Z-TAC enables custom and combinatorial degradation of cell surface proteins
Cell-surface degrader platforms typically require target-specific engineering and have therefore been applied to a relatively small set of protein targets. Here we report Z-TAC, a strategy that enables plug-and-play conversion of existing IgG antibodies into cell-surface protein degraders. Across multiple targets from distinct protein families, Z-TAC induced efficient and sustained degradation of both individual receptors and receptor combinations. For a multi-pass membrane receptor lacking selective antagonists, Z-TAC mediated complete receptor degradation and functional inhibition, demonstrating the ability of this platform to overcome the limitations of conventional pharmacological approaches. This study delineates a generalizable and scalable strategy for functional perturbation of the cell-surface proteome.