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In taxonomy, the Methanosarcinaceae are a family of the Methanosarcinales.

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)

Biochemistry

A notable trait of Methanosarcinaceae is that they are methanogens that incorporate the unusual amino acid pyrrolysine into their enzymes. The enzyme monomethylamine methyltransferase catalyzes the reaction of monomethylamine to methane. This enzyme includes pyrrolysine. The unusual amino acid is inserted using a unique tRNA, the anticodon of which is UAG. In most organisms, and in most Methanosarcinaceae proteins, UAG is a stop codon. However in this enzyme, and anywhere else pyrrolysine is incorporated, likely through contextual markers on the mRNA, the pyrrolysine-loaded tRNA is inserted instead of the release factor. They also have a unique aminoacyl-tRNA synthetase to specifically load this tRNA with pyrrolysine. This unique adaptation is still the subject of significant study.

See also

• List of Archaea genera

References

1. ^ Sayers; et al. "Methanosarcinaceae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-06-05.
2. J.P. Euzéby. "Methanosarcinaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2021-11-17.
3. "The LTP". Retrieved 23 February 2022.
4. "LTP_all tree in newick format". Retrieved 23 February 2022.
5. "LTP_01_2022 Release Notes" (PDF). Retrieved 23 February 2022.
6. "GTDB release 09-RS220". Genome Taxonomy Database. Retrieved 10 May 2024.
7. "ar53_r220.sp_label". Genome Taxonomy Database. Retrieved 10 May 2024.
8. "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2024.
9. Lehninger A, Nelson D, Cox M. Lehninger principles of biochemistry. 6th ed. New York: W.H. Freeman; 2013 p. 1124-1126.

Further reading

Scientific journals

• 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.
• Springer E; Sachs MS; Woese CR; Boone DR (1995). "Partial gene sequences for the A subunit of methyl-coenzyme M reductase (mcrI) as a phylogenetic tool for the family Methanosarcinaceae". Int. J. Syst. Bacteriol. 45 (3): 554–559. doi:10.1099/00207713-45-3-554. PMID 8590683.
• Cavalier-Smith, T (1986). "The kingdoms of organisms". Nature. 324 (6096): 416–417. Bibcode:1986Natur.324..416C. doi:10.1038/324416a0. PMID 2431320. S2CID 5242667.
• Sowers KR; Johnson JL; Ferry JG (1984). "Phylogenic relationships among the methylotrophic methane-producing bacteria and emendation of the family Methanosarcinaceae". Int. J. Syst. Bacteriol. 34 (4): 444–450. doi:10.1099/00207713-34-4-444.
• Balch WE; Fox GE; Magrum LJ; Woses CR; et al. (1979). "Methanogens: reevaluation of a unique biological group". Microbiol. Rev. 43 (2): 260–296. doi:10.1128/MMBR.43.2.260-296.1979. PMC 281474. PMID 390357.

Scientific books

• Boone DR; Whitman WB; Koga Y (2001). "Order III. Methanosarcinales ord. 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.
• Grant WD; Kamekura M; McGenity TJ; Ventosa A (2001). "Class III. Halobacteria class. 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

• Archaea taxonomic families
• Euryarchaeota