Iron transport multicopper oxidase, which is required for Fe(2+) high affinity uptake (PubMed:17138696). May be required to oxidize Fe(2+) and release it from the transporter (PubMed:17138696). Essential component of copper-dependent iron transport (PubMed:17138696). Binds 4 Cu cations per monomer. Expression regulated by iron through the urbs1 transcription factor (PubMed:17138696). Strongly reduces virulence (PubMed:17138696). Belongs to the multicopper oxidase family.