Compound as reactive (2)
H2O + ATP + guanine → H+ + phosphate + ADP + guanine
H2O + H+ + guanine → xanthine + ammonium
Compound as product (1)
H2O + ATP + guanine → H+ + phosphate + ADP + guanine
Reversible reaction (3)
diphosphate + GMP ↔ 5-phospho-α-D-ribose 1-diphosphate + guanine
phosphate + 2'-deoxyguanosine ↔ 2-deoxy-α-D-ribose 1-phosphate + guanine
guanosine + phosphate ↔ α-D-ribose-1-phosphate + guanine