Title: Archaea - an overview | ScienceDirect Topics
Headings: Archaea
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Gastrointestinal Microbiota
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Content: Helicases of superfamilies 1 (SF1) and 2 (SF2) have been shown to be of major importance in RNA and DNA metabolism in Eukarya and in Bacteria. In Archaea, the cellular functions of these enzymes remain dispersed and only few members were characterized. In this chapter, we review our knowledge on the archaeal SF1 and SF2 helicases. We focus on phylogenomic studies that revealed archaeal helicase families and give insights into their respective biochemical and structural properties. Finally, we raise the question of the mode of actions of these helicases in archaeal DNA and RNA metabolism. View chapter Purchase book
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URL: https://www.sciencedirect.com/science/article/pii/B9780128146859000014
Gastrointestinal Microbiota
Jan S. Suchodolski, in Canine and Feline Gastroenterology, 2013
Archaea
Archaea are single-celled microorganisms with structure similar to bacteria. They are evolutionarily distinct from bacteria and eukaryotes and form the third domain of life. Archaea are obligate anaerobes living in environments low in oxygen (e.g., water, soil). Archaea are commensal in the intestine of ruminants and have recently been described in the human intestine, with Methanobacteriales most commonly reported.