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Article

Potassium ions and changes in bacterial DNA supercoiling under osmotic stress.

FEMS microbiology letters - 1 Dec 1992

Meury J, Kohiyama M

Abstract excerpt

Escherichia coli transiently increases both the [ATP]/[ADP] ratio and the negative supercoiling of plasmid DNA when it is shifted to high osmolarity. Here we report that a mutant lacking all saturable K+ transport systems increases the negative supercoiling of the plasmid DNA under upshock but cannot further relax DNA. The mutant dnaK756 behaves like the K+ transport mutant.

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Identifiers

PMID: 1490596
DOI: 10.1016/0378-1097(92)90018-j

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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