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Microbiology. 2008 Jun;154(Pt 6):1802-12. doi: 10.1099/mic.0.2007/010918-0.

The Yersinia pestis autotransporter YapC mediates host cell binding, autoaggregation and biofilm formation.

Author information

1
Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078, USA.

Abstract

YapC, a putative Yersinia pestis autotransporter protein, shows strong homology to the enterotoxigenic Escherichia coli adhesin TibA. As a potentially important surface protein of Y. pestis, we analysed YapC for several activities. When expressed in the non-pathogenic Fim(-) E. coli strain AAEC185, YapC mediated attachment to both murine-derived macrophage-like cells (RAW264.7) and human-derived epithelial-like cells (HEp-2). In addition, expression of YapC on the surface of E. coli led to autoaggregation in DMEM tissue culture medium, a phenomenon associated with virulence in Yersinia species. YapC also mediated formation of biofilm-like deposits by E. coli AAEC185. Deletion of yapC in Y. pestis strain KIM5 resulted in no change in adhesion to either RAW264.7 or HEp-2 cells, or in biofilm formation. Lack of a phenotype for the Y. pestis DeltayapC mutant may reflect the relatively low level of yapC expression in vitro, as assessed by RT-PCR, and/or redundant functions expressed in vitro. These data demonstrate several activities for YapC that may function during Y. pestis infection.

PMID:
18524935
DOI:
10.1099/mic.0.2007/010918-0
[Indexed for MEDLINE]

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