| Abstrakt: |
The transport of protons and potassium ions across the membranes of the bacteria Enterococcus hirae growing in an alkaline medium (pH 8.0) or under experimental conditions (pH 7.5) during glucose fermentation accomplished by a KtrI system of absorption of potassium ions, which can interact with FF-ATPase to form at H-K-pump, has been studied. It was found on cells with a high membrane permeability that the administration of nicotinamide adenine dinucleotides results in the potassium absorption which is insensitive to the inhibitor of FF-ATPase N,N′-dicyclohexylcarbodiimide. It is assumed that, along with the KtrI system which interacts with FF-ATPase, a separate KtrI or another K absorption system operates in these bacteria under particular conditions, which is dependent on NAD +NADH. Presumably, these interact with this system, changing its conformational state required for the transition to the 'active' form. [ABSTRACT FROM AUTHOR] |
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