Figure 3. Asymmetry in CA-DHp distances.
A) The distances between the catalytic His (on the DHp) and an ATP-binding Asn (on the CA) on each side of the dimer are correlated for all known HK structures. Structures representing the autophosphorylation Michaelis complex show significant asymmetry B) The DHp-CA distance is correlated with the angle between the Gripper helix and the DHp helix. The Gripper helix shows a very specific angular preference in in the autokinase Michaelis structures.
