Serveur d'exploration sur le phanerochaete

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A novel type of peroxidase gene from the white-rot fungus Trametes versicolor.

Identifieur interne : 000D71 ( Main/Exploration ); précédent : 000D70; suivant : 000D72

A novel type of peroxidase gene from the white-rot fungus Trametes versicolor.

Auteurs : L. Jönsson [Suède] ; H G Becker ; P O Nyman

Source :

RBID : pubmed:8075158

Descripteurs français

English descriptors

Abstract

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.

DOI: 10.1016/0167-4838(94)00083-2
PubMed: 8075158


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">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.</div>
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