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Detection of protein-protein interactions in vivo

Research Project

Project/Area Number 18K14393
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 38030:Applied biochemistry-related
Research InstitutionKyoto Sangyo University

Principal Investigator

ITO Shinya  京都産業大学, 総合生命科学部, 研究助教 (00794439)

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: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsタンパク質間相互作用 / 線維化疾患 / Hsp47 / コラーゲン / PPI阻害剤
Outline of Final Research Achievements

Molecular chaperones perform pivotal roles in proteostasis by engaging in protein-protein interactions (PPIs). The collagen-specific molecular chaperone heat shock protein 47 (Hsp47) interacts with procollagen in the endoplasmic reticulum (ER) and plays crucial roles in collagen synthesis. PPIs between Hsp47 and collagen could offer a therapeutic target for fibrosis, which is characterized by abnormal collagen accumulation in the extracellular matrix of fibrotic organs. Herein, we established a bioluminescence resonance energy transfer (BRET) system for assessing Hsp47-collagen interaction dynamics within the ER. We propose that the method developed can provide valuable information on PPIs between Hsp47 and collagen and on the effects of PPI inhibitors important for the management of fibrotic disorders.

Academic Significance and Societal Importance of the Research Achievements

我々が同定したHsp47阻害低分子化合物が小胞体内でコラーゲンとHsp47の相互作用を阻害すること、これまでHsp47はコラーゲン3重らせん構造上のアルギニンを認識していると考えられてきたが、アルギニンがない位置のコラーゲン3重らせん構造にも弱いながら結合していること、Hsp47はSerpinファミリーに属し、特徴的なループ領域を持つが、そのSerpinループもコラーゲンとの相互作用に寄与していること、が分かった。これらのことは、分子シャペロンHsp47とコラーゲンの相互作用について新たな知見を与えるとともに、この系の阻害剤探索への有用性を示した。

Report

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

    (5 results)

All 2019 2018

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

  • [Journal Article] A BRET-based assay reveals collagen-Hsp47 interaction dynamics in the endoplasmic reticulum and small-molecule inhibition of this interaction.2019

    • Author(s)
      S. Ito, M. Saito, M. Yoshida, K. Takeuchi, T. Doi & K. Nagata
    • Journal Title

      J Biol Chem.

      Volume: 294(44) Issue: 44 Pages: 15962-15972

    • DOI

      10.1074/jbc.ra119.010567

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 細胞におけるコラーゲンとその特異的分子シャペロンHsp47の相互作用の解析2019

    • Author(s)
      伊藤進也 永田和宏
    • Organizer
      第42回日本分子生物学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] コラーゲン特異的分子シャペロンHsp47の機能制御2018

    • Author(s)
      伊藤進也、永田和宏
    • Organizer
      第13回小胞体ストレス研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] Collagen-specific molecular chaperone Hsp47 would be a therapeutic target for fibrotic diseases2018

    • Author(s)
      Shinya Ito, Kazuhiro Nagata
    • Organizer
      19th Congress of International Society for Biomedical Research on Alcoholism
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 小胞体内におけるコラーゲンとその特異的分子シャペロン間の相互作用の検出と阻害2018

    • Author(s)
      伊藤進也、永田和宏
    • Organizer
      第18回日本蛋白質科学会年会
    • Related Report
      2018 Research-status Report

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

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