The influence of fermentation conditions and recycling on the phospholipid and fatty acid composition of the brewer's yeast plasma membranes
Language English Country United States Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
- MeSH
- Cell Membrane chemistry physiology MeSH
- Fermentation * MeSH
- Phosphatidylcholines analysis MeSH
- Phosphatidylethanolamines analysis MeSH
- Phospholipids analysis MeSH
- Stress, Physiological physiology MeSH
- Fatty Acids analysis MeSH
- Saccharomyces cerevisiae chemistry physiology MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Phosphatidylcholines MeSH
- Phosphatidylethanolamines MeSH
- Phospholipids MeSH
- Fatty Acids MeSH
- phosphatidylethanolamine MeSH Browser
Phospholipid (PL) and fatty acid (FA) compositions of the plasma membrane (PM), as well as the FA composition of the PM phosphatidylcholine (PtdCho) and phosphatidylethanolamine (PtdEtn) in the pure culture (zero generation) and the first three recycled generations of the bottom-fermenting brewer's yeast, have been determined. The PL composition differed markedly among the generations; in the zero generation, phosphatidylinositol (PtdIns) was the main PL, accounting for 27% of total PLs, followed by phosphatidic acid and PtdCho. In all recycled generations, the main PL was PtdCho with a marked increase in the first generation compared with the zero (32% and 20%, respectively), followed by PtdIns in the first and second generations. In the FA composition of the PM, 22 FAs were identified, ranging from C(10) to C(26). The compositions of the PM FAs, as well as those of PtdCho and PtdEtn, were characterised by a high preponderance of C(16) acids. Saturated FAs prevailed in the zero generation, whilst unsaturated prevailed in the first and second generation. Although the profiles of FAs in PtdCho and PtdEtn were similar, some marked differences were observed, pointing out to their specific functions in the regulation of membrane properties.
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