Selective, Small-Molecule Co-Factor Binding Site Inhibition of a Su(var)3–9, Enhancer of Zeste, Trithorax Domain Containing Lysine Methyltransferase

The first chemical probe to primarily occupy the co-factor binding site of a Su(var)3−9, enhancer of a zeste, trithorax (SET) domain containing protein lysine methyltransferase (PKMT) is reported. Protein methyltransferases require S-adenosylmethionine (SAM) as a co-factor (methyl donor) for enzymatic activity. However, SAM itself represents a poor medicinal chemistry starting point for a selective, cell-active inhibitor given its extreme...