Vestiges of adaptation to the mesophilic environment in the genome of tepiditoga spiralis gen. Nov., sp. nov.

Koji Mori, Kenta Sakurai, Akira Hosoyama, Takeshi Kakegawa, Satoshi Hanada

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A novel anaerobic heterotrophic strain, designated strain sy52T, was isolated from a hydrothermal chimney at Suiyo Seamount in the Pacific Ocean. A 16S rRNA gene analysis revealed that the strain belonged to the family Petrotogaceae in the phylum Thermotogae. The strain was mesophilic with optimum growth at 48°C and the phylum primarily comprised hyperthermophiles and thermophiles. Strain sy52T possessed unique genomic characteristics, such as an extremely low G+C content and 6 copies of rRNA operons. Genomic analyses of strain sy52T revealed that amino acid usage in the predicted proteins resulted from adjustments to mesophilic environments. Genomic features also indicated independent adaptions to the mesophilic environment of strain sy52T and Mesotoga species, which belong to the mesophilic lineage in the phylum Thermotogae. Based on phenotypic and phylogenetic evidence, strain sy52T is considered to represent a novel genus and species in the family Petrotogaceae with the proposed name Tepiditoga spiralis gen. nov., sp. nov.

Original languageEnglish
Article numberME20046
Pages (from-to)1-8
Number of pages8
JournalMicrobes and environments
Volume35
Issue number4
DOIs
Publication statusPublished - 2020

Keywords

  • Mesophilic environment
  • Tepiditoga spiralis
  • Thermotogae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Soil Science
  • Plant Science

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