DFG-1 Binding: A New Residue for Developing Selective Kinase Inhibitors.

Only 15% of human kinases carry a bulky residue at the DFG-1 position, providing an opportunity for the design of selective ATP-site inhibitors without the typical hinge-binding interactions. The low sequence homology among unrelated kinases with bulky DFG-1 residues provides a new paradigm for selective kinase inhibitor development.