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Establishment of a method for identification of ubiquitin ligase substrates in eukaryotic cells by application of bacterial ubiquitin-like modifier Pup

Research Project

Project/Area Number 20K21401
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionUniversity of Miyazaki

Principal Investigator

Nishitoh Hideki  宮崎大学, 医学部, 教授 (00332627)

Project Period (FY) 2020-07-30 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2021: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywordsタンパク質分解 / ユビキチンリガーゼ
Outline of Research at the Start

小胞体不良タンパク質(ERAD基質)は、直鎖化され細胞質に排出された瞬間にUb化される。しかし、哺乳類細胞には少なくともERADユビキチンリガーゼ(E3)として13種類の細胞質局在型が知られており、分解が運命づけられた基質のUb化のためにこれほど多くのE3が進化的に保存されている理由は現時点で不明である。代償性が考えられるが、個体レベルでは、HRD1を含むいくつかのノックアウトマウスは致死性で、ERAD-E3間には基質特異性があると予想される。申請者は、必要性に基づく解析ではなく、細胞内でE3によって実際にUb化されるタンパク質を直接検出する技法が必要であるとの着想に至った。

Outline of Final Research Achievements

Understanding the proteolytic system is an important research issue, as failure of the proteolytic system leads to the accumulation of defective proteins and the development of conformational diseases such as neurodegenerative disorders. The principal investigator has promoted research on proteolysis, which is necessary for quality control of the endoplasmic reticulum. In proteolysis, "Is there specificity in the ubiquitination of defective proteins to be degraded?" If so, what is the law of specificity? If so, what is the law of specificity?" We have developed a novel method to identify ubiquitination substrates to solve these questions.

Academic Significance and Societal Importance of the Research Achievements

本手法の確立によって、小胞体におけるタンパク質分解に関与するユビキチンリガーゼの基質を同定することに成功した。本手法の獲得は、理論上全てのE3に応用可能である。今後は、真核細胞での網羅的解析により、タンパク質分解だけでなく新規シグナル伝達経路の発見にも繋がると期待される。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2021

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results)

  • [Journal Article] ERAD components Derlin-1 and Derlin-2 are essential for postnatal brain development and motor function2021

    • Author(s)
      Sugiyama T, Murao N, Kadowaki H, Takao K, Miyakawa T, Matsushita Y, Katagiri T, Futatsugi A, Shinmyo Y, Kawasaki H, Sakai J, Shiomi K, Nakazato M, Takeda K, Mikoshiba K, Ploegh HL, Ichijo H, Nishitoh H
    • Journal Title

      iScience

      Volume: 24 Issue: 7 Pages: 102758-102758

    • DOI

      10.1016/j.isci.2021.102758

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 褐色脂肪細胞の熱産生とエネルギー代謝2021

    • Author(s)
      西頭英起
    • Journal Title

      臨床免疫・アレルギー科 科学評論社

      Volume: 75 Pages: 226-232

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] ER-resident sensor PERK-mediated regulation of mitochondrial function in brown adipose tissue2021

    • Author(s)
      門脇寿枝、西頭英起
    • Organizer
      第93回日本生化学会大会
    • Related Report
      2020 Research-status Report
    • Invited

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Published: 2020-08-03   Modified: 2023-01-30  

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