Trafficking adaptor for the Dsc E3 ligase complex; component of a Dsc subcomplex that diverts the E3 ligase via the AP-3 pathway directly to the limiting membrane of the vacuole; involved in the endosome and Golgi-associated degradation pathway (EGAD), contributing to proteostasis and lipid homeostasis; localizes to the vacuole; localizes to the ER in high-throughput studies; expression is directly regulated by the metabolic and meiotic transcriptional regulator Ume6p; non-essential gene