Enables transcription corepressor activity. Acts upstream of or within several processes, including chromatin remodeling; negative regulation of transcription, DNA-templated; and skeletal muscle cell differentiation. Located in cytoplasm and nucleus. Is expressed in several structures, including 1st branchial arch; embryo mesenchyme; heart; maxillary process; and spleen. Orthologous to human SMYD1 (SET and MYND domain containing 1). [provided by Alliance of Genome Resources, Apr 2022]