Type IV pilus biogenesis factor PilY1

UniProtKB accession:  Q9HVM8

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Involved in pilus assembly, twitching motility and adhesion to host cells. Primes type IV pili (T4P) assembly and is required for inclusion of minor pilins PilV, PilW and PilX to the surface pili (PubMed:25389296). Stabilizes assembled pilus fibers likely by antagonizing retraction mediated by PilT. Calcium-binding and calcium release by PilY1 seem to be essential for twitching motility and for regulation of pilus retraction dynamics of PilT (By similarity).