NMR-driven discovery of benzoylanthranilic acid inhibitors of far upstream element binding protein binding to the human oncogene c-myc promoter

Journal of Medicinal Chemistry
Jeffrey R HuthPhilip J Hajduk

Abstract

Reversal of aberrant gene expression that is induced by the proto-oncogene c-myc is likely to be effective for treating a variety of tumors that rely on this pathway for growth. One strategy to down-regulate the c-myc pathway is to target transcription factors that regulate its own expression. A host of proteins act in coordination to regulate c-myc expression and any one of them are theoretical targets for small-molecule therapy. Experimentally, it has been shown that the far upstream element (FUSE) binding protein (FBP) is essential for c-myc expression, and reductions in FBP levels both reduce c-myc expression and correlate with slower cell growth. FBP binds to ssDNA by capturing exposed DNA bases in a hydrophobic pocket. This suggests that a small molecule could be designed to occupy this pocket and inhibit FBP function. Using a variety of screening methodologies, we have identified ligands that bind to the DNA binding pockets of the KH domains of FBP. Gel shift analyses using full length FBP and a related transcription factor confirm that a small-molecule lead compound inhibits DNA binding in a specific manner. The benzoylanthranilic acid compounds described here represent leads in the design of FBP inhibitors that can ser...Continue Reading

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Apr 2, 2005·Nature Reviews. Cancer·Stephen Neidle, David E Thurston
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