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2008 Fiscal Year Final Research Report

Simultaneous measurement of intracellular Ca concentration and the structural change of troponin in skeletal muscle.

Research Project

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Project/Area Number 19500358
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Neurophysiology and muscle physiology
Research InstitutionJapan Synchrotron Radiation Research Institute

Principal Investigator

YAGI Naoto  Japan Synchrotron Radiation Research Institute, 利用研究促進部門, 副部門長 (80133940)

Co-Investigator(Kenkyū-buntansha) IWAMOTO Hiroyuki  財団法人高輝度光科学研究センター, 利用研究促進部門・バイオ実験支援チーム, 主幹研究員 (60176568)
Project Period (FY) 2007 – 2008
Keywords筋収縮 / カルシウムイオン / シンクロトロン放射光 / X線回折法 / 生物物理学
Research Abstract

同一のカエル骨格筋標本において、蛍光色素を使った細胞内カルシウム濃度測定と、カルシウム結合収縮制御タンパク質トロポニンのX線回折測定を行う技術を開発した。この結果、電気刺激後のトロポニン反射の強度変化は、細胞内カルシウム濃度から計算したトロポニン分子のカルシウム結合量に遅れて生じることが観察された。このようにトロポニン分子の構造変化は計算から推測されるトロポニンへのカルシウム結合とは必ずしも一致していないことが明らかとなった。

  • Research Products

    (5 results)

All 2009 2008 2007

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (2 results)

  • [Journal Article] Dynamics of Thin-Filament Activation in Rabbit Skeletal Muscle Fibers Examined by Time-Resolved X-ray Diffraction2009

    • Author(s)
      Tamura, T., J. Wakayama, K. Inoue, N. Yagi and H. Iwamoto
    • Journal Title

      Biophys. J 96

      Pages: 1045-1055

    • Peer Reviewed
  • [Journal Article] Structural Changes in the Muscle Thin Filament during Contractions Caused by Single and Double Electrical Pulses2008

    • Author(s)
      Matsuo, T. and Yagi, N
    • Journal Title

      J. Mol.Biol 383

      Pages: 1019-1036

    • Peer Reviewed
  • [Journal Article] Diversity of Structural Behavior in Vertebrate Conventional Myosins Complexed with Actin2007

    • Author(s)
      Iwamoto, H., K. Oiwa, M. Kovacs, J. R. Sellers, T. Suzuki, J. Wakayama, T. Tamura, N. Yagi and T. Fujisawa
    • Journal Title

      J. Mol. Biol. 369

      Pages: 249-264

    • Peer Reviewed
  • [Presentation] Measurements of structural changes of troponin molecules caused by crossbridge formation in live frog muscle during contraction2008

    • Author(s)
      T. Matsuo and N. Yagi
    • Organizer
      日本生物物理学会
    • Place of Presentation
      福岡
    • Year and Date
      2008-12-04
  • [Presentation] Measurement of Ca-induced structural changes of the thin filament in intact frog skeletal muscle2008

    • Author(s)
      N. Yagi
    • Organizer
      日本生理学会
    • Place of Presentation
      東京
    • Year and Date
      2008-03-25

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Published: 2010-06-10   Modified: 2016-04-21  

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