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Genome physics: Principles of organization and dynamics of genome chromatin

Research Project

Project/Area Number 19H01860
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
Research InstitutionNagoya University

Principal Investigator

Sasai Masaki  名古屋大学, 工学研究科, 教授 (30178628)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2019: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsゲノム立体構造 / シミュレーション / クロマチン / 相分離 / ダイナミクス
Outline of Research at the Start

ゲノムは抽象的な1次元配列ではなく、3次元空間でダイナミックに動きながら構造をつくる物理的実体であり、その特性を理解することは細胞の理解と制御にとって重要な課題である。本研究では、ゲノムDNAの立体構造形成メカニズムを解明するため、機械学習、分子動力学計算、統計力学理論を組み合わせた新しい計算理論を開発して、ゲノムDNAの運動と細胞機能の相関など、細胞の理解と制御にとって本質的な問題の解析に適用する。

Outline of Final Research Achievements

Based on the new analysis of the physical properties of chromatin, we developed the first computational method to quantitatively simulate the three-dimensional (3D) structure and movement of the whole genome of human cells. The analysis showed that the heterogeneous repulsive interactions among chromatin regions bring about the phase separation of chromatin, forming the whole-genome 3D structure. We calculated the responses of cells to various perturbations, including inhibition of the transcription activity. With the cooperation of the experimental group investigating the single-cell chromatin dynamics, we showed the intrinsic relationship between chromatin dynamics and transcription activity.

Academic Significance and Societal Importance of the Research Achievements

ゲノム立体構造は、DNA情報の読み取りや複製に大きな影響を与えるため、計算シミュレーションによる解明が待たれていた。本研究では、クロマチンの物理的性質が染色体の中で不均一であることに注目し、クロマチンの不均一な運動によって生じる相分離がゲノム立体構造を形成する駆動力であることを示した。本研究で開発した計算法は、多くの実験データを統一的に説明すると同時に、ゲノム立体構造のダイナミックな揺らぎを予測するものである。この計算法は、ゲノム立体構造解析の新しい方法として、細胞制御機構への理解に向けて重要な貢献をすると期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (38 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (5 results) Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Open Access: 5 results,  Peer Reviewed: 5 results) Presentation (23 results) (of which Int'l Joint Research: 7 results,  Invited: 7 results) Book (2 results)

  • [Int'l Joint Research] ニューヨーク州立大学(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ニューヨーク州立大学(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] 浙江工科大学(中国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] ニューヨーク州立大学(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 浙江工科大学(中国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Generation of dynamic three-dimensional genome structure through phase separation of chromatin2021

    • Author(s)
      Shin Fujishiro and Masaki Sasai
    • Journal Title

      bioRxiv

      Volume: 該当なし Pages: 1-23

    • DOI

      10.1101/2021.05.06.443035

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Role of the reaction-structure coupling in temperature compensation of the KaiABC circadian rhythm2021

    • Author(s)
      Sasai Masaki
    • Journal Title

      bioRxiv

      Volume: 該当無し Pages: 1-19

    • DOI

      10.1101/2021.10.11.464015

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] Mechanism of autonomous synchronization of the circadian KaiABC rhythm2021

    • Author(s)
      Sasai Masaki
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 1-12

    • DOI

      10.1038/s41598-021-84008-z

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Stochastic epigenetic dynamics of gene switching2020

    • Author(s)
      Bhattacharyya Bhaswati、Wang Jin、Sasai Masaki
    • Journal Title

      Physical Review E

      Volume: 102 Issue: 4 Pages: 1-9

    • DOI

      10.1103/physreve.102.042408

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quantitative analysis of spatial distributions of all tRNA genes in budding yeast2020

    • Author(s)
      Tokuda N
    • Journal Title

      Biophysical Journal

      Volume: 118 Issue: 9 Pages: 2181-2192

    • DOI

      10.1016/j.bpj.2019.12.029

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heterogeneous fluid-like movements of chromatin and their implications to transcription2020

    • Author(s)
      Ashwin SS, Maeshima K, Sasai M
    • Journal Title

      Biophysical Reviews

      Volume: 12 Issue: 2 Pages: 461-468

    • DOI

      10.1007/s12551-020-00675-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Probability Landscape of Coupled Epigenetic and Genetic Network with Eddy-Like Probability Currents2020

    • Author(s)
      Bhattacharyya B, Sasai M
    • Journal Title

      Biophysical Journal

      Volume: 118 Issue: 3 Pages: 285a-286a

    • DOI

      10.1016/j.bpj.2019.11.1626

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Organization of fast and slow chromatin revealed by single-nucleosome dynamics.2019

    • Author(s)
      Ashwin, S.S., Nozaki, T., Maeshima, K., Sasai, M.
    • Journal Title

      Proc Natl Acad Sci USA

      Volume: 116 Issue: 40 Pages: 19939-19944

    • DOI

      10.1073/pnas.1907342116

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] The role of dynamic cohesin looping in chromatin compaction and phase separation2022

    • Author(s)
      Shin Fujishiro and Masaki Sasai
    • Organizer
      The 30th Hot Spring Harbor International Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] エッジ距離を用いた遺伝子制御ネットワークの解析2022

    • Author(s)
      堀池由朗、藤城新、笹井理生
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高密度ソフトコア系の平均場ポテンシャルヘシアンと混合自由エネルギー2022

    • Author(s)
      藤城新、笹井理生
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] クロマチン相分離による動的なゲノム構造形成2021

    • Author(s)
      藤城新、笹井理生
    • Organizer
      第1回 ゲノム生物物理学セミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 拡散的ループ形成によるクロマチン相分離2021

    • Author(s)
      藤城新、笹井理生
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Boolean modeling and state analysis of gene regulatory networks2021

    • Author(s)
      堀池由朗、藤城新、笹井理生
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] KaiABC振動における温度補償性1分子レベルのフィードバックループ2021

    • Author(s)
      笹井理生
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Effects of epigenetic modifications on the intermediate states of epithelial-mesenchymal transitions2021

    • Author(s)
      萩原剣一、笹井理生
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] カメレオンモデルによるアデニル酸キナーゼの構造転移の研究2021

    • Author(s)
      吉田樹生、笹井理生、寺田智樹
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Free energy landscape analysis of conformational transition of NtrC by chameleon model2021

    • Author(s)
      永田大晴、笹井理生、寺田智樹
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 4Dゲノムアーキテクチュア:細胞核のなかのポリマー凝縮系2021

    • Author(s)
      藤城 新, 笹井 理生
    • Organizer
      日本化学会 第101春季年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] A minimal model to understanding heterogeneous dynamics in live cell2021

    • Author(s)
      S.S. Ashwin, Ryosuke Nagashima, Kazuhiro Maeshima, Masaki Sasai
    • Organizer
      RIKEN BDR Symposium 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Stochastic dynamics of transcription and chromatin movement2020

    • Author(s)
      Masaki Sasai
    • Organizer
      Statistical Biological Physics: From single molecule to cell
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 3D genome organization through entropy-driven phase separation of chromatin2020

    • Author(s)
      藤城 新, 笹井 理生
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Model construction of chromatin structure formation and RNA transport near the nuclear membrane2020

    • Author(s)
      今井 望, 藤城 新, 笹井 理生
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Entropic phase separation of chromatin domains to form chromosome compartments2020

    • Author(s)
      藤城 新, 笹井 理生
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] A landscape-based view on the stepping movement of myosin VI2020

    • Author(s)
      T. P. Terada, Q.-M. Nie, M. Sasai
    • Organizer
      The Biophysical Society Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Probability landscape of coupled epigenetic and genetic network with eddy-like probability currents2020

    • Author(s)
      B. Bhattacharyya, M. Sasai
    • Organizer
      The Biophysical Society Annual Meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] How Chemical Free Energy is Used for Synchronization2019

    • Author(s)
      M. Sasai
    • Organizer
      14th Asia-Pacific Physics Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A landscape-based view on the stepping movement of myosin VI2019

    • Author(s)
      T. P. Terada, Q.-M. Nie, M. Sasai
    • Organizer
      Joint 12th EBSA, 10th ICBP-IUPAP Biophysics Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 染色体脱凝縮シミュレーションによるヒト間期核組織化の理解2019

    • Author(s)
      藤城新、笹井理生
    • Organizer
      第1回クロマチン潜在能ワークショップ
    • Related Report
      2019 Annual Research Report
  • [Presentation] クロマチン構造とRNA輸送経路が協調して形成される過程2019

    • Author(s)
      今井望、藤城新、笹井理生
    • Organizer
      第1回クロマチン潜在能ワークショップ
    • Related Report
      2019 Annual Research Report
  • [Presentation] Organization of interphase human nucleus via simulated chromosome decondensation2019

    • Author(s)
      S. Fujishiro, M. Sasai
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Annual Research Report
  • [Book] 物理科学,この1年 20222022

    • Author(s)
      パリティ編集委員会、分担執筆
    • Total Pages
      204
    • Publisher
      丸善出版
    • ISBN
      9784621306864
    • Related Report
      2021 Annual Research Report
  • [Book] 物理科学, この1年(分担執筆)2020

    • Author(s)
      笹井理生
    • Total Pages
      4
    • Publisher
      丸善出版
    • ISBN
      9784621304860
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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