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• W2805129063 abstract "Plasma membrane (PM) lipid composition imbalances affect drug susceptibilities of the human pathogen Candida albicans . The PM fundamental structure is made up of phospholipid bilayer where phosphatidylethanolamine (PE) contributes as second major phospholipid moieties, which is asymmetrically distributed between the two leaflets of the bilayer. PSD1 and PSD2 genes encode phosphatidylserine decarboxylase which converts phosphatidylserine (PS) into PE in C. albicans cells. Genetic manipulation of PSD1 and PSD2 genes is known to impact virulence, cell wall thickness and mitochondrial function in C. albicans . In the present study, we have examined the impact of PSD1 and PSD2 deletion on physiochemical properties of PM. Our fluorescence recovery after photobleaching (FRAP) experiments point that the PM of psd1 Δ/Δ psd2 Δ/Δ mutant strain displays increased membrane fluidity and reduced PM dipole potential. Further, the result of PSD1 and PSD2 deletion on the thermotropic phase behavior monitored by differential scanning calorimetry (DSC) showed that in comparison to WT, the apparent phase transition temperature is reduced by ~3 °C in the mutant strain. The functional consequence of altered physical state of PM of psd1 Δ/Δ psd2 Δ/Δ mutant strain was evident from observed high diffusion of fluorescent dye rhodamine 6G and radiolabelled fluconazole (FLC). The higher diffusion of FLC resulted in an increased drug accumulation in psd1 Δ/Δ psd2 Δ/Δ mutant cells, which was manifested in an increased susceptibility to azoles. To the best of our knowledge, these results constitute the first report on the effect of the levels of phospholipid biosynthesis enzyme on physiochemical properties of membranes and drug susceptibilities of Candida cells. • PSD1 and PSD2 genes deletion increase plasma membrane fluidity. • The psd1 Δ/Δ psd2 Δ/Δ mutant shows decreased plasma membrane dipole potential. • The deletion of psd1 Δ/Δ psd2 Δ/Δ results in decrease in phase transition temperature. • Increased drug diffusion and susceptibility are observed in psd1 Δ/Δ psd2 Δ/Δ mutant." @default.
• W2805129063 created "2018-06-13" @default.
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• W2805129063 date "2018-11-01" @default.
• W2805129063 modified "2023-10-03" @default.
• W2805129063 title "Phosphatidylserine decarboxylase governs plasma membrane fluidity and impacts drug susceptibilities of Candida albicans cells" @default.
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• W2805129063 doi "https://doi.org/10.1016/j.bbamem.2018.05.016" @default.
• W2805129063 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29856993" @default.
• W2805129063 hasPublicationYear "2018" @default.
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