Isolation and characterization of glacier VMY22, a novel lytic cold-active bacteriophage of Bacillus cereus

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• 作者：Xiuling Ji ; Chunjing Zhang ; Yuan Fang ; Qi Zhang ; Lianbing Lin…
• 关键词：Bacillus cereus ; characterization ; cold ; active phage ; lytic ; Podoviridae
• 刊名：Virologica Sinica
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：30
• 期：1
• 页码：52-58
• 全文大小：797 KB
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• 作者单位：Xiuling Ji (1)
  Chunjing Zhang (1)
  Yuan Fang (1)
  Qi Zhang (1)
  Lianbing Lin (1)
  Bing Tang (2)
  Yunlin Wei (1)
  
  1. Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, China
  2. Faculty of Life Science, Wuhan University, Wuhan, 430072, China
  
• 刊物主题：Virology; Medical Microbiology; Oncology; Biochemistry, general; Microbiology; Microbial Genetics and Genomics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1995-820X

文摘

As a unique ecological system with low temperature and low nutrient levels, glaciers are considered a “living fossil-for the research of evolution. In this work, a lytic cold-active bacteriophage designated VMY22 against Bacillus cereus MYB41-22 was isolated from Mingyong Glacier in China, and its characteristics were studied. Electron microscopy revealed that VMY22 has an icosahedral head (59.2 nm in length, 31.9 nm in width) and a tail (43.2 nm in length). Bacteriophage VMY22 was classified as a Podoviridae with an approximate genome size of 18 to 20 kb. A one-step growth curve revealed that the latent and the burst periods were 70 and 70 min, respectively, with an average burst size of 78 bacteriophage particles per infected cell. The pH and thermal stability of bacteriophage VMY22 were also investigated. The maximum stability of the bacteriophage was observed to be at pH 8.0 and it was comparatively stable at pH 5.0-.0. As VMY22 is a cold-active bacteriophage with low production temperature, its characterization and the relationship between MYB41-22 and Bacillus cereus bacteriophage deserve further study.