Methanonatronarchaeum

Abstract

Me.tha.no.na.tron.ar.chae’um N.L. neut. n. methanum methane; N.L. pref. methano- pertaining to methane; N.L. n. natron, arbitrarily derived from the Arabic n. natrun natron, soda; N.L. neut. n. archaeum pertaining
to archaios, -e, -on ancient; N.L. neut. n. Methanonatronarchaeum a soda-loving archaeon forming methane. The genus Methanonatronarchaeum includes obligately
anaerobic, extremely haloalkaliphilic, and moderately thermophilic methanogens with small coccoid cells of 0.4–0.5 μm producing methane by reduction of C1-methylated compounds using either H2 or formate as external electron donors. Yeast extract or acetate is required as C-source. Cells accumulate intracellular potassium as a compatible solute. Core membrane lipids are dominated by archaeol (diphytanyl glycerol ether, DGE) and glycerol diphytanyl glycerol tetraether (GDGT-0). The habitat is hypersaline
soda lakes. The genus consists of a single species M. thermophilum, which is the type species. A member of the class Methanonatronarchaeia within a newly proposed
phylum Halobacteriota (formerly part of Euryarchaeota). DNA G+C content (mol%): 37.9 (genome of the type strain). Type species: Methanonatronarchaeum thermophilum
Sorokin, Merkel, Abbas, Makarova, Rijpstra, et al. 2018, 2206VP.
...............