Global regulation by the seven-component Pi signaling system.

Global regulation by the seven-component Pi signaling system.
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DOI:
10.1016/j.mib.2010.01.014
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发表时间:
2010-04
影响因子:
5.4
通讯作者:
Wanner, Barry L.
Wanner, Barry L.
中科院分区:
生物学2区
文献类型:
--
作者:
Hsieh, Yi-Ju;Wanner, Barry L.

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本文综述了大肠杆菌如何通过PhoR/PhoB双组分系统(TCS)检测环境无机正磷酸盐(Pi)来调控磷酸盐(Pho)调节子基因。PhoR/PhoB TCS的Pi控制是细菌信号转导途径的范例,其中细胞表面受体的占据控制细胞质中的基因表达。Pi信号通路需要七种蛋白质,所有这些蛋白质可能在膜相关信号复合物中相互作用。我们最新的研究表明,Pi信号涉及三个不同的过程,这似乎对应于感觉组氨酸激酶PhoR的不同状态:抑制状态,激活状态和失活状态。我们描述了一个修正的模型,Pi的信号转导的E。coli Pho调节子。
This review concerns how Escherichia coli detects environmental inorganic orthophosphate (Pi) to regulate genes of the phosphate (Pho) regulon by the PhoR/PhoB two-component system (TCS). Pi control by the PhoR/PhoB TCS is a paradigm of a bacterial signal transduction pathway in which occupancy of a cell surface receptor(s) controls gene expression in the cytoplasm. The Pi signaling pathway requires seven proteins, all of which probably interact in a membrane-associated signaling complex. Our latest studies show that Pi signaling involves three distinct processes, which appear to correspond to different states of the sensory histidine kinase PhoR: an inhibition state, an activation state, and a deactivation state. We describe a revised model for Pi signal transduction of the E. coli Pho regulon.
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