. 2019 Mar 1;7(2):10.1128/microbiolspec.psib-0006-2018. doi: 10.1128/microbiolspec.psib-0006-2018

TABLE 1.

List of available T4aP structures^a

Pseudomonas equivalent	Name	Species	PDB (EMDB) code(s)	Reference(s)
The pilus fiber
PilY1	PilY1	Pseudomonas aeruginosa PAO1	3HX6	51
PilV	Tt1218	Thermus thermophilus	5G25	16
PilW	Tt1219	Thermus thermophilus	5G23, 5G24	16
FimU	FimU	Pseudomonas aeruginosa PAO1	4IPU, 4IPV	39
PilE	PilE	Pseudomonas aeruginosa PAO1	4NOA	40
	PilX	Neisseria meningitidis	2OPD, 2OPE	45
	PilV	Neisseria meningitidis	5V23,^b 5V0M^b	None
PilA	PilA	Acinetobacter baumannii	4XA2, 5VAW,^b 5IHJ, 5CFV	8
	PilA	Geobacter sulfurreducens	2M7G	19
	PilA	Pseudomonas aeruginosa PAK	1DZO, 1OQW, 1X6P/Q/R/X/Y/Z	6, 12, 17
	PilA	Pseudomonas aeruginosa K122-4	1HPW, 1QVE, 1RG0	14, 21
	PilA	Pseudomonas aeruginosa Pa110594	JYZ, 3JZZ	5
	PilA	Pseudomonas aeruginosa consensus	2PY0	11
	PilA1	Clostridium difficile	4TSM, 4OGM, 4PE2	9
	FimA	Dichelobacter nodosus	3SOK	10
	PilBac1	Shewanella oneidensis	4D40, 4US7	15
	PilE	Francisella tularensis	3SOJ	10
	PilE	Neisseria gonorrhoeae	1AY2, 2HI2, 2PIL	7, 13, 18
	PilE	Neisseria meningitidis	5JW8, 4V1J^b	29
	Tt1221	Thermus thermophilus HB8	4BHR	94
PilA fiber	PilA	Pseudomonas aeruginosa PAK	5VXY (8740)	30
	PilA4	Thermus thermophilus	None (3024)	119
	PilE	Neisseria gonorrhoeae	5VXX (8739)	30
	PilE	Neisseria gonorrhoeae	2HIL (1236)	7
	PilE	Neisseria meningitidis	5KUA (8287)	29
None known	ComP	Neisseria meningitidis	2M3K, 5HZ7	38, 48
	ComP	Neisseri subflava	2NBA	38
	PilJ	Clostridium difficile	4IXJ	37
	Tt1222	Thermus thermophilus HB8	5G2F	16
The motor
PilB	PilB	Geobacter metallireducens	5TSG, 5TSH	60
	PilF	Thermus thermophilus	5IT5, 6EJF (3882), 6F8L (4194), (2222), (2223)	59, 62, 130
	PilB	Geobacter sulfurreducens	5ZFR	61
PilB (N1D)	MshE	Vibrio cholerae serotype O1	5HTL	69
PilT	PilT	Pseudomonas aeruginosa PAO1	3JVU, 3JVV	88
	PilT	Aquifex aeolicus strain VF5	2EWV, 2EWW, 2EYU, 2GSZ	89
	PilT4	Geobacter sulfurreducens	5ZFQ	61
	PilT2	Thermus thermophilus	5FL3^b	None
PilC	PilC	Thermus thermophilus	2WHN	54
FimX	FimX	Pseudomonas aeruginosa PAO1	4AG0, 3HV9, 3HVA, 3HV8, 4AFY, 4J40	135, 136
	FimX	Xanthomonas sp.	4FOK, 4F3H	76, 137
PilZ	PilZ	Xanthomonas sp.	3CNR, 3DSG	75, 138
FimX and PilZ	FimX and PilZ	Xanthomonas sp.	4FOU, 4F48	76, 137
The alignment complex
PilM	PilM	Pseudomonas aeruginosa PAO1	5EOX, 5EOY, 5EQ6	55
PilM and PilN^cyto	PilM and PilN^cyto	Pseudomonas aeruginosa PAO1	5EOU	55
	PilM and PilN^cyto	Thermus thermophilus	2YCH	92
PilN	PilN	Thermus thermophilus	4BHQ	94
PilO	PilO	Pseudomonas aeruginosa PAO1	2RJZ, 5UVR	95, 96
PilMN, PilMNO, and PilMNOA	PilMN, PilMNO, and PilMNOA	Thermus thermophilus	None^c (4157, 4157, 4159)	94
PilP	PilP	Pseudomonas aeruginosa PAO1	2LC4, 2Y4X,^b 2Y4Y^b	100
	PilP	Neisseria meningitidis	2IVW	99
The outer membrane pore
PilQ	PilQ	Pseudomonas aeruginosa PAO1	None (8297)	114
	PilQ	Thermus thermophilus	None^c (3985, 3995, 3996, 3997, 3998)	113
	PilQ	Candidatus pelagibacter	None (8330)	117
PilQ and PilP	PilQ and PilP	Neisseria meningitidis	4AV2 (2105)	101
PilQ (N0 and linker from N0 to N1)	PilQ (N0 and linker from N0 to N1)	Neisseria meningitidis	4AR0	101
PilQ (AMIN)	PilQ (β2)	Neisseria meningitidis	4AQZ	101
PilF	PilF	Pseudomonas aeruginosa PAO1	2HO1, 2FI7	134, 139
PilF	PilW	Neisseria meningitidis	2VQ2	126
FimV	FimV	Pseudomonas aeruginosa PAO1	4MBQ, 4MAL	140
In situ structures of the T4aP		Myxococcus xanthus	3JC8, 3JC9 (3247–3264)	43
		Thermus thermophilus	None (8224, 3021–3024)	118, 119

^{^a}

These are the published T4aP structures, not those from related T2SS, T4bP, Com pilus, Tad/Flp pilus, or archaellum.

^{^b}

Peer-reviewed article describing the structure has not been published yet.

^{^c}

A model could be built into the density, but the model was not published to the Protein Data Bank.