Fimbrial protein pilin (IPR001082)

Short name: Pilin

Overlapping homologous superfamilies


Family relationships



Pilin is a subunit of the pilus, a polar flexible filament, which consists of a single polypeptide chain arranged in a helical configuration of five subunits per turn. Gram-negative bacteria produce pilin which is characterised by the presence of a very short leader peptide of 6 to 7 residues, followed by a methylated N-terminal phenylalanine residue and by a highly conserved sequence of about 24 hydrophobic residues, of the NMePhe type pilin [PMID: 2898203, PMID: 3118043].

GO terms

Biological Process

GO:0007155 cell adhesion

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0009289 pilus

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.