Ktr-mediated potassium transport, a major pathway for potassium uptake, is coupled to a proton gradient across the membrane in Synechocystis sp. PCC 6803.
Synechocystis sp. PCC 6803 contains a Ktr system and a putative ATP-dependent Kdp system for potassium uptake. We report here that the Kdp system plays only a minor role in potassium uptake under salt and non-stress conditions, unlike the role it plays in Escherichia coli. In Synechocystis, Ktr-mediated potassium transport is dependent on the proton gradient across the membrane.
Matsuda
Nobuyuki
N
Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan.
Uozumi
Nobuyuki
N
D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D027682:Cation Transport Proteins / Q000235:genetics / Q000378:metabolism*; D002462:Cell Membrane / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D011522:Protons; D046939:Synechocystis / Q000145:classification / Q000166:cytology* / Q000235:genetics / Q000378:metabolism*
D001426:Bacterial Proteins; D027682:Cation Transport Proteins; D011522:Protons; D011188:Potassium