Compound as reactive (1)
guanidinoacetate + S-adenosyl-L-methionine → creatine + S-adenosyl-L-homocysteine + H+
Compound as product (1)
glycine + L-arginine → guanidinoacetate + L-ornithine
Reversible reaction (2)
guanidinoacetate + ATP ↔ Nω-phosphoguanidinoacetate + H+ + ADP
H2O + guanidinoacetate ↔ glycine + urea