The biosafety evaluation of natural Bacillus spp. strains with valuable biotechnological properties
- Authors: Irkitova A.N.1, Dudnik D.E.1, Malkova A.V.1, Khlopova K.V.2
-
Affiliations:
- Altai State University
- State Research Center for Applied Microbiology and Biotechnology
- Issue: Vol 17, No 3 (2025)
- Pages: 188-207
- Section: Biochemistry, Genetics and Molecular Biology
- Published: 31.08.2025
- URL: https://journal-vniispk.ru/2658-6649/article/view/316250
- DOI: https://doi.org/10.12731/2658-6649-2025-17-3-1186
- EDN: https://elibrary.ru/DSUPHE
- ID: 316250
Cite item
Full Text
Abstract
Background. The modern trend in the agriculture development is its greening through the use of microorganisms that have a range of useful properties (antagonistic activity, enzyme production, etc.). An important selection criterion for the inclusion of microbes in the composition of biopreparations is their safety.
Purpose. The present study aimed to investigate the safety of Bacillus spp. natural strains that possessing valuable biotechnological properties.
Material and methods. The objects of the study were 10 bacillus strains from the collection of the Engineering Center "Prombiotech" ASU. The strains were tested for: the ability to produce pathogenicity enzymes using classical microbiological methods (hemolytic, phosphatase, lecithinase and ribonuclease activity), the profile of genes synthesizing enterotoxins and cereulide synthetase of emetic toxin (cytK, hblC, entFM, nheA, ces) using the real-time PCR test system, and the ability of the studied bacillus strains toxicity on a mouse model.
Results. All the studied Bacillus spp. strains showed at least one enzymatic activity (RNAase). For the species B. pumilus, B. toyonensis and the B. licheniformis 6 strain, 3 out of 4 positive enzymatic tests were detected (except for lecithinase). According to the real-time PCR data, all the studied strains showed a negative result for five toxin genes. This was confirmed in vivo, since no acute toxic effect was recorded in the experimental mice from the action of the all the studied Bacillus spp. strains supernatants.
Conclusion. The studied genus Bacillus strains do not belong to potential pathogens of food poisoning in humans and animals, since they do not produce enterotoxins and cereulide, and do not exhibit toxic properties in a mouse model.
Keywords
About the authors
Alena N. Irkitova
Altai State University
Author for correspondence.
Email: elen171987@mail.ru
ORCID iD: 0000-0002-2664-1995
Cand. of Bio. Sc., Asc. Prof., Director Engineering Center “Prombiotech”
Russian Federation, 61, pr. Lenina, Barnaul, Altai Territory, 656049, Russian Federation
Dina E. Dudnik
Altai State University
Email: dudnik-dina@mail.ru
ORCID iD: 0000-0002-2086-8144
Junior Researcher
Russian Federation, 61, pr. Lenina, Barnaul, Altai Territory, 656049, Russian Federation
Angelina V. Malkova
Altai State University
Email: gelishka96@mail.ru
ORCID iD: 0000-0002-4053-036X
Cand. of Bio. Sc., Researcher
Russian Federation, 61, pr. Lenina, Barnaul, Altai Territory, 656049, Russian Federation
Kseniya V. Khlopova
State Research Center for Applied Microbiology and Biotechnology
Email: xlopova.12@yandex.ru
ORCID iD: 0000-0001-7611-3608
Junior Researcher
Russian Federation, 24, Territory "Kvartal A", Obolensk, Serpukhov, 142279, Moscow region, Russian Federation
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