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Molecular mechanisms to detect and resolve abnormal translation

Research Project

Project/Area Number 22H00401
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Inada Toshifumi  東京大学, 医科学研究所, 教授 (40242812)

Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥42,510,000 (Direct Cost: ¥32,700,000、Indirect Cost: ¥9,810,000)
Fiscal Year 2024: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2023: ¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2022: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
KeywordsRQC / 衝突リボソーム / 高速AMF / 小胞体ストレス応答 / リボソームユビキチン化 / クライオ電子顕微鏡 / 統合ストレス応答 (ISR) / リボトキシックストレス応答 (RSR) / 異常翻訳 / 翻訳品質管理RQC / RQT複合体 / ISR / RSR / CATテール付加 / 翻訳品質管理 / 異常タンパク質分解 / 非典型翻訳反応 / 機能欠損リボソームを分解する品質管理機構 / 脱ユビキチン化酵素 / リボソーム衝突 / タンパク質恒常性 / 翻訳品質管理機構 / 異常翻訳解消 / ストレス応答 / タンパク質恒常性維持
Outline of Research at the Start

正確な遺伝子発現は生命現象の根幹であり、その破綻や異常は様々な疾患の原因となる。細胞の保持する品質管理機構は、遺伝子発現の異常を解消し、恒常性を維持する。研究代表者は、異常翻訳を認識し解消する翻訳品質管理機構RQCの分子基盤とタンパク質恒常性維持機能を解明した。本研究では、異常翻訳の感知応答システムとその生理機能の解明を目指して、①異常翻訳の実体②異常翻訳を感知し細胞応答を誘導するシステム③異常翻訳の解消機構の解明、について解明を進める。本研究により、新たなストレス応答シグナルの分子実体が解明され、タンパク質恒常性維持機構の理解が大きく進むことが期待される。

Outline of Final Research Achievements

Various stresses and specific sequences cause abnormal translation termination at the elongation stage. The translation quality control mechanism that recognizes translation abnormalities and maintains protein homeostasis is essential for maintaining protein homeostasis, but the overall picture is still unclear. The quality control mechanism for abnormal translation termination, RQC (Ribosome-associated Quality Control), is highly conserved up to higher eukaryotes, and in particular, the addition of specific tag sequences and the degradation mechanism of abnormal proteins are common to prokaryotes. In this study, we analyzed 1) the nature of abnormal translation due to various stresses, 2) the system that detects abnormal translation and induces a cellular response, and 3) the mechanism for resolving abnormal translation and its physiological function.

Academic Significance and Societal Importance of the Research Achievements

以下の研究成果は、いずれも学術的意義の高い研究であるだけでなく、新たな治療法や創薬への応用が期待される。主要な翻訳品質管理機構であるRQCが、異常翻訳の実体である衝突リボソームを認識し解消する分子機構を世界で初めて解明し、センサー因子が衝突リボソームの特異的構造を認識し解消する一連の反応を生化学的に再構成し、クライオ電子顕微鏡により構造を決定し、高速原子間力顕微鏡でリアルタイム1分子観察を行った。リボソームユビキチン化に起因する新規翻訳制御機構の発見、統合ストレス応答の主要なキナーゼであるGCN2とリボソームの複合体の構造決定と機能解析。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Comments on the Screening Results   Annual Research Report
  • Research Products

    (22 results)

All 2025 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (14 results) (of which Int'l Joint Research: 9 results,  Invited: 3 results)

  • [Int'l Joint Research] University of Munich(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] rucial roles of Grr1 in splicing and translation of HAC1 mRNA upon unfolded stress response.2025

    • Author(s)
      Sato, N., Nakano, Y., Matsuki, Y., Tomomatsu, S., Li, S., Matsuo. Y., Inada, T.
    • Journal Title

      Nat Commun.

      Volume: 16 Issue: 1 Pages: 21721-14

    • DOI

      10.1038/s41467-025-57360-1

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The UFM1 system: Working principles, cellular functions, and pathophysiology2024

    • Author(s)
      Komatsu Masaaki、Inada Toshifumi、Noda Nobuo N.
    • Journal Title

      Molecular Cell

      Volume: 84 Issue: 1 Pages: 156-169

    • DOI

      10.1016/j.molcel.2023.11.034

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanistic insights into the roles of the UFM1 E3 ligase complex in ufmylation and ribosome-associated protein quality control2023

    • Author(s)
      Ishimura Ryosuke、Ito Sota、Mao Gaoxin、Komatsu-Hirota Satoko、Inada Toshifumi、Noda Nobuo N.、Komatsu Masaaki
    • Journal Title

      Science Advances

      Volume: 9 Issue: 33

    • DOI

      10.1126/sciadv.adh3635

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural basis for clearing of ribosome collisions by the RQT complex2023

    • Author(s)
      Best Katharina、Ikeuchi Ken、Kater Lukas、Best Daniel、Musial Joanna、Matsuo Yoshitaka、Berninghausen Otto、Becker Thomas、Inada Toshifumi、Beckmann Roland
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 921-921

    • DOI

      10.1038/s41467-023-36230-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Molecular basis of eIF5A-dependent CAT tailing in eukaryotic ribosome-associated quality control2023

    • Author(s)
      Tesina Petr、Ebine Shuhei、Buschauer Robert、Thoms Matthias、Matsuo Yoshitaka、Inada Toshifumi、Beckmann Roland
    • Journal Title

      Molecular Cell

      Volume: 83 Issue: 4 Pages: 607-621.e4

    • DOI

      10.1016/j.molcel.2023.01.020

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Decoding of the ubiquitin code for clearance of colliding ribosomes by the RQT complex2023

    • Author(s)
      Matsuo Yoshitaka、Uchihashi Takayuki、Inada Toshifumi
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 79-79

    • DOI

      10.1038/s41467-022-35608-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two modes of Cue2-mediated mRNA cleavage with distinct substrate recognition initiate no-go decay2022

    • Author(s)
      Tomomatsu Shota、Watanabe Atsuya、Tesina Petr、Hashimoto Satoshi、Ikeuchi Ken、Li Sihan、Matsuo Yoshitaka、Beckmann Roland、Inada Toshifumi
    • Journal Title

      Nucleic Acids Research

      Volume: 51 Issue: 1 Pages: 253-270

    • DOI

      10.1093/nar/gkac1172

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Mechanistic Bases for Sensing Aberrant Translation and Quality Controls2024

    • Author(s)
      稲田利文
    • Organizer
      Molecular stress control from bacteria to humans
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 内在性mRNAの安定性と翻訳制御におけるリボソーム動態制御機構の機能2024

    • Author(s)
      稲田利文
    • Organizer
      日本核酸医薬学会第9回年会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Molecular mechanisms of translation quality controls to rescue ribosome stalling and collision2024

    • Author(s)
      稲田利文
    • Organizer
      International Conference of the Korean Society of Molecular and Cellular Biology (KSMCB) 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ribosome dynamics determines the stability and abundance of the ribosomal subunits2024

    • Author(s)
      稲田利文
    • Organizer
      Ribosome meeting 2024 in Japan
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ribosome dynamics and turnover: A branching pathway regulated by stalling and collisions2024

    • Author(s)
      LI SIHAN
    • Organizer
      Ribosome meeting 2024 in Japan
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mechanistic insights of UFM1 E3 ligase complex in ufmylation and ribosome-associated protein quality control2024

    • Author(s)
      伊藤壮太
    • Organizer
      Ribosome meeting 2024 in Japan
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Elucidation of the molecular mechanism for ribosomal protein eS7A ubiquitination that contributes to Unfolded Protein Response2024

    • Author(s)
      佐藤二千翔
    • Organizer
      東京大学生命科学シンポジウム
    • Related Report
      2024 Annual Research Report
  • [Presentation] Elucidation of the molecular mechanism for ribosomal protein eS7A ubiquitination that contributes to Unfolded Protein Response2024

    • Author(s)
      佐藤二千翔
    • Organizer
      第25回 日本RNA学会年会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Grr1-mediated Ubp3 degradation is crucial for HAC1 mRNA translation and unfolded stress response in yeast2024

    • Author(s)
      佐藤二千翔
    • Organizer
      Ribosome meeting 2024 in Japan
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ribosome stalling induces uS3 ubiquitination and stress responses-mediated regulation of ribosomal subunit abundance.2024

    • Author(s)
      Alexander Landis
    • Organizer
      Ribosome meeting 2024 in Japan
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ubiquitin code for helicase-driven clearance of colliding ribosomes by the RQT complex2023

    • Author(s)
      稲田利文
    • Organizer
      RNA meets protein decay
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The Molecular function of Cue2 and Mbf in No-go Decay2023

    • Author(s)
      友松翔太
    • Organizer
      28th Annual Meeting of the RNA Society
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ubp3 degradation by Grr1 increases eS7A ubiquitination and promotes HAC1i translation under ER stress conditions2023

    • Author(s)
      佐藤二千翔
    • Organizer
      第24回 日本RNA学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 小胞体ストレス条件下、Grr1はUbp3の分解を介してeS7Aのユビキチン化を上昇させ、HAC1iの翻訳促進に寄与する2023

    • Author(s)
      佐藤二千翔
    • Organizer
      第46回 日本分子生物学会年会
    • Related Report
      2023 Annual Research Report

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Published: 2022-04-19   Modified: 2026-01-16  

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