Characterization of the fim2 and fim3 fimbrial subunit genes of Bordetella bronchiseptica: roles of Fim2 and Fim3 fimbriae and flagella in adhesion.

Infection and Immunity
P H SavelkoulW Gaastra

Abstract

With DNA probes derived from the fimbrial subunit genes fim2 and fim3 of Bordetella pertussis, two homologous subunit genes of Bordetella bronchiseptica were identified and cloned. The nucleotide sequences of these genes were determined. Comparison of these nucleotide sequences with the B. pertussis fimbrial fim2 and fim3 subunit genes showed a pronounced homology. Therefore, the B. bronchiseptica genes were also designated fim2 and fim3. Expression of the two B. bronchiseptica genes was demonstrated by Western blotting (immunoblotting) with polyclonal antiserum directed against the Fim2 and Fim3 fimbrial subunit proteins of B. pertussis and by enzyme-linked immunosorbent assay with monoclonal antibodies. After growth of B. bronchiseptica in the presence of MgSO4, no expression of both fimbrial subunit genes was observed. While no fimbriae were expressed, expression of flagella was observed under these circumstances. A longer C-stretch (up to 19 cytosine residues) than the one in front of the fim2 and fim3 genes of B. pertussis is present in front of the B. bronchiseptica fimbrial genes. In adherence experiments, fimbriated (Bvg+) as well as flagellated (Bvg-) B. bronchiseptica bacteria were able to adhere to HeLa cells, wherea...Continue Reading

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Citations

May 23, 2003·Infection and Immunity·Bryna FuchslocherPeggy A Cotter
Dec 13, 2005·Proceedings of the National Academy of Sciences of the United States of America·Carol S InatsukaPeggy A Cotter
Dec 23, 2016·Cellular Microbiology·Claudia M FreitagJos P M van Putten
May 16, 2019·MBio·Casandra L HoffmanErik L Hewlett
Dec 24, 1997·Journal of Bacteriology·J S BoschwitzD A Relman

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