Predicted to enable K63-linked polyubiquitin modification-dependent protein binding activity and nucleosome binding activity. Predicted to be involved in cellular response to DNA damage stimulus and negative regulation of double-strand break repair. Predicted to be located in cytosol; nuclear lumen; and site of double-strand break. Is expressed in nervous system and retina. Orthologous to human RNF169 (ring finger protein 169). [provided by Alliance of Genome Resources, Apr 2022]