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Appl. Environ. Microbiol. doi:10.1128/AEM.02294-07
Copyright (c) 2008, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

The ygaVP Genes of Escherichia coli Form a Tributyltin-inducible Operon

Université de Nantes, CNRS UMR 6144- GEPEA – ERT CBAC, Département Génie Biologique, 18 Bd Gaston Defferre, 85035 La Roche sur Yon, France; Université Paris-Sud 11, CNRS UMR 8621- Institut de Génétique et Microbiologie, Bâtiment 409, 91405 Orsay, France; Biolumine S.A, Site Universitaire de la Courtaisière, Département Génie biologique,18 bd Gaston Defferre, 85035 La Roche sur Yon, France

	Abstract

A tributyltin (TBT) luxAB transcriptional fusion in Escherichia coli revealed that a TBT-activated promoter is located upstream of two co-transcribed orphan genes, ygaV and ygaP. We demonstrate that transcription from the promoter upstream of ygaVP is constitutive in a ygaVP mutant, suggesting that YgaV is an autoregulated, TBT-inducible repressor.