Anti-InlA single-domain antibodies that inhibit the cell invasion of Listeria monocytogenes.

ABSTRACT: Listeriosis, caused by infection with Listeria monocytogenes, is a severe disease with a high mortality rate. The L. monocytogenes virulence factor, internalin family protein InlA, which binds to the host receptor E-cadherin, is necessary to invade host cells. Here, we isolated two single-domain antibodies (V_HHs) that bind to InlA with picomolar affinities from an alpaca immune library using the phage display method. These InlA-specific V_HHs inhibited the binding of InlA to the extracellular domains of E-cadherin in vitro as shown by biophysical interaction analysis. Furthermore, we determined that the V_HHs inhibited the invasion of L. monocytogenes into host cells in culture. High-resolution X-ray structure analyses of the complexes of V_HHs with

SUBMITTER: Yamazaki T 

PROVIDER: S-EPMC10582769 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature