The Listeria monocytogenes prfAP2 promoter is regulated by sigma B in a growth phase dependent manner
Journal Title: | FEMS microbiology letters 2005, Vol.245 (2), p.329-336 |
Main Author: | Schwab, Ute |
Other Authors: | Bowen, Barbara , Nadon, Celine , Wiedmann, Martin , Boor, Kathryn J |
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English |
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Quelle: | Alma/SFX Local Collection |
Publisher: | Oxford, UK: Elsevier B.V |
ID: | ISSN: 0378-1097 |
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recordid: | cdi_proquest_miscellaneous_67754522 |
title: | The Listeria monocytogenes prfAP2 promoter is regulated by sigma B in a growth phase dependent manner |
format: | Article |
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ispartof: | FEMS microbiology letters, 2005, Vol.245 (2), p.329-336 |
description: | Listeria monocytogenes prfA, encoding positive regulatory factor A, is transcribed from three promoters ( prfAP1, prfAP2, and P plcA). The prfAP2 promoter was previously proposed to be sigma B (σ B)-dependent. This hypothesis was tested by creating prfA promoter- gus transcriptional fusions in both L. monocytogenes wild-type (wt) and Δ sigB backgrounds and then measuring (i) β-glucuronidase (GUS) activities; (ii) gus mRNA transcript levels; and (iii) the presence or absence of GUS in cells by immunofluorescence staining. prfAP2-directed expression increased as the wt L. monocytogenes strain entered stationary phase, whereas prfAP2-directed expression was greatly reduced in the Δ sigB strain, confirming both growth phase- and σ B-dependent transcription of prfAP2. We conclude that prfAP2 is directly regulated by σ B. |
language: | eng |
source: | Alma/SFX Local Collection |
identifier: | ISSN: 0378-1097 |
fulltext: | fulltext |
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