Immediate and transient inhibition of the respiration of Escherichia coli under hyperosmotic shock.
The respiration of Escherichia coli is severely inhibited, during hyperosmotic stress period, as a consequence of plasmolysis; deplasmolysis allows the cell to recover respiration. A mutant lacking all K+ transport systems can neither deplasmolyze nor recover respiration unless betaine is present in the medium. Betaine, in these conditions, increases both cytoplasmic volume and respiration; this suggests a control of respiration by cytoplasmic volume.
Meury
J
J
Biochimie Génétique, Institut Jacques Monod, Paris, France.
D001622:Betaine / Q000494:pharmacology; D003593:Cytoplasm / Q000187:drug effects / Q000378:metabolism; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics / Q000378:metabolism*; D017136:Ion Transport; D009154:Mutation; D009997:Osmotic Pressure; D010101:Oxygen Consumption / Q000187:drug effects; D011188:Potassium / Q000378:metabolism; D013696:Temperature
D001622:Betaine; D011188:Potassium