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Anaysis of the actin filament as a mechano-sensor

Research Project

Project/Area Number 18K06167
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionKanazawa Institute of Technology

Principal Investigator

Tatsumi Hitoshi  金沢工業大学, バイオ・化学部, 教授 (20171720)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsアクチン線維 / 力学受容 / メカノセンサー / 一分子イメージング / 一分子力学刺激 / 偏光測定 / 分子揺らぎ / メカノバイオロジー / 偏光 / ねじれ / 曲げ / 力学刺激受容機構 / 機械刺激 / 一分子 / 蛍光 / 顕微鏡 / 量子ドット / 張力センサー / 一分子計測 / 超高解像
Outline of Final Research Achievements

Mechanical force changes the mechanical conditions within the cells and accelerates the reorganization of cytoskeletons in a variety of cells. The molecular mechanisms underlying how tension modulates the mechanical behaviors of a single actin filament have been an important target of investigations. In this study, a direct measurement of the twisting and bending fluctuations of a single actin filament under stresses was performed by employing single-molecule imaging microscopy. We report that the amplitude of the torsional fluctuations and the bending fluctuations of a single actin filament were affected by the force application. The molecular importance of the decrease in the amplitude of the fluctuations for binding of actin-binding proteins is discussed.

Academic Significance and Societal Importance of the Research Achievements

細胞の生体膜や細胞骨格は外部からの力が働き、細胞の成長、形態変化、運動に伴って変化して、細胞応答を修飾する。機械的ストレスの大きな場所に誘引される中胚葉性幹細胞の存在も知られている。機械受容性幹細胞に抗がん作用を持たせ、がん治療に応用する研究も始まっている。このように力受容は生命科学において重要な地位を締めているが力の受容を行っている分子機構のほとんどは未解明の状態である。本研究の成果はこの力の受容を細胞内のアクチン線維が行っていることを示す研究となっている。また力の受容の分子機構が分かってきたことで力の受容機構をターゲットとする医薬品や医療機器の開発につながる研究に発展すると期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2021 2020 2019 2018

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (2 results) (of which Invited: 1 results) Book (1 results)

  • [Journal Article] The gravistimulation-induced very slow Ca 2+ increase in Arabidopsis seedlings requires MCA1, a Ca 2+-permeable mechanosensitive channel2021

    • Author(s)
      Nakano, M,m Furuichi, T., Sokabe, M., Iida, H., and Tatsumi H.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41598-020-80733-z

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] シロイヌナズナの重力受容の分子機構を探し求めて2020

    • Author(s)
      辰巳仁史
    • Journal Title

      BSJ-Review

      Volume: 11 Issue: A Pages: 4-10

    • DOI

      10.24480/bsj-review.11a2.00174

    • ISSN
      2432-9819
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Real-Time Single-Molecule Kinetic Analyses of AIP1-Enhanced Actin Filament Severing in the Presence of Cofilin.2019

    • Author(s)
      Hayakawa, K., C. Sekiguchi, M. Sokabe, S. Ono, and H. Tatsumi
    • Journal Title

      J Mol Biol.

      Volume: 431 Issue: 2 Pages: 308-322

    • DOI

      10.1016/j.jmb.2018.11.010

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Remote sensing of ciliary beating using a SQUID gradiometer2019

    • Author(s)
      Ryota Makibatake, Daisuke Oyama, Jun Kawai, and Hitoshi Tatsumi
    • Journal Title

      IEEE Trans Mag

      Volume: 55 Issue: 3 Pages: 1-5

    • DOI

      10.1109/tmag.2018.2887183

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Tensile Loads on Tethered Actin Filaments Induce Accumulation of Cell Adhesion-Associated Proteins in Vitro.2019

    • Author(s)
      Kiyoshima, D., H. Tatsumi, H. Hirata, and M. Sokabe. 2018
    • Journal Title

      Langmuir

      Volume: 印刷中 Issue: 23 Pages: 7443-7451

    • DOI

      10.1021/acs.langmuir.8b02076

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] アクチン線維に張力を発生させると線維の長軸まわりのねじれは減少する2019

    • Author(s)
      ○Kaoru Okura ( 大蔵 かおる ), Takumi Fukuda ( 福田 拓海 ), Hitoshi Tatsumi ( 辰巳 仁史 )
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 張力センサーとしてのアクチン線維:その揺らぎ解析2018

    • Author(s)
      辰巳仁史
    • Organizer
      生物物理学会年会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Book] 知っておきたい 医工計測技術入門2020

    • Author(s)
      鈴木 良次、辰巳 仁史、宮原 英夫
    • Total Pages
      200
    • Publisher
      朝倉書店
    • ISBN
      9784254335064
    • Related Report
      2020 Annual Research Report 2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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