Figure 3 - full size

 

Figure 3.
Figure 3: Recognition of loop E by finger 4. a, Structure of loop E. The chains are coloured as in Fig. 2a. Hydrogen bonds are shown in red, and base stacking in green. Stacking interactions are assigned according to the degree of overlap and have separation distances shorter than 3.8 Å. b, Interaction of loop E with the N terminus of the helix of finger 4. Colours are the same as in a, with peptide side chains in yellow. The hydrogen-bond interactions between protein and RNA are listed in Fig. 2c. The bulged base 75G is gripped by hydrogen bonds from Asp 120 and His 119, and its ribose by a hydrogen bond from Lys 118.

The above figure is reprinted by permission from Macmillan Publishers Ltd: Nature (2003, 426, 96-0) copyright 2003.