Enables superoxide dismutase activity. Acts upstream of or within several processes, including animal organ development; apoptotic signaling pathway; and regulation of cellular biosynthetic process. Located in mitochondrion. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; heart; and sensory organ. Used to study Canavan disease; Leigh disease; amyotrophic lateral sclerosis type 1; congestive heart failure; and dilated cardiomyopathy. Human ortholog(s) of this gene implicated in several diseases, including artery disease (multiple); autoimmune disease (multiple); lipid storage disease (multiple); liver disease (multiple); and optic nerve disease (multiple). Orthologous to human SOD2 (superoxide dismutase 2). [provided by Alliance of Genome Resources, Apr 2022]