PROTAC ERRα Degrader-3 is a potent and selective ERRα degrader based on von Hippel-Lindau ligand. PROTAC ERRα Degrader-3 is capable of specifically degrading ERRα protein by >80% at a concentration of 30 nM. PROTAC ERRα Degrader-3 is inactive against ERRβ and ERRγ proteins.In Vitro: PROTAC ERRα Degrader-3 (compound 6c; 0.3 nM-10 μM; 4 hours) dose-dependently induces ERRα degradation with an efficacious dose as low as 3.0 nM at 4.0 h. PROTAC ERRα Degrader-3 potently decreases protein levels of ERRα downstream target genes, e.g., ATP5B, medium-chain acyl CoA dehydrogenase (MCAD), and pyruvate dehydrogenase kinase 4 (PDK4) in the MDA-MB-231 cells after a 24 h treatment.
PROTAC ERRα Degrader-3 exhibits an IC50 value of 12.67 nM to block the protein-protein interaction of ERRα with PGC-1α peptide and induces approximately 96% protein degradation at 100 nM (D100 nM) after 4.0 h treatment.