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  • Title: Deinococcus terrestris sp. nov., a gamma ray- and ultraviolet-resistant bacterium isolated from soil.
    Author: Wang JJ, Wu SG, Chen Q, Sheng DH, Du ZJ, Li YZ.
    Journal: Int J Syst Evol Microbiol; 2020 Sep; 70(9):4993-5000. PubMed ID: 32776869.
    Abstract:
    Strain SDU3-2T was isolated from a soil sample collected in Shandong Province, PR China. Cells of SDU3-2T were spherical, Gram-stain-positive, aerobic and non-motile. Cellular growth of the strain occurred at 25-45 °C, pH 5.5-8.5 and with 0-1.5 % (w/v) of NaCl. Phylogenetic analysis based on the 16S rRNA gene sequences showed that strain SDU3-2T was closest to the type strain Deinococcus murrayi ALT-1bT with a similarity of 95.2 %. The draft genome was 3.49 Mbp long with 69.2 mol% G+C content. Strain SDU3-2T exhibited high resistance to gamma radiation (D10 >12 kGy) and UV (D10 >900 J m-2). The strain encoded many genes for resistance to radiation and oxidative stress, which were highly conserved with other Deinococcus species, but possessed interspecific properties. The major fatty acids of SDU3-2T cells were C15 : 1  ω6c, C16 : 1  ω7c/C16 : 1  ω6c, and C17 : 1  ω8c, the major menaquinone was menaquinone-8, and the major polar lipids were an unidentified phosphoglycolipid, four unidentified glycolipids and an unidentified phospholipid. The average nucleotide identity and DNA-DNA hybridization results further indicated that strain SDU3-2T represents a new species in the genus Deinococcus, for which the name Deinococcus terrestris sp. nov. is proposed. The type strain is SDU3-2T (=CGMCC 1.17147T=KCTC 43098T).
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