Promotes invasion of host epithelial cells by adhering to receptors on the host cell surface to facilitate endocytosis of the pathogen into host cells (PubMed:32487760). Probably binds integrin ITGA3:ITGB1 via ITGB1, on the cell surface of host alveolar epithelial cells (PubMed:32487760). Interacts with host integrin beta-1 ITGB1 on the cell surface of host alveolar epithelial cells. RNAi-mediated knockdown decreases invasion of human alveolar epithelial cells.