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Solar-powered bioremediation by bacterial transporters

Research Project

Project/Area Number 16K14044
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Green/Environmental chemistry
Research InstitutionHokkaido University

Principal Investigator

Demura Makoto  北海道大学, 先端生命科学研究院, 教授 (70188704)

Research Collaborator KIKUKAWA takashi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsイオンポンプ / プロトンポンプ / ナトリウムポンプ / 多剤排出 / 微生物ロドプシン / エネルギー共役 / 環境技術 / 生物物理 / 応用微生物 / 蛋白質
Outline of Final Research Achievements

We aimed to make an energy-coupling system between light-driven ion-pumping microbial rhodopsins and ion-coupled multidrug transporters for future development of a solar-powered bioremediation by bacterial cells. The results could be summarized as follows: 1) Compared to H+ pump rhodopsin, Na+ pump rhodopsin was revealed to efficiently drive the drug transporter, 2) From a Gram-positive bacterium inhabiting Antarctica, we found a strong inward H+ pump rhodopsin, which might be utilized to drive the inward multidrug transport.

Academic Significance and Societal Importance of the Research Achievements

細菌の細胞膜には種々の物質輸送蛋白質が存在する。本研究では、微生物型ロドプシンと多剤排出蛋白質の2種の蛋白質に注目した。微生物型ロドプシンは、光をエネルギー源として細胞膜を隔てたH+やNa+の濃度勾配を作り出すことができる。一方、多剤排出蛋白質は、これらのイオン濃度勾配を利用して、様々な薬物を膜輸送できる。これらを組み合わせることで、太陽光をエネルギー源として、環境中の様々な薬物を細胞内へ蓄積する「環境浄化細菌」を作製できる可能性がある。この作製のために、1)薬物輸送の効率を高める方法の検討、2)既存の微生物型ロドプシンの機能強化、3)高い機能を持つ微生物型ロドプシンの探索を行った。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2019 2018 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [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 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photochemical characterization of actinorhodopsin and its functional existence in the natural host2016

    • Author(s)
      Nakamura, S., Kikukawa, T., Tamogami, J., Kamiya, M., Aizawa, T., Hahn, M., Ihara, K., Kamo, N., Demura, M.
    • Journal Title

      BBA-BIOENERGETICS

      Volume: 1857 Issue: 12 Pages: 1900-1908

    • DOI

      10.1016/j.bbabio.2016.09.006

    • NAID

      120006366475

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [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 Annual Research 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 Annual Research Report
  • [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
  • [Presentation] Solid-state NMR analysis of sodium ion pump rhodopsin and its Na+-binding2016

    • Author(s)
      Tamaki, H., Saito, Y., Egawa, A., Kikukawa, T., Fujiwara, T., Demura, M.
    • Organizer
      17th International Conference on Retinal Proteins
    • Place of Presentation
      ポツダム(ドイツ)
    • Year and Date
      2016-10-03
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Replacements of “donor” residues in the light- driven H+-pump rhodopsins2016

    • Author(s)
      Nishiya, K., Sasaki, S., Tamogami, J., Kikukawa, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      第54回日本生物物理学会年会
    • Place of Presentation
      つくば国際会議場(茨城県・筑波)
    • Related Report
      2016 Research-status Report
  • [Presentation] Photocycle of Mastigocladopsis repens halorhodopsin and the role of its TSD motif2016

    • Author(s)
      Hasemi, T., Kikukawa, T., Aizawa, T., Kamo, N., Demura, M.
    • Organizer
      第54回日本生物物理学会年会
    • Place of Presentation
      つくば国際会議場(茨城県・筑波)
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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