Chris J. Novotny, Gregory L. Hamilton, Frank McCormick, and Kevan M. Shokat
† Howard Hughes Medical Institute and Department of Cellular and Molecular Pharmacology, University of California San Francisco, San Francisco, California 94158, United States
‡ NCI RAS Initiative, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Leidos Biomedical Research, Inc., Frederick, Maryland 21701, United States
§ Diller Family Comprehensive Cancer Center, University of California, San Francisco, California 94158, United States
ACS Chem. Biol., Article ASAP
DOI: 10.1021/acschembio.7b00374
Mutationally activated Ras is one of the most common oncogenic drivers found across all malignancies, and its selective inhibition has long been a goal in both pharma and academia. One of the oldest and most validated methods to inhibit overactive Ras signaling is by interfering with its post-translational processing and subsequent cellular localization. Previous attempts to target Ras processing led to the development of farnesyltransferase inhibitors, which can inhibit H-Ras localization but not K-Ras due to its ability to bypass farnesyltransterase inhibition through alternative prenylation by geranylgeranyltransferase. Here, we present the creation of a neo-substrate for farnesyltransferase that prevents the alternative prenlation by geranylgeranyltransferase and mislocalizes oncogenic K-Ras in cells.
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