The physical basis and practical consequences of biological promiscuity.

The physical basis and practical consequences of biological promiscuity.
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DOI:
10.1088/1478-3975/ab8697
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发表时间:
2020-04-03
期刊:
影响因子:
2
通讯作者:
--
中科院分区:
生物学4区
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--
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蛋白质与代谢物、核酸和其他蛋白质相互作用,协调无数的催化、结构和调节功能,支持从最简单的微生物到最复杂的多细胞生物的生命。这些分子间的相互作用通常是非常具体的,但从来都不是完美的。由于细胞中成千上万的大分子和小分子挤在一起,所以偶然的“混杂”相互作用无处不在。这种相互作用可能会在分子水平上扰乱蛋白质的功能,但只要它们不损害有机体的适应性,它们就不会被自然选择所消除。尽管混杂相互作用在生理学上是无关的,但它们很重要,因为它们可以提供大量潜在功能,可以为自然界和实验室中新功能的进化提供起点。
Proteins interact with metabolites, nucleic acids, and other proteins to orchestrate the myriad catalytic, structural and regulatory functions that support life from the simplest microbes to the most complex multicellular organisms. These molecular interactions are often exquisitely specific, but never perfectly so. Adventitious “promiscuous” interactions are ubiquitous due to the thousands of macromolecules and small molecules crowded together in cells. Such interactions may perturb protein function at the molecular level, but as long as they do not compromise organismal fitness, they will not be removed by natural selection. Although promiscuous interactions are physiologically irrelevant, they are important because they can provide a vast reservoir of potential functions that can provide the starting point for evolution of new functions, both in nature and in the laboratory.
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