Methanocaldococcus

Methanocaldococcus
Scientific classification Edit this classification
Domain:	Archaea
Kingdom:	Methanobacteriati
Phylum:	Methanobacteriota
Class:	Methanococci
Order:	Methanococcales
Family:	Methanocaldococcaceae
Genus:	Methanocaldococcus Whitman 2002
Type species
Methanocaldococcus jannaschii (Jones et al. 1984) Whitman 2002
Species
M. bathoardescens M. fervens M. indicus M. infernus M. jannaschii M. lauensis M. villosus M. vulcanius

Methanocaldococcus formerly known as Methanococcus is a genus of coccoid methanogen archaea. They are all thermophiles, including M. infernus 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 and it was the first archaean genome to be completely sequenced, revealing many novel and eukaryote-like elements.

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.

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.

Phylogeny

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

16S rRNA based LTP_06_2022	53 marker proteins based GTDB 10-RS226
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. fervens (Jeanthon et al. 1999) Whitman 2002 M. bathoardescens Stewart et al. 2015 M. lauensis L'Haridon et al. 2023 Methanocaldococcus	Methanocaldococcaceae M. villosus M. infernus M. lauensis L'Haridon et al. 2023 M. bathoardescens M. fervens M. jannaschii M. vulcanius Methanocaldococcus

See also

• List of Archaea genera
• Methanocaldococcus sp. FS406-22

External links

• Information on type species 'Methanocaldococcus jannaschii'
• Methanocaldococcus at BacDive - the Bacterial Diversity Metadatabase