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ENZYME entry: EC 1.14.19.75

Accepted Name
very-long-chain acyl-lipid omega-9 desaturase.
Reaction catalysed
  • a 1-hexacosanoyl-2-acyl-phosphoglycerolipid + 2 Fe(II)-[cytochrome b5] + 2 H(+) + O2 <=> a 1-[(17Z)-hexacos-17-enoyl]-2-acyl-phosphoglycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O
  • a 1-tetracosanoyl-2-acyl-phosphoglycerolipid + 2 Fe(II)-[cytochrome b5] + 2 H(+) + O2 <=> a 1-[(15Z)-tetracos-15-enoyl]-2-acyl-phosphoglycerolipid + 2 Fe(III)-[cytochrome b5] + 2 H2O
Comment(s)
  • The enzyme, characterized from the plant Arabidopsis thaliana, acts on both 24:0 and 26:0 fatty acids, introducing a cis double bond at a position 9 carbons from the methyl end.
  • These very-long-chain fatty acids are found as a minor component of seed lipids, but also in the membrane phosphatidylethanolamine and phosphatidylserine, in sphingolipids, as precursors and components of cuticular and epicuticular waxes, and in suberin.
Cross-references
BRENDA1.14.19.75
EC2PDB1.14.19.75
ExplorEnz1.14.19.75
PRIAM enzyme-specific profiles1.14.19.75
KEGG Ligand Database for Enzyme Nomenclature1.14.19.75
IUBMB Enzyme Nomenclature1.14.19.75
IntEnz1.14.19.75
MEDLINEFind literature relating to 1.14.19.75
MetaCyc1.14.19.75
Rhea expert-curated reactions1.14.19.75
UniProtKB/Swiss-Prot
Q9SID2, ADS2_ARATH

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