Document Detail

Detection of genes involved in Fatty Acid elongation and desaturation in thraustochytrid marine eukaryotes.
MedLine Citation:
PMID:  21852747     Owner:  NLM     Status:  In-Data-Review    
Heterotrophic marine protists known as thraustochytrids can synthesize polyunsaturated fatty acids (PUFAs) such as docosahexaenoic acid (DHA). The biosynthetic pathways of PUFAs in thraustochytrids are poorly understood, however. In this study, we attempted to reveal the enzymes involved in DHA synthesis in thraustochytrids. Nine thraustochytrid strains representing 3 genera (Aurantiochytrium, Schizochytrium, and Thraustochytrium) were used for PCR-based detection of the genes encoding Δ5-elongase and Δ4-desaturase and for fatty acid analysis. The degenerate primers were designed to amplify the Δ5-elongase and Δ4-desaturase genes, and the partial sequences of the enzymes were obtained from the genera Thraustochytrium and Schizochytrium. These fragments were identical to those of known Δ5-elongase and Δ4-desaturase. Neither Δ5-elongase nor Δ4-desaturase was detected in the strains belonging to the genus Aurantiochytrium, however, suggesting that this group likely synthesizes DHA not via the elongation/desaturation pathway but via an alternate pathway such as the polyketide synthase pathway. The fatty acid profiles of thraustochytrids were consistent with the presence of genes involved in PUFA biosynthesis in thraustochytrid genera. Thus, our findings suggest that two biosynthetic pathways for PUFAs exist in these organisms.
Naoki Nagano; Keishi Sakaguchi; Yousuke Taoka; Yuji Okita; Daiske Honda; Makoto Ito; Masahiro Hayashi
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of oleo science     Volume:  60     ISSN:  1347-3352     ISO Abbreviation:  J Oleo Sci     Publication Date:  2011  
Date Detail:
Created Date:  2011-08-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101175339     Medline TA:  J Oleo Sci     Country:  Japan    
Other Details:
Languages:  eng     Pagination:  475-81     Citation Subset:  IM    
Department of Marine Biology and Environmental Sciences, Faculty of Agriculture, University of Miyazaki.
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