Adhesin E plays a role in pathogenesis [1]. It binds to host proteins including plasminogen, vitronectin and laminin [2]. The domain consists of a 6-stranded antiparallel beta sheet with an alpha helix at the C terminus tethered to the concave side of the sheet by a disulfide bridge [1].

1: Nontypeable Haemophilus influenzae adhesin protein E: characterization and biological activity. Ronander E, Brant M, Eriksson E, Morgelin M, Hallgren O, Westergren-Thorsson G, Forsgren A, Riesbeck K; J Infect Dis. 2009;199:522-531. PMID:19125675

2: The unique structure of Haemophilus influenzae protein E reveals multiple binding sites for host factors. Singh B, Al-Jubair T, Morgelin M, Thunnissen MM, Riesbeck K; Infect Immun. 2013;81:801-814. PMID:23275089