Enables DNA-binding transcription factor activity, RNA polymerase II-specific; RNA polymerase II cis-regulatory region sequence-specific DNA binding activity; and chromatin binding activity. Involved in several processes, including heart development; negative regulation of cell death; and positive regulation of macromolecule metabolic process. Acts upstream of or within several processes, including animal organ development; embryonic morphogenesis; and regulation of gene expression. Located in chromatin and nucleus. Is expressed in several structures, including early conceptus; embryo mesenchyme; gut; heart; and reproductive system. Used to study atrial heart septal defect 2 and congenital diaphragmatic hernia. Human ortholog(s) of this gene implicated in congenital heart disease (multiple). Orthologous to human GATA4 (GATA binding protein 4). [provided by Alliance of Genome Resources, Apr 2022]