Russian Journal of Genetics

, Volume 40, Issue 12, pp 1426–1429 | Cite as

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

  • Zh. M. Gorlenko
  • E. S. Kalyaeva
  • I. A. Bass
  • M. A. Petrova
  • S. Z. Mindlin
Short Communications


The distribution of noncanonical 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 ∑ 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 Tn5044- and Tn5070-specific probes. A concept on the existence of cosmopolite, endemic, and rare transposons in environmental bacterial populations was formulated.


Mercury Bacterial Strain Characteristic Feature Geographical Region Structural Organization 
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Copyright information

© MAIK “Nauka/Interperiodica” 2004

Authors and Affiliations

  • Zh. M. Gorlenko
    • 1
  • E. S. Kalyaeva
    • 1
  • I. A. Bass
    • 1
  • M. A. Petrova
    • 1
  • S. Z. Mindlin
    • 1
  1. 1.Institute of Molecular GeneticsRussian Academy of SciencesMoscowRussia

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