Characterization of the Brassica napus Extraplastidial Linoleate Desaturase by Expression in Saccharomyces cerevisiae1
AUTOR(ES)
Reed, Darwin W.
FONTE
American Society of Plant Physiologists
RESUMO
The substrate specificity and regioselectivity of the Brassica napus extraplastidial linoleate desaturase (FAD3) was investigated in vivo in a heterologous expression system. A strain of the yeast Saccharomyces cerevisiae producing the plant enzyme was constructed and cultured in media containing a variety of fatty acids. The products of desaturation of these potential substrates were determined by gas chromatographic and mass spectrometric analysis of the yeast cultures. The results indicate that the enzyme has: (a) ω-3, as opposed to Δ-15 or double-bond-related regioselectivity, (b) the ability to desaturate substrates in the 16 to 22 carbon range, (c) a preference for substrates with ω-6 double bonds, but the ability to desaturate substrates with ω-6 hydroxyl groups or ω-9 or ω-5 double bonds, and (d) a relative insensitivity to double bonds proximal to the carboxyl end of the substrate.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=58906Documentos Relacionados
- Functional expression of the extraplastidial Arabidopsis thaliana oleate desaturase gene (FAD2) in Saccharomyces cerevisiae.
- Characterization of the Biotin Transport System in Saccharomyces cerevisiae1
- THE OXIDATION OF GLUCOSE AND ACETATE BY SACCHAROMYCES CEREVISIAE1
- The “Unknown Factor” in the Growth of Saccharomyces cerevisiae1
- Regulation of Biotin Transport in Saccharomyces cerevisiae1