ArticleProceedings of the National Academy of Sciences of the United States of America2013
High level of intergenera gene exchange shapes the evolution of haloarchaea in an isolated Antarctic lake.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers.
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56 citing papers in PubMed.
- Article
- Distribution and Implications of Haloarchaeal Plasmids Disseminated in Self-Encoded Plasmid Vesicles.Microorganisms · 2023Article
- Deciphering the Role of WWTPs in Cold Environments as Hotspots for the Dissemination of Antibiotic Resistance Genes.Microbial ecology · 2023Article
- Viral community composition of hypersaline lakes.Virus evolution · 2023Article
- Characterization of an archaeal virus-host system reveals massive genomic rearrangements in a laboratory strain.Frontiers in microbiology · 2023Article
- Population structure of an Antarctic aquatic cyanobacterium.Microbiome · 2022Article
- Discovery of archaeal fusexins homologous to eukaryotic HAP2/GCS1 gamete fusion proteins.Nature communications · 2022Article
- Archaeal bundling pili ofProceedings of the National Academy of Sciences of the United States of America · 2022Article
- Microbial diversity in extreme environments.Nature reviews. Microbiology · 2022Review
- Remarkably coherent population structure for a dominant Antarctic Chlorobium species.Microbiome · 2021Article
- Cultivation of halophilic archaea (classMarine life science & technology · 2021Review
- Natural bacterial isolates as an inexhaustible source of new bacteriocins.Applied microbiology and biotechnology · 2021Review
- Hikarchaeia demonstrate an intermediate stage in the methanogen-to-halophile transition.Nature communications · 2020Article
- Influence of the polar light cycle on seasonal dynamics of an Antarctic lake microbial community.Microbiome · 2020Article
- Whole-genome comparison between the type strain of Halobacterium salinarum (DSM 3754MicrobiologyOpen · 2020Article
- Biochemical and Taxonomic Characterization of Novel Haloarchaeal Strains and Purification of the Recombinant Halotolerant α-Amylase Discovered in the Isolate.Frontiers in microbiology · 2020Article
- Unexpected host dependency of Antarctic Nanohaloarchaeota.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Sucrose Metabolism in Haloarchaea: Reassessment Using Genomics, Proteomics, and Metagenomics.Applied and environmental microbiology · 2019Article
- Review
- Archaeal biofilm formation.Nature reviews. Microbiology · 2018Review
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13 authors.
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Abstract
Deep Lake in Antarctica is a globally isolated, hypersaline system that remains liquid at temperatures down to -20 °C. By analyzing metagenome data and genomes of four isolates we assessed genome variation and patterns of gene exchange to learn how the lake community evolved. The lake is completely and uniformly dominated by haloarchaea, comprising a hierarchically structured, low-complexity community that differs greatly to temperate and tropical hypersaline environments. The four Deep Lake isolates represent distinct genera (∼85% 16S rRNA gene similarity and ∼73% genome average nucleotide identity) with genomic characteristics indicative of niche adaptation, and collectively account for ∼72% of the cellular community. Network analysis revealed a remarkable level of intergenera gene exchange, including the sharing of long contiguous regions (up to 35 kb) of high identity (∼100%). Although the genomes of closely related Halobacterium, Haloquadratum, and Haloarcula (>90% average nucleotide identity) shared regions of high identity between species or strains, the four Deep Lake isolates were the only distantly related haloarchaea to share long high-identity regions. Moreover, the Deep Lake high-identity regions did not match to any other hypersaline environment metagenome data. The most abundant species, tADL, appears to play a central role in the exchange of insertion sequences, but not the exchange of high-identity regions. The genomic characteristics of the four haloarchaea are consistent with a lake ecosystem that sustains a high level of intergenera gene exchange while selecting for ecotypes that maintain sympatric speciation. The peculiarities of this polar system restrict which species can grow and provide a tempo and mode for accentuating gene exchange.
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