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Natronosalvus hydrolyticus sp. nov., a beta-1,3-glucan utilizing natronoarchaeon from hypersaline soda lakes
Sorokin, D.Y.; Elcheninov, A.G.; Bale, N.; Sininghe Damsté, J. ; Kublanov, I.V. (2024). Natronosalvus hydrolyticus sp. nov., a beta-1,3-glucan utilizing natronoarchaeon from hypersaline soda lakes. Syst. Appl. Microbiol. 47(2-3): 126514. https://dx.doi.org/10.1016/j.syapm.2024.126514
In: Systematic and Applied Microbiology. Elsevier: Jena. ISSN 0723-2020; e-ISSN 1618-0984, more
Peer reviewed article  
Available in  Authors 
Author keywords
    Hypersaline soda lakes; Beta-1; 3-glucans; Curdlan Glycoside; hydrolase GH81; Natronosalvus
Authors  Top 
  • Sorokin, D.Y.
  • Elcheninov, A.G.
  • Bale, N., more
  • Sinninghe Damsté, J.S., more
  • Kublanov, I.V.
Abstract
    Use of curldlan, an insoluble β-1,3-glucan, as an enrichment substrate under aerobic conditions resulted in the selection from hypersaline soda lakes of a single natronarchaeon, strain AArc-curdl1. This organism is an obli?gately aerobic saccharolytic, possessing a poorly explored (in Archaea) potential to utilize beta-1–3 glucans, being only a second example of a haloarchaeon with this ability known in pure culture. The main phenotypic property of the isolate is the ability to grow with insoluble β-1,3-backboned glucans, i.e. curdlan and pachyman. Furthermore, the strain utilized starch family α-glucans, beta-fructan inulin and a limited spectrum of sugars. The major ether-bound membrane polar phospholipids included PGP-Me and PG. The glyco- and sulfolipids were absent. The major respiratory menaquinone is MK-8:8. According to phylogenomic analysis, AArc-curdl1 rep?resents a separate species in the recently described genus Natronosalvus within the family Natrialbaceae. The closest related species is Natronosalvus amylolyticus (ANI, AAI and DDH values of 90.2, 91.6 and 44 %, respec?tively). On the basis of its unique physiological properties and phylogenomic distance, strain AArc-curdl1T is classified as a novel species Natronosalvus hydrolyticus sp. nov. (=JCM 34865 = UQM 41566).
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