Reaction catalyzed by phosphomethylpyrimidine synthase (4.1.99.17)
+
=
+
+
+
+
5-amino-1-(5-phospho-D-ribosyl)imidazole
+
S-adenosyl-L-methionine
=
4-amino-2-methyl-5-(phosphooxymethyl)pyrimidine
+
5'-deoxyadenosine
+
L-methionine
+
formate
+
CO
