valinomycin and tellurous-acid

valinomycin has been researched along with tellurous-acid* in 1 studies

Other Studies

1 other study(ies) available for valinomycin and tellurous-acid

Article	Year
Tellurite uptake by cells of the facultative phototroph Rhodobacter capsulatus is a Delta pH-dependent process. FEBS letters, 2003, Nov-20, Volume: 554, Issue:3 The uptake by light-grown cells of Rhodobacter capsulatus of the highly toxic metalloid oxyanion tellurite (TeO(3)(2-)) was examined. We show that tellurite is rapidly taken up by illuminated cells in a process which is inhibited by the protonophore carbonyl cyanide-p-trifluoromethoxyphenyl-hydrazone (FCCP) and by the K(+)/H(+) exchanger nigericin. Notably, the light-driven membrane potential (Delta psi) is enhanced by K(2)TeO(3)> or =200 microM. Further, tellurite uptake is largely insensitive to valinomycin, strongly repressed by the sulfhydryl reagent N-ethylethylmaleimide (NEM) and competitively inhibited by phosphate. We conclude that tellurite is transported into cells by a Delta pH-dependent, non-electrogenic process which is likely to involve the phosphate transporter (PiT family). Topics: Biological Transport; Carbonyl Cyanide p-Trifluoromethoxyphenylhydrazone; Electrochemistry; Ethylmaleimide; Kinetics; Light; Membrane Potentials; Nigericin; Onium Compounds; Organophosphorus Compounds; Oxygen; Proton-Motive Force; Rhodobacter capsulatus; Tellurium; Valinomycin	2003

Article

Year

Tellurite uptake by cells of the facultative phototroph Rhodobacter capsulatus is a Delta pH-dependent process.

FEBS letters, 2003, Nov-20, Volume: 554, Issue:3

The uptake by light-grown cells of Rhodobacter capsulatus of the highly toxic metalloid oxyanion tellurite (TeO(3)(2-)) was examined. We show that tellurite is rapidly taken up by illuminated cells in a process which is inhibited by the protonophore carbonyl cyanide-p-trifluoromethoxyphenyl-hydrazone (FCCP) and by the K(+)/H(+) exchanger nigericin. Notably, the light-driven membrane potential (Delta psi) is enhanced by K(2)TeO(3)> or =200 microM. Further, tellurite uptake is largely insensitive to valinomycin, strongly repressed by the sulfhydryl reagent N-ethylethylmaleimide (NEM) and competitively inhibited by phosphate. We conclude that tellurite is transported into cells by a Delta pH-dependent, non-electrogenic process which is likely to involve the phosphate transporter (PiT family).

Topics: Biological Transport; Carbonyl Cyanide p-Trifluoromethoxyphenylhydrazone; Electrochemistry; Ethylmaleimide; Kinetics; Light; Membrane Potentials; Nigericin; Onium Compounds; Organophosphorus Compounds; Oxygen; Proton-Motive Force; Rhodobacter capsulatus; Tellurium; Valinomycin

2003