Related Experiment Video
Updated: Jul 14, 2026

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Thiosulfate oxidation by a moderately thermophilic hydrogen-oxidizing bacterium, Hydrogenophilus thermoluteolus
Daisuke Miyake1, Shin-ichi Ichiki, Miyako Tanabe
1Graduate School of Biosphere Science, Hiroshima University, CREST of Japan Science and Technology Corporation, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8528, Japan, sambongi@hiroshima-u.ac.jp.
Abstract:
The moderately thermophilic Betaproteobacterium, Hydrogenophilus thermoluteolus, not only oxidizes hydrogen, the principal electron donor for growth, but also sulfur compounds including thiosulfate, a process enabled by sox genes. A periplasmic extract of H. thermoluteolus showed significant thiosulfate oxidation activity. Ten genes apparently involved in thiosulfate oxidation (soxEFCDYZAXBH) were found on a 9.7-kb DNA fragment of the H. thermoluteolus chromosome. The proteins SoxAX, which represent c-type cytochromes, were co-purified from the cells of H. thermoluteolus; they enhanced the thiosulfate oxidation activity of the periplasmic extract when added to the latter.
Related Concept Videos
Anoxygenic Phototrophic Bacteria
Hyperthermophilic Bacteria
Microbes and the Sulfur Cycle
Preparation and Reactions of Thiols
Metabolism of Chemolithotrophs
Anoxygenic Photosynthesis

