title: A multidrug efflux transporter in Listeria monocytogenes.
abstract: A chromosomal gene (mdrL) was found in Listeria monocytogenes L028, showing a high degree of similarity with multidrug efflux transporters of the major facilitator superfamily (family 2). An allele-substituted mutant of this gene failed to pump out ethidium bromide and presented lower minimal inhibitory concentrations of macrolides, cefotaxime and heavy metals. This is the first multidrug efflux pump described in Listeria.
authors.affiliation: Department of Microbiology, Ramón y Cajal Hospital, National Institute of Health, Crta. Colmenar Km 9,1, 28034, Madrid, Spain.
authors.forename: M T
authors.initials: MT
authors.lastname: Mata
authors.forename: F
authors.initials: F
authors.lastname: Baquero
authors.forename: J C
authors.initials: JC
authors.lastname: Pérez-Díaz
mesh_terms: D018435:ATP Binding Cassette Transporter, Subfamily B / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001426:Bacterial Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D004352:Drug Resistance, Microbial / Q000235:genetics; D018432:Drug Resistance, Multiple / Q000235:genetics; D004996:Ethidium / Q000378:metabolism; D008089:Listeria monocytogenes / Q000187:drug effects* / Q000235:genetics / Q000378:metabolism; D019216:Metals, Heavy / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D009154:Mutation
chemical_list: D018435:ATP Binding Cassette Transporter, Subfamily B; D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D019216:Metals, Heavy; D004996:Ethidium