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Duan X, Subbiah V, Agar OT, Barrow CJ, Ashokkumar M, Dunshea FR, Suleria HAR. Optimizing extraction methods by a comprehensive experimental approach and characterizing polyphenol compositions of Ecklonia radiata. Food Chem 2024; 455:139926. [PMID: 38833868 DOI: 10.1016/j.foodchem.2024.139926] [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: 04/04/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/06/2024]
Abstract
Brown seaweed Ecklonia radiata harbors valuable polyphenols, notably phlorotannins, prized for their health benefits. This study optimized phlorotannin extraction via conventional solvent extraction and ultrasound-assisted extraction methods, utilizing variable concentrations of ethanol. Employing fractional factorial designs, key variables were identified. Steepest ascent/descent method and central composite rotatable designs refined optimal conditions, enhancing phlorotannin and polyphenol yields, and antioxidant capacities. Under optimized conditions, phlorotannin contents reached 2.366 ± 0.01 and 2.596 ± 0.04 PGE mg/g, total polyphenol contents peaked at 10.223 ± 0.03 and 10.836 ± 0.02 GAE mg/g. Robust antioxidant activity was observed: DPPH and OH radical scavenging capacities measured 27.891 ± 0.06 and 17.441 ± 0.08 TE mg/g, and 37.498 ± 1.12 and 49.391 ± 0.82 TE mg/g, respectively. Reducing power capacities surged to 9.016 ± 0.02 and 28.110 ± 0.10 TE mg/g. Liquid chromatography-mass spectrometry (LC-MS) and high-performance liquid chromatography (HPLC) analyses revealed enriched antioxidant compounds. Variations in polyphenol profiles were noted, potentially influencing antioxidant capacity nuances. This study illuminated the potential of E. radiata potential as a polyphenol source and offers optimized extraction methods poised to benefit various industries.
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Affiliation(s)
- Xinyu Duan
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Vigasini Subbiah
- Centre for Sustainable Bioproducts, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3217, Australia
| | - Osman Tuncay Agar
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Colin J Barrow
- Centre for Sustainable Bioproducts, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3217, Australia
| | | | - Frank R Dunshea
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, VIC 3010, Australia; Faculty of Biological Sciences, The University of Leeds, Leeds, UK
| | - Hafiz A R Suleria
- School of Agriculture, Food and Ecosystem Sciences, Faculty of Science, The University of Melbourne, Parkville, VIC 3010, Australia; Centre for Sustainable Bioproducts, School of Life and Environmental Sciences, Deakin University, Waurn Ponds, VIC 3217, Australia.
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Andrew M, Jayaraman G. Production optimization and antioxidant potential of exopolysaccharide produced by a moderately halophilic bacterium Virgibacillus dokdonensis VITP14. Prep Biochem Biotechnol 2024:1-19. [PMID: 38963714 DOI: 10.1080/10826068.2024.2370879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2024]
Abstract
This study aimed to enhance the extracellular polymeric substances (EPS) production of Virgibacillus dokdonensis VITP14 and explore its antioxidant potential. EPS and biomass production by VITP14 strain were studied under different culture parameters and media compositions using one factor at a time method. Among different nutrient sources, glucose and peptone were identified as suitable carbon and nitrogen sources. Furthermore, the maximum EPS production was observed at 5% of inoculum size, 5 g/L of NaCl, and 96 h of fermentation. Response surface methodology was employed to augment EPS production and investigate the optimal levels of nutrient sources with their interaction. The strain was observed to produce actual maximum EPS of about 26.4 g/L for finalized optimum medium containing glucose 20 g/L, peptone 10 g/L, and NaCl 50 g/L while the predicted maximum EPS was 26.5 g/L. There was a nine fold increase in EPS production after optimization study. Additionally, EPS has exhibited significant scavenging, reducing, and chelating potential (>85%) at their higher concentration. This study imparts valuable insights into optimizing moderately halophilic bacterial EPS production and evaluating its natural antioxidant properties. According to findings, V. dokdonensis VITP14 was a promising isolate that will provide significant benefits to biopolymer producing industries.
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Affiliation(s)
- Monic Andrew
- Department of Biotechnology, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Gurunathan Jayaraman
- Department of Biotechnology, School of Biosciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, India
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Ali AH, Bamigbade G, Tarique M, Esposito G, Obaid R, Abu-Jdayil B, Ayyash M. Physicochemical, rheological, and bioactive properties of exopolysaccharide produced by a potential probiotic Enterococcus faecalis 84B. Int J Biol Macromol 2023; 240:124425. [PMID: 37076064 DOI: 10.1016/j.ijbiomac.2023.124425] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/25/2023] [Accepted: 04/08/2023] [Indexed: 04/21/2023]
Abstract
Exopolysaccharides (EPS) have attracted a great interest due to their potential health-promoting properties and industrial applications. This study aimed to investigate the physicochemical, rheological, and biological properties of an EPS produced by a potential probiotic strain Enterococcus faecalis 84B. The results show that the extracted EPS, designated EPS-84B, had an average molecular weight of 604.8 kDa, particles size diameter of 322.0 nm, and mainly composed of arabinose and glucose with a molar ratio of 1:2. Furthermore, EPS-84B exhibited a shear-thinning behavior and had a high melting point. The rheological properties of EPS-84B were strongly influenced by the type of salt than by the pH value. EPS-84B displayed ideal viscoelastic properties, with both viscous and storage moduli increasing with frequency. The antioxidant activity of EPS-84B at a concentration of 5 mg/mL was 81.1 % against DPPH and 35.2 % against ABTS. At 5 mg/mL, the antitumor activity of EPS-84B against Caco-2 and MCF-7 cell lines was 74.6 and 38.6 %, respectively. In addition, the antidiabetic activity of EPS-84B towards α-amylase and α-glucosidase was 89.6 and 90.0 %, respectively at 100 μg/mL. The inhibition of foodborne pathogens by EPS-84B was up to 32.6 %. Overall, EPS-84B has promising properties that could be utilized in food and pharmaceutical industries.
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Affiliation(s)
- Abdelmoneim H Ali
- Department of Food Science, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Gafar Bamigbade
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, P.O. Box 15551, United Arab Emirates
| | - Mohammed Tarique
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, P.O. Box 15551, United Arab Emirates
| | - Gennaro Esposito
- Science Division - New York University Abu Dhabi, NYUAD Campus, Saadiyat Island, PO Box 129188, Abu Dhabi, United Arab Emirates; Istituto Nazionale Biostrutture e Biosistemi, Viale Medaglie d'Oro 305, 00136 Roma, Italy
| | - Reyad Obaid
- Department: Clinical Nutrition and Dietetics, University of Sharjah, Sharjah, United Arab Emirates
| | - Basim Abu-Jdayil
- Chemical and Petroleum Engineering Department, College of Engineering, United Arab Emirates University (UAEU), Al Ain, P.O. Box 15551, United Arab Emirates.
| | - Mutamed Ayyash
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University (UAEU), Al Ain, P.O. Box 15551, United Arab Emirates.
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Yang X, Dai Z, Yuan R, Guo Z, Xi H, He Z, Wei M. Effects of Salinity on Assembly Characteristics and Function of Microbial Communities in the Phyllosphere and Rhizosphere of Salt-Tolerant Avicennia marina Mangrove Species. Microbiol Spectr 2023; 11:e0300022. [PMID: 36744884 PMCID: PMC10101020 DOI: 10.1128/spectrum.03000-22] [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: 08/09/2022] [Accepted: 01/06/2023] [Indexed: 02/07/2023] Open
Abstract
It is of great significance to explore the structure and salinity response of microbial communities in salt-tolerant plants to understand the mechanisms of plant-microbe interactions. Herein, we investigated the phyllosphere and rhizosphere microbial communities of Avicennia marina, a pioneer salt-tolerant plant, at three sites with different salinities in the coastal intertidal zone. The results showed that salinity had different effects on phyllosphere and rhizosphere microbial communities and had a greater impact on bacterial communities and bacterial network interactions. The rhizosphere bacterial community alpha diversity significantly increased with increasing salinity. Moreover, the relative abundance of Proteobacteria decreased significantly, while that of Bacteroidota and Actinobacteriota, with stronger salt tolerance and nutrient utilization capacity, increased significantly. Functional prediction indicated that the microbial communities could produce catalase, peroxidase, 3-phytase, and tryptophan synthase, which may exert potential antistress and growth-promoting functions. Among them, catalase, 3-phytase, alkaline phosphatase, and acid phosphatase increased significantly in the phyllosphere and rhizosphere bacterial communities and the phyllosphere fungal community with increasing salinity. Importantly, the dominant taxa Kushneria and Bacillus, which are salt tolerant and growth promoting, were isolated from the phyllosphere and rhizosphere, respectively, and verified to have the ability to alleviate salt stress and promote the growth of rice. IMPORTANCE Avicennia marina is a pioneer salt-tolerant plant in coastal intertidal mangroves, an efficient blue carbon ecosystem. It is of great importance to explore how salinity affects the phyllosphere and rhizosphere microbial communities of A. marina. This study showed that the microbial communities in the phyllosphere and rhizosphere of A. marina had different constitutive properties, adaptive network interactions, and potential stress-promoting functions. Furthermore, the dominant bacteria Kushneria and Bacillus were obtained from the phyllosphere and rhizosphere, respectively, and their coculture with rice could effectively alleviate salt stress and promote rice growth. Additionally, the effects of salinity changes on microbial community structure, associations, and functional potential in the phyllosphere and rhizosphere of A. marina were observed. This study has enriched our understanding of the microbial community structure, function, and ecological stability of mangrove species in coastal intertidal zones and has practical significance for improving crop yield by using salt-tolerant plant microbiomes.
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Affiliation(s)
- Xiangxia Yang
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Zhian Dai
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Rongwei Yuan
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Zhenhua Guo
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Hanxiao Xi
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Zhili He
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, China
| | - Mi Wei
- School of Agriculture, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, China
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Chen Y, Liu T, Lai Q, Dong C, Shao Z. Zunongwangia pacifica sp. nov., isolated from surface seawater of the Western Pacific Ocean. Int J Syst Evol Microbiol 2022; 72. [PMID: 36748469 DOI: 10.1099/ijsem.0.005606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Zunongwangia is a group of marine bacteria with important industrial application potential and ecological functions. In this study, a Gram-stain-negative, rod-shaped, non-motile, strictly aerobic and bright yellow pigmented bacterial strain within this genus, designated C2-37M9T, was isolated from a surface seawater sample from the Philippine Basin in the Western Pacific Ocean. Strain C2-37M9T grew at 10-44 °C (optimum, 28-30 °C), pH 6-9 (pH 7) and in the presence of 0-12 % NaCl (w/v; 2-3 %). Phylogenetic analysis based on 16S rRNA gene sequences indicated that it belonged to the genus Zunongwangia and had 95.7-98.7 % sequence similarity to all type strains of this genus, with the highest value corresponding to Zunongwangia profunda (98.7 %). Digital DNA-DNA hybridization, average nucleotide identity and average amino acid identity values between strain C2-37M9T and all valid type strains were 27.5-32.3, 83.8-86.7 and 86.9-89.0 %, respectively. The principal fatty acids (>5 %) were iso-C15 : 0, iso-C17 : 0 3-OH, anteiso-C15 : 0, summed feature 9 (C16 : 0 10-methyl and/or iso-C17 : 1 ω9c), iso-C15 : 1 G and summed feature 3 (C16 : 1 ω6c and/or C16 : 1 ω7c). The predominant respiratory quinone was MK-6. The polar lipids were one phosphatidylethanolamine, two unknown glycolipids, three unidentified aminolipids and six unidentified lipids. The genomic DNA G+C content of strain C2-37M9T was 36.7 mol%. Based on phylogenetic results and genomic-based relatedness indices, as well as phenotypic and genotypic characteristics, strain C2-37M9T represents a novel species within the genus Zunongwangia, for which the name Zunongwangia pacifica sp. nov. is proposed. The type strain is C2-37M9T (=MCCC M21534T=KCTC 82852T).
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Affiliation(s)
- Yongqing Chen
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; State Key Laboratory Breeding Base of Marine Genetic Resources; Key Laboratory of Marine Genetic Resources of Fujian Province, Xiamen 361005, PR China.,College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, PR China
| | - Tianqi Liu
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; State Key Laboratory Breeding Base of Marine Genetic Resources; Key Laboratory of Marine Genetic Resources of Fujian Province, Xiamen 361005, PR China.,College of Biological Science and Engineering, Fuzhou University, Fuzhou 350108, PR China
| | - Qiliang Lai
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; State Key Laboratory Breeding Base of Marine Genetic Resources; Key Laboratory of Marine Genetic Resources of Fujian Province, Xiamen 361005, PR China
| | - Chunming Dong
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; State Key Laboratory Breeding Base of Marine Genetic Resources; Key Laboratory of Marine Genetic Resources of Fujian Province, Xiamen 361005, PR China
| | - Zongze Shao
- Key Laboratory of Marine Genetic Resources, Third Institute of Oceanography, Ministry of Natural Resources of China; State Key Laboratory Breeding Base of Marine Genetic Resources; Key Laboratory of Marine Genetic Resources of Fujian Province, Xiamen 361005, PR China
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Xie W, Zhang Z, Bai S, Wu YR. Extracellular expression of agarolytic enzymes in Clostridium sp. strain and its application for butanol production from Gelidium amansii. BIORESOURCE TECHNOLOGY 2022; 363:127962. [PMID: 36115509 DOI: 10.1016/j.biortech.2022.127962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 06/15/2023]
Abstract
In this study, Clostridium sp. strain WK-AN1 carrying both genes of agarase (Aga0283) and neoagarobiose hydrolase (NH2780) were successfully constructed to convert agar polysaccharide directly into butanol, contributing to overcome the lack of algal hydrolases in solventogenic clostridia. Through the optimization by the Plackett-Burman design (PBD) and response surface methodology (RSM), a maximal butanol production of 6.42 g/L was achieved from 17.86 g/L agar. Further application of utilizing the butyric acid pretreated Gelidium amansii hydrolysate demonstrated the modified strain obtained the butanol production of 7.83 g/L by 1.63-fold improvement over the wild-type one. This work for the first time establishes a novel route to utilize red algal polysaccharides for butanol fermentation by constructing a solventogenic clostridia-specific secretory expression system for heterologous agarases, which will provide insights for future development of the sustainable third-generation biomass energy.
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Affiliation(s)
- Wei Xie
- Department of Biology, Shantou University, Shantou, Guangdong 515063, China
| | - Zhiqian Zhang
- Tidetron Bioworks Technology (Guangzhou) Co., Ltd., Guangzhou Qianxiang Bioworks Co., Ltd., Guangzhou, Guangdong 510000, China
| | - Shengkai Bai
- Department of Biology, Shantou University, Shantou, Guangdong 515063, China
| | - Yi-Rui Wu
- Tidetron Bioworks Technology (Guangzhou) Co., Ltd., Guangzhou Qianxiang Bioworks Co., Ltd., Guangzhou, Guangdong 510000, China.
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Niknezhad SV, Kianpour S, Jafarzadeh S, Alishahi M, Najafpour Darzi G, Morowvat MH, Ghasemi Y, Shavandi A. Biosynthesis of exopolysaccharide from waste molasses using Pantoea sp. BCCS 001 GH: a kinetic and optimization study. Sci Rep 2022; 12:10128. [PMID: 35710936 PMCID: PMC9203581 DOI: 10.1038/s41598-022-14417-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 06/07/2022] [Indexed: 11/08/2022] Open
Abstract
The bacterium Pantoea sp. BCCS 001 GH produces an exopolysaccharide (EPS) named Pantoan through using sugar beet molasses (SBM) as an inexpensive and widely available carbon source. This study aims to investigate the kinetics and optimization of the Pantoan biosynthesis using Pantoea sp. BCCS 001 GH in submerged culture. During kinetics studies, the logistic model and Luedeking-Piret equation are precisely fit with the obtained experimental data. The response surface methodology (RSM)-central composite design (CCD) method is applied to evaluate the effects of four factors (SBM, peptone, Na2HPO4, and Triton X-100) on the concentration of Pantoan in batch culture of Pantoea sp. BCCS 001 GH. The experimental and predicted maximum Pantoan production yields are found 9.9 ± 0.5 and 10.30 g/L, respectively, and the best prediction factor concentrations are achieved at 31.5 g/L SBM, 2.73 g/L peptone, 3 g/L Na2HPO4, and 0.32 g/L Triton X-100 after 48 h of submerged culture fermentation, at 30 °C. The functional groups and major monosaccharides (glucose and galactose) of a purified Pantoan are described and confirmed by 1HNMR and FTIR. The produced Pantoan is also characterized by thermogravimetric analysis and the rheological properties of the biopolymer are investigated. The present work guides the design and optimization of the Pantoea sp. BCCS 001 GH culture media, to be fine-tuned and applied to invaluable EPS, which can be applicable in food and biotechnology applications.
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Affiliation(s)
- Seyyed Vahid Niknezhad
- Burn and Wound Healing Research Center, Shiraz University of Medical Sciences, Shiraz, 71987-54361, Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran
| | - Sedigheh Kianpour
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran
| | - Sina Jafarzadeh
- Department of Energy Conversion and Storage, Technical University of Denmark, Fysikvej, 2800 Kgs, Lyngby, Denmark
| | - Mohsen Alishahi
- Burn and Wound Healing Research Center, Shiraz University of Medical Sciences, Shiraz, 71987-54361, Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran
| | - Ghasem Najafpour Darzi
- Department of Chemical Engineering, Faculty of Engineering, Noshirvani University of Technology, Babol, Iran
| | - Mohammad Hossein Morowvat
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran.
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran.
| | - Younes Ghasemi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran.
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, P.O. Box 71468-64685, Shiraz, Iran.
| | - Amin Shavandi
- Université Libre de Bruxelles (ULB), École Polytechnique de Bruxelles-BioMatter Unit, Avenue F. D. Roosevelt, 50-CP 165/61, 1050, Brussels, Belgium
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Bouallegue A, Chaari F, Casillo A, Corsaro MM, Bachoual R, Ellouz-Chaabouni S. Levan produced by Bacillus subtilis AF17: Thermal, functional and rheological properties. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2022. [DOI: 10.1007/s11694-021-01172-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Effects of isolation conditions on structural and functional properties of the seed gum from Chinese quince (Chaenomeles sinensis). Carbohydr Polym 2021; 273:118538. [PMID: 34560950 DOI: 10.1016/j.carbpol.2021.118538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/29/2021] [Accepted: 07/31/2021] [Indexed: 02/03/2023]
Abstract
Chinese quince seed gum (CQSG) extracted under water-, alkali- and acid- conditions at 25, 50, and 80 °C, were evaluated in terms of yield, monosaccharide composition, molecular distribution, thermal gravimetry, emulsifying stability, rheological properties, and free radical scavenging ability. The results showed that the yield of CQSG increased to 3.9% after water extraction at 80 °C. Alkali and acid treatments promoted the conversion of neutral sugars to the uronic acid branch. Regardless of the extraction temperature, the xylose chain was the main component (35%-40%); however, a reduction was observed as the extraction temperature increased to 80 °C. All CQSG solutions extracted under these isolation conditions exhibited non-Newtonian rheological behavior. Compared to water-extracted samples, the alkali-extracted samples showed the worst thermal stability, while the acid-treated samples showed the worst emulsifying stability. This study provides theoretical support for the potential application of CQSG polysaccharides in the food and pharmaceutical industries.
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Samadlouie HR, Jahanbin K, jalali P. Production, medium optimization, and structural characterization of an extracellular polysaccharide produced by Rhodotorula minuta ATCC 10658. Food Sci Nutr 2020; 8:4957-4964. [PMID: 32994957 PMCID: PMC7500799 DOI: 10.1002/fsn3.1792] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/11/2022] Open
Abstract
Several strains of microorganism are capable of converting carbohydrates into extracellular polysaccharide. The preset research is a first effort made to optimize extracellular polysaccharide (CRMEP) by Rhodotorula minuta ATCC 10658 using one factor at time and response surface methods. One factor at time was applied in the initial screening of substrates prior to optimization study. Of all the substrates examined, starch as carbon source and defatted soy bean powder as protein source were discovered to be best for CRMEP production. Response surface analysis revealed that 15 g/L starch and 30g/L defatted soy bean powder were the optimal chemical conditions. The model predicted 13.22 g/L for CRMEP, which went along with the experimentally observed result. Purification of CRMEP by anion-exchange column of DEAE-cellulose yielded RMEP. Structural investigation indicated that the main chain of RMEP was composed of (1 → 3) and (1 → 4)-linked mannopyranosyl residues, with branches attached to O-6 of some (1 → 3)-linked mannopyranosyl residues. The branches were composed of Glcp-(1 → residues.
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Affiliation(s)
- Hamid Reza Samadlouie
- Department of Food Science and TechnologyFaculty of AgricultureShahrood University of TechnologyShahroodIran
| | - Kambiz Jahanbin
- Department of Food Science and TechnologyFaculty of AgricultureShahrood University of TechnologyShahroodIran
| | - Parisa jalali
- Department of Food Science and TechnologyFaculty of AgricultureShahrood University of TechnologyShahroodIran
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Andryukov BG, Besednova NN, Kuznetsova TA, Zaporozhets TS, Ermakova SP, Zvyagintseva TN, Chingizova EA, Gazha AK, Smolina TP. Sulfated Polysaccharides from Marine Algae as a Basis of Modern Biotechnologies for Creating Wound Dressings: Current Achievements and Future Prospects. Biomedicines 2020; 8:E301. [PMID: 32842682 PMCID: PMC7554790 DOI: 10.3390/biomedicines8090301] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 08/18/2020] [Accepted: 08/21/2020] [Indexed: 12/22/2022] Open
Abstract
Wound healing involves a complex cascade of cellular, molecular, and biochemical responses and signaling processes. It consists of successive interrelated phases, the duration of which depends on a multitude of factors. Wound treatment is a major healthcare issue that can be resolved by the development of effective and affordable wound dressings based on natural materials and biologically active substances. The proper use of modern wound dressings can significantly accelerate wound healing with minimum scar mark. Sulfated polysaccharides from seaweeds, with their unique structures and biological properties, as well as with a high potential to be used in various wound treatment methods, now undoubtedly play a major role in innovative biotechnologies of modern natural interactive dressings. These natural biopolymers are a novel and promising biologically active source for designing wound dressings based on alginates, fucoidans, carrageenans, and ulvans, which serve as active and effective therapeutic tools. The goal of this review is to summarize available information about the modern wound dressing technologies based on seaweed-derived polysaccharides, including those successfully implemented in commercial products, with a focus on promising and innovative designs. Future perspectives for the use of marine-derived biopolymers necessitate summarizing and analyzing results of numerous experiments and clinical trial data, developing a scientifically substantiated approach to wound treatment, and suggesting relevant practical recommendations.
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Affiliation(s)
- Boris G. Andryukov
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
- School of Biomedicine, Far Eastern Federal University (FEFU), 690091 Vladivostok, Russian
| | - Natalya N. Besednova
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
| | - Tatyana A. Kuznetsova
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
| | - Tatyana S. Zaporozhets
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
| | - Svetlana P. Ermakova
- Elyakov Pacific Institute of Bioorganic Chemistry (PIBOC) FEB RAS, 690022 Vladivostok, Russian; (S.P.E.); (T.N.Z.); (E.A.C.)
| | - Tatyana N. Zvyagintseva
- Elyakov Pacific Institute of Bioorganic Chemistry (PIBOC) FEB RAS, 690022 Vladivostok, Russian; (S.P.E.); (T.N.Z.); (E.A.C.)
| | - Ekaterina A. Chingizova
- Elyakov Pacific Institute of Bioorganic Chemistry (PIBOC) FEB RAS, 690022 Vladivostok, Russian; (S.P.E.); (T.N.Z.); (E.A.C.)
| | - Anna K. Gazha
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
| | - Tatyana P. Smolina
- Somov Research Institute of Epidemiology and Microbiology, 690087 Vladivostok, Russian; (N.N.B.); (T.A.K.); (T.S.Z.); (A.K.G.); (T.P.S.)
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12
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Tiwari ON, Sasmal S, Kataria AK, Devi I. Application of microbial extracellular carbohydrate polymeric substances in food and allied industries. 3 Biotech 2020; 10:221. [PMID: 32355595 PMCID: PMC7188750 DOI: 10.1007/s13205-020-02200-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 04/08/2020] [Indexed: 02/08/2023] Open
Abstract
Extracellular polymeric substances (EPS) are biopolymers, composed of polysaccharides, nucleic acids, proteins and lipids, which possess unique functional properties. Despite significant strides made in chemical production processes for polymers, the niche occupied by exopolysaccharides produced by bacteria, yeast or algae is steadily growing in its importance. With the availability of modern tools, a lot of information has been generated on the physico-chemical and biological properties using spectrometric tools, while advanced microscopic techniques have provided valuable insights into the structural-functional aspects. The size of EPS generally ranges between 10 and 10,000 kDa. The wide spectra of applications of EPS as adhesives, stabilizer, gelling, suspending, thickening agent, and surfactants in food and pharmaceutical industries are observed. The health benefits of these EPS enable the improvement of dual function, added value, and green products. This review summarizes previous work on the structural composition, rheological and thermal behaviour, and biosynthetic pathways of EPS and bioprocesses developed for their production. This review also considers each of the above factors and presents the current knowledge on the importance and refinement of available downstream protocols and genetic engineering towards specific food applications, which can help to diversify their prospects in different food and allied industries.
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Affiliation(s)
- Onkar Nath Tiwari
- Centre for Conservation and Utilization of Blue Green Algae, Division of Microbiology, Indian Agricultural Research Institute, New Delhi, 110012 India
| | - Soumya Sasmal
- Department of Biological Sciences and Engineering, Netaji Subhas University of Technology, New Delhi, 110078 India
| | - Ajay Kumar Kataria
- Department of Biological Sciences and Engineering, Netaji Subhas University of Technology, New Delhi, 110078 India
| | - Indrama Devi
- DBT-Institute of Bioresources and Sustainable Development, Imphal, Manipur 795001 India
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13
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Sun ML, Zhao F, Chen XL, Zhang XY, Zhang YZ, Song XY, Sun CY, Yang J. Promotion of Wound Healing and Prevention of Frostbite Injury in Rat Skin by Exopolysaccharide from the Arctic Marine Bacterium Polaribacter sp. SM1127. Mar Drugs 2020; 18:md18010048. [PMID: 31940773 PMCID: PMC7024241 DOI: 10.3390/md18010048] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/06/2020] [Accepted: 01/10/2020] [Indexed: 12/14/2022] Open
Abstract
Many marine microorganisms synthesize exopolysaccharides (EPSs), and some of these EPSs have been reported to have potential in different fields. However, the pharmaceutical potentials of marine EPSs are rarely reported. The EPS secreted by the Artic marine bacterium Polaribacter sp. SM1127 has good antioxidant activity, outstanding moisture-retention ability, and considerable protective property on human dermal fibroblasts (HDFs) at low temperature. Here, the effects of SM1127 EPS on skin wound healing and frostbite injury prevention were studied. Scratch wound assay showed that SM1127 EPS could stimulate the migration of HDFs. In the full-thickness cutaneous wound experiment of Sprague-Dawley (SD) rats, SM1127 EPS increased the wound healing rate and stimulated tissue repair detected by macroscopic observation and histologic examination, showing the ability of SM1127 EPS to promote skin wound healing. In the skin frostbite experiment of SD rats, pretreatment of rat skin with SM1127 EPS increased the rate of frostbite wound healing and promoted the repair of the injured skin significantly, indicating the good effect of SM1127 EPS on frostbite injury prevention. These results suggest the promising potential of SM1127 EPS in the pharmaceutical area to promote skin wound healing and prevent frostbite injury.
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Affiliation(s)
- Mei-Ling Sun
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
| | - Fang Zhao
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Xi-Ying Zhang
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- College of Marine Life Sciences, Institute for Advanced Ocean Study, Ocean University of China, Qingdao 266003, China
| | - Xiao-Yan Song
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
| | - Cai-Yun Sun
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
| | - Jie Yang
- State Key Laboratory of Microbial Technology, Institute of Marine Science and Technology, Marine Biotechnology Research Center, Shandong University, Qingdao 266237, China; (M.-L.S.); (F.Z.); (X.-L.C.); (X.-Y.Z.); (Y.-Z.Z.); (X.-Y.S.); (C.-Y.S.)
- Correspondence:
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14
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Hammi KM, Hammami M, Rihouey C, Le Cerf D, Ksouri R, Majdoub H. Ultrasonication of Polysaccharides from Tunisian Zizyphus lotus Fruit: Emulsifying Capacities, Rheological Properties and Antioxidant activities. CHEMISTRY AFRICA 2020. [DOI: 10.1007/s42250-020-00117-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Yang J, Zhang Y, Zhao S, Zhou Q, Xin X, Chen L. Statistical Optimization of Medium for Pullulan Production by Aureobasidium pullulans NCPS2016 Using Fructose and Soybean Meal Hydrolysates. Molecules 2018; 23:E1334. [PMID: 29865206 PMCID: PMC6100430 DOI: 10.3390/molecules23061334] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/22/2018] [Accepted: 05/30/2018] [Indexed: 11/21/2022] Open
Abstract
Pullulan, with its excellent characteristics of film-forming, water solubility, and biodegradability, is attracting more and more attention in agricultural products preservation. However, high pullulan production cost largely restricts its widely application due to its low production. In order to improve pullulan production by Aureobasidium pullulans NCPS2016, the medium was optimized using single factor experiment and response surface methodology. Based on the single factor experiments, the contents of soybean meal hydrolysates (SMHs), (NH₄)₂SO₄, and K₂HPO₄·3H₂O were considered to be main factors influencing the extracellular polysaccharide (EPS) production, and were further optimized by Box⁻Behnken design. The optimal content of SMHs of 7.71 g/L, (NH₄)₂SO₄ of 0.35 g/L, and K₂HPO₄·3H₂O of 8.83 g/L were defined. Finally, EPS production of 59.8 g/L was obtained, 39% higher in comparison with the production in the basal medium. The purified EPS produced by NCPS2016 was confirmed to be pullulan. This is the first time fructose is reported to be the optimal carbon source for pullulan production by Aureobasidium pullulans, which is of great significance for the further study of the mechanism of the synthesis of pullulan by NCPS2016. Also, the results here have laid a foundation for reducing the industrial production cost of pullulan.
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Affiliation(s)
- Jinyu Yang
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
| | - Yanhao Zhang
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
| | - Shuangzhi Zhao
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
| | - Qingxin Zhou
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
- College of Life Science, Shandong Normal University, Jinan 250014, China.
| | - Xue Xin
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
| | - Leilei Chen
- Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Key Laboratory of Agro-Products Processing Technology of Shandong Province, Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture, 202 Gongye North Road, Jinan 250100, China.
- College of Life Science, Shandong Normal University, Jinan 250014, China.
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16
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A new formulation of Bacillus thuringiensis: UV protection and sustained release mosquito larvae studies. Sci Rep 2016; 6:39425. [PMID: 28004743 PMCID: PMC5177894 DOI: 10.1038/srep39425] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 11/21/2016] [Indexed: 11/08/2022] Open
Abstract
Persistence of Bacillus thuringiensis is an important factor in determining the success of this product as a pest control agent. In this report we present the development of a highly active mosquitocidal formulation with high resistance to UV. LLP29-M19 strain of Bt, selected by repeated exposure to UV was found to be highly resistant to UV. The product was optimized and the methods used were statistically analyzed. Using single-factor experiments it was determined that the optimal concentration of sodium alginate, CaCl2 and hollow glass beads in the formulation were 1.0%, 2.0% and 3.5%, respectively. Plackett-Burman design was used to screen the interaction of the three factors, CaCl2, sodium alginate and hollow glass beads in the sustained-release formulation. The best combined concentration and mutual effects of the three factors were optimized by response surface methodology. The results showed that the most favorable composition was sodium alginate 0.78%, CaCl2 4.52%, hollow glass bead 3.12%, bacterial powder 3.0%, melanin 0.015%, sodium benzoate 0.2%, and mouse feed 0.5%, resulting in the immobilization time of 4.5 h, at which time the corrected sustained-release virulence rose 2391.67 fold, which was 6.07-fold higher than the basic formulation and deviated only 5.0% from the value predicted by RSM.
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17
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Thermal, emulsifying and rheological properties of polysaccharides sequentially extracted from Vaccinium bracteatum Thunb leaves. Int J Biol Macromol 2016; 93:1240-1252. [DOI: 10.1016/j.ijbiomac.2016.09.098] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/18/2016] [Accepted: 09/28/2016] [Indexed: 11/23/2022]
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18
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Banerjee A, Bandopadhyay R. Chapter 1 Bacterial Exopolysaccharides. Microb Biotechnol 2016. [DOI: 10.1201/9781315367880-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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19
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Li H, Jiao X, Sun Y, Sun S, Feng Z, Zhou W, Zhu H. The preparation and characterization of a novel sphingan WL from marine Sphingomonas sp. WG. Sci Rep 2016; 6:37899. [PMID: 27883073 PMCID: PMC5121650 DOI: 10.1038/srep37899] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 11/01/2016] [Indexed: 11/12/2022] Open
Abstract
Sphingans, a group of structurally closely related bacterial exopolysaccharides produced by members of the genus Sphingomonas, can be applied in a variety of industries such as food, cement, and personal care applications due to their high viscosity. A high sphingan-producing-bacterium, Sphingomonas sp. WG can secret large quantity of sphingan designated as WL. To enhance the production of WL, a three-stage control strategy was applied and the highest WL production can reach 33.3 g/L. The rheological analysis showed that the aqueous solution of WL had high viscosity, typical shearing-thinning behavior and great stability to high temperature, a wide range of pH (1 to 14), and high salinity. WL was composed principally of carbohydrate with 6.52% O-acyl groups. The carbohydrate portion of WL contained about 13% glucuronic acid and some neutral sugars including mannose, glucose and rhamnose in the molar ratio of 1:2.28:2.12. Partial acid hydrolysis of WL produced a new oligosaccharide WL-1. Structural resolution revealed that WL-1 consisted of α-L-Rha-(1→4)-β-L-Rha-(1→4)-β-D-Glc-(1→3)-α-D-Glc with β-D-Man substituent at the third glucose residue and carboxyl and O-acyl groups. These findings will broaden the applications of this novel sphingan in food, ink, oil and other industries.
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Affiliation(s)
- Hui Li
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Xue Jiao
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Yajie Sun
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Shiwei Sun
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Zhimei Feng
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Wanlong Zhou
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
| | - Hu Zhu
- Centre for Bioengineering and Biotechnology, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266580, People’s Republic of China
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20
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Exopolysaccharide production by a marine Pseudoalteromonas sp. strain isolated from Madeira Archipelago ocean sediments. N Biotechnol 2016; 33:460-6. [DOI: 10.1016/j.nbt.2016.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/21/2016] [Accepted: 02/16/2016] [Indexed: 11/16/2022]
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21
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Chuprom J, Bovornreungroj P, Ahmad M, Kantachote D, Dueramae S. Approach toward enhancement of halophilic protease production by Halobacterium sp. strain LBU50301 using statistical design response surface methodology. ACTA ACUST UNITED AC 2016; 10:17-28. [PMID: 28352520 PMCID: PMC5040864 DOI: 10.1016/j.btre.2016.02.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 02/15/2016] [Accepted: 02/17/2016] [Indexed: 01/15/2023]
Abstract
Halophilic protease producing Halobacterium sp. strain LBU50301 was isolated. RSM optimized the fermentation conditions to enhance halophilic protease yield. Optimized conditions used in bioreactor resulted about 13-fold enhancement.
A new potent halophilic protease producer, Halobacterium sp. strain LBU50301 was isolated from salt-fermented fish samples (budu) and identified by phenotypic analysis, and 16S rDNA gene sequencing. Thereafter, sequential statistical strategy was used to optimize halophilic protease production from Halobacterium sp. strain LBU50301 by shake-flask fermentation. The classical one-factor-at-a-time (OFAT) approach determined gelatin was the best nitrogen source. Based on Plackett–Burman (PB) experimental design; gelatin, MgSO4·7H2O, NaCl and pH significantly influenced the halophilic protease production. Central composite design (CCD) determined the optimum level of medium components. Subsequently, an 8.78-fold increase in corresponding halophilic protease yield (156.22 U/mL) was obtained, compared with that produced in the original medium (17.80 U/mL). Validation experiments proved the adequacy and accuracy of model, and the results showed the predicted value agreed well with the experimental values. An overall 13-fold increase in halophilic protease yield was achieved using a 3 L laboratory fermenter and optimized medium (231.33 U/mL).
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Affiliation(s)
- Julalak Chuprom
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Preeyanuch Bovornreungroj
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Mehraj Ahmad
- Institute of Nutrition (INMU), Mahidol University, 999 Phutthamonthon 4 Rd., Salaya, Nakhon Pathom 73170, Thailand
| | - Duangporn Kantachote
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Sawitree Dueramae
- Department of Microbiology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
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22
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Maalej H, Hmidet N, Boisset C, Bayma E, Heyraud A, Nasri M. Rheological and emulsifying properties of a gel-like exopolysaccharide produced by Pseudomonas stutzeri AS22. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.07.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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23
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Sun ML, Zhao F, Shi M, Zhang XY, Zhou BC, Zhang YZ, Chen XL. Characterization and Biotechnological Potential Analysis of a New Exopolysaccharide from the Arctic Marine Bacterium Polaribacter sp. SM1127. Sci Rep 2015; 5:18435. [PMID: 26688201 PMCID: PMC4685270 DOI: 10.1038/srep18435] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 11/18/2015] [Indexed: 11/21/2022] Open
Abstract
Although many kinds of exopolysaccharides (EPSs) from microorganisms have been used in industry, the exploration and utilization of EPSs from polar microorganisms is still rather rare. In this study, a flavobacterial strain, SM1127, from the Arctic brown alga Laminaria, was screened for its high EPS production (2.11 g/l) and was identified as belonging to the genus Polaribacter. The EPS secreted by strain SM1127 has a molecular mass of 220 kDa, and it mainly comprises N-acetyl glucosamine, mannose and glucuronic acid residues bound by heterogeneous linkages. Rheological studies on the aqueous EPS showed that it had a high viscosity and good shear-thinning property. Moreover, the EPS showed a high tolerance to high salinity and a wide pH range. The EPS also had good antioxidant activity. Particularly, its moisture-retention ability was superior to that of any other reported EPS or functional ingredient generally used in cosmetics. The EPS also showed a protective effect on human dermal fibroblasts at low temperature (4 °C). Safety assessment indicated that the EPS is safe for oral administration and external use. These results indicate the promising potential of the EPS from strain SM1127 in the food, cosmetic, pharmaceutical and biomedical fields.
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Affiliation(s)
- Mei-Ling Sun
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Fang Zhao
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Mei Shi
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Xi-Ying Zhang
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Bai-Cheng Zhou
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Jinan 250100, China
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China
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24
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Study on dyeing wastewater treatment at high temperature by MBBR and the thermotolerant mechanism based on its microbial analysis. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.08.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Abriouel H, Casado Muñoz MDC, Lavilla Lerma L, Pérez Montoro B, Bockelmann W, Pichner R, Kabisch J, Cho GS, Franz CMAP, Gálvez A, Benomar N. New insights in antibiotic resistance of Lactobacillus species from fermented foods. Food Res Int 2015; 78:465-481. [PMID: 28433315 DOI: 10.1016/j.foodres.2015.09.016] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/11/2015] [Accepted: 09/15/2015] [Indexed: 11/17/2022]
Affiliation(s)
- Hikmate Abriouel
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain.
| | - María Del Carmen Casado Muñoz
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Leyre Lavilla Lerma
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Beatriz Pérez Montoro
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Wilhelm Bockelmann
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Microbiology and Biotechnology, Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany
| | - Rohtraud Pichner
- Hochschule Fulda, University of Applied Sciences, Department of Nutritional, Food and Consumer Sciences, Leipziger Straße 123, 36037 Fulda, Germany
| | - Jan Kabisch
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Microbiology and Biotechnology, Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany
| | - Gyu-Sung Cho
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Microbiology and Biotechnology, Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany
| | - Charles M A P Franz
- Max Rubner-Institut, Federal Research Institute of Nutrition and Food, Department of Microbiology and Biotechnology, Haid-und-Neu-Str. 9, D-76131 Karlsruhe, Germany
| | - Antonio Gálvez
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Nabil Benomar
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
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Comparative transcriptome analysis reveals that lactose acts as an inducer and provides proper carbon sources for enhancing exopolysaccharide yield in the deep-sea bacterium Zunongwangia profunda SM-A87. PLoS One 2015; 10:e0115998. [PMID: 25679965 PMCID: PMC4332637 DOI: 10.1371/journal.pone.0115998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 12/03/2014] [Indexed: 11/23/2022] Open
Abstract
Many marine bacteria secrete exopolysaccharides (EPSs) that have important ecological and physiological functions. Numerous nutritional and environmental factors influence bacterial EPS production. However, the regulatory mechanisms of EPS production are poorly understood. The deep-sea Bacteroidetes bacterium Zunongwangia profunda SM-A87 can produce high quantities of EPS, and its EPS production is enhanced significantly by lactose. Here, we studied the reasons behind the significant advantage that lactose has over other carbon sources in EPS production in SM-A87. RNA-seq technologies were used to study lactose-regulated genes in SM-A87. The expression level of genes within the EPS gene cluster was up-regulated when lactose was added. Supplement of lactose also influenced the expression of genes located outside the EPS gene cluster that are also involved in EPS biosynthesis. The major glycosyl components of SM-A87 EPS are mannose, glucose and galactose. Genomic metabolic pathway analyses showed that the EPS precursor GDP-mannose can be synthesized from glucose, while the precursor UDP-glucose must be synthesized from galactose. Lactose can provide glucose and galactose simultaneously and prevent glucose inhibition. Lactose can also greatly stimulate the growth of SM-A87. Taken together, lactose acts not only as an inducer but also as a carbohydrate source for EPS production. This research broadens our knowledge of the regulation of EPS production in marine bacteria.
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Wang Y, Zhang L, Zhang W, Wu H, Zhu XM, Xu YJ, Yan JQ, Yu JY. Increasing plasmid-based DNA vaccine construct (16 kb pSVK-HBVA) production in Escherichia coli XL10-Gold through optimization of media component. BIOTECHNOL BIOTEC EQ 2015; 29:164-174. [PMID: 26740792 PMCID: PMC4697194 DOI: 10.1080/13102818.2014.989103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 08/15/2014] [Indexed: 01/16/2023] Open
Abstract
At present, there are production processes to produce protein by Escherichia coli (E. coli) fermentation. Research on the design and optimization of the plasmid fermentation medium, however, is less advanced. The fermentation medium that is optimized for plasmid DNA production is different from the medium that is optimized for protein production. So, establishing a scientific and rational method to optimize the fermentation medium used for plasmid production is very important. Previously, our laboratory developed a novel therapeutic DNA vaccine (named pSVK-HBVA) for hepatitis B based on the alphavirus replicon, and found that E. coli XL10-Gold was the optimal host strain for the production of plasmid pSVK-HBVA. The aim of this study was to establish a scientific and rational method to optimize the fermentation medium used for plasmid production, and investigate the effect of growth medium composition on the production of plasmid pSVK-HBVA harboured in E. coli XL10-Gold, as well as to optimize the medium composition. The one-factor-at-a-time experiments demonstrated that Luria-Bertani (LB) was the optimal basic medium. The optimal carbon source and nitrogen source were glycerol and home-made proteose peptone, respectively. Based on the Plackett–Burman (PB) design, proteose peptone, glycerol and NH4Cl were identified as the significant variables, which were further optimized by the steepest ascent (descent) method and central composite design. Growth medium optimization in 500-mL shake flasks by response surface methodology resulted in a maximum volumetric yield of 13.61 mg/L, which was approximately 2.5 times higher than that obtained from the basic medium (LB).
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Affiliation(s)
- Yu Wang
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Liang Zhang
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Wei Zhang
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Hao Wu
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Xiao Ming Zhu
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Yuan Ji Xu
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Jin Qi Yan
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
| | - Ji Yun Yu
- Institute of Basic Medical Science, Academy of Military Medical Sciences , 27 Tai Ping Road, Beijing 100850 , China
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Biosynthesis of Extracellular Polymeric Substances by the Marine BacteriumSaccharophagus degradansunder Different Nutritional Conditions. INT J POLYM SCI 2015. [DOI: 10.1155/2015/526819] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The effect of carbon source, carbon to nitrogen (C/N) ratio, and limitation in nutrients (N, P, K, Ca, Mg, and Fe) on extracellular polymeric substances (EPS) synthesis by the marine bacteriumSaccharophagus degradanswas studied. This strain was able to grow in mineral medium and produce EPS with different efficiency according to the C source used (g EPS/L): glucose or starch (1.5 ± 0.2); galactose, sucrose, or xylose (0.7 ± 0.2); and fructose (0.3 ± 0.1). The C/N ratio (glucose/ammonium) had a significant effect on EPS biosynthesis due to its production rise as the C/N ratio increased from 3 to 100 (0.7 to 2.1 g EPS/L). It was also observed that limitation in nutrients such as N, P, K, Ca, Mg, and Fe also favored EPS biosynthesis. When taking into account both factors (C/N ratio, 100; nutrients limitation, 50%) a positive synergistic effect was noted on EPS production since under these conditions the maximum concentration obtained was 4.12 ± 0.3 g/L after 72 h of culture. The polymer was found to be a polysaccharide of mainly glucose, mannose, and galactose. This is the first report on EPS production byS. degradanswhich is a new feature of this versatile marine bacterium.
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Liao L, Cheng Y, Liu S, Zhou J, An S, Lv M, Chen Y, Gu Y, Chen S, Zhang LH. Production of novel antibiotics zeamines through optimizing Dickeya zeae fermentation conditions. PLoS One 2014; 9:e116047. [PMID: 25541733 PMCID: PMC4277462 DOI: 10.1371/journal.pone.0116047] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/30/2014] [Indexed: 01/20/2023] Open
Abstract
Dickeya zeae strain EC1 was recently shown to produce a new type of phytotoxins designated as zeamine and zeamine II, which are potent wide-spectrum antibiotics against Gram-positive and Gram-negative bacterial pathogens, suggesting their promising potential as clinical medicines. In this study, the optimized medium composition and culture conditions for biosynthesis of novel antibiotics zeamines have been established by using response surface methodology, largely increasing the yield of zeamines from original about 7.35 µg · mL(-1) in minimal medium to about 150 µg · mL(-1) in LS5 medium. The study identified the major factors contributing to zeamines production, which include nitrate, sucrose, asparaginate, mineral elements Mg2+ and K+, and optimized amount of phosphate. In addition, the results showed that overexpression of zmsK in D. zeae strain EC1 could further increase zeamines yield to about 180 µg · mL(-1) in LS5 medium. The findings from this study could facilitate further characterization and utilization of these two novel antibiotics, and also provide useful clues for understanding the regulatory mechanisms that govern D. zeae virulence.
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Affiliation(s)
- Lisheng Liao
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Yingying Cheng
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Shiyin Liu
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Jianuan Zhou
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Shuwen An
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Republic of Singapore
| | - Mingfa Lv
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Yufan Chen
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Yanfang Gu
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
| | - Shaohua Chen
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
- * E-mail: (SC); (LHZ)
| | - Lian-Hui Zhang
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, Peoples' Republic of China
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Republic of Singapore
- Department of Biological Sciences, National University of Singapore, Singapore, Republic of Singapore
- * E-mail: (SC); (LHZ)
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Jeganathan A, Ramamoorthy S, Thillaichidambaram M. Optimization of extracellular polysaccharide production in Halobacillus trueperi AJSK using response surface methodology. ACTA ACUST UNITED AC 2014. [DOI: 10.5897/ajb2014.14109] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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31
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Impact of glycerol and nitrogen concentration on Enterobacter A47 growth and exopolysaccharide production. Int J Biol Macromol 2014; 71:81-6. [DOI: 10.1016/j.ijbiomac.2014.04.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/17/2014] [Accepted: 04/05/2014] [Indexed: 11/19/2022]
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Sun ML, Liu SB, Qiao LP, Chen XL, Pang X, Shi M, Zhang XY, Qin QL, Zhou BC, Zhang YZ, Xie BB. A novel exopolysaccharide from deep-sea bacterium Zunongwangia profunda SM-A87: low-cost fermentation, moisture retention, and antioxidant activities. Appl Microbiol Biotechnol 2014; 98:7437-45. [PMID: 24872221 DOI: 10.1007/s00253-014-5839-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/09/2014] [Accepted: 05/15/2014] [Indexed: 11/28/2022]
Abstract
Many marine microorganisms can secrete exopolysaccharides (EPSs) which have important applications in biotechnology. We have purified a novel EPS from deep-sea bacterium Zunongwangia profunda SM-A87, identified its glycosyl composition and linkage, and optimized its production to 8.9 g/l in previous studies. To reduce the fermentation cost, an economical fermentation medium containing 60.9 % whey, 10 g/l soybean meal, and 2.9 % NaCl was developed. The EPS yield of batch fermentation in this medium reached 12.1 ± 0.3 g/l. Fed-batch fermentation was conducted and led to an EPS yield of 17.2 ± 0.4 g/l, which represents the highest EPS yield ever reported for a marine bacterium. The EPS was extracted and it displayed good rheological properties, moisture-retention ability, and antioxidant activity. Particularly, its moisture-retention ability is superior to that of other marine bacterial EPSs reported to date. SM-A87 EPS also showed high antioxidant activity. These results suggest that SM-A87 EPS has promising potentials in biotechnology.
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Affiliation(s)
- Mei-Ling Sun
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100, Shandong Province, China
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Fermentation technologies for the optimization of marine microbial exopolysaccharide production. Mar Drugs 2014; 12:3005-24. [PMID: 24857960 PMCID: PMC4052328 DOI: 10.3390/md12053005] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 04/02/2014] [Accepted: 04/03/2014] [Indexed: 01/13/2023] Open
Abstract
In the last decades, research has focused on the capabilities of microbes to secrete exopolysaccharides (EPS), because these polymers differ from the commercial ones derived essentially from plants or algae in their numerous valuable qualities. These biopolymers have emerged as new polymeric materials with novel and unique physical characteristics that have found extensive applications. In marine microorganisms the produced EPS provide an instrument to survive in adverse conditions: They are found to envelope the cells by allowing the entrapment of nutrients or the adhesion to solid substrates. Even if the processes of synthesis and release of exopolysaccharides request high-energy investments for the bacterium, these biopolymers permit resistance under extreme environmental conditions. Marine bacteria like Bacillus, Halomonas, Planococcus, Enterobacter, Alteromonas, Pseudoalteromonas, Vibrio, Rhodococcus, Zoogloea but also Archaea as Haloferax and Thermococcus are here described as EPS producers underlining biopolymer hyperproduction, related fermentation strategies including the effects of the chemical composition of the media, the physical parameters of the growth conditions and the genetic and predicted experimental design tools.
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Zhao HL, Yang J, Chen XL, Su HN, Zhang XY, Huang F, Zhou BC, Xie BB. Optimization of fermentation conditions for the production of the M23 protease Pseudoalterin by deep-sea Pseudoalteromonas sp. CF6-2 with artery powder as an inducer. Molecules 2014; 19:4779-90. [PMID: 24743935 PMCID: PMC6271819 DOI: 10.3390/molecules19044779] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 04/12/2014] [Accepted: 04/14/2014] [Indexed: 11/16/2022] Open
Abstract
Proteases in the M23 family have specific activities toward elastin and bacterial peptidoglycan. The peptidoglycan-degrading property makes these proteases have potential as novel antimicrobials. Because M23 proteases cannot be maturely expressed in Escherichia coli, it is significant to improve the production of these enzymes in their wild strains. Pseudoalterin is a new M23 protease secreted by the deep-sea bacterium Pseudoalteromonas sp. CF6-2. In this study, the fermentation conditions of strain CF6-2 for pseudoalterin production were optimized using single factor experiments and response surface methodology to improve the enzyme yield. To reduce the fermentation cost, bovine artery powder instead of elastin was determined as a cheap and efficient inducer. Based on single factor experiments, artery powder content, culture temperature and culture time were determined as the main factors influencing pseudoalterin production and were further optimized by the central composite design. The optimal values of these factors were determined as: artery powder of 1.2%, culture temperature of 20.17 °C and culture time of 28.04 h. Under the optimized conditions, pseudoalterin production reached 100.02±9.0 U/mL, more than twice of that before optimization. These results lay a good foundation for developing the biotechnological potential of pseudoalterin.
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Affiliation(s)
- Hui-Lin Zhao
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Jie Yang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Hai-Nan Su
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Xi-Ying Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Feng Huang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
| | - Bai-Cheng Zhou
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Bin-Bin Xie
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
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Ngo AN, Ezoulin MJ, Youm I, Youan BBC. Optimal Concentration of 2,2,2-Trichloroacetic Acid for Protein Precipitation Based on Response Surface Methodology. ACTA ACUST UNITED AC 2014; 5. [PMID: 25750762 DOI: 10.4172/2155-9872.1000198] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
For low protein concentrations containing biological samples (in proteomics) and for non proteinaceous compound assays (in bioanalysis), there is a critical need for a simple, fast, and cost-effective protein enrichment or precipitation method. However, 2,2,2-trichloroacetic acid (TCA) is traditionally used for protein precipitation at ineffective concentrations for very low protein containing samples. It is hypothesized that response surface methodology, can be used to systematically identify the optimal TCA concentration for protein precipitation in a wider concentration range. To test this hypothesis, a central composite design is used to assess the effects of two factors (X1 = volume of aqueous solution of protein, and X2 = volume of TCA solution 6.1N) on the optical absorbance of the supernatant (Y1), and the percentage of protein precipitated (Y2). Using either bovine serum albumin (BSA) as a model protein or human urine (with 20 ppm protein content), 4% w/v (a saddle point) is the optimal concentration of the TCA solution for protein precipitation that is visualized by SDS-PAGE analysis. At this optimal concentration, the Y2-values range from 76.26 to 92.67% w/w for 0.016 to 2 mg/mL of BSA solution. It is also useful for protein enrichment and xenobiotic analysis in protein-free supernatant as applied to tenofovir (a model HIV microbicide). In these conditions, the limit of detection and limit of quantitation of tenofovir are respectively 0.0014 mg/mL and 0.0042 mg/mL. This optimal concentration of TCA provides optimal condition for protein purification and analysis of any xenobiotic compound like tenofovir.
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Affiliation(s)
- Albert N Ngo
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, University of Missouri-Kansas City, Kansas City, Mo 64108, USA
| | - Miezan Jm Ezoulin
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, University of Missouri-Kansas City, Kansas City, Mo 64108, USA
| | - Ibrahima Youm
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, University of Missouri-Kansas City, Kansas City, Mo 64108, USA
| | - Bi-Botti C Youan
- Laboratory of Future Nanomedicines and Theoretical Chronopharmaceutics, Division of Pharmaceutical Sciences, University of Missouri-Kansas City, Kansas City, Mo 64108, USA
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Yingling B, Li C, Honglin W, Zongcheng Y. Application of an integrated statistical design to optimize the cold enzyme hydrolysis conditions for ethanol production. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.02.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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37
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yingling B, zhengfang Y. Application of an integrated statistical design for optimization of culture condition for ammonium removal by Nitrosomonas europaea. PLoS One 2013; 8:e60322. [PMID: 23565225 PMCID: PMC3614901 DOI: 10.1371/journal.pone.0060322] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 02/25/2013] [Indexed: 11/19/2022] Open
Abstract
Statistical methodology was applied to the optimization of the ammonium oxidation by Nitrosomonas europaea for biomass concentration (CB), nitrite yield (YN) and ammonium removal (RA). Initial screening by Plackett-Burman design was performed to select major variables out of nineteen factors, among which NH4Cl concentration (CN), trace element solution (TES), agitation speed (AS), and fermentation time (T) were found to have significant effects. Path of steepest ascent and response surface methodology was applied to optimize the levels of the selected factors. Finally, multi-objective optimization was used to obtain optimal condition by compromise of the three desirable objectives through a combination of weighted coefficient method coupled with entropy measurement methodology. These models enabled us to identify the optimum operation conditions (CN = 84.1 mM; TES = 0.74 ml; AS = 100 rpm and T = 78 h), under which CB = 3.386×108 cells/ml; YN = 1.98 mg/mg and RA = 97.76% were simultaneously obtained. The optimized conditions were shown to be feasible through verification tests.
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Affiliation(s)
- Bao yingling
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, China
| | - Ye zhengfang
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing, China
- * E-mail:
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Characterization of bacterial polysaccharide capsules and detection in the presence of deliquescent water by atomic force microscopy. Appl Environ Microbiol 2012; 78:3476-9. [PMID: 22344657 DOI: 10.1128/aem.00207-12] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We detected polysaccharide capsules from Zunongwangia profunda SM-A87 with atomic force microscopy (AFM). The molecular organization of the capsules at the single-polysaccharide-chain level was reported. Furthermore, we found that with ScanAsyst mode the polysaccharide capsules could be detected even in the presence of deliquescent water covering the capsule.
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