IUBMB Enzyme Nomenclature


Accepted name: diaminohydroxyphosphoribosylaminopyrimidine deaminase

Reaction: 2,5-diamino-6-hydroxy-4-(5-phospho-D-ribosylamino)pyrimidine + H2O = 5-amino-6-(5-phospho-D-ribosylamino)uracil + NH3

Systematic name: 2,5-diamino-6-hydroxy-4-(5-phospho-D-ribosylamino)pyrimidine 2-aminohydrolase

Comments: The substrate is the product of EC GTP cyclohydrolase II.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 68994-19-4


1. Burrows, R.B. and Brown, G.M. Presence of Escherichia coli of a deaminase and a reductase involved in biosynthesis of riboflavin. J. Bacteriol. 136 (1978) 657-667. [PMID: 30756]

[EC created 1984, modified 2011]

Return to EC 3.5.4 home page
Return to EC 3.5 home page
Return to EC 3 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page