title: beta-lactamase gene promoters of 71 clinical strains of Klebsiella oxytoca.
abstract: beta-Lactamase gene promoters of 45 clinical Klebsiella oxytoca isolates resistant to beta-lactams and exhibiting beta-lactamase hyperproduction differed from those in 26 susceptible strains. Direct sequencing revealed one mutation in either the -10 or -35 conserved sequences: a G-to-A transition of the fifth base (67%) or a G-to-T transversion of the first base of the -10 sequence (27%) or a T-to-A transversion in the fourth base in the -35 sequence (4%). One strain carried both the -10 transition and the -35 transversion.
authors.affiliation: Laboratoire de Microbiologie, Université Paris VII, France.
authors.forename: B
authors.initials: B
authors.lastname: Fournier
authors.forename: P H
authors.initials: PH
authors.lastname: Lagrange
authors.forename: A
authors.initials: A
authors.lastname: Philippon
mesh_terms: D001483:Base Sequence; D004591:Electrophoresis, Polyacrylamide Gel; D005060:Europe; D007709:Klebsiella / Q000201:enzymology / Q000235:genetics* / Q000302:isolation & purification; D008826:Microbial Sensitivity Tests; D008969:Molecular Sequence Data; D009154:Mutation; D011401:Promoter Regions, Genetic; D012689:Sequence Homology, Nucleic Acid; D014481:United States; D018440:beta-Lactam Resistance / Q000235:genetics*; D001618:beta-Lactamases / Q000235:genetics*
chemical_list: D001618:beta-Lactamases