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Identification of Rare Bacterial Pathogens by 16S rRNA Gene Sequencing and MALDI-TOF MS
Published on: July 11, 2016
Sphingomonas ginsenosidimutans sp. nov., with ginsenoside converting activity
Tae-Eun Choi1, Qing-Mei Liu, Jung-Eun Yang
1Department of Oriental Medicinal Material and Processing, College of Life Science, Kyung Hee University, Gyeonggi-do, 446-701, Republic of Korea.
Journal of Microbiology (Seoul, Korea)
|January 12, 2011
Summary
A novel bacterial species, Sphingomonas ginsenosidimutans, was discovered in South Korean soil. This bacterium possesses unique -glucosidase activity, enabling the transformation of ginseng
Area of Science:
- Microbiology
- Genomics
- Biochemistry
Background:
- Soil bacteria play crucial roles in nutrient cycling and plant health.
- Ginseng cultivation involves specific soil microbial communities.
- Understanding novel microorganisms can reveal new biotechnological applications.
Purpose of the Study:
- To isolate and taxonomically characterize a novel bacterial strain from a ginseng cultivating field.
- To investigate the biochemical properties of the isolated bacterium, particularly its enzyme activity.
- To determine the phylogenetic and genotypic distinctiveness of the novel species.
Main Methods:
- Isolation and cultivation of bacterial strain Gsoil 1429(T) from soil.
- Polyphasic taxonomic analysis including 16S rRNA gene sequencing.
- Determination of phenotypic characteristics, G+C content, and chemotaxonomy (respiratory quinones, fatty acids).
- Enzyme activity assays, specifically for -glucosidase and ginsenoside transformation.
Main Results:
- Strain Gsoil 1429(T) is a Gram-negative, aerobic rod belonging to the Sphingomonas genus.
- The bacterium exhibits -glucosidase activity, transforming ginsenoside Rb1 to F(2).
- Phylogenetic analysis and DNA-DNA hybridization confirmed its status as a novel species, Sphingomonas ginsenosidimutans.
- Optimal growth conditions were identified at 25-37°C and pH 7.0 without NaCl.
Conclusions:
- Sphingomonas ginsenosidimutans sp. nov. is proposed as a new species within the Sphingomonadaceae family.
- The unique enzymatic capability of this bacterium has implications for ginsenoside metabolism and potential biotechnological applications.
- This discovery expands the known diversity of soil microorganisms in ginseng-rich environments.
