Characterization of multiple bacteriocin-producing Lactiplantibacillus plantarum PUK6 isolated from misozuke-tofu

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  • Kawahara Ai
    Division of Food and Health Environmental Sciences, Department of Environmental and Symbiotic Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
  • Murakami Chiaki
    Division of Food and Health Environmental Sciences, Department of Environmental and Symbiotic Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
  • Hayashi Riho
    Division of Food and Health Environmental Sciences, Department of Environmental and Symbiotic Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto
  • Zendo Takeshi
    Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University
  • Matsusaki Hiromi
    Division of Food and Health Environmental Sciences, Department of Environmental and Symbiotic Sciences, Faculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto

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  • Characterization of multiple bacteriocin-producing <i>Lactiplantibacillus plantarum</i> PUK6 isolated from <i>misozuke-tofu</i>

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<p>Multiple bacteriocin-producing Lactiplantibacillus plantarum PUK6 was isolated from misozuke-tofu, tofu pickled in miso, a traditional fermented food that has a production history of more than 800 years in the Kuma district of Kumamoto Prefecture, Japan. The PUK6 strain could grow at below 7.5% NaCl and produced both D- and L-lactic acids. In addition, it exhibited potential probiotic properties, including resistance to gastric acid and a cholesterol-lowering effect. Bacteriocins produced by the PUK6 strain were purified from the culture supernatant by ammonium sulfate precipitation, dialysis, Sep-Pak Plus tC18, and reversed-phase high performance liquid chromatography (RP-HPLC). Three peaks with high antimicrobial activity were obtained by RP-HPLC. Based on amino acid sequencing and genetic analysis by PCR, they were considered to be plantaricins A, EF, and NC8, or similar substances.</p>

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