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Active Site Model of Novel Copper Monooxygenase and Application to Oxidative Degradation of polysaccharides

Research Project

Project/Area Number 19K22201
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 InstitutionOsaka University

Principal Investigator

Itoh Shinobu  大阪大学, 工学研究科, 教授 (30184659)

Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords単核銅含有銅モノオキシゲナーゼ / 多糖類の酸化的分解反応 / 酵素活性中心モデル錯体 / 分子状酸素の活性化 / 反応機構 / 不活性アルカンの酸化 / 多糖類分解酵素 / メタン酸化酵素 / 銅錯体 / 酸化反応機構 / 構造活性相関 / 銅含有酸素添加酵素 / 活性中心モデル錯体 / 酸素活性化
Outline of Research at the Start

リグノセルロース系バイオマスは、バイオ燃料の原料として地球上に最も豊富に存在する 原材料であり、主に、セルロースやヘミセルロースと芳香族系の高分子(リグニン)で構成されている。このリグノセルロース系バイオマスは、再生可能エネルギーの原料としてのみならず、化学製品の材料としても大きな可能性を秘めている。本研究では、最近発見された新しい銅含有酸素添加酵素であるPolysaccharide Monooxygenase(PMO)に着目し、酵素活性中心の精密なモデル化と、それを用いた反応機構の解明、および多糖類の酸化的分解反応系の開発を行う。

Outline of Final Research Achievements

Polysaccharide monooxygenase (PMO), a newly discovered copper-containing monooxygenase, has been attracting much recent attention from the viewpoint of effective biomass utilization. A characteristic structural unit found in the active sites of PMOs consists of an amino group and a side chain of the N-terminal histidine with a side chain of a second histidine to create a T-shaped N3 geometry, so-called Histidine Brace, where oxidative cleavage of the β-1,4-glycosidic bond of cellulose takes place using molecular oxygen as the oxidant. However, mechanistic details of the enzymatic reaction have yet to be clarified. In this study, we designed and synthesized model complexes of the PMO active center to clarify the importance of the Histidine Brace structural motif and the details of the reaction mechanism and developed efficient catalytic oxidation reactions of polysaccharides as well as inert alkanes.

Academic Significance and Societal Importance of the Research Achievements

銅錯体による分子状酸素の活性化は、錯体化学、触媒化学、生物無機化学などの分野における重要な研究課題である。これまでに、一連の二核銅-活性酸素錯体が合成され、構造、分光学的特性、反応性などが明らかにされてきたが、単核銅活性酸素錯体に関する研究は遅れている。本研究では、新しい単核銅含有モノオキシゲナーゼ活性中心の構造と機能に着目し、その精密モデル化と、それを用いた多糖類および不活性アルカンの触媒的酸化反応を開発した。本研究の成果は、単核銅中心における分子状酸素の活性化機構の解明に繋がるのみならず、新しいバイオ燃料合成のための触媒技術開発に対して重要な情報を提供するものとして、その意義は大きい。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (21 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (8 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 8 results) Presentation (9 results) (of which Int'l Joint Research: 9 results,  Invited: 9 results) Book (3 results)

  • [Int'l Joint Research] University of Heiderberg(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Dynamic behavior of copper-oxygen species in tyrosinase mechanism2021

    • Author(s)
      藤枝 伸宇、伊東 忍
    • Journal Title

      生化学

      Volume: 93 Issue: 4 Pages: 521-525

    • DOI

      10.14952/SEIKAGAKU.2021.930521

    • NAID

      40022687557

    • ISSN
      0037-1017
    • Year and Date
      2021-08-25
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hydroxylation of Unactivated C(sp3)-Bonds with m-CPBA Catalyzed by FeIII-complex Supported by Trianionic Planar Tetradentate Ligand2021

    • Author(s)
      Yuma Morimoto; Shinichi Hanada; Ryusuke Kamada; Arisa Fukatsu; Hideki Sugimoto; Shinobu Itoh
    • Journal Title

      Inorg. Chem.

      Volume: ASAP Issue: 11 Pages: 7641-7649

    • DOI

      10.1021/acs.inorgchem.0c03469

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Revisiting Alkane Hydroxylation with m‐CPBA (mChloroperbenzoic Acid) Catalyzed by Nickel(II) Complexes2021

    • Author(s)
      Shinke, T., Itoh, M., Wada, T., Morimoto, Y., Yanagisawa, S., Sugimoto, H., Kubo, M., Itoh S.
    • Journal Title

      Chemistry A European Journal

      Volume: 27 Issue: 59 Pages: 14730-14737

    • DOI

      10.1002/chem.202102532

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Controlling Reactivity of Copper(II) Acylperoxide Complexes2021

    • Author(s)
      Yuma Morimoto, Makito Kawai, Aya Nakanishi, Hideki Sugimoto, and Shinobu Itoh
    • Journal Title

      Inorg. Chem.

      Volume: 60 Issue: 12 Pages: 8554-8565

    • DOI

      10.1021/acs.inorgchem.1c00475

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Copper‐oxygen Dynamics in Tyrosinase Mechanism2020

    • Author(s)
      Fujieda Nobutaka、Umakoshi Kyohei、Ochi Yuta、Nishikawa Yosuke、Yanagisawa Sachiko、Kubo Minoru、Kurisu Genji、Itoh Shinobu
    • Journal Title

      Angewandte Chemie International Edition

      Volume: - Issue: 32 Pages: 13385-13390

    • DOI

      10.1002/anie.202004733

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Modelling ‘Histidine Brace’ Motif in Mononuclear Copper Monooxygenases2020

    • Author(s)
      Arisa Fukatsu, Yuma Morimoto, Hideki Sugimoto and Shinobu Itoh*
    • Journal Title

      Chem. Commun.

      Volume: 56 Issue: 38 Pages: 5123-5126

    • DOI

      10.1039/d0cc01392g

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cupin Variants as a Macromolecular Ligand Library for Stereoselective Michael Addition of Nitroalkanes2020

    • Author(s)
      Fujieda Nobutaka、Ichihashi Haruna、Yuasa Miho、Nishikawa Yosuke、Kurisu Genji、Itoh Shinobu
    • Journal Title

      Angewandte Chemie International Edition

      Volume: in Issue: 20 Pages: 7717-7720

    • DOI

      10.1002/anie.202000129

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Theoretical Rationalization in the Equilibrium between (μ-η2:η2-Peroxido)CuIICuII and Bis(μ-oxido)CuIIICuIII Complexes: Effects of Distances between Nitrogen Atoms in Diamine Frameworks2020

    • Author(s)
      Tsukasa Abe, Yoshihito Shiota, Shinobu Itoh, and Kazunari Yoshizawa*
    • Journal Title

      Dalton Trans.

      Volume: 2020 Issue: 20 Pages: 6710-6717

    • DOI

      10.1039/d0dt01001d

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Copper Action in Type-3 Copper Monooxygenase Tyrosinase2021

    • Author(s)
      Shinobu Itoh
    • Organizer
      Electronic Biological Inorganic Chemistry Symposium (eBIC)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Controlling Copper(I)-Dioxygen Reactivity in A Simple Ligand System2021

    • Author(s)
      Shinobu Itoh
    • Organizer
      2021 JBNU International On-line Bioinorganic Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometric Control of Copper-Oxygen Chemistry2021

    • Author(s)
      Shinobu Itoh
    • Organizer
      Pacifichem 2020 (Metals in Biological Chemistry: C-H Bond Activation by Metalloenzymes and Models)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Catalytic Alkane Hydroxylation by Transition-metal/Acylperoxide Systems2021

    • Author(s)
      Shinobu Itoh
    • Organizer
      American Chemical Society National Meeting (Spring)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Geometric Control of Copper-Oxygen Species2021

    • Author(s)
      Shinobu Itoh
    • Organizer
      Pacifichem 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxygen Activation Mechanism by Copper Monooxygenases and Models2019

    • Author(s)
      Shinobu Itoh
    • Organizer
      15th International Symposium on Applied Bioinorganic Chemistry (ISABC-15)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] C-C Bond Formation Reaction Catalyzed by Cupric Superoxide Complex2019

    • Author(s)
      Shinobu Itoh, Tsukasa Abe, Yuta Hori, Yoshihito Shiota, Takehiro Ohta, Yuma Morimoto, Hideki Sugimoto, Takashi Ogura, and Kazunari Yoshizawa
    • Organizer
      7th Asian Conference on Coordination Chemistry (ACCC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Phenol Oxygenation Mechanism at Dinuclear Copper Site in Tyrosinase2019

    • Author(s)
      Shinobu Itoh
    • Organizer
      12th China‐Japan Joint Symposium on Metal Cluster Compounds (CJJSMCC2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] New Insight into The Tyrosinase Mechanism2019

    • Author(s)
      Shinobu Itoh
    • Organizer
      Korea-Taiwan-Japan Bioinorganic Chemistry Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 生命金属ダイナミックス2021

    • Author(s)
      藤枝伸宇・伊東 忍
    • Total Pages
      9
    • Publisher
      (株)エヌ・ティー・エス
    • ISBN
      9784860437060
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Book] Conprehensive Coordination Chemistry 32021

    • Author(s)
      Shinobu Itoh and Hiroshi Fujii
    • Total Pages
      1000
    • Publisher
      Elsevier
    • ISBN
      9780081026885
    • Related Report
      2020 Research-status Report
  • [Book] CSJカレントレビュー2020

    • Author(s)
      伊東 忍
    • Total Pages
      200
    • Publisher
      化学同人
    • ISBN
      9784759813968
    • Related Report
      2020 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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