Authors: Sun Hee Kim Jong Bum Kim Yo Soon Jang So Yun Kim Kyung Hee Roh Hyun Uk Kim KyeongRyeol Lee JongSug Park
Publish Date: 2011/12/24
Volume: 34, Issue: 2, Pages: 261-268
Abstract
To identify the genes encoding fatty acid elongases for the biosynthesis of polyunsaturated fatty acids PUFAs we isolated a cDNA via degenerate PCR and RACEPCR from Acanthopagrus schlegelii with a high similarity to the ELOVL5like elongases of mammals and fishes This gene is termed AsELOVL5 and encodes a 294 amino acid protein When AsELOVL5 was expressed in Saccharomyces cerevisiae it conferred an ability to elongate γlinolenic acid 183 n−6 to dihomoγlinolenic acid 203 n−6 In addition the transformed cells converted arachidonic acid 204 n−6 and eicosapentaenpic acid 205 n−3 to docosatetraenoic acid 224 n−6 and docosapentaenoic acid 225 n−3 respectively These results indicate that the AsELOVL5 gene encodes a longchain fatty acid elongase capable of elongating C18Δ6/C20Δ5 but not C22 PUFA substratesThis work was supported by grants from the National Academy of Agricultural Science PJ006745 the Rural Development Administration Republic of Korea SH Kim was supported by a 2011 Postdoctoral Fellowship Program of National Academy of Agricultural Science the Rural Development Administration Republic of Korea
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