• Source: Thermosphaera

Thermosphaera is a genus of the Desulfurococcaceae. They are a group of prokaryotic organisms which have been discovered in extremely hot environments such as sulfur springs, volcanoes, and magma pools. Isolates of Thermosphaera were first identified in 1998 from the Obsidian Pool in Yellowstone National Park.




Cell structure and metabolism


Cells of Thermosphaera are cocci (spherical) and form grape-like aggregates during the exponential growth phase. In the late exponential and stationary growth phases, smaller groups, including some single cells, were visible. Aggregates were shown to have several flagella; single cells could have as many as eight. The cell envelope is an amorphous layer covering a cytoplasmic membrane. Temperatures exceeding 92 °C inhibits growth, as does sulfur and hydrogen. Thermosphaera cells are heterotrophic, processing energy from yeast.




Ecology


Thermosphaera are found mainly in sulfuric pools, where they thrive on the extreme temperatures. In terms of research and economic significance, learning more about these organisms and their properties may help advancements in biotechnology.




Genome structure


Sequencing the 16S rRNA of Thermosphaera showed that this isolate was a member of the group Crenarchaeota and closely related to Staphylothermus and Desulfurococcus.




See also


List of Archaea genera




References






Further reading


Huber R; Dyba D; Huber H; Burggraf S; Rachel R (1998). "Sulfur-inhibited Thermosphaera aggregans sp. nov., a new genus of hyperthermophilic archaea isolated after its prediction from environmentally derived 16S rRNA sequences". Int. J. Syst. Bacteriol. 48: 31–38. doi:10.1099/00207713-48-1-31. PMID 9542073.
Burggraf S; Huber H; Stetter KO (1997). "Reclassification of the crenarchael orders and families in accordance with 16S rRNA sequence data". Int. J. Syst. Bacteriol. 47 (3): 657–660. doi:10.1099/00207713-47-3-657. PMID 9226896.
Huber R; Burggraf S; Mayer T; Barns SM; Rossnagel P; Stetter KO (1995). "Isolation of a hyperthermophilic archaeum predicted by in situ RNA analysis". Nature. 376 (6535): 57–58. Bibcode:1995Natur.376...57H. doi:10.1038/376057a0. PMID 7541115. S2CID 4335718.
Zillig W; Stetter KO; Prangishvilli D; Schafer W; Wunderl S; Janekovic D; et al. (1982). "Desulfurococcaceae, the second family of the extremely thermophilic, anaerobic, sulfur-respiring Thermoproteales". Zentralbl. Bakteriol. Parasitenkd. Infektionskr. Hyg. Abt. 1 Orig. C3: 304–317.




External links

Kata Kunci Pencarian:

• Daftar genus Arkea
• Daftar genom arkea yang sudah diurutkan
• Thermosphaera
• Desulfurococcaceae
• List of Archaea genera
• Thermoproteus
• List of sequenced archaeal genomes