Figure 5. Effect of mutating a residue in the residue-ligand interaction energies for the A_2AAR−NECA complex.

(A) Correlation diagram showing the change in non-bonded interaction energies (electrostatic – top, van der Waals – bottom) for relevant binding site residues (y-axis) upon a given alanine mutation (x-axis). Only residues with any absolute interaction energy change above 1 kcal/mol are shown, where the water molecules are present throughout the MD simulations and also observed in the crystal structure. (B) The corresponding affected residues and water molecules are shown in sticks for the initial 3D structure of the complex.