Multifunctional protein which promotes bacterial attachment to fibrinogen, elastin and fibronectin (PubMed:15234962, PubMed:21569203, PubMed:27387503). Promotes also the accumulation phase and the primary attachment phase of biofilm formation (PubMed:24628034). In addition, protects against the antimicrobial activity of histones. Mechanistically, captures histones and prevents them from reaching the bacterial membrane and simultaneously binds plasminogen, thereby promoting its conversion to plasmin to destroy the bound histones (PubMed:30622139, PubMed:27387503). Interacts with host PLG; this interaction provides active plasmin on the surface of bacteria cells (PubMed:27387503). Interacts with host histones (PubMed:30622139). The fibrinogen- and elastin-binding sites have been localized to the N-terminal region.