Antirestriction activity of the mercury resistance nonconjugative transposon Tn5053 is controlled by the protease ClpXP

Antirestriction activity of the mercury resistance nonconjugative transposon Tn5053 is controlled... When transformed into Escherichia coli K12 strains, the mercury resistance transposon Tn5053 exhibits high antirestriction activity against the EcoKI type I restriction and modification system. The products of the genes merR and ardD contribute to the antirestriction activity of Tn5053. The merR gene encodes the MerR protein, the transcription regulator of the mer operon genes. The ardD gene is responsible for ArdD protein synthesis and is located within the tni operon. In the following study, it was demonstrated that the antirestriction activity of the transposon Tn5053 is absent in E. coli K12 strains with the mutant genes clpX, clpP, and recA. The antirestriction effect of Tn5053 is not enhanced by 2-aminopurine. The Tn5053 antirestriction activity is not altered in E. coli K12 with the mutant dam gene; however, it is decreased in the E. coli K12 mutD. It is assumed that the activities of the MerR and ArdD proteins lead to the formation of a significant amount of unmodified DNA in the bacterial cell, causing the SOS-dependent reduction of the EcoKI (R2M2S) enzyme activity associated with ClpXP-induced proteolysis of the R-subunit. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

Antirestriction activity of the mercury resistance nonconjugative transposon Tn5053 is controlled by the protease ClpXP

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Publisher
Pleiades Publishing
Copyright
Copyright © 2014 by Pleiades Publishing, Inc.
Subject
Biomedicine; Human Genetics; Animal Genetics and Genomics; Microbial Genetics and Genomics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795414090166
Publisher site
See Article on Publisher Site

Abstract

When transformed into Escherichia coli K12 strains, the mercury resistance transposon Tn5053 exhibits high antirestriction activity against the EcoKI type I restriction and modification system. The products of the genes merR and ardD contribute to the antirestriction activity of Tn5053. The merR gene encodes the MerR protein, the transcription regulator of the mer operon genes. The ardD gene is responsible for ArdD protein synthesis and is located within the tni operon. In the following study, it was demonstrated that the antirestriction activity of the transposon Tn5053 is absent in E. coli K12 strains with the mutant genes clpX, clpP, and recA. The antirestriction effect of Tn5053 is not enhanced by 2-aminopurine. The Tn5053 antirestriction activity is not altered in E. coli K12 with the mutant dam gene; however, it is decreased in the E. coli K12 mutD. It is assumed that the activities of the MerR and ArdD proteins lead to the formation of a significant amount of unmodified DNA in the bacterial cell, causing the SOS-dependent reduction of the EcoKI (R2M2S) enzyme activity associated with ClpXP-induced proteolysis of the R-subunit.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Sep 23, 2014

References

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