Reaction: a 1-oleoyl-2-acyl-[glycerolipid] + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = a 1-linoleoyl-2-acyl-[glycerolipid] + 2 oxidized ferredoxin [iron-sulfur] cluster + 2 H2O
Other name(s): desA (gene name)
Systematic name: 1-oleoyl-2-acyl-[glycerolipid],ferredoxin:oxygen oxidoreductase (12,13-cis-dehydrogenating)
Comments: The enzyme, characterized from cyanobacteria, introduces a cis double bond at carbon 12 of oleoyl groups (18:1) attached to the sn-1 position of glycerolipids. The enzyme is a methyl-end desaturase, introducing the new double bond between a pre-existing double bond and the methyl-end of the fatty acid. It is nonspecific with respect to the polar head group of the glycerolipid.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
1. Wada, H., Gombos, Z. and Murata, N. Enhancement of chilling tolerance of a cyanobacterium by genetic manipulation of fatty acid desaturation. Nature 347 (1990) 200-203. [PMID: 2118597]
2. Higashi, S. and Murata, N. An in vivo study of substrate specificities of acyl-lipid desaturases and acyltransferases in lipid synthesis in Synechocystis PCC6803. Plant Physiol. 102 (1993) 1275-1278. [PMID: 12231903]
3. Amiri, R.M., Yur'eva, N.O., Shimshilashvili, K.R., Goldenkova-Pavlova, I.V., Pchelkin, V.P., Kuznitsova, E.I., Tsydendambaev, V.D., Trunova, T.I., Los, D.A., Jouzani, G.S. and Nosov, A.M. Expression of acyl-lipid Δ12-desaturase gene in prokaryotic and eukaryotic cells and its effect on cold stress tolerance of potato. J Integr Plant Biol 52 (2010) 289-297. [PMID: 20377689]