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The IncP-6 Plasmid P10265-KPC from Pseudomonas Aeruginosa Carries a Novel ΔISEc33-Associated Bla KPC-2 Gene Cluster

Overview
Journal Front Microbiol
Specialty Microbiology
Date 2016 Mar 26
PMID 27014233
Citations 35
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Abstract

Pseudomonas aeruginosa strain 10265 was recovered from a patient with pneumonia in a Chinese public hospital, and it displays the carbapenem resistance phenotype due to the acquisition of a non-conjugative but mobilizable IncP-6-type plasmid p10265-KPC. p10265-KPC carries a Tn5563-borne defective mer locus, and a novel ΔISEc33-associated bla KPC-2 gene cluster without paired inverted repeats and paired direct repeats at both ends. Mobilization of this ΔISEc33-associated element in p10265-KPC would be attributed to homologous recombination-based insertion of a foreign structure Tn3-ISApu1-orf7-ISApu2- ISKpn27-Δbla TEM-1 -bla KPC-2 -ΔISKpn6- korC-orf6-klcA-ΔrepB into a pre-existent intact ISEc33, making ISEc33 truncated at the 3' end. The previously reported pCOL-1 represents the first sequenced KPC-producing IncP-6 plasmid, while p10265-KPC is the second one. These two plasmids carry two distinct bla KPC-2 gene clusters, which are inserted into the different sites of the IncP-6 backbone and have different evolutionary histories of assembly and mobilization. This is the first report of identification of the IncP-6-type resistance plasmid in China.

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