Patents by Inventor Mikiko Suga
Mikiko Suga 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).
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Patent number: 7608437Abstract: A method of producing coryneform bacteria having an improved amino acid or nucleic acid-productivity comprises the steps of introducing a mutation in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium so that it is close to a consensus sequence or introducing a change in the promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on the chromosome of a coryneform bacterium by gene recombination so that it is close to a consensus sequence, obtaining mutants of the coryneform amino acid- or nucleic acid-producing microorganism, culturing the mutants and select a mutant capable of producing the intended amino acid or nucleic acid in a large amount. This method allows one of skill in the art to construct a mutant capable of enriching or controlling the expression of an intended gene without using a plasmid and to promote production of amino acids in a high yield, by the recombination or mutation.Type: GrantFiled: September 6, 2005Date of Patent: October 27, 2009Assignee: Ajinomoto Co., Inc.Inventors: Yoko Asakura, Jun Nakamura, Sohei Kanno, Mikiko Suga, Eiichiro Kimura, Hisao Ito, Kazuhiko Matsui, Tsuyoshi Ohsumi, Tsuyoshi Nakamatsu, Osamu Kurahashi
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Patent number: 7419810Abstract: L-Arginine is produced by culturing a coryneform bacterium in which an arginine repressor involved in L-arginine biosynthesis is deleted by disrupting a gene coding for the repressor, and which has L-arginine producing ability in a medium to produce and accumulate L-arginine in the medium, and collecting the L-arginine from the medium.Type: GrantFiled: June 13, 2006Date of Patent: September 2, 2008Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Yukiko Mori, Hisao Ito, Osamu Kurahashi
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Patent number: 7329523Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment. (A) A protein which comprises an amino acid sequence of SEQ ID: 2 in Sequence Listing; or (B) A protein which comprises an amino acid sequence including substitution, deletion, insertion, addition or inversion of one or several amino acids in the amino acid sequence of SEQ ID NO: 2 in Sequence Listing, and which has phosphoserine phosphatase activity.Type: GrantFiled: October 7, 2005Date of Patent: February 12, 2008Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Publication number: 20070031946Abstract: L-Arginine is produced by culturing a coryneform bacterium in which an arginine repressor involved in L-arginine biosynthesis is deleted by disrupting a gene coding for the repressor, and which has L-arginine producing ability in a medium to produce and accumulate L-arginine in the medium, and collecting the L-arginine from the medium.Type: ApplicationFiled: June 13, 2006Publication date: February 8, 2007Applicant: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Yukiko Mori, Hisao Ito, Osamu Kurahashi
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Patent number: 7160705Abstract: L-Arginine is produced by culturing a coryneform bacterium in which an arginine repressor involved in L-arginine biosynthesis is deleted by disrupting a gene coding for the repressor, and which has L-arginine producing ability in a medium to produce and accumulate L-arginine in the medium, and collecting the L-arginine from the medium.Type: GrantFiled: April 17, 2001Date of Patent: January 9, 2007Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Yukiko Mori, Hisao Ito, Osamu Kurahashi
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Publication number: 20060293513Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment. (A) A protein which comprises an amino acid sequence of SEQ ID: 2 in Sequence Listing; or (B) A protein which comprises an amino acid sequence including substitution, deletion, insertion, addition or inversion of one or several amino acids in the amino acid sequence of SEQ ID NO: 2 in Sequence Listing, and which has phosphoserine phosphatase activity.Type: ApplicationFiled: October 7, 2005Publication date: December 28, 2006Applicant: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Patent number: 7029896Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment. (A) A protein which comprises an amino acid sequence of SEQ ID: 2 in Sequence Listing; or (B) A protein which comprises an amino acid sequence including substitution, deletion, insertion, addition or inversion of one or several amino acids in the amino acid sequence of SEQ ID NO: 2 in Sequence Listing, and which has phosphoserine phosphatase activity.Type: GrantFiled: December 18, 2002Date of Patent: April 18, 2006Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Publication number: 20060003424Abstract: A method of producing coryneform bacteria having an improved amino acid- or nucleic acid-productivity comprises the steps of introducing a mutation in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium to make it close to a consensus sequence or introducing a change in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium by gene recombination to make it close to a consensus sequence, to obtain mutants of the coryneform amino acid d- or nucleic acid-producing microorganism, culturing the mutants and select a mutant capable of producing the intended amino acid or nucleic acid in a large amount. This method can construct a mutant capable of suitably enriching or controling the expression of an intended gene without using a plasmid and also capable of producing amino acids in a high yield, by the recombination or mutation.Type: ApplicationFiled: September 6, 2005Publication date: January 5, 2006Inventors: Yoko Asakura, Jun Nakamura, Sohei Kanno, Mikiko Suga, Eiichiro Kimura, Hisao Ito, Kazuhiko Matsui, Tsuyoshi Ohsumi, Tsuyoshi Nakamatsu, Osamu Kurahashi
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Patent number: 6962805Abstract: A method of producing coryneform bacteria having improved amino acid or nucleic acid productivity comprising the steps of introducing a mutation in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium to make it close to a consensus sequence, or introducing a change in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium by gene recombination to make it close to a consensus sequence, to obtain mutants of the coryneform amino acid- or nucleic acid-producing microorganism, culturing the mutants and selecting a mutant capable of producing the intended amino acid or nucleic acid in a large amount. This method allows the construction of a mutant capable of enriching or controlling the expression of an intended gene without using a plasmid and to promote production of amino acids in a high yield by recombination or mutation.Type: GrantFiled: May 25, 2000Date of Patent: November 8, 2005Assignee: Ajinomoto Co., Inc.Inventors: Yoko Asakura, Jun Nakamura, Sohei Kanno, Mikiko Suga, Eiichiro Kimura, Hisao Ito, Kazuhiko Matsui, Tsuyoshi Ohsumi, Tsuyoshi Nakamatsu, Osamu Kurahashi
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Publication number: 20040002143Abstract: A method of producing coryneform bacteria having an improved amino acid- or nucleic acid-productivity comprises the steps of introducing a mutation in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium to make it close to a consensus sequence or introducing a change in a promoter sequence of amino acid- or nucleic acid-biosynthesizing genes on a chromosome of a coryneform bacterium by gene recombination to make it close to a consensus sequence, to obtain mutants of the coryneform amino acid- or nucleic acid-producing microorganism, culturing the mutants and select a mutant capable of producing the intended amino acid or nucleic acid in a large amount. This method can construct a mutant capable of suitably enriching or controling the expression of an intended gene without using a plasmid and also capable of producing amino acids in a high yield, by the recombination or mutation.Type: ApplicationFiled: May 25, 2000Publication date: January 1, 2004Inventors: Yoko Asakura, Jun Nakamura, Sohei Kanno, Mikiko Suga, Eiichiro Kimura, Hisao Ito, Kazuhiko Matsui, Tsuyoshi Ohsumi, Tsuyoshi Nakamatsu, Osamu Kurahashi
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Publication number: 20030175912Abstract: L-serine is produced by cultivating in a medium a coryneform bacterium having L-serine productivity in which an activity of at least one of phosphoserine phosphatase and phosphoserine transaminase is enhanced, preferably, further having introduced therein a gene coding for D-3-phosophoglycerate dehydrogenase in which feedback inhibition by L-serine is desensitizied, allowing L-serine to accumulate in the medium, and collecting the L-serine from the medium.Type: ApplicationFiled: December 17, 2002Publication date: September 18, 2003Applicant: AJINOMOTO CO. INCInventors: Mikiko Suga, Masakazu Sugimoto, Tsuyoshi Osumi, Tsuyoshi Nakamatsu, Wataru Hibino, Mika Ito
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Publication number: 20030124686Abstract: Disclosed is a coryneform bacterium having L-arginine-producing ability in which an activity of intracellular argininosuccinate synthase is enhanced, wherein the activity of intracellular argininosuccinate synthase is enhanced by, for example, increasing copy number of a gene which codes for an argininosuccinate synthase derived form a coryneform bacterium in the bacterial cell, or modifying an expression regulation sequence for the gene in the bacterial cell so that expression of the gene should be enhanced. L-Arginine is produced by culturing the bacterium having L-arginine-producing ability in a medium so that L-arginine should be produced and accumulated, and collecting the L-arginine from the medium. The present invention provides a coryneform bacterium of improved L-arginine-producing ability and an efficient method for producing L-arginine.Type: ApplicationFiled: October 23, 2002Publication date: July 3, 2003Applicant: AJINOMOTO CO. INC.Inventors: Mikiko Suga, Yoko Kuwabara, Kenichi Hashiguchi, Hisao Ito, Tsuyoshi Nakamatsu, Osamu Kurahashi
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Publication number: 20030114656Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment.Type: ApplicationFiled: December 18, 2002Publication date: June 19, 2003Applicant: AJINOMOTO CO. INCInventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Publication number: 20030008358Abstract: Disclosed is a coryneform bacterium having resistance to azaserine or &bgr;-(2-thienyl)-DL-alanine and having L-serine productivity.Type: ApplicationFiled: July 16, 2002Publication date: January 9, 2003Applicant: AJINOMOTO CO. INCInventors: Mikiko Suga, Masakazu Sugimoto, Tsuyoshi Osumi, Tsuyoshi Nakamatsu, Wataru Hibino, Mika Ito
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Publication number: 20020120122Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment.Type: ApplicationFiled: February 25, 2002Publication date: August 29, 2002Applicant: AJINOMOTO CO. INCInventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Patent number: 6395528Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment. (A) A protein which comprises an amino acid sequence of SEQ ID: 2 in Sequence Listing; or (B) A protein which comprises an amino acid sequence including substitution, deletion, insertion, addition or inversion of one or several amino acids in the amino acid sequence of SEQ ID NO: 2 in Sequence Listing, and which has phosphoserine phosphatase activity.Type: GrantFiled: January 18, 2001Date of Patent: May 28, 2002Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Publication number: 20020045223Abstract: L-Arginine is produced by culturing a coryneform bacterium in which an arginine repressor involved in L-arginine biosynthesis is deleted by disrupting a gene coding for the repressor, and which has L-arginine producing ability in a medium to produce and accumulate L-arginine in the medium, and collecting the L-arginine from the medium.Type: ApplicationFiled: April 17, 2001Publication date: April 18, 2002Applicant: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Yukiko Mori, Hisao Ito, Osamu Kurahashi
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Publication number: 20020038008Abstract: The present invention provides a DNA coding for a protein defined in the following (A) or (B) is obtained from Brevibacterium flavum chromosomal DNA library by cloning a DNA fragment that complicates serB deficiency of Escherichia coli as a open reading frame in the DNA fragment.Type: ApplicationFiled: January 18, 2001Publication date: March 28, 2002Applicant: Ajnomoto Co., Inc.Inventors: Mikiko Suga, Yoko Asakura, Masakazu Sugimoto, Hisao Ito
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Patent number: 6258573Abstract: Disclosed is a coryneform bacterium having resistance to azaserine or &bgr;-(2-thienyl)-DL-alanine and having L-serine productivity.Type: GrantFiled: December 30, 1998Date of Patent: July 10, 2001Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Masakazu Sugimoto, Tsuyoshi Osumi, Tsuyoshi Nakamatsu, Wataru Hibino, Mika Ito
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Patent number: 6037154Abstract: L-serine is produced by cultivating in a medium a coryneform bacterium having L-serine productivity in which an activity of at least one of phosphoserine phosphatase and phosphoserine transaminase is enhanced, preferably, further having introduced therein a gene coding for D-3-phosophoglycerate dehydrogenase in which feedback inhibition by L-serine is desensitized, allowing L-serine to accumulate in the medium, and collecting the L-serine from the medium.Type: GrantFiled: December 30, 1998Date of Patent: March 14, 2000Assignee: Ajinomoto Co., Inc.Inventors: Mikiko Suga, Masakazu Sugimoto, Tsuyoshi Osumi, Tsuyoshi Nakamatsu, Wataru Hibino, Mika Ito