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Chen Z, Shen Y, Xu J. Efficient Degradation for Raffinose and Stachyose of a β-D-Fructofuranosidase and Its New Function to Improve Gel Properties of Coagulated Fermented-Soymilk. Gels 2023; 9:gels9040345. [PMID: 37102957 PMCID: PMC10137817 DOI: 10.3390/gels9040345] [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: 03/16/2023] [Revised: 04/02/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023] Open
Abstract
A novel β-D-fructofuranosidase gene was identified via database mining from Leptothrix cholodnii. The gene was chemically synthesized and expressed in Escherichia coli, resulting in the production of a highly efficient enzyme known as LcFFase1s. The enzyme exhibited optimal activity at pH 6.5 and a temperature of 50 °C while maintaining stability at pH 5.5-8.0 and a temperature below 50 °C. Furthermore, LcFFase1s exhibited remarkable resistance to commercial proteases and various metal ions that could interfere with its activity. This study also revealed a new hydrolysis function of LcFFase1s, which could completely hydrolyze 2% raffinose and stachyose within 8 h and 24 h, respectively, effectively reducing the flatulence factor in legumes. This discovery expands the potential applications of LcFFase1s. Additionally, the incorporation of LcFFase1s significantly reduced the particle size of coagulated fermented-soymilk gel, resulting in a smoother texture while maintaining the gel hardness and viscosity formed during fermentation. This represents the first report of β-D-fructofuranosidase enhancing coagulated fermented-soymilk gel properties, highlighting promising possibilities for future applications of LcFFase1s. Overall, the exceptional enzymatic properties and unique functions of LcFFase1s render it a valuable tool for numerous applications.
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Affiliation(s)
- Zhou Chen
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Yimei Shen
- School of Food and Health, Beijing Technology and Business University, Beijing 100048, China
| | - Jiangqi Xu
- School of Light Industry, Beijing Technology and Business University, Beijing 100048, China
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Hamed DA, Maghrawy HH, Abdel Kareem H. Biosynthesis of bacterial cellulose nanofibrils in black tea media by a symbiotic culture of bacteria and yeast isolated from commercial kombucha beverage. World J Microbiol Biotechnol 2023; 39:48. [PMID: 36538179 PMCID: PMC9768004 DOI: 10.1007/s11274-022-03485-0] [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: 08/23/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022]
Abstract
Bacterial cellulose has drawn the attention for its unique properties and applications including; medicine, pharmacy, food, agricultural, textile and electronics. The present study focused on the production of bacterial cellulose nanofibrils (BCNF) from black tea as cost effective alternative medium in addition to study the effect of gamma radiation on BCNF properties. A symbiotic culture of bacteria and yeast (SCOBY) were isolated from commercial Kombucha beverage and were identified as Acinetobacter lowffii and Candida krusei, respectively. The symbiotic culture was used for production of BCNF on Hestrin-Schramm (HS), black tea (BT) and modified BT media. BCNF was purified (0.5 N NaOH) and quantified by dry weight, yield and productivity determination. Characterization and effect of gamma radiation (5-25 kGy) on BCNF were studied using Scanning Electron Microscope (SEM), Fourier transform infrared (FTIR) and X-Ray Diffraction (XRD). The highest BCNF production was achieved using BT medium with 0.2% tea and 6.0% commercial sugar (with dry weight 4.77-4.61 g/l and productivity 68.14% and 65.85%, respectively). Supplementation of BT medium with 1% ethanol, 0.27% Na2HPO4 and 0.5% yeast extract individually, enhanced the BCNF production (7.85, 6.84 and 5.73 g/l), respectively. FTIR spectrum of BCNF from sugared water (SW), HS and BT showed similar structure with high purity. As a conclusion, gamma irradiation has no effect on the BCNF structure while showed different effects on its crystallinity index and size with the different doses. The changes in CrI were ranged between (17 and 23.5%), while the crystallinity size (Cs) was affected by gamma irradiation in a positive relationship where the crystalline size was decreased (33%) by exposure to 5 kGy then increased by increasing the dose of radiation reaching 25.7% at 25 kGy. SEM graphs showed the morphology of microbial culture and its symbiotic relationship in addition to the ultrafine structure of non-irradiated and irradiated BCNF.
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Affiliation(s)
- Doaa A. Hamed
- National Center for Radiation Research and Technology (NCRRT), Radiation Microbiology Department, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Heba H. Maghrawy
- National Center for Radiation Research and Technology (NCRRT), Radiation Microbiology Department, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
| | - Hussein Abdel Kareem
- National Center for Radiation Research and Technology (NCRRT), Radiation Microbiology Department, Egyptian Atomic Energy Authority (EAEA), Cairo, Egypt
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Preparation of Monascus-fermented ginkgo seeds: optimization of fermentation parameters and evaluation of bioactivity. Food Sci Biotechnol 2022; 31:721-730. [PMID: 35646409 PMCID: PMC9133274 DOI: 10.1007/s10068-022-01078-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 11/04/2022] Open
Abstract
In this study, a high monacolin K yield was achieved through solid-state fermentation of Ginkgo biloba seeds. Monascus purpureus suspension made from red yeast rice was used as spore inoculum. Fermentation conditions in solid-state fermentation were optimized using response surface methodology, and the optimal conditions for the maximum monacolin K yield (17.71 ± 1.57 mg/g) were 0.22% ammonium sulfate, 0.34% ammonium chloride, 0.05% magnesium sulfate, fermentation time of 12 days, inoculation volume of 11%, and temperature of 27 °C. The total phenolic content of Monascus-fermented ginkgo seeds attained 9.67 mg GAE/g, 4.88-fold higher than that of unfermented ginkgo seeds. The scavenging abilities of DPPH and ABTS free radicals increased to 9.79 mg TE/g and 13.92 mg TE/g, respectively. These findings highlight the importance of investigating the optimal fermentation conditions for maximum monacolin K yield and the utilization value of ginkgo seed as fermentation substrate for higher bioactivities. Supplementary Information The online version contains supplementary material available at 10.1007/s10068-022-01078-z.
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Sucrose Hydrolysis in a Continuous Packed-Bed Reactor with Auto-immobilise Aspergillus niger Biocatalyst Obtained by Solid-State Fermentation. Appl Biochem Biotechnol 2021; 194:1327-1339. [PMID: 34699041 DOI: 10.1007/s12010-021-03737-z] [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: 06/28/2021] [Accepted: 10/21/2021] [Indexed: 10/20/2022]
Abstract
Invertase from Aspergillus niger C28B25 was produced by solid-state fermentation (SSF). Fermented solids were used directly as a biocatalyst for batch and continuous hydrolysis of sucrose in a packed-bed reactor under different operational conditions with various temperatures, sucrose concentrations, and feed flow rates. The SSF allowed obtaining a biocatalyst with an invertase activity of 82.2 U/g db. The biocatalyst maintained its activity in the range of 40 to 70 °C for at least 70 h of continuous operation. In a 20-mL packed bed reactor, the highest hydrolysis rate (12.3 g/g db h) was obtained at 40 °C with 2 M sucrose. Continuous hydrolysis in 20-mL and 200-mL reactors at 60 °C led to sucrose hydrolysis above 60% (8.5 residence times) and above 55% (4.5 residence times), respectively. The auto-immobilised biocatalyst produced by SSF without recovery, purification, and immobilisation stages offers an economical alternative for developing accessible biocatalysts that can be applied in batch or continuous sucrose hydrolysis processes. This study shows the potential of biocatalyst production by SSF for other enzymatic systems.
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Doan CT, Tran TN, Nguyen TT, Tran TPH, Nguyen VB, Tran TD, Nguyen AD, Wang SL. Production of Sucrolytic Enzyme by Bacillus licheniformis by the Bioconversion of Pomelo Albedo as a Carbon Source. Polymers (Basel) 2021; 13:polym13121959. [PMID: 34199171 PMCID: PMC8231626 DOI: 10.3390/polym13121959] [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: 05/14/2021] [Revised: 06/10/2021] [Accepted: 06/10/2021] [Indexed: 11/30/2022] Open
Abstract
Recently, there has been increasing use of agro-byproducts in microbial fermentation to produce a variety of value-added products. In this study, among various kinds of agro-byproducts, pomelo albedo powder (PAP) was found to be the most effective carbon source for the production of sucrose hydrolyzing enzyme by Bacillus licheniformis TKU004. The optimal medium for sucrolytic enzyme production contained 2% PAP, 0.75% NH4NO3, 0.05% MgSO4, and 0.05% NaH2PO4 and the optimal culture conditions were pH 6.7, 35 °C, 150 rpm, and 24 h. Accordingly, the highest sucrolytic activity was 1.87 U/mL, 4.79-fold higher than that from standard conditions using sucrose as the carbon source. The purified sucrolytic enzyme (sleTKU004) is a 53 kDa monomeric protein and belongs to the glycoside hydrolase family 68. The optimum temperature and pH of sleTKU004 were 50 °C, and pH = 6, respectively. SleTKU004 could hydrolyze sucrose, raffinose, and stachyose by attacking the glycoside linkage between glucose and fructose molecules of the sucrose unit. The Km and Vmax of sleTKU004 were 1.16 M and 5.99 µmol/min, respectively. Finally, sleTKU004 showed strong sucrose tolerance and presented the highest hydrolytic activity at the sucrose concentration of 1.2 M–1.5 M.
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Affiliation(s)
- Chien Thang Doan
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Ngoc Tran
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Thanh Nguyen
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Thi Phuong Hanh Tran
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Van Bon Nguyen
- Institute of Biotechnology and Environment, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (V.B.N.); (A.D.N.)
| | - Trung Dung Tran
- Faculty of Natural Sciences and Technology, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (T.T.N.); (T.P.H.T.); (T.D.T.)
| | - Anh Dzung Nguyen
- Institute of Biotechnology and Environment, Tay Nguyen University, Buon Ma Thuot 630000, Vietnam; (V.B.N.); (A.D.N.)
| | - San-Lang Wang
- Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan; (C.T.D.); (T.N.T.)
- Life Science Development Center, Tamkang University, New Taipei City 25137, Taiwan
- Correspondence: ; Tel.: +886-2-2621-5656; Fax: +886-2-2620-9924
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Mohkam M, Taleban Y, Golkar N, Berenjian A, Dehshahri A, Mobasher MA, Ghasemi Y. Isolation and identification of novel l-Methioninase producing bacteria and optimization of its production by experimental design method. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Optimization of culture medium for improved production of antimicrobial compounds by Amycolatopsis sp. -AS9 isolated from vermicasts. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lincoln L, More SS, Reddy SV. Purification and biochemical characterization of β-d-fructofuranosidase fromBacillussubtilisLYN12. J Food Biochem 2018. [DOI: 10.1111/jfbc.12592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Lynette Lincoln
- Department of Biochemistry, Centre for Post Graduate Studies; Jain University; Bangalore India
| | - Sunil S. More
- School of Basic and Applied Sciences; Dayananda Sagar University; Bangalore India
| | - Shwetha V. Reddy
- School of Basic and Applied Sciences; Dayananda Sagar University; Bangalore India
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Streptomyces thermoviolaceus SRC3 strain as a novel source of the antibiotic adjuvant streptazolin: A statistical approach toward the optimized production. J Microbiol Methods 2018; 148:161-168. [PMID: 29665368 DOI: 10.1016/j.mimet.2018.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/05/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
Abstract
Streptomyces thermoviolaceus SRC3, a newly isolated actinobacterial strain from Algerian river sediments, exhibited a broad activity against various bacterial and yeast human pathogens (Salmonella Typhi ATCC 14028, Vibrio cholerae ATCC 14035, MRSA ATCC 43300 and Candida albicans ATCC 10231). The strain SRC3 was selected from thirty nine actinobacterial isolates and identified as S. thermoviolaceus based on morphology, cultural properties, physiological analyses and 16S rRNA gene sequencing. Culture parameters for the antibiotic production were optimized by sequential statistical strategy including Plackett-Burman design (PBD) and Response Surface Methodology (RSM). In PBD experiments, KCl, K2HPO4, MgSO4·7H2O, pH value and incubation time emerged as the most significant in affecting the output of antimicrobial activities. These factors were further optimized using Central Composite Design (CCD). The best achieved conditions were: KCl (0.01%), K2HPO4 (0.1%), MgSO4·7H2O (0.02%) and 9 days incubation for anti-S. Typhi compounds, KCl (0.051%), MgSO4·7H2O (0.05%) and 5 days incubation for C. albicans inhibitors. The metabolite responsible for the bioactivities was purified, structurally characterized (by NMR, MS, UV and IR analyses) and identified as streptazolin, recently reported as a promising antibiotic adjuvant.
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Invertase of Saccharomyces cerevisiae SAA-612: Production, characterization and application in synthesis of fructo-oligosaccharides. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.11.034] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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11
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Cloning, Characterization and Bioinformatics Analysis of Novel Cytosine Deaminase from Escherichia coli AGH09. Int J Pept Res Ther 2015. [DOI: 10.1007/s10989-015-9465-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Banihashemi M, Mohkam M, Safari A, Nezafat N, Negahdaripour M, Mohammadi F, Kianpour S, Ghasemi Y. Optimization of Three Dimensional Culturing of the HepG2 Cell Line in Fibrin Scaffold. HEPATITIS MONTHLY 2015; 15:e22731. [PMID: 25861316 PMCID: PMC4385269 DOI: 10.5812/hepatmon.22731] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 11/12/2014] [Accepted: 02/22/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND A potential treatment for healing hepatic tissue is delivering isolated hepatic cells to the site of injury to promote hepatic cells formation. In this technology, providing an appropriate injectable system for delivery of hepatic cells is an important issue. In this regard, fibrin scaffolds were designed with many advantages over other scaffolds like cell delivery vehicles for biodegradation, biocompatibility and hemostasis. OBJECTIVES The aim of this study was to determine suitable cell culture circumstances for HepG2 cell proliferation and differentiation in 3D fibrin scaffolds by evaluating Ca(2+) concentrations, cell numbers, various ratios of plasma/RPMI 1640 and thickness of fibrin scaffold. MATERIALS AND METHODS In a one-stage experimental design, Box-Behnken design strategy was performed by Minitab 15 software (version 15, Minitab. State College, PA) with three factors at three levels (low, medium and high) and 27 runs for identification of the effects of ratio of plasma/RPMI 1640, Ca(2+) concentration and thickness on the formation of fibrin gel scaffold and 3D HepG2 culture. RESULTS The optimal concentrations for fibrin scaffold fabrication were achieved by adding 0.15 mol CaCl2 (50 µL) and 1 × 10(5) cells to 1:4 of plasma/RPMI 1640 ratio (500 µL with 2.3 mm thickness per well). CONCLUSIONS Our approach provided easy handle method using inexpensive materials like human plasma instead of purified fibrinogen to fabricate fibrin scaffold.
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Affiliation(s)
- Mehrzad Banihashemi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Milad Mohkam
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Azam Safari
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Navid Nezafat
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Manica Negahdaripour
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Fatemeh Mohammadi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Sedigheh Kianpour
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
| | - Younes Ghasemi
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, IR Iran
- Corresponding Author: Younes Ghasemi, Department of Pharmaceutical Biotechnology, School of Pharmacy, Shiraz University of Medical Sciences, P. O. Box: 71345-1583, Shiraz, IR Iran. Tel: +98-7112426729, E-mail:
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Moradpour Z, Ghasemian A, Safari A, Mohkam M, Ghasemi Y. Isolation, molecular identification and statistical optimization of culture condition for a new extracellular cholesterol oxidase-producing strain using response surface methodology. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0547-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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