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Developement of technology for visualising lipid bilayers in crystals of membrane proteins

Research Project

Project/Area Number 20K20376
Project/Area Number (Other) 18H05367 (2018-2019)
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund (2020)
Single-year Grants (2018-2019)
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Toyoshima Chikashi  東京大学, 定量生命科学研究所, 特任教授 (70172210)

Co-Investigator(Kenkyū-buntansha) 恒川 直樹  東京大学, 定量生命科学研究所, 特任研究員 (90638800)
秋葉 俊彦  東京大学, 定量生命科学研究所, 特任研究員 (80291889)
Project Period (FY) 2018-06-29 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥25,610,000 (Direct Cost: ¥19,700,000、Indirect Cost: ¥5,910,000)
Fiscal Year 2020: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2019: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2018: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Keywords脂質二重膜 / X線結晶解析 / 膜蛋白質 / 結晶 / 結晶解析 / 結晶大型化 / 構造生物学
Outline of Research at the Start

本研究は、燐脂質と膜蛋白質との相互作用の詳細の解明を目指し、膜蛋白質結晶中の脂質二重膜を可視化する技術を開発しようというものである。そのためには、脂質二重膜からの寄与が大きくなる、分解能10Åよりも低角の反射点の位相を決定する必要があり、多重同型置換法と溶媒コントラスト変調法、その両者を組み合わせた技術を開発する。当面の材料としては、実績のあるカルシウムポンプ結晶を用いる。

Outline of Final Research Achievements

Aiming at a truly comprehensive structural biology of membrane proteins, we have been developing technology for visualizing all components, from protons to lipid bilayers, required for functioning of membrane proteins. Our first goal is to establish the methods for visualizing lipid bilayers in crystals of membrane proteins, or determining phases of reflections at lower than 10 Angstrom resolution. For that purpose, we designed X-ray solvent contrast modulation, multiple isomorphous replacements and their combinations, and carried out extensive measurements using crystals of ion pumps. Furthermore, we tried to develop methodology for generating larger crystals of membrane proteins aiming at the solvent contrast modulation using neutron diffraction.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果、低角反射に対する位相決定技術が拡充され、既に実績のある溶媒コントラスト変調法に関しても適用できる結晶が大幅に拡大した。その結果、これまでX線結晶解析が機能しないためにごく限られた知見しかない、燐脂質と膜蛋白質との相互作用の詳細を明らかにすることが可能になった他、蛋白質結晶中で熱運動が大きくて解像できなかった糖鎖等も解像できるようになった。クライオ電子顕微鏡法では燐脂質頭部が解像されないことが多いため、本研究で開発した技術との組み合わせも追及されるべきであろう

Report

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

    (14 results)

All 2022 2020 2019 2018 Other

All Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 9 results) Remarks (1 results)

  • [Journal Article] Cryoelectron microscopy of Na+,K+-ATPase in the two E2P states with and without cardiotonic steroids.2022

    • Author(s)
      Ryuta Kanai , Flemming Corneliusb , Bente Vilsenb , Chikashi Toyoshima
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 15

    • DOI

      10.1073/pnas.2123226119

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Binding of cardiotonic steroids to Na+,K+-ATPase in the E2P state2020

    • Author(s)
      Kanai Ryuta、Cornelius Flemming、Ogawa Haruo、Motoyama Kanna、Vilsen Bente、Toyoshima Chikashi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 1 Pages: 1-12

    • DOI

      10.1073/pnas.2020438118

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] What ATP binding does to the Ca2+ pump and how nonproductive phosphoryl transfer is prevented in the absence of Ca2+2020

    • Author(s)
      Kabashima Yoshiki、Ogawa Haruo、Nakajima Rie、Toyoshima Chikashi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 117 Issue: 31 Pages: 18448-18458

    • DOI

      10.1073/pnas.2006027117

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] X線コントラスト変調法によって明らかになった膜蛋白質と燐脂質の相互作用のダイナミクス2018

    • Author(s)
      豊島 近、乗松 良行
    • Journal Title

      放射光

      Volume: 31 Pages: 212-218

    • NAID

      40021599683

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] What is the activation signal for phosphoryl transfer in the calcium2019

    • Author(s)
      豊島 近
    • Organizer
      Honorary Skou Professor Seminar,Aarhus University, Aarhus, Denmark
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] イオンポンプの構造生物学:脂質二重膜からプロトンまで2019

    • Author(s)
      豊島 近
    • Organizer
      2019年度iBIX-JAXA-KEK物構研-QST合同研究会「クライオEM、X線、中性子タンパク質構造解析の住み分け」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] P 型 ATPase によるイオン輸送とその制御機構2019

    • Author(s)
      豊島 近
    • Organizer
      日本薬学会 第139年会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Role of phospholipids in ion pumping2018

    • Author(s)
      豊島 近
    • Organizer
      5th ShanghaiTech-SIAIS BioForum
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 原子構造に基づく筋小胞体カルシウムポンプの制御機構2018

    • Author(s)
      豊島 近
    • Organizer
      日本筋学会第4会学術集会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] カルシウムポンプの結晶構造解析の現状2018

    • Author(s)
      豊島 近
    • Organizer
      第2回SPring-8における蛋白質構造生物学研究の現状と将来
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Structural Biology of the Calcium Pump2018

    • Author(s)
      豊島 近
    • Organizer
      第18回国際薬理学・臨床薬理学会議
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Structural Biology of Ion Pumps2018

    • Author(s)
      豊島 近
    • Organizer
      Post Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Structural Biology of Ion Pumps2018

    • Author(s)
      豊島 近
    • Organizer
      The 2nd International Symposium on Chemical Communication
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 豊島研究室ホームページ

    • URL

      http://www.iam.u-tokyo.ac.jp/StrBiol/index.html

    • Related Report
      2018 Annual Research Report

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Published: 2018-07-20   Modified: 2024-03-26  

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