Cs+ induces the kdp operon of Escherichia coli by lowering the intracellular K+ concentration

Autor(en): Jung, K
Krabusch, M
Altendorf, K 
Stichwörter: ATPASE; EXPRESSION; KUP; MECHANISMS; Microbiology; POTASSIUM-TRANSPORT LOCI; PROMOTERS; SIGNAL; TURGOR; UPTAKE SYSTEM
Erscheinungsdatum: 2001
Herausgeber: AMER SOC MICROBIOLOGY
Journal: JOURNAL OF BACTERIOLOGY
Volumen: 183
Ausgabe: 12
Startseite: 3800
Seitenende: 3803
Zusammenfassung: 
Cs+ mas found to induce expression of the kdpFABC operon, encoding a high-affinity K+ uptake system of Escherichia coli. Quantitative expression analyses at the transcriptional and translational levels reveal that CsCI causes much higher induction of kdpFABC than does NaCl. A decrease of the intracellular K+ concentration is found in cells exposed to CsCI. The results indicate that kdpFABC expression is induced when the intracellular K+ concentration is lowered. Moreover, the results imply that the signal transduction cascade mediated by KdpD and KdpE is able to integrate multiple signals.
ISSN: 00219193
DOI: 10.1128/JB.183.12.3800-3803.2001

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