Predicted to enable 3'-flap endonuclease activity. Predicted to be involved in DNA recombination; mitotic intra-S DNA damage checkpoint signaling; and osteoblast proliferation. Predicted to act upstream of or within DNA catabolic process, endonucleolytic; DNA repair; and response to intra-S DNA damage checkpoint signaling. Predicted to be part of Holliday junction resolvase complex. Predicted to be active in nucleus. Used to study Marfan syndrome; arterial tortuosity syndrome; and pulmonary emphysema. Orthologous to human MUS81 (MUS81 structure-specific endonuclease subunit). [provided by Alliance of Genome Resources, Apr 2022]