<i>Kosmotoga</i>

L’Haridon, Stéphane; Nesbø, Camilla; Farrell, Anne; Zhaxybayeva, Olga

doi:10.1002/9781118960608.gbm01863

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…Despite deeply branching in most 16S rRNA phylogenies, Mesoaciditogales share some common features with a subset of later-diversified Thermotogota. First, M. lauensis and A. saccharophila can grow at temperatures as low as 45 and 30 °C, respectively ( Reysenbach et al 2013 ; Itoh et al 2016 ), making their temperature tolerances similar to multiple species in the Petrotogales order, whose OGTs range from 37 to 70 °C ( Davey et al 1993 ; Wery et al 2001 ; L’Haridon et al 2021 ). Second, outside of Mesoaciditogales, M. lauensis ’ 16S rRNA gene has the closest nucleotide identity to that of the Kosmotoga spp.…”

Section: Introductionmentioning

confidence: 99%

Early Divergence and Gene Exchange Highways in the Evolutionary History of Mesoaciditogales

Farrell,

Nesbø,

Zhaxybayeva

2023

Genome Biology and Evolution

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The placement of a non-hyperthermophilic order Mesoaciditogales as the earliest branching clade within the Thermotogota phylum challenges the prevailing hypothesis that the last common ancestor of Thermotogota was a hyperthermophile. Yet, given the long branch leading to the only two Mesoaciditogales described to-date, the phylogenetic position of the order may be due to the long branch attraction artifact. By testing various models and applying data recoding in phylogenetic reconstructions, we observed that early branching of Mesoaciditogales within Thermotogota is strongly supported by the conserved marker genes assumed to be vertically inherited. However, based on the taxonomic content of 1,181 gene families and a phylogenetic analysis of 721 gene family trees, we also found that a substantial number of Mesoaciditogales genes are more closely related to species from the order Petrotogales. These genes contribute to coenzyme transport and metabolism, fatty acid biosynthesis, genes known to respond to heat and cold stressors, and include many genes of unknown functions. The Petrotogales comprise moderately thermophilic and mesophilic species with similar temperature tolerances to that of Mesoaciditogales. Our findings hint at extensive horizontal gene transfer between, or parallel independent gene gains by, the two ecologically similar lineages, and suggest that the exchanged genes may be important for adaptation to comparable temperature niches.

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Section: Introductionmentioning

confidence: 99%

Early Divergence and Gene Exchange Highways in the Evolutionary History of Mesoaciditogales

Farrell,

Nesbø,

Zhaxybayeva

2023

Genome Biology and Evolution

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show abstract

“…saccharophila can grow at temperatures as low as 45°C and 30°C, respectively (Reysenbach et al 2013;Itoh et al 2016), making their temperature tolerances similar to multiple species in the Petrotogales order, whose OGTs range from 37 to 70°C (Davey et al 1993;L'Haridon et al 2021;Wery et al 2001). Second, outside of Mesoaciditogales, Mesoaciditoga lauensis' 16S rRNA gene has the closest nucleotide identity to that of the Kosmotoga spp.…”

Section: Introductionmentioning

confidence: 99%

Early divergence and gene exchange highways in the evolutionary history ofMesoaciditogales

Farrell

Nesbø

Zhaxybayeva

2023

Preprint

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The placement of a non-hyperthermophilic order Mesoaciditogales at the base of Thermotogota tree challenges the prevailing hypothesis that the last common ancestor of Thermotogota was a hyperthermophile. Yet, given the long branch leading to the only two Mesoaciditogales described to-date, the phylogenetic position of the order may be due to the long branch attraction artifact. By testing various models and applying data recoding in phylogenetic reconstructions, we observed that Mesoaciditogales' basal placement is strongly supported by the conserved marker genes assumed to be vertically inherited. However, based on the taxonomic content of 1,181 gene families and a phylogenetic analysis of 721 gene family trees, we also found that a substantial number of Mesoaciditogales genes are more closely related to species from the order Petrotogales. These genes contribute to coenzyme transport and metabolism, fatty acid biosynthesis, genes known to respond to heat and cold stressors, and include many genes of unknown functions. The Petrotogales comprise moderately thermophilic and mesophilic species with similar temperature tolerances to that of Mesoaciditogales. Our findings hint at extensive horizontal gene transfer between, or parallel independent gene gains by, the two ecologically similar lineages, and suggest that the exchanged genes may be important for adaptation to comparable temperature niches.

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Kosmotoga

Cited by 2 publications

References 31 publications

Early Divergence and Gene Exchange Highways in the Evolutionary History of Mesoaciditogales

Early Divergence and Gene Exchange Highways in the Evolutionary History of Mesoaciditogales

Early divergence and gene exchange highways in the evolutionary history ofMesoaciditogales

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