PMID: 11755359 , Related PDB id: 1JVP
Furet P, Meyer T, Strauss A, Raccuglia S, Rondeau JM
Structure-based design and protein X-ray analysis of a protein kinase inhibitor.
Bioorg Med Chem Lett. 2002 Jan 21;12(2):221-4.
A 5-aryl-1H-pyrazole molecular scaffold was designed to ligate the ATP binding site of cyclin dependent kinase 2 (CDK2) on the basis of crystallographic information. A search of the compound collection of Novartis using this scaffold as substructure query led to the identification of PKF049-365 as a representative of a new class of inhibitors of the cell cycle kinases CDK1/2. The three-dimensional structure of CDK2 in complex with PKF049-365 was subsequently determined by protein crystallography and refined to 1.53 A resolution. The X-ray analysis confirmed the binding mode expected from the design hypothesis. In addition, it revealed an alternative binding orientation involving a second tautomeric form of the inhibitor that was not envisaged during the design stage.