type IVB pilus formation outer membrane protein, R64 PilN family
Several related protein families encode outer membrane pore proteins for type II secretion, type III secretion, and type IV pilus formation. This protein family appears to encode a secretin for pilus formation, although it is quite different from PilQ. Members include the PilN lipoprotein of the plasmid R64 thin pilus, a type IV pilus. Scoring between the trusted and noise cutoffs are examples of bundle-forming pilus B (bfpB). [Cell envelope, Surface structures, Protein fate, Protein and peptide secretion and trafficking]
Jiyao W et al.(2023). "The conserved domain database in 2023.",