Archaea

(redirected from Archaeal)
Also found in: Dictionary, Encyclopedia.

Archaea

Evolutionary biology
One of the three domains of living organisms: Archaea, Bacteria and Eukaryota. While Archaea are single-celled, they are unlike bacteria given their independent evolutionary history. Archaea differ from Eukaryota in their ribosomal structure and the presence—in some—of introns in the genome, as well as other features (e.g., different membrane composition).
 
Molecular biology
Archaea are of interest in biotechnology as they have unique biochemical features (e.g., enzymes of theromophiles, such as Taq polymerase, the “workhorse” enzyme of PCR) and are extremely stable at high temperatures. Archaea include metabolic oddities (e.g., extreme halophiles, which live in extremely salty environments), methanogens (which produce methane) and sulphur-dependant extreme thermophiles (which can live in extremely hot environments).

Archaea phyla
• Crenarchaeota
• Euryarchaeota
• Korarchaeota
• Nanoarchaeota
• Thaumarchaeota (recently proposed)

Archaea

( formerly
References in periodicals archive ?
1]) but the copy number of archaeal genes peaked in the 'light' fractions (1.
In addition, Cersosimo et al [73] analyzed the composition of ruminal methanogens using 454 pyrosequencing of archaeal 16S rRNA gene amplicons generated from a pair of primers specific for methanogens, while Fouts et al [74] investigated the ruminal fungal diversity using a fungal-specific 18S rRNA primer pair (Table 3).
With the identification and phylogenetic analysis of the first prokaryotic aquaporins, it became clear that the eukaryotic aquaporin superfamily was also rooted within the archaeal and bacterial domains (Pao et al.
Change in bacterial and archaeal assemblages in an equatorial river induced by the water eutrophication of Petit Saut dam reservoir (French Guiana).
Chlorite dismutases (Cld) are bacterial and archaeal enzymes that catalyze the decomposition of chlorite (Cl[O.
After a career spent researching the flagellar motor of Salmonella typhimurium and other related species, Shin-Ichi Aizawa was left with thousands of electron microscope images of eubacteria and archaeal species.
Archaeo-somes are liposomes made of polar lipids obtained from archaeal (archaebacterial) cells.
New processes and players in the nitrogen cycle: the microbial ecology of anaerobic and archaeal ammonia oxidation.
Hanage, "Horizontal gene transfer and the evolution of bacterial and archaeal population structure," Trends in Genetics, vol.
Another 29 reviews consider such topics as mechanisms of acid resistance in Escherichia coli, microbial contributions to phosphorus cycling in eutrophic lakes and wastewater, wall teichoic acids of Gram-positive bacteria, biological consequences and advantages of asymmetric bacterial growth, prions and the potential transmissibility of protein misfolding diseases, and the wonderful world of archaeal viruses.
Horizontal gene transfer in bacterial and archaeal complete genomes.
Temporal changes in abundance and composition of ammonia-oxidizing bacterial and archaeal communities in a drained peat soil in relation to [N.