IUBMB Enzyme Nomenclature


Accepted name: orotate phosphoribosyltransferase

Reaction: orotidine 5'-phosphate + diphosphate = orotate + 5-phospho-α-D-ribose 1-diphosphate

For diagram click here.

Other name(s): orotidylic acid phosphorylase; orotidine-5'-phosphate pyrophosphorylase; OPRTase; orotate phosphoribosyl pyrophosphate transferase; orotic acid phosphoribosyltransferase; orotidine 5'-monophosphate pyrophosphorylase; orotidine monophosphate pyrophosphorylase; orotidine phosphoribosyltransferase; orotidylate phosphoribosyltransferase; orotidylate pyrophosphorylase; orotidylic acid pyrophosphorylase; orotidylic phosphorylase; orotidylic pyrophosphorylase

Systematic name: orotidine-5'-phosphate:diphosphate phospho-α-D-ribosyl-transferase

Comments: The enzyme from higher eukaryotes also catalyses the reaction listed as EC, orotidine-5'-phosphate decarboxylase.

Links to other databases: BRENDA, EXPASY, GTD, KEGG, Metacyc, PDB, CAS registry number: 9030-25-5


1. Jones, M.E., Kavipurapu, P.R. and Traut, T.W. Orotate phosphoribosyltransferase: orotidylate decarboxylase (Ehrlich ascites cell). Methods Enzymol. 51 (1978) 155-167. [PMID: 692383]

2. Lieberman, I., Kornberg, A. and Simms, E.S. Enzymatic synthesis of pyrimidine nucleotides. Orotidine-5'-phosphate and uridine-5'-phosphate. J. Biol. Chem. 215 (1955) 403-415.

3. McClard, R.W., Black, M.J., Livingstone, L.R. and Jones, M.E. Isolation and initial characterization of the single polypeptide that synthesizes uridine 5'-monophosphate from orotate in Ehrlich ascites carcinoma. Purification by tandem affinity chromatography of uridine-5'-monophosphate synthase. Biochemistry 19 (1980) 4699-4706. [PMID: 6893554]

[EC created 1961, modified 1986]

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