Predicted to enable endopeptidase inhibitor activity; proteasome binding activity; and thiol-dependent deubiquitinase. Acts upstream of or within chemical synaptic transmission. Located in synapse. Is expressed in several structures, including alimentary system; cardiovascular system; central nervous system; genitourinary system; and respiratory system. Orthologous to human USP14 (ubiquitin specific peptidase 14). [provided by Alliance of Genome Resources, Apr 2022]