Figure 3. Other α-pore-forming toxins that use asymmetric dimers as building blocks.

a) Crystal structure of A. hydrophila AhlB in a pore-like assembly (PDB: 6GRK). b) Crystal structure of S. marcescens SmhA (PDB: 7A27) in a pore-like assembly. c) Cryo-EM structure of Y. enterocolitica YaxAB in a pore-like assembly (PDB: 6EL1). d) Cryo-EM structure of X. nematophila XaxAB in a pore-like assembly (PDB: 6GY6). In each panel, the MakA asymmetric dimer (chain A: green; chain B: cyan) is superimposed onto the corresponding structure.