[Characteristics of K+ uptake in S. enteritidis bacteria].
Bacterial Salmonella enteritidis var. Issatchenko in media without exogenic energy source uptakes K+ in one step with Km 2.1 mM and Vmax 0.08 mM min-1/10(12) cells. This K+ uptake does not depend on pH and osmotic shock and is not inhibited by DCC. Endogenic energy source (glucose) leads to K+ uptake with Km 2.8 mM and Vmax 0.10 mM min-1/10(12) cells, and secretion of H+. The ratio of the DCC-sensitive fluxes of H+ to K+ equals 2. Arsenate and protonophores depress the K+ uptake. Valinomycin decreases the rate of K+ uptake. It is assumed that K+ uptake takes place via the Trk-like system, which works as a separate system as supercomplex with the H+-ATPase complex.
D001149:Arsenates / Q000494:pharmacology; D011188:Potassium / Q000493:pharmacokinetics*; D006180:Proton-Translocating ATPases / Q000378:metabolism; D012477:Salmonella enteritidis / Q000254:growth & development / Q000378:metabolism*
D001149:Arsenates; D006180:Proton-Translocating ATPases; D011188:Potassium
Osobennosti pogloshcheniia K+ u bakteriĭ S. enteritidis.