Keeping in shape with half a sandwich: The structure of a picomolar organoruthenium inhibitor bound to the ATP-binding site of the protein kinase Pim-1 (see picture) demonstrates that the ruthenium center has solely a structural role in organizing the organic ligands in the three-dimensional receptor space, thus yielding a structure that is complementary in shape and functional group presentation to the active site of Pim-1.
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Debreczeni et al. (2006) studied this question.
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