AI Article Synopsis
- Salinivibrios are halophilic bacteria found in high-salt environments, with three new strains closely linked to S. costicola discovered in Socompa Lake, a hypersaline lake in the Andes.
- These new strains showed extreme resistance to arsenic, high salt concentrations, and UV-B radiation, supported by phenotypic testing and genomic analysis.
- The presence of specific resistance genes and adaptations for energy production suggests that these novel Salinivibrios have unique traits that enable them to survive in challenging conditions at Socompa Lake.
Article Abstract
Background: Salinivibrios are moderately halophilic bacteria found in salted meats, brines and hypersaline environments. We obtained three novel conspecific Salinivibrio strains closely related to S. costicola, from Socompa Lake, a high altitude hypersaline Andean lake (approx. 3,570 meters above the sea level).
Results: The three novel Salinivibrio spp. were extremely resistant to arsenic (up to 200 mM HAsO42-), NaCl (up to 15%), and UV-B radiation (19 KJ/m2, corresponding to 240 minutes of exposure) by means of phenotypic tests. Our subsequent draft genome ionsequencing and RAST-based genome annotation revealed the presence of genes related to arsenic, NaCl, and UV radiation resistance. The three novel Salinivibrio genomes also had the xanthorhodopsin gene cluster phylogenetically related to Marinobacter and Spiribacter. The genomic taxonomy analysis, including multilocus sequence analysis, average amino acid identity, and genome-to-genome distance revealed that the three novel strains belong to a new Salinivibrio species.
Conclusions: Arsenic resistance genes, genes involved in DNA repair, resistance to extreme environmental conditions and the possible light-based energy production, may represent important attributes of the novel salinivibrios, allowing these microbes to thrive in the Socompa Lake.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4094778 | PMC |
| http://dx.doi.org/10.1186/1471-2164-15-473 | DOI Listing |
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