Enables several functions, including DNA-binding transcription factor activity; histone deacetylase binding activity; and identical protein binding activity. Involved in several processes, including cellular response to hydrogen peroxide; negative regulation of transcription by RNA polymerase II; and response to estradiol. Located in nucleus. Biomarker of pulmonary fibrosis. Human ortholog(s) of this gene implicated in aortic valve disease 2; atrioventricular block; congenital heart disease (multiple); and congenital nongoitrous hypothyroidism 5. Orthologous to human NKX2-5 (NK2 homeobox 5). [provided by Alliance of Genome Resources, Apr 2022]