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Development of Protein-based Molecular Probes for Oxygen Concentration

Research Project

Project/Area Number 16K14712
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Biophysics
Research InstitutionOsaka University

Principal Investigator

Ishikawa Haruto  大阪大学, 理学研究科, 講師 (40551338)

Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsイメージング / タンパク質 / 生物無機化学 / バイオイメージング / 蛍光エネルギー移動 / 低酸素応答 / 酸素 / ヘム
Outline of Final Research Achievements

We have developed genetically encoded FRET sensor for oxygen tension in the cell. Sea lamprey hemoglobin (slHb) is primarily monomeric in oxy form, while slHb self-associates to dimers upon deoxygenation. The oxygen dependent monomer-dimer transition of slHb was used for the FRET sensor for the oxygen. For the detection of the oxygen concentration, the single cysteine residues in the slHb were labeled by Alexa Fluor 488 or 594. Purified slHb with Alexa Fluor dyes were mixed and measured the fluorescence spectra. There was no FRET in our system when the oxygen pressure was 0.2 atm, while slHb with Alexa Fluor dyes exhibited FRET signal in a deoxygenated condition. This result suggested that slHb system is suitable for the genetically encoded oxygen sensor. Next, we examined a FRET measurement for slHb with fluorescent protein. However, the expression of the fusion protein was difficult in E. coli. Further optimization will be necessary for the genetically encoded FRET sensor protein.

Report

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

    (7 results)

All 2018 2017 2016 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Journal Article] Tertiary Dynamics of Human Adult Hemoglobin Fixed in R and T Quaternary Structures2018

    • Author(s)
      Shanyan Chang, Misao Mizuno, Haruto Ishikawa and Yasuhisa Mizutani
    • Journal Title

      Phys. Chem. Chem. Phys.

      Volume: 20 Issue: 5 Pages: 3363-3372

    • DOI

      10.1039/c7cp06287g

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of the N-terminal residues on the quaternary dynamics of human adult hemoglobin2016

    • Author(s)
      Shanyan Chang, Misao Mizuno, Haruto Ishikawa, and Yasuhisa Mizutani
    • Journal Title

      Chemical Physics

      Volume: 469-470 Pages: 31-37

    • DOI

      10.1016/j.chemphys.2016.02.009

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Regulatory Implications of Structural Changes in Tyr201 of the Oxygen Sensor Protein FixL2016

    • Author(s)
      Takeo Yamawaki, Haruto Ishikawa, Misao Mizuno, Hiro Nakamura, Yoshitsugu Shiro, and Yasuhisa Mizutani
    • Journal Title

      Biochemistry

      Volume: 55 Issue: 29 Pages: 4027-4035

    • DOI

      10.1021/acs.biochem.6b00405

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Redox-Dependent Dynamics in Heme-Bound Bacterial Iron Response Regulator (Irr) Protein2016

    • Author(s)
      Kazuo Kobayashi, Megumi Nakagaki, Haruto Ishikawa, Kazuhiro Iwai, Mark R O’Brian, Koichiro Ishimori
    • Journal Title

      Biochemistry

      Volume: 55 Issue: 29 Pages: 4047-4054

    • DOI

      10.1021/acs.biochem.6b00512

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Study of the Dynamics of the Heme Pocket and C-helix in CooA Upon CO Dissociation Using Time-resolved Visible and UV Resonance Raman Spectroscopy2016

    • Author(s)
      Akihiro Otomo, Haruto Ishikawa, Misao Mizuno, Tetsunari Kimura, Minoru Kubo, Yoshitsugu Shiro, Shigetoshi Aono, and Yasuhisa Mizutani
    • Journal Title

      J. Phys. Chem. B

      Volume: 120 Issue: 32 Pages: 7836-7843

    • DOI

      10.1021/acs.jpcb.6b05634

    • Related Report
      2016 Research-status Report
    • Peer Reviewed
  • [Presentation] Genetically encoded fluorescent oxygen sensor2017

    • Author(s)
      Haruto Ishikawa
    • Organizer
      KAKENHI International Symposium on “Studying the Function of Soft Molecular Systems”
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 大阪大学水谷研究室ホームページ

    • URL

      http://www.chem.sci.osaka-u.ac.jp/lab/mizutani/index-jp.html

    • Related Report
      2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2019-03-29  

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