ID   1.14.19.23
DE   acyl-lipid (n+3)-(Z)-desaturase (ferredoxin).
AN   acyl-lipid omega(6)-desaturase (ferredoxin).
AN   linoleate synthase.
AN   oleate desaturase.
AN   oleoyl-CoA desaturase.
AN   phosphatidylcholine desaturase.
CA   a (9Z)-octadecenoyl-containing glycerolipid + 2 H(+) + O2 + 2 reduced
CA   [2Fe-2S]-[ferredoxin] = a (9Z,12Z)-octadecadienoyl-containing
CA   glycerolipid + 2 H2O + 2 oxidized [2Fe-2S]-[ferredoxin].
CC   -!- This plastidial enzyme is able to insert a cis double bond in
CC       monounsaturated fatty acids incorporated into glycerolipids.
CC   -!- The enzyme introduces the new bond at a position 3 carbons away from
CC       the existing double bond, toward the methyl end of the fatty acid.
CC   -!- The native substrates are oleoyl (18:1 Delta(9)) and (Z)-hexadec-7-
CC       enoyl (16:1 Delta(7)) groups attached to either position of the
CC       glycerol backbone in glycerolipids, resulting in the introduction of
CC       the second double bond at positions 12 and 10, respectively This
CC       prompted the suggestion that this is an omega(6) desaturase.
CC   -!- However, when acting on palmitoleoyl groups(16:1 Delta(9)),
CC       the enzyme introduces the second double bond at position 12
CC       (omega(4)), indicating it is an (n+3) desaturase. cf. EC 1.14.19.34.
DR   P46312, FAD6C_ARATH;  P48627, FAD6C_BRANA;  P48628, FAD6C_SOYBN;
DR   P48629, FAD6C_SPIOL;
//