Patents by Inventor Katsura Izui

Katsura Izui 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).

  • Method to confer formaldehyde-resistance to a plant, and a method to have a plant absorb enviromental formaldehyde
    Patent number: 7973222
    Abstract: According to this invention, by introducing genes encoding hexulose-6-phosphate synthase and 6-phosphohexulose isomerase into a plant to have the genes expressed in the chloroplast of the plant, a transgenic plant having a pathway to assimilate formaldehyde through the Calvin cycle is provided. The transgenic plant according to this invention has resistance to formaldehyde and is capable of reducing the level of environmental formaldehyde significantly. Therefore, it is assumed that the transgenic plant according to this invention can be used to purify environmental condition, by placing it in a residence or in an office.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: July 5, 2011
    Inventors: Katsura Izui, Limei Chen, Nobuo Kato, Yasuyoshi Sakai, Hiroya Yurimoto
  • Plants having increased amino acids content and methods for producing the same
    Publication number: 20030115638
    Abstract: The present invention provides a transformed plant having free-amino acid content increased by introducing phosphoenolpyruvate carboxylase (PEPC) genes, and also a progeny thereof and a seed thereof. Namely, the transformed plant has a nucleic acid construct containing PEPC gene introduced therein, wherein phosphoenolpyruvate carboxylase encoded by the PEPC gene does not require phosphorylation for the activation thereof and/or is independent of acetyl CoA. In particular, the present invention provides a transformed plant comprising a nucleic acid construct containing a nucleic acid molecule encoding Synechococcus vulcanus PEPC or a nucleic acid construct containing a nucleic acid molecule encoding a protein having PEPC activity which has at least 80% of nucleotide sequence homology to said gene.
    Type: Application
    Filed: August 14, 2002
    Publication date: June 19, 2003
    Applicant: AJINOMOTO CO., INC.
    Inventors: Katsura Izui, Tetsuya Miwa, Hiroaki Kisaka, Ai Akiyama
  • Mutant phosphoenolpyruvate carboxylase, its gene, and production method of amino acid
    Patent number: 5919694
    Abstract: A phosphoenolpyruvate carboxylase gene, which has mutation such as mutation to replace 625th glutamic acid from the N-terminus of phosphoenolpyruvate carboxylase with lysine, mutation to replace 438th arginine from the N-terminus with cysteine and the like, is introduced into Escherichia coli or coryneform bacteria, so as to produce a phosphoenolpyruvate carboxylase which is not substantially inhibited by aspartic acid, thereby amino acid is efficiently produced.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: July 6, 1999
    Assignee: Ajinomoto Co., Inc.
    Inventors: Masakazu Sugimoto, Tomoko Suzuki, Hiroshi Matsui, Katsura Izui
  • Mutant phosphoenolpyruvate carboxylase, its gene, and production method of amino acid
    Patent number: 5876983
    Abstract: A phosphoenolpyruvate carboxylase gene, which has mutation such as mutation to replace 625th glutamic acid from the N-terminus of phosphoenolpyruvate carboxylase with lysine, mutation to replace 438th arginine from the N-terminus with cysteine and the like, is introduced into Escherichia coli or coryneform bacteria, so as to produce a phosphoenolpyruvate carboxylase which is not substantially inhibited by aspartic acid, thereby amino acid is efficiently produced.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: March 2, 1999
    Assignee: Ajinomoto Co., Inc.
    Inventors: Masakazu Sugimoto, Tomoko Suzuki, Hiroshi Matsui, Katsura Izui