Sulfurisphaera

Sulfurisphaera
Scientific classification
Domain: Archaea
Kingdom: Crenarchaeota
Phylum: Crenarchaeota
Class: Thermoprotei
Order: Sulfolobales
Family: Sulfolobaceae
Genus: Sulfurisphaera
Kurosawa, Itoh, Iwai, Sugai, Uda, Kimura, Horiuchi & Itoh, 1998
Species

In taxonomy, Sulfurisphaera is a genus of the Sulfolobaceae.

Description and significance

Sulfurisphaera is a facultatively anaerobic, thermophilic, Gram-negative archaeon that occurs in acidic solfataric fields. The organism grows under the temperature range of 63–92 °C with the optimum temperature at 84 °C, and under the pH range of 1.0–5.0, with an optimum of pH 2.0. It forms colonies that are smooth, roundly convex, and slightly yellow.

Genome structure

The genome of Sulfurisphaera is yet to be sequenced. The G + C content is estimated to be 30–33%.

Cell structure and metabolism

The spherical cells of Sulfurisphaera ohwakuensis are 1.2–1.5 µm in diameter. Thin sections of the organism reveal an envelope (approx. 24 nm) surrounding the cell membrane. It grows organotrophically on proteinaceous, complex substrates such as yeast extract, peptone, and tryptone. Growth was not observed on single sugars or amino acids such as D-glucose, D-galactose, D-fructose, D-xylose, lactose, maltose, sucrose, alanine, glutamate, glycine, and histidine.

Ecology

The strains of Sulfurisphaera ohwakuensis were isolated from multiple locations in the acidic hot springs in Ohwaku Valley, Hakone, Japan.[1]

References

  1. ↑ See the NCBI webpage on Sulfurisphaera. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.

Further reading

Scientific journals

  • Kurosawa N; Itoh YH; Iwai T; Sugai A; Uda I; et al. (1998). "Sulfurisphaera ohwakuensis gen. nov., sp. nov., a novel extremely thermophilic acidophile of the order Sulfolobales". Int. J. Syst. Bacteriol. 48: 451–456. doi:10.1099/00207713-48-2-451. PMID 9731283.
  • Mikkelsen, Deirdre; Kappler, Ulrike; McEwan, Alastair G.; Sly, Lindsay I. (24 February 2009). "Probing the archaeal diversity of a mixed thermophilic bioleaching culture by TGGE and FISH" (PDF). Systematic and Applied Microbiology. 32 (7): 501–513. doi:10.1016/j.syapm.2009.06.001.

Scientific books

  • Stetter, KO (1989). "Order III. Sulfolobales ord. nov. Family Sulfolobaceae fam. nov.". In JT Staley; MP Bryant; N Pfennig; JG Holt. Bergey's Manual of Systematic Bacteriology, Volume 3 (1st ed.). Baltimore: The Williams & Wilkins Co. p. 169. ISBN 0-683-07908-5.

Scientific databases


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