Enables DNA-binding transcription factor activity and protein heterodimerization activity. Contributes to sequence-specific DNA binding activity. Involved in several processes, including cellular response to manganese ion; positive regulation of autophagy in response to ER overload; and regulation of transcription, DNA-templated. Located in cytoplasm and nucleus. Part of CHOP-C/EBP complex. Biomarker of several diseases, including borna disease; brain ischemia; chronic obstructive pulmonary disease; pulmonary venoocclusive disease; and ureteral obstruction. Human ortholog(s) of this gene implicated in myxoid liposarcoma. Orthologous to human DDIT3 (DNA damage inducible transcript 3). [provided by Alliance of Genome Resources, Apr 2022]