Identification of Bordetella pertussis regulatory sequences required for transcriptional activation of the fhaB gene and autoregulation of the bvgAS operon.
Transcription of numerous virulence genes in Bordetella pertussis is positively regulated by the products of the bvgAS genes. In this study a series of lacZYA fusions containing deletions in either the fhaB or bvgA promoter regions was used to identify cis-acting regulatory regions required for bvg activation of these two genes. Gel retardation and DNase I protection analyses have shown that specific protein-DNA interactions occur at these regulatory regions and that these interactions require the transcriptional activator protein BvgA. The regulatory regions found upstream of fhaB and bvgA which are involved in protein binding both contain the sequence TTTCCTA. This sequence is part of an inverted repeat upstream of fhaB and a direct repeat upstream of bvgA. Homologous repeats are not apparent upstream of other bvg-activated genes, such as ptx and cyaA. These data suggest that the mechanism for transcriptional regulation of the other bvg-activated genes is complex and may require regulatory factors in addition to the bvgAS gene products.[1]References
- Identification of Bordetella pertussis regulatory sequences required for transcriptional activation of the fhaB gene and autoregulation of the bvgAS operon. Roy, C.R., Falkow, S. J. Bacteriol. (1991) [Pubmed]
Annotations and hyperlinks in this abstract are from individual authors of WikiGenes or automatically generated by the WikiGenes Data Mining Engine. The abstract is from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.About WikiGenesOpen Access LicencePrivacy PolicyTerms of Useapsburg
