1dku

CRYSTAL STRUCTURES OF BACILLUS SUBTILIS PHOSPHORIBOSYLPYROPHOSPHATE SYNTHETASE: MOLECULAR BASIS OF ALLOSTERIC INHIBITION AND ACTIVATION.

spinqualitylabelsall models 1dku, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1dku is a 2 chain structure with sequence from "vibrio_subtilis"_ehrenberg_1835 "vibrio subtilis" ehrenberg 1835. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ABM, AP2 Related: 1dkr Activity: Ribose-phosphate diphosphokinase, with EC number 2.7.6.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 Here we report the first three-dimensional structure of a phosphoribosylpyrophosphate (PRPP) synthetase. PRPP is an essential intermediate in several biosynthetic pathways. Structures of the Bacillus subtilis PRPP synthetase in complex with analogs of the activator phosphate and the allosteric inhibitor ADP show that the functional form of the enzyme is a hexamer. The individual subunits fold into two domains, both of which resemble the type I phosphoribosyltransfereases. The active site is located between the two domains and includes residues from two subunits. Phosphate and ADP bind to the same regulatory site consisting of residues from three subunits of the hexamer. In addition to identifying residues important for binding substrates and effectors, the structures suggest a novel mode of allosteric regulation. Structural basis for the function of Bacillus subtilis phosphoribosyl-pyrophosphate synthetase.,Eriksen TA, Kadziola A, Bentsen AK, Harlow KW, Larsen S Nat Struct Biol. 2000 Apr;7(4):303-8. PMID:10742175 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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