フォスフォン酸のプラズビオティックなプレビオティック合成である

R M de Graaf¹, J Visscher, A W Schwartz

¹Faculty of Science, University of Nijmegen, The Netherlands.

Nature

|November 30, 1995

まとめ

隕石に含まれるアルキルフォスフォニック酸は,初期の地球に重要なリン化合物を供給していた可能性がある. これらの水溶性分子は,核酸のような初期の遺伝物質の先駆者であったかもしれない.

科学分野:

天体生物学アストロバイオロジー
有機化学オーガニック・ケミストリー
プレビオティック化学プレビオティック化学

背景:

リン酸カルシウムの不溶性は,生命の起源の理解を妨げています.
マーチソン隕石で発見されたアルキルフォスフォニック酸は,潜在的な解決策を提供します.
これらの分子は水溶性であり,初期の化学的進化に不可欠なリンを含んでいます.

研究の目的:

アルキルフォスフォニック酸のプレバイオティック合成を調査する.
隕石や彗星がこれらの化合物を初期の地球に届ける可能性のある役割を調査する.
初期の遺伝子分子の前駆体としてのフォスフォン酸を評価する.

主な方法:

紫外線照射によるフォスフォン酸の合成.
オートホスフォルス酸をホルムアルデヒド,アルコール,アセトンで利用する.
隕石で見つかったものを含む反応産物の分析.

主要な成果:

マーチソン隕石で最も豊富に存在するものを含め,いくつかのフォスフォン酸の合成に成功しました.
単純な前体に対する紫外線照射によってこれらの化合物が得られることが実証された.
地球外での発送または地球上のリン酸の合成を支持する証拠.

結論:

アルキルフォスフォン酸は,隕石や彗星によって初期の地球に届いた可能性がある.
これらの化合物は,生命の初期に核酸の前駆体として機能した可能性がある.
特定された合成経路は,初期の地球と隕石の両方でその存在を説明する可能性がある.

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