Role of laccase in lignin degradation by white-rot fungi

Hong Duk Youn, Yung Chil Hah, Sa Ouk Kang

Research output: Contribution to journalShort surveypeer-review

134 Scopus citations

Abstract

Laccase is commonly found in white-rot fungi and catalyses the abstraction of one electron from the phenolic hydroxyl group to polymerize or depolymerize lignin model compounds. Laccase degrades both β-1 and β-O-4 dimers via Cα-Cβ cleavage, Cα oxidation and alkyl-aryl cleavage. Also, aromatic ring cleavage may be detected following the action of laccase. Laccase can also oxidize non-phenolic compounds when primary mediators, such as 2,2′-azinobis(3-ethylbenzthiazoline-6-sulfonate), are co-present. Laccase produces Mn(III) chelates which allow wood-decaying enzymes to penetrate wood cell walls. Laccase is considered to be capable of degrading lignin together with lignin peroxidase and manganese peroxidase.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
JournalFEMS Microbiology Letters
Volume132
Issue number3
DOIs
StatePublished - 15 Oct 1995

Bibliographical note

Funding Information:
Works from our laboratory described in this article were supportedb y the Korea Science and Engineering Foundation research grant for SRC (Re- search Center for Molecular Microbiology, Seoul National University).

Keywords

  • Laccase
  • Lignin degradation
  • Phenoxy radical
  • White-rot fungi

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