label: 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin)
label_lc: 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase activity (ferredoxin)
description: "Catalysis of the reaction: (E)-4-hydroxy-3-methylbut-2-en-1-yl diphosphate + H2O + 2 oxidized ferredoxin = 2-C-methyl-D-erythritol 2,4-cyclodiphosphate + 2 reduced ferredoxin."