The incC sequence is required for R27 plasmid stability

IncHI plasmids account for multiple antimicrobial resistance in Salmonella and other enterobacterial genera. These plasmids are generally very stable in their bacterial hosts. R27 is the archetype of IncHI1 plasmids. A high percentage of the R27-encoded open reading frames (ORFs) (66.7%) do not show...

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Published in:Frontiers in microbiology 2016-05
Main Authors: Tassinari, Eleonora, Aznar Vicente, Sonia, Urcola, Imanol, Prieto, Alejandro, Hüttener Queiroz, Mário, Juárez Giménez, Antonio
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Amino acid sequence
Plasmidis
Plasmids
Seqüència d'aminoàcids
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Aznar Vicente, Sonia
Urcola, Imanol
Prieto, Alejandro
Hüttener Queiroz, Mário
Juárez Giménez, Antonio
description IncHI plasmids account for multiple antimicrobial resistance in Salmonella and other enterobacterial genera. These plasmids are generally very stable in their bacterial hosts. R27 is the archetype of IncHI1 plasmids. A high percentage of the R27-encoded open reading frames (ORFs) (66.7%) do not show similarity to any known ORFs. We performed a deletion analysis of all non-essential R27 DNA sequences to search for hitherto non-identified plasmid functions that might be required for plasmid stability. We report the identification of a short DNA sequence (incC) that is essential for R27 stability. That region contains several repeats (incC repeats), belongs to one of the three-plasmid replicons (R27 FIA-like) and is targeted by the R27 E protein. Deletion of the incC sequence drastically reduces R27 stability both in Escherichia coli and in Salmonella, the effect being more pronounced in this latter species. Interfering with incC-E protein interaction must lead to a reduced IncHI1 plasmid stability, and may represent a new approach to combat antimicrobial resistance.
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subjects Amino acid sequence
Plasmidis
Plasmids
Seqüència d'aminoàcids
title The incC sequence is required for R27 plasmid stability
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