Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Bioactive Levan-Type Exopolysaccharide Produced by Pantoea agglomerans ZMR7: Characterization and Optimization for Enhanced Production

  • Al-Qaysi, Safaa A.S. (Department of Biology, College of Science (for Women), University of Baghdad) ;
  • Al-Haideri, Halah (Department of Biology, College of Science (for Women), University of Baghdad) ;
  • Al-Shimmary, Sana M. (Department of Biology, College of Science (for Women), University of Baghdad) ;
  • Abdulhameed, Jasim M. (Anbar Education Directors) ;
  • Alajrawy, Othman I. (Department of Applied Chemistry, College of Applied Science, University of Fallujah) ;
  • Al-Halbosiy, Mohammad M. (Biotechnology Research Center, University of Al- Nahrain) ;
  • Moussa, Tarek A.A. (Department of Botany and Microbiology, Faculty of Science, Cairo University) ;
  • Farahat, Mohamed G. (Department of Botany and Microbiology, Faculty of Science, Cairo University)
  • Received : 2021.01.20
  • Accepted : 2021.03.30
  • Published : 2021.05.28
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Abstract

Levan is an industrially important, functional biopolymer with considerable applications in the food and pharmaceutical fields owing to its safety and biocompatibility. Here, levan-type exopolysaccharide produced by Pantoea agglomerans ZMR7 was purified by cold ethanol precipitation and characterized using TLC, FTIR, 1H, and 13C NMR spectroscopy. The maximum production of levan (28.4 g/l) was achieved when sucrose and ammonium chloride were used as carbon and nitrogen sources, respectively, at 35℃ and an initial pH of 8.0. Some biomedical applications of levan like antitumor, antiparasitic, and antioxidant activities were investigated in vitro. The results revealed the ability of levan at different concentrations to decrease the viability of rhabdomyosarcoma and breast cancer cells compared with untreated cancer cells. Levan appeared also to have high antiparasitic activity against the promastigote of Leishmania tropica. Furthermore, levan had strong DPPH radical scavenging (antioxidant) activity. These findings suggest that levan produced by P. agglomerans ZMR7 can serve as a natural biopolymer candidate for the pharmaceutical and medical fields.

Keywords

References

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