Figure 3

Electrostatic surface potential of β-clamps from D. radiodurans (this work), E. coli ( PDB code 1POL), M. tuberculosis (PDB code 3P16) and T. maritima ( PDB code 1VPK). The dimer molecules are depicted with the C-terminal protein-interacting side facing up (dimer), and the monomers showing the inside of the half-ring and the dimer interfaces. The surface is coloured according to the electrostatic potential at 298 K (−8 to 8 kT/e) with negative potential in red and positive potential in blue.