RING finger and CHY zinc finger domain-containing protein 1 (RCHY1)

Mediates E3-dependent ubiquitination and proteasomal degradation of target proteins, including p53/TP53, P73, HDAC1 and CDKN1B. Preferentially acts on tetrameric p53/TP53.

Monoubiquitinates the translesion DNA polymerase POLH. Contributes to the regulation of the cell cycle progression.