Abstract
The possible correlation between plasma membrane fluidity changes induced by modified cultivation conditions and cell sensitivity to the killer toxin K1 ofSaccharomyces cerevisiae were investigated. Cells grown under standard conditions exhibited high toxin sensitivity. Both a membrane fluidity drop and fluidity rise brought about markedly reduced sensitivity to the toxin. These results do not fit the hypothesis of physiological relevance of direct toxin-lipid interaction, suggesting that the essential event in killer toxin action is interaction with membrane protein(s) that can be negatively influenced by any changes of membrane fluidity.
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Abbreviations
- DPH:
-
1,6-diphenyl-1,3,5-hexatriene
- PMF:
-
plasma membrane fluidity
- SSFA:
-
steady-state fluorescence anisotropy
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Flegelová, H., Chaloupka, R., Novotná, D. et al. Changes in plasma membrane fluidity lower the sensitivity ofS. cerevisiae to killer toxin K1. Folia Microbiol 48, 761–766 (2003). https://doi.org/10.1007/BF02931510
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DOI: https://doi.org/10.1007/BF02931510