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Methermicoccus Shengliensis
Methanosarcinales is an order of Archaea in the class ''Methanomicrobia'', phylum ''Methanobacteriota''. The order ''Methanosarcinales'' contains both methanogenic and methanotrophic lineages, although the latter have so far no pure culture representatives. Methanotrophic lineages of the order ''Methanosarcinales'' were initially abbreviated as ANME (anaerobic methanotrophs) to distinguich from aerobic methanotrophic bacteria. Currently, those lineages receive their own names such as Ca. Methanoperedens, Ca. Methanocomedens (ANME-2a), Ca.Methanomarinus (ANME-2b), Ca. Methanogaster (ANME-2c), Ca. Methanovorans (ANME-3). The order contains archaeon with one of the largest genome, '' Methanosarcina acetivorans'' C2A, genome size 5,75 Mbp. The organisms placed within the order can be found in freshwater, saltwater, salt-rich sediments, anaerobic digestors, and animal digestive systems. The order consist of mesophiles or moderately thermophillic, neutrophilic or alkaliphilic species wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanosarcina Barkeri MS
''Methanosarcina'' is a genus of euryarchaeote archaea that produce methane. These single-celled organisms are known as anaerobic methanogens that produce methane using all three metabolic pathways for methanogenesis. They live in diverse environments where they can remain safe from the effects of oxygen, whether on the earth's surface, in groundwater, in deep sea vents, and in animal digestive tracts. ''Methanosarcina'' grow in colonies. The amino acid pyrrolysine was first discovered in a ''Methanosarcina'' species, '' M. barkeri''. Primitive versions of hemoglobin have been found in ''M. acetivorans'', suggesting the microbe or an ancestor of it may have played a crucial role in the evolution of life on Earth. Species of ''Methanosarcina'' are also noted for unusually large genomes. ''M. acetivorans'' has the largest known genome of any archaeon. According to a theory published in 2014, ''Methanosarcina'' may have been largely responsible for the largest extinction event ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudomurein
Pseudopeptidoglycan (also known as pseudomurein;White, David. (1995) ''The Physiology and Biochemistry of Prokaryotes'', pages 6, 12-21. (Oxford: Oxford University Press). . PPG hereafter) 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. Pseudopeptidoglycan, in general, is only present in a few methanogenic archaea. The basic components are ''N''-acetylglucosamine and ''N''-acetyltalosaminuronic acid (bacterial peptidoglycan containing ''N''-acetylmuramic acid instead), which are linked by β-1,3-glycosidic bonds. Lysozyme, a host defense mechanism present in human secretions (e.g. saliva and tears) breaks β-1,4-glycosidic bonds to degrade peptidoglycan. However, because pseudopeptidoglycan has β-1,3-glycosidic bonds, lysozyme is ineffective. It was thought from these large differences in cell wall chemistry that archaeal cell walls and bac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
