| Type I T4SSs |
| # | Name | Organism | Replicon | Location | Function |
| 1 | Tra_I | Burkholderia vietnamiensis G4 | plasmid pBVIE04 [NC_009228] | 11364..25435; 79169..97595 | NA |
| 2 | Tra_I | Candidatus Hamiltonella defensa 5AT (Acyrthosiphon pisum) | chromosome [NC_012751] | 951294..973321 | NA |
| 3 | Tra_I | Candidatus Hamiltonella defensa 5AT (Acyrthosiphon pisum) | plasmid pHD5AT [NC_012752] | 17231..44274 | conjugation |
| 4 | Tra_I | Citrobacter freundii plasmid pCTX-M3 (NC_004464) | plasmid pCTX-M3 [NC_004464] | 34020..53620; 84148..88516 | conjugation |
| 5 | Dot/Icm  | Coxiella burnetii CbuG_Q212 | chromosome [NC_011527] | 336565..370332 | effector translocation |
| 6 | Dot/Icm | Coxiella burnetii CbuK_Q154 | chromosome [NC_011528] | 1782702..1816475 | effector translocation |
| 7 | Dot/Icm | Coxiella burnetii Dugway 5J108-111 | chromosome [NC_009727] | 328950..361357 | effector translocation |
| 8 | Dot/Icm | Coxiella burnetii RSA 331 | chromosome [NC_010117] | 1646724..1684114 | effector translocation |
| 9 | Dot/Icm | Coxiella burnetii RSA 493 | chromosome [NC_002971] | 1559342..1591749 | effector translocation |
| 10 | Tra_I | Erwinia amylovora ATCC 49946 | plasmid 2 [NC_013973] | 42879..70361 | NA |
| 11 | Tra_I | Erwinia amylovora plasmid pEL60 (NC_005246) | plasmid pEL60 [NC_005246] | 31067..59193 | NA |
| 12 | Tra_I | Escherichia coli ED1a plasmid pECOED (NC_011754) | plasmid pECOED [NC_011754] | 63343..96053 | NA |
| 13 | Tra_I | Escherichia coli plasmid p3521 (NC_014843) | plasmid p3521 [NC_014843] | 26376..59455 | NA |
| 14 | Tra_I | Escherichia coli plasmid pCT (NC_014477) | plasmid pCT [NC_014477] | 35446..74913 | NA |
| 15 | Tra_I | Escherichia coli plasmid pEK204 (NC_013120) | plasmid pEK204 [NC_013120] | 39614..69611 | NA |
| 16 | Tra_I | Escherichia coli plasmid pO113 (NC_007365) | plasmid pO113 [NC_007365] | 19755..59660 | conjugation |
| 17 | Tra_I | Escherichia coli plasmid pO26-Vir (NC_012487) | plasmid pO26-Vir [NC_012487] | 114003..147110 | NA |
| 18 | Tra_I | Escherichia coli SE11 | plasmid pSE11-1 [NC_011419] | 51842..80231 | conjugation |
| 19 | Tra_I | Klebsiella pneumoniae plasmid pCTXM360 (NC_011641) | plasmid pCTXM360 [NC_011641] | 4300..37467 | NA |
| 20 | Dot/Icm | Legionella longbeachae NSW150 | chromosome [NC_013861] | 13014..13409; 402723..413318; 440995..441615; 1248304..1248705; 3252131..3270829; 3570476..3574182; 3625689..3626090 | effector translocation |
| 21 | Dot/Icm | Legionella pneumophila 2300/99 Alcoy | chromosome [NC_014125] | 526476..562636; 649247..649873; 3132162..3150833 | effector translocation |
| 22 | Dot/Icm | Legionella pneumophila str. Corby | chromosome [NC_009494] | 531033..567456; 657116..657742; 3197889..3216591 | effector translocation |
| 23 | Dot/Icm | Legionella pneumophila str. Lens | chromosome [NC_006369] | 526046..562439; 617992..618618; 2968136..2986785 | effector translocation |
| 24 | Dot/Icm | Legionella pneumophila str. Paris | chromosome [NC_006368] | 550004..586375; 634498..635124; 3108400..3127151 | effector translocation |
| 25 | Dot/Icm | Legionella pneumophila subsp. pneumophila str. Philadelphia 1 | chromosome [NC_002942] | 479014..515432; 566512..567138; 3021320..3039999 | effector translocation |
| 26 | Tra_I | Plasmid ColIb-P9 | plasmid ColIb-P9 [NC_002122] | 42807..71646 | Conjugation |
| 27 | Tra_I | Pseudomonas putida plasmid pGRT1 (NC_015855) | plasmid pGRT1 [NC_015855] | 6387..14333; 52468..65353; 121398..127061 | NA |
| 28 | Tra_I | Pseudomonas syringae pv. tomato str. DC3000 | plasmid pDC3000B [NC_004632] | 38589..66906 | NA |
| 29 | Tra_I | Pseudomonas syringae pv. tomato str. DC3000 | plasmid pDC3000A [NC_004633] | 43283..71657 | NA |
| 30 | Tra_I | Salmonella enterica subsp. enterica serovar Choleraesuis str. SC-B67 | plasmid pSC138 [NC_006856] | 52737..78002 | NA |
| 31 | Tra_I | Salmonella enterica subsp. enterica serovar Heidelberg str. SL476 | plasmid pSL476_91 [NC_011081] | 42120..70694 | NA |
| 32 | Tra_I | Salmonella enterica subsp. enterica serovar Kentucky str. CVM29188 plasmid pCVM29188_101 (NC_011077) | plasmid pCVM29188_101 [NC_011077] | 46904..77702 | NA |
| 33 | Tra_I | Salmonella enterica subsp. enterica serovar Typhimurium plasmid R621a (NC_015965) | plasmid R621a [NC_015965] | 40508..71773 | NA |
| 34 | Tra_I | Salmonella enterica subsp. enterica serovar Typhimurium plasmid R64 (NC_005014) | plasmid R64 [NC_005014] | 70127..98701 | conjugation |
| 35 | Tra_I | Serratia entomophila plasmid pADAP (NC_002523) | plasmid pADAP [NC_002523] | 1..8192; 136997..153404 | NA |
| 36 | Dot/Icm | Xanthomonas campestris pv. vesicatoria str. 85-10 | plasmid pXCV183 [NC_007507] | 6587..9318; 32545..35692; 45982..50471; 169614..179867 | NA |
| 37 | Tra_I | Yersinia pseudotuberculosis plasmid pGDT4 (NC_011759) | plasmid pGDT4 [NC_011759] | 3657..22587; 91198..93901 | conjugation |
| T4SS derived from experimental literature | |||||