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首页> 外文会议>Instruments, methods, and missions for astrobiology XIV >The Evolutionary History of the Ribosome and its Relevance to the Search for Life Elsewhere in the Universe
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The Evolutionary History of the Ribosome and its Relevance to the Search for Life Elsewhere in the Universe

机译：核糖体的进化史及其与在宇宙中其他地方寻找生命的相关性

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Evidence pertaining to the evolutionary history of the ribosome is reviewed and is discussed in the context of the origin of life as we know it on the Earth. The implications for the search for life elsewhere are also discussed. If extraterrestrial life is found that has complex protein synthesis machinery, it will be of interest to determine if it represents a second genesis of life. It is argued that a comparison with the translation machinery of Earth life will be able to resolve the issue. If such extraterrestrial life were concluded to have arisen from the same genesis as Earth life, then examination of the ribosomal RNAs will provide further insight. In particular, it would in many scenarios be possible to determine how recently an organism found on another body such as Mars had been transferred to or from the Earth. Thus, forward contamination could be distinguished from interplanetary transfer.
机译：关于核糖体进化历史的证据已被审查，并在我们在地球上知道的生命起源的背景下进行了讨论。还讨论了寻找其他地方生命的意义。如果发现具有复杂的蛋白质合成机制的地外生命，那么确定它是否代表生命的第二世代将很有意义。有人认为，与地球生命的翻译机制进行比较可以解决这个问题。如果得出这样的地外生命是与地球生命起源相同的结论，那么核糖体RNA的检查将提供进一步的见解。特别是，在许多情况下，有可能确定在另一个物体（如火星）上发现的生物最近是如何转移到地球或从地球转移的。因此，前向污染可以与行星际转移区分开。

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