Enables DNA binding activity; protein kinase activity; and transcription coactivator activity. Involved in epithelial to mesenchymal transition and positive regulation of DNA methylation-dependent heterochromatin assembly. Acts upstream of or within several processes, including DNA methylation involved in embryo development; negative regulation of single stranded viral RNA replication via double stranded DNA intermediate; and regulation of nucleobase-containing compound metabolic process. Located in euchromatin; heterochromatin; and nucleoplasm. Part of RNA polymerase II transcription regulator complex. Is expressed in several structures, including branchial arch; central nervous system; early conceptus; genitourinary system; and limb primordium. Orthologous to human TRIM28 (tripartite motif containing 28). [provided by Alliance of Genome Resources, Apr 2022]