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Characterization of Membrane Transporters by Heterologous Expression in E. coli and Production of Membrane Vesicles
Published on: December 31, 2019
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Isolation and characterization of Lactobacillus-derived membrane vesicles
Scott N Dean1, Dagmar H Leary2, Claretta J Sullivan3
1National Research Council Associate, Washington, DC, USA.
Scientific Reports
|January 31, 2019
Summary
Researchers explored bacterial membrane vesicles (MVs) from Lactobacillus species, finding over 80 protein components. These MVs show potential for developing novel therapeutics and vaccines.
Area of Science:
- Microbiology
- Biotechnology
- Molecular Biology
Background:
- Bacterial membrane vesicles (MVs) play diverse roles in microbial communities, including pathogenesis and gene transfer.
- Initially associated with Gram-negative bacteria, MV production is now recognized in Gram-positive species like Staphylococcus aureus and Lactobacillus.
- Lactobacillus species, often used as probiotics, offer a promising platform for engineering MVs for therapeutic applications.
Purpose of the Study:
- To characterize and compare membrane vesicles (MVs) from three distinct Lactobacillus species: L. acidophilus, L. casei, and L. reuteri.
- To lay the groundwork for future strategies in engineering Lactobacillus-derived MVs.
- To identify potential protein sorting mechanisms within these MVs.
Main Methods:
- Physicochemical characterization of MVs from L. acidophilus, L. casei, and L. reuteri.
- Comprehensive proteomic analysis to identify protein components within the MVs.
- Bioinformatic analysis of identified proteins, including categorization by biological pathway and examination for subcellular localization signals.
Main Results:
- Over 80 protein components were identified in the Lactobacillus-derived MVs.
- Certain proteins were found to be enriched within the MVs, suggesting their potential role as antimicrobial delivery vehicles.
- Proteins were categorized by biological pathway, and subcellular localization signals were analyzed to understand MV protein sorting.
Conclusions:
- Lactobacillus membrane vesicles are rich in diverse proteins, with some enriched components indicating potential for antimicrobial delivery.
- Understanding the protein composition and sorting mechanisms is crucial for engineering MVs for therapeutic and vaccine development.
- This study provides a foundation for harnessing Lactobacillus MVs as novel biotechnological tools.
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