USPL1

SUMO-specific isopeptidase involved in protein desumoylation. Specifically binds SUMO proteins with a higher affinity for SUMO2 and SUMO3 which it cleaves more efficiently. Also able to process full-length SUMO proteins to their mature forms. Plays a key role in RNA polymerase-II-mediated snRNA transcription in the Cajal bodies. Is a component of complexes that can bind to U snRNA genes..

Function from UniProtKB (Q5W0Q7), read 2026-09-23. CC BY 4.0.