Sulfobacillus Thermosulfidooxidans

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Classification

Bacteria; Firmicutes; Clostridia; Clostridiales; Clostridiales Family XVII. Incertae Sedis; Sulfobacillus

Species

Sulfobacillus Thermosulfidooxidans

NCBI: Taxonomy[1] Genomes[2]

Description and Significance

S. thermosulfidooxidans was first isolated by in 1978 by Golovacheva and Karavaiko from a copper-zinc-pyrite deposit in Kazakhstan.[3] It is a Gram-positive, non-motile, spore-forming, bacillus. S. thermosulfidooxidans is thermophilic and acidophilic with a temperature range of 20-60°C and pH range of 1.5 – 5.5, however optimum growth occurs at approximately 50-55°C with a pH of 1.9 – 2.4.(4) There are three know strains of S. thermosulfidooxidans. These strains include S.thermosulfidooxidans str Cutipay, S. thermosulfidooxidans ST, and S. thermosulfidooxidans DSM 9293.(5)[4]

Genome Structure

A draft genome sequence has been created of S. thermosulfidooxidans str Cutipay using whole genome shotgun sequencing with a mixed technology method.(6) This strain has a genome assembly containing 3,862,012 bp.(6) The genome contains 3,600 genes including Sulfur and Carbon metabolizing enzymes.(6) Arsenic resistance arsRB operon was found which includes arsR regulator (codes for transcriptional regulator), arsB (codes for an arsenite efflux pump in the membrane), and arsC gene(codes for arsenate reductase)indicating an ability for arsenic resistance in this strain.(6)(7) Copper sensing genes copR and copS were found to be present in the genome in addition to gene cueR.(6) The presence of these three copper-resistance genes suggests that operon copAZ could also be present.(6)


Cell Structure, Metabolism and Life Cycle

S. thermosulfidooxidans form rod-shaped, non-motile cells that grow individually, in pairs, or as short chains.(4) Colonies are round and initially appear yellowish and shining then turning reddish-brown on media containing Fe2+.(4) When in a dormant state, S. thermosulfidooxidans can form and Endospore which can be located subterminally, terminally, or paracentrally.(4) All organisms in the genus Sulfobacillus have a mixotrophic metabolism meaning that they can exist as an autotroph or a heterotroph oxidizing sulfide minerals, Iron, Tetrathionate, Sulfur, and Thiosulfate in the presence of some organic substrates.(4)(8) S. thermosulfidooxidans is also a facultative organotroph with the ability to get energy and carbon from organic compounds with or without the presence of oxygen.(4)(8)


Ecology and Pathogenesis

References

1."Sulfobacillus Thermosulfidooxidans." NCBI. U.S. National Library of Medicine, n.d. Web. 23 Apr. 2014. <http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=28034>.

2." Representative." National Center for Biotechnology Information. U.S. National Library of Medicine, n.d. Web. 23 Apr. 2014. <http://www.ncbi.nlm.nih.gov/genome/11441>.

3.Golovacheva, and Karavaiko. "Result Filters." National Center for Biotechnology Information. U.S. National Library of Medicine, n.d. Web. 23 Apr. 2014. <http://www.ncbi.nlm.nih.gov/pubmed/101742>.

4. Bergey's Manual of Systematic Bacteriology. Ed. George M. Garrity, William B. Whitman, Paul De Vos, Dorothy Jones, Noel. R. Krieg, Wolfgang Ludwig, Fred A. Rainey, and Karl-Heinz Schleifer. 2nd ed. Vol. 3. New York: Springer, 2009. 1181-183. Print. The Firmicutes.

5. " Representative." National Center for Biotechnology Information. U.S. National Library of Medicine, n.d. Web. 24 Apr. 2014. <http://www.ncbi.nlm.nih.gov/genome/?term=sulfobacillus+thermosulfidooxidans>.

6. Travisany, Dante, Alex Di Genova, Andrea A. Bobadilla-Fazzini, Pillar Parada, and Alejandro Maass. "American Society for MicrobiologyJournal of Bacteriology." Draft Genome Sequence of the Sulfobacillus Thermosulfidooxidans Cutipay Strain, an Indigenous Bacterium Isolated from a Naturally Extreme Mining Environment in Northern Chile. Journal of Bacteriology, 2012. Web. 24 Apr. 2014. <http://jb.asm.org/content/194/22/6327.full#ref-9>.

7."The Identification and Characterisation of the Arsenic Resistance Genes of the Gram-positive Bacterium, Sulfobacillus Thermosulfidooxidans VKM B-1269T." The Identification and Characterisation of the Arsenic Resistance Genes of the Gram-positive Bacterium, Sulfobacillus Thermosulfidooxidans VKM B-1269T. Stellenbosch Universitym, Mar. 2007. Web. 24 Apr. 2014. <http://hdl.handle.net/10019.1/19886>.

8. Slonczewski, Joan, and John Watkins. Foster. Microbiology: An Evolving Science. 2nd ed. New York: W.W. Norton, 2011. Print.