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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Characterization of the antiseptic-resistance gene qacE delta 1 isolated from clinical and environmental isolates of Vibrio parahaemolyticus and Vibrio cholerae non-O1.

The nucleotide sequence and mechanism of action were examined on the antiseptic-resistance gene qacE delta 1 that had been isolated from Pseudomonas aeruginosa, Vibrio parahaemolyticus and Vibrio cholerae non-O1. The nucleotide sequences of qacE delta 1 genes isolated from environmental isolates of V. cholerae non-O1 and V. parahaemolyticus differed by one base from that of the gene from P. aeruginosa. Escherichia coli C600 that harbored qacE delta 1 genes from several strains of Vibrio spp. exhibited low-level resistance to intercalating dyes. The resistance of E. coli cells with these genes to intercalating dyes, such as ethidium bromide, was mediated by an efflux system. Moreover, the activity of QacE delta 1 was inhibited in the presence of calcium channel blockers but not of calmodulin inhibitors. These results indicate that the qacE delta 1 gene can be function in E. coli and that the gene mediates resistance in a similar manner to the antiseptic-resistance gene smr.[1]

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