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Characterization of a metalloenzyme producing oxygen molecule from nitric oxide

Research Project

Project/Area Number 19K22208
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 34:Inorganic/coordination chemistry, analytical chemistry, and related fields
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Tosha Takehiko  国立研究開発法人理化学研究所, 放射光科学研究センター, 専任研究員 (00548993)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords一酸化窒素 / 金属酵素 / 嫌気的メタン酸化 / 酸素発生 / 不均化 / ヘム / 酸素分子発生
Outline of Research at the Start

NO不均化反応(2NO → N2 + O2)を触媒すると推定されているNO不均化酵素(NOD)を研究対象とする。NODの配列をもつ遺伝子を入手し、大腸菌での発現系を構築する。精製したNODの機能解析を行い、NO不均化活性を示すか調べる。機能をもつNODが調製できれば、時間分解分光計測や構造解析から、NODの構造機能相関および酵素反応機構を解明する。得られる結果を基盤に、これまでに報告例のない酵素によるNO不均化反応の分子機構を提案する。

Outline of Final Research Achievements

On the basis of the proposal that a bacterium, Candidatus Methylomirabilis oxyfera, which obtains energy by anaerobic methane oxidation would have a protein catalyzing dismutation of nitric oxide (NO) by following reaction; 2NO → O2 + N2, putative NO dismutase (NOD) was expressed in Escherichia coli and was purified. Purified recombinant NOD showed intense absorption at the visible region, suggesting that NOD contains heme as expected from the fact that the amino acid sequence exhibits significant similarity to nitric oxide reductase (NOR) which has hemes. Although the similarity of the amino acid sequence to NOR, purified NOD showed no NO reduction activity. Proposed NO dismutase activity was not also detected for purified NOD.

Academic Significance and Societal Importance of the Research Achievements

NODにおいて提案されている一酸化窒素(NO)の不均化反応(2NO → O2 + N2)は、これまでに報告例のない生体内反応であり、その反応機構の理解は、生化学分野のみならず錯体化学・触媒化学分野など多くの研究分野において、ブレークスルーをもたらすと期待される。本研究では、NOD特有の機能を解析するまでにはいたらなかったが、NODタンパク質を組み換え体として発現させ精製することができた。本成果を土台として今後の研究が進むことで、NODの構造機能に関する理解が進み、新たなケミストリーが展開されることを期待したい。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (16 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 4 results)

  • [Int'l Joint Research] University of Liverpool/University of Leeds(英国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] NO Dynamics in Microbial Denitrification System2021

    • Author(s)
      Tosha Takehiko、Yamagiwa Raika、Sawai Hitomi、Shiro Yoshitsugu
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 2 Pages: 280-288

    • DOI

      10.1246/cl.200629

    • NAID

      130007986360

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Timing of NO Binding and Protonation in the Catalytic Reaction of Bacterial Nitric Oxide Reductase as Established by Time-Resolved Spectroscopy.2020

    • Author(s)
      Hanae Takeda, Tatsunari Kimura, Takashi Nomura, Masaki Horitani, Azusa Yokota, Akiko Matsubayashi, Shoko Ishii, Yoshitsugu Shiro, Minoru Kubo and Takehiko Tosha
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: - Issue: 7 Pages: 825-833

    • DOI

      10.1246/bcsj.20200038

    • NAID

      130007879554

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Time-resolved studies of metalloproteins using X-ray free electron laser radiation at SACLA2020

    • Author(s)
      Suga Michihiro、Shimada Atsuhiro、Akita Fusamichi、Shen Jian-Ren、Tosha Takehiko、Sugimoto Hiroshi
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - General Subjects

      Volume: 1864 Issue: 2 Pages: 129466-129466

    • DOI

      10.1016/j.bbagen.2019.129466

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dimeric structures of quinol-dependent nitric oxide reductases (qNORs) revealed by cryo-electron microscopy2019

    • Author(s)
      Gopalasingam Chai C.、Johnson Rachel M.、Chiduza George N.、Tosha Takehiko、Yamamoto Masaki、Shiro Yoshitsugu、Antonyuk Svetlana V.、Muench Stephen P.、Hasnain S. Samar
    • Journal Title

      Science Advances

      Volume: 5 Issue: 8

    • DOI

      10.1126/sciadv.aax1803

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hijacking the Heme Acquisition System of Pseudomonas aeruginosa for the Delivery of Phthalocyanine as an Antimicrobial2019

    • Author(s)
      Shisaka Yuma、Iwai Yusuke、Yamada Shiho、Uehara Hiromu、Tosha Takehiko、Sugimoto Hiroshi、Shiro Yoshitsugu、Stanfield Joshua K.、Ogawa Kazuya、Watanabe Yoshihito、Shoji Osami
    • Journal Title

      ACS Chemical Biology

      Volume: 14 Issue: 7 Pages: 1637-1642

    • DOI

      10.1021/acschembio.9b00373

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Visualization of Enzymatic Reactions Using SACLA2019

    • Author(s)
      TOSHA Takehiko、KUBO Minoru
    • Journal Title

      Seibutsu Butsuri

      Volume: 59 Issue: 4 Pages: 205-207

    • DOI

      10.2142/biophys.59.205

    • NAID

      130007683542

    • ISSN
      0582-4052, 1347-4219
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 光解離性ケージド基質を利用した時間分解構造解析による酵素反応の可視化2020

    • Author(s)
      當舎武彦
    • Organizer
      日本薬学会第141回年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] マイクロ秒時間領域で形成される一酸化窒素還元酵素反応中間体の分光解析2020

    • Author(s)
      當舎武彦
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 構造生物学におけるXFELと放射光の相補的利用~金属酵素の反応機構解明を目指して~2020

    • Author(s)
      當舎武彦
    • Organizer
      放射光ユーザーのためのSACLAの利活用に関するワークショップ
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 時間分解結晶構造解析および分光解析が明らかにする金属酵素による一酸化窒素分解機構2020

    • Author(s)
      當舎武彦
    • Organizer
      第2回量子線科学セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Elucidation of NO reduction mechanism in soluble NO reductase by time-resolved crystallography with photosensitive caged compound2019

    • Author(s)
      Takehiko Tosha
    • Organizer
      32nd European Crystallographic Meeting (ECM32)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Mechanism of P450nor-Catalyzed NO Reduction Proved by Time-Resolved Spectroscopic and Crystallographic Analyses2019

    • Author(s)
      T. Tosha, T. Nomura, H. Takeda, T. Kimura, H. Sugimoto, M. Kubo and Y. Shiro
    • Organizer
      19th International Conference on Biological Inorganic Chemistry
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Functional roles of conserved residues near the active site of nitric oxide reductase based on the structural analysis2019

    • Author(s)
      當舎武彦、山際来佳、倉橋拓也、新井博之、杉本宏、城宜嗣
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] NO-binding and protonation process in the catalytic reaction of the bacterial Nitric oxide reductase as established by time-resolved spectroscopy2019

    • Author(s)
      武田英恵、木村哲就、野村高志、當舎武彦、城宜嗣、久保稔
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] NO-binding and Protonation Process in the Catalytic Reaction of Heme/non-heme Iron Nitric Oxide Reductase Proved by Time-Resolved Spectroscopic System2019

    • Author(s)
      H. Takeda, T. Kimura, T. Nomura, T. Tosha, Y. Shiro, M. Kubo
    • Organizer
      15th International Symposium on Applied Bioinorganic Chemistry(ISABIC)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-07-04   Modified: 2022-01-27  

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