5lt9

Evolution of paralogous chemoreceptors with similar chemoattractant profiles

spinqualitylabelsall models 5lt9, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5lt9 is a 2 chain structure with sequence from "bacillus_aeruginosus"_(schroeter_1872)_trevisan_1885 "bacillus aeruginosus" (schroeter 1872) trevisan 1885. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ARG, GOL, NA Related: 5t65, 5t7m Gene: pctB_2, AOY09_01347 ("Bacillus aeruginosus" (Schroeter 1872) Trevisan 1885) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Pseudomonas aeruginosa is an opportunistic pathogen and one of the major model organisms for the study of chemotaxis. The bacterium harbours 26 genes encoding chemoreceptors, most of which have not been annotated with a function. The paralogous chemoreceptors PctA and PctB (Pseudomonas chemotactic transducer A and B) were found to mediate chemotaxis towards L-amino acids. However, the ligand spectrum of the receptors is quite different since the recombinant ligand-binding region (LBR) of PctA binds 17 different L-amino acids whereas that of PctB recognizes only five. To determine the molecular basis underlying this ligand specificity, PctA-LBR and PctB-LBR have been purified and crystals have been produced after pre-incubation with L-Ile and L-Arg, respectively. Initial crystallization conditions have been identified by the counter-diffusion method and X-ray data have been collected at 2.5 A (PctA-LBR bound to L-Ile) and 3.14 A (PctB-LBR bound to L-Arg) resolution. Crystals belonged to space groups P2(1)2(1)2(1) and P3(1)2(1), with unit-cell parameters a = 72.2, b = 78.5, c = 116.6 A and a = b = 111.6, c = 117.4, respectively, for PctA-LBR and PctB-LBR. Molecular-replacement methods will be pursued for structural determination. Purification, crystallization and preliminary crystallographic analysis of the ligand-binding regions of the PctA and PctB chemoreceptors from Pseudomonas aeruginosa in complex with amino acids.,Rico-Jimenez M, Munoz-Martinez F, Krell T, Gavira JA, Pineda-Molina E Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 Dec;69(Pt 12):1431-5. doi:, 10.1107/S1744309113023592. Epub 2013 Nov 29. PMID:24316847 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Chemotaxis protein

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