| Project/Area Number |
18K05400
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 38020:Applied microbiology-related
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| Research Institution | Kyoto University |
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Principal Investigator |
Hara Ryotaro 京都大学, 農学研究科, 特定准教授 (70553535)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | Screening / Hydroxylase / Enzyme / Hydroxy amino acid / Dioxygenase / 3-Hydroxyhistidine / 3-Hydroxyglutamine / Insufficient TCA-cycle / 3-Hydroxyhisitidine / Broken TCA cycle / dioxygenase / screening / amino acid / 2-oxoglutarate / hydroxylation / trans-3-hydroxyproline / 3-hydroxyhistidine / 3-hydroxyglutamine / hydroxy amino acid / Escherichia coli / bioproduction / hydroxylase |
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| Outline of Final Research Achievements |
To satisfy a need for a method to produce hydroxy amino acids, which are promising materials for pharmaceutical development, bioprocesses with environmentally friendly and high efficiency are promising. In this study, we aimed to develop a useful hydroxy amino acid production process by effective tools for screening and modifying the enzymes that play a central role in the bioprocess. In this study, we obtained three findings. First, we developed the screening system to complement the growth of engineered E. coli by amino acid hydroxylase. Then, in the production of trans-3-hydroxy-L-proline using the E. coli, the excessive degradation of the cosubstrate was suppressed. Furthermore, we found a novel enzyme that hydroxylates L-histidine and L-glutamine in a threo-selevtive manner.
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| Academic Significance and Societal Importance of the Research Achievements |
アミノ酸誘導体は、医薬品開発における重要な原料である。しかし、実用的に生産可能なものは限られている。アミノ酸誘導体の中でも、特にヒドロキシアミノ酸の合成は、従来法では多段階反応を要するため、シンプルな生産法が求められている。本研究で得た酵素は、化学合成では困難な位置選択的かつ立体選択的な水酸化により、ヒドロキシアミノ酸の生産を可能とする。成果物であるL-threo-3-ヒドロキシヒスチジンやL-threo-3-ヒドロキシグルタミンは合成例がなく、分子多様性が求められる医薬品開発に貢献できると考える。
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