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    Author(s): Tomas Johansson; Per Olof Nyman; Daniel Cullen
    Date: 2002
    Source: Applied and environmental microbiology. Vol. 68, no. 4 (Apr. 2002): Pages 2077-2080
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (265 KB)


    A peroxidase-encoding gene, mnp2, and its corresponding cDNA were characterized from the white-rot basidiomycete Trametes versicolor PRL 572. We used quantitative reverse transcriptase-mediated PCR to identify mnp2 transcripts in nutrient-limited stationary cultures. Although mnp2 lacks upstream metal response elements (MREs), addition of MnSO4 to cultures increased mnp2 transcript levels 250-fold. In contrast, transcript levels of an MRE-containing gene of T. versicolor, mnp1, increased only eightfold under the same conditions. Thus, the manganese peroxidase genes in T. versicolor are differentially regulated, and upstream MREs are not necessarily involved. Our results support the hypothesis that fungal and plant peroxidases arose through an ancient duplication and folding of two structural domains, since we found the mnp1 and mnp2 polypeptides to have internal homology.

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    Johansson, Tomas; Nyman, Per Olof; Cullen, Daniel. 2002. Differential regulation of mnp2, a new manganese peroxidase-encoding gene from the ligninolytic fungus Trametes versicolor PRL 572. Applied and environmental microbiology. Vol. 68, no. 4 (Apr. 2002): Pages 2077-2080


    Trametes versicolor, manganese peroxidase-encoding gene, wood-decaying fungi, peroxidase-encoding gene, mnp2, Basidiomycetes

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