[Coupling of energy-dependent H+ and K+ ion fluxes in Streptococcus faecalis].
Grampositive bacteria S. faecalis are capable of uptaking potassium ions during many hours in the media containing glucose. Such behaviour of K+-uptake indicates that this system is not regulated as it takes place in gramnegative bacteria E. coli (1,3). The stoichimetry of DCCD-sensitive exchange between H+ and K+ ions equals 2:1. It is possible that S. faecalis possesses an electrogenic proton-potassium pump which can exchange 2H+ from the cell for external K+.
D002463:Cell Membrane Permeability / Q000187:drug effects; D004024:Dicyclohexylcarbodiimide / Q000494:pharmacology; D013293:Enterococcus faecalis / Q000378:metabolism*; D006859:Hydrogen / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*
D004024:Dicyclohexylcarbodiimide; D006859:Hydrogen; D011188:Potassium
Sopriazhennost' énergozavisimykh potokov ionov H+ i K+ u Streptococcus faecalis.