Abstract
A novel facultative anaerobic, Gram-stain-negative coccus, designated strain ChDC B345T, was isolated from human pericoronitis lesion and was characterized by polyphasic taxonomic analysis. The 16S ribosomal RNA gene (16S rDNA) sequence revealed that the strain belonged to the genus Streptococcus. The 16S rDNA sequence of strain ChDC B345T was most closely related to those of Streptococcus mitis NCTC 12261T (99.5%) and Streptococcus pseudopneumoniae ATCC BAA-960T (99.5%). Complete genome of strain ChDC B345T was 1,972,471 bp in length and the G + C content was 40.2 mol%. Average nucleotide identity values between strain ChDC B345T and S. pseudopneumoniae ATCC BAA-960T or S. mitis NCTC 12261T were 92.17% and 93.63%, respectively. Genome-to-genome distance values between strain ChDC B345T and S. pseudopneumoniae ATCC BAA-960T or S. mitis NCTC 12261T were 47.8% (45.2–50.4%) and 53.0% (51.0–56.4%), respectively. Based on these results, strain ChDC B345T (= KCOM 1679T = JCM 33299T) should be classified as a novel species of genus Streptococcus, for which we propose the name Streptococcus gwangjuense sp. nov.
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Acknowledgments
This research was supported by the Bio & Medical Technology Development Program of the National Research Foundation (NRF) funded by the Ministry of Science and ICT (Grant No. 2017M3A9B8065844) and in part by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (Grant No. 2018R1A2B5002239).
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DPD Number: TA00862.
GenBank accession number of 16S rRNA gene for strain ChDC B345T: KF733672.
GenBank accession number of genome for strain ChDC B345T: CP032620.
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284_2019_1687_MOESM2_ESM.pptx
Supplementary material 2—Maximum likelihood (a) and the minimum evolution (b) phylogenetic tree based on 16S rDNA of strain ChDC B345T and type strains of related species. All 16S rDNAs of the strains used in this study were downloaded from GenBank. Stability of phylogenetic trees was assessed using a bootstrap analysis of 1,000 replicates with MEGA version 6.06 [19]. Bars indicate 0.01 (a) or 0.005 (b) changes per nucleotide position (PPTX 95 kb)
284_2019_1687_MOESM3_ESM.pptx
Supplementary material 3—Neighbor-joining phylogenetic tree based on DNA gyrase subunit B gene (gyrB) (a) and RNA polymerase beta-subunit gene (rpoB) (b) of strain ChDC B345T and type strains of related species. The stability of the trees was assessed using bootstrap analysis of 1000 replicates with MEGA version 6.06 [19]. Bars indicate 0.1 (a) or 0.02 (b) changes per nucleotide position (PPTX 97 kb)
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Park, SN., Lim, Y.K., Shin, J.H. et al. Streptococcus gwangjuense sp. nov., Isolated from Human Pericoronitis. Curr Microbiol 76, 799–803 (2019). https://doi.org/10.1007/s00284-019-01687-8
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DOI: https://doi.org/10.1007/s00284-019-01687-8