Predicted to enable cupric reductase activity and ferric-chelate reductase (NADPH) activity. Predicted to be involved in several processes, including Golgi to plasma membrane transport; copper ion import; and regulated exocytosis. Predicted to act upstream of or within copper ion import across plasma membrane and iron ion import across plasma membrane. Predicted to be located in cytosol; early endosome; and trans-Golgi network transport vesicle. Predicted to be integral component of Golgi membrane. Predicted to be active in endosome and plasma membrane. Orthologous to human STEAP2 (STEAP2 metalloreductase). [provided by Alliance of Genome Resources, Apr 2022]