Author/Editor		Petrovič, U; Gunde-Cimerman, N; Plemenitaš, A
Title		Primerjava aktivnosti hidroksi-metil-glutaril koencim A reduktaze med ekstremofilnimi in mezofilno kvasovko
Type		članek
Source		In: Bole-Hribovšek V, Ocepek M, Klun N, editors. Zbornik s programom 2. kongres slovenskih mikrobiologov z mednarodno udeležbo; 1998 sep 27-30; Portorož. Ljubljana: Slovensko mikrobiološko društvo,
Publication year		1998
Volume		str. 271-4
Language		slo
Abstract		Halophilic yeasts are poorly studied extremophilic eukaryots that are recently gaining on importance in the field of biotechnology as well as in the basic studies. One of the adaptations of halophilic microorganisms to increased salinity and osmolarity of the environment is different compostion and portion of sterols in their plasma membrane. Hydroxy-methyl-glutaryl coenzyme A reductase (HMG R) is a key regulatory enzyme in the biosynthesis of sterols. We measured the activity of HMG R in three halophilic or halotolerant black yeasts, Hortaea werneckii, Phaetheca triangularis and Trimmatostroma sp. isolated from the Sečovlje salterns in Slovenia. We compared the optimal conditions for in vitro activity of HMG R in selected extremophilic yeasts and in a mesophile, Saccharomyces cerevisiae. The correlation between the abiotic factors of the habitats from which yeasts had been isolated, and the pH and ionic strength of the buffer, optimal for the in vitro activity of HMG R was found.
Descriptors		YEASTS HYDROXYMETHYLGLUTARYL COA REDUCTASES