Distribution of transposons Tn5044 and Tn5070 with noncanonical mer operons in environmental bacterial populations

Autor: Zh. M. Gorlenko, Mayya Petrova, E. S. Kalyaeva, Sofia Mindlin, I. A. Bass
Rok vydání: 2004
Předmět:
Zdroj: Russian Journal of Genetics. 40:1426-1429
ISSN: 1608-3369
1022-7954
Popis: 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.
Databáze: OpenAIRE