• organisms
  • Currently these archaea could not be cultivated in the laboratory, only the genomes of these organisms could be assembled from the metagenomic sequences. (uni-ulm.de)
  • Archaea are particularly numerous in the oceans, and the archaea in plankton may be one of the most abundant groups of organisms on the planet. (wikipedia.org)
  • The word archaea comes from the Ancient Greek ἀρχαῖα, meaning "ancient things", as the first representatives of the domain Archaea were methanogens and it was assumed that their metabolism reflected Earth's primitive atmosphere and the organisms' antiquity. (wikipedia.org)
  • Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya is a paper published in 1990 in the Proceedings of the National Academy of Sciences of the United States of America. (wikipedia.org)
  • Archaea is a domain of organisms that are prokaryotic, single-celled, and are thought to have developed 4 billion years ago. (wikipedia.org)
  • prokaryotes
  • singular archaeon ) are prokaryotes , meaning they have no cell nucleus or any other membrane-bound organelles in their cells. (wikipedia.org)
  • Archaea were first classified as a separate group of prokaryotes in 1977 by Carl Woese and George E. Fox in phylogenetic trees based on the sequences of ribosomal RNA (rRNA) genes. (wikipedia.org)
  • This new appreciation of the importance and ubiquity of archaea came from using polymerase chain reaction (PCR) to detect prokaryotes from environmental samples (such as water or soil) by multiplying their ribosomal genes. (wikipedia.org)
  • Proteins
  • Anja Poehlein, Rolf Daniel, and Henning Seedorf, " The Draft Genome of the Non-Host-Associated Methanobrevibacter arboriphilus Strain DH1 Encodes a Large Repertoire of Adhesin-Like Proteins ," Archaea , vol. 2017, pp. 1-9, 2017. (hindawi.com)
  • temperatures
  • Methanogens are also used in biogas production and sewage treatment , and biotechnology exploits enzymes from extremophile archaea that can endure high temperatures and organic solvents . (wikipedia.org)
  • These results likely indicate that along with increasing GC pairing in the wobble position, thermophilic archaea have other mechanisms for stabilizing their DNA at such high temperatures. (wikipedia.org)
  • eukaryotes
  • Despite this morphological similarity to bacteria, archaea possess genes and several metabolic pathways that are more closely related to those of eukaryotes, notably the enzymes involved in transcription and translation . (wikipedia.org)
  • Archaea use more energy sources than eukaryotes: these range from organic compounds , such as sugars, to ammonia , metal ions or even hydrogen gas . (wikipedia.org)
  • however, archaea and eukaryotes lack peptidoglycan. (britannica.com)
  • However, both archaea and eukaryotes have multiple RNA polymerases that contain multiple polypeptides. (britannica.com)
  • 4. Protein synthesis: various features of protein synthesis in the archaea are similar to those of eukaryotes but not of bacteria. (britannica.com)
  • A prominent difference is that bacteria have an initiator tRNA (transfer RNA) that has a modified methionine , whereas eukaryotes and archaea have an initiator tRNA with an unmodified methionine. (britannica.com)
  • various types of metabolism exist in both archaea and bacteria that do not exist in eukaryotes, including nitrogen fixation , denitrification, chemolithotrophy, and hyperthermophilic growth. (britannica.com)
  • peptidoglycan
  • Therefore, the absence or presence of peptidoglycan is a distinguishing feature between the archaea and bacteria. (britannica.com)
  • Pseudopeptidoglycan (also known as pseudomurein) is a major cell wall component of some Archaea that differs from bacterial peptidoglycan in chemical structure, but resembles bacterial peptidoglycan in function and physical structure. (wikipedia.org)
  • Peptidoglycan Cell wall Methanochondroitin - another archaea cell wall type White, David. (wikipedia.org)
  • Initially
  • Initially people thought that archaea are 'freaks' living only at sites with extreme living conditions like f.i. hot geysers in Yellowstone National Park and Black Smokers at the bottom of the ocean. (uni-ulm.de)
  • Archaea were initially classified as bacteria , receiving the name archaebacteria (in the Archaebacteria kingdom), but this classification is outdated. (wikipedia.org)
  • PMID
  • Some archaea have a separate homocitrate synthase (AksA) which also synthesizes longer homocitrate analogs [ PMID: 9665716 ]. (ebi.ac.uk)
  • found
  • Classical photosynthesis using chlorophyll has not been found in any archaea. (britannica.com)
  • The S-layer, which is found in most Archaea, and in many bacteria, serves many crucial functions including protection from deleterious extracellular substances. (wikipedia.org)
  • features
  • The Archeon Tarot features a mix of traditional and non-traditional imagery in dream-like digital collage, inspired by the author's personal symbolism and mythology. (aeclectic.net)
  • List
  • The following is a list of the 3,030 articles that have cited the articles published in Archaea. (hindawi.com)
  • host
  • The museum also contains an arena, where reenactments of gladiator fights are held Archeon is host to several festivals such as the Midsummer Fair, the Midwinter Fair and the Roman Festival. (wikipedia.org)