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The Na+,K+/H+ -antiporter Nha1 influences the plasma membrane potential of Saccharomyces cerevisiae

Kinclova-Zimmermannova O, Gaskova D, Sychrova H.

. 2006 ; 37 (4) : 415-418.

Jazyk angličtina Země Nizozemsko

Perzistentní odkaz   https://www.medvik.cz/link/bmc07522947
E-zdroje Online

NLK ProQuest Central od 2003-03-01 do Před 1 rokem
Medline Complete (EBSCOhost) od 2006-01-01 do 2014-12-31
Health & Medicine (ProQuest) od 2003-03-01 do Před 1 rokem
Wiley Online Library (archiv) od 2001-01-01 do 2012-12-31
Oxford Journals Open Access Collection od 2001-04-01

There are three different sodium transport systems (Ena1-4p, Nha1p, Nhx1p) in Saccharomyces cerevisiae. The effect of their absence on the tolerance to alkali-metal cations and on the membrane potential was studied. All three sodium transporters were found to participate in the maintenance of Na+, Li+, K+ and Cs+ homeostasis. Measurements of the distribution of a fluorescent potentiometric probe (diS-C3(3) assay) in cell suspensions showed that the lack of all three transporters depolarizes the plasma membrane. The overexpression of the Na+,K+/H+ antiporter Nha1 resulted in the hyperpolarization of the plasma membrane and consequently increased the sensitivity to Cs+, Tl+ and hygromycin B. This is the first evidence that the activity of a Na+,K+/H+ antiporter could play a role in the homeostatic regulation of the plasma membrane potential in yeast cells.

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