Term Name:	2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase activity
Synonyms:	4-(carbamoylamino)-5-hydroxy-2-oxo-2,5-dihydro-1H-imidazole-5-carboxylate decarboxylase activity, OHCU decarboxylase activity
Definition:	Catalysis of the reaction: 5-hydroxy-2-oxo-4-ureido-2,5-dihydro-1H imidazole-5-carboxylate + H+ = S-allantoin + CO2.
Ontology:	GO: Molecular Function [GO:0051997]    QuickGO    AmiGO