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Insights into the Dynamics Between Viruses and their Hosts in a Hot Spring Microbial Mat
Authors
Eric Becraft
Stephanie A. Carr
+15 more
Frank A. Corsetti
Mária Džunková
Emiley Eloe-Fadrosh
Natalia Ivanova
Jessica K. Jarett
Hope A. Johnson
Sean P. Jungbluth
Nikos Kyrpides
David Paez-Espino
Simon Roux
Frederik Schulz
John R. Spear
Ramunas Stepanauskas
Christopher B. Trivedi
Tanja Woyke
Publication date
1 January 2020
Publisher
UNA Scholarly Repository
Abstract
© 2020, The Author(s). Our current knowledge of host–virus interactions in biofilms is limited to computational predictions based on laboratory experiments with a small number of cultured bacteria. However, natural biofilms are diverse and chiefly composed of uncultured bacteria and archaea with no viral infection patterns and lifestyle predictions described to date. Herein, we predict the first DNA sequence-based host–virus interactions in a natural biofilm. Using single-cell genomics and metagenomics applied to a hot spring mat of the Cone Pool in Mono County, California, we provide insights into virus–host range, lifestyle and distribution across different mat layers. Thirty-four out of 130 single cells contained at least one viral contig (26%), which, together with the metagenome-assembled genomes, resulted in detection of 59 viruses linked to 34 host species. Analysis of single-cell amplification kinetics revealed a lack of active viral replication on the single-cell level. These findings were further supported by mapping metagenomic reads from different mat layers to the obtained host–virus pairs, which indicated a low copy number of viral genomes compared to their hosts. Lastly, the metagenomic data revealed high layer specificity of viruses, suggesting limited diffusion to other mat layers. Taken together, these observations indicate that in low mobility environments with high microbial abundance, lysogeny is the predominant viral lifestyle, in line with the previously proposed “Piggyback-the-Winner” theory
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Last time updated on 26/11/2020