Potassium transport in Escherichia coli: diverse systems with common control by osmotic forces

Wolfgang Epstein, Laimonis Laimins

Research output: Contribution to journalReview articlepeer-review

71 Scopus citations

Abstract

Genetic analysis reveals two very different K+ transport systems in E. coli. The Kdp system has a high affinity for K+, is driven by ATP, and consists entirely of inner membrane proteins. The genetic expression of the Kdp system is regulated by the turgor pressure. In contrast, the TrkA system has a low affinity for K+, is genetically complex, and requires the protonmotive force in addition to ATP for energization. Transport activity of both systems is osmotically regulated; reduced turgor pressure stimulates K+ uptake.

Original languageEnglish (US)
Pages (from-to)21-23
Number of pages3
JournalTrends in Biochemical Sciences
Volume5
Issue number1
DOIs
StatePublished - Jan 1980

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology

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