Invention Grant
- Patent Title: Biocatalyst for production of D-lactic acid
- Patent Title (中): 用于生产D-乳酸的生物催化剂
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Application No.: US10573813Application Date: 2004-09-17
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Publication No.: US08669093B2Publication Date: 2014-03-11
- Inventor: Mitsufumi Wade , Toshihiro Oikawa , Daisuke Mochizuki , Junko Tokuda , Miyuki Kawashima , Tadashi Araki , Reiko Abe , Hitoki Miyake , Hitoshi Takahashi , Hideki Sawai , Takashi Mimitsuka , Takashi Morishige , Yosuke Higashi
- Applicant: Mitsufumi Wade , Toshihiro Oikawa , Daisuke Mochizuki , Junko Tokuda , Miyuki Kawashima , Tadashi Araki , Reiko Abe , Hitoki Miyake , Hitoshi Takahashi , Hideki Sawai , Takashi Mimitsuka , Takashi Morishige , Yosuke Higashi
- Applicant Address: JP Minato-Ku, Tokyo
- Assignee: Mitsui Chemicals, Inc.
- Current Assignee: Mitsui Chemicals, Inc.
- Current Assignee Address: JP Minato-Ku, Tokyo
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: JP2003-340062 20030930; JP2003-342165 20030930; JP2003-342222 20030930; JP2004-150252 20040520; JP2004-150253 20040520
- International Application: PCT/JP2004/014037 WO 20040917
- International Announcement: WO2005/033324 WO 20050414
- Main IPC: C12N1/21
- IPC: C12N1/21 ; C12P7/56 ; C12N1/26

Abstract:
A method for producing D-lactic acid in high yield, and to provide a method for producing D-lactic acid with high selectivity, in which optical purity is high and a by-product organic acid is small. In one aspect, a microorganism, wherein activity of pyruvate formate-lyase (pfl) is inactivated or decreased, and further activity of Escherichia coli-derived NADH-dependent D-lactate dehydrogenase (ldhA) is enhanced, is cultured to efficiently produce D-lactic acid. With regard to a method for enhancing ldhA activity, by linking, on a genome, a gene encoding ldhA with a promoter of a gene which controls expression of a protein involved in a glycolytic pathway, a nucleic acid biosynthesis pathway or an amino acid biosynthesis pathway, suitable results are obtained compared to the method for enhancing expression of the gene using an expression vector. A microorganism in which a dld gene is substantially inactivated or decreased is cultured to produce high quality D-lactic acid with reduced concentration of pyruvic acid.
Public/Granted literature
- US20070065930A1 Biocatalyst for production of d-lactic acid (as amended) Public/Granted day:2007-03-22
Information query
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