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分子モーターSecA ATPaseによるタンパク質膜透過機構の構造機能相関

Publicly Offered Research

Project AreaInnovative nanoscience of supermolecular motor proteins working in biomembranes
Project/Area Number 21023005
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionThe University of Tokyo

Principal Investigator

石谷 隆一郎  The University of Tokyo, 医科学研究所, 准教授 (90361568)

Co-Investigator(Kenkyū-buntansha) 濡木 理  東京大学, 医科学研究所, 教授 (10272460)
塚崎 智也  東京大学, 医科学研究所, 助教 (80436716)
Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 2010: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2009: ¥3,200,000 (Direct Cost: ¥3,200,000)
Keywordsトランスコロン / SecYE / SecDF / X線結晶構造解析 / 膜蛋白質
Research Abstract

タンパク質の膜輸送を促進する膜蛋白質である,高度高熱菌Thermus thermophilus由来SecDFの構造解析を行った.まず,以前得られていた結晶の分解能をさらに向上する為に,結晶化条件の最適化を行った.SecDF全長を大腸菌で発現・界面活性剤により可溶化し,様々な条件で最適化を行ったところ,最終的には,3.5A分解能のデータセット収集に成功した.また,以前決定したペリプラズム領域の高分解能結晶構造とNMR法によって決定した構造を基にSecDF全長の構造精密化を行った.そして最終的に,3.5A分解能で構造解析を完了した.決定した構造からは,ペリプラズムドメインが大きな構造変化を起こすことが示唆された.さらに,プロトン輸送に共役したペリプラズムドメインの構造変化による膜輸送の促進という新たな仮説を提唱した(論文投稿中).現在,更なる機能解析によりこの仮説を実証する研究を遂行中である.

Report

(1 results)
  • 2009 Annual Research Report
  • Research Products

    (9 results)

All 2010 2009 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (1 results) Remarks (1 results)

  • [Journal Article] Structural basis for translational fidelity ensured by transfer RNA lysidine synthetase2009

    • Author(s)
      Nakanishi K, (他3名), Ishitani R, Nureki O
    • Journal Title

      Nature 461

      Pages: 1144-8

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure of a tRNA-dependent kinase essential for selenocysteine decoding2009

    • Author(s)
      Araiso Y, Sherrer RL, Ishitani R, (他2名), Nureki O
    • Journal Title

      Proc Natl Acad Sci USA 106

      Pages: 16215-20

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mg^<2+>-dependent gating of bacterial MgtE channel underlies Mg^<2+> homeostasis2009

    • Author(s)
      Hattori M, (他3名), Tsukazaki T, Ishitani R, (他3名), Nureki O
    • Journal Title

      EMBO J 28

      Pages: 3602-12

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural Basis of Novel Interactions Between the Small-GTPase and GDI-like Domains in Prokaryotic FeoB Iron Transporter2009

    • Author(s)
      Hattori M, (他5名), Ishitani R, Ito K, Nureki O
    • Journal Title

      Structure 17

      Pages: 1345-55

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural basis of AdoMet-dependent aminocarboxypropyl transfer reaction catalyzed by tRNA-wybutosine synthesizing enzyme, TYW22009

    • Author(s)
      Umitsu M, (他3名), Ishitani R, Nureki O
    • Journal Title

      Proc Natl Acad Sci USA 106

      Pages: 15616-21

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Crystal structure of the cytosolic domain of the cation diffusion facilitator family protein2009

    • Author(s)
      Higuchi T, Hattori M, Tanaka Y, Ishitani R, Nureki O
    • Journal Title

      Proteins 76

      Pages: 768-71

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Atomic structure of a folate/FAD-dependent tRNA T54 methyltransferase2009

    • Author(s)
      Nishimasu H, Ishitani R, (他4名), Nureki O
    • Journal Title

      Proc Natl Acad Sci USA 106

      Pages: 8180-5

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] Structural analysis of bacterial Sec translocon machinery2010

    • Author(s)
      Tsukazaki T, (他2名), Ishitani R, (他6名), Nureki O
    • Organizer
      Gordon Research Conference(Protein Transport Across Cell Membranes)
    • Place of Presentation
      米国 テキサス州ヒューストン
    • Year and Date
      2010-03-11
    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.nurekilab.net/

    • Related Report
      2009 Annual Research Report

URL: 

Published: 2009-04-01   Modified: 2018-03-28  

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