Assessment of Bromodomain Target Engagement by a Series of BI2536 Analogues with Miniaturized BET-BRET.
Luke W KoblanDennis L BuckleyChristopher J OttMark E FitzgeraldStuart W J EmberJin-Yi ZhuShuai LiuJustin M RobertsDavid RemillardSarah VittoriWei ZhangErnst SchonbrunnJames E BradnerPublished in: ChemMedChem (2016)
Evaluating the engagement of a small molecule ligand with a protein target in cells provides useful information for chemical probe optimization and pharmaceutical development. While several techniques exist that can be performed in a low-throughput manner, systematic evaluation of large compound libraries remains a challenge. In-cell engagement measurements are especially useful when evaluating compound classes suspected to target multiple cellular factors. In this study we used a bioluminescent resonant energy transfer assay to assess bromodomain engagement by a compound series containing bromodomain- and kinase-biasing polypharmacophores based on the known dual BRD4 bromodomain/PLK1 kinase inhibitor BI2536. With this assay, we discovered several novel agents with bromodomain-selective specificity profiles and cellular activity. Thus, this platform aids in distinguishing molecules whose cellular activity is difficult to assess due to polypharmacologic effects.
Keyphrases
- energy transfer
- social media
- small molecule
- high throughput
- quantum dots
- induced apoptosis
- protein protein
- health information
- healthcare
- cell therapy
- molecular docking
- stem cells
- tyrosine kinase
- living cells
- mesenchymal stem cells
- signaling pathway
- protein kinase
- amino acid
- fluorescent probe
- clinical evaluation
- structural basis