Abstract
We isolated a novel lytic phage of Ralstonia solanacearum, GP4. The GP4 phage has a latent period of ~ 2 h at its optimal multiplicity of infection and is stable at temperatures ranging from 40–70 °C. GP4 lysed 16 strains of R. solanacearum belonging to phylotype IV. High-throughput sequencing revealed that GP4 has a linear dsDNA genome that consists of 61,129 bp, contains 83 open reading frames, and encodes a tRNA for cysteine. The GP4 genome has low similarity to other phage sequences in the GenBank database. Phylogenetic analysis indicated that GP4 can be taxonomically classified as a member of the Bcep22-like subfamily of the family Podoviridae.
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Acknowledgements
Yigang Tong, Hui Liu, Taoxing Shi and Zhiqiang Mi conceived and designed the experiments and critically evaluated the manuscript. Hang Fan conducted sequence analyses. Ronghuan Wang conducted sequence analyses, biological characterization experiments and wrote the manuscript. Yu Cong isolated and identified the phage and conducted biological characterization experiments. All authors read and approved the final manuscript.
Funding
This research was supported by a grant from the National Key Research and Development Program of China (2015AA020108, 2016YFC1202705, AWS16J020 and AWS15J006), the National Natural Science Foundation of China (81572045, 81672001, and 81621005), and the State Key Laboratory of Pathogen and Biosecurity (SKLPBS1518).
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Wang, R., Cong, Y., Mi, Z. et al. Characterization and complete genome sequence analysis of phage GP4, a novel lytic Bcep22-like podovirus. Arch Virol 164, 2339–2343 (2019). https://doi.org/10.1007/s00705-019-04309-7
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DOI: https://doi.org/10.1007/s00705-019-04309-7