Abstract
The Roseophages, a group of marine viruses that uniquely infect the Roseobacter clade of bacteria, play a significant role in marine ecosystems. Here we present a complete genomic sequence of an N4 phage ‘vB_DshP-R1’, which infects Dinoroseobacter shibae DFL12, together with its structural and genomic features. vB_DshP-R1 has an ~ 75 nm diameter icosahedral structure and a complete genome of 75,028 bp. This is the first genome sequence of a lytic phage of the genus Dinoroseobacter.Electronic supplementary materialThe online version of this article (doi:10.1186/1944-3277-10-6) contains supplementary material, which is available to authorized users.
Highlights
The Roseobacter clade is representative of the most abundant bacteria in the oceans of the world, typically accounting for up to 25% of all marine microbial communities [1,2,3]
There were 19 CDSs uniquely present in the vB_DshP-R1 genome, including a putative deaminase (ORF60) that was homologous with trimeric dUTP diphosphatases of the Achromobacter phage JWDelta. Combining all these Bacteriophage N4 (N4) phages from different species and distant environments, characteristics of the putative CDSs in these genomes revealed that they were almost consistent in genomic assemblies, including DNA replication, transcriptional regulation, DNA metabolism and structural gene modules (Figure 3)
Conclusions vB_DshP-R1 is the first virus to be identified infecting the sole species of the genus Dinoroseobacter in the Roseobacter clade
Summary
The Roseobacter clade is representative of the most abundant bacteria in the oceans of the world, typically accounting for up to 25% of all marine microbial communities [1,2,3]. We isolated a new N4 phage (named vB_DshP-R1) in 2012 from coastal surface seawater and found that it infected D. shibae DFL12. This vRNAP is a unique feature in N4 phages putatively conducting early transcription of infective processes.
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