Deinococcus antarcticus sp. nov., isolated from soil
2015
Dong, Ning | Li, Hui-Rong | Yuan, Meng | Zhang, Xiao-Hua | Yu, Yong
A pink-pigmented, non-motile, coccoid bacterial strain, designated G3-6-20 ᵀ, was isolated from a soil sample collected in the Grove Mountains, East Antarctica. This strain was resistant to UV irradiation (810 J m ⁻²) and slightly more sensitive to desiccation as compared with Deinococcus radiodurans . Phylogenetic analyses based on the 16S rRNA gene sequence of the isolate indicated that the organism belongs to the genus Deinococcus . Highest sequence similarities were with Deinococcus ficus CC-FR2-10 ᵀ (93.5 %), Deinococcus xinjiangensis X-82 ᵀ (92.8 %), Deinococcus indicus Wt/1a ᵀ (92.5 %), Deinococcus daejeonensis MJ27 ᵀ (92.3 %), Deinococcus wulumuqiensis R-12 ᵀ (92.3 %), Deinococcus aquaticus PB314 ᵀ (92.2 %) and Deinococcus radiodurans DSM 20539 ᵀ (92.2 %). Major fatty acids were C ₁₈ : ₁ω7 c , summed feature 3 (C ₁₆ : ₁ω7 c and/or C ₁₆ : ₁ω6 c), anteiso-C ₁₅ : ₀ and C ₁₆ : ₀. The G+C content of the genomic DNA of strain G3-6-20 ᵀ was 63.1 mol%. Menaquinone 8 (MK-8) was the predominant respiratory quinone. Based on its phylogenetic position, and chemotaxonomic and phenotypic characteristics, strain G3-6-20 ᵀ represents a novel species of the genus Deinococcus , for which the name Deinococcus antarcticus sp. nov. is proposed. The type strain is G3-6-20 ᵀ (= DSM 27864 ᵀ = CCTCC AB 2013263 ᵀ).
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