This family includes members such as BslA (previously called YuaB). Secreted BslA from Bacillus subtillis has been shown to form surface layers around the biofilm self-assembling at interfaces of B. subtilis biofilms, forming an elastic film. structural analysis revealed that BslA consists of an Ig-type fold with the addition of an unusual, extremely hydrophobic cap region. The hydrophobic cap exhibits physiochemical properties similar to the hydrophobic surface found in fungal hydrophobins; thus, BslA is defined as member of a class of bacterially produced hydrophobins [1].

1: BslA is a self-assembling bacterial hydrophobin that coats the Bacillus subtilis\tbiofilm. Hobley L, Ostrowski A, Rao FV, Bromley KM, Porter M, Prescott AR, MacPhee CE, van Aalten DM, Stanley-Wall NR; Proc Natl Acad Sci U S A. 2013;110:13600-13605. PMID:23904481