Streptococcus chenjunshii sp. nov. isolated from feces of Tibetan antelopes

International Journal of Systematic and Evolutionary Microbiology
Zhi TianJianguo Xu

Abstract

Three Gram-stain-positive, catalase-negative, α-haemolytic, chain-forming and coccus-shaped microorganisms (strains Z15T, Z1 and Z2) were isolated from feces of Tibetan antelopes collected from the Qinghai-Tibet plateau, PR China. The results of 16S rRNA gene sequence studies indicated that Z15T shared 94.5, 93.1 and 92.2 % similarity with Streptococcus pantholopis DSM 102135T, Streptococcus ursoris NUM 1615T and Streptococcus dentapri NUM 1529T, respectively. rpoB and groEL-based sequence analysis of our three novel isolates revealed interspecies divergence of 16.7 and 14.3 % from Streptococcus pantholopis DSM 102135T. The genomic DNA G+C content of Z15T is 42.48 mol%. Z15T has an average nucleotide identity (ANI) value of 81.19 % with S. pantholopis DSM 102135T and a DNA-DNA relatedness value of less than 70 % in the in-silico DNA-DNA hybridization (isDDH) with other species of genus Streptococcus deposited in the GenBank database. A whole-genome phylogenetic tree based on 246 core genes of 78 genomes of members of the genus Streptococcusindicated that Z15T represents a member of genus Streptococcus but one well separated from the currently recognized species. Z15T contains C18 : 1ω7c (25.5 %), C18 : 1ω9c (19.6 %), C16 : 0 (1...Continue Reading

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Citations

Nov 2, 2019·International Journal of Systematic and Evolutionary Microbiology·Junqin LiJianguo Xu

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