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.

中文翻译：

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封闭的 Candidatus Odinarchaeum 染色体暴露了 Asgard 古细菌病毒

Asgard 古细菌最近被确定为与真核生物最近的古细菌亲属。他们的生态，尤其是他们的病毒，仍然是个谜。我们通过长程 PCR重新组装并关闭了Candidatus Odinarchaeum yellowstonii LCB_4 的染色体，揭示了靶向病毒重叠群的 CRISPR 间隔区。我们在来自地热环境的各种原核生物的基因组中发现了相关病毒，包括其他 Asgard 古细菌。这些病毒为 Asgard 古细菌的生态学和进化开辟了研究途径。