Journal of Microbiology

, Volume 55, Issue 7, pp 525–530 | Cite as

Mucilaginibacter hankyongensis sp. nov., isolated from soil of ginseng field Baekdu Mountain

  • Qingmei Liu
  • Muhammad Zubair Siddiqi
  • Mi-Sun Kim
  • Sang Yong Kim
  • Wan-Taek ImEmail author
Microbial Systematics and Evolutionary Microbiology


A Gram-negative, non-motile, aerobic, and rod-shaped bacterial strain designated as BR5-28T was isolated from the soil of a ginseng field at Baekdu Mountain Korea, and its taxonomic position was investigated using a polyphasic approach. Strain BR5-28T grew at 10–42°C (optimum temperature, 30°C) and pH 5.5–8.5 (optimum pH, 7.0) on R2A agar medium without additional NaCl supplementation. Strain BR5- 28T exhibited β-glucosidase activity, which was responsible for its ability to transform the ginsenosides Rb1 and Rd (the two dominant active components of ginseng) to compound-K. Based on 16S rRNA gene phylogeny, the novel strain showed a new branch within the genus Mucilaginibacter of the family Sphingobacteriaceae, and formed clusters with Mucilaginibacter frigoritolerans FT22T (95.8%) and Mucilaginibacter gotjawali SA3-7T (95.7%). The G+C content of the genomic DNA was 45.1%. The predominant respiratory quinone was MK-7 and the major fatty acids were summed feature 3 (comprising C16:1 ω6c and/or C16:1 ω7c), iso-C15:0 and anteiso-C15:0. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Strain BR5-28T was differentiated genotypically and phenotypically from the recognized species of the genus Mucilaginibacter. The isolate therefore represents a novel species, for which the name Mucilaginibacter hankyongensis sp. nov. is proposed, with the type strain BR5-28T (=KCTC 22274T =DSM 21151T).


16S rRNA gene polyphasic taxonomy Mucilaginibacter hankyongensis ginsenoside 


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Copyright information

© The Microbiological Society of Korea and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Qingmei Liu
    • 1
    • 2
  • Muhammad Zubair Siddiqi
    • 1
    • 2
  • Mi-Sun Kim
    • 3
  • Sang Yong Kim
    • 4
  • Wan-Taek Im
    • 1
    • 2
    Email author
  1. 1.Department of BiotechnologyHankyong National UniversityAnseongRepublic of Korea
  2. 2.Center for Genetic InformationGraduate School of Bio and Information Technology, Hankyong National UniversityAnseongRepublic of Korea
  3. 3.Clean Fuel Research CenterKorea Institute of Energy ResearchDaejeonRepublic of Korea
  4. 4.Department of Food Science & Bio TechnologyShinansan UniversityAnsanRepublic of Korea

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