A closed Candidatus Odinarchaeum chromosome exposes Asgard archaeal viruses

Daniel Tamarit (1, 2) , Eva F. Caceres (3) , Mart Krupovic (4) , Reindert Nijland (1) , Laura Eme (5) , Nicholas P. Robinson (6) , Thijs J. G. Ettema (1)

1 WUR - Wageningen University and Research [Wageningen]
2 SLU - Swedish University of Agricultural Sciences
3 Uppsala Universitet [Uppsala]
4 Virologie des archées - Archaeal Virology
5 ESE - Ecologie Systématique et Evolution
6 Lancaster University

Asgard archaea have recently been identified as the closest archaeal relatives of eukaryotes. Their ecology, and particularly their virome, remain enigmatic. We reassembled and closed the chromosome of Candidatus Odinarchaeum yellowstonii LCB_4, through long-range PCR, revealing CRISPR spacers targeting viral contigs. We found related viruses in the genomes of diverse prokaryotes from geothermal environments, including other Asgard archaea. These viruses open research avenues into the ecology and evolution of Asgard archaea.

Domains: Virology

Daniel Tamarit, Eva F. Caceres, Mart Krupovic, Reindert Nijland, Laura Eme, et al.. A closed Candidatus Odinarchaeum chromosome exposes Asgard archaeal viruses. Nature Microbiology, 2022, 7, pp.948-952. ⟨10.1038/s41564-022-01122-y⟩. ⟨pasteur-03711310⟩