Table 1

Type IV pilin proteins in select model systems

ComponentPilin protein(s)References
Type IVa piliPseudomonas aeruginosaNeisseria spp.Vibrio cholerae (MSHAa)
    Major subunitPilAPilEMshA270, 282, 307
    Core minor subunitsFimU, PilV, PilW, PilXPilH, PilI, PilJ, PilKMshB, MshC, MshD, MshO1315, 270, 416
    Noncore minor subunitsPilEPilX (PilL), PilV, ComP175, 340, 415
    Prepilin peptidasePilDPilDVcpD146, 271, 298
Type IVb piliEPECb (bundle-forming pili)Vibrio cholerae (Tcpc)R64 thin pili
    Major subunitBfpATcpAPilS123, 135, 221
    Core minor subunitsBfpI, BfpJ, BfpKTcpBPilV221, 265, 368
    Prepilin peptidaseBfpPTcpJPilU221, 246, 368
Tad piliAggregatibacter actinomycetemcomitansCaulobacter crescentusPseudomonas aeruginosa
    Major subunitFlpPilAFlp117, 210, 359
    Core minor subunitsTadE, TadFNAdTadF42, 393
    Prepilin peptidaseTadVCpaAFppA117, 359, 392
Type II pseudopiliKlebsiella oxytocaVibrio choleraePseudomonas aeruginosa
    Major subunitPulGEpsGXcpT299, 331, 347
    Core minor subunitsPulH, PulI, PulJ, PulKEpsH, EpsI, EpsJ, EpsKXcpU, XcpV, XcpW, XcpX299, 331, 347
    Prepilin peptidasePulOVcpDXcpA37, 271, 321
  • a Mannose-sensitive hemagglutinin pili.

  • b Enteropathogenic E. coli.

  • c Toxin-coregulated pili.

  • d NA, not applicable.