Siderophores as natural mediators in laccse-aided degradation of lignin

Marja-Leena Niku-Paavola, H. Anke, K. Poppius-Levlin, Liisa Viikari

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

Abstract

Hydroxamate siderophores, microbial metal chelating agents have structural similarities with synthetic mediators succesfully used in laccase-aided delignification processes. The iron-free forms of fungal hydroxamate siderophores; desferrioxamine B, desferritriacetylfusigen and nocardamin, were shown to have mediator characteristics in laccase catalyzed oxidative reactions. Ferricrosin, an iron-containing form of siderophore, did not react with laccase. It was concluded that the iron-binding structures, free hydroxyl groups in the hydroxamate siderophores, are the targets for laccase. GPC, 1H NMR and 13C NMR analysis indicated degradation and modification of siderophores during oxidation by laccase. The reaction mechanism differs from the corresponding reactions of synthetic mediators. When compared on molar basis, the ability of the oxidized siderophore to degrade lignin was better than that obtained by the synthetic mediator 1 hydroxybenzotriazole (HBT), due to the higher number of N-OH-groups in the siderophore molecule. The role of siderophores as natural mediators in delignification and as models for mediators is thus worth of further evaluation.
Original languageEnglish
Title of host publicationApplications of Enzymes to Lignocellulosics
PublisherAmerican Chemical Society
Chapter11
Pages176-190
ISBN (Print)0-8412-3831-6
DOIs
Publication statusPublished - 2003
MoE publication typeD2 Article in professional manuals or guides or professional information systems or text book material
Event223rd ACS National Meeting - Orlando, United States
Duration: 7 Apr 200211 Apr 2002

Publication series

NameACS Symposium Series
PublisherACS
Volume855
ISSN (Print)0097-6156
ISSN (Electronic)1947-5918

Conference

Conference223rd ACS National Meeting
CountryUnited States
CityOrlando
Period7/04/0211/04/02

Fingerprint

Siderophores
Lignin
Laccase
Degradation
Delignification
Iron
Nuclear magnetic resonance
Deferoxamine
Chelating Agents
Hydroxyl Radical
Oxidation
Molecules

Cite this

Niku-Paavola, M-L., Anke, H., Poppius-Levlin, K., & Viikari, L. (2003). Siderophores as natural mediators in laccse-aided degradation of lignin. In Applications of Enzymes to Lignocellulosics (pp. 176-190). American Chemical Society. ACS Symposium Series, Vol.. 855 https://doi.org/10.1021/bk-2003-0855.ch011
Niku-Paavola, Marja-Leena ; Anke, H. ; Poppius-Levlin, K. ; Viikari, Liisa. / Siderophores as natural mediators in laccse-aided degradation of lignin. Applications of Enzymes to Lignocellulosics. American Chemical Society, 2003. pp. 176-190 (ACS Symposium Series, Vol. 855).
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Niku-Paavola, M-L, Anke, H, Poppius-Levlin, K & Viikari, L 2003, Siderophores as natural mediators in laccse-aided degradation of lignin. in Applications of Enzymes to Lignocellulosics. American Chemical Society, ACS Symposium Series, vol. 855, pp. 176-190, 223rd ACS National Meeting, Orlando, United States, 7/04/02. https://doi.org/10.1021/bk-2003-0855.ch011

Siderophores as natural mediators in laccse-aided degradation of lignin. / Niku-Paavola, Marja-Leena; Anke, H.; Poppius-Levlin, K.; Viikari, Liisa.

Applications of Enzymes to Lignocellulosics. American Chemical Society, 2003. p. 176-190 (ACS Symposium Series, Vol. 855).

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

TY - CHAP

T1 - Siderophores as natural mediators in laccse-aided degradation of lignin

AU - Niku-Paavola, Marja-Leena

AU - Anke, H.

AU - Poppius-Levlin, K.

AU - Viikari, Liisa

PY - 2003

Y1 - 2003

N2 - Hydroxamate siderophores, microbial metal chelating agents have structural similarities with synthetic mediators succesfully used in laccase-aided delignification processes. The iron-free forms of fungal hydroxamate siderophores; desferrioxamine B, desferritriacetylfusigen and nocardamin, were shown to have mediator characteristics in laccase catalyzed oxidative reactions. Ferricrosin, an iron-containing form of siderophore, did not react with laccase. It was concluded that the iron-binding structures, free hydroxyl groups in the hydroxamate siderophores, are the targets for laccase. GPC, 1H NMR and 13C NMR analysis indicated degradation and modification of siderophores during oxidation by laccase. The reaction mechanism differs from the corresponding reactions of synthetic mediators. When compared on molar basis, the ability of the oxidized siderophore to degrade lignin was better than that obtained by the synthetic mediator 1 hydroxybenzotriazole (HBT), due to the higher number of N-OH-groups in the siderophore molecule. The role of siderophores as natural mediators in delignification and as models for mediators is thus worth of further evaluation.

AB - Hydroxamate siderophores, microbial metal chelating agents have structural similarities with synthetic mediators succesfully used in laccase-aided delignification processes. The iron-free forms of fungal hydroxamate siderophores; desferrioxamine B, desferritriacetylfusigen and nocardamin, were shown to have mediator characteristics in laccase catalyzed oxidative reactions. Ferricrosin, an iron-containing form of siderophore, did not react with laccase. It was concluded that the iron-binding structures, free hydroxyl groups in the hydroxamate siderophores, are the targets for laccase. GPC, 1H NMR and 13C NMR analysis indicated degradation and modification of siderophores during oxidation by laccase. The reaction mechanism differs from the corresponding reactions of synthetic mediators. When compared on molar basis, the ability of the oxidized siderophore to degrade lignin was better than that obtained by the synthetic mediator 1 hydroxybenzotriazole (HBT), due to the higher number of N-OH-groups in the siderophore molecule. The role of siderophores as natural mediators in delignification and as models for mediators is thus worth of further evaluation.

U2 - 10.1021/bk-2003-0855.ch011

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SN - 0-8412-3831-6

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Niku-Paavola M-L, Anke H, Poppius-Levlin K, Viikari L. Siderophores as natural mediators in laccse-aided degradation of lignin. In Applications of Enzymes to Lignocellulosics. American Chemical Society. 2003. p. 176-190. (ACS Symposium Series, Vol. 855). https://doi.org/10.1021/bk-2003-0855.ch011