3jyb | pdb_00003jyb

Crystal Structure of the RetS periplasmic domain

spinqualitylabelsall models 3jyb, resolution 2.04Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3jyb is a 2 chain structure with sequence from Pseab. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: MSE Gene: PA14_64230, PA4856, retS, rets (AMINO ACIDS 41 - 185) (PSEAB) Activity: Histidine kinase, with EC number 2.7.13.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 PubMed The opportunistic pathogen Pseudomonas aeruginosa may cause both acute and chronic-persistent infections in predisposed individuals. Acute infections require the presence of a functional type III secretion system (T3SS), whereas chronic P. aeruginosa infections are characterized by the formation of drug-resistant biofilms. The T3SS and biofilm formation are reciprocally regulated by the signaling kinases LadS, RetS, and GacS. RetS downregulates biofilm formation and upregulates expression of the T3SS through a unique mechanism. RetS forms a heterodimeric complex with GacS and thus prevents GacS autophosphorylation and downstream signaling. The signals that regulate RetS are not known but RetS possesses a distinctive periplasmic sensor domain that is believed to serve as receptor for the regulatory ligand. We have determined the crystal structure of the RetS sensory domain at 2.0 A resolution. The structure closely resembles those of carbohydrate binding modules of other proteins, suggesting that the elusive ligands are likely carbohydrate moieties. In addition to the conserved beta-sandwich structure, the sensory domain features two alpha helices which create a unique surface topology. Protein-protein crosslinking and fluorescence energy transfer experiments also revealed that the sensory domain dimerizes with a dissociation constant of K(d) = 580 +/- 50 nM, a result with interesting implications for our understanding of the underlying signaling mechanism. Proteins 2010. (c) 2010 Wiley-Liss, Inc. Crystal structure and oligomeric state of the RetS signaling kinase sensory domain.,Jing X, Jaw J, Robinson HH, Schubot FD Proteins. 2009 Dec 21. PMID:20112417 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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