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J Mol Microbiol Biotechnol. 2001 Apr;3(2):179-84.

Enterococcus faecalis multi-drug resistance transporters: application for antibiotic discovery.

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Phytera, Inc, Worcester, MA 01605, USA.


Using bioinformatics approaches, 34 potential multidrug resistance (MDR) transporter sequences representing 4 different transporter families were identified in the unannotated Enterococcus faecalis database (TIGR). A functional genomics campaign generating single-gene insertional disruptions revealed several genes whose absence confers significant hypersensitivities to known antimicrobials. We constructed specific strains, disrupted in a variety of previously unpublished, putative MDR transporter genes, as tools to improve the success of whole-cell antimicrobial screening and discovery. Each of the potential transporters was inactivated at the gene level and then phenotypically characterized, both with single disruption mutants and with 2-gene mutants built upon a delta norA deleted strain background.

[Indexed for MEDLINE]

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