Open AccessIdentification of Bordetella pertussis virulence‐associated outer membrane proteins
Author(s) -
Passerini de Rossi Beatriz N.,
Friedman Laura E.,
González Flecha F.Luis,
Castello Pablo R.,
Franco Mirta A.,
Rossi Juan Pablo F.C
Publication year - 1999
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1999.tb13442.x
Subject(s) - bacterial outer membrane , virulence , bordetella pertussis , virulence factor , biology , microbiology and biotechnology , membrane protein , peptide sequence , bordetella , bacteria , biochemistry , membrane , gene , escherichia coli , genetics
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.