Institute of Biological Sciences, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia.
Faculty of Plantation and Agrotechnology, Universiti Teknologi MARA Cawangan Melaka, Kampus Jasin, 77300 Merlimau, Melaka, Malaysia.
Int J Syst Evol Microbiol. 2022 Oct;72(10). doi: 10.1099/ijsem.0.005594.
A urease-producing Gram-stain-positive actinobacterium, designated strain T5, was isolated from a soil sample collected at a highway hillslope in Selangor, Malaysia. The strain was found to produce pale yellowish-pink aerial mycelia with smooth long chain spores and extensively branched light yellowish-pink substrate mycelia on oatmeal agar. Strain T5 grew at 15-37 °C, pH 6-11, and tolerated up to 9 % (w/v) NaCl, with optimal growth occurring at 28 °C, pH 6-9 and without NaCl. The whole-cell sugar hydrolysate of strain T5 contained galactose, glucose and ribose. The ll-diaminopimelic acid isomer was detected in the cell wall. Diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylinositol were found to be the predominant polar lipids. The main fatty acids were anteiso-C, iso-C, anteiso-C and iso-C. Comparative analysis of the 16S rRNA gene sequences indicated that strain T5 belonged to of the family with the highest 16S rRNA gene sequence similarity to LCR6-01 (99.0 %). The overall genome relatedness indices revealed that the closest related species was LCR6-01 with 89.4 % average nucleotide identity and 33.7 % digital DNA-DNA hybridization. Phylogeny analyses showed that strain T5 was closely related to , , , and . Based on these polyphasic data, strain T5 represents a novel species, for which the name sp. nov. is proposed. The type strain is T5 (=TBRC 5137= DSM 42166).
一株产脲酶的革兰氏阳性放线菌,被命名为 T5 株,从马来西亚雪兰莪州高速公路山坡上的土壤样本中分离得到。该菌株产生浅黄粉色气生菌丝,具有光滑的长链孢子,在燕麦琼脂上广泛分枝的浅黄粉色基质菌丝。T5 株在 15-37°C、pH6-11 下生长,可耐受高达 9%(w/v)的 NaCl,最适生长温度为 28°C、pH6-9 且无 NaCl。T5 株的全细胞糖水解物含有半乳糖、葡萄糖和核糖。细胞壁中检测到 ll-二氨基庚二酸异构体。发现二磷脂酰甘油、磷脂酰胆碱、磷脂酰乙醇胺、磷脂酰甘油和磷脂酰肌醇是主要的极性脂。主要脂肪酸为 anteiso-C、iso-C、anteiso-C 和 iso-C。16S rRNA 基因序列的比较分析表明,T5 株属于 科,与 LCR6-01(99.0%)的 16S rRNA 基因序列相似度最高。全基因组相关指数表明,最接近的相关种是 LCR6-01,其平均核苷酸同一性为 89.4%,数字 DNA-DNA 杂交率为 33.7%。系统发育分析表明,T5 株与 、 、 、 和 密切相关。基于这些多相数据,T5 株代表一个新的种,提议命名为 sp. nov.。模式菌株为 T5(=TBRC 5137=DSM 42166)。