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Mechanism of aromatic ring cleavage of β‐ O ‐4 lignin substructure models by lignin peroxidase
Author(s) -
Umezawa Toshiaki,
Higuchi Takayoshi
Publication year - 1987
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(87)81057-8
Subject(s) - phanerochaete , lignin , chemistry , lignin peroxidase , cleavage (geology) , peroxidase , ring (chemistry) , nucleophile , chrysosporium , substructure , stereochemistry , organic chemistry , enzyme , catalysis , materials science , structural engineering , fracture (geology) , engineering , composite material
This investigation examined the aromatic ring cleavage of β‐ O ‐4 lignin substructure model compounds by lignin peroxidase of Phanerochaete chrysosporium . Based on tracer experiments using H 2 18 O and 18 O 2 , mechanisms of the aromatic ring cleavage of the β‐ O ‐4 lignin models were proposed. The mechanisms involve one‐electron oxidation of the β‐ O ‐4 lignin models by the enzyme followed by attack of nucleophiles and radical coupling with O 2 .