FIGURE 3.

StxB contains three Gb3 binding sites per monomer. (A) The overall monomer representation of the Gb3 binding sites in the StxB pentamer from Shigella dysenteriae/Escherichia coli (PDB id:1BOS); (B) Overview of the monomeric structure of StxB with three Gb3 binding sites; (C) The monomeric structure of StxB demonstrating the OB-fold; (D) Zoomed Gb3 binding sites of StxB. Galactose residues are yellow and glucose are in blue color. Hydrogen bonds are shown in yellow dash lines. The 3D representations were visualised using PyMol (https://pymol.org/2/).