Thiosulfate Oxidation by a Thermo-Neutrophilic Hydrogen-Oxidizing Bacterium, Hydrogenobacter thermophilus

Ryoko SANO; Masafumi KAMEYA; Satoshi WAKAI; Hiroyuki ARAI; Yasuo IGARASHI; Masaharu ISHII; Yoshihiro SAMBONGI

doi:10.1271/bbb.90948

Biochemistry & Molecular Biology Notes

Thiosulfate Oxidation by a Thermo-Neutrophilic Hydrogen-Oxidizing Bacterium, Hydrogenobacter thermophilus

Ryoko SANO, Masafumi KAMEYA, Satoshi WAKAI, Hiroyuki ARAI, Yasuo IGARASHI, Masaharu ISHII, Yoshihiro SAMBONGI

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Keywords: Hydrogenobacter thermophilus, neutrophilic, sox genes, thermophilic, thiosulfate oxidation

JOURNAL FREE ACCESS

2010 Volume 74 Issue 4 Pages 892-894

DOI https://doi.org/10.1271/bbb.90948

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Abstract

The thermo-neutrophilic hydrogen-oxidizing bacterium Hydrogenobacter thermophilus constitutively oxidizes thiosulfate. Soluble extracts of it showed temperature-dependent thiosulfate oxidation activity with an optimum at 60 °C. A gene cluster for sox (sulfur oxidation) is presumably responsible for this activity. Among the cluster, two tandemly coded soxA genes were uniquely found. These results suggest that the Sox system is widespread even in thermo-neutrophilic environments.

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