Department of Zoology, University of Delhi, Delhi-110007, India.
Molecular Biology and Genomics Research Laboratory, Ramjas College, University of Delhi, Delhi-110007, India.
Int J Syst Evol Microbiol. 2021 Jul;71(7). doi: 10.1099/ijsem.0.004879.
species are widely studied due to their utility in bioremediation of sites contaminated with radioactive elements. In the present study, we re-evaluated the taxonomic placement of two species of the genus namely DY59 and ATCC 19172 based on whole genome analyses. The 16S rRNA gene analysis revealed a 99.58% sequence similarity between this species pair that is above the recommended threshold value for species delineation. These two species also clustered together in both the 16S rRNA gene and core genome based phylogenies depicting their close relatedness. Furthermore, more than 98% of genes were shared between s DY59 and ATCC 19172. Interestingly, DY59 and ATCC 19172 shared high genome similarity in different genomic indices. They displayed an average nucleotide identity value of 97.63%, an average amino acid identity value of 97% and a digital DNA-DNA hybridization value equal to 79.50%, all of which are well above the cut-off for species delineation. Altogether, based on these evidences, DY59 and ATCC 19172 constitute a single species. Hence, as per the priority of publication, we propose that Lee 2015 should be reclassified as a later heterotypic synonym of .
由于其在放射性元素污染场地生物修复中的应用，该属的两个种（即 DY59 和 ATCC 19172）被广泛研究。在本研究中，我们基于全基因组分析重新评估了这两个种的分类地位。16S rRNA 基因分析表明，这一对种之间的序列相似度为 99.58%，高于推荐的种划分阈值。这两个种在 16S rRNA 基因和核心基因组的系统发育树中也聚在一起，表明它们密切相关。此外，s DY59 和 ATCC 19172 之间有超过 98%的基因共享。有趣的是，DY59 和 ATCC 19172 在不同的基因组指标中具有高度相似的基因组。它们的平均核苷酸同一性值为 97.63%，平均氨基酸同一性值为 97%，数字 DNA-DNA 杂交值为 79.50%，所有这些都远高于种划分的截止值。总之，基于这些证据，DY59 和 ATCC 19172 构成了一个单一的种。因此，根据优先出版原则，我们建议将 Lee 2015 重新分类为的后验同型同义词。
