Identification of Operators and Promoters That Control SXT Conjugative Transfer

Overview

Journal J Bacteriol

Publisher American Society for Microbiology

Specialty Microbiology

Date 2004 Aug 20

PMID 15317801

Citations 27

Authors

John W Beaber

Matthew K Waldor

Affiliations

Soon will be listed here.

Abstract

Transfer of SXT, a Vibrio cholerae-derived integrating conjugative element that encodes multiple antibiotic resistance genes, is repressed by SetR, a lambda434 cI-related repressor. Here we identify divergent promoters between s086 and setR that drive expression of the regulators of SXT transfer. One transcript encodes the activators of transfer, setC and setD. The second transcript codes for SetR and, like the cI transcript of lambda, is leaderless. SetR binds to four operators located between setR and s086; the locations and relative affinities of these sites suggest a model for regulation of SXT transfer.

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