Automated description from the Alliance of Genome Resources (Release 7.0.0)
Enables cupric reductase activity and ferric-chelate reductase (NADPH) activity. Involved in fat cell differentiation. Acts upstream of or within copper ion import; iron import into cell; and iron ion import across cell outer membrane. Located in endosome and plasma membrane. Is expressed in brain. Orthologous to human STEAP4 (STEAP4 metalloreductase).