著者

Koji Mori Kenta Sakurai Akira Hosoyama Takeshi Kakegawa Satoshi Hanada

出版者

Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles

雑誌

Microbes and Environments (ISSN:13426311)

巻号頁・発行日

vol.35, no.4, pp.ME20046, 2020 (Released:2020-09-18)

参考文献数

43

被引用文献数

11

---

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.