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Elucidating self-assembly processes based on the development of peptide atomic-resolution imaging

Research Project

Project/Area Number 22K14704
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionThe University of Tokyo

Principal Investigator

Takayuki Nakamuro  東京大学, 総括プロジェクト機構, 特任准教授 (30831276)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordselectron microscopy / peptide / single-molecule / self-assembly / atomic-resolution / ペプチド / 透過電子顕微鏡 / 原子分解能 / 構造解析 / 時間発展 / 自己集合 / 単分子
Outline of Research at the Start

ペプチド凝集挙動の解明は,物理的性質を理解するだけに留まらず創薬設計指針の獲得など基礎から応用研究まで重要とされる.ペプチドは数kDa程度の有機中分子であり,NMRやX線結晶構造解析が分析ツールとして重用されるが,本質的に混合物である凝集体を解析する目的には適さない.一方,単分子観察法としての原子間力顕微鏡(AFM)では,水平方向への分解能の制限により解析することがしばしば困難となる.広く自己組織化現象に対しての知識を進歩させる,新たなイメージング法としてSMART-EMの深化を目指す研究である.

Outline of Final Research Achievements

This report outlines the development and application of Single-Molecule Atomic Resolution Time-Resolved Electron Microscopy (SMART-EM) in the study of molecular dynamics in complex systems. I employed this innovative method to closely analyze the calcium-dependent self-assembly process of Daptomycin, a drug used to treat methicillin-resistant Staphylococcus aureus (MRSA). Additionally, the technique was applied to image N-alkyl peptides (peptoids), revealing that their rigid structures are maintained under vacuum conditions. Our findings suggest that SMART-EM is also applicable to imaging other flexible molecules and other peptides. This methodology opens new avenues for the structural characterization of molecules at the single-molecule level using transmission electron microscopy.

Academic Significance and Societal Importance of the Research Achievements

自己集合現象は広範な科学分野での重要な研究テーマであり,本研究ではペプチド凝集挙動に着目した研究を進めた.ペプチド凝集挙動の解明は,物理的性質を理解するだけに留まらず機能性マテリアルへの合成応用など基礎から応用研究まで重要とされる.原子分解能イメージング法の開発によって単分子から凝集体に対する精緻な構造情報の取得が可能となった.本手法は,分子の剛直性や結合様式の理解を深めるだけでなく,得られた知見を創薬研究へ応用する道を拓くと期待される.

Report

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

    (16 results)

All 2024 2023 2022

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Open Access: 2 results,  Peer Reviewed: 3 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 8 results)

  • [Journal Article] Cinematographic study of stochastic chemical events at atomic resolution2024

    • Author(s)
      Koji Harano, Takayuki Nakamuro, Eiichi Nakamura
    • Journal Title

      Microscopy

      Volume: 73 Issue: 2 Pages: 101-116

    • DOI

      10.1093/jmicro/dfad052

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bottom-up design of peptide nanoshapes in water using oligomers of N-methyl-L/D-alanine2023

    • Author(s)
      Morimoto Jumpei、Shiratori Yota、Yokomine Marin、Ueda Takumi、Nakamuro Takayuki、Takaba Kiyofumi、Maki-Yonekura Saori、Umezawa Koji、Miyanishi Koichiro、Fukuda Yasuhiro、Watanabe Takumu、Mizukami Wataru、Takeuchi Koh、Yonekura Koji、Nakamura Eiichi、Sando Shinsuke
    • Journal Title

      ChemRxiv

      Volume: -

    • DOI

      10.26434/chemrxiv-2023-c4mw6

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Wavy Graphene-Like Network Forming during Pyrolysis of Polyacrylonitrile into Carbon Fiber2023

    • Author(s)
      Toru Ishikawa, Fumihiko Tanaka, Kosuke Kurushima, Akira Yasuhara, Ryusuke Sagawa, Tatsuya Fujita, Ryohei Yonesaki, Katsuhiko Iseki, Takayuki Nakamuro, Koji Harano, Eiichi Nakamura
    • Journal Title

      Journal of the American Chemical Society

      Volume: 145 Issue: 22 Pages: 12244-12254

    • DOI

      10.1021/jacs.3c02504

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Time-Resolved Atomistic Imaging and Statistical Analysis of Daptomycin Oligomers with and without Calcium Ions2022

    • Author(s)
      Nakamuro Takayuki、Kamei Ko、Sun Keyi、Bode Jeffrey W.、Harano Koji、Nakamura Eiichi
    • Journal Title

      Journal of the American Chemical Society

      Volume: 144 Issue: 30 Pages: 13612-13622

    • DOI

      10.1021/jacs.2c03949

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 原子分解能電子顕微鏡による非平衡確率過程の高速映像撮影と定量的解析2024

    • Author(s)
      中室貴幸
    • Organizer
      日本化学会春季年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Atomic-Resolution Analysis of Stochastic Behaviors in Crystallization2024

    • Author(s)
      Takayuki Nakamuro
    • Organizer
      Gordon Research Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Time-resolved TEM for Elucidating Non-equilibrium Molecular Dynamics2023

    • Author(s)
      Takayuki Nakamuro
    • Organizer
      IAMNano2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Molecular Electron Microscopy for Capturing Clusters Non-equilibrium Dynamics2023

    • Author(s)
      Takayuki Nakamuro
    • Organizer
      錯体化学会討論会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ナノワールドの探求:電子顕微鏡が映す分子の世界2023

    • Author(s)
      中室貴幸
    • Organizer
      高校生のための冬休み講座2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ナノ精密合成と分子動態の連続追跡法の融合 映像分子科学の黎明2023

    • Author(s)
      中室貴幸
    • Organizer
      日本化学会第103春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 原子分解能での核形成・結晶成長プロセスのその場観察2023

    • Author(s)
      中室貴幸
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 今まさに結晶ができるところを見る2022

    • Author(s)
      中室貴幸
    • Organizer
      化学への招待-講演会 「分析化学の最前線」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 目で見る科学研究および教育の実践:映像分子化学の黎明2022

    • Author(s)
      中室貴幸
    • Organizer
      錯体化学若手の会夏の学校2022
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Structural Fluctuations of Nanoclusters Captured by Molecular Electron Microscopy2022

    • Author(s)
      Takayuki Nakamuro
    • Organizer
      Atomically Precise Nanochemistry Gordon Research Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子釣り針で探るペプチド自己組織化過程における単分子動態2022

    • Author(s)
      中室貴幸, 亀井恒, Jeffrey W. Bode, 原野幸治, 中村栄一
    • Organizer
      第32回基礎有機化学討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] 分子釣り針で捕捉した深青色発光ペロブスカイト量子ドットの動的原子像2022

    • Author(s)
      中室貴幸, Olivier Chevalier, Rui SHANG, 中村栄一
    • Organizer
      日本顕微鏡学会 第78回学術講演会
    • Related Report
      2022 Research-status Report

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Published: 2022-04-19   Modified: 2025-01-30  

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