Function
Catalyzes the transfer of diphosphate from ATP to 6-hydroxymethyl-7,8-dihydropterin (6-HMD), leading to 6-hydroxymethyl-7,8-dihydropterin diphosphate (6-HMDP). To a lesser extent, can also use CTP, UTP, and GTP as the nucleotide triphosphate substrate.