label: diaminohydroxyphosphoribosylaminopyrimidine deaminase activity
label_lc: diaminohydroxyphosphoribosylaminopyrimidine deaminase activity
description: "Catalysis of the reaction: 2,5-diamino-6-hydroxy-4-(5-phosphoribosylamino)-pyrimidine + H2O + H+ = 5-amino-6-(5-phosphoribosylamino)uracil + NH4."