label: 2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase activity
label_lc: 2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase activity
description: "Catalysis of the reaction: 5-hydroxy-2-oxo-4-ureido-2,5-dihydro-1H imidazole-5-carboxylate + H+ = S-allantoin + CO2."