The Yop virulon allows Yersinia spp. to resist the immune response of the h
ost: by injecting harmful proteins into host cells. It is composed of four
elements: (i) type III secretion machinery called Ysc; (ii) a set of protei
ns required to translocate the effector proteins inside the eukaryotic cell
s; (iii) a control system, and (iv) six Yop effector proteins. (C) 2000 Edi
tions scientifiques et medicales Elsevier SAS.