ID   1.14.19.36
DE   sn-1 acyl-lipid omega-3 desaturase (ferredoxin).
CA   (1) a 1-[(6Z,9Z,12Z)-octadectrienoyl]-2-acyl-glycerolipid + 2 H(+) + O2 +
CA   2 reduced [2Fe-2S]-[ferredoxin] = a 1-[(6Z,9Z,12Z,15Z)-
CA   octadectetraenoyl]-2-acyl-glycerolipid + 2 H2O + 2 oxidized [2Fe-2S]-
CA   [ferredoxin].
CA   (2) a 1-[(9Z,12Z)-octadecdienoyl]-2-acyl-glycerolipid + 2 H(+) + O2 +
CA   2 reduced [2Fe-2S]-[ferredoxin] = a 1-[(9Z,12Z,15Z)-octadectrienoyl]-2-
CA   acyl-glycerolipid + 2 H2O + 2 oxidized [2Fe-2S]-[ferredoxin].
CC   -!- The enzyme, characterized from cyanobacteria, introduces a cis double
CC       bond at carbon 15 of linoleoyl and gamma-linolenoyl groups attached
CC       to the sn-1 position of glycerolipids.
CC   -!- The enzyme is an omega desaturase, and determines the location of the
CC       double bond by counting three carbons from the methyl end of the
CC       fatty acid.
CC   -!- It is non-specific with respect to the polar head group of the
CC       glycerolipid. cf. EC 1.14.19.35.
DR   Q704F0, DESB_NOSS3 ;  Q79EF1, DESB_SYNY3 ;
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