Predicted to enable several functions, including promoter-specific chromatin binding activity; transcription corepressor activity; and ubiquitin-protein transferase activity. Predicted to be involved in innate immune response; protein sumoylation; and regulation of transcription, DNA-templated. Predicted to be part of RNA polymerase II transcription regulator complex. Predicted to be active in chromatin and nucleoplasm. Orthologous to human RFPL4B (ret finger protein like 4B). [provided by Alliance of Genome Resources, Apr 2022]