• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Analysis of elementary processes in the photocycle of sodium ion-pumping rhodopsin and an attempt to expand the substrate ion

Research Project

Project/Area Number 17K07326
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Functional biochemistry
Research InstitutionHokkaido University

Principal Investigator

Kikukawa Takashi  北海道大学, 先端生命科学研究院, 講師 (20281842)

Co-Investigator(Kenkyū-buntansha) 宮内 正二  東邦大学, 薬学部, 教授 (30202352)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsロドプシン / ナトリウムポンプ / 過渡吸収分光法 / フォトサイクル / 微生物ロドプシン / 膜輸送 / ナノディスク
Outline of Final Research Achievements

The molecular mechanism of Na+-pumping rhodopsin (NaR) was analyzed by employing time-resolved detection techniques and through functional characterization of novel NaR. The results are summarized in two topics. 1) NaR undergoes the photoreaction cycle containing K, L, M, O1, O2, N and NaR´ intermediates, in which Na+ is captured during O1 formation through the hydrated cytoplasmic channel and then released during O2 decay through extracellular channel without further hydration. 2) A novel NaR lacking N-terminal helix can pump not only Na+ but also K+.

Academic Significance and Societal Importance of the Research Achievements

細胞膜には、多くの物質輸送タンパク質が存在し、細胞の恒常性維持に貢献している。本研究で研究対象としたNa+ポンプ型ロドプシン(NaR)は、そのような輸送タンパク質の一つであるが、通常のタンパク質とは異なり、光で瞬間的に活性化できる利点がある。この特徴を生かした解析を行い、Na+輸送時に起こる一部の要素反応を明らかとした。また、新規のNaRの分子特性解析を通して、輸送イオン選択機構の一端を明らかとした。

Report

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

    (16 results)

All 2019 2018 2017 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Int'l Joint Research] Sogang University(韓国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Functional importance of the oligomer formation of the cyanobacterial H+ pump Gloeobacter rhodopsin2019

    • Author(s)
      Iizuka Azusa、Kajimoto Kousuke、Fujisawa Tomotsumi、Tsukamoto Takashi、Aizawa Tomoyasu、Kamo Naoki、Jung Kwang-Hwan、Unno Masashi、Demura Makoto、Kikukawa Takashi
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 10711-10711

    • DOI

      10.1038/s41598-019-47178-5

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Photochemical study of a cyanobacterial chloride-ion pumping rhodopsin2019

    • Author(s)
      Hasemi Takatoshi、Kikukawa Takashi、Watanabe Yumi、Aizawa Tomoyasu、Miyauchi Seiji、Kamo Naoki、Demura Makoto
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1860 Issue: 2 Pages: 136-146

    • DOI

      10.1016/j.bbabio.2018.12.001

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low-temperature Raman spectroscopy reveals small chromophore distortion in primary photointermediate of proteorhodopsin2018

    • Author(s)
      Fujisawa Tomotsumi、Abe Masahiro、Tamogami Jun、Kikukawa Takashi、Kamo Naoki、Unno Masashi
    • Journal Title

      FEBS Letters

      Volume: 592 Issue: 18 Pages: 3054-3061

    • DOI

      10.1002/1873-3468.13219

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Replacements of “H+ donor” residues in the light-driven H+-pump rhodopsins2019

    • Author(s)
      Kikukawa, T., Sasaki, S., Nishiya, K., Tsukamoto, T., Aizawa, T., Demura, M., Tamogami, J.
    • Organizer
      17th International Congress on Photobiology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time-resolved detection of Na+ uptake and release reactions of Na+-pumping rhodopsin2019

    • Author(s)
      Murabe, K., Kato, T., Tsukamoto, T., Aizawa, T., Demura, M., Kikukawa, T.
    • Organizer
      9th Asia and Oceania Conference on Photobiology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Importance of His166 for Cl--pump activity of Mastigocladopsis repens halorhodopsin2019

    • Author(s)
      岩間健人、渡邊弓、塚本卓、相沢智康、出村誠、菊川峰志
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] イオン選択膜を用いたNa+ポンプ型ロドプシンの機能解析2018

    • Author(s)
      村部圭祐, 菊川峰志, 塚本卓, 相沢智康, 出村誠
    • Organizer
      第45回生体分子科学討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] Photochemical analysis of sodium ion-pumping rhodopsin from Indibacter alkaliphilus2018

    • Author(s)
      加藤 朝也, 村部 圭祐, 菊川 峰志, 塚本 卓, 相沢 智康, 出村 誠
    • Organizer
      第56回日本生物物理学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Functional importance of trimer formation of light-driven H+ pump Gloeobacter rhodopsin2018

    • Author(s)
      Kikukawa, T.
    • Organizer
      18th International Conference on Retinal Proteins
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Cyanobacterial rhodopsin having TSD motif2017

    • Author(s)
      Kikukawa, T.
    • Organizer
      8th Asia and Oceania Conference on Photobiology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Photochemistry of cyanobacterial chloride ion-pumping rhodopsin2017

    • Author(s)
      Kikukawa, T., Hasemi, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      19th International Union for Pure and Applied Biophysics Congress and 11th European Biophysics Congress
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Functional analyses of Na+-pumping rhodopsin focusing on acidic residues on the extracellular surface2017

    • Author(s)
      Okamura, A., Kikukawa, T., Tsukamoto, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      第55回日本生物物理学会年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Analysis of Na+ transfer reactions of Na+-pumping rhodopsin2017

    • Author(s)
      Murabe, K., Kikukawa, T., Tsukamoto, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      第55回日本生物物理学会年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Functional importance of trimer formation of light-driven H+ pump Gloeobacter rhodopsin2017

    • Author(s)
      Iizuka, A., Kikukawa, T., Kajimoto, K., Fujisawa, T., Tsukamoto, T., Aizawa, T., Kamo, N., Unno, M., Demura, M.
    • Organizer
      第55回日本生物物理学会年会
    • Related Report
      2017 Research-status Report
  • [Presentation] Functional analysis of T126E mutant of Natronomonas pharaonis halorhodopsin2017

    • Author(s)
      Abe, S., Kikukawa, T., Tsukamoto, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      第55回日本生物物理学会年会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi