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MexCD-OprJ multidrug efflux system of Pseudomonas aeruginosa: involvement in chlorhexidine resistance and induction by membrane-damaging agents dependent upon the AlgU stress response sigma factor.

Antimicrobial agents and chemotherapy (2008-10-08)
Sebastien Fraud, Aaron J Campigotto, Zhilin Chen, Keith Poole
ABSTRACT

The biocide chlorhexidine (CHX) as well as additional membrane-active agents were shown to induce expression of the mexCD-oprJ multidrug efflux operon, dependent upon the AlgU stress response sigma factor. Hyperexpression of this efflux system in nfxB mutants was also substantially AlgU dependent. CHX resistance correlated with efflux gene expression in various mutants, consistent with MexCD-OprJ being a determinant of CHX resistance.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Hexadecyltrimethylammonium bromide, ≥98%
Sigma-Aldrich
Hexadecyltrimethylammonium bromide, for molecular biology, ≥99%
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Hexadecyltrimethylammonium bromide, BioXtra, ≥99%
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Hexadecyltrimethylammonium bromide, BioUltra, for molecular biology, ≥99.0% (AT)
Sigma-Aldrich
Hexadecyltrimethylammonium bromide, ≥96.0% (AT)
Supelco
Hexadecyltrimethylammonium bromide, suitable for ion pair chromatography, LiChropur
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