Biotechnology and Bioprocess Engineering

, Volume 19, Issue 4, pp 605–612 | Cite as

Molecular cloning and characterization of a novel glucansucrase from Leuconostoc mesenteroides subsp. mesenteroides LM34

  • Hee-Kyoung Kang
  • Thi Thanh Hanh Nguyen
  • Ha-Na Jeong
  • Min-Eon Park
  • Doman Kim
Research Paper


Leuconostoc mesenteroides LM34 was isolated from kimchi, a traditional fermented Korean food. L. mesenteroides LM34 produced extracellular glucansucrase (DSRLM34), which is responsible for the synthesis of soluble glucan using sucrose. The DSRLM34 gene consists of a 4,503 bp open reading frame (ORF) and encodes an enzyme of 1,500 amino acids with an apparent molecular mass of 165 kDa. The deduced amino-acid sequence showed the highest amino-acid sequence identity (98%) to that of glucansucrase of Lactobacillus lactis. The gene was over-expressed in Escherichia coli strain and the recombinant enzyme (rDSRLM34) was purified. Both DSRLM34 and rDSRLM34 synthesized glucan mainly containing α-1, 6 glucosidic linkage and branched α-1, 3 glucosidic linkages. The enzyme exhibited optimum activity at 30°C and pH 5.0. DSRLM34 has promising potential as a thickening agent in sucrose-supplemented milk.


Leuconostoc mesenteroides glucansucrase dextran kimchi 


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Copyright information

© The Korean Society for Biotechnology and Bioengineering and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Hee-Kyoung Kang
    • 1
  • Thi Thanh Hanh Nguyen
    • 2
  • Ha-Na Jeong
    • 2
  • Min-Eon Park
    • 2
  • Doman Kim
    • 2
    • 3
  1. 1.Department of Biomedical ScienceChosun UniversityGwangjuKorea
  2. 2.Institutes of Green Bio Science & TechnologySeoul National UniversityPyeongchangKorea
  3. 3.Department of Food and Animal Biotechnology, College of Agriculture and Life ScienceSeoul National UniversitySeoulKorea

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