Enables DNA binding activity; metal ion binding activity; and nuclease activity. Acts upstream of or within DNA repair and DNA replication. Predicted to be located in mitochondrion; nucleolus; and nucleoplasm. Predicted to be part of protein-containing complex. Predicted to be active in nucleus. Predicted to colocalize with chromosome, telomeric region. Is expressed in several structures, including brain; genitourinary system; liver; lung; and spleen. Orthologous to human FEN1 (flap structure-specific endonuclease 1). [provided by Alliance of Genome Resources, Apr 2022]