title: Molecular cloning and characterization of a multidrug efflux pump, SmfY, from Serratia marcescens.
abstract: We cloned a gene smfY for multidrug efflux pump from chromosomal DNA of Serratia marcescens using drug-hypersensitive Escherichia coli KAM32 as the host, and characterized the pump. E. coli KAM32/pESM42 carrying the smfY showed significantly increased MICs of various drugs including DAPI, norfloxacin, benzalkonium chloride, acriflavine and ethidium bromide, compared with the control. We also detected energy-dependent ethidium and acriflavine efflux due to the SmfY. Sequence analysis revealed that the SmfY was a multidrug efflux pump of the MF (Major Facilitator) superfamily transporters. This is the first report of a multidrug efflux pump belonging to the MF superfamily in S. marcescens.
authors.affiliation: Department of Molecular Microbiology, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Japan.
authors.forename: Fereshteh
authors.initials: F
authors.lastname: Shahcheraghi
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Minato
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Tohru
authors.initials: T
authors.lastname: Mizushima
authors.forename: Wakano
authors.initials: W
authors.lastname: Ogawa
authors.forename: Teruo
authors.initials: T
authors.lastname: Kuroda
authors.forename: Tomofusa
authors.initials: T
authors.lastname: Tsuchiya
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D017920:Antiporters / Q000235:genetics* / Q000378:metabolism; D001426:Bacterial Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D001483:Base Sequence; D002876:Chromosomes, Bacterial / Q000737:chemistry; D003001:Cloning, Molecular; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D024901:Drug Resistance, Multiple, Bacterial / Q000235:genetics*; D004926:Escherichia coli / Q000235:genetics; D004996:Ethidium / Q000378:metabolism; D005456:Fluorescent Dyes / Q000378:metabolism; D005798:Genes, Bacterial; D007211:Indoles / Q000378:metabolism; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D012706:Serratia marcescens / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism
chemical_list: D000900:Anti-Bacterial Agents; D017920:Antiporters; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D005456:Fluorescent Dyes; D007211:Indoles; C007293:DAPI; D004996:Ethidium