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Novel Abundant Oceanic Viruses of Uncultured Marine Group II Euryarchaeota.


ABSTRACT: Marine group II Euryarchaeota (MG-II) are among the most abundant microbes in oceanic surface waters [1-4]. So far, however, representatives of MG-II have not been cultivated, and no viruses infecting these organisms have been described. Here, we present complete genomes for three distinct groups of viruses assembled from metagenomic sequence datasets highly enriched for MG-II. These novel viruses, which we denote magroviruses, possess double-stranded DNA genomes of 65 to 100 kilobases in size that encode a structural module characteristic of head-tailed viruses and, unusually for archaeal and bacterial viruses, a nearly complete replication apparatus of apparent archaeal origin. The newly identified magroviruses are widespread and abundant and therefore are likely to be major ecological agents.

SUBMITTER: Philosof A 

PROVIDER: S-EPMC5434244 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature

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Novel Abundant Oceanic Viruses of Uncultured Marine Group II Euryarchaeota.

Philosof Alon A   Yutin Natalya N   Flores-Uribe José J   Sharon Itai I   Koonin Eugene V EV   Béjà Oded O  

Current biology : CB 20170427 9


Marine group II Euryarchaeota (MG-II) are among the most abundant microbes in oceanic surface waters [1-4]. So far, however, representatives of MG-II have not been cultivated, and no viruses infecting these organisms have been described. Here, we present complete genomes for three distinct groups of viruses assembled from metagenomic sequence datasets highly enriched for MG-II. These novel viruses, which we denote magroviruses, possess double-stranded DNA genomes of 65 to 100 kilobases in size t  ...[more]

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