Multicopper oxidase; part of the gene cluster that mediates the biosynthesis of dinapinones DPA1 (or (M)-DPA) and DPA2 (or (P)-DPA), biaryl dihydronaphthopyranones that act in concert as inhibitors of triacylglycerol accumulation in mammalian cells (PubMed:29468784). The first step in the pathway corresponds to the biosynthesis of dihydroxy-decanoyl-CoA by the fungal type I fatty acid synthase (formed by ORF4 and ORF5) (Probable). The cluster-specific polyketide synthase (ORF7) then accepts and extends dihydroxy-decanoyl-CoA with 6 malonyl-CoA moieties and cyclizes the molecule to produce a putative polyhydroxynaphthopyranone intermediate, which is further methylated by the cluster-specific methyltransferase (ORF1) at 7-OH to produce monapinone A (MPA) (Probable). MCE catalyzes the regioselective biaryl coupling of monapinone A (MPA) at the 8,8'-positions to afford dimeric atropisomers DPA1 and DPA2 in a ratio of approximately 1:2.5 (PubMed:29468784). Monapinone E (MPE) appears also to be a substrate for MCE and provides the atropisomers dinapinones DPE1 (or (M)-DPE) and DPE2 (or (P)-DPE) (PubMed:29468784). 4 monapinone A + O2 = 2 dinapinone A + 2 H2O 4 monapinone E + O2 = 2 dinapinone E + 2 H2O Optimum pH is 4.0. Optimum temperature is 50 degrees Celsius. Secondary metabolite biosynthesis. A mixture of dinapinones A1 and A2 at a ratio of 1:1 or 1:2 leads to inhibition of triacylglycerol accumulation in mammalian cells, suggesting that these compounds might be interresting to treat obesity (PubMed:21559025). This inhibitory activity is mostly provided by dinapinone A2 but is potentiated by dinapinone A1 (PubMed:21559025, PubMed:30108268). Dinapinones do not affect diacylglycerol acyltransferase (DGAT) activity but enhance neutral lipid degradation together with induction of autophagy (PubMed:30108268). Belongs to the multicopper oxidase family.