SUMO-specific isopeptidase USPL1 (USPL1)

SUMO-specific isopeptidase involved in protein desumoylation. Specifically binds SUMO proteins with a higher affinity for SUMO2 and SUMO3 which it cleaves more economically.

Also able to process full-length SUMO proteins to their adult forms (PubMed:22878415). Plays a key role in RNA polymerase-II- mediated snRNA transcription in the Cajal bodies (PubMed:24413172).