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Reang L, Bhatt S, Tomar RS, Joshi K, Padhiyar S, Bhalani H, Kheni J, Vyas UM, Parakhia MV. Extremozymes and compatible solute production potential of halophilic and halotolerant bacteria isolated from crop rhizospheric soils of Southwest Saurashtra Gujarat. Sci Rep 2024; 14:15704. [PMID: 38977706 PMCID: PMC11231302 DOI: 10.1038/s41598-024-63581-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 05/30/2024] [Indexed: 07/10/2024] Open
Abstract
Halophiles are one of the classes of extremophilic microorganisms that can flourish in environments with very high salt concentrations. In this study, fifteen bacterial strains isolated from various crop rhizospheric soils of agricultural fields along the Southwest coastline of Saurashtra, Gujarat, and identified by 16S rRNA gene sequencing as Halomonas pacifica, H. stenophila, H. salifodinae, H. binhaiensis, Oceanobacillus oncorhynchi, and Bacillus paralicheniformis were investigated for their potentiality to produce extremozymes and compatible solute. The isolates showed the production of halophilic protease, cellulase, and chitinase enzymes ranging from 6.90 to 35.38, 0.004-0.042, and 0.097-0.550 U ml-1, respectively. The production of ectoine-compatible solute ranged from 0.01 to 3.17 mg l-1. Furthermore, the investigation of the ectoine-compatible solute production at the molecular level by PCR showed the presence of the ectoine synthase gene responsible for its biosynthesis in the isolates. Besides, it also showed the presence of glycine betaine biosynthetic gene betaine aldehyde dehydrogenase in the isolates. The compatible solute production by these isolates may be linked to their ability to produce extremozymes under saline conditions, which could protect them from salt-induced denaturation, potentially enhancing their stability and activity. This correlation warrants further investigation.
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Affiliation(s)
- Likhindra Reang
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - Shraddha Bhatt
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India.
| | - Rukam Singh Tomar
- Crop Improvement Section, ICAR - Directorate of Groundnut Research, Junagadh, Gujarat, India
| | - Kavita Joshi
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - Shital Padhiyar
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - Hiren Bhalani
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - JasminKumar Kheni
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - U M Vyas
- Main Oilseed Research Station, Junagadh Agricultural University, Junagadh, Gujarat, India
| | - M V Parakhia
- Department of Biotechnology, Junagadh Agricultural University, Junagadh, Gujarat, India
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Cai X, Yi P, Chen X, Wu J, Lan G, Li S, Luo S, Huang F, Huang J, Shen P. Intake of compound probiotics accelerates the construction of immune function and gut microbiome in Holstein calves. Microbiol Spectr 2024; 12:e0190923. [PMID: 38651859 PMCID: PMC11237676 DOI: 10.1128/spectrum.01909-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 02/22/2024] [Indexed: 04/25/2024] Open
Abstract
Acquired immunity is an important way to construct the intestinal immune barrier in mammals, which is almost dependent on suckling. To develop a new strategy for accelerating the construction of gut microbiome, newborn Holstein calves were continuously fed with 40 mL of compound probiotics (containing Lactobacillus plantarum T-14, Enterococcus faecium T-11, Saccharomyces cerevisiae T-209, and Bacillus licheniformis T-231) per day for 60 days. Through diarrhea rate monitoring, immune index testing, antioxidant capacity detection, and metagenome sequencing, the changes in diarrhea incidence, average daily gain, immune index, and gut microbiome of newborn calves within 60 days were investigated. Results indicated that feeding the compound probiotics reduced the average diarrhea rate of calves by 42.90%, increased the average daily gain by 43.40%, raised the antioxidant indexes of catalase, superoxide dismutase, total antioxidant capacity, and Glutathione peroxidase by 22.81%, 6.49%, 8.33%, and 13.67%, respectively, and increased the immune indexes of IgA, IgG, and IgM by 10.44%, 4.85%, and 6.12%, respectively. Moreover, metagenome sequencing data showed that feeding the compound probiotics increased the abundance of beneficial strains (e.g., Lactococcus lactis and Bacillus massionigeriensis) and decreased the abundance of some harmful strains (e.g., Escherichia sp. MOD1-EC5189 and Mycobacterium brisbane) in the gut microbiome of calves, thus contributing to accelerating the construction of healthy gut microbiome in newborn Holstein calves. IMPORTANCE The unstable gut microbiome and incomplete intestinal function of newborn calves are important factors for the high incidence of early diarrhea. This study presents an effective strategy to improve the overall immunity and gut microbiome in calves and provides new insights into the application of compound probiotics in mammals.
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Affiliation(s)
- Xinghua Cai
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Research Center for Biological Science and Technology, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - Ping Yi
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Xuewen Chen
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
- Guangxi UBIT Biotechnology Co., Ltd., Nanning, China
| | - Junhua Wu
- National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Research Center for Biological Science and Technology, Guangxi Academy of Sciences, Nanning, Guangxi, China
| | - Ganqiu Lan
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Shijian Li
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Shasha Luo
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Fengdie Huang
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Jinrong Huang
- College of Animal Science and Technology, Guangxi University, Nanning, Guangxi, China
| | - Peihong Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, Guangxi, China
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Subramani AK, Ramachandra R, Thote S, Govindaraj V, Vanzara P, Raval R, Raval K. Engineering a recombinant chitinase from the marine bacterium Bacillus aryabhattai with targeted activity on insoluble crystalline chitin for chitin oligomer production. Int J Biol Macromol 2024; 264:130499. [PMID: 38462115 DOI: 10.1016/j.ijbiomac.2024.130499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/10/2024] [Accepted: 02/20/2024] [Indexed: 03/12/2024]
Abstract
Chitin, an abundant polysaccharide in India, is primary by-product of the seafood industry. Efficiently converting chitin into valuable products is crucial. Chitinase, transforms chitin into chitin oligomers, holds significant industrial potential. However, the crystalline and insoluble nature of chitin makes the conversion process challenging. In this study, a recombinant chitinase from marine bacteria Bacillus aryabhattai was developed. This enzyme exhibits activity against insoluble chitin substrates, chitin powder and flakes. The chitinase gene was cloned into the pET 23a plasmid and transformed into E. coli Rosetta pLysS. IPTG induction was employed to express chitinase, and purification using Ni-NTA affinity chromatography. Optimal chitinase activity against colloidal chitin was observed in Tris buffer at pH 8, temperature 55°C, with the presence of 400 mM sodium chloride. Enzyme kinetics studies revealed a Vmax of 2000 μmole min-1 and a Km of 4.6 mg mL-1. The highest chitinase activity against insoluble chitin powder and flakes reached 875 U mg-1 and 625 U mg-1, respectively. The chitinase demonstrated inhibition of Candida albicans, Fusarium solani, and Penicillium chrysogenum growth. Thin Layer Chromatography (TLC) and LC-MS analysis confirmed the production of chitin oligomers, chitin trimer, tetramer, pentamer, and hexamer, from chitin powder and flakes using recombinant chitinase.
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Affiliation(s)
- Arun Kumar Subramani
- Department of Chemical Engineering, National Institute of Technology, Karnataka 575025, India
| | - Reshma Ramachandra
- Department of Chemical Engineering, National Institute of Technology, Karnataka 575025, India
| | - Sachin Thote
- Department of Chemical Engineering, National Institute of Technology, Karnataka 575025, India
| | - Vishnupriya Govindaraj
- Department of Chemical Engineering, National Institute of Technology, Karnataka 575025, India
| | - Piyush Vanzara
- Department of Chemical Engineering, Vyavasayi Vidya Pratishthan Engineering College, Rajkot, Gujarat 360005, India
| | - Ritu Raval
- Department of Biotechnology, Manipal Academy of Higher Education (MAHE), Karnataka 576104, India.
| | - Keyur Raval
- Department of Chemical Engineering, National Institute of Technology, Karnataka 575025, India.
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Tejerina MR, Cabana MJ, Enríquez PA, Benítez-Ahrendts MR, Fonseca MI. Bacterial Strains Isolated from Stingless Bee Workers Inhibit the Growth of Apis mellifera Pathogens. Curr Microbiol 2024; 81:106. [PMID: 38418777 DOI: 10.1007/s00284-024-03618-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Accepted: 01/17/2024] [Indexed: 03/02/2024]
Abstract
Apis mellifera bees are an important resource for the local economy of various regions in Argentina and the maintenance of natural ecosystems. In recent years, different alternatives have been investigated to avoid the reduction or loss of colonies caused by pathogens and parasites such as Ascosphaera apis, Aspergillus flavus, and Paenibacillus larvae. We focused on bacterial strains isolated from the intestine of native stingless bees, to elucidate their antagonistic effect on diseases of A. mellifera colonies. For this purpose, worker bees of the species Tetragonisca fiebrigi, Plebeia spp., and Scaptotrigona jujuyensis were captured from the entrance to tree hives and transported to the laboratory, where their intestines were extracted. Twenty bacterial colonies were isolated from the intestines, and those capable of inhibiting enterobacteria in vitro and producing organic acids, proteases, and chitinases were selected. Four genera, Levilactobacillus, Acetobacter, Lactiplantibacillus, and Pantoea, were selected and identified by the molecular marker that codes for the 16S rRNA gene. For inhibition assays, cell suspensions and cell-free suspensions were performed. All treatments showed significant antibacterial effects, in comparison with the controls, against P. larvae and antifungal effects against A. apis and A. flavus. However, the mechanisms by which these bacteria inhibit the growth of these pathogens were not studied.
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Affiliation(s)
- Marcos Raúl Tejerina
- Cátedra de Microbiología, Sanidad Apícola y Meliponícola, Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, Alberdi 47, 4600, Jujuy, Argentina.
- Instituto de Ecorregiones Andinas (INECOA)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Bolivia 1239, San Salvador de Jujuy, Jujuy, Argentina.
| | - María José Cabana
- Cátedra de Microbiología, Sanidad Apícola y Meliponícola, Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, Alberdi 47, 4600, Jujuy, Argentina
| | - Pablo Adrián Enríquez
- Cátedra de Microbiología, Sanidad Apícola y Meliponícola, Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, Alberdi 47, 4600, Jujuy, Argentina
| | - Marcelo Rafael Benítez-Ahrendts
- Cátedra de Microbiología, Sanidad Apícola y Meliponícola, Facultad de Ciencias Agrarias, Universidad Nacional de Jujuy, Alberdi 47, 4600, Jujuy, Argentina
- Instituto de Ecorregiones Andinas (INECOA)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Avenida Bolivia 1239, San Salvador de Jujuy, Jujuy, Argentina
| | - María Isabel Fonseca
- Facultad de Ciencias Exactas, Químicas y Naturales. Instituto de Biotecnología "Dra. María Ebe Reca" (INBIOMIS), Laboratorio de Biotecnología Molecular, Universidad Nacional de Misiones, Misiones, Argentina
- CONICET, Buenos Aires, Argentina
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Shleeva MO, Kondratieva DA, Kaprelyants AS. Bacillus licheniformis: A Producer of Antimicrobial Substances, including Antimycobacterials, Which Are Feasible for Medical Applications. Pharmaceutics 2023; 15:1893. [PMID: 37514078 PMCID: PMC10383908 DOI: 10.3390/pharmaceutics15071893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/30/2023] Open
Abstract
Bacillus licheniformis produces several classes of antimicrobial substances, including bacteriocins, which are peptides or proteins with different structural composition and molecular mass: ribosomally synthesized by bacteria (1.4-20 kDa), non-ribosomally synthesized peptides and cyclic lipopeptides (0.8-42 kDa) and exopolysaccharides (>1000 kDa). Different bacteriocins act against Gram-positive or Gram-negative bacteria, fungal pathogens and amoeba cells. The main mechanisms of bacteriocin lytic activity include interaction of peptides with membranes of target cells resulting in structural alterations, pore-forming, and inhibition of cell wall biosynthesis. DNase and RNase activity for some bacteriocines are also postulated. Non-ribosomal peptides are synthesized by special non-ribosomal multimodular peptide synthetases and contain unnatural amino acids or fatty acids. Their harmful effect is due to their ability to form pores in biological membranes, destabilize lipid packaging, and disrupt the peptidoglycan layer. Lipopeptides, as biosurfactants, are able to destroy bacterial biofilms. Secreted polysaccharides are high molecular weight compounds, composed of repeated units of sugar moieties attached to a carrier lipid. Their antagonistic action was revealed in relation to bacteria, viruses, and fungi. Exopolysaccharides also inhibit the formation of biofilms by pathogenic bacteria and prevent their colonization on various surfaces. However, mechanism of the harmful effect for many secreted antibacterial substances remains unknown. The antimicrobial activity for most substances has been studied in vitro only, but some substances have been characterized in vivo and they have found practical applications in medicine and veterinary. The cyclic lipopeptides that have surfactant properties are used in some industries. In this review, special attention is paid to the antimycobacterials produced by B. licheniformis as a possible approach to combat multidrug-resistant and latent tuberculosis. In particular, licheniformins and bacitracins have shown strong antimycobacterial activity. However, the medical application of some antibacterials with promising in vitro antimycobacterial activity has been limited by their toxicity to animals and humans. As such, similar to the enhancement in the antimycobacterial activity of natural bacteriocins achieved using genetic engineering, the reduction in toxicity using the same approach appears feasible. The unique capability of B. licheniformis to synthesize and produce a range of different antibacterial compounds means that this organism can act as a natural universal vehicle for antibiotic substances in the form of probiotic cultures and strains to combat various types of pathogens, including mycobacteria.
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Affiliation(s)
- Margarita O Shleeva
- A.N. Bach Institute of Biochemistry, Federal Research Centre 'Fundamentals of Biotechnology', Russian Academy of Sciences, 119071 Moscow, Russia
| | - Daria A Kondratieva
- A.N. Bach Institute of Biochemistry, Federal Research Centre 'Fundamentals of Biotechnology', Russian Academy of Sciences, 119071 Moscow, Russia
| | - Arseny S Kaprelyants
- A.N. Bach Institute of Biochemistry, Federal Research Centre 'Fundamentals of Biotechnology', Russian Academy of Sciences, 119071 Moscow, Russia
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Li J, Tao Y, Li G, Feng C, Chen R, Hua M. Biological Processes for Pollution Control: Current Research and Emerging Technologies 2020. ARCHAEA (VANCOUVER, B.C.) 2021; 2021:9852531. [PMID: 34776792 PMCID: PMC8589500 DOI: 10.1155/2021/9852531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 07/19/2021] [Indexed: 12/03/2022]
Affiliation(s)
- Jin Li
- Qingdao University, Qingdao, China
| | - Yu Tao
- Chinese Academy of Sciences, Beijing, China
| | | | - Cuijie Feng
- Polytechnic University of Milan Piazza Leonardo da Vinci, Milan, Italy
| | - Rong Chen
- Xi'an University of Architecture and Technology, Xi'an, China
| | - Ming Hua
- Nanjing University, Nanjing, China
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