Tags: Enzyme.
In enzymology a GTP cyclohydrolase II (EC 3.5.4.25) is an enzyme that catalyzes the chemical reactionGTP + 3 H2O formate + 25-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine + diphosphateThus the two substrates of this enzyme are GTP and H2O whereas its 3 products are formate 25-diamino-6-hydroxy-4-(5-phosphoribosylamino)pyrimidine and diphosphate.This enzyme belongs to the family of hydrolases those acting on carbon-nitrogen bonds other than peptide bonds specifically in cyclic amidines.