Thermococci: Difference between revisions

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They live in extremely hot environments, such as [[hydrothermal vent]]s, and they have optimal growth temperatures above 80 °C. ''[[Thermococcus]]'' and ''[[Pyrococcus]]'' (literally "balls of fire") are both obligately [[anaerobic organism|anaerobic]] [[heterotrophs|chemoorganotrophs]].
They live in extremely hot environments, such as [[hydrothermal vent]]s, and they have optimal growth temperatures above 80 °C. ''[[Thermococcus]]'' and ''[[Pyrococcus]]'' (literally "balls of fire") are both obligately [[anaerobic organism|anaerobic]] [[heterotrophs|chemoorganotrophs]].


''Thermococcus'' prefers 70–95 °C and ''Pyrococcus'' 70-100 °C. ''[[Palaeococcus helgesonii]]'', recently discovered in the [[Tyrrhenian Sea]], is an [[aerobic organism|aerobic]] [[chemoheterotrophs|chemoheterotrophic]] that grows at temperatures of 45–85 °C with an optimal temperature of 80 °C.
''Thermococcus'' prefers 70–95 °C and ''Pyrococcus'' 70-100 °C. ''[[Palaeococcus helgesonii]]'', recently discovered in the [[Tyrrhenian Sea]], is an [[aerobic organism|aerobic]] [[chemoheterotrophs|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&nbsp;°C with an optimal temperaturearound 88&nbsp;°C with an optimal pH of 6. It has pronounced [[radioresistance]] and can survive [[gamma radiation]] at 30 kGy.<ref>{{cite news |title=Airspade |url=https://arboraeration.com/airspade/ |access-date=13 June 2023}}</ref>
''[[Thermococcus gammatolerans]]'' sp. nov. was recently discovered in the [[Guaymas Basin]], and it grows at temperatures from 55–95&nbsp;°C with an optimal temperaturearound 88&nbsp;°C with an optimal pH of 6. It has pronounced [[radioresistance]] and can survive [[gamma radiation]] at 30 kGy.<ref>{{cite news |title=Airspade |url=https://arboraeration.com/airspade/ |access-date=13 June 2023}}</ref>


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==References==
==References==
{{Reflist|1}}
{{Reflist}}


==Further reading==
==Further reading==
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* {{cite journal | last = Cavalier-Smith | first = T | date = 2002 | title = The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification | journal = Int. J. Syst. Evol. Microbiol. | volume = 52 | pages = 7–76 | pmid = 11837318 | issue = Pt 1 | doi=10.1099/00207713-52-1-7| doi-access = free }}
* {{cite journal | last = Cavalier-Smith | first = T | date = 2002 | title = The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification | journal = Int. J. Syst. Evol. Microbiol. | volume = 52 | pages = 7–76 | pmid = 11837318 | issue = Pt 1 | doi=10.1099/00207713-52-1-7| doi-access = free }}
*{{cite journal|last1=Marguet|first1=Evelyne|last2=Gaudin|first2=Marie|last3=Gauliard|first3=Emilie|last4=Fourquaux|first4=Isabelle|last5=le Blond du Plouy|first5=Stephane|last6=Matsui|first6=Ikuo|last7=Forterre|first7=Patrick|title=Membrane vesicles, nanopods and/or nanotubes produced by hyperthermophilic archaea of the genus Thermococcus|journal=Biochemical Society Transactions|date=2013|volume=41|issue=1|pages=436–442|doi=10.1042/BST20120293|pmid=23356325}}
*{{cite journal|last1=Marguet|first1=Evelyne|last2=Gaudin|first2=Marie|last3=Gauliard|first3=Emilie|last4=Fourquaux|first4=Isabelle|last5=le Blond du Plouy|first5=Stephane|last6=Matsui|first6=Ikuo|last7=Forterre|first7=Patrick|title=Membrane vesicles, nanopods and/or nanotubes produced by hyperthermophilic archaea of the genus Thermococcus|journal=Biochemical Society Transactions|date=2013|volume=41|issue=1|pages=436–442|doi=10.1042/BST20120293|pmid=23356325}}
* {{cite journal | last = Woese | first = CR |author2=Kandler O |author3=Wheelis ML | date = 1990 | title = Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya | journal = Proc. Natl. Acad. Sci. USA | volume = 87 | pages = 4576–4579 | pmid = 2112744 | doi = 10.1073/pnas.87.12.4576 | issue = 12 | pmc = 54159 | bibcode=1990PNAS...87.4576W| doi-access = free }}
* {{cite journal | last = Woese | first = CR |author2=Kandler O |author3=Wheelis ML | date = 1990 | title = Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya | journal = Proc. Natl. Acad. Sci. USA | volume = 87 | pages = 4576–4579 | pmid = 2112744 | doi = 10.1073/pnas.87.12.4576 | issue = 12 | pmc = 54159 | bibcode=1990PNAS...87.4576W| doi-access = free }}
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* {{cite book | author = Zillig W | author2 = Reysenbach AL | date = 2001 | chapter = Class IV (sic) [V]. Thermococci class. nov. | title = Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria | edition = 2nd | editor = DR Boone | editor2 = RW Castenholz | pages = [https://archive.org/details/bergeysmanualofs00boon/page/169 169] | publisher = Springer Verlag | location = New York | isbn = 978-0-387-98771-2 | url = https://archive.org/details/bergeysmanualofs00boon/page/169 }}
* {{cite book | author = Zillig W | author2 = Reysenbach AL | date = 2001 | chapter = Class IV (sic) [V]. Thermococci class. nov. | title = Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria | edition = 2nd | editor = DR Boone | editor2 = RW Castenholz | pages = [https://archive.org/details/bergeysmanualofs00boon/page/169 169] | publisher = Springer Verlag | location = New York | isbn = 978-0-387-98771-2 | url = https://archive.org/details/bergeysmanualofs00boon/page/169 }}
* {{cite book | author = Garrity GM | author2 = Holt JG | date = 2001 | chapter = Phylum AII. Euryarchaeota phy. nov. | title = Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria | edition = 2nd | editor = DR Boone | editor2 = RW Castenholz | pages = [https://archive.org/details/bergeysmanualofs00boon/page/169 169] | publisher = Springer Verlag | location = New York | isbn = 978-0-387-98771-2 | chapter-url = https://archive.org/details/bergeysmanualofs00boon/page/169 }}
* {{cite book | author = Garrity GM | author2 = Holt JG | date = 2001 | chapter = Phylum AII. Euryarchaeota phy. nov. | title = Bergey's Manual of Systematic Bacteriology Volume 1: The Archaea and the deeply branching and phototrophic Bacteria | edition = 2nd | editor = DR Boone | editor2 = RW Castenholz | pages = [https://archive.org/details/bergeysmanualofs00boon/page/169 169] | publisher = Springer Verlag | location = New York | isbn = 978-0-387-98771-2 | chapter-url = https://archive.org/details/bergeysmanualofs00boon/page/169 }}

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{{Taxonomic references|taxon=Thermococci}}

==External links==


{{Archaea classification}}
{{Archaea classification}}

Revision as of 16:17, 13 February 2024

Thermococci
Thermococcus gammatolerans
Scientific classification
Domain:
Kingdom:
Phylum:
Class:
Thermococci

Zillig and Reysenbach 2002
Order
Synonyms
  • "Methanofastidiosia" corrig. Nobu et al. 2016
  • Protoarchaea Cavalier-Smith 2002
  • "Thermococcia" Oren, Parte & Garrity 2016
Schematic diagram of the Thermococcus gammatolerans cell pictured above.
Pyrococcus furiosus

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

  1. ^ See the NCBI webpage on Thermococci. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
  2. ^ "Airspade". Retrieved 13 June 2023.

Further reading