A Symphony of Cyclases: Specificity in Diguanylate Cyclase Signaling.

A Symphony of Cyclases: Specificity in Diguanylate Cyclase Signaling.
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DOI:
10.1146/annurev-micro-090816-093325
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发表时间:
2017-09-08
影响因子:
10.5
通讯作者:
O'Toole GA
O'Toole GA
中科院分区:
生物学1区
文献类型:
--
作者:
Dahlstrom KM;O'Toole GA

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环二鸟酸酯(c-di-GMP)是一种几乎通用的信号分子,由二鸟苷环化酶产生,可指导细菌的多种行为。在过去的几年里,一个主要的研究领域旨在了解一个具有数十个二鸟苷晚期环化酶的细胞如何部署其中一个给定的子集,以产生所需的表型结果,而不会在c-di-GMP依赖的系统之间产生不希望看到的串扰。已经提出了几个模型来解决这个问题,包括环化酶激活的特异性,调节的效应蛋白结合常数,以及环化酶和效应物之间的物理相互作用。此外,最近的证据表明,环化酶的催化状态与其与效应器的物理接触之间可能存在联系。这篇综述重点介绍了几项关键的研究,检查了拟议的细菌中c-di-GMP信号特异性的全球和局部模型,并试图确定可以采取的最有成效的步骤,以更好地理解兄弟姐妹周期酶和效应器蛋白的动态网络如何导致控制细胞行为的合理输出。
Cyclic diguanylate (c-di-GMP) is a near universal signaling molecule produced by diguanylate cyclases that can direct a variety of bacterial behaviors. A major area of research over the last several years has been aimed at understanding how a cell with dozens of diguanylate cyclases can deploy a given subset of them to produce a desired phenotypic outcome without undesired cross talk between c-di-GMP-dependent systems. Several models have been put forward to address this question, including specificity of cyclase activation, tuned binding constants of effector proteins, and physical interaction between cyclases and effectors. Additionally, recent evidence has suggested that there may be a link between the catalytic state of a cyclase and its physical contact with an effector. This review highlights several key studies, examines the proposed global and local models of c-di-GMP signaling specificity in bacteria, and attempts to identify the most fruitful steps that can be taken to better understand how dynamic networks of sibling cyclases and effector proteins result in sensible outputs that govern cellular behavior.
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