Member database | NCBIfam (includes TIGRFAMs) |
NCBIfam type | family |
Short name | pyrE |
Description
Orotate phosphoribosyltransferase (OPRTase) is involved in the biosynthesis of pyrimidine nucleotides. Alpha-D-ribosyldiphosphate 5-phosphate (PRPP) and orotate are utilized to form pyrophosphate and orotidine 5'-monophosphate (OMP) in the presence of divalent cations, preferably Mg2+. In a number of eukaryotes, this protein is fused to a domain that catalyses the reaction (EC 4.1.1.23). The combined activity of EC 2.4.2.10 and EC 4.1.1.23 is termed uridine 5'-monophosphate synthase. The conserved Lys (K) residue at position 101 of the seed alignment has been proposed as the active site for the enzyme.
Integrated to
External Links
Representative structure
2yzk: Crystal structure of orotate phosphoribosyltransferase from Aeropyrum pernix