1zyk

Anthranilate Phosphoribosyltransferase in complex with PRPP, anthranilate and magnesium

spinqualitylabelsall models 1zyk, resolution 2.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1zyk is a 4 chain structure with sequence from 'saccharolobus solfataricus'. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: BE2, MG, PRP Related: 1o17, 1gxb, 1xfm, 1zxy Activity: Anthranilate phosphoribosyltransferase, with EC number 2.4.2.18 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [TRPD_SULSO] Catalyzes the transfer of the phosphoribosyl group of 5-phosphorylribose-1-pyrophosphate (PRPP) to anthranilate to yield N-(5'-phosphoribosyl)-anthranilate (PRA). 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 The metabolic synthesis and degradation of essential nucleotide compounds are primarily carried out by phosphoribosyltransferases (PRT) and nucleoside phosphorylases (NP), respectively. Despite the resemblance of their reactions, five classes of PRTs and NPs exist, where anthranilate PRT (AnPRT) constitutes the only evolutionary link between synthesis and degradation processes. We have characterized the active site of dimeric AnPRT from Sulfolobus solfataricus by elucidating crystal structures of the wild-type enzyme complexed to its two natural substrates anthranilate and 5-phosphoribosyl-1-pyrophosphate/Mg(2+). These bind into two different domains within each protomer and are brought together during catalysis by rotational domain motions as shown by small angle x-ray scattering data. Steady-state kinetics of mutated AnPRT variants address the role of active site residues in binding and catalysis. Results allow the comparative analysis of PRT and pyrimidine NP families and expose related structural motifs involved in nucleotide/nucleoside recognition by these enzyme families. Structural and mutational analysis of substrate complexation by anthranilate phosphoribosyltransferase from Sulfolobus solfataricus.,Marino M, Deuss M, Svergun DI, Konarev PV, Sterner R, Mayans O J Biol Chem. 2006 Jul 28;281(30):21410-21. Epub 2006 May 19. PMID:16714288 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphoribosyltransferase 3D structures

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