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Mechanism of allosteric dissociation by regulator proteins of actin filament elongation

Research Project

Project/Area Number 19K12217
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 62010:Life, health and medical informatics-related
Research InstitutionNagoya University

Principal Investigator

Koike Ryotaro  名古屋大学, 情報学研究科, 助教 (20381577)

Project Period (FY) 2019-04-01 – 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: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords動的構造 / 分子シミュレーション / アクチン
Outline of Research at the Start

アクチンフィラメントの伸び縮みは,細胞の変形や運動という生命にとって普遍的な現象と密接に関わる.本研究では,フィラメントの伸縮に関わるCARMIL蛋白質とキャッピング蛋白質(CP)に着目し,CARMILによるCPのフィラメントからの引きはがし(結合解離)の分子メカニズムを調査する.まず解離過程の分子シミュレーションを行う.このときフィラメントの代わりにV-1蛋白質を用いる.得られたシミュレーションのデータを,独自に開発した計算機ツールMotion Treeを用いて調査し,特徴的な分子運動を特定する.分子運動と結合の関係を探り,結合解離の分子メカニズムを調査する.

Outline of Final Research Achievements

Actin filament elongation is regulated by a number of proteins. Actin capping protein (CP) binds to the end of filament and inhibits their elongation, whereas CARMIL protein binds to CP and can dissociate it from filament. Structural flexibility of CP is expected to be the key to this dissociation. In this study, using molecular dynamics simulation and elastic network model, we comprehensively investigated the effect of binding of CARMIL on the flexibility of CP. As a result, we clarified which part of CARMIL significantly changes the flexibility of CP. We also clarified the characteristics binding patterns of the parts that change the flexibility.

Academic Significance and Societal Importance of the Research Achievements

アクチンフィラメントの伸長は細胞の変形や運動という普遍的な生命現象に直結している.フィラメントを制御する蛋白質の研究は,細胞の変形・運動といったマクロな現象が,分子レベルでどのように実現されているのかを理解するために欠かせなない.制御蛋白質の働きには揺らぎが関わっている.蛋白質間の結合と揺らぎがどのように関係するか,分子シミュレーションや弾性ネットワークモデルを使って網羅的に解析し,結合と揺らぎの関係を明らかにした.結合と揺らぎに関する知見は,フィラメントの伸長を制御する蛋白質の働きをコトンロールするための基盤となる.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (10 results) (of which Int'l Joint Research: 2 results) Book (1 results)

  • [Journal Article] Structures and mechanisms of actin ATP hydrolysis2022

    • Author(s)
      Kanematsu Yusuke、Narita Akihiro、Oda Toshiro、Koike Ryotaro、Ota Motonori、Takano Yu、Moritsugu Kei、Fujiwara Ikuko、Tanaka Kotaro、Komatsu Hideyuki、Nagae Takayuki、Watanabe Nobuhisa、Iwasa Mitsusada、Ma?da Yuichiro、Takeda Shuichi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 43

    • DOI

      10.1073/pnas.2122641119

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural insights into the regulation of actin capping protein by twinfilin C-terminal tail2021

    • Author(s)
      Shuichi Takeda, Ryotaro Koike, Ikuko Fujiwara, Akihiro Narita, Makoto Miyata, Motonori Ota and Yuichiro Maeda
    • Journal Title

      J Mol Biol

      Volume: 433 Issue: 9 Pages: 166891-166891

    • DOI

      10.1016/j.jmb.2021.166891

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Crystal structure of human V-1 in the apo form2021

    • Author(s)
      Shuichi Takeda, Ryotaro Koike, Takayuki Nagae, Ikuko Fujiwara, Akihiro Narita, Yuichiro Maeda, Motonori Ota
    • Journal Title

      Acta Crystallogr F Struct Biol Commun

      Volume: 77 Issue: 1 Pages: 13-21

    • DOI

      10.1107/s2053230x20016829

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Protein kinases phosphorylate long disordered regions in intrinsically disordered proteins2019

    • Author(s)
      Koike Ryotaro、Amano Mutsuki、Kaibuchi Kozo、Ota Motonori
    • Journal Title

      Protein Science

      Volume: 29 Issue: 2 Pages: 564-571

    • DOI

      10.1002/pro.3789

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] All Atom Motion Tree detects side chain-related motions and their coupling with domain motion in proteins2019

    • Author(s)
      Koike Ryotaro、Ota Motonori
    • Journal Title

      Biophysics and Physicobiology

      Volume: 16 Issue: 0 Pages: 280-286

    • DOI

      10.2142/biophysico.16.0_280

    • NAID

      130007752770

    • ISSN
      2189-4779
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Structural changes of ATPase complexes in the PDB2022

    • Author(s)
      Ryotaro Koike
    • Organizer
      第60回日本生物物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 天然変性タンパク質データベース:IDEAL2022

    • Author(s)
      ANBO Hiroto, SAKUMA Koya, KADO Yumiko, SAKAMOTO Shigetaka, HOSODA Kazuo, SHIKAMA Noriko, DAIYASU Hiromi, TAKAGI Daisuke, YAMAGUCHI Atsuko, HATANAKA Hideki, KOIKE Ryotaro, HIROAKI Hidekazu, FUKUCHI Satoshi, OTA Motonori
    • Organizer
      トーゴーの日シンポジウム2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 異なる機能状態にあるアクチンの構造ゆらぎとその相関関係2021

    • Author(s)
      小池亮太郎,森次圭,太田元規
    • Organizer
      第21回日本蛋白質科学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Elastic network model analysis shows distinct flexibilities of capping protein bound to CARMIL or twinfilin2021

    • Author(s)
      Ryotaro Koike, Motonori Ota
    • Organizer
      第59回日本生物物理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Structural flexibility of actin in molecular dynamics simulation2021

    • Author(s)
      Ryotaro Koike, Motonori Ota
    • Organizer
      環太平洋国際化学会議2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structural flexibility of actin studied by molecular dynamics simulation2020

    • Author(s)
      Ryotaro Koike, Motonori Ota
    • Organizer
      第58回日本生物物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 全原子Motion Treeとドメイン運動に伴う側鎖の運動2019

    • Author(s)
      小池亮太郎,太田元規
    • Organizer
      第19回日本蛋白質科学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] タンパク質ータンパク質間相互作用の有向ネットワークが示す細胞内情報伝達2019

    • Author(s)
      葉山雄揮,小池亮太郎,太田元規
    • Organizer
      第19回日本蛋白質科学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Full-atom Motion Tree detects side-chain motions and their coupling with domain motions2019

    • Author(s)
      Ryotaro Koike, Motonori Ota
    • Organizer
      第57回日本生物物理学会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structural flexibility of actin monomer in molecular dynamics simulation2019

    • Author(s)
      Ryotaro Koike, Motonori Ota
    • Organizer
      11th Toyota Riken International Workshop, Actin Workshop
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Book] Protein Structural Changes Based on Structural Comparison (Chapter 8 of eBook "Practical Guide to Life Science Databases" edited by Imad Abugessaisa, Takeya Kasukawa)2022

    • Author(s)
      Koike Ryotaro, Ota Motonori
    • Total Pages
      224
    • Publisher
      Springer Nature
    • ISBN
      9789811658129
    • Related Report
      2021 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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