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Electron crystallographic analysis of tomographic volumes of 2D crystals of membrane proteins

Research Project

Project/Area Number 17K19347
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Molecular and Genome biology and related fields
Research InstitutionMie University (2019)
Nagoya University (2017-2018)

Principal Investigator

Tani Kazutoshi  三重大学, 医学系研究科, 特任教授(研究担当) (20541204)

Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsクライオ電子顕微鏡 / 電子線結晶学 / クライオトモグラフィー / 二次元結晶 / F型ATPase / 負染色 / 膜タンパク質 / 電子線トモグラフィー
Outline of Final Research Achievements

Observing the three-dimensional structure of a membrane protein embeded into lipids, close to natural environment, is highly likely to provide important knowledge for clarifying its physiological function. For such structural analysis, electron crystallograpy using a two-dimensional (2D) crystal of membrane protein is definitely suitable. Under some conditions, membrane proteins are arranged in a 2D sheet after reconstitution into a lipid bilayer. However even if the 2D crystal production is successful, the possiblity of obtaining a crytal giving good diffraction is quite low. Most of them cannot be applied to electron crystallography. In this study, we established and evaluated a method that enables structural analysis of 2D crystals with poor crystallinity that were not tackled by conventional analysis methods.

Academic Significance and Societal Importance of the Research Achievements

構造解析不可能であった結晶性の悪い二次元結晶からでも立体構造が得られるようになった意義は大きい。本手法は、三次元結晶由来の三次元再構成から平面領域を切り出すことができれば、仮想的な二次元結晶として構造解析が可能になる。このように適用範囲は、理論的には二次元結晶から三次元結晶までカバーすることができる点は有用であるが、分解能に関しては、原理上、結晶内の対象物の並び方に依存するため大幅な向上は期待できない。但し、分解能が低い場合でも、X線構造解析などで部分決定された原子モデルをフィッティングできれば、疑似的な原子モデルを作製し、変異体デザインを含めた機能発見といった目的などへ貢献できる。

Report

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

    (10 results)

All 2020 2019 2017

All Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results,  Acknowledgement Compliant: 1 results) Presentation (4 results) (of which Invited: 3 results)

  • [Journal Article] Cryo-EM structures of undocked innexin-6 hemichannels in phospholipids2020

    • Author(s)
      Burendei Batuujin、Shinozaki Ruriko、Watanabe Masakatsu、Terada Tohru、Tani Kazutoshi、Fujiyoshi Yoshinori、Oshima Atsunori
    • Journal Title

      Science Advances

      Volume: 6 Issue: 7

    • DOI

      10.1126/sciadv.aax3157

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural insights into thermostabilization of leucine dehydrogenase from its atomic structure by cryo-electron microscopy2019

    • Author(s)
      Yamaguchi Hiroki、Kamegawa Akiko、Nakata Kunio、Kashiwagi Tatsuki、Mizukoshi Toshimi、Fujiyoshi Yoshinori、Tani Kazutoshi
    • Journal Title

      Journal of Structural Biology

      Volume: 205 Issue: 1 Pages: 11-21

    • DOI

      10.1016/j.jsb.2018.12.001

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Crystal structures of claudins: insights into their intermolecular interactions.2017

    • Author(s)
      H. Suzuki, K. Tani, Y. Fujiyoshi
    • Journal Title

      Ann. N. Y. Acad. Sci.

      Volume: N/A Issue: 1 Pages: 25-34

    • DOI

      10.1111/nyas.13371

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] The cryo-EM structure of gastric H+,K+-ATPase with bound BYK99, a high-affinity member of K+-competitive, imidazo[1,2-a]pyridine inhibitors2017

    • Author(s)
      Abe Kazuhiro、Shimokawa Jun、Naito Mao、Munson Keith、Vagin Olga、Sachs George、Suzuki Hiroshi、Tani Kazutoshi、Fujiyoshi Yoshinori
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 6632-6632

    • DOI

      10.1038/s41598-017-06698-8

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] X-ray structures of endothelin ETB receptor bound to clinical antagonist bosentan and its analog2017

    • Author(s)
      Shihoya Wataru、Nishizawa Tomohiro、Yamashita Keitaro、Inoue Asuka、Hirata Kunio、Kadji Francois Marie Ngako、Okuta Akiko、Tani Kazutoshi、Aoki Junken、Fujiyoshi Yoshinori、Doi Tomoko、Nureki Osamu
    • Journal Title

      Nature Structural & Molecular Biology

      Volume: 24 Issue: 9 Pages: 758-764

    • DOI

      10.1038/nsmb.3450

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] エンドセリンの受容体初期活性化機構2017

    • Author(s)
      土井 知子、谷 一寿
    • Journal Title

      医学のあゆみ

      Volume: 262 Pages: 812-813

    • Related Report
      2017 Research-status Report
  • [Presentation] クライオ電子顕微鏡を用いた蛋白質の立体構造決定へ向けた技術開発と応用2019

    • Author(s)
      谷一寿
    • Organizer
      日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] クライオ電子顕微鏡によるタンパク質構造解析とその展開2019

    • Author(s)
      谷一寿
    • Organizer
      スマートセルイノベーション研究センター講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] クライオ電子顕微鏡で分子構造を観る、 構造情報を活かす2017

    • Author(s)
      谷 一寿
    • Organizer
      先端医療センターシンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 創薬へ向けたクライオ電子顕微鏡による膜タンパク質の構造研究2017

    • Author(s)
      谷 一寿
    • Organizer
      2017 BIOVIA Forum
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-07-21   Modified: 2021-02-19  

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