1.14.19.23: acyl-lipid (n+3)-(Z)-desaturase (ferredoxin)

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For detailed information about acyl-lipid (n+3)-(Z)-desaturase (ferredoxin), go to the full flat file.

Word Map on EC 1.14.19.23

1.14.19.23

oleic

linoleic

desaturation

polyunsaturated

cotton

omega-3

fat1

cottonseed

docosahexaenoic

pufas

eicosapentaenoic

acanthamoeba

spinacia

desaturase-2

castellanii

upland

gossypium

Reaction

+ 2 reduced ferredoxin [iron-sulfur] cluster +

+ 2 H+ =

+ 2 oxidized ferredoxin [iron-sulfur] cluster + 2 H2O

Synonyms

acyl-lipid omega6-desaturase (ferredoxin), DELTA-12 desaturase, FAD6, fatty acid desaturase-6, linoleate synthase, n-6 desaturase, oleate desaturase, oleoyl-CoA desaturase, oleoylphosphatidylcholine desaturase, phosphatidylcholine desaturase

ECTree

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

1.14.19.23 acyl-lipid (n+3)-(Z)-desaturase (ferredoxin)

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Results	in table
7	AA Sequence
3	Cloned(Commentary)
2	Expression
2	General Information
9	Localization
2	Molecular Weight [Da]
2	Natural Substrates/ Products (Substrates)
8	Organism
4	Pathway
1	pH Optimum
1	pH Range
1	Purification (Commentary)
1	Reaction
8	Reference
8	Source Tissue
1	Specific Activity [micromol/min/mg]
15	Substrates and Products (Substrate)
2	Subunits
18	Synonyms
1	Systematic Name

Systematic Name

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Systematic Name on EC 1.14.19.23 - acyl-lipid (n+3)-(Z)-desaturase (ferredoxin)

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oleoyl-[glycerolipid],ferredoxin:oxygen oxidoreductase (12,13 cis-dehydrogenating)

This plastidial enzyme is able to insert a cis double bond in monounsaturated fatty acids incorporated into glycerolipids. The enzyme introduces the new bond at a position 3 carbons away from the existing double bond, towards the methyl end of the fatty acid. The native substrates are oleoyl (18:1 Delta9) and (Z)-hexadec-7-enoyl (16:1 Delta7) groups attached to either position of the glycerol backbone in glycerolipids, resulting in the introduction of the second double bond at positions 12 and 10, respectively This prompted the suggestion that this is an omega6 desaturase. However, when acting on palmitoleoyl groups(16:1 Delta9), the enzyme introduces the second double bond at position 12 (omega4), indicating it is an (n+3) desaturase [3]. cf. EC 1.14.19.34, acyl-lipid (9+3)-(E)-desaturase.