Patents by Inventor Da Duan

Da Duan 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).

  • Patent number: 12540314
    Abstract: The present invention provides engineered peroxidase enzymes, polypeptides having peroxidase activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing peroxidase enzymes are also provided. The present invention further provides compositions comprising the peroxidase enzymes and methods of using the engineered peroxidase enzymes. The present invention finds particular use in the production of pharmaceutical and other compounds.
    Type: Grant
    Filed: May 6, 2024
    Date of Patent: February 3, 2026
    Assignee: Codexis, Inc.
    Inventors: Da Duan, Auric Anthony Sowell-Kantz, Aksiniya Lyubenova Petkova, Jovana Nazor, Nandhitha Subramanian, Oscar Alvizo
  • Publication number: 20260009012
    Abstract: The present invention provides engineered phosphopentomutase (PPM) enzymes, polypeptides having PPM activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing PPM enzymes are also provided. The present invention further provides compositions comprising the PPM enzymes and methods of using the engineered PPM enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Application
    Filed: September 15, 2025
    Publication date: January 8, 2026
    Applicant: Codexis, Inc.
    Inventors: Scott J. Novick, Xiang Yi, Nikki Dellas, Oscar Alvizo, Jovana Nazor, Da Duan, Vesna Mitchell, Jonathan Vroom, Santhosh Sivaramakrishnan, Nandhitha Subramanian, Jeffrey C. Moore, Mark Huffman, Agustina Rodriguez-Granillo, Deeptak Verma, Grant S. Murphy, Nicholas Marshall, Jay Russell, Keith A. Canada
  • Patent number: 12503688
    Abstract: The present invention provides engineered transaminase polypeptides and compositions thereof, as well as polynucleotides encoding the engineered transaminase polypeptides. Methods for producing transaminase enzymes are also provided. In some embodiments, the engineered transaminase polypeptides are optimized to provide improved enzyme properties under minimal aqueous conditions in wet organic solvents.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: December 23, 2025
    Assignee: Codexis, Inc.
    Inventors: Jovana Nazor, Christopher Michael Micklitsch, Da Duan, Auric Anthony Sowell-Kantz, Steven Miller, Birgit Kosjek, Iman Farasat, Nicholas M. Marshall
  • Patent number: 12480111
    Abstract: The present invention provides engineered penicillin G acylase (PGA) enzymes, polynucleotides encoding the enzymes, compositions comprising the enzymes, and methods of using the engineered PGA enzymes.
    Type: Grant
    Filed: March 23, 2023
    Date of Patent: November 25, 2025
    Assignee: Codexis, Inc.
    Inventors: Rama Voladri, Christopher Michael Micklitsch, Oscar Alvizo, Jovana Nazor, Da Duan, Judy Victoria Antonio Viduya, Stephan Jenne, Chihui An, Keith Allen Canada, Paul N. Devine, Iman Farasat, Anna Fryszkowska, Katrina W. Lexa, Robert Kevin Orr
  • Patent number: 12473557
    Abstract: The present invention provides engineered guanylate kinase (GK) enzymes, polypeptides having GK activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing GK enzymes are also provided. The present invention further provides compositions comprising the GK enzymes and methods of using the engineered GK enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Grant
    Filed: April 1, 2022
    Date of Patent: November 18, 2025
    Assignee: Codexis, Inc.
    Inventors: Da Duan, Auric Anthony Sowell-Kantz, Aksiniya Lyubenova Petkova, Oscar Alvizo
  • Patent number: 12460195
    Abstract: The present invention provides engineered deoxyribose-phosphate aldolase polypeptides useful under industrial process conditions for the production of pharmaceutical and fine chemical compounds.
    Type: Grant
    Filed: November 7, 2023
    Date of Patent: November 4, 2025
    Assignee: Codexis, Inc.
    Inventors: Da Duan, Oscar Alvizo, Jovana Nazor, Harvinder Chagger Maniar, James Nicholas Riggins, Jonathan Vroom, Santhosh Sivaramakrishnan, Hao Yang, Anna Fryszkowska, Mark A. Huffman, Joshua N. Kolev, Iman Farasat, Agustina Rodriguez-Granillo, Deeptak Verma
  • Patent number: 12421509
    Abstract: The present invention provides engineered phosphopentomutase (PPM) enzymes, polypeptides having PPM activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing PPM enzymes are also provided. The present invention further provides compositions comprising the PPM enzymes and methods of using the engineered PPM enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: September 23, 2025
    Assignee: Codexis, Inc.
    Inventors: Scott J. Novick, Xiang Yi, Nikki Dellas, Oscar Alvizo, Jovana Nazor, Da Duan, Vesna Mitchell, Jonathan Vroom, Santhosh Sivaramakrishnan, Nandhitha Subramanian, Jeffrey C. Moore, Mark Huffman, Agustina Rodriguez-Granillo, Deeptak Verma, Grant S. Murphy, Nicholas Marshall, Jay Russell, Keith A. Canada
  • Publication number: 20250207171
    Abstract: The present invention provides engineered ketoreductase and phosphite dehydrogenase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase and phosphite dehydrogenase enzymes, as well as polynucleotides encoding the engineered ketoreductase and phosphite dehydrogenase enzymes, host cells capable of expressing the engineered ketoreductase and phosphite dehydrogenase enzymes, and methods of using the engineered ketoreductase and phosphite dehydrogenase enzymes to synthesize a chiral catalyst used in the synthesis of antiviral compounds, such as nucleoside inhibitors. The present invention further provides methods of using the engineered enzymes to deracemize a chiral alcohol in a one-pot, multi-enzyme system.
    Type: Application
    Filed: March 14, 2025
    Publication date: June 26, 2025
    Inventors: Jeffrey C. Moore, Jack Liang, Jonathan Penfield, Jovana Nazor, Nikki Dellas, Vesna Mitchell, Da Duan, Iman Farasat, Agustina Rodriguez-Granillo, Grant Murphy, Nicholas Marshall
  • Patent number: 12252723
    Abstract: The present invention provides engineered ketoreductase and phosphite dehydrogenase enzymes having improved properties as compared to a naturally occurring wild-type ketoreductase and phosphite dehydrogenase enzymes, as well as polynucleotides encoding the engineered ketoreductase and phosphite dehydrogenase enzymes, host cells capable of expressing the engineered ketoreductase and phosphite dehydrogenase enzymes, and methods of using the engineered ketoreductase and phosphite dehydrogenase enzymes to synthesize a chiral catalyst used in the synthesis of antiviral compounds, such as nucleoside inhibitors. The present invention further provides methods of using the engineered enzymes to deracemize a chiral alcohol in a one-pot, multi-enzyme system.
    Type: Grant
    Filed: July 14, 2023
    Date of Patent: March 18, 2025
    Assignee: Codexis, Inc.
    Inventors: Jeffrey C. Moore, Jack Liang, Jonathan Penfield, Jovana Nazor, Nikki Dellas, Vesna Mitchell, Da Duan, Iman Farasat, Agustina Rodriguez-Granillo, Grant Murphy, Nicholas Marshall
  • Publication number: 20250027094
    Abstract: The present invention provides engineered purine nucleoside phosphorylase (PNP) enzymes, polypeptides having PNP activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing PNP enzymes are also provided. The present invention further provides compositions comprising the PNP enzymes and methods of using the engineered PNP enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Application
    Filed: October 4, 2024
    Publication date: January 23, 2025
    Inventors: Scott J. Novick, Nikki Dellas, Vesna Mitchell, Da Duan, Jovana Nazor, Oscar Alvizo, Auric Anthony Sowell-Kantz, Jeffrey C. Moore, Mark A. Huffman, Agustina Rodriguez-Granillo, Deeptak Verma, Nicholas M. Marshall, Jay H. Russell, Keith A. Canada
  • Publication number: 20240409916
    Abstract: The present invention provides engineered penicillin G acylase (PGA) enzymes, polynucleotides encoding the enzymes, compositions comprising the enzymes, and methods of using the engineered PGA enzymes.
    Type: Application
    Filed: August 23, 2024
    Publication date: December 12, 2024
    Inventors: Oscar Alvizo, David Elgart, Robert Kevin Orr, James Nicholas Riggins, Anna Fryszkowska, Katrina W. Lexa, Xiang Yi, Da Duan, Courtney Dianne Moffett, Nikki Dellas, Vesna Mitchell
  • Publication number: 20240409912
    Abstract: The present disclosure provides engineered protease polypeptides, recombinant polynucleotides encoding the engineered protease polypeptides, and uses of the engineered protease polypeptides in therapeutic applications.
    Type: Application
    Filed: May 30, 2024
    Publication date: December 12, 2024
    Inventors: Chinping Chng, Ruth L. Cong, Da Duan, Brian Ferrer, Ravi David Garcia, Nikki D. Kruse, Hirdesh Kumar, Stephen Joshua Macaso Millet, Trica Windgassen, Liang Zhu
  • Publication number: 20240384251
    Abstract: The present invention provides engineered amylase polypeptides and compositions thereof. The engineered amylase polypeptides have been optimized to provide improved thermostability, protease stability, and stability under a range of pH conditions, including acidic (pH<7) conditions. The invention also relates to the use of the compositions comprising the engineered amylase polypeptides for therapeutic and/or nutritional purposes. The present invention also provides polynucleotides encoding the engineered amylase polypeptides, as well as methods for making the engineered polynucleotides and amylase polypeptides.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 21, 2024
    Inventors: Chinping Chng, Nikki Dellas, Da Duan, Ravi David Garcia, Harvinder Chagger Maniar
  • Patent number: 12110493
    Abstract: The present invention provides engineered purine nucleoside phosphorylase (PNP) enzymes, polypeptides having PNP activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing PNP enzymes are also provided. The present invention further provides compositions comprising the PNP enzymes and methods of using the engineered PNP enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: October 8, 2024
    Assignee: Codexis, Inc.
    Inventors: Scott J. Novick, Nikki Dellas, Vesna Mitchell, Da Duan, Jovana Nazor, Oscar Alvizo, Auric Anthony Sowell-Kantz, Jeffrey C. Moore, Mark A. Huffman, Agustina Rodriguez-Granillo, Deeptak Verma, Nicholas M. Marshall, Jay H. Russell, Keith A. Canada
  • Publication number: 20240301367
    Abstract: The present invention provides engineered peroxidase enzymes, polypeptides having peroxidase activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing peroxidase enzymes are also provided. The present invention further provides compositions comprising the peroxidase enzymes and methods of using the engineered peroxidase enzymes. The present invention finds particular use in the production of pharmaceutical and other compounds.
    Type: Application
    Filed: May 6, 2024
    Publication date: September 12, 2024
    Applicant: Codexis, Inc.
    Inventors: Da Duan, Auric Anthony Sowell-Kantz, Aksiniya Lyubenova Petkova, Jovana Nazor, Nandhitha Subramanian, Oscar Alvizo
  • Patent number: 12084697
    Abstract: The present invention provides engineered penicillin G acylase (PGA) enzymes, polynucleotides encoding the enzymes, compositions comprising the enzymes, and methods of using the engineered PGA enzymes.
    Type: Grant
    Filed: January 23, 2023
    Date of Patent: September 10, 2024
    Assignee: Codexis, Inc.
    Inventors: Oscar Alvizo, David Elgart, Robert Kevin Orr, James Nicholas Riggins, Anna Fryszkowska, Katrina W. Lexa, Xiang Yi, Da Duan, Courtney Dianne Moffett, Nikki Dellas, Vesna Mitchell
  • Patent number: 12071642
    Abstract: The present invention provides engineered amylase polypeptides and compositions thereof. The engineered amylase polypeptides have been optimized to provide improved thermostability, protease stability, and stability under a range of pH conditions, including acidic (pH<7) conditions. The invention also relates to the use of the compositions comprising the engineered amylase polypeptides for therapeutic and/or nutritional purposes. The present invention also provides polynucleotides encoding the engineered amylase polypeptides, as well as methods for making the engineered polynucleotides and amylase polypeptides.
    Type: Grant
    Filed: September 6, 2023
    Date of Patent: August 27, 2024
    Assignees: Codexis, Inc., Société des Produits Nestlé S.A.
    Inventors: Chinping Chng, Nikki Dellas, Da Duan, Ravi David Garcia, Harvinder Chagger Maniar
  • Patent number: 12012620
    Abstract: The present invention provides engineered peroxidase enzymes, polypeptides having peroxidase activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing peroxidase enzymes are also provided. The present invention further provides compositions comprising the peroxidase enzymes and methods of using the engineered peroxidase enzymes. The present invention finds particular use in the production of pharmaceutical and other compounds.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: June 18, 2024
    Assignee: Codexis, Inc.
    Inventors: Da Duan, Auric Anthony Sowell-Kantz, Aksiniya Lyubenova Petkova, Jovana Nazor, Nandhitha Subramanian, Oscar Alvizo
  • Publication number: 20240158766
    Abstract: The present invention provides engineered adenylate kinase (AdK) enzymes, polypeptides having AdK activity, and polynucleotides encoding these enzymes, as well as vectors and host cells comprising these polynucleotides and polypeptides. Methods for producing AdK enzymes are also provided. The present invention further provides compositions comprising the AdK enzymes and methods of using the engineered AdK enzymes. The present invention finds particular use in the production of pharmaceutical compounds.
    Type: Application
    Filed: January 16, 2024
    Publication date: May 16, 2024
    Inventors: Da Duan, Auric Anthony Sowell-Kantz, Aksiniya Lyubenova Petkova, Oscar Alvizo
  • Publication number: 20240076647
    Abstract: The present invention provides engineered deoxyribose-phosphate aldolase polypeptides useful under industrial process conditions for the production of pharmaceutical and fine chemical compounds.
    Type: Application
    Filed: November 7, 2023
    Publication date: March 7, 2024
    Inventors: Da Duan, Oscar Alvizo, Jovana Nazor, Harvinder Chagger Maniar, James Nicholas Riggins, Jonathan Vroom, Santhosh Sivaramakrishnan, Hao Yang, Anna Fryszkowska, Mark A. Huffman, Joshua N. Kolev, Iman Farasat, Agustina Rodriguez-Granillo, Deeptak Verma