title: Halopiger xanaduensis gen. nov., sp. nov., an extremely halophilic archaeon isolated from saline Lake Shangmatala in Inner Mongolia, China.
abstract: Strain SH-6(T) was isolated from the sediment of Lake Shangmatala, a saline lake in Inner Mongolia (China). Cells were pleomorphic. The organism was neutrophilic and required at least 2.5 M (15 %) NaCl, but not MgCl(2), for growth; optimal growth occurred at 4.3 M (25 %) NaCl. The G+C content of its DNA was 63.1 mol%. 16S rRNA gene sequence analysis revealed that strain SH-6(T) is a member of the family Halobacteriaceae, but there was a low level of similarity with other members of this family. Highest sequence similarity (94.6 %) was obtained with the 16S rRNA genes of the type strains of Natronolimnobius innermongolicus and Natronolimnobius baerhuensis. Polar lipid analyses revealed that strain SH-6(T) contains phosphatidylglycerol and phosphatidylglyceromethylphosphate, derived from both C(20)C(20) and C(20)C(25) glycerol diethers together with the glycolipid S(2)-DGD-1. On the basis of the data obtained, the new isolate could not be classified in any recognized genus. Strain SH-6(T) is thus considered to represent a novel species in a new genus within the family Halobacteriaceae, order Halobacteriales, for which the name Halopiger xanaduensis gen. nov., sp. nov. is proposed. The type strain of Halopiger xanaduensis is SH-6(T) (=CECT 7173(T)=CGMCC 1.6379(T)=JCM 14033(T)).
authors.affiliation: Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain.
authors.forename: M C
authors.initials: MC
authors.lastname: Gutiérrez
authors.affiliation: Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain.
authors.forename: A M
authors.initials: AM
authors.lastname: Castillo
authors.affiliation: Noda Institute for Scientific Research, 399 Noda, Noda-shi, Chiba-ken 278-0037, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kamekura
authors.affiliation: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100080 Beijing, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xue
authors.affiliation: State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100080 Beijing, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Department of Biotechnology, University of the Western Cape, Bellville 7535, Cape Town, South Africa.
authors.forename: D A
authors.initials: DA
authors.lastname: Cowan
authors.affiliation: Genencor International BV, Archimedesweg 30, 2333 CN Leiden, The Netherlands.
authors.forename: B E
authors.initials: BE
authors.lastname: Jones
authors.affiliation: Department of Infection, Immunity and Inflammation, University of Leicester, Leicester LE1 9HN, UK.
authors.forename: W D
authors.initials: WD
authors.lastname: Grant
authors.affiliation: Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Ventosa
mesh_terms: D001482:Base Composition; D002681:China; D019641:DNA, Archaeal / Q000737:chemistry / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry / Q000302:isolation & purification; D020459:Genes, rRNA; D019015:Geologic Sediments / Q000382:microbiology*; D006216:Halobacteriaceae / Q000737:chemistry / Q000145:classification* / Q000302:isolation & purification* / Q000502:physiology; D015636:Magnesium Chloride / Q000378:metabolism; D008858:Microscopy, Phase-Contrast; D008969:Molecular Sequence Data; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D019642:RNA, Archaeal / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012689:Sequence Homology, Nucleic Acid; D012965:Sodium Chloride / Q000378:metabolism
chemical_list: D019641:DNA, Archaeal; D004275:DNA, Ribosomal; D010743:Phospholipids; D019642:RNA, Archaeal; D012336:RNA, Ribosomal, 16S; D015636:Magnesium Chloride; D012965:Sodium Chloride