Enables double-stranded DNA binding activity. Involved in several processes, including cellular response to DNA damage stimulus; negative regulation of viral entry into host cell; and response to human chorionic gonadotropin. Located in several cellular components, including inclusion body; nuclear lumen; and perinuclear region of cytoplasm. Used to study liver cirrhosis and myocardial infarction. Human ortholog(s) of this gene implicated in transitional cell carcinoma. Orthologous to human RAD50 (RAD50 double strand break repair protein). [provided by Alliance of Genome Resources, Apr 2022]