Expansion of the global RNA virome reveals diverse clades of bacteriophages

Uri Neri, Yuri I. Wolf, Simon Roux, Antonio Pedro Camargo, Benjamin Lee, Darius Kazlauskas, I. Min Chen, Natalia Ivanova, Lisa Zeigler Allen, David Paez-Espino, Donald A. Bryant, Devaki Bhaya, RNA Virus Discovery Consortium, Mart Krupovic, Valerian V. Dolja, Nikos C. Kyrpides, Eugene V. Koonin, Uri Gophna

Research output: Contribution to journalArticleResearchpeer-review

121 Citations (Scopus)

Abstract

High-throughput RNA sequencing offers broad opportunities to explore the Earth RNA virome. Mining 5,150 diverse metatranscriptomes uncovered >2.5 million RNA virus contigs. Analysis of >330,000 RNA-dependent RNA polymerases (RdRPs) shows that this expansion corresponds to a 5-fold increase of the known RNA virus diversity. Gene content analysis revealed multiple protein domains previously not found in RNA viruses and implicated in virus-host interactions. Extended RdRP phylogeny supports the monophyly of the five established phyla and reveals two putative additional bacteriophage phyla and numerous putative additional classes and orders. The dramatically expanded phylum Lenarviricota, consisting of bacterial and related eukaryotic viruses, now accounts for a third of the RNA virome. Identification of CRISPR spacer matches and bacteriolytic proteins suggests that subsets of picobirnaviruses and partitiviruses, previously associated with eukaryotes, infect prokaryotic hosts.

Original languageEnglish
Pages (from-to)4023-4037.e18
Number of pages34
JournalCell
Volume185
Issue number21
DOIs
Publication statusPublished - 13 Oct 2022
Externally publishedYes

Keywords

  • Bactriophage
  • Functional protein annotation
  • Metatranscriptomics
  • RNA dependent RNA polymerase
  • RNA Virus
  • Viral Ecology
  • viral phylogeny
  • Virus
  • Virus - Host prediction

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