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Elucidation of the proteasome activity by shuttle factors

Research Project

Project/Area Number 18K14913
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 47030:Pharmaceutical hygiene and biochemistry-related
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

TSUCHIYA Hikaru  公益財団法人東京都医学総合研究所, 生体分子先端研究分野, 主任研究員 (90760132)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsタンパク質分解 / 蛋白質分解
Outline of Final Research Achievements

The proteasome is a major proteolytic machine that regulates cellular proteostasis through selective degradation of ubiquitylated proteins. Recently, we and other group showed that the ubiquitin-selective chaperone p97 and Ub-binding proteins RAD23 and UBQLNs play critical roles in the substrate-selection and sorting to the proteasome. In this study, we reveal that proteasome-containing nuclear foci form under acute hyperosmotic stress. The proteasome foci exhibited properties of liquid droplets. RAD23B, a substrate-shuttling factor for the proteasome, and ubiquitylated proteins were necessary for formation of proteasome foci.

Academic Significance and Societal Importance of the Research Achievements

これまで、プロテアソームがユビキチン化基質を直接認識し分解すると考えられてきた。このためプロテアソーム自身の活性制御機構については十分に解析が進んでいない。よってシャトル分子制御によるプロテアソーム制御機構を解明する本研究はユビキチン・プロテアソーム系の基本的な作動機構について新規の提案をする研究であり学術的に新規性の高いものである。また、ユビキチン・プロテアソーム系の機能破綻はがんや自己免疫疾患、神経変性疾患など様々な疾患を引き起こすと考えられている。よって本研究によるシャトル分子を介したプロテアソーム依存的分解制御機構の解明は、将来の治療薬開発のための分子基盤となることが期待される。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 1 results) Remarks (3 results)

  • [Journal Article] Stress- and ubiquitylation-dependent phase separation of the proteasome2020

    • Author(s)
      Yasuda Sayaka、Tsuchiya Hikaru、Kaiho Ai、Guo Qiang、Ikeuchi Ken、Endo Akinori、Arai Naoko、Ohtake Fumiaki、Murata Shigeo、Inada Toshifumi、Baumeister Wolfgang、Fernandez-Busnadiego Ruben、Tanaka Keiji、Saeki Yasushi
    • Journal Title

      Nature

      Volume: 578 Issue: 7794 Pages: 296-300

    • DOI

      10.1038/s41586-020-1982-9

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural insights into ubiquitin recognition and Ufd1 interaction of Npl42019

    • Author(s)
      Sato Yusuke、Tsuchiya Hikaru、Yamagata Atsushi、Okatsu Kei、Tanaka Keiji、Saeki Yasushi、Fukai Shuya
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 5708-5708

    • DOI

      10.1038/s41467-019-13697-y

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Methods to measure ubiquitin chain length and linkage.2019

    • Author(s)
      Ohtake, F., Tsuchiya, H., Tanaka, K., and Saeki, Y.
    • Journal Title

      Methods Enzymol

      Volume: 618 Pages: 105-133

    • DOI

      10.1016/bs.mie.2018.12.019

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of ubiquitination activity and identification of ubiquitinated substrates using TR-TUBE2019

    • Author(s)
      Yoshida, Y., Saeki, Y., Tsuchiya, H., and Tanaka, K.
    • Journal Title

      Methods Enzymol

      Volume: 618 Pages: 135-147

    • DOI

      10.1016/bs.mie.2018.12.032

    • ISBN
      9780128163597
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ストレス依存的なプロテアソーム液-液相分離2019

    • Author(s)
      土屋 光
    • Organizer
      第4回 LLPS研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Stress and ubiquitylation-dependent phase separation of the proteasome2019

    • Author(s)
      Tsuchiya, H
    • Organizer
      EMBO Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ユビキチン鎖長決定法の開発2018

    • Author(s)
      土屋 光、新井 直子、海保 愛、田中 啓二、佐伯 泰
    • Organizer
      第91回 日本生化学会大会
    • Related Report
      2018 Research-status Report
  • [Remarks] 液-液相分離が担う核内タンパク質分解機構の発見

    • URL

      http://www.igakuken.or.jp/topics/2020/0205.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 不要なタンパク質が分解を受ける前に解きほぐされる仕組み

    • URL

      http://www.igakuken.or.jp/topics/2019/1213.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 東京都医学総合研究所HP

    • URL

      http://www.igakuken.or.jp/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2021-02-19  

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