Abstract
Post-translational modifications play vital roles in fine-tuning a myriad of physiological processes, and one of the most important modifications is acetylation. Here, we report a ligand-directed site-selective acetylation using KHAc, a derivative of a phosphoglycerate mutase 1 (PGAM1) inhibitor. KHAc binds to PGAM1 and transfers its acetyl group to the ε-NH2 of Lys100 to inactivate the enzyme. The acetyl transfer process was visualized by time-resolved crystallography, demonstrating that the transfer is driven by proximity effects. KHAc was capable of selectively and effectively acetylating Lys100 of PGAM1 in cultured human cells, accompanied by inhibited F-actin formation. Similar strategies could be used for exogenous control of other lysine post-translational modifications.
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