Abstract Bacteriocins are antimicrobial peptides synthesized by lactic acid bacteria. These are well known for their anti-bacterial activity in fermented foods and extend the shelf-life and safety of food items. The optimum bacteriocin production was predicted from Lactobacillus acidophilus MS1 using Box-Behnken experimental design. The maximum bacteriocin activity titre of 2600AU/mL was observed with 30 °C, pH 6 and 18 h incubation time. The results derived from response surface methodology (RSM) regression equation indicated that the initial pH of the model system influencing stronger than other physical variables at 95% confidence level. Moreover, quadratic and interaction effects of these variables were also found significant. A monomeric peptide of 6.5 kDa was purified to 59.1-fold from crude sample using ion exchange and gel filtration chromatography. Purified peptide showed strong inhibitory activity against biofilm produced by Bacillus cereus, a food born pathogen. Box-Behnken design can be used for large scale production of bacteriocin from novel strain of Lactobacillus acidophilus MS1 that might be used as a preservative and non-allergic antibiotic in food as well as in pharmaceuticals.
ABSTRACT
PUBLICATION RECORD
- Publication year
2020
- Venue
Biocatalysis and agricultural biotechnology
- Publication date
2020-03-01
- Fields of study
Agricultural and Food Sciences, Chemistry
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- External record
- Source metadata
Semantic Scholar
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