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Lysogeny in the oceans: Lessons from cultivated model systems and a reanalysis of its prevalence

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ENVIRONMENTAL MICROBIOLOGY
卷 22, 期 12, 页码 4919-4933

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WILEY
DOI: 10.1111/1462-2920.15233

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  1. NSF [DBI-0735191, DBI-1265383]

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In the oceans, viruses that infect bacteria (phages) influence a variety of microbially mediated processes that drive global biogeochemical cycles. The nature of their influence is dependent upon infection mode, be it lytic or lysogenic. Temperate phages are predicted to be prevalent in marine systems where they are expected to execute both types of infection modes. Understanding the range and outcomes of temperate phage-host interactions is fundamental for evaluating their ecological impact. Here, we (i) review phage-mediated rewiring of host metabolism, with a focus on marine systems, (ii) consider the range and nature of temperate phage-host interactions, and (iii) draw on studies of cultivated model systems to examine the consequences of lysogeny among several dominant marine bacterial lineages. We also readdress the prevalence of lysogeny among marine bacteria by probing a collection of 1239 publicly available bacterial genomes, representing cultured and uncultivated strains, for evidence of complete prophages. Our conservative analysis, anticipated to underestimate true prevalence, predicts 18% of the genomes examined contain at least one prophage, the majority (97%) were found within genomes of cultured isolates. These results highlight the need for cultivation of additional model systems to better capture the diversity of temperate phage-host interactions in the oceans.

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