2jbh

HUMAN PHOSPHORIBOSYL TRANSFERASE DOMAIN CONTAINING 1

spinqualitylabelsall models 2jbh, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2jbh is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 5GP, CA, PO4 NonStd Res: CAS Gene: PRTFDC1 (HUMAN) Activity: Hypoxanthine phosphoribosyltransferase, with EC number 2.4.2.8 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [PRDC1_HUMAN] Has low, barely detectable phosphoribosyltransferase activity (in vitro). Binds GMP, IMP and alpha-D-5-phosphoribosyl 1-pyrophosphate (PRPP). Is not expected to contribute to purine metabolism or GMP salvage. 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 Human hypoxanthine-guanine phosphoribosyltransferase (HPRT) (EC 2.4.2.8) catalyzes the conversion of hypoxanthine and guanine to their respective nucleoside monophosphates. Human HPRT deficiency as a result of genetic mutations is linked to both Lesch-Nyhan disease and gout. In the present study, we have characterized phosphoribosyltransferase domain containing protein 1 (PRTFDC1), a human HPRT homolog of unknown function. The PRTFDC1 structure has been determined at 1.7 A resolution with bound GMP. The overall structure and GMP binding mode are very similar to that observed for HPRT. Using a thermal-melt assay, a nucleotide metabolome library was screened against PRTFDC1 and revealed that hypoxanthine and guanine specifically interacted with the enzyme. It was subsequently confirmed that PRTFDC1 could convert these two bases into their corresponding nucleoside monophosphate. However, the catalytic efficiency (k(cat)/K(m)) of PRTFDC1 towards hypoxanthine and guanine was only 0.26% and 0.09%, respectively, of that of HPRT. This low activity could be explained by the fact that PRTFDC1 has a Gly in the position of the proposed catalytic Asp of HPRT. In PRTFDC1, a water molecule at the position of the aspartic acid side chain position in HPRT might be responsible for the low activity observed by acting as a weak base. The data obtained in the present study indicate that PRTFDC1 does not have a direct catalytic role in the nucleotide salvage pathway. Structural and functional studies of the human phosphoribosyltransferase domain containing protein 1.,Welin M, Egeblad L, Johansson A, Stenmark P, Wang L, Flodin S, Nyman T, Tresaugues L, Kotenyova T, Johansson I, Eriksson S, Eklund H, Nordlund P FEBS J. 2010 Dec;277(23):4920-30. doi: 10.1111/j.1742-4658.2010.07897.x., Epub 2010 Nov 5. PMID:21054786 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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