Protein
sn-2 acyl-lipid omega-3 desaturase (ferredoxin), chloroplastic
Organism
Helianthus annuus
Function
Chloroplast omega-3 fatty acid desaturase introduces the third double bond in the biosynthesis of 18:3, and probably also 16:3 fatty acids, important constituents of plant membranes. It is thought to use ferredoxin as an electron donor and to act on fatty acids esterified to galactolipids, sulfolipids and phosphatidylglycerol.
Similarity
Belongs to the fatty acid desaturase type 1 family.
Sequence
MAGLVLSGCAIKPFSQSLPIPTKRFITNPSNINLLHPKDPIFSPNFHGFSRWAVKVSAPLRIPSIDQQDLDLDLERERISSLDVQEEEIFDAGAPPPFKLADIRAAIPKRCWVKDPWRSMSYVVRDVAIVLGLAAAAAHLNNWLVWPLYWAAQGTMFWALFVLGHDCGHGSFSNNAKLNSVVGHLLHSSILVPYHGWRISHRTHHQNHGHVENDESWHPLTEKTFKSLDWITRTLRFTLPFPMLAYPFYLWNRSPGKSGSHFDPSSDLFVPAEQKDVITSTICWTTMLALLFGLNFVVGPVQMLKLYGIPYLINVMWLDFVTYLHHHGHEDKLPWYRGKEWSYLRGGLTTIDRDYGWINNIHHDIGTHVIHHLFPQIPHYHLIEATEAAKPVLGKYYREPKKSSPIPFHLLGELVRSLKKDHYVSDTGDVLYYQTDDKLSKEK