Probiotic Benefits and Safety of Marine Bacteria E3: A Complete Genome Study

Jim Crocker
16th May, 2024

Probiotic Benefits and Safety of Marine Bacteria E3: A Complete Genome Study

The marine isolate Pediococcus pentosaceus E3 is a coccoidal-shaped bacterium (a) that demonstrates a key safety feature for probiotics by showing no hemolytic activity on blood agar (b).

Image adapted from: Zaghloul et al. / CC BY (Source)

Key Findings

  • The study focused on the marine-derived Pediococcus pentosaceus E3, isolated from shrimp gut, to assess its probiotic potential
  • E3 strain showed tolerance to low pH and high bile salt conditions, crucial for surviving the gastrointestinal tract
  • The E3 strain's genome revealed no virulence factors or clinically relevant antibiotic resistance genes, supporting its safety for human consumption
Probiotics are beneficial bacteria that play a crucial role in maintaining human health. They are known for their ability to produce bacteriocins, which are antimicrobial peptides that inhibit the growth of harmful bacteria. Evaluating the whole-genome sequence of probiotics provides a deeper understanding of their safety and functional diversity. A recent study conducted by the National Institute of Oceanography and Fisheries focused on the marine-derived Pediococcus pentosaceus E3, isolated from shrimp gut, to assess its potential as a probiotic candidate[1]. The E3 strain exhibited several beneficial properties. It was found to be susceptible to most antibiotics tested, which is a positive attribute as it reduces the risk of transferring antibiotic resistance genes to pathogenic bacteria. The strain also showed tolerance to low pH and high bile salt conditions, which are critical for surviving the harsh environment of the gastrointestinal tract. Additionally, it revealed no hemolysin activity, indicating that it does not cause the destruction of red blood cells, which is an important safety feature. Interestingly, the study found that the cell-free supernatant (CFS) of E3 displayed significant antibacterial activity against various pathogens. When concentrated, the CFS showed outstanding antimicrobial activity, suggesting its potential use as a natural biopreservative. This finding aligns with previous studies that have highlighted the ability of probiotics to produce antimicrobial compounds[2]. The whole-genome sequencing analysis of the E3 strain provided further insights into its probiotic characteristics. The genome size was approximately 1.8 megabases (Mb) with a guanine-cytosine (G + C) content of 37.28%. It contained 1805 protein-coding genes, and importantly, it revealed the absence of virulence factors and clinically related antibiotic resistance genes. This supports the safety of the E3 strain for potential human consumption. Several genes associated with typical probiotic features were identified within the E3 genome. These included genes related to stress response, carbohydrate metabolism, and vitamin biosynthesis. The presence of these genes indicates that E3 can survive and function effectively in the gastrointestinal tract, which is essential for a probiotic to confer health benefits to the host. This finding is consistent with earlier research that has shown how probiotics activate defense mechanisms to survive harsh conditions[3]. In addition to these beneficial properties, the study also identified genes involved in the survival and colonization within the gastrointestinal tract. These genes are crucial for the probiotic to establish itself in the gut and exert its health-promoting effects. This is in line with previous findings that have demonstrated the importance of such genes in probiotics[4]. The findings of this study suggest that Pediococcus pentosaceus E3 is a promising probiotic candidate with significant health-promoting potential. Its genetic characteristics ensure its safety and effectiveness, making it a valuable addition to the range of available probiotics. Furthermore, the study highlights the potential of E3 as a natural biopreservative, which could have important applications in food preservation. In conclusion, the study conducted by the National Institute of Oceanography and Fisheries provides valuable insights into the probiotic characteristics of the marine-derived Pediococcus pentosaceus E3. The comprehensive genomic analysis confirms its safety and functional diversity, supporting its potential use as a health-promoting probiotic and natural biopreservative. This research builds on previous findings and expands our understanding of the genetic basis of probiotic functionality, paving the way for future developments in probiotic applications.

BiotechGeneticsMarine Biology

References

Main Study

1) Marine Pediococcus pentosaceus E3 Probiotic Properties, Whole-Genome Sequence Analysis, and Safety Assessment

Published 15th May, 2024

https://doi.org/10.1007/s12602-024-10283-7

Related Studies

2) Probiotics, their prophylactic and therapeutic applications in human health development: A review of the literature.

https://doi.org/10.1016/j.heliyon.2022.e09725

3) Understanding the Probiotic Bacterial Responses Against Various Stresses in Food Matrix and Gastrointestinal Tract: A Review.

https://doi.org/10.1007/s12602-023-10104-3

4) Integrated genome-based assessment of safety and probiotic characteristics of Lactiplantibacillus plantarum PMO 08 isolated from kimchi.

https://doi.org/10.1371/journal.pone.0273986


Related Articles

An unhandled error has occurred. Reload 🗙