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Theoretical study of autophagy dynamics

Research Project

Project/Area Number 18K14693
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44010:Cell biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Sakai Yuji  東京大学, 大学院医学系研究科(医学部), 助教 (70631779)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsオートファジー / 膜リモデリング / オルガネラ / 理論生物学 / 定量生物学 / ソフトマター物理学 / 膜物理学 / 生物物理学 / 数理生物学 / 曲率因子 / イメージング / 膜物理 / 形の相転移 / 相分離 / 細胞生物 / 数理生物 / ソフトマター物理
Outline of Final Research Achievements

Autophagy is an intracellular degradation process that is mediated by de novo formation of autophagosomes. Autophagosome formation involves dynamic morphological changes; a disk-shaped membrane cisterna grows, bends to become a cup-shaped structure, and finally develops into a spherical autophagosome. We have constructed a theoretical model that integrates the membrane morphological change and entropic partitioning of putative curvature generators, which we have used to investigate the autophagosome formation process quantitatively. We show that the feedback effects between the membrane curvature and the distribution of the curvature generators stabilize disk- and cup-shaped intermediate structures during autophagosome formation, which is quantitatively consistent with in vivo observations. Our model provides a framework for understanding autophagosome formation.

Academic Significance and Societal Importance of the Research Achievements

オートファジー研究は、今まで生化学や遺伝学など実験を主導として行われてきた。しかし、その機構についてはまだ未解決な問題が多くある。本研究では、物理モデル、すなわち膜の形に基づくエネルギーを考慮する数理解析から、オートファゴソームの形態変化を理解することを試みた。本研究を通して、オートファジー分野に対して理論的取り組みの有効性を示すことができた。オートファジー分野における理論研究の可能性を示し、実験と理論の融合により新たな知見を得ることができた。

Report

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

    (11 results)

All 2019 2018 Other

All Int'l Joint Research (1 results) Presentation (10 results) (of which Int'l Joint Research: 7 results)

  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Presentation] Theoretical modeling for autophagosome formation2019

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Roland L. Knorr, Noboru Mizushima
    • Organizer
      EMBO Workshop: Membrane shaping and remodeling by proteins
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theoretical modeling for autophagosome formation2019

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Roland L. Knorr, Noboru Mizushima
    • Organizer
      China-Japan-Korea Symposium on Autophagy
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling autophagosome formation2019

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Roland L. Knorr, Noboru Mizushima
    • Organizer
      Joint 12th EBSA / 10th ICBP-IUPAP Biophysics Congress
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Modeling morphological change during autophagosome formation2019

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Roland L. Knorr, Noboru Mizushima
    • Organizer
      EMBO Workshop: Autophagy: From molecular principles to human diseases
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Theoretical modeling for autophagosome formation2019

    • Author(s)
      境祐二,本田-小山郁子, 立川正志, Roland Knorr, 水島昇
    • Organizer
      第19回東京大学生命科学シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] オートファゴソーム形成の理論モデル2019

    • Author(s)
      境祐二,本田-小山郁子, 立川正志, Roland Knorr, 水島昇
    • Organizer
      第12回オートファジー研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Physical modeling for autophagosome formation2018

    • Author(s)
      境祐二
    • Organizer
      細胞システムの動態と論理X
    • Related Report
      2018 Research-status Report
  • [Presentation] Mathematical modelling for autophagosome formation2018

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Noboru Mizushima
    • Organizer
      2018 Annual Meeting of the Society for Mathematical Biology & the Japanese Society for Mathematical Biology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Physical Modeling for autophagosome formation2018

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Noboru Mizushima
    • Organizer
      Physics of living matter
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Model of autophagosome formation regulated by curvature-generators2018

    • Author(s)
      Yuji Sakai, Ikuko Koyama-Honda, Masashi Tachikawa, Noboru Mizushima
    • Organizer
      Advances in Physics of Emergent orders in Fluctuations 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2021-02-19  

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