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

doi:10.1016/0378-1097(92)90018-j

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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 ca...

Topics

Adenosine Diphosphate
Adenosine Triphosphate
DNA, Bacterial
DNA, Superhelical
Escherichia coli
Ion Transport
Mutation
Osmotic Pressure
Plasmids
Potassium

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