Department of Physics, Carl R. Woese Institute for Genomic Biology, University of Illinois, Urbana, IL, 61801, USA.
Planetary Chemistry and Astrobiology, Sec. 3225 MS:183-301, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109-8099, USA.
Bioessays. 2018 Aug;40(8):e1700182. doi: 10.1002/bies.201700182. Epub 2018 Jul 4.
We argued in Part 1 of this series that because all living systems are extremely far-from-equilibrium dynamic confections of matter, they must necessarily be driven to that state by the conversion of chemically specific external disequilibria into specific internal disequilibria. Such conversions require task-specific macromolecular engines. We here argue that the same is not only true of life at its emergence; it is the enabling cause of that emergence; although here the external driving disequilibria, and the conversion engines needed must have been abiotic. We argue further that the initial step in life's emergence can only create an extremely simple non-equilibrium "seed" from which all the complexity of life must then develop. We assert that this complexity develops incrementally and progressively, each step tested for value added "in flight." And we make the case that only the submarine alkaline hydrothermal vent (AHV) model has the potential to satisfy these requirements.
我们在本系列的第 1 部分中指出,由于所有生命系统都是由物质构成的、远离平衡的动态组合体,它们必然会通过将化学特异性的外部不平衡转化为特定的内部不平衡来达到这种状态。这种转化需要特定任务的大分子引擎。我们在这里认为,这不仅适用于生命的起源,而且是生命起源的促成因素;尽管这里的外部驱动不平衡和所需的转化引擎必须是无生命的。我们进一步认为,生命起源的初始步骤只能从极其简单的非平衡“种子”中创造出来,而生命的所有复杂性都必须从这个种子中发展出来。我们断言,这种复杂性是逐步递增的,每一步都在“飞行中”测试附加值。我们还提出了这样一种观点,即只有海底碱性热液喷口 (AHV) 模型有可能满足这些要求。