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Elucidation of Chaperone and Enzyme-like Mechanisms on Membrane Protein Integration by a Glycolipid MPIase

Research Project

Project/Area Number 18K06143
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 InstitutionSuntory Foundation for Life Sciences

Principal Investigator

Miura Kaoru  公益財団法人サントリー生命科学財団, 生物有機科学研究所・構造生命科学研究部, 主席研究員 (90353515)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords膜挿入促進因子 / MPIase / 固体NMR / 膜脂質 / ピロリン酸 / 分子間相互作用 / 膜挿入抑制 / PISEMA法 / 膜配向角度 / 膜挿入因子 / 膜挿入抑制因子 / DAG / 固体NMR / 膜蛋白質膜挿入 / Sec非依存過程 / 糖脂質 / NMR
Outline of Final Research Achievements

Proper membrane integration is indispensable for nascent membrane proteins that emerge from the ribosomal tunnel to correctly functionalize in the membrane. In this study, we revealed how membrane lipids, including a membrane protein integrase, MPIase, regulate the protein integration using solid-state NMR and fluorescence measurements. Membrane integration has strong correlations with the membrane physicochemical properties. Cone-shaped molecules decreased the fluidity inside the membrane and inhibited the membrane integration. In contrast, MPIase possessing an inverted cone-shaped structure showed the opposite effects on the membrane properties and restored the integration. The electrostatic intermolecular interaction between MPIase and the substrate protein also affected the integration. The unique molecular structure of MPIase supports the membrane integration of proteins by a variety of approaches.

Academic Significance and Societal Importance of the Research Achievements

新生蛋白質の膜挿入には、Secトランスロコンを必要とする経路と非依存経路があり、後者においては膜蛋白質は自発的に挿入すると考えられてきたが、最近大腸菌内膜では糖脂質MPIaseが両経路において必須の因子であることがわかってきた。しかし、MPIaseがどのように「挿入酵素様」の作用を示すのか、その詳細は明らかになっていない。本研究は、種々の物理化学的な手法を用いて、非依存経路のモデル系における糖脂質MPIaseの作用機構を理解しようとするものであり、Secトランスロコン依存性挿入の機構の初期段階を理解する上で大きな手掛かりとなることが期待できる。

Report

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

    (7 results)

All 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (3 results) Remarks (1 results)

  • [Journal Article] Novel Glycolipid Involved in Membrane Protein Integration: Structure and Mode of Action2019

    • Author(s)
      Fujikawa, K.; Nomura, K.; Nishiyama, K. I.; Shimamoto, K.
    • Journal Title

      Journal of Synthetic Organic Chemistry, Japan

      Volume: 77 Issue: 11 Pages: 1096-1105

    • DOI

      10.5059/yukigoseikyokaishi.77.1096

    • NAID

      130007742536

    • ISSN
      0037-9980, 1883-6526
    • Year and Date
      2019-11-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Alteration of membrane physicochemical properties by two factors for membrane protein integration2019

    • Author(s)
      Nomura K, Yamaguchi T, Mori S, Fujikawa K, Nishiyama K, Shimanouchi T, Tanimoto Y, Morigaki K, Shimamoto K.
    • Journal Title

      Biophys. J.

      Volume: 117 Issue: 1 Pages: 99-110

    • DOI

      10.1016/j.bpj.2019.05.014

    • NAID

      120006844183

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Role of Lipid Anchor in GPI-anchored Protein2019

    • Author(s)
      野村薫
    • Journal Title

      Seibutsu Butsuri

      Volume: 59 Issue: 6 Pages: 295-299

    • DOI

      10.2142/biophys.59.295

    • NAID

      130007751047

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 蛋白質膜挿入因子MPIaseと抑制因子DAGによる膜物性変化2019

    • Author(s)
      野村薫
    • Organizer
      生有研シンポジウム“生体分子間に働く相互作用解析の現状と今後の可能性”
    • Related Report
      2019 Research-status Report
  • [Presentation] 固体NMRを用いたイモリの肢再生制御蛋白質におけるアンカリングの役割の解明2018

    • Author(s)
      野村薫、谷本泰士、林文雄、原田英里砂、単小遠、塩生真央、土方淳司、白井剛、森垣憲一、島本啓子
    • Organizer
      日本膜学会第40年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 蛋白質膜挿入促進因子MPIaseと抑制因子DAGによる膜物性変化2018

    • Author(s)
      森祥子、野村薫、山口敏幸、島内寿徳、谷本泰士、森垣憲一、藤川鉱樹、西山賢一、島本啓子
    • Organizer
      第12回バイオ関連化学シンポジウム
    • Related Report
      2018 Research-status Report
  • [Remarks]

    • URL

      http://www.sunbor.or.jp/rd/labo01.html

    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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