Natarajan Sethuraman, Juergen Nett, Robert Davidson
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Publication number: 20120064568Abstract: The present invention generally relates to methods of modifying the glycosylation structures of recombinant proteins expressed in fungi or other lower eukaryotes, to more closely resemble the glycosylation of proteins from higher mammals, in particular humans. The present invention also relates to novel enzymes and, nucleic acids encoding them and, hosts engineered to express the enzymes, methods for producing modified glycoproteins in hosts and modified glycoproteins so produced.Type: ApplicationFiled: March 24, 2011Publication date: March 15, 2012Applicant: Glycofi, Inc.Inventor: Stephen Hamilton
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Publication number: 20120052530Abstract: The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g.Type: ApplicationFiled: June 9, 2011Publication date: March 1, 2012Applicant: GlycoFi, Inc.Inventors: TILLMAN U. GERNGROSS, Stefan Wildt, Byung-kwon Choi, Juergen Hermann Nett, Piotr Bobrowicz, Stephen R. Hamilton, Robert C. Davidson
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Patent number: 8067551Abstract: The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g.Type: GrantFiled: November 7, 2008Date of Patent: November 29, 2011Assignee: Glycofi, Inc.Inventors: Tillman U. Gerngross, Stefan Wildt, Byung-Kwon Choi, Juergen Hermann Nett, Piotr Bobrowicz, Stephen R Hamilton, Robert C. Davidson
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Patent number: 8062879Abstract: A novel gene encoding P. pastoris orotate-phosphoribosyl transferase (URA5) is disclosed. Methods for producing and selecting yeast strains capable of stable genetic integration of heterologous sequences into the host genome are also provided.Type: GrantFiled: January 22, 2009Date of Patent: November 22, 2011Assignee: Glycofi, Inc.Inventor: Juergen H. Nett
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Patent number: 7981660Abstract: Cell lines having genetically modified glycosylation pathways that allow them to carry out a sequence of enzymatic reactions, which mimic the processing of glycoproteins in humans, have been developed. Recombinant proteins expressed in these engineered hosts yield glycoproteins more similar, if not substantially identical, to their human counterparts. The lower eukaryotes, which ordinarily produce high-mannose containing N-glycans, including unicellular and multicellular fungi are modified to produce N-glycans such as Man5GlcNAc2 or other structures along human glycosylation pathways.Type: GrantFiled: August 27, 2009Date of Patent: July 19, 2011Assignee: Glycofi, Inc.Inventor: Tillman U. Gerngross
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Patent number: 7935513Abstract: The present invention relates to eukaryotic host cells having modified oligosaccharides which may be modified further by heterologous expression of a set of glycosyltransferases, sugar transporters and mannosidases to become host-strains for the production of mammalian, e.g., human therapeutic glycoproteins. The invention provides nucleic acid molecules and combinatorial libraries which can be used to successfully target and express mammalian enzymatic activities such as those involved in glycosylation to intracellular compartments in a eukaryotic host cell. The process provides an engineered host cell which can be used to express and target any desirable gene(s) involved in glycosylation. Host cells with modified oligosaccharides are created or selected. N-glycans made in the engineered host cells have a Man5GlcNAc2 core structure which may then be modified further by heterologous expression of one or more enzymes, e.g.Type: GrantFiled: June 5, 2008Date of Patent: May 3, 2011Assignee: Glycofi, Inc.Inventors: Tillman U. Gerngross, Stefan Wildt, Byung-Kwon Choi, Juergen Hermann Nett, Piotr Bobrowicz, Stephen R. Hamilton, Robert C. Davidson