acyl-[acyl-carrier-protein] 4-desaturase

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palmitoyl-[acyl-carrier protein]
+ 2 reduced ferredoxin [iron-sulfur] cluster +
+ 2 H+ =
(4Z)-hexadec-4-enoyl-[acyl-carrier protein]
+ 2 oxidized ferredoxin [iron-sulfur] cluster + 2 H2O


4PAD, A9-palmitoyl-ACP desaturase, DELTA4-16:0-ACP desaturase, DELTA4-palmitoyl-ACP desaturase, DELTA4-palmitoyl-acyl carrier protein desaturase, DELTA4-palmitoyl-[acyl carrier protein] desaturase, palmitoyl-[acyl-carrier-protein] 4-desaturase


     1 Oxidoreductases
         1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
             1.14.19 With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water
       acyl-[acyl-carrier-protein] 4-desaturase

Systematic Name

Systematic Name on EC - acyl-[acyl-carrier-protein] 4-desaturase

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IUBMB Comments
palmitoyl-[acyl-carrier protein],reduced acceptor:oxygen oxidoreductase (4,5 cis-dehydrogenating)
The enzymes from the plants Coriandrum sativum (coriander) and Hedera helix (English ivy) are involved in biosynthesis of petroselinate [(6Z)-octadec-6-enoate], which is formed by elongation of (4Z)-hexadec-4-enoate. The ivy enzyme can also act on oleoyl-[acyl-carrier protein] and palmitoleoyl-[acyl-carrier protein], generating the corresponding 4,9-diene.