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The genome sequence of Escherichia coli tailed phage D6 and the diversity of Enterobacteriales circular plasmid prophages.


ABSTRACT: The temperate Escherichia coli bacteriophage D6 can exist as a circular plasmid prophage, and we report here its 91,159bp complete genome sequence. It is a distant relative of the well-studied phage P1, but it is sufficiently different that it typifies a previously undescribed tailed phage type or cluster. Examination of the database of bacterial genome sequences revealed that phage P1 and D6 prophage plasmids are common in the Enterobacteriales, and in addition, previously described Salmonella phage SSU5 represents a different type of temperate tailed phage with a circular plasmid prophage that is also very common in this host order. This analysis also discovered additional divergent clusters of putative circular plasmid prophages within the two larger P1 and SSU5 groups (superclusters) that inhabit the Enterobacteriales as well as bacteria in several other orders in the Gamma-proteobacteria class. Very few of these sequences are annotated as putative prophages.

SUBMITTER: Gilcrease EB 

PROVIDER: S-EPMC5800970 | BioStudies | 2018-01-01

REPOSITORIES: biostudies

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