ArticleMicrobial cell factories2026
Low-cost biosurfactant production by Achromobacter xylosoxidans PX106473 from waste frying oil: partial characterization and antimicrobial mechanism via molecular docking.
Article in Microbial cell factories, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundInterest in microbial biosurfactants has increased due to the rising demand for environmentally friendly and sustainable surfactants. Waste frying oil provides a renewable and low-cost feedstock for their production. This study aimed to isolate, characterize, and evaluate the antibacterial mechanism of a biosurfactant synthesized by Achromobacter xylosoxidans PX106473 using waste frying oil as an economical carbon source.
resultsAchromobacter xylosoxidans PX106473 produced a biosurfactant with significant activity, including an emulsification index (E24%) of 66.7% against kerosene and substantial oil displacement and hemolytic activities. According to the results of thin-layer chromatography (TLC), the produced biosurfactant contained lipids and amino acids. Fourier transform infrared spectroscopy (FT-IR) results revealed the presence of an N-H group, aliphatic hydrocarbons, and amide peaks, which suggest a lipid-peptide linkage, providing further evidence for its putative lipopeptide nature. Hexadecanoic acid, with an area percentage of 76.44, was the dominant component of the lipopeptide based on gas chromatography-mass spectrometry (GC-MS) results. The produced biosurfactant demonstrated good inhibitory activity against E. coli and S. aureus. These biological findings were further supported by in silico assays; molecular docking studies showed that hexadecanoic acid binds stably to key bacterial proteins from E. coli (DNA gyrase B, -6.4 kcal/mol) and S. aureus (PBP2a, -3.9 kcal/mol), indicating a potential dual-target mechanism.
conclusionAchromobacter xylosoxidans efficiently produced a putative lipopeptide biosurfactant from waste frying oil with strong emulsifying and antibacterial properties, providing an economical and sustainable solution with potential in various environmental and pharmaceutical applications.
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