RNF220 (Ring Finger Protein 220): RNF220 is a gene that encodes a protein belonging to the RING finger family, characterized by a zinc finger domain that provides E3 ubiquitin ligase activity. This protein plays an important role in the ubiquitin-proteasome system, which manages protein degradation and turnover. Through its E3 ligase function, RNF220 helps regulate the stability and activity of specific cellular proteins, supporting processes like signal transduction, DNA repair, and maintaining cellular homeostasis.