Reclassification of Thermoterrabacterium ferrireducens as Carboxydothermus ferrireducens comb. nov., and emended description of the genus Carboxydothermus

DOI Web Site 被引用文献3件
  • A. I. Slobodkin
    Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117 312 Moscow, Russia
  • T. G. Sokolova
    Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117 312 Moscow, Russia
  • A. M. Lysenko
    Winogradsky Institute of Microbiology, Russian Academy of Sciences, Prospect 60-letiya Oktyabrya 7/2, 117 312 Moscow, Russia
  • J. Wiegel
    Department of Microbiology, University of Georgia, Athens, GA 30602, USA

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<jats:p>Similarities in phylogeny and metabolic properties between the type species of two monospecific genera of thermophilic anaerobic bacteria, <jats:italic>Carboxydothermus hydrogenoformans</jats:italic> and <jats:italic>Thermoterrabacterium ferrireducens</jats:italic>, and analysis of their recently available 16S rRNA gene sequences warranted clarification of their taxonomic positions. We have determined that the value of DNA–DNA hybridization between the type strains is 53 %. Additional physiological studies revealed that <jats:italic>C. hydrogenoformans</jats:italic> Z-2901<jats:sup>T</jats:sup> is capable of Fe(III) reduction with H<jats:sub>2</jats:sub> as an electron donor and ferrihydrite as an electron acceptor. <jats:italic>T. ferrireducens</jats:italic> JW/AS-Y7<jats:sup>T</jats:sup> is able to grow and utilize CO with ferrihydrite as an electron acceptor without hydrogen or acetate production. We therefore reclassify <jats:italic>Thermoterrabacterium ferrireducens</jats:italic> as <jats:italic>Carboxydothermus ferrireducens</jats:italic> comb. nov. (type strain JW/AS-Y7<jats:sup>T</jats:sup>=DSM 11255<jats:sup>T</jats:sup>=VKM B-2392<jats:sup>T</jats:sup>). The description of the genus <jats:italic>Carboxydothermus</jats:italic> is emended to include such important physiological properties as growth on organic compounds and capacity for Fe(III) reduction.</jats:p>

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