1ukz

SUBSTRATE SPECIFICITY AND ASSEMBLY OF CATALYTIC CENTER DERIVED FROM TWO STRUCTURES OF LIGATED URIDYLATE KINASE

spinqualitylabelsall models 1ukz, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ukz is a 1 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ADP, AMP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [KCY_YEAST] Catalyzes the phosphorylation of pyrimidine nucleoside monophosphates at the expense of ATP. Plays an important role in de novo pyrimidine nucleotide biosynthesis. Has preference for UMP and dUMP as phosphate acceptors, but can also use CMP, dCMP, AMP, GMP, dGMP and dTMP. ATP and dATP are the best phosphate donors, but can also use GTP, dGTP, dCTP, and dTTP to some degree. 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 Two crystal structures of ligated uridylate kinase from Saccharomyces cerevisiae were determined by X-ray analyses. The ligands were ADP and AMP. Cocrystallization with ATP yielded crystals with ADP at the ATP site and a mixture of AMP and ADP at the NMP site. Cocrystallization with ADP gave rise to a distinct crystal type with ADP at the ATP site, but only AMP at the NMP site. In both cases, the substrates are kept in place by favorable crystal contacts. The structures have been refined to R-factors of 17.8% and 19.6% at resolutions of 2.1 A and 1.9 A, respectively. A comparison with the related cytosolic adenylate kinase from pig disclosed large induced-fit movements on substrate binding and the disassembly of the catalytic center in the absence of substrates. The relatively high side-activity of uridylate kinase for AMP is explained by the finding that the binding pocket is sized for an AMP, but constructed to bind UMP together with a water molecule. Substrate specificity and assembly of the catalytic center derived from two structures of ligated uridylate kinase.,Muller-Dieckmann HJ, Schulz GE J Mol Biol. 1995 Mar 3;246(4):522-30. PMID:7877173 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Uridylate kinase

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