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ENZYME

ENZYME entry: EC 1.14.19.35

Accepted Name
sn-2 acyl-lipid omega-3 desaturase (ferredoxin)
Reaction catalysed
  • a (7Z,10Z)-hexadecadienoyl-containing glycerolipid + 2 H(+) + O2 + 2 reduced [2Fe-2S]-[ferredoxin] <=> a (7Z,10Z,13Z)-hexadecatrienoyl-containing glycerolipid + 2 H2O + 2 oxidized [2Fe-2S]-[ferredoxin]
  • a (9Z,12Z)-octadecadienoyl-containing glycerolipid + 2 H(+) + O2 + 2 reduced [2Fe-2S]-[ferredoxin] <=> (9Z,12Z,15Z)-octadecatrienoyl-containing glycerolipid + 2 H2O + 2 oxidized [2Fe-2S]-[ferredoxin]
Comment(s)
  • This plastidial enzyme desaturates 16:2 fatty acids attached to the sn-2 position of glycerolipids to 16:3 fatty acids, and converts18:2 to 18:3 in both the sn-1 and sn-2 positions.
  • It acts on all 16:2- or 18:2-containing chloroplast membrane lipids, including phosphatidylglycerol, monogalactosyldiacylglycerol, digalactosyldiaclyglycerol, and sulfoquinovosyldiacylglycerol.
  • The enzyme introduces a cis double bond at a location 3 carbons away from the methyl end of the fatty acid.
  • The distance from the carboxylic acid end of the molecule does not affect the location of the new double bond. cf. EC 1.14.19.25 and EC 1.14.19.36.
Cross-references
BRENDA1.14.19.35
EC2PDB1.14.19.35
ExplorEnz1.14.19.35
PRIAM enzyme-specific profiles1.14.19.35
KEGG Ligand Database for Enzyme Nomenclature1.14.19.35
IUBMB Enzyme Nomenclature1.14.19.35
IntEnz1.14.19.35
MEDLINEFind literature relating to 1.14.19.35
MetaCyc1.14.19.35
Rhea expert-curated reactions1.14.19.35
UniProtKB/Swiss-Prot
P46310, FAD3C_ARATHQ56VS4, FAD3C_HELANP48622, FAD3D_ARATH

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