1dhr
From Proteopedia
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CRYSTAL STRUCTURE OF RAT LIVER DIHYDROPTERIDINE REDUCTASE
Overview
The structure of a binary complex of dihydropteridine reductase [DHPR;, NAD(P)H:6,7-dihydropteridine oxidoreductase, EC 1.6.99.7] with its, cofactor, NADH, has been solved and refined to a final R factor of 15.4%, by using 2.3 A diffraction data. DHPR is an alpha/beta protein with a, Rossmann-type dinucleotide fold for NADH binding. Insertion of an extra, threonine residue in the human enzyme is associated with severe symptoms, of a variant form of phenylketonuria and maps to a tightly linked sequence, of secondary-structural elements near the dimer interface. Dimerization is, mediated by a four-helix bundle motif (two helices from each protomer), having an unusual right-handed twist. DHPR is structurally and, mechanistically distinct from dihydrofolate reductase, appearing to more, closely resemble certain nicotinamide dinucleotide-requiring, flavin-dependent enzymes, such as glutathione reductase.
About this Structure
1DHR is a Single protein structure of sequence from Rattus norvegicus with NAD as ligand. Active as 6,7-dihydropteridine reductase, with EC number 1.5.1.34 Full crystallographic information is available from OCA.
Reference
Crystal structure of rat liver dihydropteridine reductase., Varughese KI, Skinner MM, Whiteley JM, Matthews DA, Xuong NH, Proc Natl Acad Sci U S A. 1992 Jul 1;89(13):6080-4. PMID:1631094
Page seeded by OCA on Tue Nov 20 13:17:26 2007
