1o17

ANTHRANILATE PHOSPHORIBOSYL-TRANSFERASE (TRPD)ANTHRANILATE PHOSPHORIBOSYL-TRANSFERASE (TRPD)

Structural highlights 1o17 is a 4 chain structure with sequence from Saccharolobus solfataricus. This structure supersedes the now removed PDB entry 1k8e. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.05Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRPD_SACS2 Catalyzes the transfer of the phosphoribosyl group of 5-phosphorylribose-1-pyrophosphate (PRPP) to anthranilate to yield N-(5'-phosphoribosyl)-anthranilate (PRA).[HAMAP-Rule:MF_00211] 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 crystal structure of the dimeric anthranilate phosphoribosyltransferase (AnPRT) reveals a new category of phosphoribosyltransferases, designated as class III. The active site of this enzyme is located within the flexible hinge region of its two-domain structure. The pyrophosphate moiety of phosphoribosylpyrophosphate is co-ordinated by a metal ion and is bound by two conserved loop regions within this hinge region. With the structure of AnPRT available, structural analysis of all enzymatic activities of the tryptophan biosynthesis pathway is complete, thereby connecting the evolution of its enzyme members to the general development of metabolic processes. Its structure reveals it to have the same fold, topology, active site location and type of association as class II nucleoside phosphorylases. At the level of sequences, this relationship is mirrored by 13 structurally invariant residues common to both enzyme families. Taken together, these data imply common ancestry of enzymes catalysing reverse biological processes--the ribosylation and deribosylation of metabolic pathway intermediates. These relationships establish new links for enzymes involved in nucleotide and amino acid metabolism. Structural analysis of two enzymes catalysing reverse metabolic reactions implies common ancestry.,Mayans O, Ivens A, Nissen LJ, Kirschner K, Wilmanns M EMBO J. 2002 Jul 1;21(13):3245-54. PMID:12093726 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphoribosyltransferase 3D structures

spinqualitylabelsall models 1o17, resolution 2.05Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image