Table 1.
Nomenclature of type III secretion components in different bacteria
| Yersinia spp. | Shigella spp | Salmonella enterica | Pseudomonas syringae | Sct common nomenclature1 | Flagellar apparatus | Proposed Function | |
|---|---|---|---|---|---|---|---|
| SPI-1 | SPI-2 | ||||||
| YscC | MxiD | InvG | SsaC | HrcC | SctC | - | Needle complex outer rings |
| YscD | MxiG | PrgH | SsaD | HrpQ | SctD | - | Needle complex inner rings |
| YscJ | MxiJ | PrgK | SsaJ | HrcJ | SctJ | - | Needle complex inner rings |
| YscR | Spa24 | SpaP | SsaR | HrcR | SctR | FliP | Export apparatus (protein channel?) |
| YscS | Spa9 | SpaQ | SsaS | HrcS | SctS | FliQ | Export apparatus (protein channel?) |
| YscT | Spa29 | SpaR | SsaT | HrcT | SctT | FliR | Export apparatus (protein channel?) |
| YscU | Spa40 | SpaS | SsaU | HrcU | SctU | FlhB | Export apparatus; substrate switching |
| YscV | MxiA | InvA | SsaV | HrcV | SctV | FlhA | Export apparatus; (proton channel?) |
| YscK | MxiK | OrgA | - | HrpD | SctK | - | Cytoplasmic sorting platform |
| YscQ | Spa33 | SpaO | SsaQ | HrcQA+B | SctQ | FliM + FliN | Cytoplasmic sorting platform |
| YscL | MxiN | OrgB | SsaK | HrpE | SctL | FliH | Links ATPase to sorting platform (?) |
| YscN | Spa47 | InvC | SsaN | HrcN | SctN | FliI | ATPase |
| YscO | Spa13 | InvI | SsaO | HrpO | SctO | - | Cytoplasmic component; function unknown |
| YscF | MxiH | PrgI | SsaG | HrpA | SctF | - | Needle filament component |
| YscI | MxiI | PrgJ | SsaI | HrpB | SctI | - | Inner rod component |
| YscP | Spa32 | InvJ | SsaP | HrpP | SctP | FliK | Inner rod assembly; substrate switching |
| LcrV | IpaD | SipD | - | - | - | Tip complex; translocase deployment | |
| YopB | IpaB | SipB | SseC | HrpK | - | Effector translocase | |
| YopD | IpaC | SipC | SseD | - | - | Effector translocase | |
| YscW | MxiM | InvH | - | - | - | Pilotin (assembly of outer rings) | |
| YopN | MxiC | InvE | SsaL | HrpJ | SctW | - | Controls translocase secretion |
1
Previously proposed common nomenclature (71).