Predicted to enable SUMO binding activity and SUMO-specific isopeptidase activity. Predicted to be involved in several processes, including Cajal body organization; protein desumoylation; and snRNA transcription. Predicted to act upstream of or within blastocyst formation. Predicted to be active in Cajal body. Orthologous to human USPL1 (ubiquitin specific peptidase like 1). [provided by Alliance of Genome Resources, Apr 2022]