Controls colony form variation and autoaggregation. May function as an adhesin. Interaction with TamA of the translocation and assembly module (TAM) initiates insertion in the outer membrane (PubMed:25341963). The cell surface component is about 60 kDa and can be released by mild heat treatment (PubMed:22466966). May form a beta-barrel. The signal peptide, cleaved at the inner membrane, guides the autotransporter protein to the periplasmic space. The C-terminal beta chain translocator domain inserts in the outer membrane via TamA (PubMed:25341963). This domain probably forms a hydrophilic pore for the translocation of the passenger domain to the bacterial cell surface, with subsequent cleavage. Finally, the mature protein remains tightly associated with the bacterium (Probable).