Homer (WDR5 Degrader 8g) is a cell-permeable highly efficacious and potent WDR5-selective heterobifunctional degrader composed of WDR5 antagonist OICR-9429 analog plus a butyl chain spacer linked to an E3 ubiquitin ligase von Hippel-Lindau (VHL)-binding ligand th at effectively depletes WDR5 in various cancer cell lines (Dmax = 58% and DC50 = 53 nM in MV4-11WDR5-HiBiT cells, 24 h). Homer is shown to dose-dependently induce WDR5 ubiquitylation and proteasomal degradation (Kd = 18 nM; IC50 cellular & lysate = 13.6 & 2.15 μM, respectively, NanoBRET assay).
