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Flexible Regions in Myosin Head and the Energy Transduction in Muscle Contraction

Research Project

Project/Area Number 05454617
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Structural biochemistry
Research InstitutionAsahikawa Medical College

Principal Investigator

HIRATUSKA Toshiaki  Asahikawa Medical College, Chemistry Associate Professor, 医学部, 助教授 (30041825)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1994: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1993: ¥5,200,000 (Direct Cost: ¥5,200,000)
KeywordsMuscle Contraction / Myosin Head / Flexible Regions / Energy Transduction
Research Abstract

The fluorescent labeling reagent 4-fluoro-7-sulfamoylbenzofurazan (ABDF) specifically labeled Cys-707 (SH1) of myosin subfragment-1 (S-1) . The hydrophobic fluorescent dye 3- [4- (3-phenyl-2-pyrazolin-1-y1) benzene-1-sulfonylamido] phenylboronic acid (PPBA) atoichiometrically bound to the ATP-binding pocket of S-1. These two fluorophores were useful as sensitive probes to examine the flexible regions of S-1. The data suggested a movement of SH1 associated with ATP hydrolysis. Furthermore, the experiments with PPBA clearly demonstrated that the ATP-binding pocket of S-1 assumes a tightened conformational state during ATP hydrolysis. Thus these two flexible regions are responsible for the energy transduction system in muscle contraction.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Toshiaki Hiratsuka: "Behavior of Cys-707(SHI)in Myosin Associated with ATP Hydrolysis Revealed with a Fluorescent Probe Linked Directly to the Sulfur Atom" Journal of Biological Chemistry. 268. 24742-24750 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 平塚,寿章: "筋収縮モータータンパク質ミオシン-構造・機能関連の新展開-" 病態生理. 13. 731-739 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 平塚,寿章: "生物活性物質にランプをつける。" 現代化学. 283. 20-25 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshiaki Hiratsuka: "Nucleotide-Induced Closure of the ATP-binding Pocket in Myosin Subfragment-1" Journal of Biological Chemistry. 269. 27251-27257 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 平塚,寿章: "螢光標識生物活性物質-ライフサイエンス研究への新展開" 蛋白質・核酸・酵素. 39. 2322-2334 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 平塚,寿章: "ミオシンのATP結合ポケットの構造変化と筋収縮" 生理物理. 34(印刷中). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshiaki Hiratsuka: "Behavior or Cys-707 (SH1) in Myosin Associated with ATP Hydrolysis Revealed with a Fluorescent Probe Linked Directly to the Sulfur Atom" J.Biol.Chem.268 (33). 24742-24750 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshiaki Hiratsuka: "Nucleotide-Induced Closure of the ATP-binding Pocket in Myosin Subfragment-1" J.Biol.Chem.269 (44). 27251-27257 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Toshiaki Hiratsuka: "Behavior of Cys-707(SH1)in Myosin Associated with ATP Hydrolysis Revealed with a Fluorescent Probe Linked Directly to the Sulfur Atom" Journal of Biological Chemistry. 268. 24742-24750 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] 平塚寿章: "筋収縮モータータンパク質ミオシン -構造・機能関連の新展開-" 病態生理. 13. 731-739 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 平塚寿章: "生物活性物質にランプをつける" 現代化学. 283. 20-25 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshiaki Hiratsuka: "Nucleotide-Induced Closure of the ATP-binding Pocket in Myosin Subfragment-1" Journal of Biological Chemistry. 269. 27251-27257 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 平塚寿章: "螢光標識生物活性物質 -ライフサイエンス研究への新展開-" 蛋白質・核酸・酵素. 39. 2322-2334 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 平塚寿章: "ミオシンのATP結合ポケットの構造変化と筋収縮" 生物物理. 34(印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Toshiaki Hiratsuka: "Behavior of Cys-707(SH1) in Myosin Associated with ATP Hydrolysis Revealed with a Fluorescent Probe Linked Directly to the Sulfur Atom" Journal of Biological Chemistry. 268. 24742-24750 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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