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. 1991 Aug;57(8):2240–2245. doi: 10.1128/aem.57.8.2240-2245.1991

Manganese regulation of manganese peroxidase expression and lignin degradation by the white rot fungus Dichomitus squalens.

F H Périé 1, M H Gold 1
PMCID: PMC183557  PMID: 1768094

Abstract

Extracellular manganese peroxidase and laccase activities were detected in cultures of Dichomitus squalens (Polyporus anceps) under conditions favoring lignin degradation. In contrast, neither extracellular lignin peroxidase nor aryl alcohol oxidase activity was detected in cultures grown under a wide variety of conditions. The mineralization of 14C-ring-, -side chain-, and -methoxy-labeled synthetic guaiacyl lignins by D. squalens and the expression of extracellular manganese peroxidase were dependent on the presence of Mn(II), suggesting that manganese peroxidase is an important component of this organism's lignin degradation system. The expression of laccase activity was independent of manganese. In contrast to previous findings with Phanerochaete chrysosporium, lignin degradation by D. squalens proceeded in the cultures containing excess carbon and nitrogen.

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Selected References

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