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Towards a comprehensive understanding of the amino acid-sensing system that induces activation of TORC1 that controls cell growth

Research Project

Project/Area Number 18K06111
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionOsaka University

Principal Investigator

Araki Yasuhiro  大阪大学, 歯学研究科, 助教 (60345254)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords酵母 / TORC1 / アミノ酸 / 細胞成長 / 栄養増殖 / リン酸化修飾 / リン酸化酵素 / 細胞増殖 / タンパク質 / 出芽酵母
Outline of Final Research Achievements

The function of TORC1 as the critical regulator of growth and metabolism is universally conserved amongst eukaryotes. However, the identification of upstream and downstream factors of TORC1 for cell proliferation and growth remains to be investigated. A combination of biochemical and microscopic approaches demonstrated that an enzyme that catalyzes the first step of the serine synthesis pathway physically interacts with TORC1 and co-localizes with the TORC1 complex in vivo. We also found that TORC1 activity is required to maintain intracellular serine at levels sufficient for growth and that the enzyme is phosphorylated by TORC1 in a manner dependent on the Pib2 pathway. This study revealed that TORC1 directly controls an amino acid synthesis pathway in addition to other macromolecule syntheses.

Academic Significance and Societal Importance of the Research Achievements

二つのTORC1活性化経路の上流に位置するアミノ酸の分類、経路特異的なTORC1の基質の単離といった本研究の成果は、TORC1活性化の分子機構、特に多様なアミノ酸センシング機構の解明の礎になると考える。またTORC1の特異的阻害剤であるラパマイシンは免疫抑制効果、抗がん剤効果、寿命延長効果などの薬理作用があり、様々な疾患の治療薬として用いられているがその副作用が問題となっている。将来的に、本研究はこれら生命現象のメカニズムの理解に留まらず、更なる精緻な治療法の開発の基盤となることが期待される。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (15 results)

All 2021 2020 2019 2018 Other

All Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Remarks (1 results)

  • [Journal Article] Isoflurane induces Art2-Rsp5-dependent endocytosis of Bap2 in yeast.2021

    • Author(s)
      Kozu F, Shirahama-Noda K, Araki Y, Kira S, Niwa H, Noda T
    • Journal Title

      FEBS Open Bio

      Volume: 11 Issue: 11 Pages: 3090-3100

    • DOI

      10.1002/2211-5463.13302

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vacuolar protein Tag1 and Atg1-Atg13 regulate autophagy termination during persistent starvation in S. cerevisiae2021

    • Author(s)
      Shintaro Kira , Masafumi Noguchi , Yasuhiro Araki , Yu Oikawa , Tamotsu Yoshimori , Aiko Miyahara , Takeshi Noda
    • Journal Title

      Journal of Cell Science

      Volume: 134 Issue: 4 Pages: 1-13

    • DOI

      10.1242/jcs.253682

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Starvation-induced autophagy via calcium-dependent TFEB dephosphorylation is suppressed by Shigyakusan2020

    • Author(s)
      Ikari Sumiko、Lu Shiou-Ling、Hao Feike、Imai Kenta、Araki Yasuhiro、Yamamoto Yo-hei、Tsai Chao-Yuan、Nishiyama Yumi、Shitan Nobukazu、Yoshimori Tamotsu、Otomo Takanobu、Noda Takeshi
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 3 Pages: 0230156-0230156

    • DOI

      10.1371/journal.pone.0230156

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 栄養を感知して細胞成長を促すTORC1の制御機構2019

    • Author(s)
      荒木保弘 野田健司
    • Journal Title

      生産と技術

      Volume: 71 Pages: 77-80

    • NAID

      40021969974

    • Related Report
      2019 Research-status Report
  • [Journal Article] Gtr/Ego-independent TORC1 activation is achieved through a glutamine-sensitive interaction with Pib2 on the vacuolar membrane2018

    • Author(s)
      Hirofumi Ukai, Yasuhiro Araki, Shintaro Kira, Yu Oikawa, Alexander I. May, Takeshi Noda
    • Journal Title

      PLOS Genetics

      Volume: April Issue: 10 Pages: 1-1

    • DOI

      10.1016/j.dental.2018.07.002

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 二つのTORC1活性化経路の上流に位置するアミノ酸の同定2021

    • Author(s)
      Qingzhong Zeng、荒木 保弘、野田 健司
    • Organizer
      第 11 回 TOR 研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] TORC1が活性化経路を二つ有する意義2020

    • Author(s)
      荒木保弘
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 二つのTORC1活性化経路を失った酵母変異株からわかったこと2019

    • Author(s)
      荒木 保弘,鈴木清太郎,田中信武,野田 健司
    • Organizer
      第9回TOR研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] TORC1 の液滴形成による活性維持機構2019

    • Author(s)
      荒木 保弘,野田 健司
    • Organizer
      大阪大学蛋白研セミナー/第 3 回 LLPS 研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 細胞内二大分解系を司るTORC1の液滴形成による活性制御2019

    • Author(s)
      荒木 保弘,野田 健司
    • Organizer
      第92回日本生化学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] TORC1はセリン合成経路の促進を介して細胞増殖を司る2018

    • Author(s)
      荒木 保弘, 河村 崚介, 北谷 匠, 澤田 崚平, 野田 健司
    • Organizer
      第8回TOR研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 酵母はいかにして栄養を感知するか2018

    • Author(s)
      荒木保弘
    • Organizer
      第22回酵母合同シンポジウム
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Gtr/Ego-independent TORC1 activation is achieved through a glutamine-sensitive interaction with Pib2 on the vacuolar membrane2018

    • Author(s)
      Araki Y, Ukai H, Kira S, Noda T
    • Organizer
      Nutrient signaling, Cold Spring Habor meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] TORC1 はアミノ酸合成を直接制御する2018

    • Author(s)
      荒木保弘,野田健司
    • Organizer
      第11回オートファジー研究会
    • Related Report
      2018 Research-status Report
  • [Remarks] オートファジー調節の鍵であるアミノ酸の一種 グルタミンが細胞成長を活性化する仕組みの発見

    • URL

      https://resou.osaka-u.ac.jp/ja/tag_view?tag=%E9%87%8E%E7%94%B0%E5%81%A5%E5%8F%B8

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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