Abstract
A cDNA coding for porcine leukocyte 12-lipoxygenase was expressed intracellularly in the methylotrophic yeast Pichia pastoris under the regulatory control of the alcohol oxidase promoter. The recombinant 12-lipoxygenase contained in the yeast cell lysate was soluble, displayed the catalytic properties of the native enzyme, and was recognized by antibodies prepared against native 12-lipoxygenase derived from porcine leukocytes. The catalytically active enzyme of the 100,000 x g supernatant obtained from the yeast lysate was readily purified by immunoaffinity chromatography to near homogeneity. Porcine leukocyte 12-lipoxygenase is the first arachidonic acid oxygenase to be expressed in yeast, an easy, inexpensive, and rapid method of expressing native and site-directed mutants of recombinant proteins.
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