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xptC | Dehydrogenase xptC; Dehydrogenase involved in the conversion of monodictyphenone to the prenyl xanthones such as emericellin, shamixanthone and epishamixanthone. Monodictyphenone is first converted to variecoxanthone A via a paeciloxanthone intermediate by the consecutive actions of the FAD-dependent monooxygenase mdpD and the xanthone prenyltransferase xptB. XptB catalyzes regular O-prenylation at the hydroxy group of C-7 of the xanthone ring. Variecoxanthone A is further prenylated to emericellin by xptA before being reduced to shamixanthone and epishamixanthone by the dehydrogenase xptC. (622 aa) | ||||
napA | AP-1-like transcription factor napA; Transcription activator involved in oxidative stress response, specifically during hyphal growth. Regulates the transcription of genes encoding antioxidant enzymes and components of the cellular thiol-reducing pathways including the mycelium-specific catalase catB (but not the conidia-specific catalase catA), thioredoxin reductase trxB and thioredoxin thiO. Preferentially binds to promoters with the core binding site 5'-TTA[CG]TAA-3'. Activity of the transcription factor is controlled through oxidation of specific cysteine residues resulting in the [...] (577 aa) | ||||
xptA | Xanthone prenyltransferase A; Dehydrogenase involved in the conversion of monodictyphenone to the prenyl xanthones such as emericellin, shamixanthone and epishamixanthone. Monodictyphenone is first converted to variecoxanthone A via a paeciloxanthone intermediate by the consecutive actions of the FAD-dependent monooxygenase mdpD and the xanthone prenyltransferase xptB. XptB catalyzes regular O-prenylation at the hydroxy group of C-7 of the xanthone ring. Variecoxanthone A is further prenylated to emericellin by xptA before being reduced to shamixanthone and epishamixanthone by the dehy [...] (446 aa) | ||||
mdpG | Atrochrysone carboxylic acid synthase; Non-reducing polyketide synthase; part of the gene cluster that mediates the biosynthesis of monodictyphenone, a prenyl xanthone derivative. The pathway begins with the synthesis of atrochrysone thioester by the polyketide synthase (PKS) mdpG. The atrochrysone carboxyl ACP thioesterase mdpF then breaks the thioester bond and releases the atrochrysone carboxylic acid from mdpG. The atrochrysone carboxylic acid is then converted to atrochrysone which is further transformed into emodin anthrone. The next step is performed by the anthrone oxygenase md [...] (1806 aa) |