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Volume 66, Issue 11

pheromone s.g.cAM373 may influence the reservoir of antibiotic resistance determinants of origin in the oral metagenome Free

Abstract

produces a pheromone heptapeptide, s.g.cAM373, which induces a conjugative mating response in cells carrying the responsive plasmid, pAM373. We investigated the extent of this intergeneric signaling on DNA acquisition by streptococcal species likely to cohabit oral biofilms. /pAM373/pAMS470 cells were incubated with synthetic s.g.cAM373, reverse peptide s.g.cAM373-R, or peptide-free medium and examined for their abilities to transfer plasmid DNA to streptococcal species in the presence of DNase. Preinduction of donors with s.g.cAM373 resulted in transconjugation frequencies in non-pheromone producing strains of , , , and that were significantly higher than frequencies when donors were preincubated with s.g.cAM373-R or medium alone. Peptide-mediated communication between commensal streptococci and carrying pheromone-responsive plasmids may facilitate conjugative DNA transfer to bystander species, and influence the reservoir of antibiotic resistance determinants of enterococcal origin in the oral metagenome.

  • Received:
  • Accepted:
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Keyword(s): antibiotic resistance , biofilm , commensal streptococci , Enterococcus faecalis , oral microbiology , pheromone , plasmid transfer and signaling
© 2017 The Authors
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2017-11-01
2024-04-16
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Streptococcus gordonii pheromone s.g.cAM373 may influence the reservoir of antibiotic resistance determinants of Enterococcus faecalis origin in the oral metagenome
J. Med. Microbiol. 66, 1635 (2017); https://doi.org/10.1099/jmm.0.000613
/content/journal/jmm/10.1099/jmm.0.000613
/content/journal/jmm/10.1099/jmm.0.000613
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