E3 ubiquitin-protein ligase RAD18, hHR18, hRAD18, RAD18, RAD18, S. cerevisiae, homolog, RING finger protein 73, RNF73,
RAD18 a structural maintenance of chromosomes (SMC) protein involved in postreplication repair of UV-damaged DNA. Has ssDNA binding activity. Interacts with Rad6 through a conserved ring-finger motif. Rad6 is an ubiquitin-conjugating enzyme required for post-replication repair of damaged DNA.