| pyrimidine phosphoribosyltransferase | <enzyme> Pyrimidine monophosphate and pyrophosphate gives pyrimidine and phosphoribosyl pyrophosphate; acts with uracil, orotic acid or fluorouracil Registry number: EC 2.4.2.- (26 Jun 1999) |
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| nicotinamide phosphoribosyltransferase | <enzyme> Utilises nicotinamide, mg(2+), prpp and ATP Registry number: EC 2.4.2.12 Synonym: nmn pyrophosphorylase (26 Jun 1999) |
| nicotinatenucleotide-dimethylbenzimidazole phosphoribosyltransferase | <enzyme> Involved in the synthesis of adenosyl-cobalamin (coenzyme b12); amino acid sequence given in second source Registry number: EC 2.4.2.21 Synonym: nicotinate ribonucleotide benzimidazole phosphoribosyltransferase, trans-n-glycosidase, nicotinate-nucleotide-dimethylbenzimidazole phosphoribosyltransferase, cobu gene product, cobt protein, scobt protein, cobt gene product (26 Jun 1999) |
| orotate phosphoribosyltransferase | <enzyme> The enzyme catalyzing the formation of orotidine-5'-phosphoric acid (orotidylic acid) from orotic acid and 5-phosphoribosyl-1-pyrophosphate in the course of pyrimidine nucleotide biosynthesis. Chemical name: Orotidine-5'-phosphate:pyrophosphate phospho-alpha-D-ribosyltransferase Registry number: EC 2.4.2.10 (12 Dec 1998) |
| uracil phosphoribosyltransferase | See: phosphoribosyltransferase. (05 Mar 2000) |