Enables DNA binding activity. Involved in several processes, including cerebellar cortex morphogenesis; neural precursor cell proliferation; and regulation of cell population proliferation. Located in nucleus. Colocalizes with euchromatin. Is expressed in several structures, including bone; central nervous system; dorsal root ganglion; sensory organ; and submandibular gland primordium. Orthologous to human TRNP1 (TMF1 regulated nuclear protein 1).