Purification and characterization of lipopeptides produced by Bacillus subtilius and their antibacterial effects on Escherichia coli and Staphylococcus aureus
{"title":"Purification and characterization of lipopeptides produced by Bacillus subtilius and their antibacterial effects on Escherichia coli and Staphylococcus aureus","authors":"","doi":"10.1016/j.procbio.2024.06.033","DOIUrl":null,"url":null,"abstract":"<div><p>Lipopeptides have favorable biological activity and thus have great potential to serve as replacements. Whole genome sequencing was used in this work to pinpoint the gene clusters in <em>Bacillus subtilis</em> that code for secondary metabolites that have antibacterial qualities. Afterwards, the metabolic pathways responsible for the production of these compounds were clarified, and the lipopeptides were separated and identified using a combination of chromatography and spectroscopy methods, such as High-Performance Liquid Chromatography (HPLC), Fourier Transform Infrared Spectroscopy (FTIR), and Liquid Chromatography-Mass Spectrometry (LC-MS). <em>Bacillus subtilis</em> mainly synthesized surfactin homologs with carbon chain lengths ranging from C13 to C16 ([M+H]+: 994.6418; 1008.6586; 1022.6730; 1036.6896) and fengycin homologs with carbon chain lengths of C15 and C16 ([M+H]+: 1449.7937, 1463.8046). The isolated lipopeptides exhibited strong inhibitory effects against <em>Escherichia coli</em> and <em>Staphylococcus aureus</em>, with minimum inhibitory doses of 12.50 mg/L and 6.25 mg/L, respectively. Furthermore, lipopeptides demonstrated a dose-dependent inhibition of <em>E. coli</em> and <em>S. aureus</em>. The findings from SEM and SYTO 9/PI staining demonstrate that lipopeptides function by compromising the integrity of bacterial cell membranes. The results demonstrate the effectiveness of lipopeptides as antibacterial agents against foodborne pathogens, indicating their potential as substitutes for traditional antibiotics.</p></div>","PeriodicalId":20811,"journal":{"name":"Process Biochemistry","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Process Biochemistry","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359511324002198","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOCHEMISTRY & MOLECULAR BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Lipopeptides have favorable biological activity and thus have great potential to serve as replacements. Whole genome sequencing was used in this work to pinpoint the gene clusters in Bacillus subtilis that code for secondary metabolites that have antibacterial qualities. Afterwards, the metabolic pathways responsible for the production of these compounds were clarified, and the lipopeptides were separated and identified using a combination of chromatography and spectroscopy methods, such as High-Performance Liquid Chromatography (HPLC), Fourier Transform Infrared Spectroscopy (FTIR), and Liquid Chromatography-Mass Spectrometry (LC-MS). Bacillus subtilis mainly synthesized surfactin homologs with carbon chain lengths ranging from C13 to C16 ([M+H]+: 994.6418; 1008.6586; 1022.6730; 1036.6896) and fengycin homologs with carbon chain lengths of C15 and C16 ([M+H]+: 1449.7937, 1463.8046). The isolated lipopeptides exhibited strong inhibitory effects against Escherichia coli and Staphylococcus aureus, with minimum inhibitory doses of 12.50 mg/L and 6.25 mg/L, respectively. Furthermore, lipopeptides demonstrated a dose-dependent inhibition of E. coli and S. aureus. The findings from SEM and SYTO 9/PI staining demonstrate that lipopeptides function by compromising the integrity of bacterial cell membranes. The results demonstrate the effectiveness of lipopeptides as antibacterial agents against foodborne pathogens, indicating their potential as substitutes for traditional antibiotics.
期刊介绍:
Process Biochemistry is an application-orientated research journal devoted to reporting advances with originality and novelty, in the science and technology of the processes involving bioactive molecules and living organisms. These processes concern the production of useful metabolites or materials, or the removal of toxic compounds using tools and methods of current biology and engineering. Its main areas of interest include novel bioprocesses and enabling technologies (such as nanobiotechnology, tissue engineering, directed evolution, metabolic engineering, systems biology, and synthetic biology) applicable in food (nutraceutical), healthcare (medical, pharmaceutical, cosmetic), energy (biofuels), environmental, and biorefinery industries and their underlying biological and engineering principles.