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Wu M, Pakroo S, Nadai C, Molinelli Z, Speciale I, De Castro C, Tarrah A, Yang J, Giacomini A, Corich V. Genomic and functional evaluation of exopolysaccharide produced by Liquorilactobacillus mali t6-52: technological implications. Microb Cell Fact 2024; 23:158. [PMID: 38812023 PMCID: PMC11138040 DOI: 10.1186/s12934-024-02431-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/20/2024] [Indexed: 05/31/2024] Open
Abstract
BACKGROUND This study explores the biosynthesis, characteristics, and functional properties of exopolysaccharide produced by the strain Liquorilactobacillus mali T6-52. The strain demonstrated significant EPS production with a non-ropy phenotype. RESULTS The genomic analysis unveiled genes associated with EPS biosynthesis, shedding light on the mechanism behind EPS production. These genes suggest a robust EPS production mechanism, providing insights into the strain's adaptability and ecological niche. Chemical composition analysis identified the EPS as a homopolysaccharide primarily composed of glucose, confirming its dextran nature. Furthermore, it demonstrated notable functional properties, including antioxidant activity, fat absorption capacity, and emulsifying activity. Moreover, the EPS displayed promising cryoprotective activities, showing notable performance comparable to standard cryoprotective agents. The EPS concentration also demonstrated significant freeze-drying protective effects, presenting it as a potential alternative cryoprotectant for bacterial storage. CONCLUSIONS The functional properties of L. mali T6-52 EPS reveal promising opportunities across various industrial domains. The strain's safety profile, antioxidant prowess, and exceptional cryoprotective and freeze-drying characteristics position it as an asset in food processing and pharmaceuticals.
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Affiliation(s)
- Manyu Wu
- Department of Agronomy Food Natural Resources Animal and Environment (DAFNAE), University of Padova, Padova, Italy
| | - Shadi Pakroo
- Canadian Research Institute for Food Safety, Department of Food Science, University of Guelph, Guelph, ON, N1G 2W1, Canada
| | - Chiara Nadai
- Interdepartmental Centre for Research in Viticulture and Enology (CIRVE), University of Padova, Conegliano, TV, Italy
| | - Zeno Molinelli
- Interdepartmental Centre for Research in Viticulture and Enology (CIRVE), University of Padova, Conegliano, TV, Italy
| | - Immacolata Speciale
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA, Italy
| | - Crisitina De Castro
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, NA, Italy
| | - Armin Tarrah
- Canadian Research Institute for Food Safety, Department of Food Science, University of Guelph, Guelph, ON, N1G 2W1, Canada.
| | - Jijin Yang
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - Alessio Giacomini
- Department of Agronomy Food Natural Resources Animal and Environment (DAFNAE), University of Padova, Padova, Italy
| | - Viviana Corich
- Department of Agronomy Food Natural Resources Animal and Environment (DAFNAE), University of Padova, Padova, Italy
- Interdepartmental Centre for Research in Viticulture and Enology (CIRVE), University of Padova, Conegliano, TV, Italy
- Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Padova, Italy
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Ning Y, Cao H, Zhao S, Gao D, Zhao D. Structure and Properties of Exopolysaccharide Produced by Gluconobacter frateurii and Its Potential Applications. Polymers (Basel) 2024; 16:1004. [PMID: 38611262 PMCID: PMC11013964 DOI: 10.3390/polym16071004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/03/2024] [Accepted: 04/05/2024] [Indexed: 04/14/2024] Open
Abstract
An exopolysaccharide (EPS)-producing bacterium was isolated from apricot fermentation broth and identified as Gluconobacter frateurii HDC-08 (accession number: OK036475.1). HDC-08 EPS is a linear homopolysaccharide mainly composed of glucose linked by α-(1,6) glucoside bonds. It contains C, H, N and S elements, with a molecular weight of 4.774 × 106 Da. Microscopically, it has a smooth, glossy and compact sheet structure. It is an amorphous noncrystalline substance with irregular coils. Moreover, the EPS showed surface hydrophobicity and high thermal stability with a degradation temperature of 250.76 °C. In addition, it had strong antioxidant properties against DPPH radicals, ABPS radicals, hydroxyl radicals and H2O2. The EPS exhibited high metal-chelating activity and strong emulsifying ability for soybean oil, petroleum ether and diesel oil. The milk solidification test indicated that the EPS had good potential in fermented dairy products. In general, all the results demonstrate that HDC-08 EPS has promise for commercial applications as a food additive and antioxidant.
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Affiliation(s)
- Yingying Ning
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (Y.N.); (H.C.); (S.Z.)
| | - Huiying Cao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (Y.N.); (H.C.); (S.Z.)
| | - Shouqi Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (Y.N.); (H.C.); (S.Z.)
| | - Dongni Gao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (Y.N.); (H.C.); (S.Z.)
- Hebei Key Laboratory of Agroecological Safety, Hebei University of Environmental Engineering, Qinhuangdao 066102, China
| | - Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; (Y.N.); (H.C.); (S.Z.)
- Hebei Key Laboratory of Agroecological Safety, Hebei University of Environmental Engineering, Qinhuangdao 066102, China
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3
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Yang Y, Ye G, Qi X, Zhou B, Yu L, Song G, Du R. Exploration of Exopolysaccharide from Leuconostoc mesenteroides HDE-8: Unveiling Structure, Bioactivity, and Food Industry Applications. Polymers (Basel) 2024; 16:954. [PMID: 38611212 PMCID: PMC11013467 DOI: 10.3390/polym16070954] [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: 03/08/2024] [Revised: 03/26/2024] [Accepted: 03/29/2024] [Indexed: 04/14/2024] Open
Abstract
A strain of Leuconostoc mesenteroides HDE-8 was isolated from homemade longan fermentation broth. The exopolysaccharide (EPS) yield of the strain was 25.1 g/L. The EPS was isolated and purified, and the structure was characterized using various techniques, including X-ray diffraction (XRD), nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, high-performance size exclusion chromatography (HPSEC), and scanning electron microscopy (SEM). The monosaccharide composition of the EPS was glucose, with a molecular weight (Mw) of 1.7 × 106 Da. NMR spectroscopy revealed that the composition of the HDE-8 EPS consisted of D-glucose pyranose linked by α-(1→4) and α-(1→6) bonds. The SEM analysis of the EPS showed an irregular sheet-like structure. Physicochemical analysis demonstrated that EPSs exhibit excellent thermal stability and high viscosity, making them suitable for fermentation in heat-processed and acidic foods. Additionally, milk coagulation tests showed that the presence of EPSs promotes milk coagulation when supplemented with sucrose. It suggests that EPSs have wide-ranging potential applications as food additives, improving the texture and taste of dairy products. This study provides practical guidance for the commercial use of HDE-8 EPSs in the food and related industries.
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Affiliation(s)
- Yi Yang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Guangbin Ye
- Institute of Life Sciences, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Xintong Qi
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Bosen Zhou
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Liansheng Yu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Gang Song
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
- Hebei Key Laboratory of Agroecological Safety, Hebei University of Environmental Engineering, Qinhuangdao 066102, China
| | - Renpeng Du
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
- Hebei Key Laboratory of Agroecological Safety, Hebei University of Environmental Engineering, Qinhuangdao 066102, China
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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Liu W, Xing X, Dong Q, Liu X, Li W. Isolation and identification of the alga-symbiotic bacterium Gordonia and characterisation of its exopolysaccharide. Nat Prod Res 2024; 38:523-529. [PMID: 36102747 DOI: 10.1080/14786419.2022.2123477] [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: 05/09/2022] [Accepted: 09/07/2022] [Indexed: 10/14/2022]
Abstract
An exopolysaccharide (EPS)-producing bacterium TD18, isolated from the culture broth of green alga Scenedesmus obliquus, was identified as Gordonia terrae based on the 100% identity of 16S rRNA sequences and designated Gordonia terrae TD18. The results of compositional and structural analyses and physiochemical tests show that (1) the exopolysaccharide produced by G. terrae TD18 (TD18-EPS) is an acidic hetero-polysaccharide with a molecular weight of 23 kDa, consisting of glucose, mannose, galactose and glucuronic acid, and (2) TD18-EPS is of high thermal stability with a degradation temperature of 308 °C, the solution of which is non-Newtonian pseudoplastic fluid exhibiting good emulsifying properties over a wide range of temperatures, pH and NaCl concentrations. Hence, Gordonia terrae TD18 is the first alga-symbiotic Gordonia strain identified thus far, while TD18-EPS is unique in terms of composition and structure, different from the known Gordonia EPS, with excellent physiochemical properties and thus has potential applications in industry.
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Affiliation(s)
- Wang Liu
- Department of Bioengineering, School of Chemical Engineering, Hebei University of Technology, Tianjin, China
| | - Xiangying Xing
- Department of Applied Chemistry, School of Chemical Engineering, Hebei University of Technology, Tianjin, China
| | - Qinglin Dong
- Department of Bioengineering, School of Chemical Engineering, Hebei University of Technology, Tianjin, China
| | - Xiaohang Liu
- Department of Bioengineering, School of Chemical Engineering, Hebei University of Technology, Tianjin, China
| | - Wenna Li
- Department of Bioengineering, School of Chemical Engineering, Hebei University of Technology, Tianjin, China
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5
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Zhang X, Gong J, Huang W, Liu W, Ma C, Liang R, Chen Y, Xie Z, Li P, Liao Q. Structural Analysis and Antioxidant and Immunoregulatory Activities of an Exopolysaccharide Isolated from Bifidobacterium longum subsp. longum XZ01. Molecules 2023; 28:7448. [PMID: 37959867 PMCID: PMC10649592 DOI: 10.3390/molecules28217448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 10/27/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023] Open
Abstract
Bifidobacterium longum subsp. longum XZ01 (BLSL1) is a new strain (isolated from the intestines of healthy people and deposited with the preservation number GDMCC 61618). An exopolysaccharide, S-EPS-1, was successfully isolated from the strain and then systematically investigated for the first time. Some structural features of S-EPS-1 were analyzed by chemical component, HPLC, ultraviolet, infrared, and nuclear magnetic resonance spectrum analyses. These analyses revealed that S-EPS-1 is a neutral heteropolysaccharide with an α-configuration. It contains mainly mannose and glucose, as well as small amounts of rhamnose and galactose. The molecular weight of S-EPS-1 was calculated to be 638 kDa. Several immunoregulatory activity assays indicated that S-EPS-1 could increase proliferation, phagocytosis, and NO production in vitro. In addition, S-EPS-1 could upregulate the expression of cytokines at the mRNA level through TLR4-mediated activation of the NF-κB signaling pathway in RAW 264.7 cells. Finally, S-EPS-1 was demonstrated to exhibit antioxidant activity by ABTS+• scavenging, DPPH• scavenging, and ferric-ion reducing power assays. Furthermore, S-EPS-1 can protect cells from oxidative stress and shows no cytotoxicity. These beneficial effects can be partly attributed to its antioxidant ability. Thus, the antioxidant S-EPS-1 may be applied as a functional food in the future.
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Affiliation(s)
- Xingyuan Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Jing Gong
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Wenyi Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Wen Liu
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China; (W.L.); (C.M.); (Z.X.)
| | - Chong Ma
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China; (W.L.); (C.M.); (Z.X.)
| | - Rongyao Liang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Ye Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Zhiyong Xie
- School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen 518106, China; (W.L.); (C.M.); (Z.X.)
| | - Pei Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
| | - Qiongfeng Liao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (X.Z.); (J.G.); (W.H.); (R.L.); (Y.C.)
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6
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Srinivash M, Krishnamoorthi R, Mahalingam PU, Malaikozhundan B. Exopolysaccharide from Lactococcus hircilactis CH4 and Lactobacillus delbrueckii GRIPUMSK as new therapeutics to treat biofilm pathogens, oxidative stress and human colon adenocarcinoma. Int J Biol Macromol 2023; 250:126171. [PMID: 37558015 DOI: 10.1016/j.ijbiomac.2023.126171] [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: 01/31/2023] [Revised: 08/01/2023] [Accepted: 08/05/2023] [Indexed: 08/11/2023]
Abstract
Naturally occurring biopolymers like exopolysaccharides (EPS) secreted by lactic acid bacteria (LAB) has gained significant attention as they are cost effective, renewable and safe. In order to prevent the rapid increase in antibiotic resistant bacteria, the EPS of LAB offers novel approach of targeting the antibiotic resistant pathogens by limiting their effects on environment. Accordingly, in this study, the production, purification, characterization and biological properties of exopolysaccharides from Lactococcus hircilactis strain CH4 and Lactobacillus delbrueckii strain GRIPUMSK were performed. The optimization of lactic acid bacterial strains for exopolysaccharide production was done by response surface methodology and changing the carbon sources in the growth media. The carbohydrate and protein of exopolysaccharide 1 were 79.7 % and 8.7 % respectively and exopolysaccharide 2 were 75.2 % and 9.3 % respectively. When compared with the commercial emulsifier sodium dodecyl sulfate, both the exopolysaccharides have shown good emulsifying activity. Both the exopolysaccharides were linear homo-polysaccharide as determined by Fourier transform infrared spectroscopy and Nuclear magnetic resonance spectra. Scanning electron microscopy showed that the exopolysaccharides were porous and capable of holding water. The exopolysaccharides were partially crystalline as confirmed by X-ray diffraction spectra. Exopolysaccharides from L. hircilactis and L. delbrueckii exhibited significant antimicrobial activity against H. pylori, S. flexneri, S. pyogenes, E. faecalis and C. albicans. Both the exopolysaccharides revealed significant 2,2-diphenyl-1-picrylhydrazyl and hydrogen peroxide scavenging ability with the IC50 value of 100 μg/ml and 80 μg/ml respectively. Exopolysaccharides from L. hircilactis and L. delbrueckii at 100 μg/ml showed significant anticancer activity on HT-29 cells with 58.4 % and 58.7 % respectively. These findings proved that exopolysaccharides from the two selected lactic acid bacterial strains could be explored as natural bioactive carbohydrate polymer for biomedical applications.
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Affiliation(s)
- Moovendran Srinivash
- Department of Biology, The Gandhigram Rural Institute (Deemed to be University), Gandhigram, Dindigul 624302, Tamil Nadu, India
| | - Raman Krishnamoorthi
- Plant Pathology Division, Indian Cardamom Research Institute, Spices Board (Ministry of Commerce and Industry, Government of India), Myladumpara- 685553, Idukki, Kerala, India.
| | - Pambayan Ulagan Mahalingam
- Department of Biology, The Gandhigram Rural Institute (Deemed to be University), Gandhigram, Dindigul 624302, Tamil Nadu, India.
| | - Balasubramanian Malaikozhundan
- Department of Biology, The Gandhigram Rural Institute (Deemed to be University), Gandhigram, Dindigul 624302, Tamil Nadu, India
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Cui Y, Dong S, Qu X. New progress in the identifying regulatory factors of exopolysaccharide synthesis in lactic acid bacteria. World J Microbiol Biotechnol 2023; 39:301. [PMID: 37688654 DOI: 10.1007/s11274-023-03756-4] [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: 08/17/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
The exopolysaccharides (EPSs) of lactic acid bacteria (LAB) have presented various bioactivities and beneficial characteristics, rendering their vast commercial value and attracting a broad interest of researchers. The diversity of EPS structures contributes to the changes of EPS functions. However, the low yield of EPS of LAB has severely limited these biopolymers' comprehensive studies and applications in different areas, such as functional food, health and medicine fields. The clarification of biosynthesis mechanism of EPS will accelerate the synthesis and reconstruction of EPS. In recent years, with the development of new genetic manipulation techniques, there has been significant progress in the EPS biosynthesis mechanisms in LAB. In this review, the structure of LAB-derived EPSs, the EPS biosynthesis basic pathways in LAB, the EPS biosynthetic gene cluster, and the regulation mechanism of EPS biosynthesis will be summarized. It will focus on the latest progress in EPS biosynthesis regulation of LAB and provide prospects for future related developments.
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Affiliation(s)
- Yanhua Cui
- Department of Food Nutrition and Health, School of Medicine and Health, Harbin Institute of Technology, Harbin, 150001, China.
| | - Shiyuan Dong
- Department of Food Nutrition and Health, School of Medicine and Health, Harbin Institute of Technology, Harbin, 150001, China
| | - Xiaojun Qu
- Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin, 150010, China
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He X, Xiao W, Zeng J, Tang J, Wang L. Detoxification and removal of arsenite by Pseudomonas sp. SMS11: Oxidation, biosorption and bioaccumulation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 336:117641. [PMID: 36868151 DOI: 10.1016/j.jenvman.2023.117641] [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: 12/17/2022] [Revised: 01/30/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Arsenite [As(III)] oxidizing bacteria have been widely studied for their detoxification ability through transforming As(III) into arsenate [As(V)]. However, few was focused on removal capacity of arsenic (As). In the current study, As(III) oxidation accompanied with removal of total As was observed in Pseudomonas sp. SMS11. The biosorption (unbinding and surface binding) and bioaccumulation (intracellular uptake) of As by the cells were investigated. Biosorption isotherm was defined adequately by Langmuir and Freundlich models. Biosorption kinetics was recommended by pseudo second-order model. For comparison, the bacteria were inoculated in pure water or culture media amended with different concentrations of As(III) to evaluate the remediation capacity without or with bacterial growth. After removing unbound As, surface bound and intracellular As were sequentially separated using EDTA elution and acidic extraction from bacterial cells. Without bacterial growth, oxidation of As(III) was retarded and the maximum values of surface bound and intracellular As were 4.8 and 10.5 mg/g, respectively. Efficient oxidation and high adsorption capacity were observed after bacterial growth. The surface bound and intracellular As achieved up to 555.0 and 2421.5 mg/g, respectively. Strain SMS11 exhibited great accumulation capacity of As in aqueous solutions, indicating potential application in detoxification and removal of As(III) contamination. The results also suggested that bioremediation via bacteria should be based on living cells and bacterial growth rate.
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Affiliation(s)
- Xiaoman He
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Weiwei Xiao
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Jiayuan Zeng
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Jie Tang
- Department of Clinical Pharmacology, Xiangya Hospital, Central South University, Changsha, 410008, China.
| | - Lin Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
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Lin Y, Gu H, Jia X, Wang W, Hong B, Zhang F, Yin H. Rhizoctonia solani AG1 IA extracellular polysaccharides: Structural characterization and induced resistance to rice sheath blight. Int J Biol Macromol 2023; 244:125281. [PMID: 37330100 DOI: 10.1016/j.ijbiomac.2023.125281] [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: 02/01/2023] [Revised: 05/29/2023] [Accepted: 06/07/2023] [Indexed: 06/19/2023]
Abstract
Sheath blight, caused by Rhizoctonia solani (R. solani), is one of the most serious diseases of rice. Extracellular polysaccharides (EPS) are complex polysaccharides secreted by microbes that have a pivotal role in the plant-microbe interaction. At present, many studies have been carried out on R. solani, but it is not very clear whether the EPS is secreted by R. solani exists. Therefore, we isolated and extracted the EPS from R. solani, two kinds of EPS (EW-I and ES-I) were obtained by DEAE-cellulose 52 and Sephacryl S-300HR column further purification, and their structures were characterized by FT-IR, UV, GC, and NMR analysis. The results showed that EW-I and ES-I had similar monosaccharide composition but different molar ratio, they were composed of fucose, arabinose, galactose, glucose, and mannose with a ratio of 7.49: 27.72: 2.98: 6.66: 55.15 and 3.81: 12.98: 6.15: 10.83: 66.23, and their backbone may be composed of →2)-α-Manp-(1→ residues, beside ES-I was highly branched compared to EW-I. The exogenous application of EW-I and ES-I had no effect on the growth of R. solani AG1 IA itself, but their pretreatment of rice induced plant defense through activation of the salicylic acid pathway, resulting in enhanced resistance to sheath blight.
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Affiliation(s)
- Yudie Lin
- College of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China; Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Hui Gu
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiaochen Jia
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenxia Wang
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Bo Hong
- Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 715299, China
| | - Fuyun Zhang
- College of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China
| | - Heng Yin
- Dalian Engineering Research Center for Carbohydrate Agricultural Preparations, Dalian Technology Innovation Center for Green Agriculture, Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
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Jin H, Park J, Li R, Ji GE, Johnston TV, Choe D, Park SH, Park MS, Ku S. A randomized, double-blind, controlled human study: The efficacy of exopolysaccharides in milk fermented by Weissella confusa VP30 (VP30-EPS) to ameliorate functional constipation. J Funct Foods 2023. [DOI: 10.1016/j.jff.2023.105491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
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11
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Ren Y, Pei F, Cao X, Zhang W, Du R, Ge J, Ping W. Purification of exopolysaccharides from Lactobacillus rhamnosus and changes in their characteristics by regulating quorum sensing genes via polyphenols. Int J Biol Macromol 2023; 240:124414. [PMID: 37059280 DOI: 10.1016/j.ijbiomac.2023.124414] [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: 01/26/2023] [Revised: 03/24/2023] [Accepted: 04/07/2023] [Indexed: 04/16/2023]
Abstract
To explore the effect of Lonicera caerulea fruit polyphenols (LCP) on caries-causing bacteria, strain RYX-01 with high production of biofilm and exopolysaccharides (EPS) was isolated from the oral cavity of caries patients and was identified as Lactobacillus rhamnosus by 16S rDNA analysis and morphology. The characteristics of EPS produced by RYX-01 (EPS-CK) and those produced by adding L. caerulea fruit polyphenols (EPS-LCP) were compared to reveal whether LCP reduced the cariogenicity of RYX-01 by influencing the structure and composition of EPS. The results showed that LCP could increase the content of galactose in EPS and destroy the original aggregation state of EPS-CK but had no significant effect on the molecular weight and functional group composition of EPS (p > 0.05). At the same time, LCP could inhibit the growth of RYX-01, reduce EPS and biofilm formation and inhibit the expression of quorum sensing (QS, luxS)- and biofilm formation (wzb)-related genes. Therefore, LCP could change the surface morphology, content and composition of RYX-01 EPS and reduce the cariogenic effect of EPS and biofilm. In conclusion, LCP can be used as a potential plaque biofilm inhibitor and QS inhibitor in drugs and functional foods.
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Affiliation(s)
- Yanxin Ren
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Fangyi Pei
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Office of Academic Research, Qiqihar Medical University, Qiqihar 161000, China
| | - Xinbo Cao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Wen Zhang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Renpeng Du
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao 066102, China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao 066102, China.
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China; Hebei University of Environmental Engineering, Hebei Key Laboratory of Agroecological Safety, Qinhuangdao 066102, China
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12
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Yang Y, Jiang G, Tian Y. Biological activities and applications of exopolysaccharides produced by lactic acid bacteria: a mini-review. World J Microbiol Biotechnol 2023; 39:155. [PMID: 37039945 DOI: 10.1007/s11274-023-03610-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 04/05/2023] [Indexed: 04/12/2023]
Abstract
Exopolysaccharides (EPSs) are naturally occurring high-molecular-weight carbohydrates that have been widely studied for their biological activities, including antioxidant, immunomodulatory, anticancer and gut microbiota regulation activities. Polysaccharides are abundant in nature and can be derived from animals, plants, algae, and microorganisms, but among polysaccharides with potential uses, EPSs from microorganisms have the advantages of a short production cycle, high yield, and independence of production from season and climate and thus have broad prospects. While the safety of the producing microorganism can represent a problem in application of microbial EPSs, lactic acid bacteria (LAB) have been used by humans for thousands of years, and they and their products are generally recognized as safe. This makes LAB excellent sources for exopolysaccharides. EPS-producing LAB are readily found in nature. Through screening of strains, optimization of culture conditions, and improvement of the growth medium, the yield of EPSs from LAB can be increased and the scope of application broadened. This review summarizes EPSs from LAB in terms of structure, function and applications, as well as yield optimization, and introduces recent research on the biological activities and practical applications of LAB EPSs, aiming to provide references for researchers in related areas.
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Affiliation(s)
- Yi Yang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China
| | - Guangyang Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China
| | - Yongqiang Tian
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, PR China.
- Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, 610065, PR China.
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Yalmanci D, Dertli E, Tekin-Cakmak ZH, Karasu S. Utilization of exopolysaccharide produced by Leuconostoc lactis GW-6 as an emulsifier for low-fat mayonnaise production. Int J Biol Macromol 2023; 226:772-779. [PMID: 36521704 DOI: 10.1016/j.ijbiomac.2022.12.069] [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: 07/22/2022] [Revised: 12/02/2022] [Accepted: 12/07/2022] [Indexed: 12/14/2022]
Abstract
This study aimed to investigate the potential usage of exopolysaccharide (EPS) produced by Leuconostoc lactis GW-6 species as an emulsifier in a low-fat mayonnaise by the formation of a complex with whey protein isolate (WPI) to improve rheological properties, emulsion, and oxidative stability. For the determination of rheological properties, the flow behavior, frequency sweep, and 3-ITT rheological properties of low-fat mayonnaise samples were studied. All samples showed shear thinning, viscoelastic solid-like, and recoverable character. The K and n values for the mayonnaise samples were determined as 24.529-174.403 Pa.sn and 0.166-0.304, respectively, indicating that shear-thinning characters could be improved with WPI-EPS interaction. The higher K' and K″ values of all low-fat samples prepared with EPS-WPI than the low-fat control sample explained the synergistic effect of EPS and WPI. Importantly, no effect was observed when WPI was used as alone as an emulsifier. Oxidative stability was tested by OXITEST and IP values of samples prepared by WPI and EPS were compared to control samples. In conclusion, the results of this study showed that the EPS and WPI interaction can significantly affect the rheological properties and emulsion and oxidative stability of mayonnaise samples.
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Affiliation(s)
- Dilara Yalmanci
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Enes Dertli
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Zeynep Hazal Tekin-Cakmak
- Department of Nutrition and Dietetics, Health Sciences Faculty, Istinye University, İstanbul 34010, Turkey
| | - Salih Karasu
- Department of Food Engineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey.
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14
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Du R, Yu L, Sun M, Ye G, Yang Y, Zhou B, Qian Z, Ling H, Ge J. Characterization of Dextran Biosynthesized by Glucansucrase from Leuconostoc pseudomesenteroides and Their Potential Biotechnological Applications. Antioxidants (Basel) 2023; 12:antiox12020275. [PMID: 36829833 PMCID: PMC9952297 DOI: 10.3390/antiox12020275] [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: 11/14/2022] [Revised: 01/17/2023] [Accepted: 01/25/2023] [Indexed: 01/28/2023] Open
Abstract
Glucansucrase was purified from Leuconostoc pseudomesenteroides. The glucansucrase exhibited maximum activity at pH 5.5 and 30 °C. Ca2+ significantly promoted enzyme activity. An exopolysaccharide (EPS) was synthesized by this glucansucrase in vitro and purified. The molecular weight of the EPS was 3.083 × 106 Da. Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy showed that the main structure of glucan was 97.3% α-(1→6)-linked D-glucopyranose units, and α-(1→3) branched chain accounted for 2.7%. Scanning electron microscopy (SEM) observation of dextran showed that its surface was smooth and flaky. Atomic force microscopy (AFM) of dextran revealed a chain-like microstructure with many irregular protuberances in aqueous solution. The results showed that dextran had good thermal stability, water holding capacity, water solubility and emulsifying ability (EA), as well as good antioxidant activity; thus it has broad prospects for development in the fields of food, biomedicine, and medicine.
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Affiliation(s)
- Renpeng Du
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Liansheng Yu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Meng Sun
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Guangbin Ye
- School of Basic Medical Sciences, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Yi Yang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Bosen Zhou
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Zhigang Qian
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongzhi Ling
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
- Correspondence: (H.L.); (J.G.); Tel.: +86-0451-86609134 (H.L.); Fax: +86-0451-86608046 (J.G.)
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Plant Genetic Engineering and Biological Fermentation Engineering for Cold Region & Key Laboratory of Microbiology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin 150080, China
- Correspondence: (H.L.); (J.G.); Tel.: +86-0451-86609134 (H.L.); Fax: +86-0451-86608046 (J.G.)
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15
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Yalmanci D, İspirli H, Dertli E. Identification of Lactic Acid Bacteria (LAB) from pre-fermented liquids of selected cereals and legumes and characterization of their exopolysaccharides (EPS). FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Saravanaraj A, Sivanesh N, Anusha S, Surianarayanan M. Metabolic behaviour of Halomanas variabilis in a bio-reaction calorimeter during batch production of extracellular polymeric substances. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Li F, Hu X, Sun X, Li H, Lu J, Li Y, Bao M. Effect of fermentation pH on the structure, rheological properties, and antioxidant activities of exopolysaccharides produced by Alteromonas australica QD. Glycoconj J 2022; 39:773-787. [PMID: 36367683 DOI: 10.1007/s10719-022-10087-3] [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: 06/29/2022] [Revised: 09/01/2022] [Accepted: 10/11/2022] [Indexed: 11/13/2022]
Abstract
The pH value was essential for the growth and metabolism of microorganisms. Acidic pH exopolysaccharide (AC-EPS) and alkaline pH exopolysaccharide (AL-EPS) secreted by A. australica QD mediated by pH were studied in this paper. The total carbohydrate content and molecular weight of AC-EPS (79.59% ± 2.24% (w/w), 8.374 × 105 Da) and AL-EPS (82.48% ± 1.46% (w/w), 6.182 × 105 Da) were estimated and compared. In AC-EPS, mannose (3.78%) and galactose (3.24%) content was more, while the proportion of glucuronic acid was less in comparison to AL-EPS. The scanning electron microscopy revealed the structural differences among the AC-EPS and AL-EPS. Thermogravimetric analysis showed degradation temperatures of 272.8 °C and 244.9 °C for AC-EPS and AL-EPS, respectively. AC-EPS was found to exhibit better rheological properties and emulsifying capabilities, while AL-EPS had superior antioxidant activities. Overall, both AC-EPS and AL-EPS have the potential to be used as emulsifiers and biological antioxidants.
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Affiliation(s)
- Fengshu Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xin Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xiaojun Sun
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Haoshuai Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Jinren Lu
- College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Yiming Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China.,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China. .,College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
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18
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Li F, Hu X, Qin L, Li H, Yang Y, Zhang X, Lu J, Li Y, Bao M. Characterization and protective effect against ultraviolet radiation of a novel exopolysaccharide from Bacillus marcorestinctum QDR3-1. Int J Biol Macromol 2022; 221:1373-1383. [PMID: 36151616 DOI: 10.1016/j.ijbiomac.2022.09.114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/06/2022] [Accepted: 09/12/2022] [Indexed: 11/05/2022]
Abstract
Although exopolysaccharide (EPS) has been applied to various fields, EPS for UVR-mediated oxidative stress repair still needs further exploration. In this study, a novel EPS was isolated from the fermentation medium of Bacillus sp. QDR3-1 and its yield was 4.8 g/L (pH 8.0, 12 % glucose, 30 °C and 6 % NaCl). The pure fraction (named EPS-M1) was purified by DEAE-cellulose and Sephadex G-100 column. EPS-M1 was a heteropolysaccharide composed of Man, Glc, Gal, and Fuc with a molecular weight of 33.8 kDa. Scanning electron microscopy (SEM) observed a rough surface and reticular structure of EPS-M1, and EPS-M1 formed spherical aggregates in aqueous solution observed in atomic force microscopy (AFM). Thermal analysis revealed that the degradation temperature of EPS-M1 was 306 °C. Moreover, methylation and NMR analysis determined that EPS-M1 was consisted of →3)-Manp-(1→, →2,6)-Manp-(1→, →4,6)-Glcp-(1→, →3)-Glcp-(1→, →4)-Galp-(1→, →4)-Fucp-(1→, and T-Manp-(1→. Furthermore, the cytotoxicity and the repair ability of UVR-mediated cell damage of EPS-M1 were studied with L929 cells. The results showed that EPS-M1 had good biocompatibility and it could mitigate UVR-mediated cell damage by regulating the levels of cellular reactive oxygen species (ROS), depolarization of mitochondrial membrane potential (MMP) and Caspase-3/7 activity. Overall, the structure analysis and the protective effects of EPS against L929 cells exposed to UVR provided an experimental basis for EPS in practical applications.
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Affiliation(s)
- Fengshu Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xin Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Liying Qin
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
| | - Haoshuai Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Yan Yang
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
| | - Xiuli Zhang
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Jinren Lu
- College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Yiming Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, and Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao 266100, China.
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Characterization of exopolysaccharide produced by Levilactobacillus brevis HDE-9 and evaluation of its potential use in dairy products. Int J Biol Macromol 2022; 217:303-311. [PMID: 35839950 DOI: 10.1016/j.ijbiomac.2022.07.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/01/2022] [Accepted: 07/08/2022] [Indexed: 11/21/2022]
Abstract
The bacterial strain HDE-9 was isolated from sauerkraut and identified as Levilactobacillus brevis. An exopolysaccharide (EPS) was isolated and purified from L. brevis HDE-9, and a preliminary investigation of its structural characteristics and biological activity was conducted. The molecular weight of the EPS was >1.0 × 106 Da. Fourier transform infrared (FT-IR) spectroscopy and nuclear magnetic resonance (NMR) spectroscopy revealed that the EPS was composed of α-(1 → 6) linked d-glucopyranose units. X-ray diffraction (XRD) data on the EPS revealed its non-crystalline amorphous structure. Scanning electron microscopy (SEM) of the EPS revealed a smooth surface with sheet structures. The EPS exhibited the high value in thermal stability, water solubility, water holding capacity (WHC), and emulsification activity (EA). The water contact angle of the EPS revealed relatively high hydrophobicity in the presence of sucrose. The EPS also showed a strong milk solidification capacity in a dose-dependent manner. The EPS could significantly improve the texture of yoghurt, indicating its potential application as a functional starter in the production of fermented dairy products.
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Adeosun IJ, Baloyi IT, Cosa S. Anti-Biofilm and Associated Anti-Virulence Activities of Selected Phytochemical Compounds against Klebsiella pneumoniae. PLANTS 2022; 11:plants11111429. [PMID: 35684202 PMCID: PMC9182603 DOI: 10.3390/plants11111429] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 12/11/2022]
Abstract
The ability of Klebsiella pneumoniae to form biofilm renders the pathogen recalcitrant to various antibiotics. The difficulty in managing K. pneumoniae related chronic infections is due to its biofilm-forming ability and associated virulence factors, necessitating the development of efficient strategies to control virulence factors. This study aimed at evaluating the inhibitory potential of selected phytochemical compounds on biofilm-associated virulence factors in K. pneumoniae, as well as authenticating their antibiofilm activity. Five phytochemical compounds (alpha-terpinene, camphene, fisetin, glycitein and phytol) were evaluated for their antibacterial and anti-biofilm-associated virulence factors such as exopolysaccharides, curli fibers, and hypermucoviscosity against carbapenem-resistant and extended-spectrum beta-lactamase-positive K. pneumoniae strains. The antibiofilm potential of these compounds was evaluated at initial cell attachment, microcolony formation and mature biofilm formation, then validated by in situ visualization using scanning electron microscopy (SEM). Exopolysaccharide surface topography was characterized using atomic force microscopy (AFM). The antibacterial activity of the compounds confirmed fisetin as the best anti-carbapenem-resistant K. pneumoniae, demonstrating a minimum inhibitory concentration (MIC) value of 0.0625 mg/mL. Phytol, glycitein and α-terpinene showed MIC values of 0.125 mg/mL for both strains. The assessment of the compounds for anti-virulence activity (exopolysaccharide reduction) revealed an up to 65.91% reduction in phytol and camphene. Atomic force microscopy detected marked differences between the topographies of untreated and treated (camphene and phytol) exopolysaccharides. Curli expression was inhibited at both 0.5 and 1.0 mg/mL by phytol, glycitein, fisetin and quercetin. The hypermucoviscosity was reduced by phytol, glycitein, and fisetin to the shortest mucoid string (1 mm) at 1 mg/mL. Phytol showed the highest antiadhesion activity against carbapenem-resistant and extended-spectrum beta-lactamase-positive K. pneumoniae (54.71% and 50.05%), respectively. Scanning electron microscopy correlated the in vitro findings, with phytol significantly altering the biofilm architecture. Phytol has antibiofilm and antivirulence potential against the highly virulent K. pneumoniae strains, revealing it as a potential lead compound for the management of K. pneumoniae-associated infections.
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A novel exopolysaccharide produced by Zygosaccharomyces rouxii with cryoprotective and freeze-drying protective activities. Food Chem 2022; 392:133304. [PMID: 35636192 DOI: 10.1016/j.foodchem.2022.133304] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/29/2022] [Accepted: 05/22/2022] [Indexed: 02/08/2023]
Abstract
In the present work, a novel exopolysaccharide EPS-3791 was extracted and purified from a salt-tolerant yeast, Zygosaccharomyces rouxii. Structural analyses showed that EPS-3791 was composed of galactose, glucose and mannose in a molar ration of 1.00: 4.25: 13.30 with a molecular weight of 64.412 kDa. Fourier transform infrared spectroscopy manifested the main functional groups, α- and β- configurations. Methylated analysis indicated T-Manp-(1→, →2)-Glcp-(1 → and → 2,6)-Manp-(1 → were the main linkages. 800 MHz nuclear magnetic resonance spectroscopy demonstrated the EPS-3791 structure of a novel main chain and branched chain. Atomic force microscope and scanning electron microscope revealed a homogeneous and uniform porous structure. In addition, EPS-3791 was proven to have cryoprotective and freeze-drying protective effects on Lactococcus lactis, and exhibited better protective performance than that of trelahose during freeze-drying of L. lactis, suggesting that EPS-3791 could be developed into cryoprotectant or lyoprotectant applied in food industry.
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22
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Purification, characterization and partial biological activities of exopolysaccharide produced by Saccharomyces cerevisiae Y3. Int J Biol Macromol 2022; 206:777-787. [DOI: 10.1016/j.ijbiomac.2022.03.083] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 03/13/2022] [Accepted: 03/14/2022] [Indexed: 11/20/2022]
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Structural Characterization of Exopolysaccharide Produced by Leuconostoccitreum B-2 Cultured in Molasses Medium and Its Application in Set Yogurt. Processes (Basel) 2022. [DOI: 10.3390/pr10050891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Sugarcane molasses is an agricultural by-product containing sucrose. In this study, the exopolysaccharide (M-EPS) produced by Leuconostoc citreum B-2 in molasses-based medium was characterized, optimized, and its application in set yogurt was investigated. The structure analysis, including gel permeation chromatography, Fourier transform infrared spectroscopy, and nuclear magnetic resonance, revealed that the M-EPS was a linear dextran composed of D-glucose units, which were linked by α-(1→6) glycosidic bonds with 19.3% α-(1→3) branches. The M-EPS showed a lower molecular weight than that produced from sucrose. The M-EPS was added into the set yogurt, and then the water holding capacity, pH, and microstructure of set yogurt were evaluated. Compared with the controls, the addition of M-EPS improved the water holding capacity and reduced the pH of set yogurt. Meanwhile, the structure of the three-dimensional network was also observed in the set yogurt containing M-EPS, indicating that M-EPS had a positive effect on the stability of set yogurt. The results provide a theoretical basis for the cost-effective utilization of sugarcane molasses.
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Physicochemical and Anti-UVB-Induced Skin Inflammatory Properties of Lacticaseibacillus paracasei Subsp. paracasei SS-01 Strain Exopolysaccharide. FERMENTATION 2022. [DOI: 10.3390/fermentation8050198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The exopolysaccharide secreted by Lacticaseibacillus paracasei subsp. paracasei SS-01 strain (LP-EPS) is isolated and purified from yogurt. It is a polysaccharide with a branched and multi-stranded structure, which exists in a smooth rod-like or cloud-like state, and possesses a good thermal stability and a molecular weight of 49.68 kDa (±4.436%). LP-EPS shows a high antioxidant capacity, anti-inflammatory and anti-sensitizing activity during in vitro experimental studies, with half clearance (IC50) rates of 0.449, 1.314, and 2.369 mg/mL for the ABTS, DPPH, and OH radicals, respectively, and a half inhibition rate (IC50) of hyaluronidase of 1.53 mg/mL. A cell-based assay, enzyme-linked immunosorbent assay (ELISA), and quantitative real-time fluorescence PCR (qRT-PCR) show that LP-EPS effectively treats or ameliorates the skin inflammatory responses triggered by UVB irradiation, as evidenced by a highly significant decrease in the secretion of inflammatory factors by human skin keratinocytes (HaCaT), and a highly significant downregulation of the mRNA expression of MAPK/AP-1 pathway cytokines.
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25
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Du R, Pei F, Kang J, Zhang W, Wang S, Ping W, Ling H, Ge J. Analysis of the structure and properties of dextran produced by Weissella confusa. Int J Biol Macromol 2022; 204:677-684. [PMID: 35181327 DOI: 10.1016/j.ijbiomac.2022.02.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 12/12/2021] [Accepted: 02/08/2022] [Indexed: 02/06/2023]
Abstract
An EPS produced by Weissella confusa H2 was purified through Sephadex G-100, and the preliminary structure characteristics and biological activities of H2 EPS were analyzed. Molecular mass of purified H2 EPS was 2.705 × 106 Da as measured with gel permeation chromatography (GPC). Composition of monosaccharides, nuclear magnetic resonance (NMR) spectroscopy spectroscopy and fourier transform infrared (FT-IR) showed that the EPS was a linear homopolysaccharide, mainly constituted of glucose and it is suggested that the EPS was dextran with α-(1 → 6) glycosidic bonds and a few α-(1 → 3) branches. Atomic force micrograph (AFM) and scanning electron microscopy (SEM) analysis of dextran further revealed sheets branched microstructure anchored with many irregular protuberances in aqueous solution. The XRD pattern reflected non-crystalline amorphous nature. In addition, the solubility, water-holding capacity, thermal property, rheological property and heavy metal chelating activity of the purified H2 dextran were determined. The dissolution percentage and water holding capacity of the dextran were 98.78 ± 1.37% and 426.03 ± 7.26%, respectively. The dextran exhibited good hydrophilicity, thermal stability and heavy metal chelating activity. Rheological studies exhibited rotational speed, pH, temperature, metal ions solutions dependent semiviscous nature. These results support its use as an additive in the food and environmental protection fields.
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Affiliation(s)
- Renpeng Du
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Fangyi Pei
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Jie Kang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Wen Zhang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Shuo Wang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China
| | - Hongzhi Ling
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China.
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin 150500, PR China; Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin 150080, PR China.
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26
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Ji H, Cao H, Zhao L, Na R, Ping W, Ge J, Zhao D. The response surface optimization of β-mannanase produced by Weissella cibaria F1 and its potential in juice clarification. Prep Biochem Biotechnol 2022; 52:1151-1159. [PMID: 35175890 DOI: 10.1080/10826068.2022.2033993] [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: 10/19/2022]
Abstract
A β-mannanase-producing lactic acid bacteria (LAB) was identified as Weissella cibaria F1 according to physiological and biochemical properties, morphological observations, partial sequence of 16S rRNA gene and API 50 CHL test. In order to improve the yield of β-mannanase, the response surface methodology (RSM) was originally used to optimize the fermentation conditions. The optimization results showed that when the konjac powder, glucose, and initial pH were 9.46 g/L, 14.47 g/L and 5.67, respectively, the β-mannanase activity increased to 38.81 ± 0.33 U/mL, which was 1.33 times compared to initial yield (29.28 ± 0.26 U/mL). This result was also supported by larger clearance on the konjac powder-MRS agar plate through Congo Red dyeing. The W. cibaria F1 β-mannanase could improve the clarity of five fruits juice, i.e., apple, orange, peach, persimmon and blue honeysuckle. Among these, peach juice was the most obvious, clarity increasing by 12.8%. These results collectively indicated that W. cibaria F1 β-mannanase had an applicable potential in food-level fields.
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Affiliation(s)
- Hairui Ji
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Huiying Cao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Li Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Ruiying Na
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
| | - Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, China
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27
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Borkar SR, Bhosle SN. Partial characterization of viscous exopolymer produced by Alkalihalobacillus sp. strain SB-D (KJ372395) with emulsification and adhesive properties. Arch Microbiol 2021; 204:48. [DOI: 10.1007/s00203-021-02679-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/21/2021] [Accepted: 10/25/2021] [Indexed: 10/19/2022]
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28
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Li J, Ai L, Xu F, Hu X, Yao Y, Wang L. Structural characterization of exopolysaccharides from Weissella cibaria NC516.11 in distiller grains and its improvement in gluten-free dough. Int J Biol Macromol 2021; 199:17-23. [PMID: 34952097 DOI: 10.1016/j.ijbiomac.2021.12.089] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 11/03/2021] [Accepted: 12/16/2021] [Indexed: 12/11/2022]
Abstract
In this study, an exopolysaccharide (EPS) was produced by Weissella cibaria NC516.11 isolated from distiller grains of Chinese Baijiu. The structural characterization of EPS determined using fourier transform infrared spectra and nuclear magnetic resonance spectra demonstrated that W. cibaria NC516.11 had α-(1 → 6) (93.46%) d-glucose linkages with a few α-(1 → 3) (6.54%) d-glucose linked branches. The monosaccharide composition of the EPS was glucose, and its molecular weight was 2.82 × 106 Da. Scanning electron microscopy showed that the microstructure of EPS had a three-dimensional structure at low magnification and a particle structure that protruded from the surface at high magnification. The addition of EPS into dough can promote the cross-linking of starch molecules and increase the water-holding capacity. Dynamic rheology indicated that the aqueous solution of EPS is a pseudoplastic fluid, and the higher the concentration of EPS, the greater the viscosity. The addition of EPS to the gluten-free dough showed G' > G", which could increase the viscoelastic properties of the dough and enhance the gluten network.
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Affiliation(s)
- Jun Li
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, No. 3 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Lianzhong Ai
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Feiran Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xintian Hu
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, No. 3 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Yijun Yao
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, No. 3 Wenyuan Road, Nanjing, Jiangsu 210023, China
| | - Lifeng Wang
- College of Food Science and Engineering, Collaborative Innovation Center for Modern Grain Circulation and Safety, Key Laboratory of Grains and Oils Quality Control and Processing, Nanjing University of Finance and Economics, No. 3 Wenyuan Road, Nanjing, Jiangsu 210023, China.
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29
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Jiang G, Gan L, Li X, He J, Zhang S, Chen J, Zhang R, Xu Z, Tian Y. Characterization of Structural and Physicochemical Properties of an Exopolysaccharide Produced by Enterococcus sp. F2 From Fermented Soya Beans. Front Microbiol 2021; 12:744007. [PMID: 34777291 PMCID: PMC8586432 DOI: 10.3389/fmicb.2021.744007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 10/04/2021] [Indexed: 11/13/2022] Open
Abstract
The present study sought to isolate a novel exopolysaccharide (EPS-F2) from Enterococcus sp. F2 through ethanol precipitation, anion-exchange, and gel-filtration chromatography and characterize the physicochemical properties by spectral techniques. EPS-F2 was identified as a neutral homo-exopolysaccharide composed of only glucose with a high molecular weight of 1.108 × 108 g/mol. It contained →6)-α-D-Glcp-(1→ linkage in the main chain and →3, 6)-α-D-Glcp-(1→ branch chain). Moreover, EPS-F2 possessed excellent thermal stability (266.6°C), water holding capacity (882.5%), oil holding capacity (1867.76%), and emulsifying activity against various edible oils. The steady shear experiments exhibited stable pseudo plasticity under various conditions (concentrations, temperatures, and pHs). The dynamic oscillatory measurements revealed that EPS-F2 showed a liquid-like behavior at a low concentration (2.5%), while a solid-like behavior at high concentrations (3.0 and 3.5%). Overall, these results suggest that EPS-F2 could be a potential alternative source of functional additives and ingredients and be applied in food industries.
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Affiliation(s)
- Guangyang Jiang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Longzhan Gan
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Xiaoguang Li
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Juan He
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Shihao Zhang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Jia Chen
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Ruoshi Zhang
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Zhe Xu
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
| | - Yongqiang Tian
- College of Biomass Science and Engineering, Sichuan University, Chengdu, China.,Key Laboratory of Leather Chemistry and Engineering, Sichuan University, Ministry of Education, Chengdu, China
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30
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Abstract
Exopolysaccharides (EPS) are biopolymers produced by many microorganisms, including some species of the genus Acetobacter, Bacillus, Fructobacillus, Leuconostoc, Lactobacillus, Lactiplantibacillus, Pediococcus, Pichia, Rhodotorula, Saccharomycodes, Schizosaccharomyces, and Sphingomonas, which have been reported in the microbiota of traditional fermented beverages. Dextran, levan, glucan, gellan, and cellulose, among others, are EPS produced by these genera. Extracellular biopolymers are responsible for contributing to specific characteristics to fermented products, such as modifying their organoleptic properties or contributing to biological activities. However, EPS can be easily found in the dairy industry, where they affect rheological properties in products such as yogurt or cheese, among others. Over the years, LAB has been recognized as good starter strains in spontaneous fermentation, as they can contribute beneficial properties to the final product in conjunction with yeasts. To the best our knowledge, several articles have reported that the EPS produced by LAB and yeasts possess many both biological and technological properties that can be influenced by many factors in which fermentation occurs. Therefore, this review presents traditional Mexican fermented beverages (tavern, tuba, sotol, and aguamiel) and relates them to the microbial EPS, which affect biological and techno-functional activities.
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31
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Liu L, Xu J, Du R, Ping W, Ge J, Zhao D. The response surface optimization of exopolysaccharide produced by Saccharomyces cerevisiae Y3 and its partial characterization. Prep Biochem Biotechnol 2021; 52:566-577. [PMID: 34550854 DOI: 10.1080/10826068.2021.1972428] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Response surface methodology (RSM) was used to optimize the conditions of exopolysaccharides (EPSs) by Saccharomyces cerevisiae Y3. The results indicated that the yield of EPS reached 4.52 ± 0.14 g/L with 10.30% (w/v) sucrose, 0.64% (w/v) yeast extract, liquid volume 141.5 mL, which was 2.40 times the original EPS yield. Y3 EPS contained 83.65 ± 0.16% of total sugars, 15.27 ± 0.26% of uronic acid, 0.78 ± 0.02% of protein and 0.30 ± 0.12% of sulfuric acid groups. Y3 EPS maintained a relatively low viscosity, with intrinsic viscosities of 306.58 mL/g (25 °C) and 200.91 mL/g (35 °C), respectively. The EPS had high water solubility index (WSI), high water holding capacity (WHC) and good emulsifying ability (EA). Meanwhile, the EPS could absorb metal ions such as Cu2+, Fe2+ and Zn2+. In addition, Y3 EPS exhibited good antioxidant properties and coagulated skim milk with a concentration-dependent manner. These results indicated that S. cerevisiae Y3 EPS had applicable prospects in medicine, food, especially the dairy industry.
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Affiliation(s)
- Lina Liu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China
| | - Jiaju Xu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China
| | - Renpeng Du
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China
| | - Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, PR China.,Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, PR China.,Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi University for Nationalities, Nanning, Guangxi, China
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32
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Gangalla R, Gattu S, Palaniappan S, Ahamed M, Macha B, Thampu RK, Fais A, Cincotti A, Gatto G, Dama M, Kumar A. Structural Characterisation and Assessment of the Novel Bacillus amyloliquefaciens RK3 Exopolysaccharide on the Improvement of Cognitive Function in Alzheimer's Disease Mice. Polymers (Basel) 2021; 13:polym13172842. [PMID: 34502882 PMCID: PMC8434388 DOI: 10.3390/polym13172842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/05/2021] [Accepted: 08/19/2021] [Indexed: 02/07/2023] Open
Abstract
In this study Bacillus amyloliquefaciens RK3 was isolated from a sugar mill effluent-contaminated soil and utilised to generate a potential polysaccharide with anti-Alzheimer's activity. Traditional and molecular methods were used to validate the strain. The polysaccharide produced by B. amyloliquefaciens RK3 was purified, and the yield was estimated to be 10.35 gL-1. Following purification, the polysaccharide was structurally and chemically analysed. The structural analysis revealed the polysaccharide consists of α-d-mannopyranose (α-d-Manp) and β-d-galactopyranose (β-d-Galp) monosaccharide units connected through glycosidic linkages (i.e., β-d-Galp(1→6)β-d-Galp (1→6)β-d-Galp(1→2)β-d-Galp(1→2)[β-d-Galp(1→6)]β-d-Galp(1→2)α-d-Manp(1→6)α-d-Manp (1→6)α-d-Manp(1→6)α-d-Manp(1→6)α-d-Manp). The scanning electron microscopy and energy-dispersive X-ray spectroscopy imaging of polysaccharides emphasise their compactness and branching in the usual tubular heteropolysaccharide structure. The purified exopolysaccharide significantly impacted the plaques formed by the amyloid proteins during Alzheimer's disease. Further, the results also highlighted the potential applicability of exopolysaccharide in various industrial and pharmaceutical applications.
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Affiliation(s)
- Ravi Gangalla
- Department of Microbiology, Kakatiya University, Warangal 506009, India;
| | - Sampath Gattu
- Department of Zoology, School of Life Sciences, Periyar University, Salem 636011, India;
| | - Sivasankar Palaniappan
- Department of Environmental Science, School of Life Sciences, Periyar University, Salem 636011, India
- Correspondence: (S.P.); (R.K.T.)
| | - Maqusood Ahamed
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Baswaraju Macha
- Medicinal Chemistry Division, University College of Pharmaceutical Sciences, Kakatiya University, Warangal 506009, India;
| | - Raja Komuraiah Thampu
- Department of Microbiology, Kakatiya University, Warangal 506009, India;
- Correspondence: (S.P.); (R.K.T.)
| | - Antonella Fais
- Department of Life and Environmental Sciences, University of Cagliari, Monserrato, 09042 Cagliari, Italy;
| | - Alberto Cincotti
- Department of Mechanical, Chemical and Material Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy;
| | - Gianluca Gatto
- Department of Electrical and Electronic Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy; (G.G.); (A.K.)
| | - Murali Dama
- Institute for Plant Cell Biology and Biotechnology, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany;
| | - Amit Kumar
- Department of Electrical and Electronic Engineering, University of Cagliari, Via Marengo 2, 09123 Cagliari, Italy; (G.G.); (A.K.)
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Kant Bhatia S, Gurav R, Choi YK, Choi TR, Kim HJ, Song HS, Mi Lee S, Lee Park S, Soo Lee H, Kim YG, Ahn J, Yang YH. Bioprospecting of exopolysaccharide from marine Sphingobium yanoikuyae BBL01: Production, characterization, and metal chelation activity. BIORESOURCE TECHNOLOGY 2021; 324:124674. [PMID: 33445012 DOI: 10.1016/j.biortech.2021.124674] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Revised: 12/31/2020] [Accepted: 01/02/2021] [Indexed: 06/12/2023]
Abstract
In the present study, an exopolysaccharide (EPS)-producing bacterial strain was isolated from the Eastern Sea (Sokcho Beach) of South Korea and identified as Sphingobium yanoikuyae BBL01. Media optimization was performed using response surface design, and a yield of 2.63 ± 0.02 g/L EPS was achieved. Purified EPS produced using lactose as the main carbon source was analyzed by GC-MS and found to be composed of α-D-xylopyranose (28.6 ± 2.0%), β-D-glucopyranose (21.0 ± 1.6%), α-D-mannopyranose (18.5 ± 1.2%), β-d-mannopyranose (13.1 ± 1.4%), β-D-xylopyranose (10.2 ± 2.1%), α-d-talopyranose (5.9 ± 1.1%), and β-d-galacturonic acid (2.43 ± 0.8%). Interestingly, different carbon sources (glucose, galactose, glycerol, lactose, sucrose, and xylose) showed no effect on EPS monomer composition, with a slight change in the mass percentage of various monosaccharides. Purified EPS was stable up to 233 °C, indicating its possible suitability as a thickening and gelling agent for food-related applications. EPS also showed considerable emulsifying, flocculating, free-radical scavenging, and metal-complexion activity, suggesting various biotechnological applications.
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Affiliation(s)
- Shashi Kant Bhatia
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Applications (CBRU), Konkuk University, Seoul, Republic of Korea
| | - Ranjit Gurav
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Yong-Keun Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Tae-Rim Choi
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Hyun-Joong Kim
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Hun-Suk Song
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sun Mi Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sol Lee Park
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Hye Soo Lee
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea
| | - Yun-Gon Kim
- Department of Chemical Engineering, Soongsil University, 06978 Seoul, Republic of Korea
| | - Jungoh Ahn
- Biotechnology Process Engineering Center, Korea Research Institute Bioscience Biotechnology (KRIBB), Gwahangno, Yuseong-Gu, Daejeon 305-806, Republic of Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, Republic of Korea; Institute for Ubiquitous Information Technology and Applications (CBRU), Konkuk University, Seoul, Republic of Korea.
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34
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Zhao D, Jiang J, Liu L, Wang S, Ping W, Ge J. Characterization of exopolysaccharides produced by Weissella confusa XG-3 and their potential biotechnological applications. Int J Biol Macromol 2021; 178:306-315. [PMID: 33652047 DOI: 10.1016/j.ijbiomac.2021.02.182] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 01/09/2021] [Accepted: 02/25/2021] [Indexed: 11/28/2022]
Abstract
In this study, exopolysaccharides (EPSs) produced by Weissella confusa XG-3 were characterized. The monosaccharide composition of XG-3 EPS was determined to include glucose according to GC data, and its molecular weight was 3.19 × 106 Da, as determined by HPLC. Scanning electron microscopy (SEM) revealed a smooth, porous, and branched structure, and atomic force microscopy (AFM) confirmed the presence of round lumps and chains on irregular surfaces of XG-3 EPS. The results of the Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) analyses suggested that XG-3 EPS is a linear α-(1,6)-linked dextran. X-ray diffraction (XRD) data confirmed the noncrystalline amorphous structure, and the results of the Congo red assay corresponded to the random coiled chain conformation of XG-3 dextran. XG-3 dextran exhibited good radical scavenging activity and reducing power and possessed high thermal stability, with a degradation temperature (Td) of 306.8 °C. The absolute value of the zeta potential and particle size of XG-3 dextran continually increased with increasing dextran concentration. The water contact angle showed that XG-3 dextran had relatively high hydrophobicity in the presence of sucrose. XG-3 dextran stimulated the growth of Lactobacillus spp. and Bifidobacterium spp. These findings indicate that XG-3 dextran has unique characteristics and can be potentially applied as a food additive and an antioxidant.
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Affiliation(s)
- Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China; Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi University for Nationalities, Nanning 530008, China
| | - Jing Jiang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China
| | - Lina Liu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China
| | - Shuo Wang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang 150500, PR China; Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang 150080, PR China.
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Optimization production of exopolysaccharide from Leuconostoc lactis L2 and its partial characterization. Int J Biol Macromol 2020; 159:630-639. [DOI: 10.1016/j.ijbiomac.2020.05.101] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/07/2020] [Accepted: 05/14/2020] [Indexed: 11/23/2022]
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Zarandona I, Estupiñán M, Pérez C, Alonso-Sáez L, Guerrero P, de la Caba K. Chitosan Films Incorporated with Exopolysaccharides from Deep Seawater Alteromonas Sp. Mar Drugs 2020; 18:md18090447. [PMID: 32867255 PMCID: PMC7551391 DOI: 10.3390/md18090447] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/20/2020] [Accepted: 08/25/2020] [Indexed: 12/26/2022] Open
Abstract
Two Alteromonas sp. strains isolated from deep seawater were grown to promote the production of exopolysaccharides (EPS, E611 and E805), which were incorporated into chitosan solutions to develop films. The combination of the major marine polysaccharides (chitosan and the isolated bacterial EPS) resulted in the formation of homogenous, transparent, colorless films, suggesting good compatibility between the two components of the film-forming formulation. With regards to optical properties, the films showed low values of gloss, in the range of 5-10 GU, indicating the formation of non-glossy and rough surfaces. In addition to the film surface, both showed hydrophobic character, with water contact angles higher than 100 º, regardless of EPS addition. Among the two EPS under analysis, chitosan films with E805 showed better mechanical performance, leading to resistant, flexible, easy to handle films.
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Affiliation(s)
- Iratxe Zarandona
- BIOMAT research group, University of the Basque Country (UPV/EHU), Escuela de Ingeniería de Gipuzkoa, Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain;
| | - Mónica Estupiñán
- AZTI Marine Research, Basque Research and Technology Alliance (BRTA), Txatxarramendi ugartea z/g, 48395 Sukarrieta, Spain; (M.E.); (C.P.); (L.A.-S.)
| | - Carla Pérez
- AZTI Marine Research, Basque Research and Technology Alliance (BRTA), Txatxarramendi ugartea z/g, 48395 Sukarrieta, Spain; (M.E.); (C.P.); (L.A.-S.)
| | - Laura Alonso-Sáez
- AZTI Marine Research, Basque Research and Technology Alliance (BRTA), Txatxarramendi ugartea z/g, 48395 Sukarrieta, Spain; (M.E.); (C.P.); (L.A.-S.)
| | - Pedro Guerrero
- BIOMAT research group, University of the Basque Country (UPV/EHU), Escuela de Ingeniería de Gipuzkoa, Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain;
- Correspondence: (P.G.); (K.d.l.C.)
| | - Koro de la Caba
- BIOMAT research group, University of the Basque Country (UPV/EHU), Escuela de Ingeniería de Gipuzkoa, Plaza de Europa 1, 20018 Donostia-San Sebastián, Spain;
- Correspondence: (P.G.); (K.d.l.C.)
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Zhao D, Liu L, Jiang J, Guo S, Ping W, Ge J. The response surface optimization of exopolysaccharide produced by Weissella confusa XG-3 and its rheological property. Prep Biochem Biotechnol 2020; 50:1014-1022. [DOI: 10.1080/10826068.2020.1780609] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dan Zhao
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
| | - Lina Liu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
| | - Jing Jiang
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
| | - Shangxu Guo
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
| | - Wenxiang Ping
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
| | - Jingping Ge
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Harbin, Heilongjiang, P. R. China
- Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, Heilongjiang, P. R. China
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Păcularu-Burada B, Georgescu LA, Vasile MA, Rocha JM, Bahrim GE. Selection of Wild Lactic Acid Bacteria Strains as Promoters of Postbiotics in Gluten-Free Sourdoughs. Microorganisms 2020; 8:E643. [PMID: 32354104 PMCID: PMC7284720 DOI: 10.3390/microorganisms8050643] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 04/24/2020] [Accepted: 04/26/2020] [Indexed: 12/18/2022] Open
Abstract
The occurrence of inflammatory responses in humans is frequently associated with food intolerances and is likely to give rise to irritable bowel disease. The use of conventional or unconventional flours to produce gluten-free baking doughs brings important technological and nutritional challenges, and the use of the sourdough biotechnology has the potential to overcome such limitations. In addition, the typical metabolic transformations carried out by Lactic Acid Bacteria (LAB) can become an important biotechnological process for the nutritional fortification and functionalization of sourdoughs due to the resulting postbiotics. In such a context, this research work aimed at isolating and selecting new LAB strains that resort to a wide range of natural environments and food matrices to be ultimately employed as starter cultures in gluten-free sourdough fermentations. Nineteen LAB strains belonging to the genera of Lactobacillus, Leuconostoc, Pediococcus, and Streptococcus were isolated, and the selection criteria encompassed their acidification capacity in fermentations carried out on chickpea, quinoa, and buckwheat flour extracts; the capacity to produce exopolysaccharides (EPS); and the antimicrobial activity against food spoilage molds and bacteria. Moreover, the stability of the LAB metabolites after the fermentation of the gluten-free flour extracts submitted to thermal and acidic treatments was also assessed.
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Affiliation(s)
- Bogdan Păcularu-Burada
- Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, Domneasca Street No. 111, 800201 Galati, Romania; (B.P.-B.); (L.A.G.); (M.A.V.)
| | - Luminița Anca Georgescu
- Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, Domneasca Street No. 111, 800201 Galati, Romania; (B.P.-B.); (L.A.G.); (M.A.V.)
| | - Mihaela Aida Vasile
- Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, Domneasca Street No. 111, 800201 Galati, Romania; (B.P.-B.); (L.A.G.); (M.A.V.)
| | - João Miguel Rocha
- REQUIMTE–Rede de Química e Tecnologia, Laboratório de Química Verde (LAQV), Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto (FCUP), Rua do Campo Alegre, s/n. P-4169-007 Porto, Portugal;
| | - Gabriela-Elena Bahrim
- Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, Domneasca Street No. 111, 800201 Galati, Romania; (B.P.-B.); (L.A.G.); (M.A.V.)
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The anti-tumor activity of exopolysaccharides from Pseudomonas strains against HT-29 colorectal cancer cell line. Int J Biol Macromol 2020; 149:1072-1076. [PMID: 32004609 DOI: 10.1016/j.ijbiomac.2020.01.268] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 01/27/2020] [Accepted: 01/27/2020] [Indexed: 12/16/2022]
Abstract
The anti-tumor activity of extracted exopolysaccharides (EPSs) (without any side effects) of Pseudomonas aeruginosa on HT-29 colorectal cancer cell line has not been previously investigated. The extraction and partial characterization of EPS from the strains of P. aeruginosa including A (CIP A22(PTCC1310)), and B (a clinical strain) were performed. The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and sulphorhodamine B (SRB) assays as well as microscopy were used to estimate the cell viability and morphological changes in HT-29 cells subjected to EPS at 0, 7.6, 15.8, 31.2, 62.5 and 125 μg/ml. The apoptotic effects of EPS were also examined by flow cytometry. The EPSs were found to be cytotoxic against HT-29 cells with IC50 values at 44.8 (EPS-A) and 12.7 (EPS-B) μg/ml. The counteraction of 125 μg/ml of EPS-A (87.5 and 56.7%) and EPS-B (86.7 and 59.2%) resulted in the highest repressive rates using the MTT and SRB assays, respectively. Flow cytometric results showed that EPS-A and EPS-B could induce apoptosis (33% and 39%) and necrosis (65% and 59%). The extracted EPSs of both bacterial strains can be used as natural, effective, efficient and anti-cancer drugs. However, more characterization at molecular and structural levels in this respect may be required.
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Hu X, Li D, Qiao Y, Wang X, Zhang Q, Zhao W, Huang L. Purification, characterization and anticancer activities of exopolysaccharide produced by Rhodococcus erythropolis HX-2. Int J Biol Macromol 2019; 145:646-654. [PMID: 31887383 DOI: 10.1016/j.ijbiomac.2019.12.228] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/10/2019] [Accepted: 12/24/2019] [Indexed: 12/12/2022]
Abstract
In the present study, an exopolysaccharide (EPS) producer Rhodococcus erythropolis HX-2 was isolated from Xinjiang oil field, China. The HX-2 EPS (name HPS) production reached 8.957 g/L by RSM in MSM medium. The HPS was purified by ethanol precipitation and fractionation by DEAE-Cellulose and Sepharose column, the yield of HPS was 3.736 g/L. HPS composed by glucose, galactose, fucose, mannose and glucuronic acid. FT-IR spectroscopy indicated the presence of a large amount of hydroxyl groups. NMR spectroscopy indicated the existence of both α and β-configuration for sugar moieties present in HPS. The degradation temperature (255.4 °C) of the HPS was determined by thermogravimetric analysis (TGA). A reticular structure of HPS was observed by SEM and the AFM analysis of the HPS revealed straight chains line. Meanwhile, the WSI and WHC of HPS were 92.15 ± 3.05% and 189.45 ± 5.65%, respectively. Finally, In vitro anticancer activity purified EPS was evaluated on L929 normal cells, A549 cancer cells, SMMC-7721 liver cancer cells and Hela cervical cancer cell. HPS inhibited the growth of cancer cells in a certain concentration without damage to normal cells. These characteristics indicate that its potential application value in food, industry and pharmaceutical application.
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Affiliation(s)
- Xin Hu
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Dahui Li
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Yue Qiao
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Xiaohua Wang
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Qi Zhang
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Wei Zhao
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China
| | - Lei Huang
- College of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin 300384, China.
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