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- W2080421926 abstract "Enteropathogenic Escherichia coli (EPEC) and enterohaemorrhagic E. coli (EHEC), two closely related diarrhoeagenic pathogens, induce actin rearrangements at the surface of infected host cells resulting in the formation of pseudopod-like structures termed pedestals beneath intimately attached bacteria. We have shown previously that N-WASP, a key integrator of signalling pathways that regulate actin polymerization via the Arp2/3 complex, is essential for pedestal formation induced by EPEC using N-WASP-defective cell lines. Here we show that actin pedestal formation initiated by EHEC also depends on N-WASP. Amino acid residues 226-274 of N-WASP are both necessary and sufficient to target N-WASP to sites of EHEC attachment. The recruitment mechanism thus differs from that used by EPEC, in which amino-terminal sequences of N-WASP mediate recruitment. For EPEC, recruitment of N-WASP downstream of Nck has been postulated to be mediated by WIP. However, we find a direct interaction of N-WASP with WIP to be dispensable for EPEC-induced pedestal formation and present data supporting an F-actin-dependent localization of WIP to actin pedestals induced by both EPEC and EHEC. In summary, our data show that EPEC and EHEC use different mechanisms to recruit N-WASP, which is essential for actin pedestal formation induced by both pathogens." @default.
- W2080421926 created "2016-06-24" @default.
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- W2080421926 date "2004-03-01" @default.
- W2080421926 modified "2023-10-13" @default.
- W2080421926 title "Enterohaemorrhagic and enteropathogenic Escherichia coli use different mechanisms for actin pedestal formation that converge on N-WASP" @default.
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- W2080421926 doi "https://doi.org/10.1111/j.1462-5822.2004.00364.x" @default.
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