Journal
TRANSGENIC RESEARCH
Volume 26, Issue 6, Pages 753-761Publisher
SPRINGER
DOI: 10.1007/s11248-017-0043-0
Keywords
Laccase; Cellulose-binding module; Saccharification; Cell wall composition; Lignocellulosic biomass
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Funding
- Cooperative Research Grant of the Plant Transgenic Design Initiative Program, Gene Research Center, University of Tsukuba
- Hirosaki University Grant for Exploratory Research by Young Scientists
- Grants-in-Aid for Scientific Research [16K14890] Funding Source: KAKEN
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Delignification is effective for improving the saccharification efficiency of lignocellulosic biomass materials. We previously identified that the expression of a fungal laccase (Lac) fused with a bacterial cellulose-binding module domain (CBD) improved the enzymatic saccharification efficiency of rice plants. In this work, to evaluate the ability of the Lac-CBD fused chimeric enzyme to improve saccharification efficiency in a dicot plant, we introduced the chimeric gene into a dicot model plant, Arabidopsis thaliana. Transgenic plants expressing the Lac-CBD chimeric gene showed normal morphology and growth, and showed a significant increase of enzymatic saccharification efficiency compared to control plants. The transgenic plants with the largest improvement of enzymatic saccharification efficiency also showed an increase of crystalline cellulose in their cell wall fractions. These results indicated that expression of the Lac-CBD chimeric protein in dicotyledonous plants improved the enzymatic saccharification of plant biomass by increasing the crystallinity of cellulose in the cell wall.
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