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The molecular architecture and regulation of the PDH-ODH hybrid complex

Research Project

Project/Area Number 20K05803
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 38020:Applied microbiology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kosono Saori  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (90321760)

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 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords2-オキソ酸デヒドロゲナーゼ複合体 / PDH / ODH / Corynebacterium / リジンアセチル化 / グルタミン酸生産 / ピルビン酸デヒドロゲナーゼ / 2-オキソグルタル酸デヒドロゲナーゼ / アセチル化
Outline of Research at the Start

Corynebacterium glutamicumにおけるPDHとODHについて、超遠心分画を用いた解析法によりin vivoでの各複合体の動態を調べる。またPDH及びODHを構成するサブユニットタンパク質の組換えタンパク質を用いてin vitro再構成系を構築する。サブユニット組成および活性との相関、ODH活性制御因子がハイブリッド複合体形成に与える影響、サブユニット結合ドメイン変異が複合体形成や2つの酵素活性に与える影響をin vivoとin vitroの両面から検討し、ハイブリッド複合体の分子構造基盤、さらにはPDH-ODH活性バランス制御のメカニズムと生物学的意義の解明を目指す。

Outline of Final Research Achievements

Pyruvate dehydrogenase (PDH) and 2-oxoglutarate dehydrogenase (ODH) from Corynebacterium glutamicum exist as a unique hybrid complex in which CgE1p and CgE1o simultaneously associate with the CgE2-CgE3 subcomplex. In this study, we have elucidated the molecular structure of the hybrid complex, including the subunit composition. In vivo and in vitro studies revealed that the hybrid complex has a compact size compared to PDH and ODH from E. coli. In addition, the existence of mechanisms that flexibly regulate PDH and ODH activities, including differences in the binding affinities of the two E1 subunits for the CgE2 subunit, acetylation of the CgE2-PSBD domain, and CgE1o multimerization, was suggested.

Academic Significance and Societal Importance of the Research Achievements

Corynebacterium glutamicumにおけるユニークなPDH-ODHハイブリッド複合体の分子構造基盤を初めて詳細に明らかにした。また、2つのE1サブユニットのCgE2への結合親和性の違いや、CgE2-PSBDドメインのアセチル化、CgE1o多量体形成など、PDHおよびODH活性を柔軟に調節する機構の一端を明らかにした。PDHおよびODH活性調節は中心炭素代謝フロー制御に重要な役割を持つため、これらの成果はC. glutamicumを用いた有用物質生産の代謝デザインに重要な知見となることが期待される。

Report

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

    (7 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results) (of which Invited: 1 results) Book (1 results)

  • [Journal Article] Characterization of lysine acetylation in the peripheral subunit-binding domain of the E2 subunit of the pyruvate dehydrogenase-2-oxoglutarate dehydrogenase hybrid complex from <i>Corynebacterium glutamicum</i>2021

    • Author(s)
      Komine-Abe Ayano、Kondo Naoko、Kubo Shosei、Kawasaki Hisashi、Nishiyama Makoto、Kosono Saori
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 85 Issue: 4 Pages: 874-881

    • DOI

      10.1093/bbb/zbaa114

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] In vitro reconstitution and characterization of pyruvate dehydrogenase and 2‐oxoglutarate dehydrogenase hybrid complex from Corynebacterium glutamicum2020

    • Author(s)
      Kinugawa Hirokazu、Kondo Naoko、Komine‐Abe Ayano、Tomita Takeo、Nishiyama Makoto、Kosono Saori
    • Journal Title

      MicrobiologyOpen

      Volume: 9 Issue: 10

    • DOI

      10.1002/mbo3.1113

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 細菌のタンパク質アシル化修飾と制御、個性、記憶2023

    • Author(s)
      古園さおり
    • Organizer
      第5回応用微生物学ルネサンスセンター講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Corynebacterium glutamicumのグルタミン酸生産と関連したクエン酸合成酵素の集合体形成2023

    • Author(s)
      長岡誠、古園さおり、西山真
    • Organizer
      日本農芸化学会2023年度大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 細菌のタンパク質アシル化修飾と制御、個性、記憶-Corynebacterium glutamicumのグルタミン酸生産を例に2022

    • Author(s)
      古園さおり
    • Organizer
      第45回分子生物学会年会フォーラム
    • Related Report
      2022 Annual Research Report
  • [Presentation] Corynebacterium glutamicum由来PDH-ODHハイブリッド複合体のE2サブユニットPSBDアセチル化部位の機能解析2020

    • Author(s)
      小峰(阿部)理乃,近藤直子,久保翔世,西山真,古園さおり
    • Organizer
      2020年度グラム陽性細菌ゲノム機能会議
    • Related Report
      2020 Research-status Report
  • [Book] Post-translational modifications in Corynebacterium glutamicum In Microbiology Monographs Corynebacterium glutamicum2020

    • Author(s)
      Saori Kosono
    • Total Pages
      24
    • Publisher
      Springer Nature Switzerland
    • ISBN
      9783030392673
    • Related Report
      2020 Research-status Report

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

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