Genome sequence and analysis of a broad-host range lytic bacteriophage that infects the Bacillus cereus group

Virology Journal

Andrew M Kropinski³  Erika J Lingohr¹  Andre Villegas¹  Yi-Min She⁵  Mansel W Griffiths²  Tarek F El-Arabi⁴ 

[1] Public Health Agency of Canada, Laboratory for Foodborne Zoonoses, Guelph, ON, N1G 3W4, Canada;Department of Food Science, University of Guelph, Guelph, ON, N1G 2W1, Canada;Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada;Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON, N1G 2W1, Canada;Centre for Vaccine Evaluation, Biologics and Genetic Therapies Directorate, Health Canada, Ottawa, ON, K1A 0K9, Canada

关键词: tRNAs;    Proteome;    Genome;    Host range;    Myoviridae;    Bacteriophage;    Bacillus cereus;   

Others  :  1151836
DOI  :  10.1186/1743-422X-10-48

 received in 2012-08-13, accepted in 2013-01-08,  发布年份 2013

【 摘 要 】

Background

Comparatively little information is available on members of the Myoviridae infecting low G+C content, Gram-positive host bacteria of the family Firmicutes. While numerous Bacillus phages have been isolated up till now only very few Bacillus cereus phages have been characterized in detail.

Results

Here we present data on the large, virulent, broad-host-range B. cereus phage vB_BceM_Bc431v3 (Bc431v3). Bc431v3 features a 158,618 bp dsDNA genome, encompassing 239 putative open reading frames (ORFs) and, 20 tRNA genes encoding 17 different amino acids. Since pulsed-field gel electrophoresis indicated that the genome of this phage has a mass of 155-158 kb Bc431v3 DNA appears not to contain long terminal repeats that are found in the genome of Bacillus phage SPO1.

Conclusions

Bc431v3 displays significant sequence similarity, at the protein level, to B. cereus phage BCP78, Listeria phage A511 and Enterococcus phage ØEF24C and other morphologically related phages infecting Firmicutes such as Staphylococcus phage K and Lactobacillus phage LP65. Based on these data we suggest that Bc431v3 should be included as a member of the Spounavirinae; however, because of all the diverse taxonomical information has been addressed recently, it is difficult to determine the genus. The Bc431v3 phage contains some highly unusual genes such as gp143 encoding putative tRNA^His guanylyltransferase. In addition, it carries some genes that appear to be related to the host sporulation regulators. These are: gp098, which encodes a putative segregation protein related to FstK/SpoIIIE DNA transporters; gp105, a putative segregation protein; gp108, RNA polymerase sigma factor F/B; and, gp109 encoding RNA polymerase sigma factor G.

【 授权许可】

   
2013 El-Arabi et al; licensee BioMed Central Ltd.

【 图 表 】

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