Flagellar basal body |
C ring (FliM, FliN, FliY, FliG) |
Transfers proteins, regulates motor rotation and conversion, and coordinates protein secretion |
[9, 46, 82] |
MS ring (FliF) |
Involved in the synthesis of FlaA, FlaB, and FlgE |
[3] |
Type III secretion system (FlhA, FliO, FlhB, FliP, FliQ, FliR) |
Transports the majority of the flagellar proteins to the end of the flagellar structure |
[31, 38, 77] |
Motor (MotA, MotB) |
Fixes and rotates the flagellum |
[16, 59] |
Flagellar hook |
Flagellum export chaperone (FliS) |
Prevents premature polymerization of flagellin, and participates in flagellum assembly |
[3, 41] |
Flagellar hook protein (FlgE) |
Connects the basal body and the flagellar filament, and is closely related to the powerful driving force in a viscous environment |
[14, 61, 71] |
FlgK |
Controls the length of the flagellar hook during flagellum assembly |
[14] |
Flagellar filament |
FlaA, FlaB |
Plays an important role in bacterial motility |
[3, 32] |
FliD |
As a filament-capping protein in flagellar assembly |
[36, 37] |
Flagellar sheath |
HpaA, FaaA |
Protect against depolymerization of the flagellin subunits at low pH |
[10, 21, 68] |