Function:Inhibits NF-kappa-B by complexing with and trapping it in the cytoplasm. However , the unphosphorylated form resynthesized after cell stimulation is able to bind NF-kappa-B allowing its transport to the nucleus and protecting it to further IKBA-dependent inactivation. Association with inhibitor kappa B-interacting NKIRAS1 and NKIRAS2 prevent its phosphorylation rendering it more resistant to degradation , explaining its slower degradation. ,PTM:Phosphorylated; followed by degradation. Interaction with NKIRAS1 and NKIRAS2 probably prevents phosphorylation. ,similarity:Belongs to the NF-kappa-B inhibitor family. ,similarity:Contains 6 ANK repeats. ,subunit:Interacts with THRB (via ligand-binding domain) . Interacts with RELA and REL. Interacts with COMMD1 and inhibitor kappa B-interacting Ras-like NKIRAS1 and NKIRAS2. ,tissue specificity:Expressed in all tissues examined. ,
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