Patents by Inventor Ka-Yiu San

Ka-Yiu San 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: 9309543
    Abstract: There is provided a recombinant bacterium comprising at least one overexpressed acyl-ACP thioesterase gene, and wherein at least one gene from the tricarboxylic acid cycle or glycolysis or both is inactivated. There is also provided a method for producing fatty acids, said method comprising culturing bacteria comprising at least one overexpressed acyl-ACP thioesterase gene in a growth medium in a container having walls; allowing said bacteria to secrete fatty acids; and collecting said fatty acids. Acid supplementation is also shown to increase productivity.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: April 12, 2016
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, Mai Li, Xiujun Zhang
  • Publication number: 20160040171
    Abstract: The disclosure relates to biological methods of making a hydrocarbon feedstock wherein one-carbon substrates are converted into useful chemicals and fuels. Particularly, genetically engineered bacteria are used to make C4-C10 fatty acids or derivatives from one-carbon substrates such as methanol and carbon dioxide.
    Type: Application
    Filed: October 22, 2015
    Publication date: February 11, 2016
    Inventors: Ka-Yiu SAN, George BENNETT, Mukund KARANJIKAR
  • Publication number: 20150259712
    Abstract: Methods of improving fatty acid production in bacteria, yeast, algae, and various other microbes are presented, by either supplementing the medium with millimolar amounts of magnesium, by overexpressing a magnesium transporter, or both.
    Type: Application
    Filed: March 9, 2015
    Publication date: September 17, 2015
    Inventors: Ka-Yiu SAN, SongI HAN, Wei LI, Mai LI, Zhilin LI
  • Publication number: 20150225753
    Abstract: Systems, methods and microbes that allow the biological production of hydroxy fatty acids and dicarboxylic fatty acids are provided. Specifically, hydroxy fatty acids and dicarboxylic fatty acids are produced by microbes that have been engineered to overexpress acyl ACP thioesterase plus an alkane degration pathway, such as AlkBGT or AlkJH These can be in separate microbes or the same microbe, and separate microbes can be co-cultured or sequentially cultured. Continuously fed systems transferring secreted fats from one microbial culture to another can also be used.
    Type: Application
    Filed: January 28, 2015
    Publication date: August 13, 2015
    Inventors: Ka-Yiu SAN, Xixian XIE, Leepika TULI, Hui WU
  • Patent number: 8962272
    Abstract: Bacteria optimized to produce succinate and other feedstocks by growing on low cost carbon sources, such as sucrose.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: February 24, 2015
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, George N. Bennett, Jian Wang
  • Patent number: 8906667
    Abstract: A method of increasing cellular NADPH levels by expressing one or more genes that encode an enzyme that causes the production of NADPH. The system is combined with other enzymes that require NADPH, thus improving the overall yield of the desired product.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: December 9, 2014
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, George Bennett, Henry Lin, Irene Martinez, Jiangfeng Zhu
  • Publication number: 20140335578
    Abstract: Methods of using crude glycerol to make fatty acids are provided, as well as integrated methods of converting glycerol waste from biodiesel production into more biodiesel. Bacteria and other microbes engineered to produce free fatty acids from glycerol are also provided.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 13, 2014
    Applicant: William Marsh Rice University
    Inventors: Ka-Yiu SAN, Hui WU
  • Publication number: 20140273114
    Abstract: The present invention discloses a process for increasing the production of free fatty acids at high yield (close to maximum theoretical yield), with various fatty acid compositions and various percentage of fatty acids accumulated intracellularly. This invention will enable the efficient production of other products derived from free fatty acids and/or products that can be branched out from the fatty acid synthesis pathways.
    Type: Application
    Filed: October 16, 2012
    Publication date: September 18, 2014
    Inventors: Ka-Yiu San, Mai Li
  • Publication number: 20140227745
    Abstract: The disclosure relates to a metabolic transistor in bacteria where a competitive pathway is introduced to compete with a product pathway for available carbon so as to control the carbon flux in the bacteria.
    Type: Application
    Filed: February 7, 2014
    Publication date: August 14, 2014
    Applicant: William Marsh Rice University
    Inventors: Ka-Yiu SAN, George N. BENNETT, Hui WU
  • Patent number: 8795991
    Abstract: Improved bacteria for making succinate and other 4 carbon dicarboxylates from the Krebs cycle have modifications to reduce acetate, lactate, EtOH and formate, as well as turn on the glyoxylate shunt, produce more NADH and overexpress In one embodiment, the bacteria are ?adhE?ldhA?iclR?ack-pta plus PYC+ and NAD+-dependant FDH+.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: August 5, 2014
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, George Bennett, Grant Balzer, Jiangfeng Zhu, Chandresh Thakker, Ailen Sanchez
  • Publication number: 20140212935
    Abstract: The present invention relates to an engineered bacteria for producing short chain fatty acid with the overexpression of a long chain (>C12) acyl-ACP thioesterases (long-TE) and a short chain (?C12) acyl-ACP thioesterases (short-TE).
    Type: Application
    Filed: January 22, 2014
    Publication date: July 31, 2014
    Applicant: William Marsh Rice University
    Inventors: Ka-Yiu SAN, Songi HAN
  • Publication number: 20140193867
    Abstract: Engineered bacteria that produce a predominance of odd-chain free fatty acids.
    Type: Application
    Filed: December 12, 2013
    Publication date: July 10, 2014
    Inventors: Ka-Yiu SAN, Hui WU
  • Patent number: 8709753
    Abstract: This invention is metabolically engineer bacterial strains that provide increased intracellular NADPH availability for the purpose of increasing the yield and productivity of NADPH-dependent compounds. In the invention, native NAD-dependent GAPDH is replaced with NADP-dependent GAPDH plus overexpressed NADK. Uses for the bacteria are also provided.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: April 29, 2014
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, George N. Bennett, Yipeng Wang
  • Publication number: 20140093921
    Abstract: There is provided a recombinant bacterium comprising at least one overexpressed acyl-ACP thioesterase gene, and wherein at least one gene from the tricarboxylic acid cycle or glycolysis or both is inactivated. There is also provided a method for producing fatty acids, said method comprising culturing bacteria comprising at least one overexpressed acyl-ACP thioesterase gene in a growth medium in a container having walls; allowing said bacteria to secrete fatty acids; and collecting said fatty acids. Acid supplementation is also shown to increase productivity.
    Type: Application
    Filed: March 18, 2011
    Publication date: April 3, 2014
    Applicant: WILLIAM MARSH RICE UNIVERSITY
    Inventors: Ka-Yiu San, Mai Li, Xiujun Zhang
  • Publication number: 20130203137
    Abstract: Improved bacteria for making succinate and other 4 carbon dicarboxylates from the Krebs cycle have modifications to reduce acetate, lactate, EtOH and formate, as well as turn on the glyoxylate shunt, produce more NADH and overexpress In one embodiment, the bacteria are ?adhE?ldhA?iclR?ack-pta plus PYC+ and NAD+-dependant FDH+.
    Type: Application
    Filed: May 3, 2011
    Publication date: August 8, 2013
    Applicant: WILLIAM MARSH RICE UNIVERSITY
    Inventors: Ka-Yiu San, George N. Bennett, Grant J. Balzer, Jiangfeng Zhu, Chandresh Thakker, Ailen M. Sanchez
  • Patent number: 8486686
    Abstract: A new culture method for producing high levels of a metabolite, such as succinic acid uses oxygen rich culture without pH adjustment to increase the biomass, acclimation in under oxygen lean conditions having <5% partial pressure of oxygen, and the production of high levels of succinate under oxygen deprived conditions. The method can be performed in a single reactor, and is amenable to efficient scale up.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 16, 2013
    Assignee: William Marsh Rice University
    Inventors: Laurent Segueilha, Ka-Yiu San, George Bennett, Irene Martinez
  • Publication number: 20130052705
    Abstract: Bacteria optimized to produce succinate and other feedstocks by growing on low cost carbon sources, such as sucrose.
    Type: Application
    Filed: June 20, 2011
    Publication date: February 28, 2013
    Applicant: WILLIAM MARSH RICE UNIVERSITY
    Inventors: Ka-Yiu San, George N. Bennett, Jian Wang
  • Patent number: 8236525
    Abstract: A method of producing biological products using bacteria with an inactivated ptsHI and wild type err and no added glucose transport activity and which consumes nearly all glucose in the media is described. The ?ptsHI bacteria produce large quantities of recombinant protein without producing significant amounts of acetate. The bacteria grow well on standard LB broth without additional supplementation.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: August 7, 2012
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, George N. Bennett, Thomas Bryce Causey, Matthew Sing Wong, Steven Wu
  • Patent number: 8207313
    Abstract: New and useful compounds C. roseus cultured hairy roots are provided, by Isolating flavone glycosides together with a pharmaceutically acceptable carrier. This is accomplished by immersing powdered the hairy roots in methanol to produce an extract, concentrating the extract, resuspending the extract in water, extracting the compound with organic solvent, and isolating the compound from the organic solvent.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: June 26, 2012
    Assignee: William Marsh Rice University
    Inventors: Ka-Yiu San, Ill-Min Chung, Ateeque Ahmad
  • Patent number: 8143035
    Abstract: The invention relates to the synthesis of polyketides in Actinomycetes by overexpression of pantothenate kinase and supplementation with pantothenic acid. This results in increasing in vivo CoA production and thereby drives increased production of secondary metabolites, such as polyketides.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: March 27, 2012
    Assignee: Rice University
    Inventors: Hei Chan Lee, Jae Kyung Sohng, Ka-Yiu San