Enables histone deacetylase binding activity and identical protein binding activity. Involved in negative regulation of transcription, DNA-templated. Acts upstream of or within blastocyst hatching. Part of Sin3 complex. Is expressed in early conceptus; ovary; secondary oocyte; and seminiferous cord. Orthologous to human SUDS3 (SDS3 homolog, SIN3A corepressor complex component). [provided by Alliance of Genome Resources, Apr 2022]