1887

Abstract

The basidiomycete isolate b19, originally identified by morphological characteristics of the fruiting body as , efficiently produces manganese peroxidase (MNP) and is used for degradation of natural, persistent aromatic polymers (lignin, humic acids and brown coal components). The MNP has shown good activity in conversion of xenobiotic compounds such as polycyclic hydrocarbons and trinitrotoluene. However, this biotechnologically promising fungus has not previously been studied at the molecular biology level. We show here that according to the molecular characterization of its main MNP isozyme, b19 MNP2, and partial sequencing of its MNP3-, three lignin peroxidase- and two laccase-encoding genes, and the gene encoding the ribosomal SSU 18S RNA, that the fungus has a close phylogenetic relationship to the white-rot basidiomycete (Fr.). Ribosomal internal transcribed spacer (ITS) sequence (ITS1+5.8S+ITS2) phylogeny reclassifies b19 as a possible representative of a new species of the genus , nearest to the clade. The genus belongs to a completely different family (Corticiaceae) and order (Aphyllophorales) within the phylum Basidiomycota than the genus , which is classified in the order Agaricales, family Strophariaceae. Our results thus indicate a need for systematic re-identification of the previously named isolate b19.

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2008-08-01
2019-10-23
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