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Nano-mechanical Behaviors of Tension-sensoring Proteins

Research Project

Project/Area Number 15K13832
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Materials/Mechanics of materials
Research InstitutionKyoto University

Principal Investigator

Adachi Taiji  京都大学, ウイルス・再生医科学研究所, 教授 (40243323)

Co-Investigator(Kenkyū-buntansha) 井上 康博  京都大学, ウイルス・再生医科学研究所, 准教授 (80442929)
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords張力感受センサー分子 / ナノ構造力学試験 / 原子間力顕微鏡 / ナノバイオメカニクス / αカテニン / ナノ力学試験 / ナノフィッシング / 分子動力学解析
Outline of Final Research Achievements

At adherens junctions, α-catenin is known to act as a tension sensor and accelerate the positive feedback of intercellular tension by recruiting vinculin. In this study, we aimed at elucidating the mechanism how α-catenin retains its activated state while avoiding unfolding under tension. Based on nano-tensile testing using atomic force microscopy, we found that mechanically activated α-catenin fragment exhibited higher mechanical stability than a non-activated one. Through the comparison with mutated and segmented fragments, we found that the key intramolecular interactions within α-catenin act as a conformational switch. We also demonstrated that α-catenin adaptively changes its conformation under tension to a stable intermediate state and settles into a more stable state reinforced by vinculin binding. Our findings suggest that the characteristics of α-catenin enable the functional dynamics of multicellular tissues.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (11 results)

All 2017 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Nano-mechanical characterization of tension-sensitive helix bundles in talin rod2017

    • Author(s)
      Koichiro Maki, Nobuhiko Nakao, Taiji Adachi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 484 Issue: 2 Pages: 372-377

    • DOI

      10.1016/j.bbrc.2017.01.127

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Mechano-adaptive sensory mechanism of α-catenin under tension2016

    • Author(s)
      Koichiro Maki, Sung-Woong Han, Yoshinori Hirano, Shigenobu Yonemura, Toshio Hakoshima & Taiji Adachi
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1 Pages: 24878-24878

    • DOI

      10.1038/srep24878

    • NAID

      120006337976

    • Related Report
      2016 Annual Research Report 2015 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Mechanical, Structural and Functional Dynamics of α-catenin Molecule at Intercellular Adherens Junctions2016

    • Author(s)
      Koichiro Maki, Taiji Adachi
    • Organizer
      第54回日本生物物理学会年会
    • Place of Presentation
      つくば
    • Year and Date
      2016-11-25
    • Related Report
      2016 Annual Research Report
  • [Presentation] Nanofishing and Structural Imaging of Tension-sensor Protein Employing Atomic Force Microscopy2016

    • Author(s)
      Koichiro Maki, Taiji Adachi
    • Organizer
      日本機械学会第27回バイオフロンティア講演会
    • Place of Presentation
      札幌
    • Year and Date
      2016-10-22
    • Related Report
      2016 Annual Research Report
  • [Presentation] Mechano-adaptive Conformational Change of α-catenin to Sense and Transmit Intercellular Force2016

    • Author(s)
      Koichiro Maki, Taiji Adachi
    • Organizer
      European Society of Biomechanics 2016 (ESB2016)
    • Place of Presentation
      Lyon (France)
    • Year and Date
      2016-07-10
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 細胞間張力を感知するαカテニンの力学的分子適応メカニズム2016

    • Author(s)
      牧 功一郎, 安達泰治
    • Organizer
      日本機械学会バイオエンジニアリング部門第28回バイオエンジニアリング講演会
    • Place of Presentation
      東京工業大学(東京都)
    • Year and Date
      2016-01-09
    • Related Report
      2015 Research-status Report
  • [Presentation] Multiscale Modeling and Simulation to Explore the Role of Mechanical Forces that Shape Living Tissues and Organs2015

    • Author(s)
      Taiji Adachi, Yasuhiro Inoue, Yoshitaka Kameo
    • Organizer
      BMB2015: Biochemistry and Molecular Biology
    • Place of Presentation
      Kobe Portopia Hotel (Hyoto・Kobe)
    • Year and Date
      2015-12-01
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Mechanical Roles of Beta-Catenin for AJ-Mediated Force Transmission2015

    • Author(s)
      Koichiro Maki, Sung-Woong Han, Taiji Adachi
    • Organizer
      The 8th Asian-Pacific Confernece on Biomechanics (APBiomech2015)
    • Place of Presentation
      Hokkaido University (Hokkaido・Sapporo)
    • Year and Date
      2015-09-16
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 接着結合における張力伝達分子としてのβカテニン2015

    • Author(s)
      牧功一郎, 韓成雄, 安達泰治
    • Organizer
      第53回日本生物物理学会
    • Place of Presentation
      金沢大学(石川県・金沢市)
    • Year and Date
      2015-09-13
    • Related Report
      2015 Research-status Report
  • [Presentation] 立体構造変化を伴う接着構成分子間のAFM相互作用測定2015

    • Author(s)
      広橋佑紀,牧功一郎,安達泰治
    • Organizer
      日本機械学会2015年度年次大会
    • Place of Presentation
      北海道大学(北海道・札幌市)
    • Year and Date
      2015-09-13
    • Related Report
      2015 Research-status Report
  • [Presentation] Nanomechanical Behaviors of β-Catenin Revealed by Single-Molecule AFM2015

    • Author(s)
      Koichiro Maki, Sung-Woong Han, Taiji Adachi
    • Organizer
      European Society of Biomechanics 2015 (ESB2015)
    • Place of Presentation
      Praque (Czech Republic)
    • Year and Date
      2015-07-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2018-03-22  

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