Predicted to enable endopeptidase inhibitor activity; proteasome binding activity; and thiol-dependent deubiquitinase. Predicted to be involved in negative regulation of ER-associated ubiquitin-dependent protein catabolic process; protein deubiquitination; and regulation of chemotaxis. Predicted to act upstream of or within chemical synaptic transmission. Predicted to be located in several cellular components, including cell surface; cytoplasmic vesicle; and cytosol. Predicted to be part of proteasome complex. Orthologous to human USP14 (ubiquitin specific peptidase 14). [provided by Alliance of Genome Resources, Apr 2022]