Korarqueotas

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Korarqueotas
Micrografía electrónica de varrido dun cultivo feito a partir dunha mostra obtida da Poza de Obsidiana de Yellowstone.
Micrografía electrónica de varrido dun cultivo feito a partir dunha mostra obtida da Poza de Obsidiana de Yellowstone.
Clasificación científica
Dominio: Archaea
Reino: Korarchaeota
Filo: 'Korarchaeota' Barns et al. 1996
species
Sinonimia
  • Korarchaeota Barns et al. 1996
  • Xenarchaea
  • Xenarchaeota

Os korarqueotas (Korarchaeota) son un filo de arqueas. [1] O nome procede do xénero principal do grupo Korarchaeum. Tamén se lles ten chamado Xenarchaea e Xenarchaeota.

Foron descubertas a partir de mostras de secuencias xenómicas de ARNr de 16S recollidas en ambientes naturais e non se puideron cultivar. As Korarchaeota só se atoparon en ambientes hidrotermais de altas temperaturas. Parece que se diversificaron a diferentes niveis filoxenéticos de acordo coa temperatura, salinidade das augas, e xeografía. [2] Son pouco abundantes na natureza. [2][3][4] Os procesos metabólicos de Korarchaeota, incluíndo como conseguen enerxía e obteñen o carbono, son descoñecidos. A análise das súas secuencias de ARNr de 16 S suxire que estas especies non forman parte dos dous principais grupos de arqueas, Crenarchaeota e Euryarchaeota [5]. Parece que son un grupo basal de arqueas, xa que teñen cracterísitcas tanto de Crenarchaeota coma de Euryarchaeota. O xenoma de Korarchaeum cryptofilum, que foi enriquecido a partir de cultivos mixtos, foi secuenciado e as súas características apoian a hipótese de que se ramificaron moi cedo do resto.[6].

Notas[editar | editar a fonte]

  1. See the NCBI webpage on Korarchaeota. Data extracted from the "NCBI taxonomy resources". National Center for Biotechnology Information. ftp://ftp.ncbi.nih.gov/pub/taxonomy/. Consultado o 2007-03-19.
  2. 2,0 2,1 Auchtung TA, Shyndriayeva G, Cavanaugh CM. (2011). "16S rRNA phylogenetic analysis and quantification of Korarchaeota indigenous to the hot springs of Kamchatka, Russia". Extremophiles 15 (1): 105–116. DOI:10.1007/s00792-010-0340-5. PMID 21153671.
  3. Reigstad LJ, Jorgensen SL, Schleper C (2010). "Diversity and abundance of Korarchaeota in terrestrial hot springs of Iceland and Kamchatka". ISME J 4 (3): 346–56. DOI:10.1038/ismej.2009.126. PMID 19956276.
  4. Auchtung Thomas A. (2007) Ecology of the hydrothermal candidate archaeal division, Korarchaeota. PhD thesis, Harvard University.
  5. Barns SM, Delwiche CF, Palmer JD, Pace NR. (August 1996). "Perspectives on archaeal diversity, thermophily and monophyly from environmental rRNA sequences". Proc. Natl. Acad. Sci. USA 93 (17): 9188–93. Bibcode 1996PNAS...93.9188B. DOI:10.1073/pnas.93.17.9188. PMC 38617. PMID 8799176. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=38617.
  6. Elkins JG, Podar M, Graham DE, Makarova KS, Wolf Y, Randau L, Hedlund BP, Brochier-Armanet C, Kunin V, Anderson I, Lapidus A, Goltsman E, Barry K, Koonin EV, Hugenholtz P, Kyrpides N, Wanner G, Richardson P, Keller M, Stetter KO. (July 2008). "A korarchaeal genome reveals insights into the evolution of the Archaea". Proc. Natl. Acad. Sci. USA 105 (1): 8805–6. Bibcode 2008PNAS..105.8102E. DOI:10.1073/pnas.0801980105. PMC 2430366. PMID 18535141. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2430366.

Véxase tamén[editar | editar a fonte]

Ligazóns externas[editar | editar a fonte]

Outras lecturas[editar | editar a fonte]

  • Stackebrandt, E; Frederiksen W, Garrity GM, Grimont PA, Kampfer P, Maiden MC, Nesme X, Rossello-Mora R, Swings J, Truper HG, Vauterin L, Ward AC, Whitman WB (2002). "Report of the ad hoc committee for the re-evaluation of the species definition in bacteriology". Int. J. Syst. Evol. Microbiol. 52 (Pt 3): 1043–1047. DOI:10.1099/ijs.0.02360-0. PMID 12054223.
  • Gurtler, V; Mayall BC (2001). "Genomic approaches to typing, taxonomy and evolution of bacterial isolates". Int. J. Syst. Evol. Microbiol. 51 (Pt 1): 3–16. PMID 11211268.
  • Dalevi, D; Hugenholtz P, Blackall LL (2001). "A multiple-outgroup approach to resolving division-level phylogenetic relationships using 16S rDNA data". Int. J. Syst. Evol. Microbiol. 51 (Pt 2): 385–391. PMID 11321083.
  • Keswani, J; Whitman WB (2001). "Relationship of 16S rRNA sequence similarity to DNA hybridization in prokaryotes". Int. J. Syst. Evol. Microbiol. 51 (Pt 2): 667–678. PMID 11321113.
  • Young, JM (2001). "Implications of alternative classifications and horizontal gene transfer for bacterial taxonomy". Int. J. Syst. Evol. Microbiol. 51 (Pt 3): 945–953. DOI:10.1099/00207713-51-3-945. PMID 11411719.
  • Christensen, H; Bisgaard M, Frederiksen W, Mutters R, Kuhnert P, Olsen JE (2001). "Is characterization of a single isolate sufficient for valid publication of a new genus or species? Proposal to modify recommendation 30b of the Bacteriological Code (1990 Revision)". Int. J. Syst. Evol. Microbiol. 51 (Pt 6): 2221–2225. DOI:10.1099/00207713-51-6-2221. PMID 11760965.
  • Christensen, H; Angen O, Mutters R, Olsen JE, Bisgaard M (2000). "DNA-DNA hybridization determined in micro-wells using covalent attachment of DNA". Int. J. Syst. Evol. Microbiol. 50: 1095–1102. DOI:10.1099/00207713-50-3-1095. PMID 10843050.
  • Xu, HX; Kawamura Y, Li N, Zhao L, Li TM, Li ZY, Shu S, Ezaki T (2000). "A rapid method for determining the G+C content of bacterial chromosomes by monitoring fluorescence intensity during DNA denaturation in a capillary tube". Int. J. Syst.Evol. Microbiol. 50: 1463–1469. DOI:10.1099/00207713-50-4-1463. PMID 10939651.
  • Young, JM (2000). "Suggestions for avoiding on-going confusion from the Bacteriological Code". Int. J. Syst. Evol. Microbiol. 50: 1687–1689. [No abstract available.. DOI:10.1099/00207713-50-4-1687. PMID 10939677.
  • Hansmann, S; Martin W (2000). "Phylogeny of 33 ribosomal and six other proteins encoded in an ancient gene cluster that is conserved across prokaryotic genomes: influence of excluding poorly alignable sites from analysis". Int. J. Syst. Evol. Microbiol. 50: 1655–1663. DOI:10.1099/00207713-50-4-1655. PMID 10939673.
  • Tindall, BJ (1999). "Proposal to change the Rule governing the designation of type strains deposited under culture collection numbers allocated for patent purposes". Int. J. Syst. Bacteriol. 49 (3): 1317–1319. DOI:10.1099/00207713-49-3-1317. PMID 10490293.
  • Tindall, BJ (1999). "Proposal to change Rule 18a, Rule 18f and Rule 30 to limit the retroactive consequences of changes accepted by the ICSB". Int. J. Syst. Bacteriol. 49 (3): 1321–1322. DOI:10.1099/00207713-49-3-1321. PMID 10425797.
  • Palys, T; Nakamura LK, Cohan FM (1997). "Discovery and classification of ecological diversity in the bacterial world: the role of DNA sequence data". Int. J. Syst. Bacteriol. 47 (4): 1145–1156. DOI:10.1099/00207713-47-4-1145. PMID 9336922.
  • Euzeby, JP (1997). "List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet". Int. J. Syst. Bacteriol. 47 (2): 590–592. DOI:10.1099/00207713-47-2-590. PMID 9103655.
  • Clayton, RA; Sutton G, Hinkle PS Jr, Bult C, Fields C (1995). "Intraspecific variation in small-subunit rRNA sequences in GenBank: why single sequences may not adequately represent prokaryotic taxa". Int. J. Syst. Bacteriol. 45 (3): 595–599. DOI:10.1099/00207713-45-3-595. PMID 8590690.
  • Murray, RG; Schleifer KH (1994). "Taxonomic notes: a proposal for recording the properties of putative taxa of procaryotes". Int. J. Syst. Bacteriol. 44 (1): 174–176. DOI:10.1099/00207713-44-1-174. PMID 8123559.
  • Winker, S; Woese CR (1991). "A definition of the domains Archaea, Bacteria and Eucarya in terms of small subunit ribosomal RNA characteristics". Syst. Appl. Microbiol. 14 (4): 305–310. PMID 11540071.
  • Achenbach-Richter, L; Woese CR (1988). "The ribosomal gene spacer region in archaebacteria". Syst. Appl. Microbiol. 10: 211–214. PMID 11542149.
  • McGill, TJ; Jurka J, Sobieski JM, Pickett MH, Woese CR, Fox GE (1986). "Characteristic archaebacterial 16S rRNA oligonucleotides". Syst. Appl. Microbiol. 7: 194–197. DOI:10.1016/S0723-2020(86)80005-4. PMID 11542064.