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Thomas J, Roy P, Ghosh A, Mete M, Sil SK, Das D. Prebiotic levan type fructan from Bacillus subtilis PR-C18 as a potent antibiofilm agent: Structural elucidation and in silico analysis. Carbohydr Res 2024; 538:109075. [PMID: 38564901 DOI: 10.1016/j.carres.2024.109075] [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: 12/10/2023] [Revised: 03/03/2024] [Accepted: 03/04/2024] [Indexed: 04/04/2024]
Abstract
The global demand for therapeutic prebiotics persuades the quest for novel exopolysaccharides that can retard the growth of pathobionts and healthcare-associated pathogens. In this regard, an exopolysaccharide (3.69 mg/mL) producing strain showing prebiotic and antibiofilm activity was isolated from indigenous pineapple pomace of Tripura and identified as Bacillus subtilis PR-C18. Zymogram analysis revealed EPS PR-C18 was synthesized by levansucrase (∼57 kDa) with a maximal activity of 4.62 U/mg. Chromatography techniques, FTIR, and NMR spectral data revealed the homopolymeric nature of purified EPS with a molecular weight of 3.40 × 104 Da. SEM and rheological study unveiled its microporous structure and shear-thinning effect. Furthermore, EPS PR-C18 showed remarkable emulsification, flocculation, water retention, water solubilization, and antioxidant activity. DSC-TGA data demonstrated its high thermostability and cytotoxicity analysis verified its nontoxic biocompatible nature. In addition, the antibiofilm activity of EPS PR-C18 was validated using molecular docking, molecular simulation, MM-GBSA and PCA studies, which exhibited its strong binding affinity (-20.79 kcal/moL) with PelD, a virulence factor from Pseudomonas aeruginosa. Together, these findings support the future exploitation of EPS PR-C18 as an additive or adjuvant in food and pharmaceutical sectors.
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Affiliation(s)
- Juanit Thomas
- Department of Bioengineering, NIT Agartala, Tripura, 799046, India
| | - Payel Roy
- Department of Bioengineering, NIT Agartala, Tripura, 799046, India
| | - Arabinda Ghosh
- Department of Computational Biology and Biotechnology, Mahapurusha Srimanta Sankaradeva Viswavidyalaya, Assam, 781032, India
| | - Megha Mete
- Department of Bioengineering, NIT Agartala, Tripura, 799046, India
| | - Samir Kumar Sil
- Department of Human Physiology, Tripura University, Tripura, 799022, India
| | - Deeplina Das
- Department of Bioengineering, NIT Agartala, Tripura, 799046, India.
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2
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Sahyoun AM, Wong Min M, Xu K, George S, Karboune S. Characterization of levans produced by levansucrases from Bacillus amyloliquefaciens and Gluconobacter oxydans: Structural, techno-functional, and anti-inflammatory properties. Carbohydr Polym 2024; 323:121332. [PMID: 37940238 DOI: 10.1016/j.carbpol.2023.121332] [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: 03/27/2023] [Revised: 08/09/2023] [Accepted: 08/23/2023] [Indexed: 11/10/2023]
Abstract
Levans of different structures and molecular weights (MW) can display various techno-functional and health-promoting properties. In the present study, selected levans were produced by the transfructosylation of sucrose catalyzed by levansucrases from Bacillus amyloliquefaciens and Gluconobacter oxydans, and their structural, techno-functional and anti-inflammatory properties were investigated. NMR and methylation/GC analysis confirmed the structure of β-(2, 6) levans. The structural characterization led to the classification of levans as high MW (HMW, ≥100 kDa), low MW (LMW, ≤20 kDa) and mix L/HMW ones. Levan with higher MW had more linear fructosyl units with fewer reducing ends and branching residues. LMW levan showed the highest foaming capacity and stability while HMW levan had the highest emulsion stability. HMW and mix L/HMW levans showed comparable water and oil-holding capacities, which were higher than LMW. HMW and mix L/HMW levans were found to have gelling properties at low concentrations. The rheological behaviour of HMW levan-based gel was a more viscous-like gel, while that of mix L/HMW levan-based one showed more elastic solid like-gel. The temperature also influenced the rheology of levan, showing that the mix L/HMW levan gel network was the most thermal stable as its viscoelasticity remained constant at the highest temperature (75 °C). Studies on the biological activity of levans of HMW and LMW revealed in-vitro anti-inflammatory properties as they significantly reduced the production of LPS-triggered pro-inflammatory cytokines in differentiated Caco-2 cells.
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Affiliation(s)
- Amal M Sahyoun
- Department of Food Science & Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Canada
| | - Muriel Wong Min
- Department of Food Science & Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Canada
| | - Ke Xu
- Department of Food Science & Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Canada
| | - Saji George
- Department of Food Science & Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Canada
| | - Salwa Karboune
- Department of Food Science & Agricultural Chemistry, McGill University, Ste-Anne-de-Bellevue, Canada.
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3
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Chelminiak-Dudkiewicz D, Machacek M, Dlugaszewska J, Wujak M, Smolarkiewicz-Wyczachowski A, Bocian S, Mylkie K, Goslinski T, Marszall MP, Ziegler-Borowska M. Fabrication and characterization of new levan@CBD biocomposite sponges as potential materials in natural, non-toxic wound dressing applications. Int J Biol Macromol 2023; 253:126933. [PMID: 37722631 DOI: 10.1016/j.ijbiomac.2023.126933] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/09/2023] [Accepted: 09/14/2023] [Indexed: 09/20/2023]
Abstract
Wound healing is a complex process; therefore, new dressings are frequently required to facilitate it. In this study, porous bacterial levan-based sponges containing cannabis oil (Lev@CBDs) were prepared and fully characterized. The sponges exhibited a suitable swelling ratio, proper water vapor transmission rate, sufficient thermal stability, desired mechanical properties, and good antioxidant and anti-inflammatory properties. The obtained Lev@CBD materials were evaluated in terms of their interaction with proteins, human serum albumin and fibrinogen, of which fibrinogen revealed the highest binding effect. Moreover, the obtained biomaterials exhibited antibacterial activity against Staphylococcus aureus and Pseudomonas aeruginosa, as well as being non-hemolytic material as indicated by hemolysis tests. Furthermore, the sponges were non-toxic and compatible with L929 mouse fibroblasts and HDF cells. Most significantly, the levan sponge with the highest content of cannabis oil, in comparison to others, retained its non-hemolytic, anti-inflammatory, and antimicrobial properties after prolonged storage in a climate chamber at a constant temperature and relative humidity. The designed sponges have conclusively proven their beneficial physicochemical properties and, at the preliminary stage, biocompatibility as well, and therefore can be considered a promising material for wound dressings in future in vivo applications.
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Affiliation(s)
- Dorota Chelminiak-Dudkiewicz
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
| | - Miloslav Machacek
- Department of Biochemical Sciences, Faculty of Pharmacy in Hradec Kralove, Charles University in Prague, Akademika Heyrovskeho 1203, 500-05 Hradec Kralove, Czech Republic
| | - Jolanta Dlugaszewska
- Department of Genetics and Pharmaceutical Microbiology, Poznan University of Medical Sciences, Rokietnicka 3, 60-806 Poznan, Poland
| | - Magdalena Wujak
- Department of Medicinal Chemistry, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Aleksander Smolarkiewicz-Wyczachowski
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - Szymon Bocian
- Department of Environmental Chemistry and Bioanalysis, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - Kinga Mylkie
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland
| | - T Goslinski
- Chair and Department of Chemical Technology of Drugs, Poznan University of Medical Sciences, Grunwaldzka 10, 60-780 Poznan, Poland
| | - Michal P Marszall
- Department of Medicinal Chemistry, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Marta Ziegler-Borowska
- Department of Biomedical Chemistry and Polymer Science, Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
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Aragón-León A, Moreno-Vilet L, González-Ávila M, Mondragón-Cortez PM, Sassaki GL, Martínez-Pérez RB, Camacho-Ruíz RM. Inulin from halophilic archaeon Haloarcula: Production, chemical characterization, biological, and technological properties. Carbohydr Polym 2023; 321:121333. [PMID: 37739546 DOI: 10.1016/j.carbpol.2023.121333] [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: 03/21/2023] [Revised: 08/21/2023] [Accepted: 08/23/2023] [Indexed: 09/24/2023]
Abstract
Halophilic archaea are capable of producing fructans, which are fructose-based polysaccharides. However, their biochemical characterization and biological and technological properties have been scarcely studied. The aim of this study was to evaluate the production, chemical characterization, biological and technological properties of a fructan inulin-type biosynthesized by a halophilic archaeon. Fructan extraction was performed through ethanol precipitation and purification by diafiltration. The chemical structure was elucidated using Fourier Transform-Infrared Spectroscopy and Nuclear Magnetic Resonance (NMR). Haloarcula sp. M1 biosynthesizes inulin with an average molecular weight of 8.37 × 106 Da. The maximal production reached 3.9 g of inulin per liter of culture within seven days. The glass transition temperature of inulin was measured at 138.85 °C, and it exhibited an emulsifying index of 36.47 %, which is higher than that of inulin derived from chicory. Inulin from Haloarcula sp. M1 (InuH) demonstrates prebiotic capacity. This study represents the first report on the biological and technological properties of inulin derived from halophilic archaea.
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Affiliation(s)
- Alejandra Aragón-León
- Biotecnología Industrial, Tecnología Alimentaria y Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Camino Arenero 1227, Zapopan, Jalisco C.P. 45019, Mexico
| | - Lorena Moreno-Vilet
- Biotecnología Industrial, Tecnología Alimentaria y Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Camino Arenero 1227, Zapopan, Jalisco C.P. 45019, Mexico
| | - Marisela González-Ávila
- Biotecnología Industrial, Tecnología Alimentaria y Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Camino Arenero 1227, Zapopan, Jalisco C.P. 45019, Mexico
| | - Pedro Martín Mondragón-Cortez
- Biotecnología Industrial, Tecnología Alimentaria y Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Camino Arenero 1227, Zapopan, Jalisco C.P. 45019, Mexico
| | - Guilherme Lanzi Sassaki
- Departamento de Bioquímica e Biologia Molecular, Universidad de Federal do Paraná, CEP 81.531-980, CP 19046 Curitiba, PR, Brazil
| | | | - Rosa María Camacho-Ruíz
- Biotecnología Industrial, Tecnología Alimentaria y Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Camino Arenero 1227, Zapopan, Jalisco C.P. 45019, Mexico.
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Schilling C, Gansbiller M, Rühmann B, Sieber V, Schmid J. Rheological characterization of artificial paenan compositions produced by Paenibacillus polymyxa DSM 365. Carbohydr Polym 2023; 320:121243. [PMID: 37659800 DOI: 10.1016/j.carbpol.2023.121243] [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: 06/04/2023] [Revised: 07/16/2023] [Accepted: 07/28/2023] [Indexed: 09/04/2023]
Abstract
Microbial exopolysaccharides offer a sustainable alternative to petroleum-based rheological modifiers. Recent studies revealed that the heteroexopolysaccharide produced by Paenibacillus polymyxa is composed of three distinct biopolymers, referred to as paenan I, II and III. Using CRISPR-Cas9 mediated knock-out variants of glycosyltransferases, defined polysaccharide compositions were produced and rheologically characterized in detail. The high viscosity and gel-like character of the wildtype polymer is proposed to originate from the non-covalent interaction between a pyruvate residue of paenan I and the glucuronic acid found in the backbone of paenan III. Paenan II conveys thermostable properties to the exopolysaccharide mixture. In contrast to the wildtype polymer mixture, knock-out variants demonstrated significantly altered rheological behavior. Using the rheological characterization performed in this study, tailor-made paenan variants and mixtures can be generated to be utilized in a wide range of applications including thickening agents, coatings, or high-value biomedical materials.
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Affiliation(s)
- Christoph Schilling
- Chair of Chemistry of Biogenic Resources, Technical University of Munich, TUM Campus Straubing for Biotechnology and Sustainability, Schulgasse 16, 94315, Straubing, Germany
| | - Moritz Gansbiller
- Chair of Chemistry of Biogenic Resources, Technical University of Munich, TUM Campus Straubing for Biotechnology and Sustainability, Schulgasse 16, 94315, Straubing, Germany; Institute for Molecular Microbiology and Biotechnology, University of Münster, Corrensstrasse 3, 48149 Münster, Germany
| | - Broder Rühmann
- Chair of Chemistry of Biogenic Resources, Technical University of Munich, TUM Campus Straubing for Biotechnology and Sustainability, Schulgasse 16, 94315, Straubing, Germany
| | - Volker Sieber
- Chair of Chemistry of Biogenic Resources, Technical University of Munich, TUM Campus Straubing for Biotechnology and Sustainability, Schulgasse 16, 94315, Straubing, Germany; School of Chemistry and Molecular Biosciences, The University of Queensland, 68 Copper Road, St. Lucia 4072, Australia; TUM Catalysis Research Center, Ernst-Otto-Fischer-Straße1, 85748, Garching, Germany
| | - Jochen Schmid
- Chair of Chemistry of Biogenic Resources, Technical University of Munich, TUM Campus Straubing for Biotechnology and Sustainability, Schulgasse 16, 94315, Straubing, Germany; Institute for Molecular Microbiology and Biotechnology, University of Münster, Corrensstrasse 3, 48149 Münster, Germany.
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6
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Xu L, Wu D, Xu H, Zhao Z, Chen Q, Li H, Wei Z, Chen L. Characterization, production optimization, and fructanogenic traits of levan in a new Microbacterium isolate. Int J Biol Macromol 2023; 250:126330. [PMID: 37579898 DOI: 10.1016/j.ijbiomac.2023.126330] [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: 05/23/2023] [Revised: 08/07/2023] [Accepted: 08/11/2023] [Indexed: 08/16/2023]
Abstract
Levan is a high-valued β-(2,6)-linked fructan with promising physicochemical and physiological properties and has diverse potential applications in the food, nutraceutical, pharmaceutical and cosmetic industry, but its commercial availability is still restricted to the relatively high costs of production. In this study, a strain identified as Microbacterium sp. XL1 was isolated from soil and highly produced exopolysaccharide (EPS). HPLC, FTIR and NMR spectroscopy revealed XL1-EPS is a levan-type fructan connected by β-(2, 6) linkages. SEM, DLS and TGA-DSC analysis showed that XL1-EPS processed high morphological versatility, narrow size distribution in its solutions and excellent thermal stability. The levan yield reached 83.67 ± 4.06 g/L with corresponding productivity of 3.49 ± 0.17 g/L/h and a conversion yield of 39.8 ± 1.9 % using sucrose (210 g/L) as substrates under the optimal cultivation conditions concluded by the response surface methodology (RSM). More strikingly, the XL1 strain also has multi-type fructanases to generate levanbiose, kestose, DFA IV and other L-FOSs. These results suggest Microbacterium sp. XL1 is a promising strain to produce levan and can provide various levan/inulin-degrading enzymes to create a great diversity of FOSs.
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Affiliation(s)
- Linxiang Xu
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, 59 Cangwu Road, Lianyungang 222005, China; Jiangsu Institute of Marine Resources Development, 59 Cangwu Road, Haizhou, Lianyungang 222005, China; School of Food Science and Engineering, South China University of Technology, Guangzhou, China.
| | - Dan Wu
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China
| | - Haiyang Xu
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China
| | - Ziyan Zhao
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China
| | - Qianqian Chen
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China
| | - Hanqi Li
- School of Ocean Engineering, Jiangsu Ocean University, 59 Cangwu Road, Lianyungang 222005, China
| | - Zhen Wei
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, 59 Cangwu Road, Lianyungang 222005, China; Jiangsu Institute of Marine Resources Development, 59 Cangwu Road, Haizhou, Lianyungang 222005, China.
| | - Li Chen
- Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou, Lianyungang 222005, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, 59 Cangwu Road, Lianyungang 222005, China; Jiangsu Institute of Marine Resources Development, 59 Cangwu Road, Haizhou, Lianyungang 222005, China.
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Keerthashalini P, Sobanadevi V, Uppuluri KB. Deep eutectic solvent assisted recovery of high molecular weight levan from an isolated Neobacillus pocheonensis BPSCM4. Prep Biochem Biotechnol 2023; 54:407-418. [PMID: 37632396 DOI: 10.1080/10826068.2023.2245877] [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] [Indexed: 08/28/2023]
Abstract
The present study demonstrates the usage of deep eutectic solvent to recover microbial levan from the clarified fermented broth. The classic ethanol precipitation method for levan recovery is expensive because ethanol can be utilized as a biofuel. Production of ethanol consumes more energy and is not easily recycled. As a result, the current work concentrates on using environmentally friendly solvents for levan recovery. Deep Eutectic Solvents (DES) are greener and can replace ethanol from the microbial polysaccharides precipitation. Thus the proposed approach is environment friendly, technically feasible, reliable and economically viable. The levan was produced from a microbial isolate of aged sugarcane molasses, recovered using traditional ethanol and proposed DES (Choline Chloride and Ethylene Glycol) assisted precipitation. The levan-producing strain was characterized and identified as Neobacillus pocheonensis BPSCM4. The DES-precipitated levan has a high molecular weight of levan, 1.54 × 106 KDa, compared with the ethanol-precipitated levan, 4.246 KDa. The high molecular weight of DES-precipitated levan is due to the low viscosity and hydrogen interaction of ChCl:EG with the levan present in the fermented broth. Further, the optimization enhanced the levan yield to 32.56 g/L when the sucrose concentration was 250 g/L.
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Affiliation(s)
- P Keerthashalini
- Bioprospecting Laboratory, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
| | - V Sobanadevi
- Bioprospecting Laboratory, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
| | - Kiran Babu Uppuluri
- Bioprospecting Laboratory, School of Chemical and Biotechnology, SASTRA Deemed University, Thanjavur, Tamil Nadu, India
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de Lemos EA, Procópio L, da Mota FF, Jurelevicius D, Rosado AS, Seldin L. Molecular characterization of Paenibacillus antarcticus IPAC21, a bioemulsifier producer isolated from Antarctic soil. Front Microbiol 2023; 14:1142582. [PMID: 37025627 PMCID: PMC10072262 DOI: 10.3389/fmicb.2023.1142582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 02/28/2023] [Indexed: 04/08/2023] Open
Abstract
Paenibacillus antarcticus IPAC21, an endospore-forming and bioemulsifier-producing strain, was isolated from King George Island, Antarctica. As psychrotolerant/psychrophilic bacteria can be considered promising sources for novel products such as bioactive compounds and other industrially relevant substances/compounds, the IPAC21 genome was sequenced using Illumina Hi-seq, and a search for genes related to the production of bioemulsifiers and other metabolic pathways was performed. The IPAC21 strain has a genome of 5,505,124 bp and a G + C content of 40.5%. Genes related to the biosynthesis of exopolysaccharides, such as the gene that encodes the extracellular enzyme levansucrase responsible for the synthesis of levan, the 2,3-butanediol pathway, PTS sugar transporters, cold-shock proteins, and chaperones were found in its genome. IPAC21 cell-free supernatants obtained after cell growth in trypticase soy broth at different temperatures were evaluated for bioemulsifier production by the emulsification index (EI) using hexadecane, kerosene and diesel. EI values higher than 50% were obtained using the three oil derivatives when IPAC21 was grown at 28°C. The bioemulsifier produced by P. antarcticus IPAC21 was stable at different NaCl concentrations, low temperatures and pH values, suggesting its potential use in lower and moderate temperature processes in the petroleum industry.
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Affiliation(s)
- Ericka Arregue de Lemos
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luciano Procópio
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Diogo Jurelevicius
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alexandre Soares Rosado
- Biological and Environmental Sciences and Engineering (BESE), King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Lucy Seldin
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
- *Correspondence: Lucy Seldin,
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9
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Meng D, Wang H, Song B, Zhang H, Fu R, Wang S, Li J, Zhang J. Characterization and bioactivity analysis of a heteropolysaccharide purified from Paenibacillus edaphicus strain UJ1. Int J Biol Macromol 2022; 223:57-66. [PMID: 36347363 DOI: 10.1016/j.ijbiomac.2022.11.016] [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: 06/12/2022] [Revised: 10/23/2022] [Accepted: 11/02/2022] [Indexed: 11/06/2022]
Abstract
Many polysaccharides produced by Paenibacillus spp. have attractive properties, such as rheological modification and immunomodulation. However, properties of P. edaphicus polysaccharides are not understood sufficiently. Here, the polysaccharide (PUM) was obtained from P. edaphicus strain UJ1 by batch fermentation, and the chemical characteristics, rheological and anti-inflammatory properties of PUM and its sulfate derivative (PUM-S) were investigated. The results indicated that PUM was a typical shear-thinning biopolymer with an estimated weight average molecular weight of 2.45 × 107 Da. PUM molecule consisted of D-Man, D-GlcA, D-Glc, D-Gal, and L-Fuc with the molar ratio of 3.00:1.07:3.21:0.81:0.76. It had the backbone → 3)-β-D-Man-(1 → 3)-β-D-Glc-(1 → 3)-β-D-Man-(1 → 3)β-D-Glc-(1 → 4)-β-D-GlcA-(1 → 3)-β-D-Man-(1 → and two side chains, namely, pyruvoyl-Glc-(1→ and β-L-Fuc-(1 → 3)-β-D-Gal-(1→. Moreover, PUM-S was prepared by SO3-pyridine method and had the weight average molecular weight of 1.42 × 105 Da. The bioactivity of PUM and PUM-S was analyzed in vitro in RAW 264.7 cells. The results indicated that both PUM and PUM-S facilitated cell proliferation at 50-500 μg/mL. Besides, PUM-S showed potential anti-inflammatory effect in the LPS-induced cells. According to transcription and molecular dynamics analyses, PUM-S expressed its activity probably by interacting with the Toll-like receptor 4. In general, P. edaphicus produced a polysaccharide with new chemical structure and promising rheological and bioactive properties.
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Affiliation(s)
- Deyao Meng
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Hongyang Wang
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Baocai Song
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Huijuan Zhang
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Renjie Fu
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Shiming Wang
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
| | - Jing Li
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China; Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China.
| | - Jianfa Zhang
- Center for Molecular Metabolism, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China; Key Laboratory of Metabolic Engineering and Biosynthesis Technology, Ministry of Industry and Information Technology, Nanjing University of Science and Technology, 200 Xiaolingwei Street, Nanjing 210094, China
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10
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Sustainable Exopolysaccharide Production by Rhizobium viscosum CECT908 Using Corn Steep Liquor and Sugarcane Molasses as Sole Substrates. Polymers (Basel) 2022; 15:polym15010020. [PMID: 36616373 PMCID: PMC9823382 DOI: 10.3390/polym15010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
Microbial exopolysaccharides (EPS) are promising alternatives to synthetic polymers in a variety of applications. Their high production costs, however, limit their use despite their outstanding properties. The use of low-cost substrates such as agro-industrial wastes in their production, can help to boost their market competitiveness. In this work, an alternative low-cost culture medium (CSLM) was developed for EPS production by Rhizobium viscosum CECT908, containing sugarcane molasses (60 g/L) and corn steep liquor (10 mL/L) as sole ingredients. This medium allowed the production of 6.1 ± 0.2 g EPS/L, twice the amount produced in the standard medium (Syn), whose main ingredients were glucose and yeast extract. This is the first report of EPS production by R. viscosum using agro-industrial residues as sole substrates. EPSCSLM and EPSSyn exhibited a similar carbohydrate composition, mainly 4-linked galactose, glucose and mannuronic acid. Although both EPS showed a good fit to the Herschel-Bulkley model, EPSCSLM displayed a higher yield stress and flow consistency index when compared with EPSSyn, due to its higher apparent viscosity. EPSCSLM demonstrated its potential use in Microbial Enhanced Oil Recovery by enabling the recovery of nearly 50% of the trapped oil in sand-pack column experiments using a heavy crude oil.
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Charoenwongpaiboon T, Wangpaiboon K, Septham P, Jiamvoraphong N, Issaragrisil S, Pichyangkura R, Lorthongpanich C. Production and bioactivities of nanoparticulated and ultrasonic-degraded levan generated by Erwinia tasmaniensis levansucrase in human osteosarcoma cells. Int J Biol Macromol 2022; 221:1121-1129. [PMID: 36115448 DOI: 10.1016/j.ijbiomac.2022.09.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 09/09/2022] [Accepted: 09/10/2022] [Indexed: 11/05/2022]
Abstract
Levan is a bioactive polysaccharide that can be synthesized by various microorganisms. In this study, the physicochemical properties and bioactivity of levan synthesized by recombinant levansucrase from Erwinia tasmaniensis were investigated. The synthesis conditions, including the enzyme concentration, substrate concentration, and temperature, were optimized. The obtained levan generally appeared as a cloudy suspension. However, it could transform into a hydrogel at concentrations exceeding 10 % (w/v). Then, ultrasonication was utilized to reduce the molecular weight and increase the bioavailability of levan. Dynamic light scattering (DLS) and gel permeation chromatography (GPC) indicated that the size of levan was significantly decreased by ultrasonication, whereas Fourier transform infrared spectroscopy, 1H-nuclear magnetic resonance, and X-ray powder diffraction revealed that the chemical structure of levan was not changed. Finally, the bioactivities of both levan forms were examined using human osteosarcoma (Saos-2) cells. The result clearly illustrated that sonicated levan had higher antiproliferative activity in Saos-2 cells than original levan. Sonicated levan also activated Toll-like receptor expression at the mRNA level. These findings suggested the important beneficial applications of sonicated levan for the development of cancer therapies.
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Affiliation(s)
| | - Karan Wangpaiboon
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Prapasri Septham
- Siriraj Center of Excellence for Stem Cell Research, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Nittaya Jiamvoraphong
- Siriraj Center of Excellence for Stem Cell Research, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Surapol Issaragrisil
- Siriraj Center of Excellence for Stem Cell Research, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Rath Pichyangkura
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Chanchao Lorthongpanich
- Siriraj Center of Excellence for Stem Cell Research, Department of Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand.
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Bio_Fabricated Levan Polymer from Bacillus subtilis MZ292983.1 with Antibacterial, Antibiofilm, and Burn Healing Properties. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136413] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
The biopolymer levan has sparked a lot of interest in commercial production and various industrial applications. In this study, a bacterial isolate with promising levan-producing ability was isolated from a soil sample obtained from Princess Nourah bint Abdulrahman University in Saudi Arabia. The isolate has been identified and submitted to GenBank as Bacillus subtilis MZ292983.1. The bacterial levan polymer was extracted using ethyl alcohol (75%) and CaCl2 (1%) and then characterized using several approaches, such as Fourier transform infrared spectrometry and nuclear magnetic resonance. The IR spectrum of the levan polymer showed characteristic peaks confirming characteristics of polysaccharides, including a broad stretching peak of OH around 3417 cm−1 and aliphatic CH stretching was observed as two peaks at 2943, and 2885 cm−1. In addition, the FTIR spectrum featured an absorption at 2121 cm−1, indicating the fingerprint of the β-glycosidic bond. Based on 1H and 13C NMR spectroscopy analysis, six unexchanged proton signals related to fructose as a forming monomer of levan were observed. Evaluation of levan’s antibacterial effect against two pathogenic bacteria, S. aureus (ATCC 33592) and E. coli (ATCC 25922), showed inhibition zones of 1 cm and 0.8 cm in diameter, respectively, with MICs of more than 256 μg mL−1 for both strains. Moreover, the antibiofilm property of the levan polymer was assessed and the results showed that the inhibition rate was positively proportional to the levan concentration, as the inhibition percentages were 50%, 29.4%, 29.4%, 26.5%, and 14.7% at concentrations of 2, 1, 0.5, 0.25, and 0.125 mg mL−1, respectively. Levan showed a significant role in burn healing properties since it accelerated the process of healing burn-induced areas in rats when compared with those either treated with normal saline or treated with the cream base only.
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Mummaleti G, Sarma C, Kalakandan SK, Gazula H, Sivanandham V, Anandharaj A. Characterization of levan produced from coconut inflorescence sap using Bacillus subtilis and its application as a sweetener. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112697] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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