Abstract
Lactic acid bacteria (LAB) are possessing ability to synthesize antimicrobial compounds (like bacteriocin) during their growth. In this regard, novel bacteriocin compound secreting capability of LAB isolated from Tulum Cheese in Turkey was demonstrated. The synthesized bacteriocin was purified by ammonium sulphate precipitation, dialysis and gel filtration. The molecular weight (≈3.4 kDa) of obtained bacteriocin was confirmed by SDS-PAGE, which revealed single peptide band. Molecular identification of LAB strain isolated from Tulum Cheese was conducted using 16S rDNA gene sequencing as Lactococcus lactis ssp. lactis LL171. The amino acid sequences (KKIDTRTGKTMEKTEKKIELSLKNMKTAT) of the bacteriocin from Lactococcus lactis ssp. lactis LL171 was found unique and novel than reported bacteriocins. Further, the bacteriocin was possessed the thermostable property and active at wide range of pH values from 1 to 11. Thus, bacteriocin reported in this study has the potential applications property as food preservative agent.
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Acknowledgments
This work was supported by the grant from Tubitak, Turkey under 2216-Research Fellowships for Foreign Citizens program with the project entitled “İsolation and identification of new bacteriocin producing lactic acid bacteria, antibacterial activity against food spoilage and human pathogenic bacteria and its potential as biopreservatives”. I am happy to acknowledge the company I enjoyed by working along with my colleagues and friends Deniz Yüksel, Duygu Abbasoglu, Neslihan Taşkale, Seyit Nesimi Bulut, İbrahim Erdoğan, Mine Gunes and Meral Kaya.
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Kumari, A., Akkoç, N. & Akçelik, M. Purification and partial characterization of bacteriocin produced by Lactococcus lactis ssp. lactis LL171. World J Microbiol Biotechnol 28, 1647–1655 (2012). https://doi.org/10.1007/s11274-011-0971-4
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DOI: https://doi.org/10.1007/s11274-011-0971-4