• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of membrane expansion mechanism in autophagosome formation

Research Project

Project/Area Number 19K16071
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Kotani Tetsuya  東京工業大学, 生命理工学院, 特任助教 (10724643)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsオートファジー / 酵母 / オートファゴソーム / 小胞体 / 出芽酵母 / リン酸化
Outline of Research at the Start

オートファジーは「オートファゴソーム」と呼ばれる脂質膜で細胞内物質を包み込み、液胞へと運び、分解する機構である。オートファゴソームは扁平な小さな膜が球状に伸張し閉じることで形成されるが、その伸張機構はほとんどわかっていない。最近、Atg2-Atg18タンパク質複合体はオートファゴソーム前駆体をオートファゴソームの膜の供給源と考えられている小胞体に繋ぎとめることが明らかとなった。本研究では、Atg2-Atg18複合体が小胞体に結合する分子機構を明らかにする。さらに、オートファゴソーム前駆体への脂質供給反応を試験管内で再構成し、オートファゴソーム膜の伸張機構の理解を大きく前進させることを目指す。

Outline of Final Research Achievements

Atg2, which is essential for autophagosome formation, has lipid transfer activity and is thought to supply lipids from the endoplasmic reticulum to the autophagosomal membrane. Atg2 does not always bind to the endoplasmic reticulum, suggesting that it becomes capable of interacting with it only during autophagosome formation. However, the regulatory mechanism of the interaction between Atg2 and the endoplasmic reticulum remains poorly understood. In this study, we obtained results suggesting that Atg2 is phosphorylated during autophagosome formation, which facilitates its interaction with the endoplasmic reticulum.

Academic Significance and Societal Importance of the Research Achievements

これまでにオートファゴソーム形成に必須のタンパク質の個々の機能は明らかとなりつつある。しかし、それらの機能がどのようにして制御されているのか、また、これらタンパク質群がどのように協調的に働いているかなど、まだ多くの疑問が残されており、オートファゴソーム形成の完全なる理解には至っていない。本研究ではオートファゴソーム形成に必須のAtg2の機能制御機構に関する知見を得た。本研究での結果を基に研究を進めることで、オートファゴソーム形成機構のさらなる理解につながると期待できる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Atg39 links and deforms the outer and inner nuclear membranes in selective autophagy of the nucleus2022

    • Author(s)
      Mochida Keisuke、Otani Toshifumi、Katsumata Yuto、Kirisako Hiromi、Kakuta Chika、Kotani Tetsuya、Nakatogawa Hitoshi
    • Journal Title

      Journal of Cell Biology

      Volume: 221 Issue: 2

    • DOI

      10.1083/jcb.202103178

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] TORC1 inactivation stimulates autophagy of nucleoporin and nuclear pore complexes2020

    • Author(s)
      Tomioka Yui、Kotani Tetsuya、Kirisako Hiromi、Oikawa Yu、Kimura Yayoi、Hirano Hisashi、Ohsumi Yoshinori、Nakatogawa Hitoshi
    • Journal Title

      Journal of Cell Biology

      Volume: 219 Issue: 7 Pages: 301-305

    • DOI

      10.1083/jcb.201910063

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Atg9 is a lipid scramblase that mediates autophagosomal membrane expansion2020

    • Author(s)
      Matoba Kazuaki、Kotani Tetsuya、Tsutsumi Akihisa、Tsuji Takuma、Mori Takaharu、Noshiro Daisuke、Sugita Yuji、Nomura Norimichi、Iwata So、Ohsumi Yoshinori、Fujimoto Toyoshi、Nakatogawa Hitoshi、Kikkawa Masahide、Noda Nobuo N.
    • Journal Title

      Nature Structural & Molecular Biology

      Volume: 27 Issue: 12 Pages: 1185-1193

    • DOI

      10.1038/s41594-020-00518-w

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] <i>N</i>-glycosylation of Rim21 at an Unconventional Site Fine-tunes Its Behavior in the Plasma Membrane2020

    • Author(s)
      Obara K, Kotani T, Nakatogawa H, Kihara A, Kamura T
    • Journal Title

      Cell Structure and Function

      Volume: 45 Issue: 1 Pages: 1-8

    • DOI

      10.1247/csf.19021

    • NAID

      130007784461

    • ISSN
      0386-7196, 1347-3700
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] オートファゴソーム膜の供給②:小胞2020

    • Author(s)
      小谷哲也、中戸川仁
    • Journal Title

      週刊「医学のあゆみ」

      Volume: 272 Pages: 725-729

    • Related Report
      2019 Research-status Report
  • [Journal Article] The latest image of the mechanisms of autophagosome formation2019

    • Author(s)
      中戸川 仁、小谷 哲也
    • Journal Title

      生化学

      Volume: 91 Issue: 5 Pages: 602-610

    • DOI

      10.14952/SEIKAGAKU.2019.910602

    • ISSN
      0037-1017
    • Year and Date
      2019-10-25
    • Related Report
      2019 Research-status Report
  • [Presentation] Atg24-Atg20 complex is necessary for sequestration of large components into autophagosome2022

    • Author(s)
      Tetsuya Kotani, Hiromi Kirisako, Chika Kakuta, Yoshinori Ohsumi, Hitoshi Nakatogawa
    • Organizer
      The 10th International Symposium on Autophagy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] オートファゴソーム形成における膜の形態制御2021

    • Author(s)
      小谷哲也 中戸川仁
    • Organizer
      第42回生体膜と薬物の相互作用シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] マイトファジーに必要な隔離膜の形態制御機構2021

    • Author(s)
      小谷哲也 中戸川仁
    • Organizer
      第94回日本生化学会
    • Related Report
      2021 Research-status Report
  • [Presentation] The Atg2-Atg18 complex tethers pre-autophagosomal membranes to the endoplasmic reticulum2019

    • Author(s)
      小谷哲也
    • Organizer
      JSPS A3 Foresight Program The 5th Joint Symposium on Autophagy
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 隔離膜伸張におけるAtg24複合体の役割2019

    • Author(s)
      小谷哲也
    • Organizer
      第12回オートファジー研究会 第1回新学術「マルチモードオートファジー」班会議
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi