Serves as substrate adapter subunit in the E3 ubiquitin ligase complex ZYG11B-CUL2-Elongin BC (PubMed:17304241, PubMed:31273098). Acts redudantly with ZYG11B to target substrates bearing N-terminal glycine degrons for proteasomal degradation (PubMed:33093214). Involved in the clearance of proteolytic fragments generated by caspase cleavage during apoptosis since N-terminal glycine degrons are strongly enriched at caspase cleavage sites. Also important in the quality control of protein N-myristoylation in which N-terminal glycine degrons are conditionally exposed after a failure of N-myristoylation (PubMed:31273098). Interacts with the ELOC-ELOB/Elongin BC complex. Part of an E3 ubiquitin ligase complex including ZER1, CUL2 and Elongin BC. Expressed in testis, spermatocytes and spermatids (at protein level). Expressed in spermatocytes, spermatids, prostate, skeletal muscle, ovary, small intestine, heart, brain and pancreas. Belongs to the zyg-11 family.