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ring the potential for amino acid polymerization and asymmetric amplification inside ice planets

Research Project

Project/Area Number 21K18643
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

KAGI HIROYUKI  東京大学, 大学院理学系研究科(理学部), 教授 (70233666)

Co-Investigator(Kenkyū-buntansha) 三村 耕一  名古屋大学, 環境学研究科, 教授 (80262848)
奈良 雅之  東京医科歯科大学, 教養部, 教授 (90301168)
Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywordsアミノ酸 / 高圧 / 重合 / 不斉濃縮 / 不斉増幅 / 氷
Outline of Research at the Start

我々は、ホモキラリティが氷惑星・衛星内部の高圧環境でアミノ酸が重合する過程でもたらされた不斉増幅に起因するのではないかと言う仮説を持っている。本研究の目的はこの仮説を実験と分子シミュレーションの併用によって、証明することにある。高圧下でのアミノ酸の重合反応では、大きな立体障害によって著しい不斉増幅が起こる可能性が高い。そこで我々は、アミノ酸の種類と配列によっては、L体が選択されていく条件があるのではないかという発想に至った。本計画ではL体が濃縮する配列を網羅的、かつ分子シミュレーションに基づいて戦略的に見いだし、ホモキラリティの起源について従来にない全く新しい可能性を提案するものである。

Outline of Final Research Achievements

Amino acids are the basic building blocks of proteins. We have found that amino acids dehydrate and condense under high pressure at room temperature to form long-chain peptides. Under relatively low temperature conditions near room temperature, polymerisation reactions are expected to occur with preserved optical activity, as racemisation does not proceed. Noting that the amino acids in the meteorite have an excess of L-body, the possibility of asymmetric enrichment of the L-body during apolymerisation under high pressure was investigated. In this study, the sequence of optical isomers constituting the dimer and trimer of amino acids was rigorously determined and a method was developed to quantitatively assess asymmetric enrichment.

Academic Significance and Societal Importance of the Research Achievements

ホモキラリティの起源を知る目的で、高圧下でのアミノ酸の重合過程における不斉濃縮の可能性を検討した。ペプチド(ただし3量体まで)のアミノ酸の配列を光学異性体を含めて解析する手法を確立することができた。これまでの結果では、アミノ酸の重合過程で有意に多く生成する三量体も見られており、何らかの不斉濃縮が起こった可能性は残されている。
高圧下での重合反応は環境に負荷がかかる触媒を必要とせず、室温で進行するため光学異性体が保存されるため、医薬品の合成などに応用が可能かも知れない。

Report

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

    (10 results)

All 2023 2022 2021 Other

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (4 results) Remarks (1 results)

  • [Journal Article] The hydrogen-bond network in sodium chloride tridecahydrate: analogy with ice VI2023

    • Author(s)
      Yamashita Keishiro、Nakayama Kazuya、Komatsu Kazuki、Ohhara Takashi、Munakata Koji、Hattori Takanori、Sano-Furukawa Asami、Kagi Hiroyuki
    • Journal Title

      Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials

      Volume: 79 Issue: 5 Pages: 414-426

    • DOI

      10.1107/s2052520623007199

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Temperature dependence of nitrogen solubility in bridgmanite and evolution of nitrogen storage capacity in the lower mantle2023

    • Author(s)
      Fukuyama Ko、Kagi Hiroyuki、Inoue Toru、Kakizawa Sho、Shinmei Toru、Sano Yuji、Deligny C?cile、F?ri Evelyn
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 3537-3537

    • DOI

      10.1038/s41598-023-30556-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Crystal structure of potassium chloride monohydrate: water intercalation into the B1 structure of KCl under high pressure2022

    • Author(s)
      Yamashita Keishiro、Komatsu Kazuki、Kagi Hiroyuki
    • Journal Title

      Acta Crystallographica Section C Structural Chemistry

      Volume: 78 Issue: 12 Pages: 749-754

    • DOI

      10.1107/s2053229622011135

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Atomic distribution and local structure in ice VII from in situ neutron diffraction2022

    • Author(s)
      Yamashita Keishiro、Komatsu Kazuki、Klotz Stefan、Fabelo Oscar、Fern?ndez-D?az Maria T.、Abe Jun、Machida Shinichi、Hattori Takanori、Irifune Tetsuo、Shinmei Toru、Sugiyama Kazumasa、Kawamata Toru、Kagi Hiroyuki
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 40 Pages: 121-135

    • DOI

      10.1073/pnas.2208717119

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unexpectedly Rigid Short Peptide Foldamers in which NH-p and CH-p Interactions are Reserved in Solution Luhan Zhai, Masayuki Nara, Yuko Otani, Tomohiko Ohwada2021

    • Author(s)
      Luhan Zhai, Masayuki Nara, Yuko Otani, Tomohiko Ohwada
    • Journal Title

      Chemical Communications

      Volume: 57 (67) Issue: 67 Pages: 8344-8347

    • DOI

      10.1039/d1cc02998c

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 光学異性体を含んだアラニン2量体及び3量体の異性体分析2023

    • Author(s)
      鍵 裕之
    • Organizer
      日本質量分析学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ATR-FTIRによる合成ペプチドアナログの構造解析―配位子置換がCa2+配位構造に及ぼす影響2023

    • Author(s)
      奈良雅之、森井尚之、坂本章、宮川拓也、田之倉優
    • Organizer
      日本化学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] キラルカラムを用いたLC-MSによるアラニン二量体、三量体の異性体分析2022

    • Author(s)
      秋本 篤弥、鍵 裕之、森井 尚之、奈良 雅之
    • Organizer
      日本分析化学会 第71年会
    • Related Report
      2022 Research-status Report
  • [Presentation] D, L-アラニンの圧力誘起オリゴマー化過程での不斉増幅の検討2022

    • Author(s)
      秋本 篤弥、鍵 裕之、森井 尚之、奈良 雅之
    • Organizer
      日本地球化学会 第69回年会
    • Related Report
      2022 Research-status Report
  • [Remarks]

    • URL

      http://www.eqchem.s.u-tokyo.ac.jp

    • Related Report
      2023 Annual Research Report

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Published: 2021-07-13   Modified: 2025-01-30  

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