Predicted to enable several functions, including DNA-binding transcription activator activity, RNA polymerase II-specific; protein heterodimerization activity; and ubiquitin protein ligase binding activity. Acts upstream of or within positive regulation of transcription by RNA polymerase II. Located in nucleus. Is expressed in several structures, including embryo mesenchyme; eye; liver; long bone; and tooth. Human ortholog(s) of this gene implicated in achromatopsia 7. Orthologous to human ATF6 (activating transcription factor 6). [provided by Alliance of Genome Resources, Apr 2022]