Predicted to enable 3'-5'-exoribonuclease activity. Predicted to act upstream of or within nucleobase-containing compound metabolic process. Located in mitochondrion. Is expressed in several structures, including brain; cardiovascular system; genitourinary system; gut; and respiratory system. Orthologous to human REXO2 (RNA exonuclease 2). [provided by Alliance of Genome Resources, Apr 2022]