Enables superoxide-generating NADPH oxidase activator activity. Acts upstream of or within superoxide metabolic process. Predicted to be located in plasma membrane. Predicted to be part of NADPH oxidase complex. Predicted to be active in cytoplasm. Is expressed in inner ear vestibular component; rectum; and submandibular gland primordium. Orthologous to human NOXO1 (NADPH oxidase organizer 1). [provided by Alliance of Genome Resources, Apr 2022]