Patents by Inventor Aaron Adriaan Winkler
Aaron Adriaan Winkler 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: 10927399Abstract: The present invention relates to a method of identifying a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol of) a yeast cell comprising: a) providing a mutated yeast cell comprising a deletion of at least one gene of the (PDH) by-pass, selected from the genes encoding the enzymes pyruvate decarboxylase (PDC), acetaldehyde dehydrogenase (ALD), and acetyl-CoA synthetase (ACS); b) transforming said mutated yeast cell with an expression vector comprising a heterologous nucleotide sequence encoding a candidate polypeptide having potential enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA; c) testing said recombinant mutated yeast cell for its ability to grow on minimal medium containing glucose as sole carbon source, and d) identifying said candidate polypeptide as a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol ofType: GrantFiled: October 3, 2013Date of Patent: February 23, 2021Assignee: DSM IP ASSETS B.V.Inventors: Ulrike Maria Mueller, Liang Wu, Lourina Madeleine Raamsdonk, Aaron Adriaan Winkler
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Patent number: 9303253Abstract: The invention relates to an eukaryotic cell expressing nucleotide sequences encoding the ara A, ara B and ara D enzymes whereby the expression of these nucleotide sequences confers on the cell the ability to use L-arabinose and/or convert L-arabinose into L-ribulose, and/or xylulose 5-phosphate and/or into a desired fermentation product such as ethanol. Optionally, the eukaryotic cell is also able to convert xylose into ethanol.Type: GrantFiled: January 6, 2012Date of Patent: April 5, 2016Assignee: DSM IP ASSETS B.V.Inventors: Antonius Jeroen Adriaan Van Maris, Jacobus Thomas Pronk, Hendrik Wouter Wisselink, Johannes Pieter Van Dijken, Aaron Adriaan Winkler, Johannes Hendrik Winde
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Publication number: 20150104543Abstract: Improved systems for the biological production of organic acids are described.Type: ApplicationFiled: September 25, 2014Publication date: April 16, 2015Inventors: Aaron Adriaan WINKLER, Abraham Frederik DE HULSTER, Johannes Pieter VAN DIJKEN, Jacobus Thomas PRONK, Joshua TRUEHEART, Kevin T. MADDEN, Carlos Gancedo RODRIGUEZ, Carmen-Lisset Flores MAURIZ, Antonius Jeroen Adriaan VAN MARIS, Jacob C. HARRISON
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Publication number: 20150010943Abstract: The present invention relates to genetic modifications in eukaryotic host cells that have been transformed to express a xylose isomerase that confers on the host cell the ability to isomerize xylose to xylulose. These genetic modifications are aimed at improving the efficiency of xylose metabolism and include, e.g., reduction of nonspecific aldose reductase activity, increased xylulose kinase activity and increased flux of the pentose phosphate pathway. The modified host cells of the invention are suitable for the production of a wide variety of fermentation products, including ethanol, in fermentation processes in which a source of xylose or a source of xylose and glucose are used as carbon source.Type: ApplicationFiled: June 24, 2014Publication date: January 8, 2015Inventors: Aaron Adriaan WINKLER, Sipko Maarten KUYPER, Wilhelmus Theodorus Antonius Maria DE LAAT, Johannes Pieter VAN DIJKEN, Jacobus Thomas PRONK
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Patent number: 8790903Abstract: The present invention relates to genetic modifications in eukaryotic host cells that have been transformed to express a xylose isomerase that confers on the host cell the ability to isomerize xylose to xylulose. These genetic modifications are aimed at improving the efficiency of xylose metabolism and include. e.g., reduction of nonspecific aldose reductase activity, increased xylulose kinase activity and increased flux of the pentose phosphate pathway. The modified host cells of the invention are suitable for the production of a wide variety of fermentation products, including ethanol, in fermentation processes in which a source of xylose or a source of xylose and glucose are used as carbon source.Type: GrantFiled: September 2, 2011Date of Patent: July 29, 2014Assignee: DSM IP Assets B.V.Inventors: Aaron Adriaan Winkler, Sipko Maarten Kuyper, Wilhelmus Theordorus Antonius Maria De Laat, Johannes Pieter Van Dijken, Jacobus Thomas Pronk
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Publication number: 20140030730Abstract: The present invention relates to a method of identifying a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol of) a yeast cell comprising: a) providing a mutated yeast cell comprising a deletion of at least one gene of the (PDH) by-pass, selected from the genes encoding the enzymes pyruvate decarboxylase (PDC), acetaldehyde dehydrogenase (ALD), and acetyl-CoA synthetase (ACS); b) transforming said mutated yeast cell with an expression vector comprising a heterologous nucleotide sequence encoding a candidate polypeptide having potential enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA; c) testing said recombinant mutated yeast cell for its ability to grow on minimal medium containing glucose as sole carbon source, and d) identifying said candidate polypeptide as a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol ofType: ApplicationFiled: October 3, 2013Publication date: January 30, 2014Applicant: DSM IP ASSETS B.V.Inventors: Ulrike Maria MUELLER, Liang WU, Lourina Madeleine RAAMSDONK, Aaron Adriaan WINKLER
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Publication number: 20120225451Abstract: The present invention relates to genetic modifications in eukaryotic host cells that have been transformed to express a xylose isomerase that confers on the host cell the ability to isomerize xylose to xylulose. These genetic modifications are aimed at improving the efficiency of xylose metabolism and include. e.g., reduction of nonspecific aldose reductase activity, increased xylulose kinase activity and increased flux of the pentose phosphate pathway. The modified host cells of the invention are suitable for the production of a wide variety of fermentation products, including ethanol, in fermentation processes in which a source of xylose or a source of xylose and glucose are used as carbon source.Type: ApplicationFiled: September 2, 2011Publication date: September 6, 2012Applicant: Technische Universiteit DelftInventors: Aaron Adriaan WINKLER, Sipko Maarten Kuyper, Wilhelmus Theodorus Antonius Maria De Laat, Johannes Pieter Van Dijken, Jacobus Thomas Pronk
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Publication number: 20120208231Abstract: The invention relates to an eukaryotic cell expressing nucleotide sequences encoding the ara A, ara B and ara D enzymes whereby the expression of these nucleotide sequences confers on the cell the ability to use L-arabinose and/or convert L-arabinose into L-ribulose, and/or xylulose 5-phosphate and/or into a desired fermentation product such as ethanol. Optionally, the eukaryotic cell is also able to convert xylose into ethanol.Type: ApplicationFiled: January 6, 2012Publication date: August 16, 2012Applicant: DSM IP ASSETS B.V.Inventors: Antonius Jeroen Adriaan VAN MARIS, Jacobus Thomas PRONK, Hendrik Wouter WISSELINK, Johannes Pieter VAN DIJKEN, Aaron Adriaan WINKLER, Johannes Hendrik DE WINDE
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Patent number: 8034591Abstract: The present invention relates to further genetic modifications in eukaryotic host cells that have been transformed to express a xylose isomerase that confers the host cell the ability of isomerizing xylose to xylulose. The further genetic modifications are aimed at improving the efficiency of xylose metabolism and include e.g. reduction of unspecific aldose reductase activity, increased xylulose kinase activity and increased flux of the pentose phosphate pathway. The modified host cells of the invention are suitable for the production of a wide variety of fermentation products, including ethanol, in fermentation processes in which a source of xylose or a source of xylose and glucose are used as carbon source.Type: GrantFiled: July 15, 2005Date of Patent: October 11, 2011Assignee: Techische Universiteit DelftInventors: Aaron Adriaan Winkler, Sipko Maarten Kuyper, Wilhelmus Theodorus Antonius Maria De Laat, Johannes Pieter Van Dijken, Jacobus Thomas Pronk
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Publication number: 20110045559Abstract: The present disclosure relates to modified yeast, wherein the yeast has reduced pyruvate decarboxylase polypeptide (PDC) activity and methods of using such yeast to produce malic and/or succinic acid.Type: ApplicationFiled: May 19, 2008Publication date: February 24, 2011Inventors: Aaron Adriaan Winkler, Abraham Frederik De Hulster, Johannes Pieter Van Dijken, Jacobus Thomas Pronk, Joshua Trueheart, Kevin T. Madden, Jacob C. Harrison, Carlos Gancedo Rodriguez, Carmen-Lisset Flores Mauriz
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Publication number: 20110039327Abstract: Improved systems for the biological production of organic acids are described.Type: ApplicationFiled: May 19, 2008Publication date: February 17, 2011Inventors: Aaron Adriaan Winkler, Abraham Frederik De Hulster, Johannes Pieter Van Dijken, Jacobus Thomas Pronk, Joshua Trueheart, Kevin T. Madden, Carlos Gancedo Rodriguez, Carmen-Lisset Flores Mauriz, Antonius Jeroen Adriaan Van Maris, Jacob C. Harrison
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Publication number: 20100248233Abstract: The present invention relates to a method of identifying a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol of) a yeast cell comprising: a) providing a mutated yeast cell comprising a deletion of at least one gene of the (PDH) by-pass, selected from the genes encoding the enzymes pyruvate decarboxylase (PDC), acetaldehyde dehydrogenase (ALD), and acetyl-CoA synthetase (ACS); b) transforming said mutated yeast cell with an expression vector comprising a heterologous nucleotide sequence encoding a candidate polypeptide having potential enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA; c) testing said recombinant mutated yeast cell for its ability to grow on minimal medium containing glucose as sole carbon source, and d) identifying said candidate polypeptide as a heterologous polypeptide having enzymatic activity for converting pyruvate, acetaldehyde or acetate into acetyl-CoA in (the cytosol ofType: ApplicationFiled: July 11, 2008Publication date: September 30, 2010Applicant: DSM IP ASSETS B.V.Inventors: Ulrike Maria Müller, Liang Wu, Lourina Madeleine Raamsdonk, Aaron Adriaan Winkler
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Publication number: 20100086965Abstract: The invention relates to an eukaryotic cell expressing nucleotide sequences encoding the ara A, ara B and ara D enzymes whereby the expression of these nucleotide sequences confers on the cell the ability to use L-arabinose and/or convert L-arabinose into L-ribulose, and/or xylulose 5-phosphate and/or into a desired fermentation product such as ethanol. Optionally, the eukaryotic cell is also able to convert xylose into ethanol.Type: ApplicationFiled: October 1, 2007Publication date: April 8, 2010Inventors: Antonius Jeroen Adriaan Van Maris, Jacobus Thomas Pronk, Hendrik Wouter Wisselink, Johannes Pieter Van Dijken, Aaron Adriaan Winkler, Johannes Hendrik De Winde
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Publication number: 20080261287Abstract: The present invention relates to further genetic modifications in eukaryotic host cells that have been transformed to express a xylose isomerase that confers the host cell the ability of isomerising xylose to xylulose. The further genetic modifications are aimed at improving the efficiency of xylose metabolism and include e.g. reduction of unspecific aldose reductase activity, increased xylulose kinase activity and increased flux of the pentose phosphate pathway. The modified host cells of the invention are suitable for the production of a wide variety of fermentation products, including ethanol, in fermentation processes in which a source of xylose or a source of xylose and glucose are used as carbon source.Type: ApplicationFiled: July 15, 2005Publication date: October 23, 2008Inventors: Aaron Adriaan Winkler, Sipko Maarten Kuyper, Wilhelmus Theodorus Antonius Maria De Laat, Johannes Pieter Van Dijken, Jacobus Thomas Pronk
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Publication number: 20080090273Abstract: We disclose a recombinant yeast, wherein the yeast is pyruvate decarboxylase enzyme (PDC) activity negative (PDC-negative) and is functionally transformed with a coding region encoding a pyruvate carboxylase enzyme (PYC) wherein the PYC is active in the cytosol, a coding region encoding a malate dehydrogenase enzyme (MDH) wherein the MDH is active in the cytosol and is not inactivated in the presence of glucose, and a coding region encoding a malic acid transporter protein (MAE). We also disclose a method of producing malic acid by culturing such a yeast in a medium comprising a carbon source and a carbon dioxide source and isolating malic acid from the medium.Type: ApplicationFiled: October 31, 2006Publication date: April 17, 2008Inventors: Aaron Adriaan Winkler, Abraham Frederik de Hulster, Johannes Pieter van Dijken, Jacobus Thomas Pronk