Enables SMAD binding activity; chromatin binding activity; and histone deacetylase binding activity. Acts upstream of or within several processes, including cerebellar Purkinje cell differentiation; regulation of dendrite morphogenesis; and regulation of signal transduction. Located in nucleus. Is expressed in brain; dorsal root ganglion; and spinal cord. Orthologous to human SKOR2 (SKI family transcriptional corepressor 2). [provided by Alliance of Genome Resources, Apr 2022]