A basic replicon of the naphthalene degradation plasmid pFME5 (80 kb, IncP-7) has been constructed and sequenced. The nucleotide sequence of pFME5mini is almost identical to replicons of the pND6-1 subgroup, which was separated based on the repA-oriV homology in our previous work. The basic replicon of pFME5 is capable of replication and stable maintenance exclusively in Pseudomonas species. An analysis of the deletion mutation indicated that, in contrast to the parWAB region, the parC gene is not essential for the stability of pFME5mini and this can be a common feature of IncP-7 replicons. We revealed that par-defective mutants of pFME5mini were slowly eliminated from the bacterial population in a nonselective medium compared to their pCAR1-based counterparts. Designed primers specific to the repA and parC genes can be used to detect IncP-7 plasmids, while primers specific to two variants of parA can be used for intragroup classification.
Russian Journal of Genetics – Springer Journals
Published: May 14, 2013
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