Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Safety Assessment of Lactiplantibacillus (formerly Lactobacillus) plantarum Q180

  • Kwon, Yoo Jin (Probiotics Research Laboratory, Chong Kun Dang Bio Research Institute (CKDBIO)) ;
  • Chun, Byung Hee (Department of Life Science, Chung-Ang University) ;
  • Jung, Hye Su (Department of Life Science, Chung-Ang University) ;
  • Chu, Jaeryang (Probiotics Research Laboratory, Chong Kun Dang Bio Research Institute (CKDBIO)) ;
  • Joung, Hyunchae (Probiotics Research Laboratory, Chong Kun Dang Bio Research Institute (CKDBIO)) ;
  • Park, Sung Yurb (Probiotics Research Laboratory, Chong Kun Dang Bio Research Institute (CKDBIO)) ;
  • Kim, Byoung Kook (Probiotics Research Laboratory, Chong Kun Dang Bio Research Institute (CKDBIO)) ;
  • Jeon, Che Ok (Department of Life Science, Chung-Ang University)
  • Received : 2021.06.23
  • Accepted : 2021.08.09
  • Published : 2021.10.28
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Abstract

The safety of the probiotic strain Q180, which exerts postprandial lipid-lowering effects, was bioinformatically and phenotypically evaluated. The genome of strain Q180 was completely sequenced, and single circular chromosome of 3,197,263 bp without any plasmid was generated. Phylogenetic and related analyses using16S rRNA gene and whole-genome sequences revealed that strain Q180 is a member of Lactiplantibacillus (Lp., formerly Lactobacillus) plantarum. Antimicrobial resistance (AMR) genes were bioinformatically analyzed using all Lp. plantarum genomes available in GenBank, which showed that AMR genes are present differently depending on Lp. plantarum strains. Bioinformatic analysis demonstrated that some mobile genetic elements such as prophages and insertion sequences were identified in the genome of strain Q180, but because they did not contain harmful genes such as AMR genes and virulence factor (VF)- and toxin-related genes, it was suggested that there is no transferability of harmful genes. The minimum inhibition concentrations of seven tested antibiotics suggested by the European Food Safety Authority guidelines were slightly lower than or equal to the microbiological cut-off values for Lp. plantarum. Strain Q180 did not show hemolytic and gelatinase activities and biogenic amine-producing ability. Taken together, this study demonstrated the safety of strain Q180 in terms of absence of AMR genes and VF- and toxin-related genes as a probiotic strain.

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