Patents by Inventor Walter Pollak
Walter Pollak 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: 8815566Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.Type: GrantFiled: July 17, 2013Date of Patent: August 26, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Publication number: 20140155578Abstract: Variant sucrose transporter polypeptides that enable bacterial growth over a wide range of gene expression levels and sucrose concentrations are described.Type: ApplicationFiled: February 6, 2014Publication date: June 5, 2014Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Dana Michelle Walters Pollak, Tina K. VAN DYK
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Publication number: 20140147899Abstract: Variant sucrose transporter polypeptides that enable bacterial growth over a wide range of gene expression levels and sucrose concentrations are described.Type: ApplicationFiled: February 6, 2014Publication date: May 29, 2014Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Dana Michelle Walters Pollak, Tina K. VAN DYK
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Patent number: 8686114Abstract: Variant sucrose transporter polypeptides that enable bacterial growth over a wide range of gene expression levels and sucrose concentrations are described. Additionally, recombinant bacteria comprising these variant sucrose transporter polypeptides, and methods of utilizing the bacteria to produce products such as glycerol and glycerol-derived products are provided.Type: GrantFiled: March 5, 2012Date of Patent: April 1, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Dana Michelle Walters Pollak, Tina K Van Dyk
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Patent number: 8658413Abstract: Mutant delta-5 desaturases, having the ability to convert dihomo-gamma-linolenic acid [DGLA; 20:3 omega-6] to arachidonic acid [ARA; 20:4 omega-6] and/or eicosatetraenoic acid [ETA; 20:4 omega-3] to eicosapentaenoic acid [EPA; 20:5 omega-3] and possessing at least one mutation within the HPGG (SEQ ID NO:7) motif of the cytochome b5-like domain and at least one mutation within the HDASH (SEQ ID NO:8) motif are disclosed. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”], are also disclosed.Type: GrantFiled: August 26, 2011Date of Patent: February 25, 2014Assignee: E I du Pont de Nemours and CompanyInventors: Melissa D. Bosak, Michael W. Bostick, Hongxian He, Seung-Pyo Hong, Dana M. Walters Pollak, Pamela L. Sharpe, Yehong Jamie Wang, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Publication number: 20140030772Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.Type: ApplicationFiled: July 17, 2013Publication date: January 30, 2014Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Patent number: 8614075Abstract: The present invention relates to mutant ?5 desaturases, which have the ability to convert dihomo-?-linolenic acid [DGLA; 20:3 ?-6] to arachidonic acid [ARA; 20:4 ?-6] and/or eicosatetraenoic acid [ETA; 20:4 ?-3] to eicosapentaenoic acid [EPA; 20:5 ?-3] and which possess at least one mutation within the HPGG motif of the cytochome b5-like domain. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant ?5 desaturases in oleaginous yeast, are disclosed.Type: GrantFiled: January 8, 2013Date of Patent: December 24, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Quinn Qun Zhu, Dana M. Walters Pollak
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Publication number: 20130230892Abstract: Variant sucrose transporter polypeptides that enable bacterial growth over a wide range of gene expression levels and sucrose concentrations are described.Type: ApplicationFiled: March 5, 2012Publication date: September 5, 2013Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: DANA MICHELLE WALTERS POLLAK, TINA K. VAN DYK
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Patent number: 8518674Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.Type: GrantFiled: September 29, 2010Date of Patent: August 27, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Patent number: 8367383Abstract: The present invention relates to mutant ?5 desaturases, which have the ability to convert dihomo-?-linolenic acid [DGLA; 20:3 ?-6] to arachidonic acid [ARA; 20:4 ?-6] and/or eicosatetraenoic acid [ETA; 20:4 ?-3] to eicosapentaenoic acid [EPA; 20:5 ?-3] and which possess at least one mutation within the HPGG motif of the cytochome b5-like domain. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant ?5 desaturases in oleaginous yeast, are disclosed.Type: GrantFiled: August 14, 2012Date of Patent: February 5, 2013Assignee: E I du Pont de Nemours and CompanyInventors: Quinn Qun Zhu, Dana M. Walters Pollak
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Publication number: 20120309064Abstract: The present invention relates to mutant ?5 desaturases, which have the ability to convert dihomo-?-linolenic acid [DGLA; 20:3 ?-6] to arachidonic acid [ARA; 20:4 ?-6] and/or eicosatetraenoic acid [ETA; 20:4 ?-3] to eicosapentaenoic acid [EPA; 20:5 ?-3] and which possess at least one mutation within the HPGG motif of the cytochome b5-like domain. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant ?5 desaturases in oleaginous yeast, are disclosed.Type: ApplicationFiled: August 14, 2012Publication date: December 6, 2012Applicant: E I DU PONT DE NEMOURS AND COMPANYInventors: Quinn Qun Zhu, Dana M. Walters Pollak
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Patent number: 8268598Abstract: The present invention relates to mutant ?5 desaturases, which have the ability to convert dihomo-?-linolenic acid [DGLA; 20:3 ?-6] to arachidonic acid [ARA; 20:4 ?-6] and/or eicosatetraenoic acid [ETA; 20:4 ?-3] to eicosapentaenoic acid [EPA; 20:5 ?-3] and which possess at least one mutation within the HPGG motif of the cytochrome b5-like domain. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant ?5 desaturases in oleaginous yeast, are disclosed.Type: GrantFiled: September 18, 2009Date of Patent: September 18, 2012Assignee: E I du Pont de Nemours and CompanyInventors: Quinn Qun Zhu, Dana M. Walters Pollak
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Publication number: 20120052549Abstract: Mutant delta-5 desaturases, having the ability to convert dihomo-gamma-linolenic acid [DGLA; 20:3 omega-6] to arachidonic acid [ARA; 20:4 omega-6] and/or eicosatetraenoic acid [ETA; 20:4 omega-3] to eicosapentaenoic acid [EPA; 20:5 omega-3] and possessing at least one mutation within the HPGG (SEQ ID NO:7) motif of the cytochome b5-like domain and at least one mutation within the HDASH (SEQ ID NO:8) motif are disclosed. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”], are also disclosed.Type: ApplicationFiled: August 26, 2011Publication date: March 1, 2012Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Melissa D. Bosak, Michael W. Bostick, Hongxian He, Seung-Pyo Hong, Dana M. Walters Pollak, Pamela L. Sharpe, Yehong Jamie Wang, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Patent number: 7932077Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.Type: GrantFiled: November 2, 2005Date of Patent: April 26, 2011Assignee: E. I. du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Publication number: 20110086919Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 25% eicosapentaenoic acid (EPA, an ?-3 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of EPA. Production host cells are claimed, as are methods for producing EPA within said host cells.Type: ApplicationFiled: September 29, 2010Publication date: April 14, 2011Applicant: E. I. Du Pont De Nemours and CompanyInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Patent number: 7695950Abstract: The present invention relates to a ?5 desaturase, which has the ability to convert dihomo-?-linolenic acid (DGLA; 20:3 ?-6) to arachidonic acid (ARA; 20:4 ?-6) and/or eicosatetraenoic acid (ETA; 20:4 ?-3) to eicosapentaenoic acid (EPA; 20:5 ?-3). Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturase along with a method of making long chain polyunsaturated fatty acids (PUFAs) using this ?5 desaturase in oleaginous yeast are disclosed.Type: GrantFiled: May 15, 2007Date of Patent: April 13, 2010Assignee: E. I. du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Dana M. Walters Pollak, Zhixiong Xue, Quinn Qun Zhu
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Publication number: 20100075386Abstract: The present invention relates to mutant ?5 desaturases, which have the ability to convert dihomo-?-linolenic acid [DGLA; 20:3 ?-6] to arachidonic acid [ARA; 20:4 ?-6] and/or eicosatetraenoic acid [ETA; 20:4 ?-3] to eicosapentaenoic acid [EPA; 20:5 ?-3] and which possess at least one mutation within the HPGG motif of the cytochrome b5-like domain. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”] using these mutant ?5 desaturases in oleaginous yeast, are disclosed.Type: ApplicationFiled: September 18, 2009Publication date: March 25, 2010Applicant: E.I. DU PONT DE NEMOURS AND COMPANYInventors: Quinn Qun Zhu, Dana M. Walters Pollak
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Patent number: 7678560Abstract: The present invention relates to a ?5 desaturase, which has the ability to convert dihomo-?-linolenic acid (DGLA; 20:3 ?-6) to arachidonic acid (ARA; 20:4 ?-6) and/or eicosatetraenoic acid (ETA; 20:4 ?-3) to eicosapentaenoic acid (EPA; 20:5 ?-3). Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding ?5 desaturase along with a method of making long chain polyunsaturated fatty acids (PUFAs) using this ?5 desaturase in oleaginous yeast are disclosed.Type: GrantFiled: May 15, 2007Date of Patent: March 16, 2010Assignee: E.I. du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Dana M. Walters Pollak, Zhixiong Xue, Quinn Qun Zhu
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Publication number: 20100022647Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 10% arachidonic acid (ARA, an ?-6 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases, and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of ARA. Production host cells are claimed, as are methods for producing ARA within said host cells.Type: ApplicationFiled: July 30, 2009Publication date: January 28, 2010Applicant: E. I. DU PONT DE NEMOURS AND COMPANYInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu
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Patent number: 7588931Abstract: Engineered strains of the oleaginous yeast Yarrowia lipolytica capable of producing greater than 10% arachidonic acid (ARA, an ?-6 polyunsaturated fatty acid) in the total oil fraction are described. These strains comprise various chimeric genes expressing heterologous desaturases, elongases and acyltransferases, and optionally comprise various native desaturase and acyltransferase knockouts to enable synthesis and high accumulation of ARA. Production host cells are claimed, as are methods for producing ARA within said host cells.Type: GrantFiled: November 1, 2005Date of Patent: September 15, 2009Assignee: E. I. du Pont de Nemours and CompanyInventors: Howard Glenn Damude, Peter John Gillies, Daniel Joseph Macool, Stephen K. Picataggio, Dana M. Walters Pollak, James John Ragghianti, Zhixiong Xue, Narendra S. Yadav, Hongxiang Zhang, Quinn Qun Zhu