ID 1.17.7.1 DE (E)-4-hydroxy-3-methylbut-2-enyl-diphosphate synthase (ferredoxin). AN (E)-4-hydroxy-3-methylbut-2-enyl diphosphate synthase. AN 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase. CA (2E)-4-hydroxy-3-methylbut-2-enyl diphosphate + H2O + 2 oxidized [2Fe- CA 2S]-[ferredoxin] = 2-C-methyl-D-erythritol 2,4-cyclic diphosphate + H(+) CA + 2 reduced [2Fe-2S]-[ferredoxin]. CC -!- Forms part of an alternative non-mevalonate pathway for isoprenoid CC biosynthesis. CC -!- Bacteria have a similar enzyme that uses flavodoxin rather than CC ferredoxin (cf. EC 1.17.7.3). CC -!- The enzyme from the plant Arabidopsis thaliana is active with CC photoreduced 5-deazaflavin but not with flavodoxin. CC -!- Formerly EC 1.17.4.3. DR B0C6E1, ISPG_ACAM1 ; F4K0E8, ISPG_ARATH ; B1WQF1, ISPG_CROS5 ; DR B8HSI6, ISPG_CYAP4 ; B7KJJ4, ISPG_GLOC7 ; Q7NFA4, ISPG_GLOVI ; DR B0JJJ8, ISPG_MICAN ; B2J1G1, ISPG_NOSP7 ; P58666, ISPG_NOSS1 ; DR Q6K8J4, ISPG_ORYSJ ; Q7U712, ISPG_PARMW ; Q7VBS7, ISPG_PROMA ; DR Q7V7G9, ISPG_PROMM ; Q7V215, ISPG_PROMP ; B7K5R5, ISPG_RIPO1 ; DR Q31QC4, ISPG_SYNE7 ; Q2JS69, ISPG_SYNJA ; Q2JPZ9, ISPG_SYNJB ; DR B1XHZ7, ISPG_SYNP2 ; Q5N3W3, ISPG_SYNP6 ; Q0I9J4, ISPG_SYNS3 ; DR Q3AXP3, ISPG_SYNS9 ; Q3AK30, ISPG_SYNSC ; P73672, ISPG_SYNY3 ; DR Q8DK70, ISPG_THEVB ; Q10W70, ISPG_TRIEI ; Q3MG27, ISPG_TRIV2 ; //