Term Name:	phosphoribosyl-AMP cyclohydrolase activity
Synonyms:	1-(5-phospho-D-ribosyl)-AMP 1,6-hydrolase activity, phosphoribosyladenosine monophosphate cyclohydrolase activity, PRAMP-cyclohydrolase activity
Definition:	Catalysis of the reaction: 1-(5-phosphonatoribosyl)-5'-AMP + H2O = 1-(5-phosphoribosyl)-5-[(5-phosphoribosylamino)methylideneamino]imidazole-4-carboxamide.
Ontology:	GO: Molecular Function [GO:0004635]    QuickGO    AmiGO