Building a secreting nanomachine: a structural overview of the T3SS

- Flagellar and non-flagellar T3SS are built assembling homologous protein machineries.
- Unified nomenclature for non-flagellar T3SS.
- New model of the T3SS needle is consistent with the flagellar filament, both in terms of helical parameters and orientation.
- Structural and functional implication of the new architecture of the T3SS export apparatus and ATPase complex.