The Non-Flagellar Type III Secretion System Evolved from the Bacterial Flagellum and Diversified into Host-Cell Adapted Systems
Each T3SS core protein was scored using the protein profiles for flagella (Y axis) and for NF-T3SSs (X axis). One sees a clear separation around the main diagonal. The color indicates the system (blue for flagellar proteins, red for NF-T3SS proteins). A circle indicates a correct prediction, and a triangle a wrong prediction. The analysis is described in Materials and Methods, and the learning dataset is shown in Figure S1.