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- Volume 66, Issue 1
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f Halorubrum halodurans sp. nov., an extremely halophilic archaeon isolated from a hypersaline lake
- Authors: Paulina Corral1 , Rafael R. de la Haba1 , Cristina Sánchez-Porro1 , Mohammad Ali Amoozegar2 , R. Thane Papke3 , Antonio Ventosa1
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- VIEW AFFILIATIONS
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1 1 Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain 2 2 Department of Microbiology, Faculty of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran 3 3 Department of Molecular and Cell Biology, University of Connecticut, Storrs, CT 06269, USA
- Correspondence Antonio Ventosa [email protected]
- First Published Online: 01 January 2016, International Journal of Systematic and Evolutionary Microbiology 66: 435-444, doi: 10.1099/ijsem.0.000738
- Subject: NEW TAXA - Archaea
- Cover date:




Halorubrum halodurans sp. nov., an extremely halophilic archaeon isolated from a hypersaline lake, Page 1 of 1
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Two extremely halophilic archaea, strains Cb34T and C170, belonging to the genus Halorubrum, were isolated from the brine of the hypersaline lake Aran-Bidgol in Iran. Cells of the two strains were motile, pleomorphic rods, stained Gram-variable and produced red-pigmented colonies. Strains Cb34T and C170 required 25 % (w/v) salts, pH 7.0 and 37 °C for optimal growth under aerobic conditions; 0.3 M Mg2+ was required. Cells of both isolates were lysed in distilled water and hypotonic treatment with < 10 % NaCl provoked cell lysis. Phylogenetic analysis based on 16S rRNA gene sequence similarities showed that these two strains were closely related to Halorubrum cibi B31T (98.8 %) and other members of the genus Halorubrum. In addition, studies based on the rpoB′ gene revealed that strains Cb34T and C170 are placed among the species of Halorubrum and are closely related to Halorubrum cibi B31T, with rpoB′ gene sequence similarity less than or equal to 95.7 %. The polar lipid patterns of both strains consisted of phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and sulfated mannosyl glucosyl diether. The DNA G+C content was 62.1–62.4 mol%. DNA–DNA hybridization studies confirmed that strains Cb34T and C170 constitute a distinct species. Data obtained in this study show that the two strains represent a novel species, for which the name Halorubrum halodurans sp. nov. is proposed. The type strain is Cb34T ( = CECT 8745T = IBRC-M 10233T).
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The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA and rpoB′ gene sequences of strain Cb34T are HG421007 and KJ152360, respectively.
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Two supplementary figures are available with the online Supplementary Material.
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Abbreviations: DDH DNA–DNA hybridization PG phosphatidylglycerol PGP-Me phosphatidylglycerol phosphate methyl ester PGS phosphatidylglycerol sulfate S-DGD sulfated mannosyl glucosyl diether.
© 2015 IUMS | Published by the Microbiology Society
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