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sp. nov.,从冷藏牛肉中分离得到。

sp. nov., isolated from refrigerated beef.

机构信息

Max Rubner-Institut, Federal Research Institute for Nutrition and Food, Department of Safety and Quality of Meat, E.-C.-Baumann-Straße 20, D-95326 Kulmbach, Germany.

Center for Biotechnology - CeBiTec, Universitätsstraße 27, D-33615 Bielefeld, Germany.

出版信息

Int J Syst Evol Microbiol. 2021 Feb;71(2). doi: 10.1099/ijsem.0.004652.

Abstract

During a project focusing on the diversity of meat microbiota associated with beef ripening, a strain was isolated exhibiting high 16S rRNA gene sequence similarities (>99 %) to DSM 107652, DSM 29167, DSM 29164 and DSM 18862. Phylogenetic analysis of the complete gene sequences of the isolate V5/DAB/2/5 indicated a separate branch with about 99.0 % nucleotide identities to the closest relatives DSM 107652, DSM 29167 and DSM 29164, while average nucleotide identities (ANIb) calculated from the draft genomes were 94.8, 94.2 and 90.2 %, respectively. Pairwise genome-to-genome distance calculations (GGDC) resulted in values of 67.7, 63.5 and 45.7 %, respectively, lying below the actual species demarcation line as well. A second isolate, UBT403, was detected some years later by using matrix-assisted laser desorption ionization-time of flight MS of the microbiota of minced beef. The fatty acid profile of V5/DAB/2/5 consisted of C, summed feature C 7/iso-C 2-OH, C c, C cyclo, C, C 3-OH, C 3-OH and C 2-OH. The major cellular lipids were aminopholipids, phospholipids, phosphatidylethanolamine and phosphatidylglycerol; the major quinone was Q9 with a minor proportion of Q8. Based on phenotypic and chemotaxonomic characterizations, the isolates can be considered as representing a novel species, for which the name sp. nov. is proposed. The type strain is V5/DAB/2/5 (=DSM 111363=LMG 31846); a second strain is UBT403 (=DSM 111362=LMG 31847).

摘要

在一个专注于与牛肉成熟相关的肉菌群多样性的项目中,分离到一株菌株,其 16S rRNA 基因序列相似性(>99%)非常高,与 DSM 107652、DSM 29167、DSM 29164 和 DSM 18862 相似。对分离株 V5/DAB/2/5 的全 基因序列的系统发育分析表明,与最接近的亲缘关系 DSM 107652、DSM 29167 和 DSM 29164 相比,它属于一个单独的分支,核苷酸同一性约为 99.0%,而从草图基因组计算得出的平均核苷酸同一性(ANIb)分别为 94.8%、94.2%和 90.2%。两两基因组到基因组距离计算(GGDC)的结果分别为 67.7%、63.5%和 45.7%,均低于实际的种界限。数年后,通过对绞碎牛肉菌群进行基质辅助激光解吸电离飞行时间质谱分析,检测到第二个分离株 UBT403。V5/DAB/2/5 的脂肪酸图谱由 C 组成,特征 C 7/iso-C 2-OH、C c、C cyclo、C 、C 3-OH、C 3-OH 和 C 2-OH。主要的细胞脂质是氨基磷脂、磷脂、磷脂酰乙醇胺和磷脂酰甘油;主要的醌是 Q9,少量的 Q8。基于表型和化学分类特征,这些分离株可被视为代表一个新的种,提议使用的名称是 sp. nov.。模式菌株是 V5/DAB/2/5(=DSM 111363=LMG 31846);第二个菌株是 UBT403(=DSM 111362=LMG 31847)。

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