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Du Y, Liu L, Yan W, Li Y, Li Y, Cui K, Yu P, Gu Z, Zhang W, Feng J, Li Z, Tang H, Du Y, Zhao H. The anticancer mechanisms of exopolysaccharide from Weissella cibaria D-2 on colorectal cancer via apoptosis induction. Sci Rep 2023; 13:21117. [PMID: 38036594 PMCID: PMC10689803 DOI: 10.1038/s41598-023-47943-7] [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: 09/11/2023] [Accepted: 11/20/2023] [Indexed: 12/02/2023] Open
Abstract
Exopolysaccharide (EPS) from Weissella cibaria has been devoted to the study of food industry. However, the anticancer activity of W. cibaria derived EPS has not yet been investigated. In this study, we obtained the EPS from W. cibaria D-2 isolated from the feces of healthy infants and found that D-2-EPS, a homopolysaccharide with porous web like structure, could effectively inhibit the proliferation, migration, invasion and induce cell cycle arrest in G0/G1 phase of colorectal cancer (CRC) cells. In HT-29 tumor xenografts, D-2-EPS significantly retarded tumor growth without obvious cytotoxicity to normal organs. Furthermore, we revealed that D-2-EPS promoted the apoptosis of CRC cells by increasing the levels of Fas, FasL and activating Caspase-8/Caspase-3, indicating that D-2-EPS might induce apoptosis through the extrinsic Fas/FasL pathway. Taken together, the D-2-EPS has the potential to be developed as a nutraceutical or drug to prevent and treat colorectal cancer.
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Affiliation(s)
- Yurong Du
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China
| | - Lei Liu
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China
| | - Weiliang Yan
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China
| | - Yang Li
- International Institutes of Medicine, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, Zhejiang, China
| | - Yuanzhe Li
- Department of Pediatrics, Children's Hospital Affiliated of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Kang Cui
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China
| | - Pu Yu
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China
| | - Zhuoyu Gu
- Department of Thoracic Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - WanCun Zhang
- Department of Pediatrics, Children's Hospital Affiliated of Zhengzhou University, Zhengzhou, 450052, Henan, China
| | - Jianguo Feng
- Department of Anesthesiology, The Affiliated Hospital of Southwest Medical University, Luzhou, 646000, Sichuan, China
| | - Zhen Li
- National Health Commission Key Laboratory of Cardiovascular Regenerative Medicine, Heart Center of Henan Provincial People's Hospital, Central China Fuwai Hospital of Zhengzhou University, Zhengzhou, 451464, Henan, China
| | - Hao Tang
- National Health Commission Key Laboratory of Cardiovascular Regenerative Medicine, Heart Center of Henan Provincial People's Hospital, Central China Fuwai Hospital of Zhengzhou University, Zhengzhou, 451464, Henan, China
| | - Yabing Du
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China.
| | - Huan Zhao
- Oncology Department, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou, 450052, Henan, China.
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Goyal D, Ahmad S, Mahmood A, Chander Sharma S. Interactions of dextransucrase purified from Streptococcus mutans 890 with plant polyphenols. Biochem Biophys Rep 2021; 26:100980. [PMID: 33748439 PMCID: PMC7967010 DOI: 10.1016/j.bbrep.2021.100980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/03/2021] [Accepted: 03/03/2021] [Indexed: 12/02/2022] Open
Abstract
Plant polyphenols have been extensively studied for their chemopreventive properties for human health. Dextransucrase plays an essential role in synthesizing exopolysaccharides from its exclusive substrate sucrose in Streptococcus mutans. In the present study, the effect of polyphenols gallic acid and tannic acid was investigated on the dextransucrase activity. The enzyme was purified by ethanol precipitation followed by column chromatography by Sephadex G-200 gel chromatography, followed by PEG-400 treatment. The purified enzyme exhibited 52 fold enrichment with 17.5% yield and specific activity of 3.54 Units/mg protein. On SDS-PAGE enzyme protein gave a single band with a molecular weight of 160 kDa. Dextransucrase activity was inhibited 80–90% by 0.04 mM tannic acid (TA) or 0.4 mM gallic acid (GA) suggesting that tannic acid has 10- fold more inhibitory potential than gallic acid on the activity of dextransucrase. CD/ORD studies revealed modifications in the tertiary structure of enzyme protein in presence of tannic acid and gallic acid, which were further confirmed by fluorescence spectra of the protein in presence of tannic acid. These results suggest that inhibition of dextransucrase activity in S. mutans by polyphenols may have potential applications in the prevention and control of dental caries. Dextransuccrase an important enzyme of S. mutans is involved in the metabolism of sucrose. Purified enzyme is inhibited (80-90%) by plant polyphenols. Observed inhibition is due to change in teritary structure. S. mutans is an important cariogenic agent. Plant polyphenols are good anticariogenic agents.
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Affiliation(s)
- Dimple Goyal
- Department of Biochemistry, Panjab University, Chandigarh, India
| | - Shabeer Ahmad
- Department of Biochemistry, Panjab University, Chandigarh, India
| | - Akhtar Mahmood
- Department of Biochemistry, Panjab University, Chandigarh, India
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Zhao B, Du R, Wang J, Xu M, Han Y, Han X, Zhou Z. Purification and biochemical characterization of a novel glucansucrase from Leuconostoc citreum B-2. Biotechnol Lett 2020; 42:1535-1545. [DOI: 10.1007/s10529-020-02881-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/31/2020] [Indexed: 01/02/2023]
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4
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Xu W, Peng J, Zhang W, Zhang T, Guang C, Mu W. Enhancement of the Brenneria sp. levansucrase thermostability by site-directed mutagenesis at Glu404 located at the “-TEAP-” residue motif. J Biotechnol 2019; 290:1-9. [DOI: 10.1016/j.jbiotec.2018.11.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/17/2018] [Accepted: 11/26/2018] [Indexed: 01/15/2023]
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5
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Flórez Guzman GY, Hurtado GB, Ospina SA. New dextransucrase purification process of the enzyme produced by Leuconostoc mesenteroides IBUN 91.2.98 based on binding product and dextranase hydrolysis. J Biotechnol 2018; 265:8-14. [DOI: 10.1016/j.jbiotec.2017.10.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 10/24/2017] [Accepted: 10/30/2017] [Indexed: 11/25/2022]
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Wang Y, Xu W, Bai Y, Zhang T, Jiang B, Mu W. Identification of an α-(1,4)-Glucan-Synthesizing Amylosucrase from Cellulomonas carboniz T26. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:2110-2119. [PMID: 28240031 DOI: 10.1021/acs.jafc.6b05667] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Amylosucrase, catalyzing the synthesis of α-(1,4)-glucan from sucrose, has been widely studied and used in carbohydrate biotransformation because of its versatile activities. In this study, a novel amylosucrase was characterized from Cellulomonas carboniz T26. The recombinant enzyme was overexpressed in Escherchia coli and purified by nickel affinity chromatography. It was determined to be a monomeric protein with a molecular mass of 72 kDa. The optimum pH and temperature for transglucosylation were measured to be pH 7.0 and 40 °C. The transglucosylation activity was significantly higher than the hydrolytic activity. The main product generated from sucrose was structurally determined to be α-(1,4)-glucan. A small amount of glucose was produced by hydrolysis, and sucrose isomers including turanose and trehalulose were generated as minor products. The ratio of hydrolytic, polymerization, and isomerization reactions was calculated to be 5.8:84.0:10.2. The enzyme favored production of long-chain insoluble α-glucan at lower temperature.
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Affiliation(s)
- Yongchun Wang
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
| | - Yuxiang Bai
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
| | - Bo Jiang
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology and ‡Ministry of Education, Key Laboratory of Carbohydrate Chemistry and Biotechnology, Jiangnan University , Wuxi, 214122, Jiangsu China
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Sharma M, Patel SN, Lata K, Singh U, Krishania M, Sangwan RS, Singh SP. A novel approach of integrated bioprocessing of cane molasses for production of prebiotic and functional bioproducts. BIORESOURCE TECHNOLOGY 2016; 219:311-318. [PMID: 27498012 DOI: 10.1016/j.biortech.2016.07.131] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 06/06/2023]
Abstract
In this work, the sugar industry by-product cane molasses was investigated as feedstock for acceptor reactions by dextransucrase from Leuconostoc mesenteroides MTCC 10508, leading to the biosynthesis of oligosaccharides. The starch industry corn fiber residue was used as a source for acceptor molecules, maltose, in the reaction. Production of approximately 124g oligosaccharides (DP3-DP6) per kg of fresh molasses was achieved. Further, cane molasses based medium was demonstrated as a sole carbon source for L. mesenteroides growth and dextransucrase production. d-Fructose released by dextransucrase activity as processing by-product was transformed into the functional monosaccharide with zero caloric value, d-psicose, by inducing its epimerization. Quantitative analysis approximated 37g d-psicose per kg of fresh molasses. Thus, the study established a novel approach of integrated bioprocessing of cane molasses into prebiotic and functional food additives.
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Affiliation(s)
- Manisha Sharma
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Satya Narayan Patel
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Kusum Lata
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Umesh Singh
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Meena Krishania
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Rajender S Sangwan
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India
| | - Sudhir P Singh
- Center of Innovative and Applied Bioprocessing (CIAB), Department of Biotechnology (DBT), Mohali, India.
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Song L, Miao M, Jiang B, Xu T, Cui SW, Zhang T. Leuconostoc citreum SK24.002 glucansucrase: Biochemical characterisation and de novo synthesis of α-glucan. Int J Biol Macromol 2016; 91:123-31. [DOI: 10.1016/j.ijbiomac.2016.05.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 03/28/2016] [Accepted: 05/04/2016] [Indexed: 12/29/2022]
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Kothari D, Goyal A. Gentio-oligosaccharides from Leuconostoc mesenteroides NRRL B-1426 dextransucrase as prebiotics and as a supplement for functional foods with anti-cancer properties. Food Funct 2016; 6:604-11. [PMID: 25524369 DOI: 10.1039/c4fo00802b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gentio-oligosaccharides (GnOS) were synthesized by the acceptor reaction of dextransucrase from Leuconostoc mesenteroides NRRL B-1426 with gentiobiose and sucrose. GnOS were purified by gel permeation chromatography using a Bio-Gel P-2 column and identified by mass spectrometry. The purified GnOS (degree of polymerization ≥3) were investigated for their in vitro prebiotic and cytotoxic activity. GnOS exhibited a significantly lower degree of digestibility of 18.1% by simulated human gastric juice (pH 1.0) and 7.1% by human α-amylase (pH 7.0) after 6 h, whereas inulin, a standard prebiotic, showed 39.7% and 12.8% of digestibility, respectively. The prebiotic score showed that GnOS significantly supported the growth of probiotics such as Bifidobacterium infantis and Lactobacillus acidophilus and was comparable to that of inulin. The selective inhibitory effect of GnOS on human colon carcinoma (HT-29) cells revealed its potential as an anti-cancer agent that can serve as a functional food additive for the benefit of human health.
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Affiliation(s)
- Damini Kothari
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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Kothari D, Goyal A. Enzyme-resistant isomalto-oligosaccharides produced fromLeuconostoc mesenteroidesNRRL B-1426 dextran hydrolysis for functional food application. Biotechnol Appl Biochem 2015; 63:581-9. [DOI: 10.1002/bab.1391] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/30/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Damini Kothari
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam India
| | - Arun Goyal
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati Assam India
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Baruah R, Goyal A. Hyper glucansucrase, glucan and oligosaccharide producing novel Weissella cibaria RBA12 isolated from Pummelo (Citrus maxima). ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1072-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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12
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Shukla R, Iliev I, Goyal A. Purification and Characterization of Dextransucrase fromLeuconostoc MesenteroidesNRRL B-1149. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2010.10817900] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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13
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Vasileva T, Kirilov A, Bivolarski V, Bounaix MS, Gabriel V, Robert H, Fontagne-Faucher C, Gabriel B, Ivanova I, Iliev I. Characterization of Glycansucrase Activities fromLeuconostoc MesenteroidesLM17 and URE 13 Strains. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2009.10818520] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Das D, Goyal A. Characterization and biocompatibility of glucan: a safe food additive from probiotic Lactobacillus plantarum DM5. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:683-690. [PMID: 23852706 DOI: 10.1002/jsfa.6305] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Revised: 07/06/2013] [Accepted: 07/13/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Exopolysaccharide produced by lactic acid bacteria are the subject of an increasing number of studies for their potential applications in the food industry as stabilizing, bio-thickening and immunostimulating agents. In this regard, the authors isolated an exopolysaccharide producing probiotic lactic acid bacterium from fermented beverage Marcha of north eastern Himalayas. RESULTS The isolate Lactobacillus plantarum DM5 showed extracellular glucansucrase activity of 0.48 U mg⁻¹ by synthesizing natural exopolysaccharide glucan (1.87 mg mL⁻¹) from sucrose. Zymogram analysis of purified enzyme confirms the presence of glucosyltransferase of approximately 148 kDa with optimal activity of 18.7 U mg⁻¹ at 30 °C and pH 5.4. The exopolysaccharide was purified by gel permeation chromatography and had an average molecular weight of 1.11 × 10⁶ Da. Acid hydrolysis and structural characterization of exopolysaccharide revealed that it was composed of d-glucose residues, containing 86.5% of α-(1→6) and 13.5% of α-(1→3) linkages. Rheological study exhibited a shear thinning effect of glucan appropriate for food additives. A cytotoxicity test of glucan on human embryonic kidney 293 (HEK 293) and human cervical cancer (HeLa) cell lines revealed its nontoxic biocompatible nature. CONCLUSION This is the first report on the structure and biocompatibility of homopolysaccharide α-D-glucan (dextran) from probiotic Lactobacillus plantarum strain and its unique physical and rheological properties that facilitate its application in the food industry as viscosifying and gelling agent.
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Affiliation(s)
- Deeplina Das
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039, India
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15
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Isolation, purification and functional characterization of glucansucrase from probiotic Lactobacillus plantarum DM5. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0815-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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16
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Shukla S, Shi Q, Maina NH, Juvonen M, Maijatenkanen, Goyal A. Weissella confusa Cab3 dextransucrase: properties and in vitro synthesis of dextran and glucooligosaccharides. Carbohydr Polym 2013; 101:554-64. [PMID: 24299811 DOI: 10.1016/j.carbpol.2013.09.087] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 09/20/2013] [Accepted: 09/25/2013] [Indexed: 01/14/2023]
Abstract
Food-derived Weissella spp. have gained attention during recent years as efficient dextran producers. Weissella confusa Cab3 dextransucrase (WcCab3-DSR) was isolated applying PEG fractionation and used for in vitro synthesis of dextran and glucooligosaccharides. WcCab3-DSR had a molar mass of 178 kDa and was activated by Co(2+) and Ca(2+) ions. Glycerol and Tween 80 enhanced enzyme stability, and its half-life at 30°C increased from 10h to 74 h and 59 h, respectively. The (1)H and (13)C NMR spectral analysis of the produced dextran confirmed the presence of main chain α-(1→6) linkages with only 3.0% of α-(1→3) branching, of which some were elongated. An HPSEC analysis in DMSO revealed a high molecular weight of 1.8 × 10(7)g/mol. Glucooligosaccarides produced through the acceptor reaction with maltose, were analyzed with HPAEC-PAD and ESI-MS/MS. They were a homologous series of isomaltooligosaccharides with reducing end maltose units. To the best of our knowledge, this is a first report on native W. confusa dextransucrase.
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Affiliation(s)
- Shraddha Shukla
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
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Qader SAU, Aman A. Low molecular weight dextran: Immobilization of cells of Leuconostoc mesenteroides KIBGE HA1 on calcium alginate beads. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.11.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Dextransucrase from the mutant of Pediococcus pentosaceus (PPm) is more stable than the wild type. 3 Biotech 2011; 1:199-205. [PMID: 22558538 PMCID: PMC3339597 DOI: 10.1007/s13205-011-0018-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 07/13/2011] [Indexed: 10/29/2022] Open
Abstract
A comparative study on both wild type and mutant of Pediococcus pentosaceus for dextransucrase activity, its stability, dextran synthesizing activity, antibiotic sensitivity and carbohydrate utilization was performed. The wild type P. pentosaceus had specific activity of 0.58 U/mg whereas the mutant showed that of 1.0 U/mg with 72% enhancement. The antibiogram of 27 antibiotics tested against mutant showed significant differences with 9 antibiotics when compared to wild type. In carbohydrate fermentation profile, trehalose, galactose, maltose, lactose and fructose are metabolized by both the strains, but weakly in case of mutant. Stabilization of purified dextransucrase from wild type and mutant with various stabilizers was studied at 30 and 4 °C. Both enzymes were more stable at 4 °C. Among various stabilizers such as dextran (100 kDa, 10 μg/ml), glycerol (0.5%, v/v), PEG 8000 (10 μg/ml) and Tween 80 (0.5%, v/v), Tween 80 provided maximum stabilization at 4 and 30 °C. The mutant showed better stabilization than that of the wild type at both 30 and 4 °C. The loss of activity at 30 °C after 24 h in wild type and mutant in the presence of Tween 80 was only 34 and 32%, respectively, whereas the loss of activity in control of wild type and mutant was 76 and 59%, respectively. After 15 days at 4 °C, the loss of activity in control of wild type and mutant in the presence of Tween 80 was only 15 and 8%, respectively, whereas at 30 °C, the loss of activity in control of wild type and mutant was 49 and 42% respectively. Half-life of the enzyme with Tween 80 was 28.5 and 33.5 h for wild type and mutant, respectively, at 30 °C and 52.1 and 106.6 days for wild type and mutant respectively, at 4 °C.
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Purification and characterization of levansucrases from Bacillus amyloliquefaciens in intra- and extracellular forms useful for the synthesis of levan and fructooligosaccharides. Biosci Biotechnol Biochem 2011; 75:1929-38. [PMID: 21979064 DOI: 10.1271/bbb.110315] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The intra- and extracellular levansucrase (LS) activities produced by Bacillus amyloliquefaciens were promoted by supplementing the sucrose medium with yeast and peptone as nitrogen sources. These activities were purified by polyethylene glycol (PEG) fractionation for the first time. PEGs of low molecular weight selectively fractionated the intracellular LS activity rather than the extracellular LS activity. Contrary to other LSs, B. amyloliquefaciens LSs exhibited high levan-forming activity over a wide range of sucrose concentrations. The optimum temperatures for the intra- (25-30 °C) and extracellular (40 °C) LS transfructosylation activities were lower than those for the hydrolytic activities (45-50 °C; 50 °C). In addition, the catalytic efficiency for the transfructosylation activity of intracellular LS was higher than that of extracellular LS. These differences between intra- and extracellular LSs reveal the occurrence of certain conformational changes to LS upon protein secretion and/or purification. This study is the first to highlight that B. amyloliquefaciens LSs synthesized a variety of FOSs from various saccharides, with lactose and maltose being the best fructosyl acceptors.
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Purama RK, Agrawal M, Goyal A. Stabilization of dextransucrase from Leuconostoc mesenteroides NRRL B-640. Indian J Microbiol 2010; 50:57-61. [PMID: 22815573 DOI: 10.1007/s12088-010-0057-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Accepted: 05/13/2008] [Indexed: 11/30/2022] Open
Abstract
Stabilization of dextransucrase from Leuconostoc mesenteroides NRRL B-640 with various stabilizers at different temperatures was studied. Dextransucrase was stable at lower temperatures (10-30°C) and lost the activity at above 30°C. The salts such as CaCl(2), CoCl(2) and MgCl(2) enhanced the dextransucrase activity. A 22% higher dextransucrase activity was obtained by 4 mM CoCl(2). The dextransucrase activity was lost by 50% at 1 mM EDTA. Urea denatured the enzyme and caused 45%, 90% and 98% loss of activity in 30 min when treated with 1 M, 3 M, and 5 M urea concentrations, respectively. Amongst the stabilizers Tween 80, glycerol, PEG-8000, dextran (500 kDa) and glutaraldehyde, Tween 80 provided the maximum stability at 30°C. In the presence of Tween 80 the enzyme lost only 8% activity at 30°C in 20 h but, it lost 65% of activity with out any stabilizer. The enzyme lost 92% of activity with in 4 days at 30°C and lost only 25% of activity at -20°C after 14 days.
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Affiliation(s)
- Ravi Kiran Purama
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039 Assam India
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21
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Patel S, Kasoju N, Bora U, Goyal A. Structural analysis and biomedical applications of dextran produced by a new isolate Pediococcus pentosaceus screened from biodiversity hot spot Assam. BIORESOURCE TECHNOLOGY 2010; 101:6852-6855. [PMID: 20444595 DOI: 10.1016/j.biortech.2010.03.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Revised: 03/12/2010] [Accepted: 03/15/2010] [Indexed: 05/29/2023]
Abstract
Dextran produced by a natural isolate of Pediococcus pentosaceus, screened from Assam, in the Northeastern region of India, was estimated, purified, structure characterised and functionality analysed. The dextran concentration in the cell free supernatant of the isolate P. pentosaceus was 10.2mg/ml. FT-IR analysis revealed the hydroxyl and carboxyl functional groups present in the dextran. (1)H NMR and (13)C NMR spectral data revealed that the dextran has a linear backbone of alpha-(1-->6) linked D-glucose residues. The decrease in viscosity of dextran solution with the increase in shear rate, threw light on its typical non-Newtonian pseudoplastic behaviour. The cytotoxicity tests on human cervical cancer (HeLa) cell line was studied which showed the dextran is non-toxic and biocompatible, rendering it safe for drug delivery, tissue engineering and various other biomedical applications.
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Affiliation(s)
- Seema Patel
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
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22
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Yamaner CI, Sezen IY, Tanriseven A. Selection of psychrotrophic Leuconostoc spp. from native fruits, and studies on their dextransucrases. Food Sci Biotechnol 2010. [DOI: 10.1007/s10068-010-0024-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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23
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Vasileva T, Ivanova I, Iliev I. Purification and Characterization of Glucosyltransferases from New Strains Leuconostoc Mesenteroides. BIOTECHNOL BIOTEC EQ 2009. [DOI: 10.1080/13102818.2009.10818519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Sarwat F, Ul Qader SA, Aman A, Ahmed N. Production & characterization of a unique dextran from an indigenous Leuconostoc mesenteroides CMG713. Int J Biol Sci 2008; 4:379-86. [PMID: 18953402 PMCID: PMC2567811 DOI: 10.7150/ijbs.4.379] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 07/14/2008] [Indexed: 11/25/2022] Open
Abstract
On the basis of high enzyme activity a newly isolated strain of L. mesenteroides CMG713 was selected for dextran production. For maximum yield of dextran, effects of various parameters such as pH, temperature, sucrose concentration and incubation period were studied. L. mesenteroides CMG713 produced maximum dextran after 20 hours of incubation at 30ºC with 15% sucrose at pH 7.0. The molecular mass distribution of dextran produced by this strain showed that its molecular mass was about 2.0 million Da. Dextran analysis by 13C-NMR spectrometry showed no signals corresponding to any other linkages except α-(1→6) glycosidic linkage in the main chain, which has not been reported before. Physico-chemical properties of this unique dextran were also studied. These optimised conditions could be used for the commercial production of this unique high molecular weight dextran, which have significant industrial perspectives.
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Affiliation(s)
- Farwa Sarwat
- Centre for Molecular Genetics, University of Karachi, Pakistan
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25
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Purama RK, Goyal A. Screening and optimization of nutritional factors for higher dextransucrase production by Leuconostocmesenteroides NRRL B-640 using statistical approach. BIORESOURCE TECHNOLOGY 2008; 99:7108-7114. [PMID: 18313291 DOI: 10.1016/j.biortech.2008.01.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Revised: 12/23/2007] [Accepted: 01/03/2008] [Indexed: 05/26/2023]
Abstract
To improve dextransucrase production from Leuconostocmesenteroides NRRL B-640 culture medium was screened and optimized using the statistical design techniques of Plackett-Burman and response surface methodology (RSM). Plackett-Burman design with six variables viz. sucrose, yeast extract, K2HPO4, peptone, beef extract and Tween 80 was performed to screen the nutrients that were significantly affecting dextransucrase production. The variables sucrose, K2HPO4, yeast extract and beef extract showed above 90% confidence levels for dextransucrase production and were considered as significant factors for optimization using response surface methodology. 2(4)-central composite design was used for RSM optimization. The experimental results were fitted to a second-order polynomial model which gave a coefficient of determination R2=0.95. The optimized composition of 30g/l sucrose, 18.9g/l yeast extract, 19.4g/l K2HPO4 and 15g/l beef extract gave an experimental value of dextransucrase activity of 10.7U/ml which corresponded well with the predicted value of 10.9U/ml by the model.
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Affiliation(s)
- Ravi Kiran Purama
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
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26
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Application of response surface methodology for maximizing dextransucrase production from Leuconostoc mesenteroides NRRL B-640 in a bioreactor. Appl Biochem Biotechnol 2008; 151:182-92. [PMID: 18975146 DOI: 10.1007/s12010-008-8165-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Accepted: 01/28/2008] [Indexed: 10/22/2022]
Abstract
The production of dextransucrase from Leuconostoc mesenteroides NRRL B-640 was investigated using statistical approaches. Plackett-Burman design with six variables, viz. sucrose, yeast extract, K(2)HPO(4), peptone, beef extract, and Tween 80, was used to screen the nutrients that significantly affected the dextransucrase production. 2(4)-Central composite design with four selected variables (sucrose, K(2)HPO(4), yeast extract, and beef extract) was used for response surface methodology (RSM) for optimizing the enzyme production. The culture was grown under flask culture with 100 ml optimized medium containing 30 g/l sucrose, 18.5 g/l yeast extract, 15.3 g/l K(2)HPO(4), and 5 g/l beef extract at 25 degrees C and shaking at 200 rpm gave dextransucrase with specific activity of 0.68 U/mg. Whereas the same optimized medium in a 3.0-l bioreactor (1.4 l working volume) gave an experimentally determined value of specific activity of 0.70 U/mg, which was in perfect agreement with the predicted value of 0.65 U/mg by the statistical model.
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27
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Majumder A, Purama RK, Goyal A. An overview of purification methods of glycoside hydrolase family 70 dextransucrase. Indian J Microbiol 2007; 47:197-206. [PMID: 23100667 DOI: 10.1007/s12088-007-0040-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2006] [Revised: 03/26/2007] [Accepted: 07/14/2007] [Indexed: 11/30/2022] Open
Abstract
The enzyme dextransucrase (sucrose:1, 6-α-D-glucan 6-α-glucosyltransferase, EC 2.4.1.5) catalyses the synthesis of exopolysaccharide, dextran from sucrose. This class of polysaccharide has been extensively exploited in pharmaceutical industry as blood volume expander, as stabiliser in food industry and as a chromatographic medium in fine chemical industry because of their nonionic nature and stability. Majority of the dextrans are synthesized from sucrose by dextransucrase secreted mainly by bacteria belonging to genera Leuconostoc, Streptococcus and Lactobacillus. Bulk of the information on purification of extracellular dextransucrase has been generated from Leuconostoc species. Various methods such as precipitation by ammonium sulphate, ethanol or polyethylene glycol, phase partitioning, ultrafiltration and chromatography have been used to purify the enzyme. Purification of dextransucrase is rendered difficult by the presence of viscous dextran in the medium. However, processes like ultra-filtration, salt and PEG precipitation, chromatography and phase partitioning have been standardized and successfully used for higher scale purification of the enzyme. A recombinant dextransucrase from Leuconostoc mesenteroides B-512F with a histidine tag has been expressed in E. coli cells and purifi ed by immobilized metal ion chromatography. This review reports the available information on purifi cation methods of dextransucrase from Leuconostoc mesenteroides strains.
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Affiliation(s)
- Avishek Majumder
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, 781 039 Assam India
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