Non-reducing polyketide synthase; part of the gene cluster that mediates the biosynthesis of dihydroxynaphthalene (DHN)-melanin, a bluish-green pigment forming a dark layer in the conidial wall that protects the conidia from UV radiations (PubMed:28517364). The first step of the pathway is the production of the pentaketide 1,3,6,8-tetrahydroxynaphthalene (1,3,6,8-THN or T4HN) by the polyketide synthase PfmaE though condensation of acetyl-CoA with malonyl-CoA. T4HN is not stable and easily oxidizes into the stable form flaviolin (PubMed:28517364). T4HN is also substrate of the hydroxynaphthalene reductase PfmaG to yield scytalone (PubMed:28517364). The scytalone dehydratase PfmaJ then reduces scytalone to 1,3,8-THN (PubMed:31116900). 1,3,8-THN is then substrate of the hydroxynaphthalene reductase PfmaI to yield vermelone (Probable). Vermelone is further converted by the multicopper oxidase PfmaD to 1,8-DHN (Probable). Finally the laccase PFICI_06862 transforms 1,8-DHN to DHN-melanin (Probable). The roles of the 5-oxoprolinase PfmaA and the proline iminopeptidase PfmaB within the cluster have not been elucidated yet (Probable). Pigment biosynthesis; melanin biosynthesis. Expression is positively regulazed by the cluster-specific transcription factor pfmaF. Multidomain protein; including a starter unit:ACP transacylase (SAT) that selects the starter unit; a ketosynthase (KS) that catalyzes repeated decarboxylative condensation to elongate the polyketide backbone; a malonyl-CoA:ACP transacylase (MAT) that selects and transfers the extender unit malonyl-CoA; a product template (PT) domain that controls the immediate cyclization regioselectivity of the reactive polyketide backbone; a thioesterase (TE) domain that releases the newly synthesized peptide from the enzyme; and 2 acyl-carrier protein (ACP) that serve as the tethers of the growing and completed polyketide via its phosphopantetheinyl arm. Leads to decreased pigmentation, the lack of the black pigment cell wall layer, but also incomplete multicellular formation (PubMed:28517364). Abolishes the production of scytalone (PubMed:28517364). Significantly reduces the germination rates under UV treatment (PubMed:28517364).