Scholarlink

<p>This study aims to clarify the taxonomic relationship between <i>Saccharothrix yanglingensis</i> and <i>Saccharothrix longispora</i>. The 16S rRNA gene sequence similarity between <i>S. yanglingensis</i> Hhs.015<sup>&#xa0;T</sup> and <i>S. longispora</i> DSM 43749<sup>&#xa0;T</sup> was 99.3%, which exceeds the threshold of 98.6% that is commonly used for bacterial species delineation. Moreover, genome-based comparisons revealed high levels of genetic relatedness, with Average Nucleotide Identity (ANI) and Average Amino acid Identity (AAI) values exceeding 97% and a digital DNA–DNA Hybridization (dDDH) value of 75.1%, all surpassing the respective thresholds for species delineation (95–96% for ANI and AAI, and 70% for dDDH). Phenotypic analyses further supported these findings, highlighting shared morphological and physiological traits alongside subtle differences in metabolic capabilities. Based on these genomic and phenotypic data, we propose the reclassification of <i>Saccharothrix yanglingensis</i> Yan et al. 2025 and <i>Saccharothrix longispora</i> (Preobrazhenskaya and Sveshnikova 1974) Grund and Kroppenstedt 1990, with both strains recognized as distinct subspecies within the same species.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Whole-Genome-Based Reassessment of Saccharothrix Phylogeny, with the Proposal of Two New Subspecies: Saccharothrix longispora subsp. Longispora subsp. nov. and Saccharothrix longispora subsp. Yanglingensis subsp. nov., comb. nov

  • 期刊论文

  • 发表日期：

    2025年7月8日

查看全文
  • Guendouz Dif,
  • Nadjette Djemouai,
  • Noureddine Bouras,
  • Atika Meklat,
  • Abdelghani Zitouni

摘要

This study aims to clarify the taxonomic relationship between Saccharothrix yanglingensis and Saccharothrix longispora. The 16S rRNA gene sequence similarity between S. yanglingensis Hhs.015 T and S. longispora DSM 43749 T was 99.3%, which exceeds the threshold of 98.6% that is commonly used for bacterial species delineation. Moreover, genome-based comparisons revealed high levels of genetic relatedness, with Average Nucleotide Identity (ANI) and Average Amino acid Identity (AAI) values exceeding 97% and a digital DNA–DNA Hybridization (dDDH) value of 75.1%, all surpassing the respective thresholds for species delineation (95–96% for ANI and AAI, and 70% for dDDH). Phenotypic analyses further supported these findings, highlighting shared morphological and physiological traits alongside subtle differences in metabolic capabilities. Based on these genomic and phenotypic data, we propose the reclassification of Saccharothrix yanglingensis Yan et al. 2025 and Saccharothrix longispora (Preobrazhenskaya and Sveshnikova 1974) Grund and Kroppenstedt 1990, with both strains recognized as distinct subspecies within the same species.