Predicted to enable chromatin binding activity and transcription corepressor activity. Predicted to be involved in negative regulation of transcription, DNA-templated. Predicted to act upstream of or within animal organ development and regulation of transcription, DNA-templated. Predicted to be located in several cellular components, including cytoskeleton; cytosol; and membrane raft. Orthologous to human CYS1 (cystin 1). [provided by Alliance of Genome Resources, Apr 2022]