Fig. 4
From: Binding of undamaged double stranded DNA to vaccinia virus uracil-DNA Glycosylase
Protein-DNA interactions at the extended DNA-binding site. a and b shown in left and right panel are hydrogen bonding interactions (identified by PISA analysis) involving D4 chains A and B, respectively. Relevant D4 residues are shown in stick models and are labeled. DNA chains are shown as lines. Hydrogen bonding distances shown are in a. Interaction of Lys131 side chain NZ atom with Asp162 carboxyl group may be important for local conformational stability. Electron density for this region of DNA complex is shown in Additional file 1: Figure S4