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Novel characterization of rare events in dynamic data and its application to biological time series

Research Project

Project/Area Number 16K00059
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Statistical science
Research InstitutionNippon Medical School

Principal Investigator

Fujisaki Hiroshi  日本医科大学, 医学部, 准教授 (60573243)

Co-Investigator(Kenkyū-buntansha) 末谷 大道  大分大学, 理工学部, 教授 (40507167)
Research Collaborator Mitsutake Ayori  
Moritsugu Kei  
Matsunaga Yasuhiro  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords分子動力学シミュレーション / レアイベント / 反応座標 / 多様体学習 / 時系列解析 / 分子シミュレーション / 機械学習 / 主成分分析 / 生体系シミュレーション / ニューラルコンピューティング
Outline of Final Research Achievements

It is a difficult problem to extract rare phenomena called rare events from dynamic data and to characterize them, and similar problems appear when generating data in simulation. When generating a time series of biomolecules by molecular dynamics simulation, structural change between stable states corresponds to a rare event, and the above problem appears. To solve this problem, we here employ a massively parallel computing method called weighted ensemble method. As a specific example, the method was applied to a small protein called chignorin, and it was shown that dynamic structural changes can be efficiently generated. In addition, we could extract reaction coordinates that are important for structural change using the diffusion map method of manifold learning.

Academic Significance and Societal Importance of the Research Achievements

現在は非常に大量のデータが生成・収集され、それを機械学習などの統計的な手法を用いて解析することが標準的になりつつあるが、レアイベントに関しては稀に起こる現象であるためにデータ点が少なく、その生成や収集が難しかった。しかし、本研究で、重み付きアンサンブル法という超並列計算手法を用いることで、レアイベントを生体分子に関しては効率よく生成することは可能であることが示された。また、重み付きアンサンブル法は統計学の粒子フィルター法と似た手法であり、重みのついた軌道のアンサンブルを用いているので、生体分子と関係のない時系列にも適用可能であり、本研究の成果は一般性をもつと言える。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (28 results)

All 2019 2018 2017 2016

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (21 results) (of which Int'l Joint Research: 9 results,  Invited: 7 results)

  • [Journal Article] Conformational change of a biomolecule studied by the weighted ensemble method: Use of the diffusion map method to extract reaction coordinates2018

    • Author(s)
      Fujisaki Hiroshi、Moritsugu Kei、Mitsutake Ayori、Suetani Hiromichi
    • Journal Title

      The Journal of Chemical Physics

      Volume: 149 Issue: 13 Pages: 134112-134112

    • DOI

      10.1063/1.5049420

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exploring Configuration Space and Path Space of Biomolecules Using Enhanced Sampling Techniques?Searching for Mechanism and Kinetics of Biomolecular Functions2018

    • Author(s)
      Fujisaki Hiroshi、Moritsugu Kei、Matsunaga Yasuhiro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 19 Issue: 10 Pages: 3177-3177

    • DOI

      10.3390/ijms19103177

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Energetics and Conformational Pathways of Functional Rotation in the Multidrug Transporter AcrB2018

    • Author(s)
      Y. Matsunaga, T. Yamane, T. Terada, K. Moritsugu, H. Fujisaki, S. Murakami, M. Ikeguchi, A. Kidera
    • Journal Title

      eLife

      Volume: 7 Pages: 1-19

    • DOI

      10.7554/elife.31715

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 生体分子におけるレアイベントサンプリング: Onsager-Machlup 作用を用いた計算手法2017

    • Author(s)
      藤崎弘士
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 2028 Pages: 38-48

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Journal Article] Exploring Rare Events in Biomolecules2017

    • Author(s)
      藤崎弘士
    • Journal Title

      Seibutsu Butsuri

      Volume: 57 Issue: 1 Pages: 040-041

    • DOI

      10.2142/biophys.57.040

    • NAID

      130005296497

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Vibrational energy transport in acetylbenzonitrile described by an ab initio-based quantum tier model2016

    • Author(s)
      H. Fujisaki, K. Yagi, H. Kikuchi, T. Takami, and G. Stock
    • Journal Title

      Chemical physics

      Volume: 482 Pages: 86-92

    • DOI

      10.1016/j.chemphys.2016.09.010

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 統計力学に基づく細胞ダイナミクスの計算手法について2016

    • Author(s)
      藤崎弘士
    • Journal Title

      日本医科大学基礎 科学紀要

      Volume: 45 Pages: 29-50

    • NAID

      40021154986

    • Related Report
      2016 Research-status Report
  • [Presentation] Weighted ensemble simulations of biomolecules: Applications to peptides and proteins2019

    • Author(s)
      Hiroshi Fujisaki
    • Organizer
      APS March Meeting 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Weighted ensemble simulations of biomolecules2018

    • Author(s)
      H. Fujisaki, K. Moritsugu, A. Mitsutake, Y. Matsunaga, H. Suetani
    • Organizer
      11th European Conference on Mathematical and Theoretical Biology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mathematical model for wound healing caused by exogeneous mechanical forces2018

    • Author(s)
      K. Odagiri, H. Fujisaki
    • Organizer
      11th European Conference on Mathematical and Theoretical Biology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Applications of manifold learning techniques to protein dynamics2018

    • Author(s)
      H. Kikuchi, H. Fujisaki
    • Organizer
      56th Annual Meeting of the Biophysical Society of Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] プロリン異性化酵素の重み付きアンサンブル法による計算とその加速2018

    • Author(s)
      藤崎弘士,森次圭,米澤康滋,楯真一
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 溶液中のアセチルベンゾニトリルにおけるエネルギー移動:非平衡MDによる計算2018

    • Author(s)
      菊地浩人,藤崎弘士
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Weighted ensemble simulations of biomolecules2018

    • Author(s)
      Hiroshi Fujisaki
    • Organizer
      56th Annual Meeting of the Biophysical Society of Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 重み付きアンサンブル法によるタンパク質ダイナミクスの計算2018

    • Author(s)
      藤崎弘士
    • Organizer
      大阪大学蛋白質研究所セミナー「生体分子内情報伝達機構の新展開」
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Combining weighted ensemble method with Lyapunov weighted dynamics: Application to proteins2018

    • Author(s)
      H. Fujisaki, K. Moritsugu, Y. Matsunaga, H. Suetani
    • Organizer
      Biophysical Society Meeting 62nd Annual Meeting (San Francisco)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ab initio molecular tier model for quantum vibrational dynamics2017

    • Author(s)
      Hiroshi Fujisaki
    • Organizer
      International workshop on numerical methods and simulations for materials design and strongly correlated quantum matters
    • Place of Presentation
      RIKEN AICS Kobe
    • Year and Date
      2017-03-24
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 生体分子の分子シミュレーショ ンから反応座標をどう抜き出すか?2017

    • Author(s)
      藤崎弘士,末谷大道,光武亜代理
    • Organizer
      日本物理学会第 72 回年次大会
    • Place of Presentation
      大阪大学
    • Year and Date
      2017-03-17
    • Related Report
      2016 Research-status Report
  • [Presentation] Molecular dynamics simulations and dimensional reduction techniques2017

    • Author(s)
      H. Fujisaki
    • Organizer
      Simulations Encounter with Data Science: Data Assimilation, Emulators, Rare Events and Design
    • Place of Presentation
      Tachikawa, Tokyo
    • Year and Date
      2017-03-09
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exploring reaction pathways for peptidylprolyl-isomerase2017

    • Author(s)
      H. Fujisaki, Y. Yonezawa, M. Shiga, L. Maragliano, S. Tate
    • Organizer
      Biophysical Society Meeting 61st Annual Meeting
    • Place of Presentation
      New Orleans
    • Year and Date
      2017-02-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 複雑な分子はどんな道筋を通って、どれくらい速く反応するのか? -生体分子の構造変化とレアイベント-2017

    • Author(s)
      藤崎弘士
    • Organizer
      大分大学 自然科学セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 生体分子の構造変化経路サンプリング2017

    • Author(s)
      藤崎弘士
    • Organizer
      第11回分子シミュレーションスクール--- 基礎から応用まで---
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 重み付きアンサンブル法を用いたタンパク質のパスサンプリング2017

    • Author(s)
      藤崎弘士,森次圭,末谷大道
    • Organizer
      日本物理学会秋季大会(岩手大学)
    • Related Report
      2017 Research-status Report
  • [Presentation] 機械的刺激の効果を考慮した創傷治癒の数理モデル2017

    • Author(s)
      小田切健太、藤崎弘士
    • Organizer
      日本物理学会秋季大会(岩手大学)
    • Related Report
      2017 Research-status Report
  • [Presentation] PIN1 酵素における異性化反応への重み付きアンサンブル法の適用2017

    • Author(s)
      藤崎弘士,森次圭,米澤康滋,楯真一
    • Organizer
      分子シミュレーション討論会(金沢商工会議所)
    • Related Report
      2017 Research-status Report
  • [Presentation] 複雑な分子はどんな道筋でどれくらい速く反応するのか? -生体分子の構 造変化とレアイベント-2016

    • Author(s)
      藤崎弘士
    • Organizer
      高知工科大学「理工学のフロンティア」
    • Place of Presentation
      高知工科大学(高知県香美市)
    • Year and Date
      2016-12-16
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] 生体分子のパスサーチと反応のキネティックス-複雑な道筋の生体ダイナミ クスをどのように計算するか-2016

    • Author(s)
      藤崎弘士
    • Organizer
      第 17 回大つくば物理化学セミナー
    • Place of Presentation
      城西大学 鋸南 セミナーハウス
    • Year and Date
      2016-11-26
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] プロリン異性化酵素の反応経路シミュレーシ ョン2016

    • Author(s)
      藤崎弘士,米澤康滋,志賀基之,楯真一,
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      金沢大学角間キャンパス
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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