Contributes to the regulation of transcriptional activation of NF-kappa-B target genes. In the cytoplasm, inhibits the nuclear translocation of the NF-kappa-B p50 subunit (By similarity). In the nucleus, acts as transcriptional activator that promotes transcription of NF-kappa-B target genes. Contributes to the regulation of cell proliferation.
Specificity
Natural and recombinant Mouse B-cell lymphoma 3 protein homolog
Subcellular Location
Nucleus Cytoplasm Cytoplasm perinuclear region Ubiquitination via 'Lys-63'-linked ubiquitin chains is required for nuclear accumulation.
Component of a complex consisting of the NF-kappa-B p52-p52 homodimer and BCL3. Component of a complex consisting of the NF-kappa-B p50-p50 homodimer and BCL3. Interacts with N4BP2, COPS5 and PIR (By similarity). Interacts with CYLD.
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