Predicted to enable chromatin binding activity; ubiquitin protein ligase activity; and ubiquitin-protein transferase activator activity. Predicted to be involved in histone H2A monoubiquitination and negative regulation of transcription, DNA-templated. Predicted to act upstream of or within anterior/posterior pattern specification; camera-type eye morphogenesis; and histone ubiquitination. Predicted to be located in cytosol; nuclear body; and sex chromatin. Predicted to be part of PRC1 complex. Orthologous to human RING1 (ring finger protein 1). [provided by Alliance of Genome Resources, Apr 2022]