Bacillus megaterium: amino acid producer and probiotic for farm animals (review)

2020 ◽  
pp. 67-75
Author(s):  
N. Buryakov ◽  
S. Shchukina ◽  
K. Gorst
Keyword(s):  
Amino Acids ◽  
Bacillus Megaterium ◽  
Feed Additives ◽  
Farm Animals ◽  
Annual Growth Rate ◽  
Microbiological Synthesis ◽  
Efficient System ◽  
Progressive Development ◽  
Wide Range ◽  
Limiting Amino Acids

Different directions of microbiological synthesis are actively used in the industry of feed and feed additives for farm animals. More than 50 years of industrial production of amino acids is carried out with the help of biotechnology and the annual growth rate of production is 5–7 %. Amino acids are produced industrially during fermentation using highly effective strains of different types of bacteria. With the progressive development of microbiological technologies and the study of the composition of animal microflora the discovery of new species of microorganisms-producers of useful substances including species Bacillus megaterium, which belong to the bacteria-polyproducts, because their cells are able to develop many substances of different chemical nature: amino acids, proteases, antibiotics, peptides, vitamins, bacteriocins and a number of other compounds. They have a highly efficient system of synthesis and transport of proteins from the cell, grow on a variety of affordable and inexpensive carbon substrates and are non-pathogenic to plants, animals and humans and do not produce alkaline proteases in the environment. Bacillus megaterium is stable in a wide range of pH and at high temperatures, and thus stably retain their properties during production cycles as well as during storage and transportation of the resulting products. The costs of growing Bacillus megaterium are relatively low and with a good yield and relatively low resource intensity of production make it economically viable. Probiotics based on Bacillus megaterium as well as strains of bacteria with increased synthesis of limiting amino acids are promising for the animal feeding industry directions of applied microbiological synthesis.

scholarly journals Expression of Bacillus ginsengihumi M2.11 bacterial phytase by recombinant Pichia pastoris strains

2021 ◽  
Vol 36 ◽  
pp. 07013
Author(s):  
Daria L. Itkina ◽  
Aliya D. Suleymanova ◽  
Margarita R. Sharipova
Keyword(s):  
Phytic Acid ◽  
Recombinant Proteins ◽  
Genetic Manipulation ◽  
Organic Phosphorus ◽  
Maximum Activity ◽  
Feed Additives ◽  
Animal Nutrition ◽  
Efficient System ◽  
Short Period ◽  
Wide Range

Phytic acid is the main storage form of organic phosphorus. Due to its structural features, phosphorus in phytate is inaccessible for assimilation by animals. Moreover, remaining inaccessible reservoir of phosphorus for animal nutrition, phytic acid is capable of forming insoluble complex salts, which lead to soil and water pollution. Мicrobial enzymes - phytases, capable of decomposing phytic acid to organic phosphorus are being used as feed additives in animal nutrition to solve this problem. Thus, search and development of technologies for the production of enzymes on an industrial scale are the most urgent. Methylotrophic yeast P. pastoris are widely used in biotechnology, as an efficient system for the recombinant proteins expression. They have many advantages, including rapid growth on inexpensive media, a wide range of molecular tools for genetic manipulation in optimizing production processes, they are safe for humans and animals, carry-out many post-translational modifications and produce recombinant proteins intracellularly or extracellularly within a short period of time. It was found that the recombinant P. pastoris strains pPINK-LC-α-MF -phyC, pPINK-HC-α-amyl -phyC, pPINK-LC-α-amyl -phyC, pPINK-HC-α-MF -phyC are able to produce and to secrete B. ginsengihumi bacterial phytase M 2.11 phyC. The maximum activity was observed in the pPINK-LC-α-MF strain – 2.6 (U / mg). Recombinant B. ginsengihumi M 2.11 phytases exhibited high activity in a wide pH range from 2.5 to 9.0. The MF-phyC-HC construction is pH stable. The temperature optimum of all recombinant phytases corresponds to 37 ° C; recombinant phytases retain their activity in the range from -80 to 90C.

scholarly journals PHYSIOLOGICAL-BIOCHEMICAL AND VETERINARY AND SANITARY EVALUATION OF MILK AND BEEF UNDER THE CONDITIONS OF TECHNOGENIC LOADING AND FEEDING OF FEED ADDITIVES

2020 ◽  
Vol 21 (2) ◽  
pp. 40-47
Author(s):  
V. O. Velychko
Keyword(s):  
Heavy Metals ◽  
Agricultural Land ◽  
Plant Protection ◽  
Raw Materials ◽  
Well Being ◽  
Feed Additives ◽  
Biologically Active ◽  
Farm Animals ◽  
Mineral Fertilizers ◽  
Wide Range

In recent decades, due to various circumstances, in Ukraine and around the world, insufficient attention is paid to preserving the ecological well-being of the environment. Man-caused load on the environment, including contamination of agricultural land with various xenobiotics, in particular heavy metals, in some regions exceeds acceptable levels. Their toxicity is realized slowly and is manifested by immunodeficiency of animals, and can also cause mutagenic, teratogenic and embryotoxic effects. This is observed not only as a result of the Chernobyl tragedy, but also the growing, unregulated use of mineral fertilizers, plant protection products, virtually no disposal of waste of various origins, as well as emissions from industrial, chemical and mining enterprises, vehicles, which poses a growing threat to health. animals and humans. Numerous researchers (in particular Kravtsiv, 2005, Fedoruk & Humenyuk, 1999, Pylypiv & Fedoruk, 2000, Rivis et al., 1995, Velychko, 2007) point out that a significant part of this belongs to the anthropogenic entry of heavy metals into the biosphere. Given the wide range of biological and toxic effects of xenobiotics in general, and heavy metals in particular, it should be noted that they cause not only problems in animal welfare, but also negatively affect the quality of products made from animals kept and raised in man-made contaminated areas. And hence the health of people, maintaining their ability to work, which is a national priority. It should be borne in mind that the ability to accumulate chemical, toxic elements by organisms is determined not only by the geochemistry of the environment, but also by the biological nature and biochemical chain through which organisms and the environment (soil-plant-animal- human). Therefore, it is especially important for animal husbandry to improve the feeding rations of animals kept under man-made load with the use of safe sorbents and biologically active additives, which will contribute to obtaining quality raw materials and quality food, including dairy and meat. This confirms that a particularly important task of science, including biological and veterinary in the field of environmental physiology is a comprehensive study of the harmful effects of anthropogenic and man-made factors on environmental objects, especially farm animals, which provide raw materials to the processing industry and human food. Particular attention needs to be paid to the development of effective measures to reduce the negative man-made pressure on bio-cenosis, including on productive animals kept in conditions of ecological, technogenic risk, optimization of physiological and technological parameters of their existence with application in feeding, effective, payback, correcting feed additives and biologically active substances that, undoubtedly, will promote improvement of quality and safety of production, which is used in human nutrition.

scholarly journals The Potential Role of Probiotics (nutraceuticals) in Gut Health of Domestic Animals; an Alternative to Antibiotic Growth Promoters

2019 ◽  
Vol 69 (4) ◽  
pp. 1169 ◽  
Author(s):  
A. NAWAB ◽  
W. LIU ◽  
G. LI ◽  
F. IBTISHAM ◽  
D P. FOX ◽  
...  
Keyword(s):  
Animal Health ◽  
Scientific Information ◽  
Domestic Animals ◽  
Feed Additives ◽  
Production Performance ◽  
Farm Animals ◽  
Gut Health ◽  
Growth Promoters ◽  
Wide Range ◽  
Antibiotic Growth Promoters

The term gut health is currently becoming more important for domestic animals including poultry. Gut health refers to the fundamental organ system which covers multiple positive functions like effective digestion, stabilizing intestinal microbiota, gut pH and modulation of effective immune response. Gut health depends on proper balance of microbial population. A wide range of feed and pathogen associated factors influence this balance, and adversely affect the animal health status and production performance. Antibiotic stimulators have been used in farm animals to achieve maximum production. But drug resistance and residual effects of antibiotics in animal products (milk, meat and egg etc.) have raised serious issues in human life. Therefore, The European Union (EU) has strictly banned the application of antibiotic stimulators in livestock nutrition in several others countries including China. As a result, an alternative to antibiotic growth promoters are required to support the profitable and sustainable animal production system. Probiotics as nutraceuticals has been categorized as an alternative natural feed supplement for commercial utilization. Such products have been recognized as safe feed additives in animal industry. Very few studies have comparatively described the effect of probiotics on gut health of domestic animals. Therefore, the aim of this review is not only to explore the beneficial effects of probiotics in improving gut health of domestic animals as an alternative to antibiotic growth promoters, but also to evaluate the probiotics associated health and risk factors, and to provide comprehensive scientific information for researchers, scientists and commercial producers.

Registration of animal rabies in Krasnodar region

2020 ◽  
pp. 3-4
Author(s):  
Oleg Yu. Chernykh ◽  
◽  
Vadim A. Bobrov ◽  
Sergey N. Zabashta ◽  
Roman A. Krivonos ◽  
...  
Keyword(s):  
Urban Form ◽  
Animal Species ◽  
Farm Animals ◽  
Natural Focus ◽  
Dead End ◽  
Wide Range ◽  
Epizootic Process ◽  
Krasnodar Region ◽  
Spread Of Infection ◽  
Reporting Data

Rabies remains a constant threat to humanity in many parts of the world. At the same time, scientifically grounded antiepizootic measures should be based on the peculiarities of the regional epizootology of this zooanthroponosis. The authors studied the epizootological and statistical reporting data of the Kropotkin Regional Veterinary Laboratory, presented an analysis of the registration of rabies in animals in Krasnodar region. From the obtained data, it should be noted that despite the wide range of animals involved in the epizootic process of rabies infection in Krasnodar region, dogs, cats and foxes play a major role in the reservation and spread of infection, which account for 78.6. Of the total number of registered cases, 15.5% falls on foxes, that indicates the natural focus of the disease, along with the manifestation of the disease in an urban form. At the same time, stray and neglected dogs and cats, which occupy a significant place among the total number of sick animals, are also sources and spread of the infection. Thus farm animals (8.3% of the total number of infected animals) are a biological dead end for the infection. Isolated cases of the disease were noted in muskrat, donkey, raccoon, raccoon dog, marten, ferret and jackal. The authors also established the specific morbidity of various animal species with rabies infection, that is an important aspect in the development and implementation of antiepizootic measures complex

scholarly journals Autophagy Deficiency by Atg4B Loss Leads to Metabolomic Alterations in Mice

Metabolites ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 481
Author(s):  
Gemma G. Martínez-García ◽  
Raúl F. Pérez ◽  
Álvaro F. Fernández ◽  
Sylvere Durand ◽  
Guido Kroemer ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Amino Acids ◽  
Mammalian Cells ◽  
Tissue Homeostasis ◽  
In Vivo Studies ◽  
Protective Mechanism ◽  
Cardiac Damage ◽  
Wide Range ◽  
First Time

Autophagy is an essential protective mechanism that allows mammalian cells to cope with a variety of stressors and contributes to maintaining cellular and tissue homeostasis. Due to these crucial roles and also to the fact that autophagy malfunction has been described in a wide range of pathologies, an increasing number of in vivo studies involving animal models targeting autophagy genes have been developed. In mammals, total autophagy inactivation is lethal, and constitutive knockout models lacking effectors of this route are not viable, which has hindered so far the analysis of the consequences of a systemic autophagy decline. Here, we take advantage of atg4b−/− mice, an autophagy-deficient model with only partial disruption of the process, to assess the effects of systemic reduction of autophagy on the metabolome. We describe for the first time the metabolic footprint of systemic autophagy decline, showing that impaired autophagy results in highly tissue-dependent alterations that are more accentuated in the skeletal muscle and plasma. These changes, which include changes in the levels of amino-acids, lipids, or nucleosides, sometimes resemble those that are frequently described in conditions like aging, obesity, or cardiac damage. We also discuss different hypotheses on how impaired autophagy may affect the metabolism of several tissues in mammals.

scholarly journals Destruxin A Interacts with Aminoacyl tRNA Synthases in Bombyx mori

2021 ◽  
Vol 7 (8) ◽  
pp. 593
Author(s):  
Jingjing Wang ◽  
Alexander Berestetskiy ◽  
Qiongbo Hu
Keyword(s):  
Amino Acids ◽  
Protein Synthesis ◽  
Bombyx Mori ◽  
Metarhizium Anisopliae ◽  
Free Amino ◽  
Molecular Target ◽  
Trna Synthetases ◽  
Interaction Mode ◽  
Aminoacyl Trna Synthetases ◽  
Wide Range

Destruxin A (DA), a hexa-cyclodepsipeptidic mycotoxin produced by the entomopathogenic fungus Metarhizium anisopliae, exhibits insecticidal activities in a wide range of pests and is known as an innate immunity inhibitor. However, its mechanism of action requires further investigation. In this research, the interactions of DA with the six aminoacyl tRNA synthetases (ARSs) of Bombyx mori, BmAlaRS, BmCysRS, BmMetRS, BmValRS, BmIleRS, and BmGluProRS, were analyzed. The six ARSs were expressed and purified. The BLI (biolayer interferometry) results indicated that DA binds these ARSs with the affinity indices (KD) of 10−4 to 10−5 M. The molecular docking suggested a similar interaction mode of DA with ARSs, whereby DA settled into a pocket through hydrogen bonds with Asn, Arg, His, Lys, and Tyr of ARSs. Furthermore, DA treatments decreased the contents of soluble protein and free amino acids in Bm12 cells, which suggested that DA impedes protein synthesis. Lastly, the ARSs in Bm12 cells were all downregulated by DA stress. This study sheds light on exploring and answering the molecular target of DA against target insects.

Tissue Deposition of Zinc from a Zinc Chelate and from Inorganic Zinc in Rats

1994 ◽  
Vol 1994 ◽  
pp. 171-171 ◽  
Author(s):  
Ronan Power ◽  
Kevin Cashman ◽  
Albert Flynn
Keyword(s):  
Amino Acids ◽  
Tissue Distribution ◽  
Wistar Rats ◽  
Gel Filtration ◽  
Normal Diet ◽  
Farm Animals ◽  
Trace Minerals ◽  
Inorganic Salts ◽  
Male Wistar Rats ◽  
Differential Tissue

Some reports have suggested differential tissue deposition of dietary trace minerals such as Zinc (Zn) when supplied to farm animals either chelated to amino acids or as inorganic salts. To test this hypothesis, an experiment was conducted to determine the ultimate tissue distribution of Zinc in rats fed either a radioactively-labeled 65Zn-chelate or 65ZnSO4. The 65Zn-chelate was prepared by heating a solution of 65ZnSO4 and an equimolar mixture of glycine and methionine for 5 minutes at 90°C. The resulting chelate was then separated from unincorporated 65ZnSO4 by gel filtration chromatography. Ten 25-d old male wistar rats (mean weight 34.5 g) were randomized by weight into two groups (n = 5/group), fasted for 18 hours and given 0.4 ml (8 μg Zn, 1 μCi65Zn) of one or other labelled solution by gavage. Four hours later, animals were returned to their normal diet for the duration of the experiment. The 65Zn activity of the animals was determined two hours after administration and daily thereafter for 7 days.

The use of hydroxyproline analyses to predict the nutritional value of the protein in different animal tissues

1972 ◽  
Vol 27 (3) ◽  
pp. 475-481 ◽  
Author(s):  
Z. Dvořák
Keyword(s):  
Amino Acids ◽  
Nutritional Value ◽  
Amino Acid Content ◽  
Close Correlation ◽  
Regression Equations ◽  
Animal Tissues ◽  
Chemical Score ◽  
Limiting Amino Acids ◽  
Net Protein ◽  
Total Amino Acids

1. The amounts of available cystine and tyrosine in the protein of different animal tissues showed a close correlation with the level of hydroxyproline, and may be estimated from hydroxyproline values by regression equations.2. Estimates of ‘chemical score’ have been calculated from the content of hydroxyproline determined in a series of samples for which net protein utilization (NPU) for rats had also been determined. Chemical scores calculated as percentages of the total ‘essential+semiessential’ amino acid content of each material correlated closely with NPU, whereas scores calculated as percentages of total amino acids did not. ‘Methionine+cystine’ were calculated to be first limiting amino acids in every sample.

scholarly journals Impact of Foliar Application of Amino Acids on Total Phenols, Phenolic Acids Content of Different Mints Varieties under the Field Condition

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 599
Author(s):  
Živilė Tarasevičienė ◽  
Aloyzas Velička ◽  
Aurelija Paulauskienė
Keyword(s):  
Amino Acids ◽  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Foliar Application ◽  
Mentha Piperita ◽  
Total Phenolic ◽  
Total Phenol Content ◽  
Individual Response ◽  
Total Phenols ◽  
Wide Range

Phenolic compounds have a number of benefits to human health and can be used as preventive compounds for the development of some chronic diseases. Mentha plants are not only a good source of essential oils, but also contain significant levels of wide range of phenolic compounds. The aim of this research was to investigate the possibility to increase phenols content in Mentha plants under the foliar application with L-phenylalanine, L-tryptophan, L-tyrosine at two concentrations (100 mg L−1 and 200 mg L−1) and to create preconditions for using this plant for even more diverse purposes. Quantitative and qualitative analyses of phenols in mints were performed by HPLC method. Foliar application of amino acids increased the total phenol content from 1.22 to 3.51 times depending on the treatment and mint variety. The most pronounced foliar application to total phenols content was tryptophane especially in Mentha piperita “Swiss”. Mentha piperita “Swiss” was affected most by foliar application and the amount of total phenolic acids depending on the treatment ranged from 159.25 to 664.03 mg 100 g−1 (DW), respectively, non-sprayed and sprayed with tryptophane 100 mg L−1. Our results suggest that the biophenol content varies according to such factors as foliar application and variety, and every single mint variety has individual response to different applications of amino acids.

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