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首页> 外文期刊>The Journal of General and Applied Microbiology >Sphingobacterium ginsenosidimutans sp. nov., a bacterium with ginsenoside-converting activity isolated from the soil of a ginseng field
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Sphingobacterium ginsenosidimutans sp. nov., a bacterium with ginsenoside-converting activity isolated from the soil of a ginseng field

机译：人参Sphingobacterium ginsenosidimutans sp。十一月，一种从人参田土壤中分离出的具有人参皂苷转化活性的细菌

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摘要

A Gram-staining-negative, aerobic, non-motile, non-spore-forming, and rod-shaped bacterium designated THG 07~T was isolated from the soil of a ginseng field of Pocheon in South Korea, and its taxonomic position was investigated by using a polyphasic study. Strain THG 07~T grew optimally at 25-30°C and at pH 6.5-7.0 and in the absence of NaCI on nutrient agar. Strain THG-T17~T displayed p-glucosidase activity that was responsible for its ability to transform ginsenoside Rbi (one of the dominant ginsenosides of ginseng) to compound C-K. On the basis of 16S rRNA gene sequence similarity, strain THG 07~T was shown to belong to the family Sphingobacteriaceae and was related to Sphingobacterium canadense CR11~T (98.7%), S. cladoniae No.6~T (98.1%), S. de-tergens 6.2S~T (98.0%), S. multivorum IAM14316~T (97.9%), S. siyangense SY1~T (97.8%) and S. thalpophilum DSM11723~T (96.9%). The G+C content of the genomic DNA was 40.6 mol%. The major menaquinone, MK-7, and major fatty acids, iso-C_(15:0) and C_(16:1) ω7c and/or ω6c, supported the affiliation of strain THG 07~T to the genus Sphingobacterium. The DNA-DNA relatedness values between strain THG 07~T and its closest phylogenetic neighbors were below 26.9%. The results of physiological and biochemical tests enabled strain THG 07~T to be differentiated pheno-typically from the recognized species of the genus Sphingobacterium. Therefore the isolate represents a novel species, for which the name Sphingobacterium ginsenosidimutans sp. nov. is proposed, with the type strain THG 07~T (=KACC 14526~T=JCM 16722~T).
机译：从韩国抱川市人参田土壤中分离出革兰氏阴性，好氧，无运动，无芽孢和杆状细菌，命名为THG 07〜T，并对其分类学位置进行了研究。通过多相研究。在营养琼脂上没有NaCl的情况下，菌株THG 07〜T在25-30°C和pH 6.5-7.0下生长最佳。 THG-T17〜T菌株显示出p-葡萄糖苷酶活性，这是其将人参皂苷Rbi（人参的主要人参皂苷之一）转化为化合物C-K的能力的原因。根据16S rRNA基因序列相似性，菌株THG 07〜T显示为属于Sphingobacteriaceae科，与加拿大贪食性Sphingobacter CR11〜T（98.7％），S.cladoniae No.6〜T（98.1％），鹿角链霉菌为6.2S〜T（98.0％），多孢菌IAM14316〜T（97.9％），泗阳链霉菌SY1〜T（97.8％）和嗜盐链球菌DSM11723〜T（96.9％）。基因组DNA的G + C含量为40.6mol％。主要的甲萘醌MK-7和主要的脂肪酸iso-C_（15：0）和C_（16：1）ω7c和/或ω6c支持THG 07〜T菌株与Sphingobacter属的隶属关系。 THG 07〜T菌株与其最亲近的亲缘关系之间的DNA-DNA相关性值低于26.9％。生理和生化测试的结果使菌株THG 07〜T在表型上与公认的Sphingobacterium属物种区分开。因此，该分离物代表了一种新物种，其名称为Sphingobacterium ginsenosidimutans sp。十一月建议使用THG 07〜T（= KACC 14526〜T = JCM 16722〜T）型应变。

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