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Elucidation of sensing mechanism of lipid asymmetry and establishment of bases for its application

Research Project

Project/Area Number 16K07288
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Functional biochemistry
Research InstitutionNagoya University (2017-2019)
Hokkaido University (2016)

Principal Investigator

Obara Keisuke  名古屋大学, 理学研究科, 助教 (30419858)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords脂質非対称 / 細胞膜 / 出芽酵母 / バイオセンサー / 真菌感染症 / ストレス応答 / 酵母 / タンパク質分解 / センサー / 脂質 / センシング / Rim101
Outline of Final Research Achievements

In this study, we focused on Rim21, the sensor protein for altered lipid asymmetry in the plasma membrane. We suggested that Rim21 senses alterations in lipid asymmetry through interaction between lipid asymmetry sensor motifs in Rim21 and acidic lipids in the plasma membrane. We also elucidated the function of N-glycosylation of Rim21.
A biosensor that can report the state of lipid asymmetry in living yeast cells was developed in this study. Moreover, we succeeded in improving the S/N ratio of this prototype biosensor by mutagenesis approach.
Rim21 invokes a signal transduction pathway called the Rim101 pathway, and this pathway is a good potential drug target. We revealed that activation of this pathway is regulated by antagonistic action of ubiquitination and deubiquitination. In addition, we elucidated the mechanism and the biological significance of attenuation of the Rim101 pathway.

Academic Significance and Societal Importance of the Research Achievements

本研究で行ったRim21による脂質非対称感知機構に関する提案は、タンパク質と脂質の相互作用に関する新たなパラダイムと成り得る。
本研究で開発した脂質非対称バイオセンサーは、生きた細胞での脂質非対称変化の追跡という、これまで不可能であったアプローチを可能とする。今後、動植物細胞で利用可能なバイオセンサーの開発などを通して、脂質非対称研究のボトルネックであった生細胞でのリアルタイム解析を達成し、分野の発展に大きく貢献する可能性がある。
本研究で明らかにしたRim101経路の不活性化機構は、真菌感染症の創薬に寄与する知見となる。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (14 results)

All 2020 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [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 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Loop 5 region is important for the activity of the long-chain base transporter Rsb1.2017

    • Author(s)
      Makuta H, Obara K, Kihara A
    • Journal Title

      Journal of Biochemistry

      Volume: VOL 161 Pages: 207-213

    • DOI

      10.1093/jb/mvw059

    • NAID

      120006401452

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The Rim101 pathway contributes to ER stress adaptation through sensing the state of plasma membrane.2017

    • Author(s)
      Obara K, Kihara A
    • Journal Title

      Biochemical Journal

      Volume: VOL 474 Issue: 1 Pages: 51-63

    • DOI

      10.1042/bcj20160580

    • NAID

      120006374981

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 脂質非対称性の感知機構から見えてきた細胞膜の新たな役割2020

    • Author(s)
      小原圭介
    • Organizer
      第72回日本生物工学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of a biosensor for the plasma membrane lipid asymmetry.2019

    • Author(s)
      Obara K, Yasuda A and Kamura T
    • Organizer
      29th International Conference on Yeast Genetics and Molecular Biology (ICYGMB)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 細胞外刺激と細胞膜脂質非対称の関係性の解析2019

    • Author(s)
      安田有那、小原圭介、嘉村巧
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 細胞膜脂質非対称バイオセンサーの開発2019

    • Author(s)
      小原圭介、安田有那、嘉村巧
    • Organizer
      第19回日本蛋白質学会年会・第71回日本細胞生物学会大会 合同年次大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ユビキチン化を介した細胞膜脂質非対称シグナリング2019

    • Author(s)
      小原圭介、嘉村巧
    • Organizer
      第2回ユビキチン研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 細胞膜脂質非対称バイオセンサーの開発2019

    • Author(s)
      小原圭介、安田 有那、嘉村巧
    • Organizer
      第71回日本細胞生物学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 細胞膜脂質非対称バイオセンサー開発の試み2018

    • Author(s)
      安田有那、小原圭介、嘉村巧
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 細胞膜脂質非対称センサーが細胞内外のストレスを感知する仕組み2017

    • Author(s)
      小原 圭介
    • Organizer
      日本遺伝学会第89回大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 細胞膜脂質非対称の感知機構と細胞応答の解明2017

    • Author(s)
      小原 圭介
    • Organizer
      2017年度生命科学系学会合同年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 細胞膜脂質非対称センシング機構と細胞応答2016

    • Author(s)
      小原 圭介、西野 佳菜子、内堀 健矢、山内 佐織、木原 章雄
    • Organizer
      第89回日本生化学会大会
    • Place of Presentation
      東北大学(宮城県仙台市)
    • Year and Date
      2016-09-25
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Sensing mechanism of alterations in plasma membrane lipid asymmetry and external alkalization.2016

    • Author(s)
      Obara K, Nishino K, Kihara A
    • Organizer
      14th International Congress on Yeasts (ICY14)
    • Place of Presentation
      淡路夢舞台国際会議場(兵庫県淡路市)
    • Year and Date
      2016-09-11
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2021-02-19  

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