Iron transport multicopper oxidase, which is required for Fe(2+) high affinity uptake. May be required to oxidize Fe(2+) and release it from the transporter. Essential component of copper-dependent iron transport. Binds 4 Cu cations per monomer. Interacts with FTH1. Present with 2840 molecules/cell in log phase SD medium. Belongs to the multicopper oxidase family.