Small-molecule inhibitors binding to protein kinase. Part II: the novel pharmacophore approach of type II and type III inhibition
2008
Background: Protein kinases are essential enzymes propagating cellular signal transduction processes and consequently emerged as central targets for drug discovery against a wide range of diseases with a strong historical focus on oncological disorders. Several high-resolution crystal structures of various ATP-competitive inhibitors in complex with their target protein kinases have been determined and represent a wealth of detailed information about binding modes, inhibition mechanisms, and associated structure– activity relationships of target-bound small molecules. Objective: In this second part of a two-part review, we discuss the binding mode of inhibitors that target protein kinases in their inactive state. Methods: The scope of this review covers inhibitors for which crystal structures in complex with their respective kinases in the inactive state are available. Results: Structural parameters of both inhibitors and kinases contribute to the complexity of designing kinase inhibitors. Kinase inhibitor...
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