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Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae
Klebsiella pneumoniae (Kp) is one of the most important nosocomial pathogens worldwide, able to cause multiorgan infections and hospital outbreaks. One of the most widely disseminated lineage of Kp is the clonal group 258 (CG258), which includes the highly resistant “high-risk” sequence types ST258...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Oxford University Press
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6865855/ https://www.ncbi.nlm.nih.gov/pubmed/31665331 http://dx.doi.org/10.1093/gbe/evz236 |
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author | Comandatore, Francesco Sassera, Davide Bayliss, Sion C Scaltriti, Erika Gaiarsa, Stefano Cao, Xiaoli Gales, Ana C Saito, Ryoichi Pongolini, Stefano Brisse, Sylvain Feil, Edward J Bandi, Claudio |
author_facet | Comandatore, Francesco Sassera, Davide Bayliss, Sion C Scaltriti, Erika Gaiarsa, Stefano Cao, Xiaoli Gales, Ana C Saito, Ryoichi Pongolini, Stefano Brisse, Sylvain Feil, Edward J Bandi, Claudio |
author_sort | Comandatore, Francesco |
collection | PubMed |
description | Klebsiella pneumoniae (Kp) is one of the most important nosocomial pathogens worldwide, able to cause multiorgan infections and hospital outbreaks. One of the most widely disseminated lineage of Kp is the clonal group 258 (CG258), which includes the highly resistant “high-risk” sequence types ST258 and ST11. Genomic investigations revealed that very large recombination events have occurred during the emergence of Kp lineages. A striking example is provided by ST258, which has undergone a recombination event that replaced over 1 Mb of the genome with DNA from an unrelated Kp donor. Although several examples of this phenomenon have been documented in Kp and other bacterial species, the significance of these very large recombination events for the emergence of either hypervirulent or resistant clones remains unclear. Here, we present an analysis of 834 Kp genomes that provides data on the frequency of these very large recombination events (defined as those involving >100 kb), their distribution within the genome, and the dynamics of gene flow within the Kp population. We note that very large recombination events occur frequently, and in multiple lineages, and that the majority of recombinational exchanges are clustered within two overlapping genomic regions, which have been involved by recombination events with different frequencies. Our results also indicate that certain lineages are more likely to act as donors to CG258. Furthermore, comparison of gene content in CG258 and non-CG258 strains agrees with this pattern, suggesting that the success of a large recombination depends on gene composition in the exchanged genomic portion. |
format | Online Article Text |
id | pubmed-6865855 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Oxford University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-68658552019-11-25 Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae Comandatore, Francesco Sassera, Davide Bayliss, Sion C Scaltriti, Erika Gaiarsa, Stefano Cao, Xiaoli Gales, Ana C Saito, Ryoichi Pongolini, Stefano Brisse, Sylvain Feil, Edward J Bandi, Claudio Genome Biol Evol Research Article Klebsiella pneumoniae (Kp) is one of the most important nosocomial pathogens worldwide, able to cause multiorgan infections and hospital outbreaks. One of the most widely disseminated lineage of Kp is the clonal group 258 (CG258), which includes the highly resistant “high-risk” sequence types ST258 and ST11. Genomic investigations revealed that very large recombination events have occurred during the emergence of Kp lineages. A striking example is provided by ST258, which has undergone a recombination event that replaced over 1 Mb of the genome with DNA from an unrelated Kp donor. Although several examples of this phenomenon have been documented in Kp and other bacterial species, the significance of these very large recombination events for the emergence of either hypervirulent or resistant clones remains unclear. Here, we present an analysis of 834 Kp genomes that provides data on the frequency of these very large recombination events (defined as those involving >100 kb), their distribution within the genome, and the dynamics of gene flow within the Kp population. We note that very large recombination events occur frequently, and in multiple lineages, and that the majority of recombinational exchanges are clustered within two overlapping genomic regions, which have been involved by recombination events with different frequencies. Our results also indicate that certain lineages are more likely to act as donors to CG258. Furthermore, comparison of gene content in CG258 and non-CG258 strains agrees with this pattern, suggesting that the success of a large recombination depends on gene composition in the exchanged genomic portion. Oxford University Press 2019-11-02 /pmc/articles/PMC6865855/ /pubmed/31665331 http://dx.doi.org/10.1093/gbe/evz236 Text en © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution. http://creativecommons.org/licenses/by-nc/4.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com |
spellingShingle | Research Article Comandatore, Francesco Sassera, Davide Bayliss, Sion C Scaltriti, Erika Gaiarsa, Stefano Cao, Xiaoli Gales, Ana C Saito, Ryoichi Pongolini, Stefano Brisse, Sylvain Feil, Edward J Bandi, Claudio Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title | Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title_full | Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title_fullStr | Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title_full_unstemmed | Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title_short | Gene Composition as a Potential Barrier to Large Recombinations in the Bacterial Pathogen Klebsiella pneumoniae |
title_sort | gene composition as a potential barrier to large recombinations in the bacterial pathogen klebsiella pneumoniae |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6865855/ https://www.ncbi.nlm.nih.gov/pubmed/31665331 http://dx.doi.org/10.1093/gbe/evz236 |
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