Patents by Inventor Fumikazu Yokoyama

Fumikazu Yokoyama 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: 10774318
    Abstract: An object is to identify endoglucanase and ?-glucosidase genes by isolating genomic DNA containing cellulase genes, which are classified into endoglucanases or ?-glucosidases, from Acremonium cellulolyticus, and sequencing the nucleotide sequences thereof. The inventors intensively compared the amino acid sequences of known endoglucanases and ?-glucosidases with each other to find conserved region of amino acid sequences in Acremonium cellulolyticus, and various primers were designed based on the information. PCR was carried out using the various primers thus designed and genomic DNA or cDNA as a template. As a result, gene fragments of endoglucanases and ?-glucosidases were obtained. Primers were designed based on the gene fragments, and PCR was carried out to amplify nine genes of endoglucanases and ?-glucosidases. The nucleotide sequences thereof were sequenced, and the present invention was completed.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: September 15, 2020
    Assignee: MEIJI SEIKA PHARMA CO., LTD.
    Inventor: Fumikazu Yokoyama
  • Publication number: 20180327729
    Abstract: An object is to identify endoglucanase and ?-glucosidase genes by isolating genomic DNA containing cellulase genes, which are classified into endoglucanases or ?-glucosidases, from Acremonium cellulolyticus, and sequencing the nucleotide sequences thereof. The inventors intensively compared the amino acid sequences of known endoglucanases and ?-glucosidases with each other to find conserved region of amino acid sequences in Acremonium cellulolyticus, and various primers were designed based on the information. PCR was carried out using the various primers thus designed and genomic DNA or cDNA as a template. As a result, gene fragments of endoglucanases and ?-glucosidases were obtained. Primers were designed based on the gene fragments, and PCR was carried out to amplify nine genes of endoglucanases and ?-glucosidases. The nucleotide sequences thereof were sequenced, and the present invention was completed.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 15, 2018
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventor: Fumikazu Yokoyama
  • Patent number: 10125355
    Abstract: By combination of hydrophobic chromatography and strongly basic anion-exchange chromatography, a novel, highly hydrophobic ?-glucosidase was successfully identified from Acremonium cellulolyticus. Further, a gene corresponding to the identified ?-glucosidase was isolated. When multiple modifications were introduced into the base sequence of the gene, the gene was successfully expressed in Trichoderma viride at a high level, and the expression product successfully exhibited a high ?-glucosidase activity.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: November 13, 2018
    Assignee: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Fumikazu Yokoyama, Kengo Yokoyama, Nobuko Mazuka
  • Patent number: 10053679
    Abstract: An object is to identify endoglucanase and ?-glucosidase genes by isolating genomic DNA containing cellulase genes, which are classified into endoglucanases or ?-glucosidases, from Acremonium cellulolyticus, and sequencing the nucleotide sequences thereof. The inventors intensively compared the amino acid sequences of known endoglucanases and ?-glucosidases with each other to find conserved region of amino acid sequences in Acremonium cellulolyticus, and various primers were designed based on the information. PCR was carried out using the various primers thus designed and genomic DNA or cDNA as a template. As a result, gene fragments of endoglucanases and ?-glucosidases were obtained. Primers were designed based on the gene fragments, and PCR was carried out to amplify nine genes of endoglucanases and ?-glucosidases. The nucleotide sequences thereof were sequenced, and the present invention was completed.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: August 21, 2018
    Assignee: MEIJI SEIKA PHARMA CO., LTD.
    Inventor: Fumikazu Yokoyama
  • Patent number: 10017756
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: July 10, 2018
    Assignees: MITSUI CHEMICALS, INC., MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Hisaaki Yanai, Hiroki Tamai, Masami Osabe, Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue
  • Publication number: 20170107502
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Application
    Filed: January 3, 2017
    Publication date: April 20, 2017
    Applicants: MITSUI CHEMICALS, INC., MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Hisaaki YANAI, Hiroki TAMAI, Masami OSABE, Fumikazu YOKOYAMA, Kaoru OKAKURA, Atsushi INOUE
  • Patent number: 9567617
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: February 14, 2017
    Assignees: MITSUI CHEMICALS, INC., MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Hisaaki Yanai, Hiroki Tamai, Masami Osabe, Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue
  • Patent number: 9540617
    Abstract: A modified polynucleotide has a different base sequence in at least one codon from a wild-type base sequence encoding a horseradish peroxidase polypeptide. The usage frequency of the modified codon of the polynucleotide corresponds to the codon usage frequencies of three filamentous fungal species in Humicola, Aspergillus, and Trichoderma. The polynucleotide is capable of expressing the polypeptide to be encoded in a filamentous fungus.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: January 10, 2017
    Assignee: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue, Koichiro Murashima, Toshiaki Nagasato, Koji Yanai, Akitaka Nakane
  • Patent number: 9394554
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: July 19, 2016
    Assignees: Mitsui Chemicals, Inc., Meiji Seika Pharma Co., Ltd.
    Inventors: Hisaaki Yanai, Hiroki Tamai, Masami Osabe, Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue
  • Publication number: 20160168555
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Application
    Filed: February 12, 2016
    Publication date: June 16, 2016
    Applicants: Mitsui Chemicals, Inc., Meiji Seika Pharma Co., Ltd.
    Inventors: Hisaaki YANAI, Hiroki TAMAI, Masami OSABE, Fumikazu YOKOYAMA, Kaoru OKAKURA, Atsushi INOUE
  • Publication number: 20150140574
    Abstract: A modified polynucleotide has a different base sequence in at least one codon from a wild-type base sequence encoding a horseradish peroxidase polypeptide. The usage frequency of the modified codon of the polynucleotide corresponds to the codon usage frequencies of three filamentous fungal species in Humicola, Aspergillus, and Trichoderma. The polynucleotide is capable of expressing the polypeptide to be encoded in a filamentous fungus.
    Type: Application
    Filed: May 30, 2013
    Publication date: May 21, 2015
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue, Koichiro Murashima, Toshiaki Nagasato, Koji Yanai, Akitaka Nakane
  • Publication number: 20150104833
    Abstract: By combination of hydrophobic chromatography and strongly basic anion-exchange chromatography, a novel, highly hydrophobic ?-glucosidase was successfully identified from Acremonium cellulolyticus. Further, a gene corresponding to the identified ?-glucosidase was isolated. When multiple modifications were introduced into the base sequence of the gene, the gene was successfully expressed in Trichoderma viride at a high level, and the expression product successfully exhibited a high ?-glucosidase activity.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Fumikazu YOKOYAMA, Kengo YOKOYAMA, Nobuko MAZUKA
  • Patent number: 8975057
    Abstract: By combination of hydrophobic chromatography and strongly basic anion-exchange chromatography, a novel, highly hydrophobic ?-glucosidase was successfully identified from Acremonium cellulolyticus. Further, a gene corresponding to the identified ?-glucosidase was isolated. When multiple modifications were introduced into the base sequence of the gene, the gene was successfully expressed in Trichoderma viride at a high level, and the expression product successfully exhibited a high ?-glucosidase activity.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: March 10, 2015
    Assignee: Meiji Seika Pharma Co., Ltd.
    Inventors: Fumikazu Yokoyama, Kengo Yokoyama, Nobuko Mazuka
  • Publication number: 20140322764
    Abstract: What is aimed at is provision of an inexpensive and efficient saccharification method for lignocellulose using a thermostable xylanase and provision of a mutant xylanase that has a substitute amino acid residue, and that exhibits stable activity even under severe conditions in which enzymes easily inactivate, and that provides an initial rate of reaction not significantly reduced as compared to a wild-type xylanase corresponding to the mutant xylanase. Provided is a method of producing a saccharified product of lignocellulose, including contacting a lignocellulosic raw material with a thermostable xylanase, and a mutant xylanase that provides an initial rate of reaction that is at least 70% of that provided by a wild-type xylanase corresponding thereto, that has a xylanase activity after heat treatment at 50° C. for 24 hours that is at least 50% of its xylanase activity before the heat treatment, and that has a substitute amino acid residue.
    Type: Application
    Filed: November 22, 2012
    Publication date: October 30, 2014
    Inventors: Hisaaki Yanai, Hiroki Tamai, Masami Osabe, Fumikazu Yokoyama, Kaoru Okakura, Atsushi Inoue
  • Publication number: 20130023014
    Abstract: An object is to identify endoglucanase and ?-glucosidase genes by isolating genomic DNA containing cellulase genes, which are classified into endoglucanases or ?-glucosidases, from Acremonium cellulolyticus, and sequencing the nucleotide sequences thereof. The inventors intensively compared the amino acid sequences of known endoglucanases and ?-glucosidases with each other to find conserved region of amino acid sequences in Acremonium cellulolyticus, and various primers were designed based on the information. PCR was carried out using the various primers thus designed and genomic DNA or cDNA as a template. As a result, gene fragments of endoglucanases and ?-glucosidases were obtained. Primers were designed based on the gene fragments, and PCR was carried out to amplify nine genes of endoglucanases and ?-glucosidases. The nucleotide sequences thereof were sequenced, and the present invention was completed.
    Type: Application
    Filed: March 31, 2010
    Publication date: January 24, 2013
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventor: Fumikazu Yokoyama
  • Publication number: 20120148706
    Abstract: By combination of hydrophobic chromatography and strongly basic anion-exchange chromatography, a novel, highly hydrophobic ?-glucosidase was successfully identified from Acremonium cellulolyticus. Further, a gene corresponding to the identified ?-glucosidase was isolated. When multiple modifications were introduced into the base sequence of the gene, the gene was successfully expressed in Trichoderma viride at a high level, and the expression product successfully exhibited a high ?-glucosidase activity.
    Type: Application
    Filed: August 17, 2010
    Publication date: June 14, 2012
    Applicant: MEIJI SEIKA PHARMA CO., LTD.
    Inventors: Fumikazu Yokoyama, Kengo Yokoyama, Nobuko Mazuka
  • Patent number: 7501431
    Abstract: This invention provides novel PF1270A substance, PF1270B substance and PF1270C substance represented by the following formula (1) or pharmaceutically acceptable salts thereof, a method for producing the same and a pharmaceutical composition which comprises at least one of the same as the active ingredient. Since a group of the PF1270 substances of the invention show high affinity for histamine H3 receptor, they are expected as novel histamine H3 receptor ligands useful as medicaments.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: March 10, 2009
    Assignee: Meui Seika Kaisha, Ltd.
    Inventors: Nobuaki Kushida, Naoko Watanabe, Takashi Yaguchi, Fumikazu Yokoyama, Goh Tsujiuchi, Takako Okuda
  • Publication number: 20070105883
    Abstract: This invention provides novel PF1270A substance, PF1270B substance and PF1270C substance represented by the following formula (1) or pharmaceutically acceptable salts thereof, a method for producing the same and a pharmaceutical composition which comprises at least one of the same as the active ingredient. Since a group of the PF1270 substances of the invention show high affinity for histamine H3 receptor, they are expected as novel histamine H3 receptor ligands useful as medicaments.
    Type: Application
    Filed: March 29, 2004
    Publication date: May 10, 2007
    Inventors: Nobuaki Kushida, Naoko Watanabe, Takashi Yaguchi, Fumikazu Yokoyama, Goh Tsujiuchi, Takako Okuda