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Calorimetric evaluation of the irreversible nucleation process from the reversible oligomers of denatured proteins and its application

Research Project

Project/Area Number 21K05288
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 37020:Chemistry and chemical methodology of biomolecules-related
Research InstitutionNagaoka University of Technology

Principal Investigator

Kidokoro Shun-ichi  長岡技術科学大学, 工学研究科, 教授 (80195320)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords示差走査熱量測定 / 反応エンタルピー / アミロイド線維 / 会合核依存的伸長モデル / 速度定数 / 平衡定数 / グローバル解析 / アミロイド繊維
Outline of Research at the Start

多くの疾病に関連する、人体での蛋白質のアミロイド線維形成は、蛋白質数分子の会合核の形成が律速過程と考えられているが、未だに会合核形成の機構は解明されていない。本研究では、蛋白質の可逆的会合体(RO)から不可逆的な会合核を形成する過程について、示差走査熱量測定を用いて定量的に評価する。本方法を様々な変異体蛋白質や溶媒条件に用いることで、不可逆的会合核形成過程へのアミノ酸残基や溶媒条件の速度論的効果を明確にし、会合核形成を制御するための知見を蓄積する。これによって、アミロイド関連の疾病に対する革新的な治療法や薬剤開発に貢献することをめざす。

Outline of Final Research Achievements

Regarding the mechanism of amyloid fibril formation, which is related to many diseases, we focused on the irreversible process of the assembly nucleation of amyloid fibrils from the reversible assembly of several molecules (RO state) formed by the denatured state of protein molecules, and developed a method of global analysis of DSC data at multiple protein concentrations and temperature scanning rates with a set of equilibrium and kinetic parameters, and applied it to actual data, using a protein in which the RO state appears as a reversible intermediate state of the thermal transition. We also created several amino acid mutants where the stability of RO is designed, and it was shown that increased RO stability leads to enhanced amyloid fibril formation. The new methods have been developed and important knowledge have been accumulated about the relationship between the RO state and amyloid fibril formation.

Academic Significance and Societal Importance of the Research Achievements

蛋白質の変性状態の可逆的な会合体(RO)形成については、多くの蛋白質で平衡論的によって確認されているが、未だ一般的な現象として認知されてはいない。本研究では、ROの安定性制御への分子表面の疎水性残基の役割を更に明確化するとともに、それらがアミロイド線維形成反応にも関与することを明確にしており、蛋白質物性の基礎的な知見としても、また疾病予防や治療につながるアミロイド線維形成を制御するための応用研究につながる知見としても重要と考えられる。また、温度走査熱量測定によって、平衡論的な転移と同時に速度論的な反応を観測する試みは挑戦的であり、様々な他の現象への応用が可能で波及効果が高いと考えられる。

Report

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

    (7 results)

All 2024 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Design and Escherichia coli Expression of a Natively Folded Multi-Disulfide Bonded Influenza H1N1-PR8 Receptor-Binding Domain (RBD)2024

    • Author(s)
      Tu Thao、Rathnayaka Tharangani、Kato Toshiyo、Mizutani Kenji、Saotome Tomonori、Noguchi Keiichi、Kidokoro Shun-ichi、Kuroda Yutaka
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 25 Issue: 7 Pages: 3943-3943

    • DOI

      10.3390/ijms25073943

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reverse Engineering Analysis of the High-Temperature Reversible Oligomerization and Amyloidogenicity of PSD95-PDZ32022

    • Author(s)
      Onchaiya Sawaros、Saotome Tomonori、Mizutani Kenji、Martinez Jose C.、Tame Jeremy R. H.、Kidokoro Shun-ichi、Kuroda Yutaka
    • Journal Title

      Molecules

      Volume: 27 Issue: 9 Pages: 2813-2813

    • DOI

      10.3390/molecules27092813

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Blocking PSD95‐PDZ3's amyloidogenesis through point mutations that inhibit high‐temperature reversible oligomerization (RO)2022

    • Author(s)
      Saotome Tomonori、Onchaiya Sawaros、Brindha Subbaian、Mezaki Taichi、Unzai Satoru、Noguchi Keiichi、Martinez Jose C.、Kidokoro Shun‐ichi、Kuroda Yutaka
    • Journal Title

      The FEBS Journal

      Volume: 2021 Issue: 11 Pages: 1-12

    • DOI

      10.1111/febs.16339

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] DSC Analysis of Reversible Oligomers of Denatured Protein Molecules2021

    • Author(s)
      KIDOKORO Shun-ichi
    • Journal Title

      Seibutsu Butsuri

      Volume: 61 Issue: 6 Pages: 370-373

    • DOI

      10.2142/biophys.61.370

    • NAID

      130008120208

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 分子ビーコンを用いた低温ショック蛋白質・一本鎖核酸間の低濃度での結合平衡解析2024

    • Author(s)
      古賀伊織、加藤優貴、早乙女友規、城所俊一
    • Organizer
      第60回熱測定討論会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] DSC Analysis Methods Considering Reversible Oligomer State of Denatured Protein Molecules2023

    • Author(s)
      Shun-ichi Kidokoro
    • Organizer
      26th IUPAC International Conference on Chemical Thermodynamics
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] PSD95-PDZ3の高温での可逆的なオリゴマー(RO)の一残基置換による阻害を利用したアミロイド線維形成の抑制2021

    • Author(s)
      早乙女 友規、 Sawaros Onchaiya、城所 俊一、黒田 裕
    • Organizer
      第57回熱測定討論会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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