Laccase that catalyzes the oxidation of certain aromatic compounds, including L-dopa, to quinones, which then polymerize to melanin (By similarity). Able to oxidize a wide variety of aromatic diphenol and diamino groups in the ortho, meta, and para positions but not monophenolic groups such as in phenol, tyramine, or tyrosine (By similarity). Plays an important role in virulence (By similarity). Plays a role in dissemination to extrapulmonary sites but is not involved in pulmonary growth or in elicitation of cellular immune responses in the lung (By similarity). 4 hydroquinone + O2 = 4 benzosemiquinone + 2 H2O Binds 4 Cu cations per monomer. Does not associate with the cell membrane. Induced by copper (PubMed:12581355). Transcriptional induction by copper is dependent on enhancer region II, at position -1792 to -1614 within the 5'-untranslated region (PubMed:12581355). Belongs to the multicopper oxidase family.