The oxidation of veratryl alcohol, dimeric lignin models and lignin by lignin peroxidase: The redox cycle revisited
نویسندگان
چکیده
منابع مشابه
Veratryl alcohol-dependent production of molecular oxygen by lignin peroxidase.
Veratryl alcohol- and H2O2-dependent production of oxygen by lignin peroxidase isozyme H2 (LiPH2) from Phanerochaete chrysosporium was investigated. Veratryl alcohol oxidation by LiPH2 decreased with increasing concentrations of H2O2 while oxygen evolution increased. The absorption spectrum of the LiPH2 in these experiments indicated that it was in the compound II state. We propose that O2 prod...
متن کاملLignin peroxidase oxidation of Mn2+ in the presence of veratryl alcohol, malonic or oxalic acid, and oxygen.
Veratryl alcohol (3,4-dimethoxybenzyl alcohol) appears to have multiple roles in lignin degradation by Phanerochaete chrysosporium. It is synthesized de novo by the fungus. It apparently induces expression of lignin peroxidase (LiP), and it protects LiP from inactivation by H2O2. In addition, veratryl alcohol has been shown to potentiate LiP oxidation of compounds that are not good LiP substrat...
متن کاملOn the interaction of lignin peroxidase with lignin
The mechanism by which lignin peroxidase (Lip) interacts with the lignin polymer is discussed. Veratryl alcohol (Valc), a secondary metabolite of white rot fungi, acts as a cofactor for the enzyme. The Lip-redox cycle is discussed in terms of Marcus theory of electron transfer. It is proposed that reaction of a nucleophile in the active site channel with the incipient Valc'. is an essential eve...
متن کاملManganese regulation of veratryl alcohol in white rot fungi and its indirect effect on lignin peroxidase.
Many white rot fungi are able to produce de novo veratryl alcohol, which is known to be a cofactor involved in the degradation of lignin, lignin model compounds, and xenobiotic pollutants by lignin peroxidase (LiP). In this study, Mn nutrition was shown to strongly influence the endogenous veratryl alcohol levels in the culture fluids of N-deregulated and N-regulated white rot fungi Bjerkandera...
متن کاملLignin Peroxidase Of
Ligninase is a generic name for a group of isozymes that catalyze the oxidative depolymerization of lignin. Although undoubtedly produced by other lignin-degrading fungi, these isozymes to data have been isolated only from the basidiomycete Phanerochaete chrysosporium Burds. 1,2 These ligninases are extracellular and are produced during secondary metabolism, brought about by nutrient starvation...
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ژورنال
عنوان ژورنال: FEMS Microbiology Reviews
سال: 1994
ISSN: 0168-6445,1574-6976
DOI: 10.1111/j.1574-6976.1994.tb00052.x