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Ambroset C, Coluzzi C, Guédon G, et al. New Insights into the Classification and Integration Specificity of Streptococcus Integrative Conjugative Elements through Extensive Genome Exploration. Front Microbiol. 2016;6:1483doi: 10.3389/fmicb.2015.01483.
Ambroset, C., Coluzzi, C., Guédon, G., Devignes, M. D., Loux, V., Lacroix, T., Payot, S., & Leblond-Bourget, N. (2015). New Insights into the Classification and Integration Specificity of Streptococcus Integrative Conjugative Elements through Extensive Genome Exploration. Frontiers in microbiology, 61483. https://doi.org/10.3389/fmicb.2015.01483
Ambroset, Chloé, et al. "New Insights into the Classification and Integration Specificity of Streptococcus Integrative Conjugative Elements through Extensive Genome Exploration." Frontiers in microbiology vol. 6 (2015): 1483. doi: https://doi.org/10.3389/fmicb.2015.01483
Ambroset C, Coluzzi C, Guédon G, Devignes MD, Loux V, Lacroix T, Payot S, Leblond-Bourget N. New Insights into the Classification and Integration Specificity of Streptococcus Integrative Conjugative Elements through Extensive Genome Exploration. Front Microbiol. 2016 Jan 06;6:1483. doi: 10.3389/fmicb.2015.01483. eCollection 2015. PMID: 26779141; PMCID: PMC4701971.
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Front Microbiol. 2016 Jan 06;6:1483. doi: 10.3389/fmicb.2015.01483. eCollection 2015.

New Insights into the Classification and Integration Specificity of Streptococcus Integrative Conjugative Elements through Extensive Genome Exploration.

Frontiers in microbiology

Chloé Ambroset, Charles Coluzzi, Gérard Guédon, Marie-Dominique Devignes, Valentin Loux, Thomas Lacroix, Sophie Payot, Nathalie Leblond-Bourget

Affiliations

  1. DynAMic, Faculté des Sciences et Technologies, Université de Lorraine, UMR 1128Vandœuvre-lès-Nancy, France; DynAMic, Institut National de la Recherche Agronomique, UMR 1128Vandœuvre-lès-Nancy, France.
  2. Laboratoire Lorrain de Recherche en Informatique et ses Applications, Faculté des Sciences et Technologies, Université de Lorraine, UMR 7503Vandœuvre-lès-Nancy, France; CNRS, Laboratoire Lorrain de Recherche en Informatique et ses Applications, UMR 7503Vand?uvre-lès-Nancy, France.
  3. UR 1404 Mathématiques et Informatique Appliquées du Génome à l'Environnement, Institut National de la Recherche Agronomique Jouy-en-Josas, France.

PMID: 26779141 PMCID: PMC4701971 DOI: 10.3389/fmicb.2015.01483

Abstract

Recent genome analyses suggest that integrative and conjugative elements (ICEs) are widespread in bacterial genomes and therefore play an essential role in horizontal transfer. However, only a few of these elements are precisely characterized and correctly delineated within sequenced bacterial genomes. Even though previous analysis showed the presence of ICEs in some species of Streptococci, the global prevalence and diversity of ICEs was not analyzed in this genus. In this study, we searched for ICEs in the completely sequenced genomes of 124 strains belonging to 27 streptococcal species. These exhaustive analyses revealed 105 putative ICEs and 26 slightly decayed elements whose limits were assessed and whose insertion site was identified. These ICEs were grouped in seven distinct unrelated or distantly related families, according to their conjugation modules. Integration of these streptococcal ICEs is catalyzed either by a site-specific tyrosine integrase, a low-specificity tyrosine integrase, a site-specific single serine integrase, a triplet of site-specific serine integrases or a DDE transposase. Analysis of their integration site led to the detection of 18 target-genes for streptococcal ICE insertion including eight that had not been identified previously (ftsK, guaA, lysS, mutT, rpmG, rpsI, traG, and ebfC). It also suggests that all specificities have evolved to minimize the impact of the insertion on the host. This overall analysis of streptococcal ICEs emphasizes their prevalence and diversity and demonstrates that exchanges or acquisitions of conjugation and recombination modules are frequent.

Keywords: Streptococcus; T4SS; integrase; integration site; integrative and conjugative elements

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