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Molecular mechanism of ArfA-mediated ribosome rescue

Research Project

Project/Area Number 16K18684
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Applied biochemistry
Research InstitutionHirosaki University

Principal Investigator

Kurita Daisuke  弘前大学, 農学生命科学部, 准教授 (60552651)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsリボソーム / 翻訳 / タンパク合成 / 蛋白質 / 生体分子 / 核酸
Outline of Final Research Achievements

Here, using cryo-electron microscopy, we characterize the structure of the Escherichia coli 70S ribosome bound with ArfA, RF2, a short non-stop mRNA and a cognate P-site tRNA. The C-terminal loop of ArfA occupies the mRNA entry channel on the 30S subunit, whereas its N terminus is sandwiched between the decoding centre and the switch loop of RF2, leading to marked conformational changes in both the decoding centre and RF2. Despite the distinct conformation of RF2, its conserved catalytic GGQ motif is precisely positioned next to the CCA-end of the P-site tRNA. These data illustrate a stop-codon surrogate mechanism for ArfA in facilitating the termination of non-stop ribosomal complexes by RF2.

Academic Significance and Societal Importance of the Research Achievements

近年、翻訳停滞解消因子は新しい抗生物質の標的として注目されつつある。一般に、翻訳を阻害する抗生物質はリボソームや翻訳関連因子に作用する。翻訳のメカニズムは生物種を問わず共通しているため、このような抗生物質は広範囲のバクテリアに対して効果を示す。しかし、このような広い抗菌スペクトルを示す薬剤は耐性菌の蔓延リスクを高めるという問題を内包している。翻訳停滞解消因子は結核菌・ピロリ菌・赤痢菌・ペスト菌等の一部の病原菌の生育にとって必須であり、その阻害薬は耐性菌出現リスクの低い次世代の抗生物質として期待される。本研究は、このような薬剤開発の基盤となるものである。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (15 results)

All 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Int'l Joint Research] CIC bioGUNE(スペイン)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Max Planck Institute of Biophysics(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] 清華大学(中国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] RsgA couples the maturation state of the 30S ribosomal decoding center to activation of its GTPase pocket.2017

    • Author(s)
      1.Lopez-Alonso JP, Kaminishi T, Kikuchi T, Hirata Y, Iturrioz I, Dhimole N, Schedlbauer A, Hase Y, Goto S, Kurita D, Muto A, Zhou S, Naoe C, Mills DJ, Gil-Carton D, Takemoto C, Himeno H, Fucini P, Connell SR.
    • Journal Title

      Nucleic Acids Research

      Volume: 40 Issue: 11 Pages: 6945-6959

    • DOI

      10.1093/nar/gkx324

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Mechanistic insights into the alternative translation termination by ArfA and RF2.2017

    • Author(s)
      Ma C*, Kurita D*, Li N, Chen Y, Himeno H, Gao N. *co-first author
    • Journal Title

      Nature

      Volume: 541 Issue: 7638 Pages: 550-553

    • DOI

      10.1038/nature20822

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] 細菌におけるリボソームレスキュー機構2016

    • Author(s)
      姫野俵太、栗田大輔
    • Journal Title

      化学と生物

      Volume: 54 Pages: 878-884

    • NAID

      130006772656

    • Related Report
      2016 Research-status Report
  • [Presentation] クライオ電子顕微鏡によるリボソーム・ArfA・RF2複合体の構造解析2018

    • Author(s)
      栗田大輔、Ma C、Gao N、姫野俵太
    • Organizer
      第5回リボソームミーティング
    • Related Report
      2018 Annual Research Report
  • [Presentation] クライオ電子顕微鏡によるリボソーム/ArfA/RF2翻訳停滞複合体の構造解析2018

    • Author(s)
      栗田大輔、Ma C、Gao N、姫野俵太
    • Organizer
      日本農芸化学会 東北・北海道合同支部大会 第153回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] リボソーム/ArfA/RF2複合体のクライオ電子顕微鏡による構造解析2017

    • Author(s)
      栗田大輔、Ma C、Gao N、姫野俵太
    • Organizer
      2017年度生命科学系学会合同年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] クライオ電子顕微鏡によるArfA/RF2/リボソーム複合体の構造解析2017

    • Author(s)
      栗田大輔、Ma C、Gao N、姫野俵太
    • Organizer
      第12回無細胞生命科学研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] ArfAとRF2よる翻訳終結機構の構造基盤2017

    • Author(s)
      栗田大輔、Ma C、Gao N、姫野俵太
    • Organizer
      第19回RNAミーティング
    • Related Report
      2017 Research-status Report
  • [Presentation] リボソーム小サブユニット依存GTPase RsgAの構造解析2017

    • Author(s)
      4.竹本千重、Lopez-Alonso JP、上西達也、菊地岳志、平田侑也、Iturrioz I、Dhimole N、Schedlbauer A、長谷要一、後藤史門、栗田大輔、武藤昱、Zhou S、直枝智恵子、Mills DJ、Gil-Carton D、姫野俵太、Fucini P、Connell SR
    • Organizer
      第19回RNAミーティング
    • Related Report
      2017 Research-status Report
  • [Presentation] ArfA functions as a sensor to recognize the stalled ribosome after RF2 binding.2016

    • Author(s)
      Kurita D, Abo T, Muto A, Himeno H.
    • Organizer
      Ribosome Structure and Function 2016
    • Place of Presentation
      Strasbourg, France
    • Year and Date
      2016-07-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] tmRNA/SmpBによる翻訳停滞リボソームの認識メカニズムの解明2016

    • Author(s)
      栗田大輔、姫野俵太
    • Organizer
      日本生化学会東北支部第82回例会
    • Place of Presentation
      弘前市
    • Year and Date
      2016-05-21
    • Related Report
      2016 Research-status Report
  • [Remarks] 弘前大学農学生命科学部

    • URL

      http://nature.cc.hirosaki-u.ac.jp/2016/12/15/6871

    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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