Tags: Enzyme.
In enzymology a phosphoribosyl-AMP cyclohydrolase (EC 3.5.4.19) is an enzyme that catalyzes the chemical reaction1-(5-phosphoribosyl)-AMP + H2O 1-(5-phosphoribosyl)-5-[(5- phosphoribosylamino)methylideneamino]imidazole-4-carboxamideThus the two substrates of this enzyme are 1-(5-phosphoribosyl)-AMP and H2O whereas its two products are [[1-(5-phosphoribosyl)-5-[(5-]] and [[phosphoribosylamino)methylideneamino]imidazole-4-carboxamide]].This enzyme belongs to the family of hydrolases those acting on carbon-nitrogen bonds other than peptide bonds specifically in cyclic amidines.