3qy3 | pdb_00003qy3

PA2801 protein, a putative Thioesterase from Pseudomonas aeruginosa

spinqualitylabelsall models 3qy3, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3qy3 is a 1 chain structure with sequence from Pseudomonas aeruginosa. This structure supersedes the now removed PDB entry 2ali. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL NonStd Res: MSE Gene: PA2801 (Pseudomonas aeruginosa) Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed The hotdog fold is one of the basic protein folds widely present in bacteria, archaea and eukaryotes. Many of these proteins exhibit thioesterase activity against fatty acyl-CoAs and play important roles in lipid metabolism, cellular signalling and degradation of xenobiotics. The genome of the opportunistic pathogen Pseudomonas aeruginosa contains over 20 genes encoding predicted hotdog-fold proteins, none of which have been experimentally characterized. We have found that two P. aeruginosa hotdog proteins display high thioesterase activity against 3-hydroxy-3-methylglutaryl-CoA and glutaryl-CoA (PA5202), and octanoyl-CoA (PA2801). Crystal structures of these proteins were solved (at 1.70 and 1.75 A for PA5202 and PA2801 respectively) and revealed a hotdog fold with a potential catalytic carboxylate residue located on the long alpha-helix (Asp(57) in PA5202 and Glu(35) in PA2801). Alanine residue replacement mutagenesis of PA5202 identified four residues (Asn(42), Arg(43), Asp(57) and Thr(76)) that are critical for its activity and are located in the active site. A P. aeruginosa PA5202 deletion strain showed an increased secretion of the antimicrobial pigment pyocyanine and an increased expression of genes involved in pyocyanin biosynthesis, suggesting a functional link between PA5202 activity and pyocyanin production. Thus the P. aeruginosa hotdog thioesterases PA5202 and PA2801 have similar structures, but exhibit different substrate preferences and functions. Structure and activity of the Pseudomonas aeruginosa hotdog-fold thioesterases PA5202 and PA2801.,Gonzalez CF, Tchigvintsev A, Brown G, Flick R, Evdokimova E, Xu X, Osipiuk J, Cuff ME, Lynch S, Joachimiak A, Savchenko A, Yakunin AF Biochem J. 2012 Jun 15;444(3):445-55. PMID:22439787 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Thioesterase

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