Figure 2.

Intermolecular interactions between yedK and ssDNA. (A) Two structural elements are important for the conformation of the ssDNA strand. The Loop45 and β-thumb elements are shown in purple. (B) ssDNA strand conformation can be divided into three regions, as indicated by rectangles. Loop45 and β-thumb are shown in purple. The torsion angle between the C5 and G6 nucleotides is indicated by the black arrow. The catalytic Cys2 residue is shown with two conformers. (C, D) Detailed interactions between yedK and ssDNA. Residues and ssDNA are shown as green and white sticks, respectively. Water molecules are shown as yellow spheres.