Draft Genome Sequence of Thermophilic
            <i>Exiguobacterium</i>
            sp. Strain JLM-2, Isolated from Deep-Sea Ferromanganese Nodules

Zhang, De-Chao; Liu, Yanxia; Huo, Ying‐Yi; Xu, Xue-Wei; Li, Xinzheng

doi:10.1128/genomea.00794-15

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…They were represented by sequences mainly related to Exiguobacterium aurantiacum, Marinilactibacillus piezotolerans , and Planococcus maritimus . This presents a first report of their occurrence in hydrothermal environments, however, their genera i.e., Exiguobacterium and Planococcus encompass numerous meso- and thermophilic members that have been identified or isolated from shallow-water and deep-sea hydrothermal vents (Crapart et al, 2007 ; Vishnivetskaya et al, 2009 ; Maugeri et al, 2010 ; Zhang et al, 2015a ; Chen and Sun, 2017 ). At Dominica, different hydrothermal sites were dominated by different Bacilli genera: sequences related to Exiguobacterium and Marinilactibacillus dominated the cooler Champagne site, while Planococcus was among the 10 most abundant genera at the hotter Soufriére site.…”

Section: Discussionmentioning

confidence: 99%

Bacterial Diversity and Biogeochemistry of Two Marine Shallow-Water Hydrothermal Systems off Dominica (Lesser Antilles)

et al. 2017

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Shallow-water hydrothermal systems represent extreme environments with unique biogeochemistry and high biological productivity, at which autotrophic microorganisms use both light and chemical energy for the production of biomass. Microbial communities of these ecosystems are metabolically diverse and possess the capacity to transform a large range of chemical compounds. Yet, little is known about their diversity or factors shaping their structure or how they compare to coastal sediments not impacted by hydrothermalism. To this end, we have used automated ribosomal intergenic spacer analysis (ARISA) and high-throughput Illumina sequencing combined with porewater geochemical analysis to investigate microbial communities along geochemical gradients in two shallow-water hydrothermal systems off the island of Dominica (Lesser Antilles). At both sites, venting of hydrothermal fluids substantially altered the porewater geochemistry by enriching it with silica, iron and dissolved inorganic carbon, resulting in island-like habitats with distinct biogeochemistry. The magnitude of fluid flow and difference in sediment grain size, which impedes mixing of the fluids with seawater, were correlated with the observed differences in the porewater geochemistry between the two sites. Concomitantly, individual sites harbored microbial communities with a significantly different community structure. These differences could be statistically linked to variations in the porewater geochemistry and the hydrothermal fluids. The two shallow-water hydrothermal systems of Dominica harbored bacterial communities with high taxonomical and metabolic diversity, predominated by heterotrophic microorganisms associated with the Gammaproteobacterial genera Pseudomonas and Pseudoalteromonas, indicating the importance of heterotrophic processes. Overall, this study shows that shallow-water hydrothermal systems contribute substantially to the biogeochemical heterogeneity and bacterial diversity of coastal sediments.

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Section: Discussionmentioning

confidence: 99%

Bacterial Diversity and Biogeochemistry of Two Marine Shallow-Water Hydrothermal Systems off Dominica (Lesser Antilles)

et al. 2017

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“…These bacteria have also been characterized as halo-, psychro- and thermo-tolerant and some even resist highly toxic arsenic ( Vishnivetskaya et al, 2007 ; Belfiore et al, 2013 ; Remonsellez et al, 2018 ; Castro-Severyn et al, 2019 ). Different strains from this genus have been isolated from multiple extreme environments that vary from marine water, permafrost, deserts, salt flats and even stromatolites ( Rodrigues et al, 2006 ; Ordoñez et al, 2013 ; Tang et al, 2013 ; Vishnivetskaya et al, 2014 ; Zhang et al, 2015 ). The presence of these bacteria in various environments and under different extreme conditions is evidence of their great plasticity and adaptability, which correlates with the great genetic diversity shown ( Vishnivetskaya et al, 2009 ; Castro-Severyn et al, 2017 ; da Costa et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Genomic Variation and Arsenic Tolerance Emerged as Niche Specific Adaptations by Different Exiguobacterium Strains Isolated From the Extreme Salar de Huasco Environment in Chilean – Altiplano

et al. 2020

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“…Exiguobacterium is a genus of polyextremophilic bacteria that can survive in a wide range of extreme environmental conditions [1][2][3][4][5]. Indeed, most strains were isolated from acidic and alkaline niches [4,6], salterns [7], and from ecosystems suffering from extreme temperatures [8][9][10][11], high UV radiation (UVR) or high concentrations of heavy metals and metalloids [12][13][14]. With 17 known species, Exiguobacterium has been found to be of interest as a model system for the study of the mechanisms involved in the response to stress and for potential applications in biotechnology, bioremediation, and agriculture [15].…”

Section: Introductionmentioning

confidence: 99%

From Genes to Nanotubes: Exploring the UV-Resistome in the Andean ExtremophileExiguobacteriumSp. S17

Galván,

Alonso-Reyes,

Albarracín

2024

Preprint

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Exiguobacteriumsp. S17, a polyextremophile isolated from modern stromatolites in a High-Altitude Andean Lake, exhibits a remarkable multi-resistance profile against toxic arsenic concentrations, high levels of UV radiation (UV), and elevated salinity. Here, we perform a comprehensive characterization of the mechanisms underlying the UV resistance of S17 (UV-resistome/UVres) through comparative genomics within theExiguobacteriumgenus. Additionally, we describe the morphological and ultrastructural changes in the strain when exposed to different levels of UV.UVresinExiguobacteriumspecies ranges from 112 to 132 genes, with a median of 117. While we anticipatedExiguobacteriumsp. S17 to lead the non-HAAL UVres, it ranked eleventh with 113 genes. This larger UVresinExiguobacteriumspp. aligns with their known adaptation to extreme environments. Morphological and ultrastructural analyses using Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) demonstrated significant changes in response to UV exposure in S17 cells. We observed the formation of nanotubes (NTs), a novel finding inExiguobacteriumspp., which increased with higher UV-B doses. These NTs, confirmed to be membranous structures through sensitivity studies and SEM/TEM imaging, suggest a role in cellular communication and environmental sensing. Genomic evidence supports the presence of essential NT biogenesis genes in S17, further elucidating its adaptive capabilities.Our study highlights the complex interplay of genetic and phenotypic adaptations enablingExiguobacteriumsp. S17 to thrive in extreme UV environments. The novel discovery of NTs under UV stress presents a new avenue for understanding bacterial survival strategies in harsh conditions.

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Draft Genome Sequence of Thermophilic Exiguobacterium sp. Strain JLM-2, Isolated from Deep-Sea Ferromanganese Nodules

Cited by 7 publications

References 9 publications

Bacterial Diversity and Biogeochemistry of Two Marine Shallow-Water Hydrothermal Systems off Dominica (Lesser Antilles)

Bacterial Diversity and Biogeochemistry of Two Marine Shallow-Water Hydrothermal Systems off Dominica (Lesser Antilles)

Genomic Variation and Arsenic Tolerance Emerged as Niche Specific Adaptations by Different Exiguobacterium Strains Isolated From the Extreme Salar de Huasco Environment in Chilean – Altiplano

From Genes to Nanotubes: Exploring the UV-Resistome in the Andean ExtremophileExiguobacteriumSp. S17

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