A Bacterial Tower of Babel: Quorum-Sensing Signaling Diversity and Its Evolution.

A Bacterial Tower of Babel: Quorum-Sensing Signaling Diversity and Its Evolution.
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DOI:
10.1146/annurev-micro-012220-063740
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发表时间:
2020-09-08
影响因子:
10.5
通讯作者:
Eldar A
Eldar A
中科院分区:
生物学1区
文献类型:
--
作者:
Aframian N;Eldar A

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群体感应是细菌分泌和感知可扩散分子的过程,从而使细菌群以密度依赖的方式协调其行为。群体感应已经独立地进化了多次,利用不同的分子途径和信号分子。在许多群体感应家族中,一个共同的主题是它们广泛的信号多样性-家族中的不同变体编码不同的信号分子,每种变体具有特定的同源受体。这种巨大的等位基因多态性模式提出了几个问题——不同的信号变体是如何相互作用的?这种多样性是如何保持的?它最初是如何出现的?在这里,我们认为信号变体之间的社会相互作用可以解释信号多样性在进化过程中的出现和持续。最后,我们将讨论扩展到包括多个不同系统在单个细菌中协同工作的情况。
Quorum sensing is a process in which bacteria secrete and sense a diffusible molecule, thereby enabling bacterial groups to coordinate their behavior in a density-dependent manner. Quorum sensing has evolved multiple times independently, utilizing different molecular pathways and signaling molecules. A common theme among many quorum-sensing families is their wide range of signaling diversity—different variants within a family code for different signal molecules with a cognate receptor specific to each variant. This pattern of vast allelic polymorphism raises several questions—How do different signaling variants interact with one another? How is this diversity maintained? And how did it come to exist in the first place? Here we argue that social interactions between signaling variants can explain the emergence and persistence of signaling diversity throughout evolution. Finally, we extend the discussion to include cases where multiple diverse systems work in concert in a single bacterium.
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