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Natranaeroarchaeum sulfidigenes gen. nov., sp. nov., carbohydrate-utilizing sulfur-respiring haloarchaeon from hypersaline soda lakes, a member of a new family Natronoarchaeaceae fam. nov. in the order Halobacteriales
Sorokin, D.Y.; Yakimov, M.; Messina, E.; Merkel, A.Y.; Koenen, M.; Bale, N.J.; Sinninghe Damsté, J.S. (2022). Natranaeroarchaeum sulfidigenes gen. nov., sp. nov., carbohydrate-utilizing sulfur-respiring haloarchaeon from hypersaline soda lakes, a member of a new family Natronoarchaeaceae fam. nov. in the order Halobacteriales. Syst. Appl. Microbiol. 45(6): 126356. https://dx.doi.org/10.1016/j.syapm.2022.126356
In: Systematic and Applied Microbiology. Elsevier: Jena. ISSN 0723-2020; e-ISSN 1618-0984, meer
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| Trefwoorden |
Natranaeroarchaeum; Natronoarchaeaceae
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| Author keywords |
Hypersaline soda lakes; Sulfur respiration; Alkaliphilic; Haloarchaea; Natranaeroarchaeum; Natronoarchaeaceae |
| Auteurs | | Top |
- Sorokin, D.Y.
- Yakimov, M.
- Messina, E.
- Merkel, A.Y.
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- Koenen, M., meer
- Bale, N.J., meer
- Sinninghe Damsté, J.S., meer
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| Abstract |
A pure culture of alkaliphilic haloarchaeon strain AArc-ST capable of anaerobic growth by carbohydrate-dependent sulfur respiration was obtained from hypersaline lakes in southwestern Siberia . According to phylogenetic analysis , AArc-ST formed a new genus level branch most related to the genus Natronoarchaeum in the order Halobacteriales . The strain is facultatively anaerobic with strictly respiratory metabolism growing either by anaerobic respiration with elemental sulfur and thiosulfate as the electron acceptors or by aerobic respiration at microoxic conditions. Thiosulfate is reduced partially to sulfide and sulfite. It is a first sulfur-reducing alkaliphilic haloarchaeon utilizing sugars, starch and glycerol as substrates for anaerobic growth. It is extremely halophilic (optimum at 3.5 M total Na+) and obligately alkaliphilic (optimum at pH 9.5). The dominant polar lipids include PG and PGP-Me with the archaeol (C20-C20) or extended archaeol (C20-C25) cores. The dominant respiratory lipoquinone is MK-8:8. On the basis of unique physiological properties and results of phylogenetic analysis, the soda lake isolate is suggested to beclassified into a novel genus and speciesNatranaeroarchaeum sulfidigenes gen. nov., sp. nov. (=JCM 34033 T = UNIQEM U1000T). Furthermore, on the bases of phylogenomic reconstruction, a new family Natronoarchaeaceae fam. nov. isproposed within the order Halobacteriales incorporatingNatranaeroarchaeum and three related genera: Natronoarchaeum, Salinarchaeum and Halostella.
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