Complete Nucleotide Sequence and Comparative Analysis of PPR9, a 41.7-kilobase Conjugative Staphylococcal Multiresistance Plasmid Conferring High-level Mupirocin Resistance
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We have sequenced the conjugative plasmid pPR9, which carries the ileS2 gene, which had contributed to the dissemination of high-level mupirocin resistance at our institution. The plasmid backbone shows extensive genetic conservation with plasmids belonging to the pSK41/pGO1 family, but comparative analyses have revealed key differences that provide important insights into the evolution of these medically important plasmids and high-level mupirocin resistance in staphylococci and highlight the role of insertion sequence IS257 in these processes.
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