Figure 6. Optineurin is required for deubiquitination of RIP by CYLD.
HeLa cells were infected with adenoviruses expressing shRNA against optineurin or with control adenoviruses. After 48 hrs of infection, cells were either left untransfected or transfected with HA- CYLD, treated with TNFα for 10 min after 30 h of transfection and subjected to immunoprecipitation with RIP or control antibodies. Immunoprecipitates were then subjected to western blotting with RIP antibody. The blot was then reprobed with Lys63-linked polyubiquitin (K63-Ub) antibody. HeLa cells were infected with adenoviruses expressing wild-type optineurin or H486R mutant. After 4 h of infection, cells were either left untransfected or transfected with HA- CYLD, treated with TNFα for 10 min after 24 h of transfection and subjected to immunoprecipitation with RIP or control antibodies. Immunoprecipitates were then subjected to western blotting with RIP antibody. The blot was then reprobed with Lys63-linked polyubiquitin (K63-Ub) antibody.