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Oxidation of non‐phenolic substrates
Author(s) -
Bourbonnais Robert,
Paice Michael G.
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)80298-w
Subject(s) - laccase , abts , lignin , chemistry , oxidizing agent , organic chemistry , lignin peroxidase , trametes versicolor , benzaldehyde , phenols , dimer , antioxidant , enzyme , catalysis , dpph
In the presence of substrates such as Remazol Blue and 2,2'‐azinobis(3‐ethylbenzthiazoline‐6‐sulphonate) (ABTS), laccases Coriolus (Trametes) versicolor can also oxidize non‐phenolic lignin model compounds. Veratryl alcohol (I) and 1‐(3,4‐dimethoxyphenyl)‐2‐(2‐methoxyphenoxy)‐propane‐1, 3‐diol (III) were oxidized by laccase and mediator to give the α‐carbonyl derivatives. The β‐1 lignin model dimer, 1‐(3,4‐dimethoxyphenyl)‐2‐phenoxy‐ethane‐1, 2‐diol(II) was cleaved by laccase in the presence of ABTS to give veratraldehyde and benzaldehyde. On the basis of these observations, we propose that laccase is capable of oxidizing both phenolic and non‐phenolic moieties of lignin but that the latter is dependent on the co‐presence of primary laccase substrates.