Characterization of ecologically diverse viruses infecting co-occurring strains of cosmopolitan hyperhalophilic Bacteroidetes

The ISME Journal
Judith VillamorJosefa Antón

Abstract

Hypersaline environments close to saturation harbor the highest density of virus-like particles reported for aquatic systems as well as low microbial diversity. Thus, they offer unique settings for studying virus-host interactions in nature. However, no viruses have been isolated so far infecting the two most abundant inhabitants of these systems (that is, the euryarchaeon Haloquadratum walsbyi and the bacteroidetes Salinibacter ruber). Here, using three different co-occurring strains, we have isolated eight viruses infecting the ubiquitous S. ruber that constitute three new different genera (named as 'Holosalinivirus', 'Kryptosalinivirus' and 'Kairosalinivirus') according to their genomic traits, different host range, virus-host interaction capabilities and abundances in natural systems worldwide. Furthermore, to get a more complete and comprehensive view of S. ruber virus assemblages in nature, a microcosm experiment was set with a mixture of S. ruber strains challenged with a brine virus concentrate, and changes of viral populations were monitored by viral metagenomics. Only viruses closely related to kairosalinivirus (strictly lytic and wide host range) were enriched, despite their low initial abundance in the natural sampl...Continue Reading

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Citations

Mar 29, 2019·Environmental Microbiology·Carolina M MizunoHanna M Oksanen
Jan 24, 2019·MBio·Pedro González-TorresToni Gabaldón
Feb 7, 2019·Environmental Microbiology·María Dolores Ramos-BarberoRicardo Amils
Aug 4, 2018·Frontiers in Microbiology·Pedro González-Torres, Toni Gabaldón
Sep 26, 2020·Nucleic Acids Research·Darius KazlauskasČeslovas Venclovas
Jun 11, 2021·Environmental Microbiology·Mª Dolores Ramos-BarberoJosefa Antón

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Datasets Mentioned

BETA
PRJNA81851
MF580955
MF580962
PRJNA396958
MF629150

Methods Mentioned

BETA
electrophoresis
454 sequencing
flow filtration
transmission electron microscopy

Software Mentioned

Easyfig Phyton
join
eatools
MUSCLE
Geneious Tree Builder
JSpecies
IDBA assembler
PRINSEQ
blast
BLASTp

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