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Elucidation of anaerobic lipid metabolism mechanism of filamentous fungi for polymer production

Research Project

Project/Area Number 20K15436
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 38020:Applied microbiology-related
Research InstitutionThe University of Tokushima

Principal Investigator

SAKAMOTO Takaiku  徳島大学, 大学院社会産業理工学研究部(生物資源産業学域), 講師 (90740332)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords水酸化脂肪酸 / Fusarium / 脂肪酸水和酵素 / 脂質代謝 / 10-ヒドロキシオクタデセン酸 / Ohy / Fusarium属
Outline of Research at the Start

近年、Fusarium属菌において、ポリマー原料となる10-ヒドロキシオクタデセン酸 (HYA) の生産能が報告された。しかし、HYA合成における詳細なメカニズムや生理学的な意味は明らかになっておらず、高生産株の育種に向けて問題となっている。本研究では、Fusarium属菌についてHYA生産機構調節遺伝子の探索、HYA合成酵素の細胞内局在および生理機能の解析、そしてHYA代謝物の解析を行うことで、一連のHYA合成メカニズムの解明を試みる。

Outline of Final Research Achievements

The aim of this project is to elucidate the production and metabolic mechanism of hydroxy fatty acids (HFAs), a raw material for petroleum substitute polymers, in the filamentous fungus Fusarium. Our study on the mechanism of HFAs synthesis by anaerobic lipid metabolic reactions in Fusarium was the first report in fungi. The fatty acid hydratase involved in HFAs synthesis in Fusarium was identified and its unique substrate specificity was revealed. Furthermore, it is suggested that HFAs in Fusarium is converted to the aroma component, lactone, via lipid β-oxidation and cyclization pathways.

Academic Significance and Societal Importance of the Research Achievements

石油代替資源として注目される水酸化脂肪酸(HFA)は総じて細胞毒性が高く、これまで微生物による発酵生産は困難であった。しかし、本研究で見出したFusarium属糸状菌はHFA耐性および蓄積能に優れており、HFA発酵生産における有用な育種対象であることが示された。また、Fusarium内在性のHFA合成酵素を特定したこととHFA代謝経路を推定したことで、今後の育種標的としてHFA高生産株構築が期待できる。さらに、真菌における嫌気的な脂質代謝メカニズムの報告は初めてであり、学術的な貢献度も高いと考えられる。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (4 results)

All 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Microbial production of hydroxy fatty acids utilizing crude glycerol2022

    • Author(s)
      Murakawa Naomi、Sakamoto Takaiku、Kanoh Mizuho、Park Si-Bum、Kishino Shigenobu、Ogawa Jun、Sakuradani Eiji
    • Journal Title

      Biocatalysis and Agricultural Biotechnology

      Volume: 39 Pages: 102286-102286

    • DOI

      10.1016/j.bcab.2022.102286

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Efficient production of biolipids by crude glycerol-assimilating fungi2021

    • Author(s)
      Sakamoto Takaiku、Kamegawa Yuichi、Kurita Chinami、Kanoh Mizuho、Murakawa Naomi、Sakuradani Eiji
    • Journal Title

      Bioresource Technology Reports

      Volume: 16 Pages: 100861-100861

    • DOI

      10.1016/j.biteb.2021.100861

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Studies on filamentous fungus Fusarium sp. accumulating hydroxy fatty acids2022

    • Author(s)
      Eiji Sakuradani, Yoshida Kai, Murakawa Naomi and Takaiku Sakamoto
    • Organizer
      2022 AOCS Annual Meeting & Expo (Web会議)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水酸化脂肪酸生産性糸状菌Fusarium solani D2株の形質転換条件の検討2021

    • Author(s)
      葭田 快, 村川 直美, 阪本 鷹行, 櫻谷 英治
    • Organizer
      2021年度 第3回脂質駆動学術産業創生研究部会講演会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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