Protein
Arachidonate 12-lipoxygenase, 12S-type
Organism
Rattus norvegicus
Function
Non-heme iron-containing dioxygenase that catalyzes the stereo-specific peroxidation of free and esterified polyunsaturated fatty acids generating a spectrum of bioactive lipid mediators. Mainly converts arachidonic acid to (12S)-hydroperoxyeicosatetraenoic acid/(12S)-HPETE but can also metabolize linoleic acid. Has a dual activity since it also converts leukotriene A4/LTA4 into both the bioactive lipoxin A4/LXA4 and lipoxin B4/LXB4. Through the production of specific bioactive lipids like (12S)-HPETE it regulates different biological processes including platelet activation. It also probably positively regulates angiogenesis through regulation of the expression of the vascular endothelial growth factor. Plays a role in apoptotic process, promoting the survival of vascular smooth muscle cells for instance. May also play a role in the control of cell migration and proliferation.
Similarity
Belongs to the lipoxygenase family.
Sequence
MGRYRVRVVTGAWLFSGSVNLVRLWLVGAHREARLELQLRPARGKEEEFDFDVAEDLGPLQFVKLHKEHTVVDDAWFCNLITVQGPGMSAEAVFPCYRWVQGEGILRLPEGTARLAGDNALDVFQKHREKELKERQQTYRWATWKQGLPQTIAADCKDDLPPNMRFHEEKRLDFEWTLKAGVLEMGLKRVYTLLRSWNRLEDFDQIFWGQKSALAEKVHRCWQEDELFGYQFLNGANPMLLRRSTSLPSRLVLPPGTEELQAQLEKELKDGCLFEADFILLDGIPANVIRGEQQYLAAPLVMLRMDPSGKLLPMAIQIQPPNPSSPAPTLFLPSDPPLAWLLAKIWVRNSDFQLQELQFHLLNTHLVAEVIAVATMRCLPGLHPIFKLLVPHIRYTMEINTRSRTQLISDGGIFDQVVSTGGGGHVQLLTRAVAQLTYCSLCPPDDLATRGLLRVPSALYAQDALQLWEVTARYVNGMVHLFYQSDDIVRGDPELQAWCREITEVGLCHAQDRGFPVSFQSRAQLCHFLTMCVFTCTSQHAAINQGQLDWYGWVPNAPCTMRMPPPTSKDDVTMETIMGSLPDVQKSCLQMTITWHLGRLQPDMVPLGHHKEKYFSDPRTKAVLSQFQADLENLEKEITARNQQLDLPYEYLKPSRIENSITI