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Receptor affinity purification of a lipid-binding adhesin from Helicobacter pylori.

Department of Microbiology, Hospital for Sick Children, Toronto, Ontario, Canada.

ABSTRACT

Our previous work has shown that Helicobacter pylori specifically recognizes gangliotetraosylceramide, gangliotriaosylceramide, and phosphatidylethanolamine in vitro. This binding specificity is shared by exoenzyme S from Pseudomonas aeruginosa, and monoclonal antibodies against this adhesin prevent the attachment of H. pylori to its lipid receptors. We now report the use of a novel, versatile affinity matrix to purify a 63-kDa exoenzyme S-like adhesin from H. pylori which is responsible for the lipid-binding specificity of this organism.

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