label: 4-hydroxy-3-methylbut-2-enyl-diphosphate synthase activity (flavodoxin)
label_lc: 4-hydroxy-3-methylbut-2-enyl-diphosphate synthase activity (flavodoxin)
description: "Catalysis of the reaction: (2E)-4-hydroxy-3-methylbut-2-enyl diphosphate + 2 H+ + H2O + oxidized [flavodoxin] = 2-C-methyl-D-erythritol 2,4-cyclic diphosphate + reduced [flavodoxin]."