Journal
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
Volume 45, Issue 4, Pages 1109-1114Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.45.4.1109-1114.2001
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- NIGMS NIH HHS [GM 51661] Funding Source: Medline
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The mdt(A) gene, previously designated mef214, from Lactococcus lactis subsp, lactis plasmid pK214 encodes a protein [Mdt(A) (multiple drug transporter)] with 12 putative transmembrane segments (TMS) that contain typical motifs conserved among the efflux proteins of the major facilitator superfamily, However, it also has two C-motifs (conserved in the fifth TMS of the antiporters) and a putative ATP-binding site. Expression of the cloned mdt(A) gene decreased susceptibility to macrolides, lincosamides, streptogramins, and tetracyclines in L. lactis and Escherichia coli, but not in Enterococcus faecalis or in Staphylococcus aureus, Glucose-dependent efflux of erythromycin and tetracycline was demonstrated in L. lactis and in E. coli.
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