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. 1977 Sep;12(3):357–367. doi: 10.1128/aac.12.3.357

Comparison of the Effects of Two Lipophilic Acids, Hexachlorophene and Decanoate, on Bacillus subtilis

Barbara Chernov Levin 1, Ernst Freese 1
PMCID: PMC429919  PMID: 410363

Abstract

The minimal growth-inhibitory amount of either hexachlorophene (HCP) or decanoate stopped growth, respiration, adenosine 5′-triphosphate synthesis, and amino acid transport of Bacillus subtilis in a culture containing amino acids and citrate as carbon sources. The electron transport system was not affected by this dose. Addition of 27.8 mM glucose or 10 mM malate to an inhibited culture did not reverse the binding of HCP or decanoate to the cells, but it allowed resumption of growth, respiration, and adenosine 5′-triphosphate synthesis, as the glucose or malate then supplied the needed carbon. The addition of glucose or malate did not reverse amino acid transport inhibition caused by decanoate, but it did reverse that due to HCP. However, if the dose of HCP was raised in the presence of glucose or malate, only growth and amino acid transport were affected; this indicates that both HCP and decanoate act at their minimal growth inhibitory doses by inhibiting substrate transport. As active transport of amino acids and ketoacids depends on the proton gradient and the membrane potential of the cells, we conclude that the primary effect of these lipophilic acids is the destruction of the proton-motive force.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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