FORMATION OF AMINO ACID CONDENSATES PARTLY HAVING PEPTIDE BONDS IN A SIMULATED SUBMARINE HYDROTHERMAL ENVIRONMENT

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  • Chandru Kuhan
    Department of Chemistry, Graduate School and Faculty of Engineering, Yokohama National University
  • Obayashi Yumiko
    Department of Chemistry, Graduate School and Faculty of Engineering, Yokohama National University
  • Kaneko Takeo
    Department of Chemistry, Graduate School and Faculty of Engineering, Yokohama National University
  • Kobayashi Kensei
    Department of Chemistry, Graduate School and Faculty of Engineering, Yokohama National University

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<p>  Although abiotic polymerization of amino acids is an important step in origin of life study, it has often eluded that their formation could be limited in the hydrothermal systems. To show this we heated an aqueous solution of several amino acids in a simulated hydrothermal environment to assess the possible formation of peptides among the heated products. Peptide concentrations estimated by the Lowry method were significantly higher when the mixture was heated at 300℃ than those at lower temperatures, despite having more than 80% of the initial amino acids decomposed. We also revealed that the peptides measured here were only part of the bonds in the heated products. The major heat products were non-peptide amino acid condensates (NPACs) that only possess partial peptide bonds. The role of NPACs should be examined though they were often ignored in the classical chemical evolution scenario so far.</p>

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  • Viva Origino

    Viva Origino 41 (3), 24-28, 2013

    生命の起原および進化学会

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