Multiomics-Based Biocargo Components Analysis in Enterococcus faecium Membrane Vesicles

Area of Science:

• Microbiology
• Molecular Biology
• Biochemistry

Background:

• Enterococcus spp. exhibit gastrointestinal protective functions.
• Membrane vesicles (MVs) from Enterococcus faecium (E. faecium) are implicated in gastric protection.
• The functional role of MVs is dictated by their molecular composition.

Purpose of the Study:

• To comprehensively characterize the biocargo components of E. faecium MVs (EfmMVs).
• To elucidate the complex mixture of RNAs, proteins, and metabolites within EfmMVs using multi-omics approaches.
• To establish a foundation for understanding E. faecium's therapeutic potential.

Main Methods:

• Isolation of MVs from E. faecium cultures.
• Application of transcriptomics (RNA-sequencing) to identify RNA cargo.
• Utilized label-free quantitative proteomics and untargeted metabolomics to profile protein and metabolite content.

Main Results:

• Identified 2122 transcripts, 711 proteins, and 519 metabolites in EfmMVs.
• Top identified components included enzymes in glycolysis, ribosomal proteins, RNA polymerases, and peptidoglycan lyases.
• Pathway analyses indicated enrichment in metabolism, genetic information processing, and environmental information processing.

Conclusions:

• EfmMVs carry a diverse cargo of molecules crucial for cellular functions.
• The multi-omics characterization provides insights into the molecular mechanisms of E. faecium's protective effects.
• This study lays groundwork for future research into E. faecium applications in gastrointestinal health.