Enables DNA-binding transcription factor activity and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Acts upstream of or within several processes, including brain development; conditioned taste aversion; and specification of animal organ identity. Located in nucleus. Is expressed in several structures, including alimentary system; brain; genitourinary system; heart; and sensory organ. Used to study autism spectrum disorder. Human ortholog(s) of this gene implicated in autistic disorder. Orthologous to human TBR1 (T-box brain transcription factor 1). [provided by Alliance of Genome Resources, Apr 2022]