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Title: Viral dark matter and virus–host interactions resolved from publicly available microbial genomes

The ecological importance of viruses is now widely recognized, yet our limited knowledge of viral sequence space and virus–host interactions precludes accurate prediction of their roles and impacts. In this study, we mined publicly available bacterial and archaeal genomic data sets to identify 12,498 high-confidence viral genomes linked to their microbial hosts. These data augment public data sets 10-fold, provide first viral sequences for 13 new bacterial phyla including ecologically abundant phyla, and help taxonomically identify 7–38% of ‘unknown’ sequence space in viromes. Genome- and network-based classification was largely consistent with accepted viral taxonomy and suggested that (i) 264 new viral genera were identified (doubling known genera) and (ii) cross-taxon genomic recombination is limited. Further analyses provided empirical data on extrachromosomal prophages and coinfection prevalences, as well as evaluation of in silico virus–host linkage predictions. Together these findings illustrate the value of mining viral signal from microbial genomes.
 [1] ;  [2] ;  [3] ;  [1]
  1. Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, United States
  2. Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada, Graduate Program in Bioinformatics, University of British Columbia, Vancouver, Canada
  3. U.S Department of Energy Joint Genome Institute, Walnut Creek, United States
Publication Date:
Grant/Contract Number:
Joint Genome Institute (DE-AC02-05CH11231)
Published Article
Journal Name:
Additional Journal Information:
Journal Volume: 4; Related Information: CHORUS Timestamp: 2017-10-18 18:39:35; Journal ID: ISSN 2050-084X
eLife Sciences Publications, Ltd.
Sponsoring Org:
Country of Publication:
United States
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1209987