Sulfurimonas paralvinellae sp. nov., a novel mesophilic, hydrogen- and sulfur-oxidizing chemolithoautotroph within the Epsilonproteobacteria isolated from a deep-sea hydrothermal vent polychaete nest, reclassification of Thiomicrospira denitrificans as Sulfurimonas denitrificans comb. nov. and emended description of the genus Sulfurimonas.
Ken Takai,Masae Suzuki,Satoshi Nakagawa,Masayuki Miyazaki,Yohey Suzuki,Fumio Inagaki,Koki Horikoshi +6 more
TLDR
Strain GO25(T) represents the first deep-sea epsilonproteobacterium capable of growth by both hydrogen and sulfur oxidation and is proposed as the reclassification of Thiomicrospira denitrificans as Sulfurimonas denitRificans comb.Abstract:
A novel mesophilic bacterium, strain GO25T, was isolated from a nest of hydrothermal vent polychaetes, Paralvinella sp., at the Iheya North field in the Mid-Okinawa Trough. Cells were motile short rods with a single polar flagellum. Growth was observed between 4 and 35 °C (optimum 30 °C; 13–16 h doubling time) and between pH 5.4 and 8.6 (optimum pH 6.1). The isolate was a facultatively anaerobic chemolithoautotroph capable of growth using molecular hydrogen, elemental sulfur or thiosulfate as the sole energy source, carbon dioxide as the sole carbon source, ammonium or nitrate as the sole nitrogen source and elemental sulfur, thiosulfate or yeast extract as the sole sulfur source. Strain GO25T represents the first deep-sea epsilonproteobacterium capable of growth by both hydrogen and sulfur oxidation. Nitrate or molecular oxygen (up to 10 % partial pressure) could serve as the sole electron acceptor to support growth. Metabolic products of nitrate reduction shifted in response to the electron donor provided. The G+C content of genomic DNA was 37.6 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the novel isolate belonged to the genus Sulfurimonas and was most closely related to Sulfurimonas autotrophica OK10T (96.3 % sequence similarity). DNA–DNA hybridization demonstrated that the novel isolate could be differentiated genotypically from Sulfurimonas autotrophica OK10T. On the basis of the physiological and molecular properties of the novel isolate, the name Sulfurimonas paralvinellae sp. nov. is proposed, with strain GO25T (=JCM 13212T=DSM 17229T) as the type strain. Thiomicrospira denitrificans DSM 1251T (=ATCC 33889T) is phylogenetically associated with Sulfurimonas autotrophica OK10T and Sulfurimonas paralvinellae GO25T. Based on the phylogenetic relationship between Thiomicrospira denitrificans DSM 1251T, Sulfurimonas autotrophica OK10T and Sulfurimonas paralvinellae GO25T, we propose the reclassification of Thiomicrospira denitrificans as Sulfurimonas denitrificans comb. nov. (type strain DSM 1251T=ATCC 33889T). In addition, an emended description of the genus Sulfurimonas is proposed.read more
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Biochemistry and molecular biology of lithotrophic sulfur oxidation by taxonomically and ecologically diverse bacteria and archaea.
TL;DR: Phylogenetic and biomolecular fossil data suggest that the ubiquity of sox genes could be due to horizontal transfer, and coupled sulfate reduction/sulfide oxidation pathways, originating in planktonic ancestors of Chromatiaceae or Chlorobi, could be ancestral to all sulfur-lithotrophic processes.
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Sulfur-driven autotrophic denitrification: diversity, biochemistry, and engineering applications
TL;DR: This review summarizes recent researches on autotrophic denitrification, highlighting its diversity, metabolic traits, and engineering applications.
Journal ArticleDOI
Comparative Genomic Analysis of the Class Epsilonproteobacteria and Proposed Reclassification to Epsilonbacteraeota (phyl. nov.)
David W. Waite,Inka Vanwonterghem,Christian Rinke,Donovan H. Parks,Ying Zhang,Ken Takai,Stefan M. Sievert,Joerg Simon,Barbara J. Campbell,Thomas E. Hanson,Tanja Woyke,Martin G. Klotz,Martin G. Klotz,Philip Hugenholtz +13 more
TL;DR: It is concluded that the continued inclusion of Epsilonproteob bacteria within the Proteobacteria is not warranted, and this group should be reassigned to a novel phylum for which the name Epsilonbacteraeota is proposed, and a number of subordinate changes are recommended to ensure consistency with the genome-based phylogeny.
Journal ArticleDOI
Electron donors for autotrophic denitrification
Francesco Di Capua,Francesco Di Capua,Francesco Pirozzi,Piet N.L. Lens,Giovanni Esposito,Giovanni Esposito +5 more
TL;DR: In this article, the state of the art of the most used electron donors for AuDen and highlights recent advances on the application of novel inorganic compounds, reactor configurations and microorganisms to support denitrification.
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Sulfur-oxidizing bacteria in environmental technology.
Dana Pokorna,Jana Zabranska +1 more
TL;DR: Biological desulfurization methods are currently promoted to abiotic methods because they are less expensive and do not produce undesirable materials which must be disposed of.
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