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Analysis of novel carbon catabolite repression of cellulase expression in filamentous fungi

Research Project

Project/Area Number 17H06763
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Applied microbiology
Research InstitutionMie University

Principal Investigator

Kunitake Emi  三重大学, 生物資源学研究科, 助教 (30800586)

Project Period (FY) 2017-08-25 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsAspergillus nidulans / セルラーゼ / カーボンカタボライト抑制 / 遺伝子発現制御 / 糸状菌 / Aspergillus / 転写制御
Outline of Final Research Achievements

In Aspergillus nidulans, carbon catabolite repression (CCR) of the cellulase genes is regulated by at least two pathways; transcriptional repressor CreA-dependent pathway and cAMP signaling pathway. Transcriptional analyses in deletion mutant of creA, protein kinase A gene (pkaA), and Gα genes revealed that CCR by hexose is independently regulated by CreA and the cAMP signaling pathway (PkaA and GanB), while CCR by pentose mainly depends on CreA. The degree of contribution of CreA, PkaA, or Gα in CCR differs depending on inducers, repressing carbon sources, and cultural conditions.

Academic Significance and Societal Importance of the Research Achievements

本研究では,PkaA及びGanBが既知の転写抑制因子CreAとは独立した経路でセルラーゼ遺伝子のカーボンカタボライト抑制を制御すること,またこれらが誘導物質や抑制炭素源,培養方法によって関与の程度が異なることを明らかにした。この成果は糸状菌の多糖分解酵素遺伝子の発現制御メカニズムの解明の一助となるはずである。また糸状菌のセルラーゼは植物性バイオマスの利活用に役立つ酵素として極めて重要であるため,この成果が効率的なセルラーゼ生産技術の開発につながると期待される。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • Research Products

    (4 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] CreA-independent carbon catabolite repression of cellulase genes by trimeric G-protein and protein kinase A in Aspergillus nidulans2019

    • Author(s)
      Kunitake, E. Li, Y. Uchida, R. Nohara, T. Asano, K. Hattori, A. Kimura, T. Kanamaru, K. Kimura, M. Kobayashi, T.
    • Journal Title

      Current Genetics

      Volume: 印刷中 Issue: 4 Pages: 941-952

    • DOI

      10.1007/s00294-019-00944-4

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Carbon catabolite repression of cellulase genes via protein kinase A pathway in Aspergillus nidulans2019

    • Author(s)
      Emi Kunitake, Yi Li, Ryota Uchida, Takehiro Nohara, Keisuke Asano, Asato Hattori, Tetsuya Kimura, Kyoko Kanamaru, Makoto Kimura, and Tetsuo Kobayashi
    • Organizer
      30th Fungal Genetics Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Aspergillus nidulansおけるGタンパク質αサブユニットを介したセルラーゼ生産抑制2018

    • Author(s)
      國武絵美、李怡、金丸京子、木村真、木村哲哉、小林哲夫
    • Organizer
      日本農芸化学会2018年度大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Aspergillus nidulans における cAMP 依存性プロテインキナーゼ PkaA を介したセルラーゼ生産抑制機構2017

    • Author(s)
      國武絵美、李怡、金丸京子、木村真、木村哲哉、小林哲夫
    • Organizer
      第17回糸状菌分子生物学コンファレンス
    • Related Report
      2017 Annual Research Report

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Published: 2017-08-25   Modified: 2020-03-30  

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