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Elucidation of the amyloid formation mechanism of cytochrome c using the laser trapping method

Research Project

Project/Area Number 18K19146
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 37:Biomolecular chemistry and related fields
Research InstitutionNara Institute of Science and Technology

Principal Investigator

Hirota Shun  奈良先端科学技術大学院大学, 先端科学技術研究科, 教授 (90283457)

Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsタンパク質 / レーザートラッピング法 / 光圧 / アミロイド線維 / ドメインスワッピング / ジスルフィド結合 / シトクロムc / レーザートラッピング / タンパク質凝集体 / タンパク質変性
Outline of Final Research Achievements

Proteins often function by forming a specific three-dimensional structure, but in Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis, etc., proteins that are specific to these diseases are structurally denatured and accumulate as amyloid fibrils in living tissues. Since it is difficult to spatially and temporally control amyloid fibril formation of proteins, the details of the mechanism of amyloid fibril formation remain unknown. In this study, we used cytochrome c as a model protein. We introduced a cysteine residue at various positions of cytochrome c and made disulfide-linked cytochrome c dimers whose structural flexibility was controlled. We captured the dimers in solution by laser trapping and investigated the formation of amyloid fibrils.

Academic Significance and Societal Importance of the Research Achievements

生体内でのアミロイド線維の形成は多くの疾患と密接に関連しており、アミロイド線維形成機構の解明は生命科学の基礎研究の最重要課題の一つである。しかし、アミロイド線維の形成を空間的および時間的に制御する方法がないため、アミロイド線維形成機構の詳細は依然不明のままである。本研究では、シトクロムcのアミロイド線維形成にレーザートラッピングを利用することにより、アミロイド線維形成に関する新しい知見が得られ、これらの知見はタンパク質の構造変性と関連のある疾病の理解に役立つ。また、本手法はタンパク質立体構造研究に有用な手法であることが示された。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (18 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (14 results) (of which Int'l Joint Research: 6 results,  Invited: 12 results)

  • [Int'l Joint Research] National Yang Ming Chiao Tung University(台湾)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] National Chiao Tung University(台湾)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] National Chiao Tung University(台湾)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Oligomerization of Cytochrome c, Myoglobin, and Related Heme Proteins by 3D Domain Swapping2019

    • Author(s)
      Shun Hirota
    • Journal Title

      Journal of Inorganic Biochemistry

      Volume: 194 Pages: 170-179

    • DOI

      10.1016/j.jinorgbio.2019.03.002

    • NAID

      120006763862

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 光圧によるアミロイド線維の人工作製2021

    • Author(s)
      杉山輝樹、廣田俊、藤原正裕、藤田咲子、大野智子
    • Organizer
      文部科学省ナノテクノロジープラットフォーム 令和2年度「秀でた利用成果」発表会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 3Dドメインスワッピングによる金属タンパク質の超分子創成2020

    • Author(s)
      廣田俊
    • Organizer
      錯体化学会オンライン研究会「錯体化学に基づく分子の構造変換設計と機能制御」
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 光圧によるアミロイド線維の人工作製2020

    • Author(s)
      杉山輝樹、廣田俊、藤原正裕、藤田咲子、大野智子
    • Organizer
      文部科学省ナノテクノロジープラットフォーム 令和2年度利用成果発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 金属タンパク質:反応機構解明と超分子創製2020

    • Author(s)
      廣田俊
    • Organizer
      フロンティア生命化学研究会 特別シンポジウム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 光圧によるアミロイド線維の人工作製2020

    • Author(s)
      杉山輝樹、廣田俊、藤原正裕、藤田咲子、大野智子
    • Organizer
      第20回国際ナノテクノロジー総合展・技術会議
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Fabrication of Amyloid Fibrils of Cytochrome c Disulfide Dimers by Optical Trapping2020

    • Author(s)
      ChunLiang Chiu, PeiHua Lo, ChiehJu Chang, Hongxu Yang, Shun Hirota, Hiroshi Masuhara, Teruki Sugiyama
    • Organizer
      The 67th Japan Society of Applied Physics Spring Meeting 2020
    • Related Report
      2019 Research-status Report
  • [Presentation] Reaction Mechanism Elucidation and Supramolecular Creation of Metalloproteins2020

    • Author(s)
      Shun Hirota
    • Organizer
      The 100th Chemical Society of Japan Annual Meeting (中止)
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Oligomerization of Cytochrome c, Myoglobin, and Related Heme Proteins by 3D Domain Swapping2019

    • Author(s)
      Shun Hirota
    • Organizer
      19th International Conference on Biological Inorganic Chemistry (ICBIC19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Constructing Heme Protein Supramolecules by 3D Domain Swapping2019

    • Author(s)
      Shun Hirota
    • Organizer
      2nd International Conference on Bioinformatics, Biotechnology, and Biomedical Engineering (BioMIC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Oligomerization of Heme Proteins by 3D Domain Swapping2019

    • Author(s)
      Shun Hirota
    • Organizer
      The 6th National Conference on Biophysical Chemistry (NCBPC-6)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Supramolecular Assemblies of c-Type Cytochromes Based on 3D Domain Swapping2018

    • Author(s)
      Shun Hirota
    • Organizer
      233rd ECS Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of Protein Supramolecules by 3D Domain Swapping2018

    • Author(s)
      Shun Hirota
    • Organizer
      The 18th Annual Meeting of the Protein Science Society of Japan (Workshop: 35th Anniversary of Protein Engineering since 1983)
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Domain Swapping-Based Assemblies of c-Type Cytochromes2018

    • Author(s)
      Shun Hirota, Satoshi Nagao, Masaru Yamanaka, Yoshiki Higuchi
    • Organizer
      Tenth International Conference on Porphyrins and Phthalocyanines (ICPP-10)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Vibrational Spectroscopic Studies of Cytochrome c and Hydrogenase2018

    • Author(s)
      廣田俊、太虎林、樋口芳樹、柳澤幸子、小倉尚志
    • Organizer
      第56回日本生物物理学会年会(シンポジウム:ピコバイオロジーが目指すもの)
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-07-25   Modified: 2024-01-30  

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