Serveur d'exploration sur la pourriture ligneuse

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Purification and characterization of a novel lignin peroxidase from white-rot fungus Phanerochaete sordida YK-624.

Identifieur interne : 001820 ( Main/Exploration ); précédent : 001819; suivant : 001821

Purification and characterization of a novel lignin peroxidase from white-rot fungus Phanerochaete sordida YK-624.

Auteurs : Mutsumi Sugiura [Japon] ; Hirofumi Hirai ; Tomoaki Nishida

Source :

RBID : pubmed:12892894

Descripteurs français

English descriptors

Abstract

We characterized kinetics and substrate oxidation of a novel lignin peroxidase (YK-LiP) isolated from white-rot fungus Phanerochaete sordida YK-624. YK-LiP enzyme was identified and purified to homogeneity by anion-exchange chromatography and gel permeation chromatography. The molecular mass of YK-LiP was approximately 50 kDa, and the absorption spectrum of YK-LiP was almost the same as that of the LiP (Pc-LiP) from Phanerochaete chrysosporium. Steady-state kinetics of veratryl alcohol oxidation by YK-LiP (unlike that by Pc-LiP) revealed a bi-reactant sequential mechanism, although reactivity of YK-LiP to various monomeric substituted aromatic compounds was similar to that of Pc-LiP. Degradation of dimeric lignin model compounds was more effective by YK-LiP than by Pc-LiP, and the oxidation rate of sinapyl alcohol oligomer by YK-LiP was much faster than that by Pc-LiP.

DOI: 10.1016/S0378-1097(03)00447-6
PubMed: 12892894


Affiliations:


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Le document en format XML

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