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Switchable Catalytic Function in a Designer Protein System Reminiscent of Biosignal Transduction

Planned Research

Project AreaSuperior Protein Engineering by Evolution and Design
Project/Area Number 21H05118
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (II)
Research InstitutionNational Institutes of Natural Sciences (2023-2024)
Tohoku University (2021-2022)

Principal Investigator

Okamoto Yasunori  大学共同利用機関法人自然科学研究機構(機構直轄研究施設), 生命創成探究センター, 准教授 (50843405)

Project Period (FY) 2021-08-23 – 2024-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥42,510,000 (Direct Cost: ¥32,700,000、Indirect Cost: ¥9,810,000)
Fiscal Year 2023: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2022: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2021: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Keywords人工金属酵素 / タンパク質工学
Outline of Research at the Start

生体内では複数のタンパク質が連携することで生命機能システム (エネルギー変換やシグナル伝達など) が動作している。近年、この生命機能システムを再設計し、望みの機能を発現する細胞の構築をめざす合成生物学的研究が精力的に進められている。では、生命機能システムの構成要素の一つであるタンパク質のみで同様のタスクを実行可能な高次機能性タンパク質の構築は可能だろうか?これに対するProof-of-Conceptとして本研究では人工金属酵素と天然酵素の機能がリレーするタンパク質複合体を構築し、生体内情報分子の変換システムの構築をめざす。

Outline of Final Research Achievements

In biological systems, proteins undergo structural changes in response to external signals and are linked to catalytic functions. In this research, we aimed to create an artificial enzyme with environmentally responsive catalytic activity.
Using a modular domain that forms a β-roll structure with specific ions, we designed and constructed a catalytic center in the region of structural change. We conducted iterative mutations across the template protein surface, using each outcome to refine our design approach. This process eventually yielded the essential structural platform necessary to achieve our ultimate objective. Although there were challenges in realizing catalytic activity modulation triggered by the structural transformation, we were able to gain important insights into design principles.

Academic Significance and Societal Importance of the Research Achievements

本研究は、生体内のシグナル伝達に着想を受け、外部シグナルに応答して触媒機能のオン・オフを切り替える人工酵素の設計原理の確立をめざすものである。このような高次機能性タンパク質を自在に設計する技術が実現すれば、環境変化に応答して機能する生体分子ロボットやバイオセンサーなど医薬応用の面でライフサイエンスに貢献する技術となるだけでなく、材料科学に貢献する新たなインテリジェントバイオマテリアルの創生に寄与する可能性がある。

Report

(4 results)
  • 2024 Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (10 results)

All 2024 2023 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 9 results)

  • [Journal Article] Switching Type I/Type II Reactions by Turning a Photoredox Catalyst into a Photo-Driven Artificial Metalloenzyme2023

    • Author(s)
      Okamoto Yasunori、Mabuchi Takuya、Nakane Keita、Ueno Akiko、Sato Shinichi
    • Journal Title

      ACS Catalysis

      Volume: 13 Issue: 7 Pages: 4134-4141

    • DOI

      10.1021/acscatal.2c05946

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Artificial enzyme for biochemical applications2024

    • Author(s)
      Yasunori Okamoto
    • Organizer
      Korea-Japan Symposium on Molecular Science
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Regulating the reactivity of a synthetic metal complex by a protein matrix for biochemical applications2024

    • Author(s)
      Yasunori Okamoto
    • Organizer
      2024 Frontier Bioorganization Forum
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Employing Artificial Metalloenzymes in Biochemical Contexts.2023

    • Author(s)
      Yasunori Okamoto
    • Organizer
      錯体化学会第73回討論会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 人工金属酵素: タンパク質への非天然機能付与を目的としたタンパク質工学と錯体化学の融合的アプローチ2023

    • Author(s)
      岡本泰典
    • Organizer
      第23回日本蛋白質科学会年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 人工金属酵素を用いた触媒システムの構築2022

    • Author(s)
      岡本 泰典
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 人工金属酵素の開発と生化学的応用2022

    • Author(s)
      岡本 泰典
    • Organizer
      メタルバイオサイエンス研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Regulation of gene expression by an artificial metalloenzyme2022

    • Author(s)
      Yasunori Okamoto
    • Organizer
      Korea-Japan Joint Workshop on Biofunctional Chemistry
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 生化学的応用を志向した人工金属酵素の開発2022

    • Author(s)
      岡本泰典
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Regulation of a cellular function by an abiotic catalysis2021

    • Author(s)
      Yasunori Okamoto
    • Organizer
      FRIS-KKU Joint Virtual Workshop
    • Related Report
      2021 Annual Research Report
    • Invited

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Published: 2021-10-22   Modified: 2026-01-16  

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