Involved in regulation of NF-kappa-B transcription factor complexes (, ). Inhibits NF-kappa-B activity without affecting its nuclear translocation upon stimulation . Inhibits DNA-binding of RELA and NFKB1/p50, and of the NF-kappa-B p65-p50 heterodimer and the NF-kappa-B p50-p50 homodimer . Seems also to activate NF-kappa-B-mediated transcription . In vitro, upon association with NFKB1/p50 has transcriptional activation activity and, together with NFKB1/p50 and RELA, is recruited to LCN2 promoters . Promotes transcription of LCN2 and DEFB4 . Is recruited to IL-6 promoters and activates IL-6 but decreases TNF-alpha production in response to LPS (By similarity). Seems to be involved in the induction of inflammatory genes activated through TLR/IL-1 receptor signaling (By similarity). Involved in the induction of T helper 17 cells (Th17) differentiation upon recognition of antigen by T cell antigen receptor (TCR) (By similarity).
Subcellular locations: Nucleus
Aggregated in dot-like structures . Colocalizes with NCOR2 .
Expressed at high levels in peripheral blood leukocytes and lung, at moderate levels in liver, placenta, and at low levels in spleen, kidney, skeletal muscle and heart.