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- W2155555199 abstract "Vibrio cholerae of both biotypes produce a soluble Zn 2+ -dependent metalloprotease: haemagglutinin/protease (Hap), encoded by hapA . Hap has been shown to have mucinolytic and cytotoxic activity. These activities are likely to play an important role in the pathogenesis of cholera and the reactogenicity of attenuated vaccine strains. Production of Hap requires transcriptional activation by the HapR regulator and is repressed by glucose. The present study shows that mucin purified from two sources, bile salts, and growth at 37 °C enhanced Hap protease production. Analysis of hapA and hapR promoter fusions with the lacZ gene showed both promoters to be activated in a cell-density-dependent pattern. Glucose repressed and mucin induced the hapA promoter by a HapR-independent mechanism. Bile had no effect on either hapR or hapA promoter activity. Expression of hapA was required for vibrios to translocate through a mucin-containing gel. These results suggest Hap to play an important role in cholera pathogenesis by promoting mucin gel penetration, detachment and spreading of infection along the gastrointestinal tract." @default.
- W2155555199 created "2016-06-24" @default.
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- W2155555199 date "2003-07-01" @default.
- W2155555199 modified "2023-09-30" @default.
- W2155555199 title "Haemagglutinin/protease expression and mucin gel penetration in El Tor biotype Vibrio cholerae" @default.
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- W2155555199 doi "https://doi.org/10.1099/mic.0.26086-0" @default.
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