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f Iodidimonas muriae gen. nov., sp. nov., an aerobic iodide-oxidizing bacterium isolated from brine of a natural gas and iodine recovery facility, and proposals of Iodidimonadaceae fam. nov., Iodidimonadales ord. nov., Emcibacteraceae fam. nov. and Emcibacterales ord. nov.

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  • Authors: Takao Iino1​ ,  Moriya Ohkuma1​ ,  Yoichi Kamagata2​ , Seigo Amachi3​
    • VIEW AFFILIATIONS
    • 1​ 1​Japan Collection of Microorganisms, RIKEN BioResource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan 2​ 2​Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan 3​ 3​Graduate School of Horticulture, Chiba University, 648 Matsudo, Matsudo, Chiba 271-8510, Japan
  • Correspondence Takao Iino [email protected]
  • First Published Online: 01 December 2016, International Journal of Systematic and Evolutionary Microbiology 66: 5016-5022, doi: 10.1099/ijsem.0.001462
  • Subject: New taxa - Proteobacteria
  • Received:
  • Accepted:
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Iodidimonas muriae gen. nov., sp. nov., an aerobic iodide-oxidizing bacterium isolated from brine of a natural gas and iodine recovery facility, and proposals of Iodidimonadaceae fam. nov., Iodidimonadales ord. nov., Emcibacteraceae fam. nov. and Emcibacterales ord. nov., Page 1 of 1

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  • A chemo-organotrophic iodide (I)-oxidizing bacterial strain, C-3, isolated from natural gas brine of an iodine recovery facility in Kujukuri, Chiba, Japan, was characterized for representation of a novel species in the class Alphaproteobacteria . Phylogenetic analysis based on the 16S rRNA gene sequence revealed that the nearest neighbours of strain C-3 were members of the genera Eilatimonas , Kordiimonas , Rhodothalassium and Temperatibacter with 88–91 % sequence similarity. Cells of strain C-3 were aerobic, Gram-staining-negative, non-sporulating and rod-shaped (1.3–3.6 µm in length). Strain C-3 grew optimally at 30 °C, pH 7.5 and with 3 % NaCl (w/v). Iodide oxidation to form molecular iodine (I2) was a unique trait for strain C-3, whereas the strain did not utilize iodide as a sole electron donor for chemolithoautotrophic growth. The major isoprenoid quinone was Q-10. The major cellular fatty acids were C18 : 1 ω7c and C16 : 1 ω5c. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and unidentified aminolipids. The G+C content of the genomic DNA was 58.5 mol%. Iodide oxidation and the major cellular fatty acids composition distinguished strain C-3 from phylogenetically related bacteria. On the basis of the phenotypic features and the phylogenetic position, a novel genus and species are proposed for strain C-3 (=JCM 17843=LMG 28660), to be named Iodidimonas muriae gen. nov., sp. nov. We also propose to place the distinct sublineages of the genera Iodidimonas gen. nov. and Emcibacter in the orders Iodidimonadales ord. nov. and Emcibacterales ord. nov., respectively, because these genera are located far apart from the order Kordiimonadales and form the distinct lineage in the class Alphaproteobacteria .

  • The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of Iodidimonas muriae C-3 and the phylogenetically related strains are LC127220-LC127222.

  • One supplementary figure and one supplementary table are available with the online Supplementary Material.

  • Abbreviations:
    BI Bayesian inference
    ML maximum-likelihood
    NJ neighbour-joining

© 2016 IUMS | Published by the Microbiology Society

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