Mizugakiibacter sediminis gen. nov., sp. nov., isolated from a freshwater lake

Int J Syst Evol Microbiol. 2014 Dec;64(Pt 12):3983-3987. doi: 10.1099/ijs.0.064659-0. Epub 2014 Sep 11.


A novel, moderately thermophilic, bacterial strain (skMP5(T)) was isolated from sediment of a freshwater lake in Japan. The cells were rod-shaped, motile and Gram-stain-negative. Growth was observed at temperatures ranging from 25 to 52 °C, with optimum growth observed at 48-50 °C. The pH range for growth was pH 5.0-8.2, with optimum growth at pH 6.0-7.0. The G+C content of genomic DNA was 72 mol%. The major components in the fatty acid profile were iso-C17 : 0 and iso-C17 : 1ω9c. The predominant isoprenoid quinone of the strain was ubiquinone Q-8. The strain was facultatively anaerobic, and reduced nitrate to nitrite under anoxic conditions. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolate was a member of the family Xanthomonadaceae within the class Gammaproteobacteria, showing highest sequence similarity with Tahibacter aquaticus RaM5-2 (93.6 %) and Metallibacterium scheffleri DKE6(T) (93.3 %). On the basis of phylogenetic and phenotypic properties, strain skMP5(T) represents a novel species of a new genus, Mizugakiibacter sediminis gen. nov., sp. nov. The type strain of the type species is skMP5(T) ( = DSM 27098(T) = NBRC 109608(T)).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Bacterial Typing Techniques
  • Base Composition
  • DNA, Bacterial / genetics
  • Fatty Acids / chemistry
  • Fresh Water / microbiology*
  • Geologic Sediments / microbiology*
  • Japan
  • Lakes / microbiology
  • Molecular Sequence Data
  • Phylogeny*
  • RNA, Ribosomal, 16S / genetics
  • Sequence Analysis, DNA
  • Ubiquinone / chemistry
  • Xanthomonadaceae / classification*
  • Xanthomonadaceae / genetics
  • Xanthomonadaceae / isolation & purification


  • DNA, Bacterial
  • Fatty Acids
  • RNA, Ribosomal, 16S
  • Ubiquinone
  • ubiquinone 8

Associated data

  • GENBANK/AB917594