Description | The type III secretion system of Gram-negative bacteria is used to transport virulence factors from the pathogen directly into the host cell [ ] and is only triggered when the bacterium comes into close contact with the host. Effector proteins secreted by the type III system do not possess a secretion signal, and are considered unique because of this. Yersinia spp. secrete an effector protein called YopE through the type III needle []. This acts as a Rho GTPase-activating protein that disrupts the host cell actin cytoskeleton, and is regulated by a chaperone protein called SycE/YerA []. In the absence of the SycE chaperone, YopE is not transported through the needle and remains in the bacterial cytoplasm, so suggesting a crucial role for this moiety []. | Name | Type III secretion chaperone SycE |
Short Name | T3SS_chp_SycE | Type | Family |