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Purpose A frequently used chemotherapeutic agent in hyperthermic intraperitoneal chemotherapy (HIPEC) is mitomycin C (MMC) which induces DNA damage and apoptosis in tumor cells. In addition, MMC activates DNA damage response (DDR) leading to repair mechanisms counteracting the effect of chemotherapy. COP9 signalosome (CSN) positively influences the DDR pathway by its intrinsic deneddylating and associated...
In concert with the ubiquitin (Ub) proteasome system (UPS) the COP9 signalosome (CSN) controls the stability of cellular regulators. The CSN interacts with cullin-RING Ub ligases (CRLs) consisting of a specific cullin, a RING protein as Rbx1 and substrate recognition proteins. The Ub-like protein Nedd8 is covalently linked to cullins and removed by the CSN-mediated deneddylation. Cycles of neddylation...
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