1887

Abstract

A novel thermophilic, chemoheterotrophic, Gram-negative-staining, multicellular filamentous bacterium, designated strain 110S, was isolated from an iron-rich coastal hydrothermal field in Japan. The isolate is facultatively aerobic and chemoheterotrophic. Phylogenetic analysis using 16S rRNA gene sequences nested strain 110S in a novel class-level clone cluster of the phylum ‘’. The isolate grows by dissimilatory iron- and nitrate-reduction under anaerobic conditions, which is the first report of these abilities in the phylum ‘’. The organism is capable of growth with oxygen, ferric iron and nitrate as a possible electron acceptor, has a wide range of growth temperatures, and tolerates higher NaCl concentrations for growth compared to the other isolates in the phylum. Using phenotypic and phylogenetic data, strain 110S ( = JCM 17282 = NBRC 107679 = DSM 23922 = KCTC 23289 = ATCC BAA-2145) is proposed as the type strain of a novel species in a new genus, gen. nov., sp. nov. In addition, as strain 110S apparently constitutes a new class of the phylum ‘’ with other related uncultivated clone sequences, we propose classis nov. and the subordinate taxa ord. nov. and fam. nov.

Funding
This study was supported by the:
  • JSPS for Young Scientists (Award 210528 and 203694)
  • The Ministry of Education, Culture, Sports, Science and Technology (Award 20248023)
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2013-08-01
2024-03-28
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