title: Copper radical oxidases and related extracellular oxidoreductases of wood-decay Agaricomycetes.
abstract: Extracellular peroxide generation, a key component of oxidative lignocellulose degradation, has been attributed to various enzymes including the copper radical oxidases. Encoded by a family of structurally related sequences, the genes are widely distributed among wood decay fungi including three recently completed polypore genomes. In all cases, core catalytic residues are conserved, but five subfamilies are recognized. Glyoxal oxidase, the most intensively studied representative, has been shown physiologically connected to lignin peroxidase. Relatively little is known about structure-function relationships among more recently discovered copper radical oxidases. Nevertheless, differences in substrate preferences have been observed in one case and the proteins have been detected in filtrates of various wood-grown cultures. Such diversity may reflect adaptations to host cell wall composition and changing environmental conditions.
authors.affiliation: USDA Forest Products Laboratory, Madison, WI 53726, USA. Electronic address: pkersten@wisc.edu.
authors.forename: Phil
authors.initials: P
authors.lastname: Kersten
authors.affiliation: USDA Forest Products Laboratory, Madison, WI 53726, USA. Electronic address: dcullen@wisc.edu.
authors.forename: Dan
authors.initials: D
authors.lastname: Cullen
mesh_terms: D001487:Basidiomycota / Q000201:enzymology*; D020134:Catalytic Domain; D017124:Conserved Sequence; D003300:Copper / Q000378:metabolism*; D005609:Free Radicals / Q000378:metabolism*; D008958:Models, Molecular; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D010802:Phylogeny; D011487:Protein Conformation; D017385:Sequence Homology
chemical_list: D005609:Free Radicals; D003300:Copper; D010088:Oxidoreductases
keywords: Brown rot; Glyoxal oxidase; Lignin; Lignin peroxidase; White rot