Present-day mercury resistance transposons are common in bacteria preserved in permafrost grounds since the Upper Pleistocene

Res Microbiol. 2005 Dec;156(10):994-1004. doi: 10.1016/j.resmic.2005.05.011. Epub 2005 Jul 18.

Abstract

Transposons closely related to mercury resistance transposons Tn5041, Tn5053, and Tn5056, which have been previously described in present-day bacteria, were detected in a survey of 12 mercury-resistant Pseudomonas strains isolated from permafrost samples aged 15-40 thousand years. In addition, Tn5042, a novel type of mercury resistance transposon, was revealed in the permafrost strain collection and its variants found to be common among present-day bacteria. The results reveal that no drastic changes in the distribution mode of the different types of mercury resistance transposons among environmental bacteria have taken place in the last 15-40 thousand years.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Proteins / genetics
  • Base Sequence
  • DNA Transposable Elements* / genetics
  • Drug Resistance, Bacterial / genetics*
  • Geologic Sediments / microbiology*
  • Ice*
  • Mercury / pharmacology*
  • Molecular Sequence Data
  • Operon
  • Paleontology
  • Pseudomonas / drug effects*
  • Pseudomonas / genetics
  • Pseudomonas / isolation & purification
  • Pseudomonas fluorescens / drug effects
  • Pseudomonas fluorescens / genetics
  • Pseudomonas fluorescens / isolation & purification
  • Pseudomonas putida / drug effects
  • Pseudomonas putida / genetics
  • Pseudomonas putida / isolation & purification

Substances

  • Bacterial Proteins
  • DNA Transposable Elements
  • Ice
  • Mercury