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Halapricum hydrolyticum sp. nov., a beta-1,3-glucan utilizing haloarchaeon from hypersaline lakes
Sorokin, D.Y.; Elcheninov, A.G.; Merkel, A.Y.; Bale, N.; Sinninghe Damste, J.S.; Kublanov, I.V. (2023). Halapricum hydrolyticum sp. nov., a beta-1,3-glucan utilizing haloarchaeon from hypersaline lakes. Syst. Appl. Microbiol. 46(6): 126471.
In: Systematic and Applied Microbiology. Elsevier: Jena. ISSN 0723-2020; e-ISSN 1618-0984, meer
Peer reviewed article  

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Author keywords
    Hypersaline lakes; Haloarchaea; ß-1,3-glucans; Curdlan; Pachyman; Halapricum

Auteurs  Top 
  • Sorokin, D.Y.
  • Elcheninov, A.G.
  • Merkel, A.Y.
  • Bale, N., meer
  • Sinninghe Damste, J.S., meer
  • Kublanov, I.V.

    Two strains of neutrophilic haloaloarchaea were selectively enriched from hypersaline lakes in southwestern Siberia using β-1,3-glucans as a substrate. The strains were nearly identical in their phenotypes and according to phylogenomic analysis, and represent a distant novel species group in the genus Halapricum of the family Haloarculaceae. The main phenotypic property of the novel isolates is the ability to hydrolyze and grow with the polysaccharides curdlan and pachyman. Such potential has, to date, not been seen in any other haloarchaea in pure cultures. The strains are obligately aerobic saccharolytics. Apart from the insoluble β-1,3-glucans, they utilized soluble α-glucans (starch, pullulan and glycogen) and a limited number of sugars. The major ether-bound polar phospholipids include PGP-Me and PG. The glyco- and sulfolipids were absent. The major respiratory menaquinone is MK-8:8. On the basis of their unique physiological properties and the results of phylogenomic analysis, the isolates are suggested to be classified into a novel species Halapricum hydrolyticum sp. nov. (type strain HArc-curdl5-1T = DSM 114193T = UQM 41587T).

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