Avtor/Urednik		Turk, Martina; Montiel, Vera; Žigon, Dušan; Plemenitaš, Ana; Ramos, Jose
Naslov		Plasma membrane composition of Debaryomyces hansenii adapts to changes in pH and external salinity
Tip		članek
Vir		Microbiology
Vol. in št.		Letnik 153, št. 10
Leto izdaje		2007
Obseg		str. 3586-92
Jezik		eng
Abstrakt		Debaryomyces hansenii is a marine yeast that has to cope with different stress situations. Since changes in membrane properties can play an important function in adaptation, we have examined the fluidity and lipid composition of purified plasma membranes of D. hansenii grown at different external pH values and salt concentrations. Growth at low pH caused an increase in the sterol-to-phospholipid ratio and a decrease in fatty acid unsaturation which was reflected in decreased fluidity of the plasma membrane. High levels of NaCl increased the sterol-to-phospholipid ratio and fatty acid unsaturation, but did not significantly affect fluidity. The sterol-to-phospholipid ratios obtained in D. hansenii grown under any of these conditions were similar to the ratios that have been reported for halophilic/halotolerant black yeasts, but much smaller than those observed in the model yeast Saccharomyces cerevisiae.
Deskriptorji		YEASTS HYDROGEN-ION CONCENTRATION SODIUM CHLORIDE CELL MEMBRANE PERMEABILITY CELL MEMBRANE STEROLS PHOSPHOLIPIDS FATTY ACIDS ADAPTATION, BIOLOGICAL