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Isolation and structural characterization of levan produced by probiotic Bacillus tequilensis-GM from Tunisian fermented goat milk. Int J Biol Macromol 2019; 133:786-794. [DOI: 10.1016/j.ijbiomac.2019.04.130] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/12/2019] [Accepted: 04/16/2019] [Indexed: 01/26/2023]
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Pan S, Chen G, Wu R, Cao X, Liang Z. Non-sterile Submerged Fermentation of Fibrinolytic Enzyme by Marine Bacillus subtilis Harboring Antibacterial Activity With Starvation Strategy. Front Microbiol 2019; 10:1025. [PMID: 31156576 PMCID: PMC6533532 DOI: 10.3389/fmicb.2019.01025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/24/2019] [Indexed: 01/17/2023] Open
Abstract
Microbial fibrinolytic enzyme is a promising candidate for thrombolytic therapy. Non-sterile production of fibrinolytic enzyme by marine Bacillus subtilis D21-8 under submerged fermentation was realized at a mild temperature of 34°C, using a unique combination of starvation strategy and self-production of antibacterial agents. A medium composed of 18.5 g/L glucose, 6.3 g/L yeast extract, 7.9 g/L tryptone, and 5 g/L NaCl was achieved by conventional and statistical methods. Results showed efficient synthesis of fibrinolytic enzyme and antibacterial compounds required the presence of both yeast extract and tryptone in the medium. At shake-flask level, the non-sterile optimized medium resulted in higher productivity of fibrinolytic enzyme than the sterile one, with an enhanced yield of 3,129 U/mL and a production cost reduced by 24%. This is the first report dealing with non-sterile submerged fermentation of fibrinolytic enzyme, which may facilitate the development of feasible techniques for non-sterile production of raw materials for the preparation of potential drugs with low operation cost.
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Affiliation(s)
- Shihan Pan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Guiguang Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Rui Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Xiaoyan Cao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
| | - Zhiqun Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Microorganism and Enzyme Research Center of Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, China
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Xu WF, Ren HS, Ou T, Lei T, Wei JH, Huang CS, Li T, Strobel G, Zhou ZY, Xie J. Genomic and Functional Characterization of the Endophytic Bacillus subtilis 7PJ-16 Strain, a Potential Biocontrol Agent of Mulberry Fruit Sclerotiniose. MICROBIAL ECOLOGY 2019; 77:651-663. [PMID: 30178387 DOI: 10.1007/s00248-018-1247-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 08/13/2018] [Indexed: 06/08/2023]
Abstract
Bacillus sp. 7PJ-16, an endophytic bacterium isolated from a healthy mulberry stem and previously identified as Bacillus tequilensis 7PJ-16, exhibits strong antifungal activity and has the capacity to promote plant growth. This strain was studied for its effectiveness as a biocontrol agent to reduce mulberry fruit sclerotiniose in the field and as a growth-promoting agent for mulberry in the greenhouse. In field studies, the cell suspension and supernatant of strain 7PJ-16 exhibited biocontrol efficacy and the lowest disease incidence was reduced down to only 0.80%. In greenhouse experiments, the cell suspension (1.0 × 106 and 1.0 × 105 CFU/mL) and the cell-free supernatant (100-fold and 1000-fold dilution) stimulated mulberry seed germination and promoted mulberry seedling growth. In addition, to accurately identify the 7PJ-16 strain and further explore the mechanisms of its antifungal and growth-promoting properties, the complete genome of this strain was sequenced and annotated. The 7PJ-16 genome is comprised of two circular plasmids and a 4,209,045-bp circular chromosome, containing 4492 protein-coding genes and 116 RNA genes. This strain was ultimately designed as Bacillus subtilis based on core genome sequence analyses using a phylogenomic approach. In this genome, we identified a series of gene clusters that function in the synthesis of non-ribosomal peptides (surfactin, fengycin, bacillibactin, and bacilysin) as well as the ribosome-dependent synthesis of tasA and bacteriocins (subtilin, subtilosin A), which are responsible for the biosynthesis of numerous antimicrobial metabolites. Additionally, several genes with function that promote plant growth, such as indole-3-acetic acid biosynthesis, the production of volatile substances, and siderophores synthesis, were also identified. The information described in this study has established a good foundation for understanding the beneficial interactions between endophytes and host plants, and facilitates the further application of B. subtilis 7PJ-16 as an agricultural biofertilizer and biocontrol agent.
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Affiliation(s)
- Wei-Fang Xu
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
| | - Hui-Shuang Ren
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
| | - Ting Ou
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
| | - Ting Lei
- Institute of Sericulture Science and Technology Research, Chongqing, 400700, People's Republic of China
| | - Jun-Hong Wei
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
| | - Chuan-Shu Huang
- Institute of Sericulture Science and Technology Research, Chongqing, 400700, People's Republic of China
| | - Tian Li
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China
| | - Gary Strobel
- Department of Plant Sciences, Montana State University, Bozeman, MT, 59717, USA
| | - Ze-Yang Zhou
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China.
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China.
- College of Life Science, Chongqing Normal University, Chongqing, 400047, People's Republic of China.
| | - Jie Xie
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China.
- Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing, 400715, People's Republic of China.
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Evaluation of probiotic Bacillus subtilis P229 isolated from cheonggukjang and its application in soybean fermentation. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.06.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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55
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Chun BH, Kim KH, Jeong SE, Jeon CO. Genomic and metabolic features of the Bacillus amyloliquefaciens group- B. amyloliquefaciens, B. velezensis, and B. siamensis- revealed by pan-genome analysis. Food Microbiol 2018; 77:146-157. [PMID: 30297045 DOI: 10.1016/j.fm.2018.09.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 07/31/2018] [Accepted: 09/01/2018] [Indexed: 10/28/2022]
Abstract
The genomic and metabolic features of the Bacillus amyloliquefaciens group comprising B. amyloliquefaciens, B. velezensis, and B. siamensis were investigated through a pan-genome analysis combined with an experimental verification of some of the functions identified. All B. amyloliquefaciens group genomes were retrieved from GenBank and their phylogenetic relatedness was subsequently investigated. Genome comparisons of B. amyloliquefaciens, B. siamensis, and B. velezensis showed that their genomic and metabolic features were similar; however species-specific features were also identified. Energy metabolism-related genes are more enriched in B. amyloliquefaciens, whereas secondary metabolite biosynthesis-related genes are enriched in B. velezensis. Compared to B. amyloliquefaciens and B. siamensis, B. velezensis harbors more genes in its core-genome which are involved in the biosynthesis of antimicrobial compounds, as well as genes involved in d-galacturonate and d-fructuronate metabolism. B. amyloliquefaciens, B. siamensis, and B. velezensis all harbor a xanthine oxidase gene cluster (xoABCDE) in their core-genomes that is involved in metabolizing xanthine and uric acid to glycine and oxalureate. A reconstruction of B. amyloliquefaciens group metabolic pathways using their individual pan-genomes revealed that the B. amyloliquefaciens group strains have the ability to metabolize diverse carbon sources aerobically, or anaerobically, and can produce various metabolites such as lactate, ethanol, acetate, CO2, xylitol, diacetyl, acetoin, and 2,3-butanediol. This study therefore provides insights into the genomic and metabolic features of the B. amyloliquefaciens group.
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Affiliation(s)
- Byung Hee Chun
- Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Kyung Hyun Kim
- Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Sang Eun Jeong
- Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Che Ok Jeon
- Department of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea.
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56
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Hanafy AM, Al-Mutairi AA, Al-Reedy RM, Al-Garni SM. Phylogenetic affiliations ofBacillus amyloliquefaciensisolates produced by a bacteriocin-like substance in goat milk. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2018. [DOI: 10.1016/j.jtusci.2016.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Ahmed M. Hanafy
- Department of Biology, Faculty of Science, Taibah University, Madina, Saudi Arabia
| | - Adel A. Al-Mutairi
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Rasha M. Al-Reedy
- Department of Biology, Faculty of Science, Al-Taif University, Al-Taif, Saudi Arabia
| | - Saleh M. Al-Garni
- Department of Biology, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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57
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Mingmongkolchai S, Panbangred W. Bacillus probiotics: an alternative to antibiotics for livestock production. J Appl Microbiol 2018; 124:1334-1346. [PMID: 29316021 DOI: 10.1111/jam.13690] [Citation(s) in RCA: 173] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 12/16/2017] [Accepted: 12/29/2017] [Indexed: 12/16/2022]
Abstract
The use of probiotics as feed supplements in animal production has increased considerably over the last decade, particularly since the ban on antibiotic growth promoters in the livestock sector. Several Bacillus sp. are attractive for use as probiotic supplements in animal feed due to their ability to produce spores. Their heat stability and ability to survive the low pH of the gastric barrier represent an advantage over other probiotic micro-organisms. This review discusses important characteristics required for selection of Bacillus probiotic strains and summarizes the beneficial effect of Bacillus-based feed additives on animal production. Although the mechanism of action of Bacillus probiotics has not been fully elucidated, they are effective in improving the growth, survival and health status of terrestrial and aquatic livestock. Bacillus strains also have utility in bioremediation and can reduce nitrogenous waste, thereby improving environmental conditions and water quality. Finally, recent innovative approaches for using Bacillus spores in various applications are discussed.
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Affiliation(s)
- S Mingmongkolchai
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Faculty of Science, Mahidol University-Osaka University Collaborative Research Center for Bioscience and Biotechnology (MU-OU:CRC), Mahidol University, Bangkok, Thailand
| | - W Panbangred
- Department of Biotechnology, Faculty of Science, Mahidol University, Bangkok, Thailand.,Faculty of Science, Mahidol University-Osaka University Collaborative Research Center for Bioscience and Biotechnology (MU-OU:CRC), Mahidol University, Bangkok, Thailand
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58
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Buahom J, Siripornadulsil S, Siripornadulsil W. Feeding with Single Strains Versus Mixed Cultures of Lactic Acid Bacteria and Bacillus subtilis KKU213 Affects the Bacterial Community and Growth Performance of Broiler Chickens. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2018. [DOI: 10.1007/s13369-017-3045-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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59
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Fed-batch production of vanillin by Bacillus aryabhattai BA03. N Biotechnol 2018; 40:186-191. [DOI: 10.1016/j.nbt.2017.07.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 07/17/2017] [Accepted: 07/30/2017] [Indexed: 11/21/2022]
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60
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Tsukahara T, Inoue R, Nakayama K, Inatomi T. Inclusion of Bacillus amyloliquefaciens strain TOA5001 in the diet of broilers suppresses the symptoms of coccidiosis by modulating intestinal microbiota. Anim Sci J 2017; 89:679-687. [PMID: 29282825 DOI: 10.1111/asj.12980] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 11/17/2017] [Indexed: 11/30/2022]
Abstract
Coccidiosis is an intestinal parasitic infection and one of the most prevalent and economically damaging diseases of chickens. Furthermore, coccidia-induced mucogenesis promotes secondary colonization by Clostridium perfringens, a major pathogen of chickens that causes necrotic enteritis. Our previous work found that supernatant of a culture of Bacillus amyloliquefaciens strain TOA5001 (BA) inhibited the growth of C. perfringens on Gifu anaerobic broth medium. Accordingly, we evaluated the effectiveness of dietary BA administration in inhibiting C. perfringens colonization of the intestine in broilers that were experimentally infected with coccidia. Ten healthy broilers from a BA-supplemented (2 × 105 colony-forming units/g of feed) broiler group and 10 from a non-treated group were challenged with Eimeria tenella and E. maxima (5000 oocysts of each species/chick) at 28 days old. At 36 days old, five chicks from each group were slaughtered, whereas the remaining five in each group were killed at 49 days old. Dietary BA administration into Eimeria-challenged birds reduced coccidial symptoms such as intestinal lesions. It also modified the cecal microbiota through suppressing C. perfringens and E. coli colonization, and inducing domination of Faecalibacterium prausnitzii, the Lactobacillus group and unknown Lachnospiraceae genera by bacterial DNA-based metagenome analyses. B. amyloliquefaciens TOA5001 supplementation suppressed the symptoms of coccidiosis by modulating cecal microbiota in Eimeria-challenged broilers.
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Affiliation(s)
| | - Ryo Inoue
- Kyoto Prefectural University, Shimogamo, Kyoto, Japan
| | - Keizo Nakayama
- Kyoto Institute of Nutrition & Pathology, Ujitawara, Kyoto, Japan
| | - Takio Inatomi
- TOA Pharmaceutical Co. Ltd., Tokyo, Japan.,Inatomi Animal Hospital, Tokyo, Japan
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61
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Sadishkumar V, Jeevaratnam K. Purification and partial characterization of antilisterial bacteriocin produced byPediococcus pentosaceusKJBC11 fromIdlibatter fermented withPiper betleleaves. J Food Biochem 2017. [DOI: 10.1111/jfbc.12460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Vishwanathan Sadishkumar
- Department of Biochemistry and Molecular Biology; Pondicherry University; Puducherry, 605014 India
| | - Kadirvelu Jeevaratnam
- Department of Biochemistry and Molecular Biology; Pondicherry University; Puducherry, 605014 India
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Ilinskaya ON, Ulyanova VV, Yarullina DR, Gataullin IG. Secretome of Intestinal Bacilli: A Natural Guard against Pathologies. Front Microbiol 2017; 8:1666. [PMID: 28919884 PMCID: PMC5586196 DOI: 10.3389/fmicb.2017.01666] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022] Open
Abstract
Current studies of human gut microbiome usually do not consider the special functional role of transient microbiota, although some of its members remain in the host for a long time and produce broad spectrum of biologically active substances. Getting into the gastrointestinal tract (GIT) with food, water and probiotic preparations, two representatives of Bacilli class, genera Bacillus and Lactobacillus, colonize epithelium blurring the boundaries between resident and transient microbiota. Despite their minor proportion in the microbiome composition, these bacteria can significantly affect both the intestinal microbiota and the entire body thanks to a wide range of secreted compounds. Recently, insufficiency and limitations of pure genome-based analysis of gut microbiota became known. Thus, the need for intense functional studies is evident. This review aims to characterize the Bacillus and Lactobacillus in GIT, as well as the functional roles of the components released by these members of microbial intestinal community. Complex of their secreted compounds is referred by us as the "bacillary secretome." The composition of the bacillary secretome, its biological effects in GIT and role in counteraction to infectious diseases and oncological pathologies in human organism is the subject of the review.
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Affiliation(s)
| | - Vera V. Ulyanova
- Department of Microbiology, Kazan Federal UniversityKazan, Russia
| | | | - Ilgiz G. Gataullin
- Department of Surgery and Oncology, Regional Clinical Cancer CenterKazan, Russia
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63
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Elshaghabee FMF, Rokana N, Gulhane RD, Sharma C, Panwar H. Bacillus As Potential Probiotics: Status, Concerns, and Future Perspectives. Front Microbiol 2017; 8:1490. [PMID: 28848511 PMCID: PMC5554123 DOI: 10.3389/fmicb.2017.01490] [Citation(s) in RCA: 421] [Impact Index Per Article: 60.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 07/24/2017] [Indexed: 01/09/2023] Open
Abstract
Spore-forming bacilli are being explored for the production and preservation of food for many centuries. The inherent ability of production of large number of secretory proteins, enzymes, antimicrobial compounds, vitamins, and carotenoids specifies the importance of bacilli in food chain. Additionally, Bacillus spp. are gaining interest in human health related functional food research coupled with their enhanced tolerance and survivability under hostile environment of gastrointestinal tract. Besides, bacilli are more stable during processing and storage of food and pharmaceutical preparations, making them more suitable candidate for health promoting formulations. Further, Bacillus strains also possess biotherapeutic potential which is connected with their ability to interact with the internal milieu of the host by producing variety of antimicrobial peptides and small extracellular effector molecules. Nonetheless, with proposed scientific evidences, commercial probiotic supplements, and functional foods comprising of Bacillus spp. had not gained much credential in general population, since the debate over probiotic vs pathogen tag of Bacillus in the research and production terrains is confusing consumers. Hence, it’s important to clearly understand the phenotypic and genotypic characteristics of selective beneficial Bacillus spp. and their substantiation with those having GRAS status, to reach a consensus over the same. This review highlights the probiotic candidature of spore forming Bacillus spp. and presents an overview of the proposed health benefits, including application in food and pharmaceutical industry. Moreover, the growing need to evaluate the safety of individual Bacillus strains as well as species on a case by case basis and necessity of more profound analysis for the selection and identification of Bacillus probiotic candidates are also taken into consideration.
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Affiliation(s)
| | - Namita Rokana
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
| | - Rohini D Gulhane
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
| | - Chetan Sharma
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
| | - Harsh Panwar
- Department of Dairy Microbiology, College of Dairy Science and Technology, Guru Angad Dev Veterinary and Animal Sciences UniversityLudhiana, India
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64
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Avcı A, Çağrı-Mehmetoğlu A, Arslan D. Production of antimicrobial substances by a novel Bacillus strain inhibiting Salmonella Typhimurium. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.02.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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65
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Prajanban BO, Jangpromma N, Araki T, Klaynongsruang S. Antimicrobial effects of novel peptides cOT2 and sOT2 derived from Crocodylus siamensis and Pelodiscus sinensis ovotransferrins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:860-869. [PMID: 28159460 DOI: 10.1016/j.bbamem.2017.01.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 01/14/2017] [Accepted: 01/28/2017] [Indexed: 10/20/2022]
Abstract
In light of the increasing threat of bacterial drug resistance to human health on a global scale, research and development of antimicrobial peptides as a novel class of potent antibiotics has gained considerable attention. The present study focuses on the structural evaluation and membrane interaction of two new cationic antimicrobial peptides, cOT2 and sOT2, derived from Siamese crocodile (Crocodylus siamensis) and Chinese softshell turtle (Pelodiscus sinensis) ovotransferrins. Here, cOT1 (+3) and sOT1 (+3) were derived from reptile ovotransferrins by chromatographic purification and characterized by mass spectrometry and N-terminal sequencing analysis. In order to increase the antimicrobial efficacy, two novel peptides, cOT2 (+6) and sOT2 (+5), were designed and synthesized as "naturally-engineered" by primary amino acid sequence extension of cOT1 and sOT1, respectively. These rational designs of modified peptides were assayed in term of antimicrobial activity. These peptides display strong antimicrobial activity against several bacterial strains, e.g. Vibrio cholerae, Bacillus megaterium, and Bacillus pumilus TISTR 905, with MICs of 7-16.1μM. In terms of structural conformation in mimic environments, CD spectroscopic analysis of the secondary peptides structure features revealed fairly the similarity on α-helical content with magainin II. Hence, the modes of actions have been speculated as toroidal and carpet model. Furthermore, the disruption of intact bacterial cells induced by cOT2 and sOT2 was investigated by SEM and AFM. The results provided evidence that cOT2 and sOT2 have the potential to cause different morphological changes of bacterial cells and that these effects can be enhanced by increasing the peptide concentration.
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Affiliation(s)
- Bung-On Prajanban
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Nisachon Jangpromma
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; Office of the Dean, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Tomohiro Araki
- Department of Bioscience, School of Agriculture, Tokai University, Aso, Kumamoto, 869-140, Japan
| | - Sompong Klaynongsruang
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand; Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand.
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66
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Olmos Soto J. Bacillus Probiotic Enzymes: External Auxiliary Apparatus to Avoid Digestive Deficiencies, Water Pollution, Diseases, and Economic Problems in Marine Cultivated Animals. ADVANCES IN FOOD AND NUTRITION RESEARCH 2017; 80:15-35. [PMID: 28215324 DOI: 10.1016/bs.afnr.2016.11.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Exploitation of marine fishes is the main source of several life-supporting feed compounds such as proteins, lipids, and carbohydrates that maintain the production of most trading marine organisms by aquaculture. However, at this rate the marine inventory will go to the end soon, since fishery resources are finite. In this sense, the availability of the principal ingredients obtained from marine fishes is going to decrease considerably, increasing the diet prices and affecting the economy of this activity. Therefore, aquaculture industry needs to find nonexpensive land unconventional resources of protein, carbohydrates, and lipids and use bacterial probiotics to improve digestion-assimilation of these unfamiliar compounds. Bacillus subtilis is a cosmopolitan probiotic bacterium with a great enzymatic profile that could improve nutrient digestion-assimilation, induce healthy growth, and avoid water pollution, decreasing economic problems and increasing yields in the aquaculture industry. In this chapter, we present how Bacillus enzymes can help marine animals to assimilate nutrients from unconventional and economic plant resources.
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Affiliation(s)
- Jorge Olmos Soto
- Molecular Microbiology Laboratory, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Ensenada, Baja California, Mexico.
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67
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Liu H, Wang S, Cai Y, Guo X, Cao Z, Zhang Y, Liu S, Yuan W, Zhu W, Zheng Y, Xie Z, Guo W, Zhou Y. Dietary administration of Bacillus subtilis HAINUP40 enhances growth, digestive enzyme activities, innate immune responses and disease resistance of tilapia, Oreochromis niloticus. FISH & SHELLFISH IMMUNOLOGY 2017; 60:326-333. [PMID: 27919757 DOI: 10.1016/j.fsi.2016.12.003] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 11/27/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
The probiotic properties of Bacillus subtilis HAINUP40 isolated from the aquatic environment, and the effects of dietary administration of B. subtilis HAINUP40 on the growth performance, intestinal probiotic recovery, digestive enzyme activities, innate immunity and disease resistance of tilapia (Oreochromis niloticus) were evaluated. The probiotic properties investigated include tolerance to simulated gastrointestinal stress, auto-aggregation, cell surface hydrophobicity and extracellular enzyme production. The cell number of B. subtilis changed little after 4 h in simulated gastric fluid at pH = 2.0, 3.0, 4.0 and simulated intestinal fluid at pH = 6.8.B.subtilis HAINUP40 revealed strong auto-aggregation property (34.6-87.0%) after 24 h incubation period. It exhibited significant cell surface hydrophobicity in xylene (28.8%) and chloroform (41.3%) and produced extracellular proteases and amylase. After tilapia (mean weight = 95 ± 8 g) were fed with a diet containing 108 cfu/g B. subtilis HAINUP40, their final body weight, percent weight gain (PWG), specific growth rate (SGR), total antioxidant capacity (T-AOC) and serum superoxide dismutase (SOD) increased significantly (p < 0.05) after 8 weeks; feed conversion rate (FCR) is significantly lower (p < 0.05) after 8 weeks; the protease and amylase activity in the digestive tract increased significantly (p < 0.05) after 4 and 8 weeks; and respiratory bursts and serum lysozyme activity increased significantly (p < 0.05) after 2 weeks. Moreover, being challenged with pathogenic Streptococcus agalactiae for 2 weeks, the relative percent survival (RPS%) is 52.94%. The results of this study strongly suggest that dietary supplement of B. subtilis HAINUP40 can effectively enhances the growth performance, immune response, and disease resistance of Nile tilapia.
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Affiliation(s)
- Haitian Liu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Shifeng Wang
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Yan Cai
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Xiaohui Guo
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Zhenjie Cao
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Yongzheng Zhang
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Shubin Liu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Wei Yuan
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Weiwei Zhu
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Yu Zheng
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Zhenyu Xie
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Weiliang Guo
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China
| | - Yongcan Zhou
- Key Laboratory of Tropical Biological Resources of Ministry of Education, College of Marine Sciences, Hainan University, Haikou 570228, PR China.
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Parveen Rani R, Anandharaj M, Hema S, Deepika R, David Ravindran A. Purification of Antilisterial Peptide (Subtilosin A) from Novel Bacillus tequilensis FR9 and Demonstrate Their Pathogen Invasion Protection Ability Using Human Carcinoma Cell Line. Front Microbiol 2016; 7:1910. [PMID: 27990138 PMCID: PMC5133052 DOI: 10.3389/fmicb.2016.01910] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 11/15/2016] [Indexed: 11/13/2022] Open
Abstract
This study focuses on isolation, screening, and characterization of novel probiotics from gastrointestinal tract of free-range chicken (Gallus gallus domesticus). Fifty seven colonies were isolated and three isolates (FR4, FR9, and FR12) were selected and identified as Lactobacillus gasseri FR4, Bacillus tequilensis FR9, and L. animalis FR12 by 16S rRNA sequencing. Three strains were able to survive in stimulated acidic and bile conditions and inhibit the growth of pathogens. Especially, FR9 exhibited maximum inhibition against Listeria monocytogenes and none of them exhibited hemolytic activity. Native-PAGE revealed the presence of low molecular weight (3.4-5.0 KDa) antimicrobial peptide. The peptide was further purified by Sephadex G-50 column and RP-HPLC using C18 column. N-terminal amino acid sequencing of antimicrobial peptide showed 100% consensus to antilisterial peptide Subtilosin A and SboA gene was amplified from FR9 genome. FR9 showed maximum aggregation activity, exopolysaccharide production (85.46 mg/L) and cholesterol assimilation (63.12 ± 0.05 μg/mL). Strong adhesion property (12.6%) and pathogen invasion protection ability was revealed by B. tequilensis FR9 towards HCT-116 human colon carcinoma cell line. This is the first study to demonstrate antilisterial Subtilosin A production of B. tequilensis. Our results indicate that B. tequilensis FR9 strain furnish the essential characteristics of a potential probiotics and might be incorporated into human and animal food supplements.
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Affiliation(s)
- Rizwana Parveen Rani
- Department of Biology, The Gandhigram Rural Institute – Deemed UniversityGandhigram, India
| | | | - Subramani Hema
- Department of Biology, The Gandhigram Rural Institute – Deemed UniversityGandhigram, India
| | - Ramasamy Deepika
- Department of Biology, The Gandhigram Rural Institute – Deemed UniversityGandhigram, India
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Yang J, Qian K, Zhang W, Xu Y, Wu Y. Effects of chromium-enriched bacillus subtilis KT260179 supplementation on chicken growth performance, plasma lipid parameters, tissue chromium levels, cecal bacterial composition and breast meat quality. Lipids Health Dis 2016; 15:188. [PMID: 27821122 PMCID: PMC5100260 DOI: 10.1186/s12944-016-0355-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 10/21/2016] [Indexed: 12/04/2022] Open
Abstract
Background Both chromium (Cr) and probiotic bacillus own the virtues of regulating animal metabolism and meat quality. Purpose of this study was to evaluate the efficiency of supplemental Cr and bacillus in the form of chromium-enriched Bacillus subtilis KT260179 (CEBS) on chicken growth performance, plasma lipid parameters, tissue chromium levels, cecal bacterial composition and breast meat quality. Methods Six hundred of 1-day-old Chinese Huainan Partridge chickens were divided into four groups randomly: Control, inorganic Cr, Bacillus subtilis, and CEBS. The feed duration was 56 days. Results After 28 days of treatment, broiler feed CEBS or normal B. subtilis had higher body weights than control broiler, and after 56 days, chickens given either CEBS or B. subtilis had greater body weights than control broiler or those given inorganic Cr. Plasma total cholesterol, triglycerides, and low density lipoprotein cholesterol levels declined significantly in the CEBS group compared with the control, whereas plasma high density lipoprotein cholesterol levels increased significantly. The concentration of Cr in blood and breast muscle increased after CEBS and inorganic Cr supplementation. B. subtilis and CEBS supplementation caused a significant increase in the numbers of Lactobacillus and Bifidobacterium in the caecum, while the numbers of Escherichia coli and Salmonella decreased significantly compared to the control. Feed adding CEBS increased the lightness, redness, and yellowness of breast meat, improved the water-holding capacity, decreased the shear force and cooking loss. Conclusions In all, CEBS supplementation promoted body growth, improved plasma lipid parameters, increased tissue Cr concentrations, altered cecal bacterial composition and improved breast meat quality.
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Affiliation(s)
- Jiajun Yang
- The Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, No. 40 Nongke South Road, Hefei, 230031, Anhui, People's Republic of China
| | - Kun Qian
- The Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, No. 40 Nongke South Road, Hefei, 230031, Anhui, People's Republic of China.
| | - Wei Zhang
- The Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, No. 40 Nongke South Road, Hefei, 230031, Anhui, People's Republic of China
| | - Yayuan Xu
- The Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, No. 40 Nongke South Road, Hefei, 230031, Anhui, People's Republic of China
| | - Yijing Wu
- The Institute of Animal Husbandry and Veterinary Medicine, Anhui Academy of Agricultural Sciences, No. 40 Nongke South Road, Hefei, 230031, Anhui, People's Republic of China
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Woraprayote W, Malila Y, Sorapukdee S, Swetwiwathana A, Benjakul S, Visessanguan W. Bacteriocins from lactic acid bacteria and their applications in meat and meat products. Meat Sci 2016; 120:118-132. [PMID: 27118166 DOI: 10.1016/j.meatsci.2016.04.004] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 03/08/2016] [Accepted: 04/06/2016] [Indexed: 12/21/2022]
Abstract
Meat and meat products have always been an important part of human diet, and contain valuable nutrients for growth and health. Nevertheless, they are perishable and susceptible to microbial contamination, leading to an increased health risk for consumers as well as to the economic loss in meat industry. The utilization of bacteriocins produced by lactic acid bacteria (LAB) as a natural preservative has received a considerable attention. Inoculation of bacteriocin-producing LAB cell as starter or protective cultures is suitable for fermented meats, whilst the direct addition of bacteriocin as food additive is more preferable when live cells of LAB could not produce bacteriocin in the real meat system. The incorporation of bacteriocins in packaging is another way to improve meat safety to avoid direct addition of bacteriocin to meat. Utilization of bacteriocins can effectively contribute to food safety, especially when integrated into hurdle concepts. In this review, LAB bacteriocins and their applications in meat and meat products are revisited. The molecular structure and characteristics of bacteriocins recently discovered, as well as exemplary properties are also discussed.
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Affiliation(s)
- Weerapong Woraprayote
- National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand
| | - Yuwares Malila
- National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand
| | - Supaluk Sorapukdee
- Faculty of Agricultural Technology, King Mongkut's Institiute of Technology Ladkrabang (KMITL), Chalong-krung Road, Ladkrabang, Bangkok 10520, Thailand
| | - Adisorn Swetwiwathana
- Faculty of Agro-industry, King Mongkut's Institiute of Technology Ladkrabang (KMITL), Chalong-krung Road, Ladkrabang, Bangkok 10520, Thailand
| | - Soottawat Benjakul
- Department of Food Technology, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Wonnop Visessanguan
- National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Pathum Thani 12120, Thailand.
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Effects of chromium-enriched Bacillus subtilis KT260179 supplementation on growth performance, caecal microbiology, tissue chromium level, insulin receptor expression and plasma biochemical profile of mice under heat stress. Br J Nutr 2016; 115:774-81. [DOI: 10.1017/s0007114515005127] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AbstractThe aim of this study was to investigate the effect of providing supplementary Cr-enriched Bacillus subtilis (CEBS) to mice with regard to their growth performance, caecal microbiology, tissue Cr concentration, insulin receptor (IR) expression and plasma biochemical profile. A total of ninety-six Kunming strain mice were allocated to four different groups: control, CEBS, inorganic Cr and B. subtilis. After 15 d of treatment, mice that received CEBS or normal B. subtilis had higher body weights than control mice, and after 30 d mice given either CEBS or B. subtilis had greater body weights than control mice or those given inorganic Cr. The concentration of Cr in tissues (heart, liver, spleen, kidney and skeletal muscle) increased after CEBS supplementation. B. subtilis and CEBS supplementation caused a significant increase in the numbers of Lactobacillus and Bifidobacterium in the caecum, whereas the numbers of Escherichia coli and Staphylococcus decreased significantly compared with the control. The levels of IR RNA and protein in skeletal muscles increased significantly. Plasma glucose, total cholesterol, TAG and LDL-cholesterol levels declined significantly in the CEBS group compared with the control group, whereas plasma insulin and HDL-cholesterol levels increased significantly. In conclusion, CEBS supplementation enhanced the regulation of body growth, increased tissue organic Cr concentrations, altered caecal microbiota and enhanced IR expression to produce significant changes in plasma biochemistry.
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AlGburi A, Volski A, Cugini C, Walsh EM, Chistyakov VA, Mazanko MS, Bren AB, Dicks LMT, Chikindas ML. Safety Properties and Probiotic Potential of <i>Bacillus subtilis</i> KATMIRA1933 and <i>Bacillus amyloliquefaciens</i> B-1895. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/aim.2016.66043] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wu S, Zhou N, Li D, He S, Chen Y, Bai Y, Zhou M, He J, Wang C. Effects of Selenium on the Growth and Fermentation Properties of Se-Enriched B
acillus Subtilis
J-2. J Food Biochem 2015. [DOI: 10.1111/jfbc.12184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shan Wu
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | - Na Zhou
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | - Dongsheng Li
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | - Sai He
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | - Yang Chen
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | - Ye Bai
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
| | | | - Jianjun He
- Institute of Processing of Agricultural Produce and Nuclear Agricultural Research; Hubei Academy of Agricultural Sciences; Wuhan China
| | - Chao Wang
- Hubei Collaborative Innovation Center of Industrial Fermentation; Research Center of Food Fermentation Engineering and Technology of Hubei; Key Laboratory of Fermentation Engineering (Ministry of Education); Hubei University of Technology; Wuhan 430068 China
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Torres MJ, Petroselli G, Daz M, Erra-Balsells R, Audisio MC. Bacillus subtilis subsp. subtilis CBMDC3f with antimicrobial activity against Gram-positive foodborne pathogenic bacteria: UV-MALDI-TOF MS analysis of its bioactive compounds. World J Microbiol Biotechnol 2015; 31:929-40. [PMID: 25820813 DOI: 10.1007/s11274-015-1847-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 03/21/2015] [Indexed: 02/07/2023]
Abstract
In this work a new Bacillus sp. strain, isolated from honey, was characterized phylogenetically. Its antibacterial activity against three relevant foodborne pathogenic bacteria was studied; the main bioactive metabolites were analyzed using ultraviolet matrix assisted laser desorption-ionization mass spectrometry (UV-MALDI MS). Bacillus CBMDC3f was phylogenetically characterized as Bacillus subtilis subsp. subtilis after rRNA analysis of the 16S subunit and the gyrA gene (access codes Genbank JX120508 and JX120516, respectively). Its antibacterial potential was evaluated against Listeria monocytogenes (9 strains), B. cereus (3 strains) and Staphylococcus aureus ATCC29213. Its cell suspension and cell-free supernatant (CFS) exerted significant anti-Listeria and anti-S. aureus activities, while the lipopeptides fraction (LF) also showed anti-B. cereus effect. The UV-MALDI-MS analysis revealed surfactin, iturin and fengycin in the CFS, whereas surfactin predominated in the LF. The CFS from CBMDC3f contained surfactin, iturin and fengycin with four, two and four homologues per family, respectively, whereas four surfactin, one iturin and one fengycin homologues were identified in the LF. For some surfactin homologues, their UV-MALDI-TOF/TOF (MS/MS; Laser Induced Decomposition method, LID) spectra were also obtained. Mass spectrometry analysis contributed with relevant information about the type of lipopeptides that Bacillus strains can synthesize. From our results, surfactin would be the main metabolite responsible for the antibacterial effect.
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Affiliation(s)
- M J Torres
- Instituto de Investigaciones para la Industria Química (INIQUI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Salta, Av.Bolivia 5150, 4400, Salta, Argentina
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