Applied Microbiology and Biotechnology

, Volume 72, Issue 4, pp 705–712 | Cite as

Cloning of β-1,3-1,4-glucanase gene from Bacillus licheniformis EGW039 (CGMCC 0635) and its expression in Escherichia coli BL21 (DE3)

  • Da Teng
  • Jian-hua WangEmail author
  • Ying Fan
  • Ya-lin Yang
  • Zi-gang Tian
  • Jin Luo
  • Guan-pin Yang
  • Fan Zhang
Biotechnologically Relevant Enzymes and Proteins


β-1,3-1,4-Glucanase has been applied in the brewing and animal feed additive industry. It can effectively improve digestibility of barley-based diets and reduce enteritis. It also reduces viscosity during mashing for high-quality brewers malt. The aim of this work is to clone β-1,3-1,4-glucanase-encoding gene and express it heterogeneously. The gene was amplified by polymerase chain reaction using Bacillus licheniformis genomic DNA as the template and ligated into the expression vector pET28a. The recombinant vector was transformed into Escherichia coli. The estimated molecular weight of the recombinant enzyme with a six-His tag at the N terminus was about 28 kDa, and its activities in cell lysate supernatant were 1,286 and 986 U ml−1 for 1% (w/v) barley β-glucan and 1% (w/v) lichenan, respectively. Accordingly, the specific activities were 2,479 and 1,906 U mg−1 for these two substrates. The expression level of recombinant β-1,3-1,4-glucanase was about 60.9% of the total protein and about 12.5% of the total soluble protein in crude cell lysate supernatant. Acidity and temperature optimal for this recombinant enzyme was pH 5.6 and 40°C, respectively.


Glycosidic Bond Recombinant Enzyme Bacillus Licheniformis Glucanase Activity Glucanase Gene 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This project is funded by the Chinese National Hi-Tech R&D Program (Chinese 863 Program No. 2001 AA 246041 and 2004 AA 246040).


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Da Teng
    • 1
  • Jian-hua Wang
    • 1
    Email author
  • Ying Fan
    • 1
  • Ya-lin Yang
    • 1
  • Zi-gang Tian
    • 1
  • Jin Luo
    • 1
  • Guan-pin Yang
    • 2
  • Fan Zhang
    • 1
  1. 1.Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural SciencesBeijingPeople’s Republic of China
  2. 2.College of Marine Life ScienceOcean University of ChinaShandongPeople’s Republic of China

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