Enables DNA-binding transcription factor activity. Involved in several processes, including cellular response to glial cell derived neurotrophic factor; positive regulation of cell proliferation in midbrain; and response to alkaloid. Located in chromatin; cytoplasm; and nucleus. Human ortholog(s) of this gene implicated in anterior segment dysgenesis; anterior segment dysgenesis 1; cataract; cataract 11 multiple types; and cataract 9 multiple types. Orthologous to human PITX3 (paired like homeodomain 3). [provided by Alliance of Genome Resources, Apr 2022]