Patents by Inventor Xinkai Xie

Xinkai Xie 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).

  • Publication number: 20230416696
    Abstract: The present invention refers to a modified D-amino acid oxidase (DAAO). In particular, the modified DAAO of the present invention has the activity of catalyzing the oxidation of D-glufosinate into PPO. Further, the modified DAAO of the present invention has increased activity of catalyzing the oxidation of D-glufosinate into PPO and/or increased stability as compared to SEQ ID NO: 4. The present invention also refers to the polynucleotide encoding the modified DAAO of the present invention, the vector and host cell expressing the modified DAAO of the present invention, and the method of producing L-glufosinate with the modified DAAO and host cell of the present invention.
    Type: Application
    Filed: April 20, 2023
    Publication date: December 28, 2023
    Inventors: Xinkai Xie, Wei Xu, Junying Fan
  • Publication number: 20230332113
    Abstract: The present invention refers to a modified glutamate dehydrogenase (GluDH). In particular the modified GluDH of the present invention has an increased activity for catalyzing the reaction of 4-(hydroxymethylphosphinyl)-2-oxobutanoic acid (PPO) and an amino donor to generate L-glufosinate and/or an improved dynamic property. The present invention also refers to the polynucleotide encoding the modified GluDH of the present invention, the vector and host cell for expressing the modified GluDH of the present invention and the method of producing L-glufosinate with the modified GluDH and host cell of the present invention.
    Type: Application
    Filed: July 8, 2021
    Publication date: October 19, 2023
    Inventors: Xinkai Xie, Wei Xu, Junying Fan
  • Patent number: 11667896
    Abstract: The present invention refers to a modified D-amino acid oxidase (DAAO). In particular, the modified DAAO of the present invention has the activity of catalyzing the oxidation of D-glufosinate into PPO. Further, the modified DAAO of the present invention has increased activity of catalyzing the oxidation of D-glufosinate into PPO and/or increased stability as compared to SEQ ID NO: 4. The present invention also refers to the polynucleotide encoding the modified DAAO of the present invention, the vector and host cell expressing the modified DAAO of the present invention, and the method of producing L-glufosinate with the modified DAAO and host cell of the present invention.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: June 6, 2023
    Assignee: Hunan Lier Biotech Co., LTD
    Inventors: Xinkai Xie, Wei Xu, Junying Fan
  • Publication number: 20220333086
    Abstract: The present invention refers to a modified D-amino acid oxidase (DAAO). In particular, the modified DAAO of the present invention has the activity of catalyzing the oxidation of D-glufosinate into PPO. Further, the modified DAAO of the present invention has increased activity of catalyzing the oxidation of D-glufosinate into PPO and/or increased stability as compared to SEQ ID NO: 4. The present invention also refers to the polynucleotide encoding the modified DAAO of the present invention, the vector and host cell expressing the modified DAAO of the present invention, and the method of producing L-glufosinate with the modified DAAO and host cell of the present invention.
    Type: Application
    Filed: June 9, 2022
    Publication date: October 20, 2022
    Inventors: Xinkai Xie, Wei Xu, Junying Fan
  • Publication number: 20220106575
    Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize a variety of chiral compounds.
    Type: Application
    Filed: December 16, 2021
    Publication date: April 7, 2022
    Inventors: Oscar Alvizo, Nicholas J. Agard, Xinkai Xie, David Entwistle, Birgit Kosjek
  • Patent number: 11236308
    Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize a variety of chiral compounds.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: February 1, 2022
    Assignee: Codexis, Inc.
    Inventors: Oscar Alvizo, Nicholas J. Agard, Xinkai Xie, David Entwistle, Birgit Kosjek
  • Publication number: 20200347365
    Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize a variety of chiral compounds.
    Type: Application
    Filed: May 14, 2020
    Publication date: November 5, 2020
    Inventors: Oscar Alvizo, Nicholas J. Agard, Xinkai Xie, David Entwistle, Birgit Kosjek
  • Patent number: 10793884
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: October 6, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yi Tang, Xinkai Xie
  • Patent number: 10696953
    Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize a variety of chiral compounds.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: June 30, 2020
    Assignee: Codexis, Inc.
    Inventors: Oscar Alvizo, Nicholas J. Agard, Xinkai Xie, David Entwistle, Birgit Kosjek
  • Patent number: 10689628
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilitates lovastatin being converted to simvastatin and related compounds with minimal modifications.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: June 23, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Publication number: 20190169580
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilities lovastatin being converted to simvastatin and related compounds with minimal modifications.
    Type: Application
    Filed: February 15, 2019
    Publication date: June 6, 2019
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Patent number: 10246689
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilities lovastatin being converted to simvastatin and related compounds with minimal modifications.
    Type: Grant
    Filed: October 18, 2016
    Date of Patent: April 2, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Publication number: 20180355391
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin.
    Type: Application
    Filed: May 4, 2018
    Publication date: December 13, 2018
    Inventors: Yi Tang, Xinkai Xie
  • Publication number: 20180320211
    Abstract: Provided in the present invention is a method for preparing rebaudioside M by using an enzymatic process, which catalyzes the formation of rebaudioside M using a recombinant Saccharomyces cerevisiae containing a UDP-glucosyltransferase or a UDP-glucosyltransferase prepared therefrom. The recombinant Saccharomyces cerevisiae is obtained by transforming an expression vector containing the UDP-glucosyltransferase gene under the control of a strong promoter.
    Type: Application
    Filed: August 21, 2015
    Publication date: November 8, 2018
    Inventors: Haomian DU, Xihuan WEI, Xinkai XIE, Junhua TAO
  • Patent number: 9970037
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: May 15, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yi Tang, Xinkai Xie
  • Publication number: 20180002676
    Abstract: The present disclosure provides engineered ketoreductase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase enzyme. Also provided are polynucleotides encoding the engineered ketoreductase enzymes, host cells capable of expressing the engineered ketoreductase enzymes, and methods of using the engineered ketoreductase enzymes to synthesize a variety of chiral compounds.
    Type: Application
    Filed: February 5, 2016
    Publication date: January 4, 2018
    Inventors: Oscar Alvizo, Nicholas J. Agard, Xinkai Xie, David Entwistle, Birgit Kosjek
  • Publication number: 20170029790
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilities currently producing lovastatin can be converted to producing simvastatin and related compounds with minimal modifications.
    Type: Application
    Filed: October 18, 2016
    Publication date: February 2, 2017
    Applicant: The Regents of the University of California
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Patent number: 9499803
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilities currently producing lovastatin can be converted to producing simvastatin and related compounds with minimal modifications.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: November 22, 2016
    Assignee: The Regents of the University of California
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Publication number: 20150218531
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin. In particular, the disclosure teaches that variants of the LovD acyltransferase polypeptide can be engineered to exhibit properties that facilitate their use in the production of simvastatin and/or huvastatin. The materials and processes disclosed herein are designed so that fermentation facilities currently producing lovastatin can be converted to producing simvastatin and related compounds with minimal modifications.
    Type: Application
    Filed: February 6, 2015
    Publication date: August 6, 2015
    Inventors: Yi Tang, Xue Gao, Xinkai Xie
  • Publication number: 20150203884
    Abstract: The invention disclosed herein relates to methods and materials for producing simvastatin and related compounds such as huvastatin.
    Type: Application
    Filed: January 16, 2015
    Publication date: July 23, 2015
    Inventors: Yi Tang, Xinkai Xie