Type	Tip	Usher	ATPase	Pilus Components/ Assembly	Peptidase	MISC	Motility	Homolgs	Organism
Type 4 pili		xcpQ	xcpR / xcpS	xcpT / xcpU / xcpV / xcpW / xcpX	xcpA	xcpY / xcpZ			Pseudomonas aeruginosa
Type 4 pili	pilA	pilQ	pilB / pilC	pilE / pilV / pilW / pilX / fimU	pilD		pilT / pilU	pilG / pilH / pilI / pilJ / pilK/ pilO / pilP	Pseudomonas aeruginosa
Type 4 pili	pilE	pilQ	pilF / pilG		pilD		pilT	pilO / pilP	Neisseria gonorrhoae
Bundle-forming pili	bfpA	bfpB	bfpD / bfpE	bfpI / bfpJ / bfpK	bfpP		bfpF	bfpC / bfpG / bfpH / bfpL / bfpU	Escherichia coli
Tcp (type 4) pili	tcpA	tcpC	tcpT / tcpE	tcpB	tcpJ				Vibrio cholerae
Type 4 pili	mshA	mshD	mshE / mshG	mshB / mshO					Vibrio cholerae