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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Moilanen, Ulla Kellock, Miriam Galkin, Sari Viikari, Liisa |
| Description | Country affiliation: Finland Author Affiliation: Moilanen U ( Department of Food and Environmental Sciences, PO Box 27, 00014 University of Helsinki, Finland. ulla.moilanen@helsinki.fi) |
| Abstract | The efficient use of cellulases in the hydrolysis of pretreated lignocellulosic biomass is limited due to the presence of lignin. Lignin is known to bind hydrolytic enzymes nonspecifically, thereby reducing their action on carbohydrate substrates. The composition and location of residual lignin therefore seem to be important for optimizing the enzymatic hydrolysis of lignocellulosic substrates. The use of lignin-modifying enzymes such as laccase may have potential in the modification or partial removal of lignin from the biomass. In this study, the effect of lignin modification by laccase on the hydrolysis of pretreated spruce (Picea abies) and giant reed (Arundo donax) was evaluated. The substrates were first treated with laccase and then hydrolyzed with commercial cellulases. Laccase modification improved the hydrolysis yield of spruce by 12%, but surprisingly had an adverse effect on giant reed, reducing the hydrolysis yield by 17%. The binding properties of cellulases on the untreated and laccase-treated lignins were further studied using isolated lignins. The laccase treatment reduced the binding of enzymes on modified spruce lignin, whereas with giant reed, the amount of bound proteins increased after laccase treatment. Further understanding of the reactions of laccase on lignin will help to control the unspecific-binding of cellulases on lignocellulosic substrates. |
| File Format | HTM / HTML |
| ISSN | 01410229 |
| Issue Number | 6-7 |
| Volume Number | 49 |
| e-ISSN | 18790909 |
| Journal | Enzyme and Microbial Technology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-12-10 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Microbiology Discipline Biochemistry Discipline Biotechnology Laccase Metabolism Lignin Biofuels Biomass Cellulases Ethanol Hydrolysis Kinetics Chemistry Phenols Picea Poaceae Substrate Specificity Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biochemistry Bioengineering Applied Microbiology and Biotechnology Biotechnology |
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