RNF144B (Ring Finger Protein 144B): RNF144B is a gene that encodes a protein belonging to the RING finger family, which is involved in regulating protein degradation and cellular signaling. Its RING domain provides E3 ubiquitin ligase activity, allowing it to tag proteins for degradation through the ubiquitin-proteasome system. RNF144B plays a key role in maintaining protein balance and proper cellular function.