Enables superoxide dismutase activity. Involved in axonal transport; negative regulation of inflammatory response; and positive regulation of phagocytosis. Acts upstream of or within several processes, including hydrogen peroxide biosynthetic process; muscle cell cellular homeostasis; and neurogenesis. Located in extracellular space. Is expressed in several structures, including alimentary system; brain; genitourinary system; respiratory system; and sensory organ. Used to study amyotrophic lateral sclerosis type 1; dry eye syndrome; and low tension glaucoma. Human ortholog(s) of this gene implicated in several diseases, including Down syndrome; artery disease (multiple); eye disease (multiple); glucose metabolism disease (multiple); and neurodegenerative disease (multiple). Orthologous to human SOD1 (superoxide dismutase 1). [provided by Alliance of Genome Resources, Apr 2022]