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ABSTRACT: Citrobacter freundii producing OXA-48, complete genome

PROVIDER: PRJNA579943 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR10392216_1.fastq.gz	Fastqsanger.gz
	SRR10392216_2.fastq.gz	Fastqsanger.gz
	SRR10392217_1.fastq.gz	Fastqsanger.gz

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Project description:Conjugative plasmids are the main vehicle for the horizontal spread of antimicrobial resistance (AMR). Although AMR plasmids provide advantages to their hosts under antibiotic pressure, they can also disrupt the cell’s regulatory network, impacting the fitness of their hosts. Despite the importance of plasmid-bacteria interactions on the evolution of AMR, the effects of plasmid carriage on host physiology has remained underexplored, and most studies have focused on model bacteria and plasmids that lack clinical relevance. Here, we analyzed the transcriptional response of 11 clinical enterobacterial strains (2 Escherichia coli, 1 Citrobacter freundii and 8 Klebsiella spp.) and the laboratory-adapted E. coli MG1655 to carriage of pOXA-48, one of the most widely spread carbapenem-resistance plasmids. Our analyses revealed that pOXA-48 produces variable responses on their hosts, but commonly affects processes related to metabolism, transport, response to stimulus, cellular organization and motility. More notably, the presence of pOXA-48 caused an increase in the expression of a small chromosomal operon of unknown function in Klebsiella spp. and C. freundii, which is not present in E. coli. Phylogenetic analysis suggested that this operon has been horizontally mobilized across different Proteobacteria species. We demonstrate that a pOXA-48-encoded LysR transcriptional regulator controls the expression of the operon in Klebsiella spp. and C. freundii. In summary, our results highlight a crosstalk between pOXA-48 and the chromosome of its natural hosts.

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Project description:Persistence of OXA-48-producing ST-22 Citrobacter freundii in patients and the hospital environment between 2016 and 2022

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