Pomalidomide-6-OH, a Pomalidomide-derived cereblon (CRBN) ligand, facilitates the recruitment of CRBN protein. This compound can be tethered to a protein ligand through a linker to create a proteolysis-targeting chimeric molecule (PROTAC [1]).

PROTACs由连接两种不同配体的连接器构成；一个是E3泛素连接酶的配体，另一个是目标蛋白的配体。PROTACs利用细胞内的泛素-蛋白酶体系统，有选择性地降解目标蛋白[1]。