STEAP3
Metalloreductase STEAP3 is an enzyme that in humans is encoded by the STEAP3 gene.
STEAP3 is a metalloreductase, capable of converting iron from an insoluble ferric to a soluble ferrous form.
STEAP3 and other STEAP protein, with the exception of STEAP1, are predicted to contain a Di-nucleotide binding domain (Rossmann Fold). This has been shown using X-ray crystallography in the cases of STEAP3 and STEAP4.