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Plasmid diversity and adaptation analyzed by massive sequencing of Escherichia coli plasmids

AutorToro, María de; Garcillán-Barcia, M. Pilar; Cruz, Fernando de la
Fecha de publicación2015
EditorAmerican Society for Microbiology
CitaciónPlasmids: Biology and Impact in Biotechnology and Discovery (Cap.13): 219-235 (2015)
ResumenThere are two types of evolutionary events that impinge on bacterial genomes: microevolution (mutations and homologous recombination), which produces point mutations, and macroevolution, which results in the acquisition, loss, or rearrangement of large DNA segments. Macroevolutionary events ultimately arise from the import of adaptive traits by means of mobile genetic elements (MGEs). MGEs are basically plasmids, phages, and their integrated counterparts (integrative and conjugative elements [ICEs] and prophages). Genomic islands are fossil remnants of MGEs, since they generally lost mobility by rearrangement after the initial insertion event. Nevertheless, they can sometimes still be mobilized by the recombinogenic activity of IncF plasmids, among other possibilities. In summary, the dynamics of bacterial genomes can be interpreted as resulting from the microevolution of a core genome and the macroevolution of the accessory genome, i.e., the horizontal gene transfer events that give rise to the concept of a pangenome.
Versión del editorhttp://dx.doi.org/10.1128/microbiolspec.PLAS-0031-2014
URIhttp://hdl.handle.net/10261/130772
DOI10.1128/microbiolspec.PLAS-0031-2014
ISBN9781555818975
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