sniper(er) 110

SNIPER(ER)-110 comprises a cIAP1 ligand and an estrogen ligand connected by a linker. SNIPER(ER)-51 induces estrogen receptor (ER) protein degradation with DC50s of <3 nM and 7.7 nM after 4 h and 48 h, respectively [1].

SNIPER(ER)-87 is a chemical compound composed of a derivative of the inhibitor of apoptosis protein (IAP) ligand LCL161 conjugated to the estrogen receptor α (ERα) ligand 4-hydroxytamoxifen using a PEG linker. It effectively degrades the ERα protein with an IC50 value of 0.097 μM. Within cells, SNIPER(ER)-87 selectively recruits XIAP to ERα, and XIAP functions as the primary E3 ubiquitin ligase responsible for the degradation of ERα induced by SNIPER(ER)-87[1][2].