title: Detection and characterization of an ABC transporter in Clostridium hathewayi.
abstract: An ABC transporter gene from Clostridium hathewayi is characterized. It has duplicated ATPase domains in addition to a transmembrane protein. Its deduced amino acid sequence has conserved functional domains with ATPase components of the multidrug efflux pump genes of several bacteria. Cloning this transporter gene into C. perfringens and E. coli resulted in decreased sensitivities of these bacteria to fluoroquinolones. It also decreased the accumulation and increased the efflux of ethidium bromide from cells containing the cloned gene. Carbonyl cyanide-m-chlorophenylhydrazone (CCCP) inhibited both accumulation and efflux of ethidium bromide from these cells. The ATPase mRNA was overexpressed in the fluoroquinolone-resistant strain when exposed to ciprofloxacin. This is the first report of an ABC transporter in C. hathewayi.
authors.affiliation: Division of Microbiology, National Center for Toxicological Research, FDA, Jefferson, AR 72079, USA. fatemeh.rafii@fda.hhs.gov
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Rafii
authors.forename: Miseon
authors.initials: M
authors.lastname: Park
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics* / Q000378:metabolism*; D000251:Adenosine Triphosphatases / Q000235:genetics / Q000378:metabolism; D000595:Amino Acid Sequence; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001426:Bacterial Proteins / Q000187:drug effects / Q000235:genetics* / Q000378:metabolism*; D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone / Q000494:pharmacology; D003001:Cloning, Molecular; D003013:Clostridium / Q000235:genetics* / Q000378:metabolism*; D017124:Conserved Sequence; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004926:Escherichia coli / Q000235:genetics; D004996:Ethidium / Q000378:metabolism; D024841:Fluoroquinolones / Q000494:pharmacology; D020869:Gene Expression Profiling; D008969:Molecular Sequence Data; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014475:Uncoupling Agents / Q000494:pharmacology
chemical_list: D018528:ATP-Binding Cassette Transporters; D000900:Anti-Bacterial Agents; D001426:Bacterial Proteins; D004269:DNA, Bacterial; D024841:Fluoroquinolones; D014475:Uncoupling Agents; D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone; D000251:Adenosine Triphosphatases; D004996:Ethidium