Binds to hyaluronic acid and epithelial cells, and is required for full virulence in the mouse model. Homotrimer. The C-terminal translocator domain is localized in the outer membrane and the passenger domain is at the cell surface (By similarity). Localizes at the new cell pole generated after cell division (PubMed:23319562). The signal peptide, cleaved at the inner membrane, guides the autotransporter protein to the periplasmic space. Then, insertion of the C-terminal translocator domain in the outer membrane forms a hydrophilic pore for the translocation of the passenger domain to the bacterial cell surface. Deletion mutant exhibits a reduction in the adhesion to HeLa and A549 epithelial cells compared with the wild-type strain. Shows an attenuated phenotype in the mouse model. Belongs to the autotransporter-2 (AT-2) (TC 1.B.40) family.