Structure of ERK2 in complex with VTX-11e, 4-{2-[(2-CHLORO-4-FLUOROPHENYL)AMINO]-5-METHYLPYRIMIDIN-4-YL}-N-[(1S)-1-(3-CHLOROPHENYL)-2-HYDROXYETHYL]-1H-PYRROLE-2-CARBOXAMIDE
Activation of the ERK pathway is a hallmark of cancer, and targeting of upstream signaling partners led to the development of approved drugs. Recently, SCH772984 has been shown to be a selective and potent ERK1/2 inhibitor. Here we report the structu ...
Activation of the ERK pathway is a hallmark of cancer, and targeting of upstream signaling partners led to the development of approved drugs. Recently, SCH772984 has been shown to be a selective and potent ERK1/2 inhibitor. Here we report the structural mechanism for its remarkable selectivity. In ERK1/2, SCH772984 induces a so-far-unknown binding pocket that accommodates the piperazine-phenyl-pyrimidine decoration. This new binding pocket was created by an inactive conformation of the phosphate-binding loop and an outward tilt of helix αC. In contrast, structure determination of SCH772984 with the off-target haspin and JNK1 revealed two canonical but distinct type I binding modes. Notably, the new binding mode with ERK1/2 was associated with slow binding kinetics in vitro as well as in cell-based assay systems. The described binding mode of SCH772984 with ERK1/2 enables the design of a new type of specific kinase inhibitors with prolonged on-target activity.
Organizational Affiliation:
1] Structural Genomics Consortium, University of Oxford, Old Road Campus Research Building, Oxford, UK. [2] Department of Biochemistry and Molecular Medicine, George Washington University, Washington, DC, USA. [3] Target Discovery Institute, University of Oxford, Nuffield Department of Medicine Research Building, Oxford, UK.
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