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Elucidation of driving forces underlying protein folding coupled with ligand binding.

Research Project

Project/Area Number 20K06578
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionNagoya University

Principal Investigator

Kosuke Maki  名古屋大学, 理学研究科, 准教授 (30361570)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords蛋白質 / フォールディング / 複合体 / スタフィロコッカル・ヌクレアーゼ / リガンド結合 / スタフィロコッカル・ヌクレアーぜ / 蛋白質複合体 / 構造形成 / 速度論
Outline of Research at the Start

蛋白質が他の蛋白質や低分子リガンドと結合することによって複合体をつくるとき、構造変化を伴うことが多い。低分子リガンド結合を伴う折れ畳みでは、反応においてリガンド結合と折れ畳みのどちらが先に起こるのかに着目して研究がなされてきた。しかし、現実の系では、リガンド結合するにつれて折れ畳みが起こる、その逆など、互いに影響を及ぼし合いながら反応が進むことが予想される。反応を引き起こすしくみから考えはじめ、反応の物理的な機構を明らかにし、反応の様子を描く新たな方法を探索する。

Outline of Final Research Achievements

By regulating solution conditions, we have shown that addition of a specific ligand, protein folding can be induced. We applied the method to the folding of a model protein, staphylococal nuclease (SNase). A series of spectroscopic probs including NMR were used to follow the folding reaction. In addition to those methods, replica-permutation molecular dynamics simulation and a statistical mechanical model were used to characterize the structural properties and energetics of the relevant species. Furthermore, we exploited a chemically modified ligand to investigate roles of each phosphorylation groups of the ligand.

Academic Significance and Societal Importance of the Research Achievements

蛋白質が構造変化を伴い複合体を形成する際に、リガンド結合と構造変化が起こる順序を調べた。広い範囲にわたる実験・計算機シミュレーションによる結果を踏まえて、モデル計算に基づいて、リガンド濃度に依存して反応経路が変化していくことが明らかになった。蛋白質複合体形成は神経変性疾患などと深い関連があることから、本研究の結果は蛋白質科学のみならず医学にも貢献し得るものである。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (4 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (5 results)

  • [Int'l Joint Research] Fox Chase Cancer Center(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Fox Chase Cancer Center(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Fox Chase Cancer Center(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Fox Chase Cancer Center(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Folding of staphylococcal nuclease induced by binding of chemically modified substrate analogs sheds light on mechanisms of coupled folding/binding reactions2023

    • Author(s)
      Yujiro Mori, Takuya Mizukami, Saho Segawa, Heinrich Roder, and Kosuke Maki
    • Journal Title

      Biochemistry

      Volume: - Issue: 11 Pages: 1670-1678

    • DOI

      10.1021/acs.biochem.3c00094

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Energetics and kinetics of substrate analog-coupled staphylococcal nuclease folding revealed by a statistical mechanical approach.2020

    • Author(s)
      Mizukami T, Furuzawa S, Itoh SG, Segawa S, Ikura T, Ihara K, Okumura H, Roder H, Maki K
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America

      Volume: 117 Issue: 33 Pages: 19953-19962

    • DOI

      10.1073/pnas.1914349117

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Inducing simple and short-termed phosphorylation oscillation by using a phosphorylation site variant of clock protein KaiC2023

    • Author(s)
      Yuji Nishimura, Rie Kumagai, Yuto Iura, Kosuke Maki
    • Organizer
      第61回日本生物物理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] スタフィロコッカル・ヌクレアーゼにおける、自発的フォールディングからリガンド誘導フォー ルディングへの機構転移2022

    • Author(s)
      Yujiro Mori, Issei Suzuki, Shingo Fukazawa, Kosuke Maki
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 反応順序の切り替えを利用したリガンドによる蛋白質フォールディング機構の原子団レベルでの解析2021

    • Author(s)
      森祐二郎, 水上琢也, 瀬川紗帆, 槇亙介
    • Organizer
      日本物理学会第76回年次大会(2021年)
    • Related Report
      2020 Research-status Report
  • [Presentation] 反応順序の切り替えを利用したリガンドによるフォールディング機構の原子団レベルでの解析2021

    • Author(s)
      森祐二郎, 水上琢也, 瀬川紗帆, 槇亙介 (森祐二郎が最優秀発表賞を受賞)
    • Organizer
      令和2年度生物物理学会中部支部講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Similarity and difference between substrate analogue-induced and spontaneous folding of staphylococcal nuclease2020

    • Author(s)
      Yujiro Mori, Saho Segawa, Kosuke Maki
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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