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THE TWO-COMPONENT SIGNALING PATHWAY OF BACTERIAL CHEMOTAXIS: A Molecular View of Signal Transduction by Receptors Kinases and Adaptation Enzymes

机译:细菌趋化因子的两种成分的信号通路:受体激酶和适应酶信号转导的分子观。

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摘要

The chemosensory pathway of bacterial chemotaxis has become a paradigm for the two-component superfamily of receptor-regulated phosphorylation pathways. This simple pathway illustrates many of the fundamental principles and unanswered questions in the field of signaling biology. A molecular description of pathway function has progressed rapidly because it is accessible to diverse structural, biochemical, and genetic approaches. As a result, structures are emerging for most of the pathway elements, biochemical studies are elucidating the mechanisms of key signaling events, and genetic methods are revealing the intermolecular interactions that transmit information between components. Recent advances include (a) the first molecular picture of a conformational transmembrane signal in a cell surface receptor, (b) four new structures of kinase domains and adaptation enzymes, and (c) significant new insights into the mechanisms of receptor-mediated kinase regulation, receptor adaptation, and the phospho-activation of signaling proteins. Overall, the chemosensory pathway and the propulsion system it regulates provide an ideal system in which to probe molecular principles underlying complex cellular signaling and behavior.
机译:细菌趋化性的化学感应途径已成为受体调节的磷酸化途径的两组分超家族的范例。这种简单的途径说明了信号生物学领域的许多基本原理和未解决的问题。途径功能的分子描述已迅速发展,因为它可用于多种结构,生化和遗传方法。结果,大多数通路元素的结构正在出现,生化研究正在阐明关键信号事件的机制,遗传方法揭示了在组分之间传递信息的分子间相互作用。最近的进展包括(a)细胞表面受体中构象跨膜信号的第一张分子图片,(b)激酶结构域和适应酶的四个新结构,以及(c)对受体介导的激酶调节机制的重要新见解,受体适应性和信号蛋白的磷酸化激活。总体而言,化学感觉途径及其调节的推进系统提供了一个理想的系统,可在其中探索潜在的复杂细胞信号传导和行为的分子原理。

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