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From Proteopedia
CHEY-BINDING DOMAIN OF CHEA IN COMPLEX WITH CHEY
Structural highlights
FunctionCHEY_ECOLI Involved in the transmission of sensory signals from the chemoreceptors to the flagellar motors. In its active (phosphorylated or acetylated) form, CheY exhibits enhanced binding to a switch component, FliM, at the flagellar motor which induces a change from counterclockwise to clockwise flagellar rotation. Overexpression of CheY in association with MotA and MotB improves motility of a ycgR disruption, suggesting there is an interaction (direct or indirect) between the c-di-GMP-binding flagellar brake protein and the flagellar stator.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBacterial adaptation to the environment is accomplished through the coordinated activation of specific sensory receptors and signal processing proteins. Among the best characterized of these pathways are those which employ the two-component paradigm. In these systems, signal transmission is mediated by Mg(2+)-dependent phospho-relay reactions between histidine auto-kinases and phospho-accepting receiver domains in response-regulator proteins. Although this mechanism of activation is common to all response-regulators, detrimental cross-talk between different two-component pathways within the same cell is minimized through the use of specific recognition domains. Here, we report the crystal structure, at 2.95 A resolution, of the response regulator of bacterial chemotaxis, CheY, bound to the recognition domain from its cognate histidine kinase, CheA. The structure suggests that molecular recognition, in this low affinity complex (KD = 2 microM), may also contribute to the mechanism of CheY activation. Structure of the CheY-binding domain of histidine kinase CheA in complex with CheY.,Welch M, Chinardet N, Mourey L, Birck C, Samama JP Nat Struct Biol. 1998 Jan;5(1):25-9. PMID:9437425[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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