The protein encoded by this gene contains a RING finger motif. The mouse counterpart of this protein has been shown to interact with Rela, the p65 subunit of NF-kappaB (NFKB), and modulate NFKB-mediated transcription activity. The mouse protein also binds ubiquitin-conjugating enzymes (E2s) and is a substrate for E2-dependent ubiquitination. [provided by RefSeq, Jul 2008].