这个基因编码尿苷5'-单磷酸合酶。编码的蛋白质是一种双功能酶，对从头嘧啶生物合成途径的最后两个步骤进行催化。第一个反应是由N-末端的酶-磷酸核糖基转移酶进行的，该酶将乳清酸转化为5'-单磷酸盐。末端反应是由C末端酶OMP脱羧酶进行的，该酶能将5'-单磷酸列替丁转化为单磷酸尿苷。这个基因的缺陷是遗传性口腔酸尿的原因。交替剪接导致多个转录变体。[由RefSeq提供，2010年3月]
This gene encodes a uridine 5'-monophosphate synthase. The encoded protein is a bifunctional enzyme that catalyzes the final two steps of the de novo pyrimidine biosynthetic pathway. The first reaction is carried out by the N-terminal enzyme orotate phosphoribosyltransferase which converts orotic acid to orotidine-5'-monophosphate. The terminal reaction is carried out by the C-terminal enzyme OMP decarboxylase which converts orotidine-5'-monophosphate to uridine monophosphate. Defects in this gene are the cause of hereditary orotic aciduria. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]
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