Identification of Bordetella pertussis virulence-associated outer membrane proteins |
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Authors: | Passerini de Rossi B N Friedman L E González Flecha F L Castello P R Franco M A Rossi J P |
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Affiliation: | Cátedra de Microbiologı́a, Departamento de Quı́mica Biológica-IQUIFIB, Universidad de Buenos Aires, Junı́n 956, Buenos Aires 1113, Argentina;Facultad de Farmacia y Bioquı́mica, Universidad de Buenos Aires, Junı́n 956, Buenos Aires 1113, Argentina |
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Abstract: | Bordetella pertussis virulence-associated 30-, 32-, 90- and 95-kDa outer membrane proteins were purified and their N-terminal amino acid sequences were determined. The 30- and 32-kDa outer membrane proteins showed identity to the C-terminal region of the precursors of the serum resistance protein (BrkA) and the tracheal colonization factor, respectively. We confirmed the cleavage site of these precursors after N731 for BrkA and after N393 for tracheal colonization factor. Associated with the 32-kDa outer membrane protein, we found a new group of 36-kDa virulence-associated peptides. The 95-kDa outer membrane protein showed identity to Vag8. The 90-kDa outer membrane protein did not show homology with the described proteins. We report the N-termini sequence of Vir-90, a novel potential virulence factor. |
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Keywords: | Bordetella pertussis Virulence associated-outer membrane protein BrkA precursor Tracheal colonization factor precursor Vag8 Vir-90 |
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