Enables several functions, including DNA-binding transcription activator activity, RNA polymerase II-specific; identical protein binding activity; and tau protein binding activity. Involved in positive regulation of epithelial to mesenchymal transition and secondary palate development. Acts upstream of or within several processes, including animal organ development; embryonic morphogenesis; and transmembrane receptor protein serine/threonine kinase signaling pathway. Located in cytoplasm and nucleus. Part of transcription regulator complex. Is expressed in several structures, including alimentary system; cardiovascular system; central nervous system; genitourinary system; and sensory organ. Human ortholog(s) of this gene implicated in Lynch syndrome; cervical cancer; and ovarian cancer. Orthologous to human SMAD2 (SMAD family member 2). [provided by Alliance of Genome Resources, Apr 2022]