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JMT-1: a novel, spherical lytic halotolerant phage isolated from Yuncheng saline lake.
Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology] 2018 April 4
This work described a novel halotolerant phage, JMT-1, with a spherical morphology. JMT-1, which was isolated from a hypersaline lake, could produce clear plaques on Chromohalobacter sp. LY7-3. The purified virions are spherical, have no visible tail, and are about 30-50nm in diameter. JMT-1 has a wide host range, and this study showed that the phage can infect at least five halophilic bacteria. The proteins of JMT-1 were analyzed using sodium dodecyl sulfate polyacrylamide gel electrophoresis, and six proteins were detected. Results show that JMT-1 is a bacteriophage with a linear double-stranded DNA. Meanwhile, the genome is approximately 23kb in length and is sensitive to the restriction endonucleases Bam I, EcoR I, Hind III and Kpa I. JMT-1 has a high titer, approaching 1.5×109 pfu/mL after dilution to 10-6 pfu/mL. The phage is also sensitive to chloroform but not to temperature, pH, and lowered salt concentration. JMT-1 is a spherical lytic halotolerant phage with a wide host range and has the tolerance to specific extreme environments. These data could provide references for studying phage resources in extreme environments and would also provide the useful methods for isolation and identification of other valuable phage in the salt lake environment.
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