Isolation of lysozyme producing bacteria capable of solubilizing microbial cells

미생물 용해가 가능한 Iysozyme 분비 균주의 분리 및 특성

  • Guo, Pengfei (Department of Environmental Engineering and Biotechnology, Myongji University) ;
  • Seo, Sun-Keun (Department of Environmental Engineering and Biotechnology, Myongji University) ;
  • Zhang, Lei (Department of Environmental Engineering and Biotechnology, Myongji University) ;
  • Kim, Hyo-Sang (GS E&C Research Institute) ;
  • Oh, Young-Khee (GS E&C Research Institute) ;
  • Jahng, Deok-Jin (Department of Environmental Engineering and Biotechnology, Myongji University)
  • Published : 2008.06.30

Abstract

Lysozyme-producing microorganisms were isolated to obtain bacteria which can efficiently solubilize microbial cells. Cells of normal and chloroform-treated Escherichia coli and Micrococcus Iysodeikticus were used as model substrates to isolate lysozyme-producing microorganisms and investigate the efficiency of cell lysis. The culture supernatant of the isolate New1 (98% similarity of 16S rDNA sequence with Thermomonas haemolytica) showed different lytic characteristics for different substrates. Thermal treatment (autoclave) of substrate cells showed a significant effect on cell solubilization by culture supernatant of the New1. For autoclaved substrate cells, E. coli, M. Iysodeikticus and chloroform-treated E. coli were solubilized by 58.7%, 49.4% and 79.1%, respectively, in the culture supernatant of New1. The lytic activity of New1 was mainly caused by lysozyme produced by the isolate. It was also showed that New1 exhibited high protease activity and a little cellulase activity.

Keywords

References

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