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Mechanisms of selective Golgi-vacuole/lysosome trafficking pathway

Research Project

Project/Area Number 21K06160
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Jin Natsuko  国立研究開発法人理化学研究所, 光量子工学研究センター, 研究員 (90827362)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsゴルジ体 / 液胞 / 膜交通 / ライブセルイメージング / 選択的輸送 / リソソーム / 出芽酵母 / オルガネラ品質管理
Outline of Research at the Start

真核生物において、ゴルジ体は必須細胞内小器官(オルガネラ)であり、その機能維持は生命活動を支える上で重要な役割を持つ。出芽酵母を用いた予備研究から、ゴルジ体上での膜交通異常により活性化される「ゴルジ体ー液胞間輸送経路」の存在が想定された。本研究課題では、その分子機構の解明を目指すと共に、この「ゴルジ体ー液胞間輸送経路」と「ゴルジ体恒常性維持、品質管理」との関係性について検証を行う。

Outline of Final Research Achievements

In all eukaryotic cells, intracellular membrane trafficking is an essential process. There is an anterograde trafficking flow for transport of newly synthesized proteins from endoplasmic reticulum (ER) to their final destination through Golgi apparatus. On the other hand, retrograde trafficking flow is required for protein retrieval from Golgi to ER and intra-Golgi protein transport. I found that an unknown machinery is triggered to transport several and selective Golgi resident proteins into vacuole/lysosome for degradation, when the retrograde flow is inhibited. The studies in this proposal are aimed at understanding the molecular mechanisms and a biological significance for this degradation process. Based on the classification of target Golgi proteins, the boundary to selective vacuolar trafficking is thought to reside in the trans-Golgi. In addition, I developed a yeast RUSH assay to analyze how the target Golgi-residents are sorted to the vacuole.

Academic Significance and Societal Importance of the Research Achievements

本研究により、新規合成タンパク質輸送とは異なる「選択的ゴルジ体ー液胞間輸送経路」の存在が示唆された。また、酵母RUSH法の構築及び高速超解像ライブセルイメージングと組み合わせることにより、これまで酵母研究では困難であった積荷輸送の全容を詳細にライブセルイメージングにより追跡することが可能となった。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 2022 Other

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

  • [Journal Article] Spatiotemporal dissection of the Golgi apparatus and the ER-Golgi intermediate compartment in budding yeast2024

    • Author(s)
      Tojima Takuro、Suda Yasuyuki、Jin Natsuko、Kurokawa Kazuo、Nakano Akihiko
    • Journal Title

      eLife

      Volume: 13

    • DOI

      10.7554/elife.92900

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The TMEM192-mKeima probe specifically assays lysophagy and reveals its initial steps2023

    • Author(s)
      Shima Takayuki、Ogura Monami、Matsuda Ruriko、Nakamura Shuhei、Jin Natsuko、Yoshimori Tamotsu、Kuma Akiko
    • Journal Title

      Journal of Cell Biology

      Volume: 222 Issue: 12

    • DOI

      10.1083/jcb.202204048

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bur1 functions with TORC1 for vacuole‐mediated cell cycle progression2022

    • Author(s)
      Jin Yui、Jin Natsuko、Oikawa Yu、Benyair Ron、Koizumi Michiko、Wilson Thomas E、Ohsumi Yoshinori、Weisman Lois S
    • Journal Title

      EMBO reports

      Volume: 23(4) Issue: 4

    • DOI

      10.15252/embr.202153477

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 超解像ライブセルイメージングにより見えてきた、 オルガネラ間タンパク質輸送の実態2024

    • Author(s)
      神 奈亜子
    • Organizer
      酵母研究会第93回講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 膜交通のダイナミクスに迫る、酵母RUSH法の開発とライブセルイメージングへの応用2023

    • Author(s)
      神 奈亜子、黒川 量雄、戸島 拓郎、須田恭之、中野 明彦
    • Organizer
      酵母遺伝学フォーラム第56回研究報告会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超解像ライブセルイメージングによるオルガネラ間膜接着を介した新規積荷輸送機構の解明2023

    • Author(s)
      神 奈亜子、黒川 量雄、中野 明彦
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Vacuoles/lysosomes are newly generated from endosomes2023

    • Author(s)
      神 唯、小泉美智子、神奈亜子、Lois Weisman、中野明彦、大隅良典
    • Organizer
      Gordon Research Conference Molecular Membrane Biology
    • Related Report
      2023 Annual Research Report
  • [Presentation] Vacuoles/lysosomes are newly generated from endosomes2023

    • Author(s)
      神 唯、小泉美智子、神奈亜子、Lois Weisman、中野明彦、大隅良典
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Bur1 functions with TORC1 for vacuole-mediated cell cycle progression2022

    • Author(s)
      神 唯、小泉美智子、神奈亜子、Lois Weisman、大隅良典
    • Organizer
      第45回 日本分子生物学会年会(招待講演)(国際学会)
    • Related Report
      2022 Research-status Report
  • [Remarks] 生細胞超解像イメージング研究チーム

    • URL

      http://sclim.riken.jp/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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