Predicted to enable 3'-5' exonuclease activity. Predicted to be involved in DNA repair; cellular response to ionizing radiation; and negative regulation of cell cycle phase transition. Predicted to act upstream of or within cellular response to DNA damage stimulus. Predicted to be located in chromosome and nucleoplasm. Predicted to be part of checkpoint clamp complex. Is expressed in several structures, including alimentary system; brain; cardiovascular system; genitourinary system; and hemolymphoid system gland. Orthologous to human RAD1 (RAD1 checkpoint DNA exonuclease). [provided by Alliance of Genome Resources, Apr 2022]