Archaeoglobus
| Archaeoglobus | |
|---|---|
Scientific classification 
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| Domain: | Archaea |
| Kingdom: | Euryarchaeota |
| Class: | Archaeoglobi
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| Order: | Archaeoglobales
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| Family: | Archaeoglobaceae |
| Genus: | Archaeoglobus Stetter 1988 |
| Type species | |
Archaeoglobus fulgidus Stetter 1988
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Species
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Archaeoglobus is a genus of the phylum Euryarchaeota.[1] Archaeoglobus can be found in high-temperature oil fields where they may contribute to oil field souring.
Metabolism
Archaeoglobus grow anaerobically at extremely high temperatures between 60 and 95 °C, with optimal growth at 83 °C (ssp. A. fulgidus VC-16). with the oxidation of many different organic carbon sources, including complex polymers.
A. lithotrophicus live chemolitho-autotrophically from hydrogen, sulfate and carbon dioxide. Also A. profundus grow lithotrophically, but while this species needs acetate and CO2 for biosynthesis they are heterotroph.[3]
The complete A. fulgidus genome sequence revealed the presence of a nearly complete set of genes for methanogenesis. The function of these genes in A. fulgidus remains unknown, while the lack of the enzyme methyl-CoM reductase does not allow for methanogenesis to occur by a mechanism similar to that found in other methanogens.
Description and significance
Archaeoglobus members are hyperthermophiles that can be found in hydrothermal vents, oil deposits, and hot springs. They can produce biofilm when subjected to environmental stresses such as extreme pH or temperature, high concentrations of metal, or the addition of antibiotics, xenobiotics, or oxygen. These archaeons are known to cause the corrosion of iron and steel in oil and gas processing systems by producing iron sulphide. Their biofilms, however, may have industrial or research applications in the form of detoxifying metal contaminated samples or to gather metals in an economically recoverable form.
Genome structure
The Archaeoglobus fulgidus genome is a circular chromosome roughly half the size of E. coli at 2,178,000 base pairs. Although this is bacteria archaeoglobus can grow to the size of a quarter if fed properly. A quarter of the genome encodes preserved proteins whose functions are not yet determined, but are expressed in other archaeons such as
Comparative genomic studies on archaeal genomes provide evidence that members of the genus Archaeoglobus are the closest relatives of methanogenic archaea. This is supported by the presence of 10 conserved signature proteins that are uniquely found in all methanogens and Archaeoglobus. Additionally, 18 proteins which are uniquely found in members of
Ecology
Archaeoglobus species utilize their environment by acting as scavengers with many potential carbon sources. They can obtain carbon from fatty acids, the degradation of amino acids, aldehydes, organic acids, and possibly CO as well. Higher temperatures (approx. 83 °C) are ideal growth temperatures for Archaeoglobus, although a biofilm environment provides some environmental elasticity. Biofilm is composed of polysaccharides, proteins, and metals.
Medicine
Cells protected by biofilm are difficult to destroy using conventional anti-microbial therapy, which gives them medicinal possibilities.[2]
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).[1]
| 16S rRNA based | 53 marker proteins based GTDB 08-RS214[9][10][11] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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See also
References
- ^ a b Sayers; et al. "Archaeoglobaceae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2021-06-05.
- ^ doi:10.1038/37052
- ^ Gao, B. and Gupta, R. S. (2007). Phylogenomic analysis of proteins that are distinctive of Archaea and its main subgroups and the origin of methanogenesis. BMC Genomics. 8:86. doi:10.1186/1471-2164-8-86.
- ^ J.P. Euzéby. "Archaeoglobaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2021-11-17.
- ^ "The LTP". Retrieved 10 May 2023.
- ^ "LTP_all tree in newick format". Retrieved 10 May 2023.
- ^ "LTP_06_2022 Release Notes" (PDF). Retrieved 10 May 2023.
- ^ "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
- ^ "ar53_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
- ^ "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.
Further reading
Scientific journals
- Stetter, KO (1988). "Archaeoglobus fulgidus gen. nov., sp. nov. a new taxon of extremely thermophilic Archaebacteria". Syst. Appl. Microbiol. 10 (2): 172–173. .
Scientific books
- Madigan, M.T.; Martinko, J.M. (2005). Brock Biology of Microorganisms, 11th Ed. Pearson Prentice Hall.
- Huber H, Stetter KO (2001). "Family I. Archaeoglobaceae fam. nov. Stetter 1989, 2216". 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. ISBN 978-0-387-98771-2.
- Stetter, KO (1989). "Group II. Archaeobacterial sulfate reducers. Order Archaeoglobales". In JT Staley; MP Bryant; N Pfennig; JG Holt (eds.). Bergey's Manual of Systematic Bacteriology, Volume 3 (1st ed.). Baltimore: The Williams & Wilkins Co.