Predicted to enable NEDD8-specific protease activity; thiol-dependent deubiquitinase; and transcription coactivator activity. Involved in neuron projection development. Predicted to be located in cytosol; nucleoplasm; and plasma membrane. Predicted to be active in cytoplasm. Orthologous to human USP21 (ubiquitin specific peptidase 21). [provided by Alliance of Genome Resources, Apr 2022]