WDR5-0103 is a potent and selective WD repeat-containing protein 5 (WDR5) antagonist with Kd of 450 nM.IC50 value: 450 nM (Kd)Target: WDR5in vitro: WDR5-0103 inhibits MLL catalytic activity with an IC50 value of 39±10 μM. An increase in MLL complex concentration resulted in proportional increase in IC50 values for WDR5-0103 (83±10 and 280±12 μM at concentrations of 500 and 1000 nM of the core trimeric MLL complex respectively). These data are consistent with a mechanism of action in which WDR5-0103 antagonizes the interaction of WDR5 with MLL by competing with MLL for their mutual binding site on WDR5.
References:
[1]. Senisterra G, et al. Small-molecule inhibition of MLL activity by disruption of its interaction with WDR5. Biochem J. 2013 Jan 1;449(1):151-159.