2i4o | pdb_00002i4o

Rhodopseudomonas palustris prolyl-tRNA synthetase in complex with ATP

spinqualitylabelsall models 2i4o, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2i4o is a 3 chain structure with sequence from "rhodobacillus_palustris"_molisch_1907 "rhodobacillus palustris" molisch 1907. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ATP, MG Gene: proS,RPA2928 ("Rhodobacillus palustris" Molisch 1907) Activity: Proline--tRNA ligase, with EC number 6.1.1.15 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [SYP_RHOPA] Catalyzes the attachment of proline to tRNA(Pro) in a two-step reaction: proline is first activated by ATP to form Pro-AMP and then transferred to the acceptor end of tRNA(Pro). Can inadvertently accommodate and process cysteine. The misacylated Cys-tRNA(Pro) is not edited by ProRS.[HAMAP-Rule:MF_01570] 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 Prolyl-tRNA synthetases (ProRSs) are unique among synthetases in that they have diverse architectures, notably the variable presence of a cis-editing domain homologous to the freestanding deacylase proteins YbaK and ProX. Here, we describe crystal structures of two bacterial ProRSs from the pathogen Enterococcus faecalis, which possesses an editing domain, and from Rhodopseudomonas palustris, which does not. We compare the overall structure and binding mode of ATP and prolyl-adenylate with those of the archael/eukaryote-type ProRS from Thermus thermophilus. Although structurally more homologous to YbaK, which preferentially hydrolyzes Cys-tRNA(Pro), the editing domain of E. faecalis ProRS possesses key elements similar to ProX, with which it shares the activity of hydrolyzing Ala-tRNA(Pro). The structures give insight into the complex evolution of ProRSs, the mechanism of editing, and structural differences between prokaryotic- and eukaryotic-type ProRSs that can be exploited for antibiotic design. Structures of two bacterial prolyl-tRNA synthetases with and without a cis-editing domain.,Crepin T, Yaremchuk A, Tukalo M, Cusack S Structure. 2006 Oct;14(10):1511-25. PMID:17027500 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Aminoacyl tRNA Synthetase

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