Kinetic and antigenic similarities for cellobiose dehydrogenase from the brown rot fungus Coniophora puteana and the white rot fungus Phanerochaete chrysosporium

Abstract Cellobiose dehydrogenase was purified from the brown rot fungus Coniophora puteana . Strong cross-reaction was observed with antibodies to cellobiose:quinone oxidoreductase from the white rot fungus Phanerochaete chrysosporium . Kinetic measurements were made with cellobiose as electron donor. Ferricyanide and DCPIP both showed a pH optimum close to pH 4, but activity with ferricyanide declined more rapidly when the pH was raised. Dioxygen reduction to hydrogen peroxide was observed, but at a much lower rate than for other acceptors. These properties are similar to those of cellobiose dehydrogenase from P. chrysosporium , despite differences between brown and white rot modes of decay.