1.14.19.31: acyl-lipid (7-3)-desaturase

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For detailed information about acyl-lipid (7-3)-desaturase, go to the full flat file.

Word Map on EC 1.14.19.31

1.14.19.31

desaturation

docosahexaenoic

polyunsaturated

pavlova

microalgae

eicosapentaenoic

delta5

front-end

desaturases

Reaction

a (7Z,10Z,13Z,16Z)-docosa-7,10,13,16-tetraenoyl-[glycerolipid]

+ 2 ferrocytochrome b5 +

+ 2 H+ =

a (4Z,7Z,10Z,13Z,16Z)-docosa-4,7,10,13,16-pentaenoyl-[glycerolipid]

+ 2 ferricytochrome b5 + 2 H2O

Synonyms

CrDELTA4FAD, DELTA4 desaturase, DELTA4 fatty acid desaturase, DELTA4-desaturase, DELTA4-fatty acid desaturase, DELTA4Fad, Egd4p, FADS2, MGDG-specific DELTA4-desaturase, monogalactosyldiacylglycerol-specific DELTA4-desaturase, Old4p, PlDES1, PsD4Des

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

1.14.19.31 acyl-lipid (7-3)-desaturase

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Results	in table
13	AA Sequence
12	Cloned(Commentary)
7	Cofactor
6	Expression
26	General Information
14	Localization
2	Molecular Weight [Da]
3	Natural Substrates/ Products (Substrates)
23	Organism
1	Pathway
1	Purification (Commentary)
8	Reaction
23	Reference
6	Source Tissue
33	Substrates and Products (Substrate)
4	Subunits
35	Synonyms
1	Systematic Name

Systematic Name

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Systematic Name on EC 1.14.19.31 - acyl-lipid (7-3)-desaturase

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DELTA7 acyl-lipid,ferrocytochrome b5:oxygen oxidoreductase (4,5 cis-dehydrogenating)

The enzymes from several algae introduce a cis double bond at the 4-position in 22-carbon polyunsaturated fatty acids that contain a Delta7 double bond. The enzyme from the fresh water alga Chlamydomonas reinhardtii acts on the 16 carbon fatty acid (7Z,10Z,13Z)-hexadeca-7,10,13-trienoate [5]. The enzyme contains an N-terminal cytochrome b5 domain that acts as the direct electron donor to the active site of the desaturase, and does not require an external cytochrome.