A novel type of peroxidase gene from the white-rot fungus Trametes versicolor.
The wood-decaying fungus Trametes versicolor secretes a large number of peroxidase isozymes, presumed to partake in the degradation of lignin. From enzymic studies, two types of peroxidases have been distinguished: lignin peroxidases and manganese peroxidases. We here report the finding of a T. versicolor peroxidase gene, PG V, which displays several features not observed in previously studied peroxidase genes from white-rot fungi, such as a high number of introns (12). Eight of the 12 introns have positions equivalent to introns of peroxidase genes from another white-rot fungus, Phanerochaete chrysosporium. The gene structure of PG V appears to be primarily related to known lignin peroxidase genes, while the encoded mature 339-residue protein has several characteristics in common with manganese peroxidases. Analyses further indicate that PG V encodes a Ser instead of an Asn at a position regarded as invariant within the enzyme superfamily, with the side chain involved in hydrogen bonding with the distal His.
Jönsson
L
L
Chemical Center, University of Lund, Sweden.
Becker
H G
HG
Nyman
P O
PO
D000595:Amino Acid Sequence; D001483:Base Sequence; D004271:DNA, Fungal / Q000737:chemistry; D005658:Fungi / Q000201:enzymology* / Q000235:genetics*; D007438:Introns; D007527:Isoenzymes / Q000737:chemistry / Q000235:genetics*; D008969:Molecular Sequence Data; D009195:Peroxidase / Q000737:chemistry / Q000235:genetics*; D010544:Peroxidases / Q000737:chemistry; D016415:Sequence Alignment
D004271:DNA, Fungal; D007527:Isoenzymes; D010544:Peroxidases; C042858:lignin peroxidase; C051129:manganese peroxidase; D009195:Peroxidase