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Anti‑listerial peptides from a marine Bacillus velezensis FTL7: production optimization, characterizations and molecular docking studies
Lidiya Johny, C. and Gnanesh Kumar, B. S. and Aditya Rao, S. J. and Suresh, P. V. (2024) Anti‑listerial peptides from a marine Bacillus velezensis FTL7: production optimization, characterizations and molecular docking studies. 3 Biotech, 14 (105). pp. 1-16.
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Abstract
Antimicrobial peptides (AMPs) with potent anti-listerial activity were characterized from a novel marine Bacillus velezensis FTL7. A Box-Behnken statistical experimental design was used to study the combined impact of culture conditions on the production of AMPs by B. velezensis FTL7. The conditions optimized by statistical experimental design were 34.5 °C incubation temperature, 23 h incubation time, and 7.6 initial pH of the medium. AMP purification was performed by ammonium sulphate fractionation and butanol extraction followed by reversed-phase C18 solid-phase extraction. Tricine-SDS-PAGE analysis revealed a peptide with a molecular mass of ~ 6.5 kDa in an active AMPs fraction, whereas the mass spectrometry (MS) analysis showed the presence of AMPs in the mass range of 1–1.6 kDa, along with a 6.5 kDa peptide. Both MS and MS/MS analysis confirmed the AMPs as lipopeptides including surfactin, fengycins and iturin A and a circular bacteriocin amylocyclicin. The minimum inhibitory concentration of these AMPs against L. monocytogenes Scott A was 2.5 µg/mL. Further, the in-silico docking studies showed that the AMPs from B. velezensis FTL7 have high binding energy and stable binding patterns towards L. monocytogenes target proteins. Thus, this new combination of AMPs can serve as an effective food bio-preservative.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Bacillus velezensis, Listeria monocytogenes, Antimicrobial peptides, Mass spectrometry, In-silico analysis, Box-Behnken design |
| Subjects: | 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 25 Peptide Chemistry 500 Natural Sciences and Mathematics > 07 Life Sciences > 01 Biology > 05 Marine Biology |
| Divisions: | Meat Fish and Poultry Technology |
| Depositing User: | Somashekar K S |
| Date Deposited: | 20 Jan 2025 06:36 |
| Last Modified: | 20 Jan 2025 06:36 |
| URI: | http://ir.cftri.res.in/id/eprint/18961 |
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