pH dependence of the function of sodium ion extrusion systems in Escherichia coli.

doi:10.1016/s0005-2728(97)00102-3

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Article

pH dependence of the function of sodium ion extrusion systems in Escherichia coli.

Biochimica et biophysica acta - 25 Mar 1998

Sakuma T, Yamada N, Saito H, Kakegawa T, Kobayashi H

Abstract excerpt

Escherichia coli has three systems for sodium ion extrusion, NhaA, NhaB and ChaA. In this study, we examined the effect of pH on the function of these transporters using mutants having one of them, and found that (1) a mutant having NhaB excreted sodium ions at pH 7.5 but not at pH 8.5, (2) the e...

Topics

Escherichia coli
Hydrogen-Ion Concentration
Mutation
Sodium
Sodium-Hydrogen Exchangers

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