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ID: ALA4622984
Journal: J Med Chem
Title: Structure-Based Design of a Bromodomain and Extraterminal Domain (BET) Inhibitor Selective for the N-Terminal Bromodomains That Retains an Anti-inflammatory and Antiproliferative Phenotype.
Authors: Wellaway CR, Bamborough P, Bernard SG, Chung CW, Craggs PD, Cutler L, Demont EH, Evans JP, Gordon L, Karamshi B, Lewis AJ, Lindon MJ, Mitchell DJ, Rioja I, Soden PE, Taylor S, Watson RJ, Willis R, Woolven JM, Wyspiańska BS, Kerr WJ, Prinjha RK.
Abstract: The bromodomain and extraterminal domain (BET) family of epigenetic regulators comprises four proteins (BRD2, BRD3, BRD4, BRDT), each containing tandem bromodomains. To date, small molecule inhibitors of these proteins typically bind all eight bromodomains of the family with similar affinity, resulting in a diverse range of biological effects. To enable further understanding of the broad phenotype characteristic of pan-BET inhibition, the development of inhibitors selective for individual, or sets of, bromodomains within the family is required. In this regard, we report the discovery of a potent probe molecule possessing up to 150-fold selectivity for the N-terminal bromodomains (BD1s) over the C-terminal bromodomains (BD2s) of the BETs. Guided by structural information, a specific amino acid difference between BD1 and BD2 domains was targeted for selective interaction with chemical functionality appended to the previously developed I-BET151 scaffold. Data presented herein demonstrate that selective inhibition of BD1 domains is sufficient to drive anti-inflammatory and antiproliferative effects.
CiteXplore: 32787145