Yunnan Institute of Microbiology, Yunnan University, Chenggong Campus, Kunming 650500, PR China.
School of Medicine & College of Agriculture and Life Sciences, Kunming University, Kunming, Yunnan, PR China.
Int J Syst Evol Microbiol. 2023 Aug;73(8). doi: 10.1099/ijsem.0.005985.
Two Gram-stain positive, aerobic, short-rod-shaped, catalase-positive, oxidase-negative and non-motile strains, designated YIM 101343 and YIM 101645, were isolated from faeces of and respectively. The results of 16S rRNA gene analysis indicated that both represented members of the genus and they shared a similarity of 98.0 % with each other. DSM 44953 showed the highest similarity with both strains YIM 101343 (99.0 %) and YIM 101645 (97.3 %). The results of phylogenetic analysis based on 16S rRNA gene indicated that strain YIM 101343 formed a cluster with DSM 44953 and 2019, strain YIM 101645 formed a cluster with YIM 70093, and the two clusters were neighbours. The genomic size of strain YIM 101343 was 3068751 bp and that of strain YIM 101645 was 3169714 bp. The dDDH, ANI and AAI values among strains YIM 101343, YIM 101645 and the closely related species indicated that the two isolates represented two different novel species Both strains contained -diaminopimelic acid and short-chain mycolic acids, and the major menaquinones were MK-9(H) and MK-8(H). The major polar lipids of the two strains were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and phosphatidylinositol mannoside. The major fatty acids (>10 %) of both strains were C, summed feature 4 and Cω9, but C 8 was only present as a major component in YIM 101645 In addition, phenotypic and some chemotaxonomic characteristics of strains YIM 101343, YIM 101645 and the closely related species were different. Thus, strains YIM 101343 and YIM 101645 should represent two novel species of the genus , for which the names sp. nov. and sp. nov. are proposed, respectively. The type strains are YIM 101343 (=DSM 45970=CCTCC AB 2013221) and YIM 101645 (=BCRC 16963=CCTCC AB 2013281=KCTC 39868).
两株革兰氏阳性、需氧、短杆状、过氧化氢酶阳性、氧化酶阴性且不运动的菌株,分别命名为 YIM 101343 和 YIM 101645,分别从 和 的粪便中分离得到。16S rRNA 基因分析结果表明,两者均代表短双歧杆菌属的成员,彼此之间的相似度为 98.0%。DSM 44953 与菌株 YIM 101343(99.0%)和 YIM 101645(97.3%)的相似度最高。基于 16S rRNA 基因的系统发育分析结果表明,菌株 YIM 101343 与 DSM 44953 和 2019 形成一个聚类,菌株 YIM 101645 与 YIM 70093 形成一个聚类,两个聚类互为邻类。菌株 YIM 101343 的基因组大小为 3068751 bp,菌株 YIM 101645 的基因组大小为 3169714 bp。菌株 YIM 101343、YIM 101645 与亲缘关系较近的种之间的 dDDH、ANI 和 AAI 值表明,这两个分离株代表了两个不同的新种。两个菌株均含有 -二氨基庚二酸和短链分枝菌酸,主要的menaquinones 为 MK-9(H)和 MK-8(H)。两个菌株的主要极性脂为双磷脂酰甘油、磷脂酰甘油、磷脂酰肌醇和磷脂酰肌醇甘露糖苷。两个菌株的主要脂肪酸(>10%)为 C、特征 4 和 Cω9,但 C 8 仅作为 YIM 101645 的主要成分存在。此外,菌株 YIM 101343、YIM 101645 与亲缘关系较近的种的表型和一些化学分类特征不同。因此,菌株 YIM 101343 和 YIM 101645 应代表短双歧杆菌属的两个新种,分别命名为 sp. nov. 和 sp. nov.。模式菌株为 YIM 101343(=DSM 45970=CCTCC AB 2013221)和 YIM 101645(=BCRC 16963=CCTCC AB 2013281=KCTC 39868)。