Biology:Thermococci
| Thermococci | |
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| Thermococcus gammatolerans | |
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| Class: | Thermococci Zillig and Reysenbach 2002
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In taxonomy, the Thermococci are a class of microbes within the Euryarchaeota.[1]
They live in extremely hot environments, such as hydrothermal vents, and they have optimal growth temperatures above 80 °C. Thermococcus and Pyrococcus (literally "balls of fire") are both obligately anaerobic chemoorganotrophs.
Thermococcus prefers 70–95 °C and Pyrococcus 70-100 °C. Palaeococcus helgesonii, recently discovered in the Tyrrhenian Sea, is an aerobic chemoheterotrophic that grows at temperatures of 45–85 °C with an optimal temperature of 80 °C. Thermococcus gammatolerans sp. nov. was recently discovered in the Guaymas Basin, and it grows at temperatures from 55–95 °C with an optimal temperaturearound 88 °C with an optimal pH of 6. It has pronounced radioresistance and can survive gamma radiation at 30 kGy.[2]
Thermococcus grows on organic substrates where there is a higher capacity of elemental sulfur. This archaeon mostly grows between temperatures 60–100 degrees Celsius. The average temperature where they thrive is around 85 degrees Celcius.
The DNA structure has a cicular genome with around 2,353 coding sequence, and 2,306 are identified.
See also
References
- ↑ See the NCBI webpage on Thermococci. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. http://ftp.ncbi.nih.gov/pub/taxonomy/. Retrieved 2007-03-19.
- ↑ "Airspade". https://arboraeration.com/airspade/.
Further reading
- Cavalier-Smith, T (2002). "The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification". Int. J. Syst. Evol. Microbiol. 52 (Pt 1): 7–76. doi:10.1099/00207713-52-1-7. PMID 11837318.
- Marguet, Evelyne; Gaudin, Marie; Gauliard, Emilie; Fourquaux, Isabelle; le Blond du Plouy, Stephane; Matsui, Ikuo; Forterre, Patrick (2013). "Membrane vesicles, nanopods and/or nanotubes produced by hyperthermophilic archaea of the genus Thermococcus". Biochemical Society Transactions 41 (1): 436–442. doi:10.1042/BST20120293. PMID 23356325.
- Woese, CR; Kandler O; Wheelis ML (1990). "Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya". Proc. Natl. Acad. Sci. USA 87 (12): 4576–4579. doi:10.1073/pnas.87.12.4576. PMID 2112744. Bibcode: 1990PNAS...87.4576W.
- Zillig W; Reysenbach AL (2001). "Class IV (sic) [V. Thermococci class. nov."]. in DR Boone. Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria (2nd ed.). New York: Springer Verlag. pp. 169. ISBN 978-0-387-98771-2. https://archive.org/details/bergeysmanualofs00boon/page/169.
- Garrity GM; Holt JG (2001). "Phylum AII. Euryarchaeota phy. nov.". in DR Boone. Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria (2nd ed.). New York: Springer Verlag. pp. 169. ISBN 978-0-387-98771-2. https://archive.org/details/bergeysmanualofs00boon/page/169.
- PubMed references for Thermococci
- PubMed Central references for Thermococci
- Google Scholar references for Thermococci
External links
- NCBI taxonomy page for Thermococci
- Search Tree of Life taxonomy pages for Thermococci
- Search Species2000 page for Thermococci
- MicrobeWiki page for Thermococci
- LPSN page for Thermococci
Wikidata ☰ Q1135978 entry
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