Figure 2.

Crystal structure of the PE5_mt–PPE4_mt–EspG_3mm heterotrimer and selected interactions in PPE4_mt-EspG_3mm interface. A, crystal structure of the PE5_mt–PPE4_mt–EspG_3mm heterotrimer in a cartoon representation with two views related by a rotation of 180°. EspG₃ interacts exclusively with the tip PPE4, distal to PE5. B–F, interacting residues are shown with main chain and side chain in stick form with electron density map (2F_o − F_c shown at 1.0 σ) covering side chains and hydrogen bonding in gray dashed lines.