SENP6 (SUMO specific peptidase 6) is a desumoylating enzyme that removes SUMO modifications from target proteins, particularly showing preference for poly-SUMO2 and poly-SUMO3 chains over SUMO1 1. The enzyme plays critical roles in multiple cellular processes through its desumoylation activity. In mitochondrial biology, SENP6 maintains mitochondrial homeostasis by desumoylating TOM40, a component of the mitochondrial protein import machinery, with impaired SENP6 function leading to disrupted protein import and mitochondrial dysfunction 2. SENP6 regulates oxidative stress responses by desumoylating Nrf2, with increased SENP6 activity promoting Nrf2 degradation and exacerbating neuronal damage following ischemic stroke 3. The enzyme also modulates innate immune responses by desumoylating USP8, which affects interferon signaling through regulation of IFNAR2 stability 4. In cancer biology, SENP6 facilitates telomere cluster dissolution in alternative lengthening of telomeres (ALT)-dependent cancers, making it a potential therapeutic target 5. Additionally, SENP6 expression serves as a biomarker for liver transplantation tolerance, showing strong predictive capacity in clinical studies 6. The enzyme's diverse substrate specificity and cellular localization enable it to coordinate multiple stress response pathways.