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Activation mechanism of coronavirus membrane fusion protein

Research Project

Project/Area Number 20K07519
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49060:Virology-related
Research InstitutionNational Institute of Infectious Diseases

Principal Investigator

Matsuyama Shutoku  国立感染症研究所, ウイルス第三部, 室長 (90373399)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordscoronavirus / コロナウイルス / MHV / 構造変化 / スパイク / S蛋白 / 膜融合
Outline of Research at the Start

エンベロープウイルスはその表面に存在する膜融合蛋白を用いて、ウイルス膜と細胞膜を融合させ、ウイルス遺伝子を細胞内へ送り込む。しかしどうやって膜融合蛋白が膜を融合させているのか、その動作機構は未解明である。コロナウイルスは膜融合蛋白「Spike」の活性化に宿主細胞プロテアーゼを必要とする点において、これまでよく研究されてきたインフルエンザウイルスやレトロウイルスとは異なるため、その特徴を利用した解析法により新たな研究の展開が期待できる。申請者は、生化学的手法で解析することで、構造変化の中間体構造を推測する。

Outline of Final Research Achievements

In envelope virus infections, the molecular mechanism of membrane fusion between viral and cellular membranes is not fully understood. In this study, we experimentally induced the conformational changes of coronavirus fusion protein, spike protein, by incubating the virus with soluble receptor and trypsin. The size of protease digestion products was estimated by Western blot analysis. Based on these biochemical findings, we concluded that the trimer of spike protein adopts an asymmetric-unassembled conformation in the intermediate state, instead of the typical homotrimeric pre-hairpin conformation, followed by the formation of postfusion structure.

Academic Significance and Societal Importance of the Research Achievements

本研究の目的は、ウイルス学分野の未解明問題「膜融合蛋白の活性化機構」を、生化学的手法を用いて解明することである。最近のCryoEMを用いたタンパク質の構造解析により、新しい知見が次々に報告されているが、基本的には安定した構造を解析するための手法であり、ウイルス膜融合蛋白の活性化のような、瞬間的に現れる不安定な構造こそが大きな意味をもつ現象については、肝心なところは何も解析できていないというのが実状である。本研究で用いる、生化学的データから不安定な構造を推測する手法により、より矛盾の少ない構造変化中間体モデルの構築を目指す。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (6 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Use of the particle agglutination/particle agglutination inhibition test for antigenic analysis of SARS‐CoV‐22023

    • Author(s)
      Kobayashi Jun、Matsuyama Shutoku、Shirakura Masayuki、Arita Tomoko、Suzuki Yasushi、Asanuma Hideki、Watanabe Shinji、Hasegawa Hideki、Nakamura Kazuya
    • Journal Title

      Influenza and Other Respiratory Viruses

      Volume: 17 Issue: 2

    • DOI

      10.1111/irv.13093

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Frequent occurrence of mutations in nsp3 and nsp4 of SARS-CoV-2, presumably caused by the inhaled asthma drug ciclesonide2022

    • Author(s)
      Doi Akihiro、Tomita Yuriko、Okura Hiyori、Matsuyama Shutoku
    • Journal Title

      PNAS Nexus

      Volume: 1 Issue: 4

    • DOI

      10.1093/pnasnexus/pgac197

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Anti-Influenza Virus Drug Favipiravir Has Little Effect on Replication of SARS-CoV-2 in Cultured Cells2021

    • Author(s)
      Tomita Yuriko、Takeda Makoto、Matsuyama Shutoku
    • Journal Title

      Antimicrobial Agents and Chemotherapy

      Volume: 65 Issue: 5 Pages: 20-21

    • DOI

      10.1128/aac.00020-21

    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] The physiological TMPRSS2 inhibitor HAI-2 alleviates SARS-CoV-2 infection2021

    • Author(s)
      Tomita Yuriko、Matsuyama Shutoku、Fukuhara Hideo、Maenaka Katsumi、Kataoka Hiroaki、Hashiguchi Takao、Takeda Makoto
    • Journal Title

      Journal of Virology

      Volume: 95 Issue: 12

    • DOI

      10.1128/jvi.00434-21

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Inhaled Steroid Ciclesonide Blocks SARS-CoV-2 RNA Replication by Targeting the Viral Replication-Transcription Complex in Cultured Cells2020

    • Author(s)
      Matsuyama Shutoku、Kawase Miyuki、Nao Naganori、Shirato Kazuya、Ujike Makoto、Kamitani Wataru、Shimojima Masayuki、Fukushi Shuetsu
    • Journal Title

      Journal of Virology

      Volume: 95 Issue: 1

    • DOI

      10.1128/jvi.01648-20

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Patent(Industrial Property Rights)] 微小粒子凝集/凝集抑制反応を用いたSARS-CoV2の力価測定および抗原性状解析法2022

    • Inventor(s)
      小林淳
    • Industrial Property Rights Holder
      松山州徳
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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