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Halapricum desulfuricans sp. nov., carbohydrate-utilizing, sulfur-respiring haloarchaea from hypersaline lakes
Sorokin, D.Y.; Yakimov, M.M.; Messina, E.; Merkel, A.Y.; Koenen, M.; Bale, N.J.; Sinninghe Damsté, J.S (2021). Halapricum desulfuricans sp. nov., carbohydrate-utilizing, sulfur-respiring haloarchaea from hypersaline lakes. Syst. Appl. Microbiol. 44(6): 126249. https://dx.doi.org/10.1016/j.syapm.2021.126249
In: Systematic and Applied Microbiology. Elsevier: Jena. ISSN 0723-2020; e-ISSN 1618-0984, meer
Peer reviewed article  
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Trefwoord
    Halapricum
Author keywords
    Hypersaline lakes; Haloarchaea; Anaerobic; Sulfur respiration; Carbohydrates; Halapricum
Auteurs  Top 
  • Sorokin, D.Y.
  • Yakimov, M.M.
  • Messina, E.
  • Merkel, A.Y.
  • Koenen, M., meer
  • Bale, N.J., meer
  • Sinninghe Damsté, J.S, meer
Abstract
    Nine pure cultures of neutrophilic haloaloarchaea capable of anaerobic growth by carbohydrate-dependent sulfur respiration were isolated from hypersaline lakes in southwestern Siberia and southern Russia. According to phylogenomic analysis the isolates were closely related to each other andformed a new species within the genus Halapricum (family Haloarculaceae). They have three types of catabolism: fermentative, resulting in H2 formation; anaerobic respiration using sulfur compounds as e-acceptors and aerobic respiration. Apart from elemental sulfur, all isolates can also use three different sulfoxides as acceptors and the type strain also grows with thiosulfate, reducing it partially to sulfide and sulfite. All strains utilized sugars and glycerol as the e-donors and C source for anaerobic growth and some can also grow with alpha-glucans, such as starch and dextrins. The major respiratory menaquinones are MK-8:8 and MK-8:7, but 5–19% consists of “thermoplasmata” quinones (MMK-8:8 and MMK-8:7), whose occurrence in haloarchaea is unprecedented. On the basis of their unique physiological properties and results of phylogenomic analysis, the isolates are suggested to be classified into a novel species Halapricum desulfuricans sp. nov.(type strain HSR12-2T = JCM 34032T = UNIQEM U1001 T).
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