label: thiamine-phosphate diphosphorylase activity
label_lc: thiamine-phosphate diphosphorylase activity
description: "Catalysis of the reaction: 4-amino-2-methyl-5-diphosphomethylpyrimidine + 4-methyl-5-(2-phosphoethyl)-thiazole + H+ = diphosphate + thiamine phosphate."