Predicted to enable G protein-coupled receptor binding activity; cysteine-type endopeptidase activity; and thiol-dependent deubiquitinase. Predicted to be involved in protein K48-linked deubiquitination; protein K63-linked deubiquitination; and regulation of G protein-coupled receptor signaling pathway. Predicted to act upstream of or within endocytosis and proteolysis. Predicted to be located in centrosome. Predicted to be active in cytoplasm. Is expressed in ganglia; retina; and trigeminal nerve. Orthologous to human USP20 (ubiquitin specific peptidase 20). [provided by Alliance of Genome Resources, Apr 2022]