DELTA-8 DESATURASES AND THEIR USE IN MAKING POLYUNSATURATED FATTY ACIDS

摘要

The present invention relates to ?8 desaturase genes, which have the ability to convert eicosadienoic acid (EDA; 20:2 ?-6) to dihomo-?-linolenic acid (DGLA; 20:3 ?-6) and/or eicosatrienoic acid (ETrA; 20:3 ?-3) to eicosatetraenoic acid (ETA; (20:3 ?-3). Isolated nucleic acid fragments and recombinant DNA constructs comprising such fragments encoding ?8 desaturases along with a method of making long-chain polyunsaturated fatty acids (PUFAs) using these ?8 desaturases in oleaginous yeast are disclosed.