Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Evidence That Temporally Alternative Expression of the Vibrio vulnificus Elastase Prevents Proteolytic Inactivation of Hemolysin

  • Rhee, Jee-Eun (Department of Food Science and Technology, Chonnam National University) ;
  • Lee, Jeong-Hyun (Department of Food Science and Technology, Chonnam National University) ;
  • Jeong, Hye-Sook (Department of Food Science and Technology, Chonnam National University) ;
  • Park, U-Ryung (Department of Molecular Biotechnology, Institute of Biotechnology, Chonnam National University) ;
  • Lee, Dong-Ha (Division of Food Microbiology, Korea Food and Drug Administration) ;
  • Woo, Gun-Jo (Division of Food Microbiology, Korea Food and Drug Administration) ;
  • Miyoshi, Shin-Ichi (Faculty of Pharmaceutical Sciences, Okayama University) ;
  • Choi, Sang-Ho (Department of Food Science and Technology, Chonnam National University, Department of Molecular Biotechnology, Institute of Biotechnology, Chonnam National University)
  • Published : 2003.12.01
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Abstract

Numerous secreted and cell-associated virulence factors have been proposed to account for the fulminating and destructive nature of Vibrio vulnificus infections. Among the putative virulence factors are an elastase, elastolytic protease, and a cytolytic hemolysin. Effects of the elastase on the hemolysin were assessed by evaluating changes of hemolytic activities either in the presence or absence of the protease. Although hemolytic activity in the culture supernatant was lowered by the purified elastase added in vitro, the cellular level of hemolytic activity was unaffected by the mutation of vvpE encoding the elastase. Growth kinetic studies revealed that hemolysin reached its maximum level in the exponential phase of growth, and the elastase appeared at the onset of the stationary phase. These results have provided insight into the regulation of virulence factors: temporally coordinate regulation of virulence factors is essential for the overall success of the pathogen during pathogenesis.

Keywords

References

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