Abstract
Laccase, a ligninolytic enzyme, was secreted by each ofthe white rot fungi Trametes versicolor and Pycnoporus cinnabarinusduring growth in a nitrogen-rich medium under agitated conditions. Afteraddition of 2-hydroxydibenzofuran to cell-freesupernatants of the cultures, yellow precipitates wereformed. These precipitates were poorly soluble in waterand therefore readily separated from the supernatant. Theproducts formed were more hydrophobic than thesubstrate, as indicated by their longer retention times on areverse phase high-performance liquid chromatographycolumn. Mass spectrometric analysis of the purifiedproducts indicated the formation of oligomers. Analysis ofthe mixture of products by gas chromatography and massspectrometry after derivatization with diazomethanesuggested the formation of at least three dimeric and ninetrimeric products. Carbon-carbon and carbon-oxygenbonds were identified in the dimers and trimers,respectively. The nuclear magnetic resonance spectrum ofthe main dimer suggested coupling of the two monomersat the carbon one position.
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Jonas, U., Hammer, E., Schauer, F. et al. Transformation of 2-hydroxydibenzofuran by laccases of the white rot fungi Trametes versicolor and Pycnoporus cinnabarinus and characterization of oligomerization products. Biodegradation 8, 321–327 (1997). https://doi.org/10.1023/A:1008220120431
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DOI: https://doi.org/10.1023/A:1008220120431