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Analysis of respiratory electron transport chain using the paramagnetic probes

Research Project

Project/Area Number 15K20829
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Structural biochemistry
Molecular biology
Research InstitutionHokkaido University

Principal Investigator

SAIO Tomohide  北海道大学, 理学研究院, 助教 (80740802)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords呼吸鎖 / 電子伝達 / NMR / 立体構造 / ダイナミクス / 常磁性ランタニド / 溶液構造
Outline of Final Research Achievements

Electron transfer (ET) process is at the heart of a number of key physiological processes, such as aerobic and anaerobic respiration. Among them, ET from Cytochrome c (Cyt c) to Cytochrome c oxidase (CcO) in mitochondrial respiration is one of the best-studied processes. In this project, we took an NMR-based approach exploiting paramagnetic effects and relaxation dispersion method, and redox-dependent structural and dynamical changes of human Cyt c were investigated. Our study identified significant redox-dependent structural changes in several regions of Cyt c. These differences would be essential for the discrimination of the redox states in Cyt c by CcO during the electron transfer. Dynamics studies by NMR identified that the region around His33 undergoes conformational exchanges, suggesting that the dynamic property of the region located far from the binding site for CcO contributes to the conformational changes upon the electron transfer.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (7 results)

All 2017 2016 2015 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results) Presentation (4 results) (of which Invited: 1 results) Remarks (1 results)

  • [Journal Article] Energetic Mechanism of Cytochrome c - Cytochrome c Oxidase Electron Transfer Complex Formation under Turnover Conditions Revealed by Mutational Effects and Docking Simulation2016

    • Author(s)
      W. Sato, S. Hitaoka, K. Inoue, M. Imai, T. Saio, T. Uchida, K. Shinzawa-Itoh, S. Yoshikawa, K. Yoshizawa, and K. Ishimori
    • Journal Title

      J. Biol. Chem.

      Volume: 291 Issue: 29 Pages: 15320-15331

    • DOI

      10.1074/jbc.m115.708065

    • NAID

      120006324913

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Investigation of the redox-dependent modulation of structure and dynamics in human cytochrome c.2016

    • Author(s)
      Imai M, Saio T, Kumeta H, Uchida T, Inagaki F, Ishimori K.
    • Journal Title

      Biochem Biophys Res Commun.

      Volume: 469 Issue: 4 Pages: 978-984

    • DOI

      10.1016/j.bbrc.2015.12.079

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] パルスESRとGd3+を用いたマルチドメイン蛋白質MurDの構造変化解析2017

    • Author(s)
      平松 蒼野, 齋尾 智英, 浅田 瑞枝, 瀧下 俊平, 稲垣 冬彦, 中村 敏和, 石森 浩一郎
    • Organizer
      第17回 日本蛋白質科学会年会
    • Place of Presentation
      仙台国際センター (宮城県・仙台市)
    • Year and Date
      2017-06-20
    • Related Report
      2016 Annual Research Report
  • [Presentation] Exploring conformational equilibria of a multi-domain protein MurD by paramagnetic lanthanide probe in NMR and EPR2017

    • Author(s)
      Tomohide Saio, Soya Hiramatsu, Mizue Asada, Shunpei Takishita, Toshikazu Nakamura, Koichiro Ishimori
    • Organizer
      第17回 日本蛋白質科学会年会
    • Place of Presentation
      仙台国際センター (宮城県・仙台市)
    • Year and Date
      2017-06-20
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] パルスESRとガドリニウムタグを用いたマルチドメイン蛋白質MurDの構造変化解析2017

    • Author(s)
      平松 蒼野, 齋尾 智英, 浅田 瑞枝, 瀧下 俊平, 稲垣 冬彦, 中村 敏和, 石森 浩一郎
    • Organizer
      化学系学協会北海道支部2017冬季研究発表会
    • Place of Presentation
      北海道大学 (北海道・札幌市)
    • Related Report
      2016 Annual Research Report
  • [Presentation] ミトコンドリア呼吸鎖のシトクロム c- シトクロム c 酸化酵素複合体における電子伝達反応の 構造制御機構2015

    • Author(s)
      今井 瑞依,斉尾 智英,内田 毅,伊藤 - 新澤 恭子,吉川 信也,石森 浩一郎
    • Organizer
      第15回日本蛋白質科学会年会
    • Place of Presentation
      あわぎんホール(徳島県徳島市)
    • Year and Date
      2015-06-24
    • Related Report
      2015 Research-status Report
  • [Remarks] 北海道大学大学院理学研究院化学部門 構造化学研究室 ホームページ 研究概要

    • URL

      http://wwwchem.sci.hokudai.ac.jp/~stchem/research-outline/

    • Related Report
      2016 Annual Research Report

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Published: 2015-04-16   Modified: 2018-03-22  

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