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Discovery of an Anion-Dependent Farnesyltransferase Inhibitor from a Phenotypic Screen. | LitMetric

By employing a phenotypic screen, a set of compounds, exemplified by , were identified which potentiate the ability of histone deacetylase inhibitor vorinostat to reverse HIV latency. Proteome enrichment followed by quantitative mass spectrometric analysis employing a modified analogue of as affinity bait identified farnesyl transferase (FTase) as the primary interacting protein in cell lysates. This ligand-FTase binding interaction was confirmed via X-ray crystallography and temperature dependent fluorescence studies, despite lacking structural and binding similarity to known FTase inhibitors. Although multiple lines of evidence established the binding interaction, these ligands exhibited minimal inhibitory activity in a cell-free biochemical FTase inhibition assay. Subsequent modification of the biochemical assay by increasing anion concentration demonstrated FTase inhibitory activity in this novel class. We propose binds together with the anion in the active site to inhibit farnesyl transferase. Implications for phenotypic screening deconvolution and HIV reactivation are discussed.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7812668PMC
http://dx.doi.org/10.1021/acsmedchemlett.0c00551DOI Listing

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