Abstract:
:A novel, thermophilic, obligately chemolithoautotrophic, sulfur/thiosulfate-oxidizing bacterium was isolated from subsurface geothermal aquifer water (temperature approximately 70 degrees C) in the Hishikari gold mine, Japan. Cells of the isolate, designated strain C55T, were motile, straight rods with a single polar flagellum. Growth was observed at temperatures between 35 and 62 degrees C (optimum 50-55 degrees C; 60 min doubling time) and pH between 5.2 and 7.7 (optimum pH 6.5-7.0). High growth rate of strain C55T was observed on either thiosulfate or elemental sulfur as a sole energy source, with molecular oxygen as the only electron acceptor. None of the organic compounds tested supported or stimulated growth of strain C55T. The G+C content of the genomic DNA was 66.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain C55T was affiliated to the beta-Proteobacteria, but was distantly related to recognized genera. On the basis of its physiological and molecular properties, strain C55T (=JCM12421T=DSM 16629T=ATCC BAA-941T) is proposed as the type strain of Thiobacter subterraneus gen. nov., sp. nov.
journal_name
Int J Syst Evol Microbiolauthors
Hirayama H,Takai K,Inagaki F,Nealson KH,Horikoshi Kdoi
10.1099/ijs.0.63389-0keywords:
subject
Has Abstractpub_date
2005-01-01 00:00:00pages
467-472issue
Pt 1eissn
1466-5026issn
1466-5034journal_volume
55pub_type
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