Predicted to enable DNA end binding activity and DNA polymerase binding activity. Predicted to be involved in DNA metabolic process; lymphocyte differentiation; and response to ionizing radiation. Predicted to be located in fibrillar center and nucleoplasm. Predicted to be part of DNA ligase IV complex and nonhomologous end joining complex. Predicted to be active in site of double-strand break. Orthologous to human NHEJ1 (non-homologous end joining factor 1). [provided by Alliance of Genome Resources, Apr 2022]