title: [Distribution of transposons Tn5044 and Tn5070 with unusual mer operons in environmental bacterial populations].
abstract: The distribution of unusual mercury resistance transposons, Tn5044 and Tn5070, was examined. A characteristic feature of Tn5044 is temperature sensitivity of its mercury operon and the presence in the mer operon of the gene homologous to RNA polymerase a subunit. Structural organization of mercury operon Tn5070, containing minimum gene set (merRTPA), differs from mer operons of both Gram-negative and Gram-positive bacteria. None of more than two thousand environmental bacterial strains displaying mercury resistance and isolated from the samples selected from different geographical regions hybridized to Tn5040- and Tn5070-specific probes. A concept on the existence of cosmopolite, endemic, and rare transposons in environmental bacterial populations was formulated.
authors.forename: Zh M
authors.initials: ZhM
authors.lastname: Gorlenko
authors.forename: é S
authors.initials: éS
authors.lastname: Kaliaeva
authors.forename: I A
authors.initials: IA
authors.lastname: Bass
authors.forename: M A
authors.initials: MA
authors.lastname: Petrova
authors.forename: S Z
authors.initials: SZ
authors.lastname: Mindlin
mesh_terms: D004251:DNA Transposable Elements / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics*; D024881:Drug Resistance, Bacterial / Q000235:genetics*; D004783:Environmental Microbiology; D006090:Gram-Negative Bacteria / Q000235:genetics*; D006094:Gram-Positive Bacteria / Q000235:genetics*; D008628:Mercury; D009876:Operon / Q000235:genetics*
chemical_list: D004251:DNA Transposable Elements; D004269:DNA, Bacterial; D008628:Mercury