Cited by 32Probiotics and Fermented FoodsAnimal Nutrition and PhysiologyAquaculture disease management and microbiota

Complete genome analysis of Bacillus velezensis TS5 and its potential as a probiotic strain in mice

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Chen, Benhao, Zhou, Yi, Duan, Lixiao, Gong, Xuemei, Liu, Xingmei, Pan, Kangcheng, Zeng, Dong, Ni, Xueqin +1 more·2023·Frontiers in Microbiology

Abstract

Introduction: In recent years, a large number of studies have shown that Bacillus velezensis has the potential as an animal feed additive, and its potential probiotic properties have been gradually explored. Methods: In this study, Illumina NovaSeq PE150 and Oxford Nanopore ONT sequencing platforms were used to sequence the genome of Bacillus velezensis TS5, a fiber-degrading strain isolated from Tibetan sheep. To further investigate the potential of B. velezensis TS5 as a probiotic strain, in vivo experiments were conducted using 40 five-week-old male specific pathogen-free C57BL/6J mice. The mice were randomly divided into four groups: high fiber diet control group (H group), high fiber diet probiotics group (HT group), low fiber diet control group (L group), and low fiber diet probiotics group (LT group). The H and HT groups were fed high-fiber diet (30%), while the L and LT groups were fed low-fiber diet (5%). The total bacteria amount in the vegetative forms of B. velezensis TS5 per mouse in the HT and LT groups was 1 × 10 9 CFU per day, mice in the H and L groups were given the same volume of sterile physiological saline daily by gavage, and the experiment period lasted for 8 weeks. Results: The complete genome sequencing results of B. velezensis TS5 showed that it contained 3,929,788 nucleotides with a GC content of 46.50%. The strain encoded 3,873 genes that partially related to stress resistance, adhesion, and antioxidants, as well as the production of secondary metabolites, digestive enzymes, and other beneficial nutrients. The genes of this bacterium were mainly involved in carbohydrate metabolism, amino acid metabolism, vitamin and cofactor metabolism, biological process, and molecular function, as revealed by KEGG and GO databases. The results of mouse tests showed that B. velezensis TS5 could improve intestinal digestive enzyme activity, liver antioxidant capacity, small intestine morphology, and cecum microbiota structure in mice. Conclusion: These findings confirmed the probiotic effects of B. velezensis TS5 isolated from Tibetan sheep feces and provided the theoretical basis for the clinical application and development of new feed additives.

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Crossref · 10.3389/fmicb.2023.1322910

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  • The VFDB database includes virulence factors found in B. subtilis and B. velezensis, such as capBCA and hemolysin A (hlyA).

    “The VFDB database used includes several virulence factors that can be found in both B. subtilis and B. velezensis species, such as capBCA (encoding membrane-associated enzymes facilitating systemic invasion) and hemolysin A (hlyA, a pore-forming toxin that possesses hemolytic, cytotoxic, dermonecrotic, and vascular permeability activities) [100, 101].”

    From Profiling the resistome and virulome of Bacillus strains used for probiotic-based sanitation: a multicenter WGS analysis (2025) · cites this paper as [101]

    Methods §2.2 says the authors used VFDB to screen the B. velezensis TS5 genome, and Discussion §4.1 identifies hlyA as a potential virulence factor. The paper does not establish that capBCA or hlyA occur in both B. subtilis and B. velezensis, or describe the functions assigned to them in the citing sentence; it specifically reports that hlyA was absent from strain TS5. Page numbers were not available in our copy. (LLM, conf=0.88)

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Authors
Chen, B., Zhou, Y., Duan, L., Gong, X., Liu, X., Pan, K., Zeng, D., Ni, X., & Zeng, Y.
Affiliations
Ministry of Education of the People's Republic of China (CN)
Corresponding author
  • Zeng, Dong
  • Ni, Xueqin
  • Zeng, Yan
Venue
Frontiers in Microbiology
Published
2023-12-06
Volume
14
Pages
1322910-1322910
ISSN
1664-302X (ISSN-L)
OpenAlex
W4389393046
Cited by
32
References
86
Citations by year
2026: 8 · 2025: 17 · 2024: 7
FWCI
4.61
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Microbiology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Natural Science Foundation of Sichuan Province
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
  • Life Sciences › Immunology and Microbiology › Immunology › Aquaculture disease management and microbiota
Keywords
whole genome sequencing, probiotic potential, fiber-degrading bacteria, Tibetan sheep, high-fiber diet, digestive enzyme activity, antioxidant capacity, intestinal morphology, cecal microbiota, feed additives, stress resistance genes, secondary metabolites

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