Mechanism-based design of a protein kinase inhibitor.Parang, K., Till, J.H., Ablooglu, A.J., Kohanski, R.A., Hubbard, S.R., Cole, P.A.
(2001) Nat Struct Biol 8: 37-41
- PubMed: 11135668
- DOI: https://doi.org/10.1038/83028
- Primary Citation of Related Structures:
- PubMed Abstract:
Protein kinase inhibitors have applications as anticancer therapeutic agents and biological tools in cell signaling. Based on a phosphoryl transfer mechanism involving a dissociative transition state, a potent and selective bisubstrate inhibitor for the insulin receptor tyrosine kinase was synthesized by linking ATPgammaS to a peptide substrate analog via a two-carbon spacer. The compound was a high affinity competitive inhibitor against both nucleotide and peptide substrates and showed a slow off-rate. A crystal structure of this inhibitor bound to the tyrosine kinase domain of the insulin receptor confirmed the key design features inspired by a dissociative transition state, and revealed that the linker takes part in the octahedral coordination of an active site Mg2+. These studies suggest a general strategy for the development of selective protein kinase inhibitors.
The Johns Hopkins University School of Medicine, Department of Pharmacology Molecular Sciences, Baltimore, Maryland 21205, USA.