干生命:理解前生物-生物过渡的框架》(A Framework for Understanding the Prebiotic-Biotic Transition)。

IF 2.1 3区 生物学 Q4 BIOCHEMISTRY & MOLECULAR BIOLOGY
Journal of Molecular Evolution Pub Date : 2024-10-01 Epub Date: 2024-09-08 DOI:10.1007/s00239-024-10201-z
Gregory P Fournier
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引用次数: 0

摘要

人们经常把生物起源设想为一个由日益复杂的化学系统组成的阶梯式线性发展过程,最终导致现存细胞生命的祖先。这种 "前类比学 "观点与古生物学和系统进化论中广为接受的生物进化生物学原理形成了鲜明对比。将这一观点应用于起源,我探讨了 "干生命 "范式,它将生物起源纳入遗传系和化学系统多样化和灭绝的更广泛连续性之中。在这一新范式中,现存生命的祖先血统与许多其他复杂的前生物化学系统同时出现,并依赖于它们,是一个多样而丰富的前生物圈的一部分。通过对自然史的类比,我展示了这种视角的转变如何丰富了我们对起源的理解,并直接启发了关于生命定义、最后宇宙共同祖先(LUCA)的出现以及前生物化学实验的意义等问题的讨论。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Stem Life: A Framework for Understanding the Prebiotic-Biotic Transition.

Stem Life: A Framework for Understanding the Prebiotic-Biotic Transition.

Abiogenesis is frequently envisioned as a linear, ladder-like progression of increasingly complex chemical systems, eventually leading to the ancestors of extant cellular life. This "pre-cladistics" view is in stark contrast to the well-accepted principles of organismal evolutionary biology, as informed by paleontology and phylogenetics. Applying this perspective to origins, I explore the paradigm of "Stem Life," which embeds abiogenesis within a broader continuity of diversification and extinction of both hereditary lineages and chemical systems. In this new paradigm, extant life's ancestral lineage emerged alongside and was dependent upon many other complex prebiotic chemical systems, as part of a diverse and fecund prebiosphere. Drawing from several natural history analogies, I show how this shift in perspective enriches our understanding of Origins and directly informs debates on defining Life, the emergence of the Last Universal Common Ancestor (LUCA), and the implications of prebiotic chemical experiments.

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来源期刊
Journal of Molecular Evolution
Journal of Molecular Evolution 生物-进化生物学
CiteScore
5.50
自引率
2.60%
发文量
36
审稿时长
3 months
期刊介绍: Journal of Molecular Evolution covers experimental, computational, and theoretical work aimed at deciphering features of molecular evolution and the processes bearing on these features, from the initial formation of macromolecular systems through their evolution at the molecular level, the co-evolution of their functions in cellular and organismal systems, and their influence on organismal adaptation, speciation, and ecology. Topics addressed include the evolution of informational macromolecules and their relation to more complex levels of biological organization, including populations and taxa, as well as the molecular basis for the evolution of ecological interactions of species and the use of molecular data to infer fundamental processes in evolutionary ecology. This coverage accommodates such subfields as new genome sequences, comparative structural and functional genomics, population genetics, the molecular evolution of development, the evolution of gene regulation and gene interaction networks, and in vitro evolution of DNA and RNA, molecular evolutionary ecology, and the development of methods and theory that enable molecular evolutionary inference, including but not limited to, phylogenetic methods.
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