Methanocaldococcus

Methanocaldococcus formerly known as Methanococcus is a genus of coccoid methanogen archaea.[1] They are all mesophiles, except the thermophilic M. thermolithotrophicus and the hyperthermophilic M. jannaschii. The latter was discovered at the base of a “white smoker” chimney at 21°N on the East Pacific Rise[2] and it was the first archaean genome to be completely sequenced, revealing many novel and eukaryote-like elements.[3]

Methanocaldococcus
Scientific classification
Domain:
Archaea
Kingdom:
Euryarchaeota
Phylum:
Euryarchaeota
Class:
Methanococci
Order:
Methanococcales
Family:
Methanocaldococcaceae
Genus:
Methanocaldococcus

Whitman 2002
Type species
Methanocaldococcus jannaschii
(Jones et al. 1984) Whitman 2002
Species

Nomenclature

The name Methanocaldococcus has Latin and Greek roots, methano for methane, caldo for hot, and the Greek kokkos for the spherical shape of the cells. Overall, the name means spherical cell that produces methane at hot temperatures.[4]

Metabolism

All species in Methanocaldococcus are obligate methanogens. They use hydrogen to reduce carbon dioxide. Unlike many other species within Euryarchaeota, they cannot use formate, acetate, methanol or methylamines as substrates.[4]

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) [5] and National Center for Biotechnology Information (NCBI).[6]

16S rRNA based LTP_06_2022[7][8][9] 53 marker proteins based GTDB 08-RS214[10][11][12]
Methanocaldococcaceae

M. villosus Bellack et al. 2011

M. indicus L'Haridon et al. 2003

M. infernus (Jeanthon et al. 1998) Whitman 2002

M. vulcanius (Jeanthon et al. 1999) Whitman 2002

M. jannaschii (Jones et al. 1984) Whitman 2002 (type sp.)

M. bathoardescens Stewart et al. 2015

M. fervens (Jeanthon et al. 1999) Whitman 2002

Methanocaldococcus
Methanocaldococcaceae

M. villosus

M. infernus

M. fervens

M. bathoardescens

M. jannaschii

M. vulcanius

Methanocaldococcus

See also

References
  1. See the NCBI webpage on Methanocaldococcus. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. Retrieved 2007-03-19.
  2. W.J. Jones; et al. (December 1983). "Methanococcus jannaschii sp. nov., an extremely thermophilic methanogen from a submarine hydrothermal vent". Arch. Microbiol. 136 (4): 254–261. doi:10.1007/BF00425213. S2CID 33277659.
  3. C.J. Bult; et al. (August 1996). "Complete genome sequence of the methanogenic archaeon, Methanococcus jannaschii". Science. 273 (5278): 1058–1073. Bibcode:1996Sci...273.1058B. doi:10.1126/science.273.5278.1058. PMID 8688087. S2CID 41481616.
  4. David R. Boone; Richard W. Castenholz, eds. (2012-01-13). Bergey's Manual of Systematic Bacteriology. Vol. 1 (2 ed.). Nueva York: Springer Science and Business Media. p. 243. doi:10.1007/978-0-387-21609-6. ISBN 978-1-4419-3159-7. S2CID 41426624. Retrieved 2016-07-27.
  5. J.P. Euzéby. "Methanococcales". List of Prokaryotic names with Standing in Nomenclature (LPSN). Archived from the original on 2013-01-27. Retrieved 2011-11-17.
  6. Sayers; et al. "Methanococcales". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2011-06-05.
  7. "The LTP". Retrieved 10 May 2023.
  8. "LTP_all tree in newick format". Retrieved 10 May 2023.
  9. "LTP_06_2022 Release Notes" (PDF). Retrieved 10 May 2023.
  10. "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
  11. "ar53_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
  12. "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.

Further reading

Scientific books

Scientific databases
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