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. 1997 Sep;63(9):3444–3450. doi: 10.1128/aem.63.9.3444-3450.1997

Regulation of Laccase Gene Transcription in Trametes versicolor

P J Collins, A Dobson
PMCID: PMC1389241  PMID: 16535685

Abstract

The expression of laccase in the white rot fungus Trametes versicolor is regulated at the level of gene transcription by copper and nitrogen. We used reverse transcription-PCR to demonstrate that as the concentration of copper or nitrogen in fungal cultures was increased, an increase in laccase activity, corresponding to increased laccase gene transcription levels, was observed. In addition, we demonstrated that the amounts of laccase mRNA and laccase activity in 10-day-old cultures were a direct function of the concentration of either 1-hydroxybenzotriazole, a previously described laccase substrate, or 2,5-xylidine, a well-known laccase inducer, in the medium. No induction was observed after the addition of two aromatic acids, ferulic acid and veratric acid, which have been shown to induce laccase production in other white rot fungi. When either copper, 2,5-xylidine, or both compounds were added to cultures grown in the absence of copper, increased laccase transcript levels were detected within 15 min. Corresponding increases in laccase activity were observed after 24-h incubation only when copper was present.

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Selected References

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