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  • Desulfosoma caldarium gen. nov., sp. nov., a thermophilic sulfate-reducing bacterium from a terrestrial hot spring

    Author(s)
    Baena, Sandra
    Perdomo, Natalia
    Carvajal, Catalina
    Díaz, Carolina
    Patel, Bharat KC
    Griffith University Author(s)
    Patel, Bharat K.
    Year published
    2011
    Metadata
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    Abstract
    A thermophilic, sulfate-reducing bacterium, designated strain USBA-053T, was isolated from a terrestrial hot spring located at a height of 2500 m in the Colombian Andes (56 459 33.290 N 736 69 49.890 W), Colombia. Cells of strain USBA-053T were oval- to rod-shaped, Gramnegative and motile by means of a single polar flagellum. The strain grew autotrophically with H2 as the electron donor and heterotrophically on formate, propionate, butyrate, valerate, isovalerate, lactate, pyruvate, ethanol, glycerol, serine and hexadecanoic acid in the presence of sulfate as the terminal electron acceptor. The main end products from lactate ...
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    A thermophilic, sulfate-reducing bacterium, designated strain USBA-053T, was isolated from a terrestrial hot spring located at a height of 2500 m in the Colombian Andes (56 459 33.290 N 736 69 49.890 W), Colombia. Cells of strain USBA-053T were oval- to rod-shaped, Gramnegative and motile by means of a single polar flagellum. The strain grew autotrophically with H2 as the electron donor and heterotrophically on formate, propionate, butyrate, valerate, isovalerate, lactate, pyruvate, ethanol, glycerol, serine and hexadecanoic acid in the presence of sulfate as the terminal electron acceptor. The main end products from lactate degradation, in the presence of sulfate, were acetate, CO2 and H2S. Strain USBA-053T fermented pyruvate in the absence of sulfate and grew optimally at 57 6C (growth temperature ranged from 50 6C to 62 6C) and pH 6.8 (growth pH ranged from 5.7 to 7.7). The novel strain was slightly halophilic and grew in NaCl concentrations ranging from 5 to 30 g l"1, with an optimum at 25 g l"1 NaCl. Sulfate, thiosulfate and sulfite were used as electron acceptors, but not elemental sulfur, nitrate or nitrite. The G+C content of the genomic DNA was 56ᱠmol%. 16S rRNA gene sequence analysis indicated that strain USBA-053T was a member of the class Deltaproteobacteria, with Desulfacinum hydrothermale MT-96T as the closest relative (93% gene sequence similarity). On the basis of physiological characteristics and phylogenetic analysis, it is suggested that strain USBA-053T represents a new genus and novel species for which the name Desulfosoma caldarium gen. nov., sp. nov. is proposed. The type strain of the type species is USBA-053T(5KCTC 5670T5DSM 22027T).
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    Journal Title
    International Journal of Systematic and Evolutionary Microbiology
    Volume
    61
    Issue
    4
    DOI
    https://doi.org/10.1099/ijs.0.020586-0
    Subject
    Evolutionary biology
    Evolutionary biology not elsewhere classified
    Microbiology
    Medical microbiology
    Publication URI
    http://hdl.handle.net/10072/44288
    Collection
    • Journal articles

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