Catalysis of the reaction: 2-amino-4-hydroxy-6-hydroxymethyl-7,8-dihydropteridine + ATP = (2-amino-4-hydroxy-7,8-dihydropteridin-6-yl)methyl diphosphate + AMP + 2 H(+).
Statements about 2-Amino-4-Hydroxy-6-Hydroxymethyldihydropteridine Diphosphokinase Activity