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Article

Mechanism of osmotic activation of the quaternary ammonium compound transporter (QacT) of Lactobacillus plantarum.

Journal of bacteriology - 1 Nov 1998

Glaasker E, Heuberger E H, Konings W N, Poolman B

Abstract excerpt

The accumulation of quaternary ammonium compounds in Lactobacillus plantarum is mediated via a single transport system with a high affinity for glycine betaine (apparent Km of 18 microM) and carnitine and a low affinity for proline (apparent Km of 950 microM) and other analogues. Mutants defective in the uptake of glycine betaine were generated by UV irradiation and selected on the basis of resistance to...

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Identifiers

PMID: 9791101
DOI: 10.1128/JB.180.21.5540-5546.1998
PMCID: PMC107610

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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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Mechanism of osmotic activation of the quaternary ammonium compound transporter (QacT) of Lactobacillus plantarum.PMID 9791101Read ↗

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Enhanced uptake of potassium or glycine betaine or export of cyclic-di-AMP restores osmoresistance in a high cyclic-di-AMP Lactococcus lactis mutant.Semantic proximity Read ↗

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