6j7k

Crystal structure of Pseudomonas aeruginosa Earp in complex with TDP-Rha

spinqualitylabelsall models 6j7k, resolution 2.15Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6j7k is a 1 chain structure with sequence from Pseudomonas aeruginosa PAO1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.15Å Ligands: MES, MSE, TRH Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function EARP_PSEAE Protein-arginine rhamnosyltransferase that catalyzes the transfer of a single rhamnose to elongation factor P (EF-P) on 'Lys-32', a modification required for EF-P-dependent rescue of polyproline stalled ribosomes. Publication Abstract from PubMed A bacterial inverting glycosyltransferase EarP transfers rhamnose from dTDP-beta-l-rhamnose (TDP-Rha) to Arg32 of translation elongation factor P (EF-P) to activate its function. We report here the structural and biochemical characterization of Pseudomonas aeruginosa EarP. In contrast to recently reported Neisseria meningitidis EarP, P. aeruginosa EarP exhibits differential conformational changes upon TDP-Rha and EF-P binding. Sugar donor binding enhances acceptor binding to EarP, as revealed by structural comparison between the apo-, TDP-Rha-, and TDP/EF-P-bound forms and isothermal titration calorimetry experiments. In vitro EF-P rhamnosylation combined with active-site geometry indicates that Asp16 corresponding to Asp20 of N. meningitidis EarP is the catalytic base, whereas Glu272 is another putative catalytic residue. Our study should provide the basis for EarP-targeted inhibitor design against infections from P. aeruginosa and other clinically relevant species.IMPORTANCE Posttranslational rhamnosylation of EF-P plays a key role in Pseudomonas aeruginosa, establishing virulence and antibiotic resistance, as well as survival. The detailed structural and biochemical characterization of the EF-P-specific rhamnosyltransferase EarP from P. aeruginosa not only demonstrates that sugar donor TDP-Rha binding enhances acceptor EF-P binding to EarP but also should provide valuable information for the structure-guided development of its inhibitors against infections from P. aeruginosa and other EarP-containing pathogens. Complex Structure of Pseudomonas aeruginosa Arginine Rhamnosyltransferase EarP with Its Acceptor Elongation Factor P.,He C, Liu N, Li F, Jia X, Peng H, Liu Y, Xiao Y J Bacteriol. 2019 Jun 10;201(13). pii: JB.00128-19. doi: 10.1128/JB.00128-19., Print 2019 Jul 1. PMID:31010899 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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