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1 Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
2 College of Life Science, Beijing Normal University, Beijing 100875, PR China
3 China Center for Type Culture Collection, Wuhan University, Wuhan 430072, PR China
Correspondence
Min Lin
linmin57{at}vip.163.com
A Gram-positive, non-motile, spherical, red-pigmented and facultatively anaerobic bacterium, designated strain I-0T, was isolated from a sand sample of the Gobi desert in Xinjiang Autonomous Region, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that this isolate represents a novel member of the genus Deinococcus, with low sequence similarities (<94 %) to recognized Deinococcus species. The major cellular fatty acids were C16 : 1
7c and C16 : 0. Its polar lipid profile contained several unidentified glycolipids, phosphoglycolipids, phospholipids, pigments and an aminophospholipid. The peptidoglycan type was Orn–Gly2 (A3β) and the predominant respiratory quinone was MK-8. The DNA G+C content was 65.4 mol%. DNA–DNA relatedness between strain I-0T and Deinococcus radiodurans ACCC 10492T was 37 %. The strain was shown to be extremely resistant to gamma radiation (>15 kGy) and UV light (>600 J m–2). On the basis of the phylogenetic, chemotaxonomic and phenotypic data presented, strain I-0T represents a novel species of the genus Deinococcus, for which the name Deinococcus gobiensis sp. nov. is proposed. The type strain is I-0T (=DSM 21396T =CGMCC 1.7299T).
These authors contributed equally to this work. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain I-0T is EU427464.
Micrographs of colonies and cells of strain I-0T, a 16S rRNA gene sequence-based maximum-parsimony tree, the fatty acid profile of strain I-0T and a table of 16S rRNA gene sequence similarities to related strains are available as supplementary material with the online version of this paper.
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