May modulate activity of cullin-RING E3 ubiquitin ligase (CRL) complexes (PubMed:21778237). May down-regulate activation of NF-kappa-B (PubMed:15799966). Modulates Na(+) transport in epithelial cells by regulation of apical cell surface expression of amiloride-sensitive sodium channel (ENaC) subunits (PubMed:23637203). Interacts with RELB and NFKB1/p105 (PubMed:15799966). Interacts with CCDC22, CCDC93, SCNN1B, CUL1 (PubMed:21778237, PubMed:23563313, PubMed:23637203, PubMed:25355947, PubMed:28892079). Ubiquitous.