Expression of a fungal laccase fused with a bacterial cellulose-binding module improves the enzymatic saccharification efficiency of lignocellulose biomass in transgenic Arabidopsis thaliana

Ryota Iiyoshi, Taichi Oguchi, Toru Furukawa, Yosuke Iimura, Yukihiro Ito, Tomonori Sonoki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)753-761
Number of pages9
JournalTransgenic Research
Volume26
Issue number6
DOIs
Publication statusPublished - 2017 Dec 1

Keywords

  • Cell wall composition
  • Cellulose-binding module
  • Laccase
  • Lignocellulosic biomass
  • Saccharification

ASJC Scopus subject areas

  • Biotechnology
  • Animal Science and Zoology
  • Agronomy and Crop Science
  • Genetics

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