| Euryarchaeota | |
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| Halobacterium sp. strain NRC-1, each cell about 5 µm in length. | |
Scientific classification 
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| Domain: | Archaea |
| Kingdom: | Euryarchaeota Woese, Kandler & Wheelis, 1990[1] |
| Phyla[2] | |
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| Synonyms | |
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Euryarchaeota (from Ancient Greek εὐρύς eurús, "broad, wide") is a kingdom of archaea.[3] Euryarchaeota are highly diverse and include methanogens, which produce methane and are often found in intestines; halobacteria, which survive extreme concentrations of salt; and some extremely thermophilic aerobes and anaerobes, which generally live at temperatures between 41 and 122 °C. They are separated from the other archaeans based mainly on rRNA sequences and their unique DNA polymerase.[4]
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Phylum Euryarchaeota I Domain Archaea I Microbiology I
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How To Say Euryarchaeota
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Phylum Crenarchaeota I Archaea I Microbiology I Domain Archaea I Archaeal Diversity
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Archaea (domain Archaea) | Extremophiles
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'Lec.6 Biological classification (Hindi) Methanogens| Thermoacidophiles| Halophiles|| NEET||AIIMS
Transcription
Description
The Euryarchaeota are diverse in appearance and metabolic properties. The phylum contains organisms of a variety of shapes, including both rods and cocci. Euryarchaeota may appear either gram-positive or gram-negative depending on whether pseudomurein is present in the cell wall.[5] Euryarchaeota also demonstrate diverse lifestyles, including methanogens, halophiles, sulfate-reducers, and extreme thermophiles in each.[5] Others live in the ocean, suspended with plankton and bacteria. Although these marine euryarchaeota are difficult to culture and study in a lab, genomic sequencing suggests that they are motile heterotrophs.[6]
Though it was previously thought that euryarchaeota only lived in extreme environments (in terms of temperature, salt content and/or pH), a paper by Korzhenkov et al published in January 2019 showed that euryarchaeota also live in moderate environments, such as low-temperature acidic environments. In some cases, euryarchaeota outnumbered the bacteria present.[7] Euryarchaeota have also been found in other moderate environments such as water springs, marshlands, soil and rhizospheres.[8] Some euryarchaeota are highly adaptable; an order called Halobacteriales are usually found in extremely salty and sulfur-rich environments but can also grow in salt concentrations as low as that of seawater 2.5%.[8] In rhizospheres, the presence of euryarchaeota seems to be dependent on that of mycorrhizal fungi; a higher fungal population was correlated with higher euryarchaeotal frequency and diversity, while absence of mycorrihizal fungi was correlated with absence of euryarchaeota.[8]
Phylogeny
The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[9] and National Center for Biotechnology Information (NCBI)[10]
| 16S rRNA based LTP_12_2021.[11][12][13] | Dombrowski et al. 2019,[14] Jordan et al. 2017[15] and Cavalier-Smith2020.[16] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Other phylogenetic analyzes have suggested that the archaea of the clade DPANN may also belong to Euryarchaeota and that they may even be a polyphyletic group occupying different phylogenetic positions within Euryarchaeota. It is also debated whether the phylum Altiarchaeota should be classified in DPANN or Euryarchaeota.[14] A cladogram summarizing this proposal is graphed below.[15][16] The groups marked in quotes are lineages assigned to DPANN, but phylogenetically separated from the rest.
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A third phylogeny, 53 marker proteins based GTDB 08-RS214.[17][18][19]
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Euryarchaeota s.s. |
See also
References
- ^ Woese CR, Kandler O, Wheelis ML (June 1990). "Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya". Proceedings of the National Academy of Sciences of the United States of America. 87 (12): 4576–9. Bibcode:1990PNAS...87.4576W. doi:10.1073/pnas.87.12.4576. PMC 54159. PMID 2112744.
- ^ Castelle CJ, Banfield JF (2018). "Major New Microbial Groups Expand Diversity and Alter our Understanding of the Tree of Life". Cell. 172 (6): 1181–1197. doi:10.1016/j.cell.2018.02.016. PMID 29522741.
- ^ Hogan CM (2010). E. Monosson, C. Cleveland (eds.). "Archaea". Encyclopedia of Earth. National Council for Science and the Environment. Retrieved 18 August 2017.
- ^ Lincoln SA, Wai B, Eppley JM, Church MJ, Summons RE, DeLong EF (July 2014). "Planktonic Euryarchaeota are a significant source of archaeal tetraether lipids in the ocean". Proceedings of the National Academy of Sciences of the United States of America. 111 (27): 9858–63. Bibcode:2014PNAS..111.9858L. doi:10.1073/pnas.1409439111. PMC 4103328. PMID 24946804.
- ^ a b Garrity GM, Holt JG (2015). "Euryarchaeota phy. nov.". In Whitman WB (ed.). Bergey's Manual of Systematics of Archaea and Bacteria. John Wiley & Sons. doi:10.1002/9781118960608. ISBN 9781118960608.
- ^ Iverson V, Morris RM, Frazar CD, Berthiaume CT, Morales RL, Armbrust EV (February 2012). "Untangling genomes from metagenomes: revealing an uncultured class of marine Euryarchaeota". Science. 335 (6068): 587–90. Bibcode:2012Sci...335..587I. doi:10.1126/science.1212665. PMID 22301318. S2CID 31381073.
- ^ Korzhenkov AA, Toshchakov SV, Bargiela R, Gibbard H, Ferrer M, Teplyuk AV, Jones DL, Kublanov IV, Golyshin PN, Golyshina OV (January 2019). "Archaea dominate the microbial community in an ecosystem with low-to-moderate temperature and extreme acidity". Microbiome. 7 (1): 11. doi:10.1186/s40168-019-0623-8. PMC 6350386. PMID 30691532.
- ^ a b c Bomberg M, Timonen S (October 2007). "Distribution of cren- and euryarchaeota in scots pine mycorrhizospheres and boreal forest humus". Microbial Ecology. 54 (3): 406–16. doi:10.1007/s00248-007-9232-3. PMID 17334967. S2CID 19425171.
- ^ Euzéby JP. "Euryarchaeota". List of Prokaryotic names with Standing in Nomenclature (LPSN). Archived from the original on 2017-08-09. Retrieved 2017-08-09.
- ^ Sayers; et al. "Euryarchaeota". Taxonomy Browser. National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2017-08-09.
- ^ "The LTP". Retrieved 23 February 2021.
- ^ "LTP_all tree in newick format". Retrieved 23 February 2021.
- ^ "LTP_12_2021 Release Notes" (PDF). Retrieved 23 February 2021.
- ^ a b Nina Dombrowski, Jun-Hoe Lee, Tom A Williams, Pierre Offre, Anja Spang (2019). Genomic diversity, lifestyles and evolutionary origins of DPANN archaea. Nature.
- ^ a b Jordan T. Bird, Brett J. Baker, Alexander J. Probst, Mircea Podar, Karen G. Lloyd (2017). Culture Independent Genomic Comparisons Reveal Environmental Adaptations for Altiarchaeales. Frontiers.
- ^ a b Cavalier-Smith, Thomas; Chao, Ema E-Yung (2020). "Multidomain ribosomal protein trees and the planctobacterial origin of neomura (Eukaryotes, archaebacteria)". Protoplasma. 257 (3): 621–753. doi:10.1007/s00709-019-01442-7. PMC 7203096. PMID 31900730.
- ^ "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 6 December 2021.
- ^ "ar53_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
- ^ "Taxon History". Genome Taxonomy Database. Retrieved 6 December 2021.
- ^ Anja Spang, Eva F. Caceres, Thijs J. G. Ettema: Genomic exploration of the diversity, ecology, and evolution of the archaeal domain of life. In: Science Volume 357 Issue 6351, eaaf3883, 11 Aug 2017, doi:10.1126/science.aaf3883
- ^ Sometines misspelled as Theinoarchaea: Catherine Badel, Gaël Erauso, Annika L. Gomez, Ryan Catchpole, Mathieu Gonnet, Jacques Oberto, Patrick Forterre, Violette Da Cunha: The global distribution and evolutionary history of the pT26‐2 archaeal plasmid family. In: environmental microbiology. sfam 10 Sep 2019. doi:10.1111/1462-2920.14800
- ^ NCBI: Candidatus Poseidoniia (class)
Further reading
- Cavalier-Smith T (January 2002). "The neomuran origin of archaebacteria, the negibacterial root of the universal tree and bacterial megaclassification". International Journal of Systematic and Evolutionary Microbiology. 52 (Pt 1): 7–76. doi:10.1099/00207713-52-1-7. PMID 11837318.
- Woese CR, Gupta R, Hahn CM, Zillig W, Tu J (1984). "The phylogenetic relationships of three sulfur dependent archaebacteria". Systematic and Applied Microbiology. 5: 97–105. doi:10.1016/S0723-2020(84)80054-5. PMID 11541975.
- Garrity GM, Holt JG (2001). "Phylum AII. Euryarchaeota phy. nov.". In DR Boone, RW Castenholz (eds.). 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.
External links
This page was last edited on 21 April 2024, at 20:26