2g97

Crystal Structure of Visfatin/Pre-B Cell Colony Enhancing Factor 1/Nicotinamide Phosphoribosyltransferase In Complex with the Specific Inhibitor FK-866

spinqualitylabelsall models 2g97, resolution 2.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2g97 is a 2 chain structure with sequence from Buffalo rat. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: DGB Related: 2g95, 2g96 Activity: Nicotinamide phosphoribosyltransferase, with EC number 2.4.2.12 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [NAMPT_RAT] Catalyzes the condensation of nicotinamide with 5-phosphoribosyl-1-pyrophosphate to yield nicotinamide mononucleotide, an intermediate in the biosynthesis of NAD. It is the rate limiting component in the mammalian NAD biosynthesis pathway (By similarity). 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 Visfatin/pre-B cell colony-enhancing factor 1 (PBEF)/nicotinamide phosphoribosyltransferase (NAmPRTase) is a multifunctional protein having phosphoribosyltransferase, cytokine and adipokine activities. Originally isolated as a cytokine promoting the differentiation of B cell precursors, it was recently suggested to act as an insulin analog via the insulin receptor. Here, we describe the first crystal structure of visfatin in three different forms: apo and in complex with either nicotinamide mononucleotide (NMN) or the NAmPRTase inhibitor FK-866 which was developed as an anti-cancer agent, interferes with NAD biosynthesis, showing a particularly high specificity for NAmPRTase. The crystal structures of the complexes with either NMN or FK-866 show that the enzymatic active site of visfatin is optimized for nicotinamide binding and that the nicotinamide-binding site is important for inhibition by FK-866. Interestingly, visfatin mimics insulin signaling by binding to the insulin receptor with an affinity similar to that of insulin and does not share the binding site with insulin on the insulin receptor. To predict binding sites, the potential interaction patches of visfatin and the L1-CR-L2 domain of insulin receptor were generated and analyzed. Although the relationship between the insulin-mimetic property and the enzymatic function of visfatin has not been clearly established, our structures raise the intriguing possibility that the glucose metabolism and the NAD biosynthesis are linked by visfatin. Crystal structure of visfatin/pre-B cell colony-enhancing factor 1/nicotinamide phosphoribosyltransferase, free and in complex with the anti-cancer agent FK-866.,Kim MK, Lee JH, Kim H, Park SJ, Kim SH, Kang GB, Lee YS, Kim JB, Kim KK, Suh SW, Eom SH J Mol Biol. 2006 Sep 8;362(1):66-77. Epub 2006 Aug 9. PMID:16901503 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phosphoribosyltransferase 3D structures

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