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Constructing an RNA self-replication system through peptide structuring

Research Project

Project/Area Number 20K14599
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 17050:Biogeosciences-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Li Peiying  国立研究開発法人理化学研究所, 生命機能科学研究センター, 研究員 (00862062)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords生命の起源 / リボザイム / ペプチド / 自己集合 / 自己集合ペプチド / 液-液相分離
Outline of Research at the Start

初期生命がどうのように誕生したかは生物学における最も大きな謎の1つである.これまでに発見された単純な正電荷ペプチドがRNA酵素(リボザイム)の活性を促進することにより,初期生命においても単純なペプチドがRNAワールドの進化を促進した可能性を示した.本研究では,自己集合することでRNAとの結合を自己調整するペプチド配列を設計し,リボザイムの活性制御を行う.これにより,RNAとペプチドによる自己複製システムを構築し,初期生命においてペプチド・RNAの共進化がもたらした優位性を理解する.

Outline of Final Research Achievements

In this study, we investigated the effects of simple peptides capable of forming aggregate structures via self-assembly on ribozyme activity, with the aim of understanding the co-evolution between RNA and peptide on early earth. As a result, we found that simple cationic peptides with hydrophobic domain can self-assemble and form solid aggregates containing amyloid structures. These aggregates can concentrate RNAs on their surface and enhance the activity of bound ribozymes. Furthermore, we found that the ribozyme activity is affected by the sequence of the self-assembling peptide and salt concentration. Such simple peptides may have played a beneficial role in supporting ribozymes under conditions with various salt concentrations on early earth.

Academic Significance and Societal Importance of the Research Achievements

現代の生命では核酸やタンパク質を含む多くの分子種が協調してそのシステムを構築しているが,そのような複雑な系が如何に誕生し,進化してきたのかは生命を理解するための本質な問いである.本研究では複数分子種が存在する環境下でのRNA自己複製の実現に向けて,単純なペプチドの構造化とその機能に着目し,RNAとの共存の際にリボザイム活性にどのような影響を与えるかを明らかにした.本研究では,核酸結合性のペプチドが自己集合して構造化することが生命誕生に必須であった可能性を示し,そこからさらにより複雑な構造・機能をもったタンパク質が進化してきたことの説明にもつながる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (1 results)

  • [Int'l Joint Research] MRC Laboratory of Molecular Biology(英国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] MRC Laboratory of Molecular Biology(英国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] The origin of life: RNA and protein co‐evolution on the ancient Earth2023

    • Author(s)
      Tagami Shunsuke、Li Peiying
    • Journal Title

      Development, Growth & Differentiation

      Volume: 65 Issue: 3 Pages: 167-174

    • DOI

      10.1111/dgd.12845

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hydrophobic-cationic peptides modulate RNA polymerase ribozyme activity by accretion2022

    • Author(s)
      Li Peiying、Holliger Philipp、Tagami Shunsuke
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41467-022-30590-3

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Peptides for the RNA-based biology: Regulating ribozyme function through self-assembly2023

    • Author(s)
      Li Peiying、Holliger Philipp、Tagami Shunsuke
    • Organizer
      Origins2023, ISSOL-IAU Astrobiology Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Peptides for the RNA-based biology:Regulation of the RNA polymerase ribozyme function via self-assembly2023

    • Author(s)
      Li Peiying、Holliger Philipp、Tagami Shunsuke
    • Organizer
      第47回生命の起原および進化学会学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] 初期地球におけるRNA-ペプチド共進化の再現:カチオン性自己集合ペプチドによるリボザイムの活性コントロール2022

    • Author(s)
      Li Peiying、Holliger Philipp、Tagami Shunsuke
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] RNAとペプチドの共進化を探る-自己集合ペプチドによるリボザイムの活性コントロール-2022

    • Author(s)
      Peiying Li, Philipp Holliger, Shunsuke Tagami
    • Organizer
      第46回生命の起原および進化学会学術講演会
    • Related Report
      2021 Research-status Report
  • [Remarks] ペプチドとRNAの出会いが生命を生んだ?

    • URL

      https://www.riken.jp/press/2022/20220603_1/index.html

    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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