Latest Research News on Bacillus: Dec – 2019

Bacillus probiotics

Bacterial spore formers are getting used as probiotic supplements to be used in animal feeds, for human dietary supplements also as in registered medicines. Their heat stability and skill to survive the gastric barrier makes them attractive as food additives and this use is now being taken forward. While often considered soil organisms this conception is misplaced and Bacilli should be considered as gut commensals. This review summarises the present use of Bacillus species as probiotics, their safety, mode of action also as their commercial applications. [1]

Essential Bacillus subtilis genes

To estimate the minimal gene set required to sustain bacterial life in nutritious conditions, we administered a scientific inactivation of Bacillus subtilis genes. Among ≈4,100 genes of the organism, only 192 were shown to be indispensable by this or previous work. Another 79 genes were predicted to be essential. The overwhelming majority of essential genes were categorized in relatively few domains of cell metabolism, with about half involved in information science, one-fifth involved within the synthesis of cell envelope and therefore the determination of cell shape and division, and one-tenth associated with cell energetics. Only 4% of essential genes encode unknown functions. Most essential genes are present throughout a good range of Bacteria, and almost 70% also can be found in Archaea and Eucarya. [2]

Bacillus anthracis, Bacillus cereus, and Bacillus thuringiensis—One Species on the Basis of Genetic Evidence

Bacillus anthracis, Bacillus cereus, andBacillus thuringiensis are members of the Bacillus cereus group of bacteria, demonstrating widely different phenotypes and pathological effects. B. anthracis causes the acute fatal disease anthrax and may be a potential bioweapon thanks to its high toxicity. B. thuringiensis produces intracellular protein crystals toxic to a good number of insect larvae and is that the most ordinarily used biological pesticide worldwide. B. cereus may be a probably ubiquitous soil bacterium and an opportunistic pathogen that’s a standard explanation for gastrointestinal disorder. In contrast to the differences in phenotypes, we show by multilocus enzyme electrophoresis and by sequence analysis of nine chromosomal genes thatB. anthracis should be considered a lineage of B. cereus. [3]

Bioprospecting desert plant Bacillus endophytic strains for their potential to enhance plant stress tolerance

Plant growth-promoting bacteria (PGPB) are known to extend plant tolerance to many abiotic stresses, specifically those from dry and salty environments. during this study, we examined the endophyte bacterial community of 5 plant species growing within the Thar desert of Pakistan. Among a complete of 368 culturable isolates, 58 Bacillus strains were identified from which the 16 most divergent strains were characterized for salt and warmth stress resilience also as antimicrobial and plant growth-promoting (PGP) activities. When the 16 Bacillus strains were tested on the non-host plant Arabidopsis thaliana, B. cereus PK6-15, B. [4]

Effects of Some Cultural Conditions on Keratinase Production by Bacillus licheniformis Strain NBRC 14206

Aims: Microbial keratinase is an extracellular enzyme capable of degrading keratin present in feathers, hair, and wool. they’re widely utilized in chemical, medical industries also as in animal feed industry and basic biology. This study investigated the isolation and effects of some cultural conditions on keratinase production by Bacillus licheniformis strain NBRC 14206 using raw feather.

Study Design: One-factor-at-a-time strategy was adopted to guage the consequences of some fermentation conditions on keratinase production.

Place and Duration of Study: Department of Microbiology, Faculty of Science, University of Port Harcourt, Nigeria, between September 2015 and June 2016. [5]

Reference

[1] Cutting, S.M., 2011. Bacillus probiotics. Food microbiology, 28(2), (Web Link)

[2] Kobayashi, K., Ehrlich, S.D., Albertini, A., Amati, G., Andersen, K.K., Arnaud, M., Asai, K., Ashikaga, S., Aymerich, S., Bessieres, P. and Boland, F., 2003. Essential Bacillus subtilis genes. Proceedings of the National Academy of Sciences, 100(8), (Web Link)

[3] Helgason, E., Økstad, O.A., Caugant, D.A., Johansen, H.A., Fouet, A., Mock, M., Hegna, I. and Kolstø, A.B., 2000. Bacillus anthracis, Bacillus cereus, and Bacillus thuringiensis—one species on the basis of genetic evidence. Appl. Environ. Microbiol., 66(6), (Web Link)

[4] Bioprospecting desert plant Bacillus endophytic strains for their potential to enhance plant stress tolerance
Ameerah Bokhari, Magbubah Essack, Feras F. Lafi, Cristina Andres-Barrao, Rewaa Jalal, Soha Alamoudi, Rozaimi Razali, Hanin Alzubaidy, Kausar H. Shah, Shahid Siddique, Vladimir B. Bajic, Heribert Hirt & Maged M. Saad
Scientific Reports volume 9, (Web Link)

[5] Sopuruchukwu Ire, F. and Chisom Onyenama, A. (2017) “Effects of Some Cultural Conditions on Keratinase Production by Bacillus licheniformis Strain NBRC 14206”, Journal of Advances in Biology & Biotechnology, 13(1), (Web Link)

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