REALISTIC LIFE-LIKE SYSTEMS CONSISTING OF RNA UNDER THE HYDROTHERMAL ENVIRONMENTS ON PRIMITIVE EARTH

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  • Kawamura Kunio
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University

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  • 前生物的化学に基づいてRNAワールド仮説を検証する
  • ゼンセイブツテキ カガク ニ モトズイテ RNA ワールド カセツ オ ケンショウ スル

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<p>The RNA world hypothesis, which is becoming a most popular hypothesis, has been extensively evaluated in the last two decays. However, this hypothesis has some drawbacks. First, the hypothesis that life originated near hydrothermal vent environments (the hydrothermal origin-of-life hypothesis) appears to be inconsistent with the RNA world hypothesis. In our group, the thermal stability, the chemical evolution, and the behaviors on RNA molecules under hydrothermal conditions were systematically investigated using our monitoring methods for rapid hydrothermal reactions. Based on these empirical data, the RNA world hypothesis is discussed from the viewpoint of the hydrothermal origin-of-life hypothesis and different plausible RNA world systems are proposed. Second, the reality of the RNA world in detail is still ambiguous. Thus, several plausible RNA worlds are evaluated as life-like systems on the basis of the unified theory regarding the origin-of-life and evolution of organisms, which was recently established in our group.</p>

Journal

  • Viva Origino

    Viva Origino 37 (3), 31-42, 2009

    The Society for the Study of the Origin and Evolution of Life Japan

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