NDLI: Caldinitratiruptor microaerophilus, gen. nov., sp. nov. isolated from a French hot spring (Chaudes-Aigues, Massif Central): a novel cultivated facultative microaerophilic anaerobic thermophile pertaining to the Symbiobacterium branch within the Firmicutes

Content Provider	Springer Nature Link
Author	Fardeau, Marie Laure Barsotti, Vanessa Cayol, Jean Luc Guasco, Sophie Michotey, Valérie Joseph, Man Bonin, Patricia Ollivier, Bernard
Copyright Year	2010
Abstract	A novel facultative microaerophilic nitrate-reducing bacterium designated CA62NT was isolated from a thermal spring in France. Cells were non-motile rods (2–3 × 0.2 μm) and showed low cytoplasmic density when observed under a phase-contrast microscope. Strain CA62NT grew at temperatures between 50 and 75°C (optimum 65°C) and at a pH between 6.3 and 7.9 (optimum 7.0). NaCl was not required for growth but was tolerated up to 10 gl−1. Sulfate, thiosulfate, elemental sulfur, sulfite, and nitrite were not used as electron acceptors. Nitrate was reduced to nitrite. Strain CA62NT used lactate, pyruvate, glucose, mannose, fructose, and casamino acids and some amino acids as electron donors only in the presence of nitrate as electron acceptor. None of these substrates was fermented. The main end-products of glucose oxidation were acetate, CO2, and traces of H2. The G + C content of the genomic DNA was 70.3 mol% (HPLC techniques). Phylogenetic analysis of the small-subunit (SSU) ribosomal RNA (rRNA) gene sequence indicated that strain CA62NT was affiliated to the Symbiobacterium branch within the Firmicutes and had Symbiobacterium thermophilum and “S. toebii” as its closest phylogenetic relatives. On the basis of phylogenetical and physiological characteristics, strain CA62NT is proposed to be the type strain for the novel species in the novel genus, Caldinitratiruptor microaerophilus gen. nov., sp. nov. (DSM 22660, JCM 16183).
Starting Page	241
Ending Page	247
Page Count	7
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	14
Issue Number	3
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2010-02-18
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Caldinitratiruptor microaerophilus Thermophilic Microaerophilic Nitrate-reduction Hot spring Ecology Biotechnology Microbiology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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Caldinitratiruptor microaerophilus, gen. nov., sp. nov. isolated from a French hot spring (Chaudes-Aigues, Massif Central): a novel cultivated facultative microaerophilic anaerobic thermophile pertaining to the Symbiobacterium branch within the Firmicutes

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Caldinitratiruptor microaerophilus, gen. nov., sp. nov. isolated from a French hot spring (Chaudes-Aigues, Massif Central): a novel cultivated facultative microaerophilic anaerobic thermophile pertaining to the Symbiobacterium branch within the Firmicutes

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