Protein
Type IV pilus biogenesis factor PilY1
Organism
Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)
Function
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).
Similarity
Belongs to the PilY1 family.
Sequence
MKSVLHQIGKTSLAAALSGAVLLSAQTTHAAALSVSQQPLMLIQGVAPNMLVTLDDSGSMAFAYAPDSISGYGNYTFFASNSFNPMYFDPNTQYKLPKKLTLVNGQVQIQDYPAPNFSSAWRNGFTRSGSINLSNSYKVTIEYGRGYDKESTIKADAAYYYDFTGSSSCNRTNQACYTRRYVSTEQRQNFANWYSFYRTRALATQTAANLAFYSLPENARVSWQLLNDSNCNQMGSGSSSGNCFSNYLRDFTGQHRVNFFNWLEKLSVNGGTPLRQAMTRAGEFLKKTGVNGPYAYRPGTQTAPEYSCRGSYHILMTDGLWNNDSANVGNADSTARNLPDGKSYSSQTPYRDGTFDTLADQAFHYWATDARPDIDDNIKPYIPYPDQANPSAEYWNPRNDPATWQHMVTYTLGLGLTTSLTSPRWEGSTFSGGYNDIVAGNLSWPRASNNDSNNVYDLWHAAVNSRGEFFSADSPDQLVAAFQDILNRISGKDLPASRPAISSSLQEDDTGDKLTRFAYQTSFASDKNWAGDLTRYSLTTQDKATVQTKLWSAQSILDAMPNGGAGRKIMMAGSGTSGLKEFTWGSLSADQQRQLNRDPDRNDVADTKGQDRVAFLRGDRRKENSDNFRTRNSILGDIINSSPATVGKAQYLTYLAQPIEPSGNYSTFAEAQKTRAPRVYVGANDGMLHGFDTDGNETFAFIPSAVFEKLHKLTARGYQGGAHQFYVDGSPVVADAFFGGAWHTVLIGSLRAGGKGLFALDVTDPANIKLLWEIGVDQEPDLGYSFPKPTVARLHNGKWAVVTGNGYSSLNDKAALLIIDLETGAITRKLEVTGRTGVPNGLSSPRLADNNSDGVADYAYAGDLQGNLWRFDLIAGKVNQDDPFSRANDGPAVASSFRVSFGGQPLYSAVDSAGAAQAITAAPSLVRHPTRKGYIVIFGTGKYFENADARADTSRAQTLYGIWDQQTKGEAAGSTPRLTRGNLQQQTLDLQADSTFASTARTIRIASQNPVNWLNNDGSTKQSGWYLDFMVNGTLKGEMLIEDMIAIGQVVLLQTITPNDDPCADGASNWTYGLDPYTGGRTSFTVFDLARQGVVDSKSDYSYNKQNVAVSGTEQKGLGGLTLSTNEQGNPEVCSSGECLTVNPGPNTRGRQNWRPIEGKN