FilE is found almost exclusively in the genus Acinetobacter, and is assigned as a putative pilus system protein from local genomic contexts that include several additional putative pilus system proteins. Note that some members of this protein family have proline-rich repeat regions for which spurious translation in another reading frame can give a false-positive match to Pfam's collagen repeat region HMM, PF01391.
Jiyao W et al.(2023). "The conserved domain database in 2023.",