May have a role in the negative regulation of lin-12 and glp-1 transport to the cell surface (PubMed:10366590). May also have a role in a quality control mechanism for endoplasmic reticulum-Golgi transport; the budding of coatomer-coated and other species of coated vesicles, could bind cargo molecules to collect them into budding vesicles (PubMed:10366590). Involved in regulating the expression of proteasomal subunits such as rpt-3 in order to confer resistance to proteasomal dysfunction (PubMed:27528192). Golgi-derived coatomer-coated vesicles. Belongs to the EMP24/GP25L family.