MS78 is an acetylation targeting chimera ( AceTAC ) that acetylates the p53 tumor suppressor protein. MS78 recruits histone acetyltransferase p300/CBP to acetylate the p53Y220C mutant. MS78 upregulates TRAIL apoptotic genes and downregulates DNA damage response pathways. MS78 contains a CBP/p300 binder, a p53Y220C binder and a linker.