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Information on EC 1.14.19.31 - acyl-lipid (7-3)-desaturase

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IUBMB Comments
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 . 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.
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Word Map
  • 1.14.19.31
  • desaturation
  • polyunsaturated
  • docosahexaenoic
  • microalgae
  • pavlova
  • eicosapentaenoic
  • front-end
  • delta5
  • desaturases
The enzyme appears in viruses and cellular organisms
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, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
a (7Z,10Z,13Z,16Z)-docosa-7,10,13,16-tetraenoyl-[glycerolipid] + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4Z,7Z,10Z,13Z,16Z)-docosa-4,7,10,13,16-pentaenoyl-[glycerolipid] + 2 ferricytochrome b5 + 2 H2O
show the reaction diagram
(2)
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a (7Z,10Z,13Z,16Z)-docosa-7,10,13,16-tetraenoyl-[glycerolipid] + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4Z,7Z,10Z,13Z,16Z)-docosa-4,7,10,13,16-pentaenoyl-[glycerolipid] + ferricytochrome b5 + 2 H2O
show the reaction diagram
a (7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoyl-[glycerolipid] + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoyl-[glycerolipid] + 2 ferricytochrome b5 + 2 H2O
show the reaction diagram
(1)
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a (7Z,10Z,13Z,16Z,19Z)-docosa-7,10,13,16,19-pentaenoyl-[glycerolipid] + 2 ferrocytochrome b5 + O2 + 2 H+ = a (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoyl-[glycerolipid] + ferricytochrome b5 + 2 H2O
show the reaction diagram
PATHWAY SOURCE
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