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formin相同蛋白質Fhosによる微小管-アクチン細胞骨格の動的制御機構

Research Project

Project/Area Number 18790206
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field General medical chemistry
Research InstitutionKyushu University

Principal Investigator

武谷 立  Kyushu University, 生体防御医学研究所, 助教 (50335981)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2007: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2006: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywordsシグナル伝達 / 細胞・組織
Research Abstract

本研究の目的は、formin相同蛋白質Fhos(Fhod)による微小管-アクチン両細胞骨格の動的制御機構の解明であった。Fhodは、分子のほぼ中央にポリプロリンの繰返し構造を持つFH(formin homology)1ドメイン、及びそのC末側に広く保存されたFH2ドメインを持ち、このFH1-FH2領域でアクチンの核化・重合能を有している。Fhodのアクチン重合活性は、N末領域とC末に存在するDAD(dia autoinhibitory domain)との自己分子内結合により普段は抑制されている。我々は、Rho結合キナーゼROCKがFhod1のDAD領域内のSer1131、Ser1137及びThrl141をリン酸化することを見出した。ROCKによるDAD領域内3残基のリン酸化によりFhod1-N末領域とFhod1-DAD間の分子内結合が消失し、これら3残基のリン酸化を模倣した全長変異体Fhod1(S1131D/S1137D/T1141D)は,C末欠失変異体と同様に著明なSF形成を誘導した。さらに血管内皮細胞において、トロンビンなどの血管作動性物質によりRho-ROCK経路を介してFhod1が実際にリン酸化されSF形成を誘導した。また,RNAiによりFhod1をノックダウンするとトロンビンによるSF形成は抑制された。以上より,ROCK依存的なリン酸化によりFhodが活性化されるという新しいformin相同蛋白質の活性化機構を明らかにすると同時に,血管内皮細胞でのSF形成にFhod1が必須の役割を果たすことを明らかにした。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (13 results)

All 2008 2007 2006

All Journal Article (11 results) (of which Peer Reviewed: 3 results) Presentation (2 results)

  • [Journal Article] The mammalian formin FHOD1 is activated through phosphorylation by ROCK and mediates thrombin-induced stress fibre formation in endothelial cells2008

    • Author(s)
      Takeya, R., et. al.
    • Journal Title

      EMBO J. 27

      Pages: 618-628

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction between the SH3 domains and C-terminal Proline-rich region in NADPH oxidase organizer 1(Noxo 1)2007

    • Author(s)
      Yamamoto, A, et. al.
    • Journal Title

      Biochem Biophs Res Commun. 352

      Pages: 560-565

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Full-length p40^<phox> structure suggests a basis for regulation mechanism of its membrane binding.2007

    • Author(s)
      Honbou, K, et. al.
    • Journal Title

      EMBO J. 26

      Pages: 1176-1186

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interaction between the SH3 domains and C-terminal proline-rich region in NADPH oxidase organizer 1 (Noxol).2007

    • Author(s)
      Yamamoto, A., Kami, K., Takeya, R., Sumimoto, H.
    • Journal Title

      Biochem Biophys Res Commun. 352(2)

      Pages: 560-565

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Full-length p40^<phox> structure suggests a basis for regulation mechanism of its membrane binding.2007

    • Author(s)
      Honbou K, Minakami R, Yuzawa S, Takeya R, Suzuki NN, Kamakura S, Sumimoto H, Inagaki F
    • Journal Title

      EMBO J. 26(4)

      Pages: 1176-1186

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Regulation of superoxide-producing NADPH oxidases in nonphagocytic cells.2006

    • Author(s)
      Takeya, R., Ueno, N., Sumimoto, H.
    • Journal Title

      Methods Enzymol. 406

      Pages: 456-468

    • Related Report
      2006 Annual Research Report
  • [Journal Article] NMR solution structure of the tandem SH3 domains of p47^<phox> complexed with a p22^<phox>-derived proline-rich peptide.2006

    • Author(s)
      Ogura, K., Nobuhisa, I., Yuzawa, S., Takeya, R., Torikai, S., Saikawa, K., Sumimoto, H., Inagaki, F.
    • Journal Title

      J. Biol. Chem. 281

      Pages: 3660-3668

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Activation of the superoxide-producing phagocyte NADPH oxidase requires co-operation between the tandem SH3 domains of p47^<phox> in recognition of a polyproline type II helix and an adjacent α-helix of p22^<phox>.2006

    • Author(s)
      Nobuhisa, I., Takeya, R., Ogura, K., Ueno, N., Kohda, D., Inagaki, F., Sumimoto, H.
    • Journal Title

      Biochem. J. 396

      Pages: 183-192

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Regulation of novel superoxide-producing NAD(P)H oxidases.2006

    • Author(s)
      Takeya, R., Sumimoto, H.
    • Journal Title

      Antioxid. Redox Signal. 8

      Pages: 1523-1532

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Direct involvement of the small GTPase Rac in activation of the superoxide- producing NADPH oxidase Noxl.2006

    • Author(s)
      Miyano, K., Ueno, N., Takeya, R., Sumimoto, H.
    • Journal Title

      J. Biol. Chem 81

      Pages: 21857-21868

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Expression and function of Noxolγ, an alternative splicing form of the NADPH oxidase organizer 1.2006

    • Author(s)
      Takeya, R., Taura, M., Yamasaki, T., Naito, S., Sumimoto, H.
    • Journal Title

      FEBS J 273

      Pages: 3663-3677

    • Related Report
      2006 Annual Research Report
  • [Presentation] formin相同蛋白質Fhos1/FHODI のリン酸化による活性制御機構2007

    • Author(s)
      武谷 立, 他
    • Organizer
      第30回日本分子生物学会年会・第80回日本生化学会大会 合同大会
    • Place of Presentation
      横浜
    • Year and Date
      2007-12-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] Phosphorylation-dependent activation of the formin-homology protein Fhos1/FHODI2007

    • Author(s)
      武谷 立, 他
    • Organizer
      第40回日本発生生物学会・第59回日本細胞生物学会合同大会
    • Place of Presentation
      福岡
    • Year and Date
      2007-05-29
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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