13‐Hydroxy‐9Z,11E‐Octadecadienoic Acid Production by Recombinant Cells Expressing Burkholderia thailandensis 13‐Lipoxygenase

Abstract

Linoleate 13-lipoxygenase from Burkholderia thailandensis was expressed in Escherichia coli for the production of 13-hydroxyoctadecadienoic acid (13-HODE), an antiseptic emulsifier. Linoleate 13-lipoxygenase in cells had higher thermal stability than the purified enzyme. To increase 13-HODE production, recombinant cells were permeabilized by solvents, detergents, salts, and other chemicals. The enzymatic activity in cells was the highest for permeabilized cells treated with 0.5 M NaCl among the permeabilizers tested. The optimal reaction conditions for the production of 13-HODE from linoleic acid by permeabilized cells treated with 0.5 M NaCl were at pH 7.5, 25 °C, 20 g/l linoleic acid, 15 g/l cells, 0.15 mM Cu 2+ , and 6 % (v/v) methanol in a 100-ml baffled flask containing a 5-ml working volume with agitation at 200 rpm. Under these conditions, permeabilized cells produced 15.8 g/l 13-HODE after 30 min with a conversion yield of 79 % (w/w) and a productivity of 31.6 g/l/h. The conversion yield and productivity of permeabilized cells for 13-HODE production were higher than those of purified and crude enzymes as well as nonpermeabilized cells. Therefore, permeabilized cells were efficient biocatalysts for 13-HODE production. To the best of our knowledge, this is the first report of the production of 13-HODE using cells. Electronic supplementary materialThe online version of this article (

Production of 8,11‐dihydroxy and 8‐hydroxy unsaturated fatty acids from unsaturated fatty acids by recombinant Escherichia coli expressing 8,11‐linoleate diol synthase from Penicillium chrysogenum

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