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Wang C, Li Q, Qiu D, Guo Y, Ding X, Jiang K. An efficient and environmentally-friendly extraction, characterization and activity prediction of polysaccharides from Rhizoma et Radix Notopterygii. Int J Biol Macromol 2024; 265:130907. [PMID: 38492707 DOI: 10.1016/j.ijbiomac.2024.130907] [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: 10/18/2023] [Revised: 02/29/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
Traditional hot water reflux extraction, ultrasonic-water extraction (UW), ultrasonic-natural deep eutectic solvent (NADES) extraction (U-NADES), ultrasonic-water and enzyme extraction (U-W-E) and ultrasonic-NADES and enzyme extraction (U-NADES-E) are employed for the extraction of Rhizoma et Radix Notopterygii polysaccharides (RNP), in which, the U-NADES-E has being proved as the most effective method. Response Surface Methodology (RSM) was utilized to optimize the conditions for U-NADES-E method. Using the optimal extraction conditions, the yield of RNP can be enhanced by nearly two-fold in comparison to the traditional extraction method, achieving a yield of 7.38 %, with a mere 30-min treatment and low ultrasonic power at 240 W. The RNP's composition included Rhamnose, Arabinose, Galactose, Glucose and Galacturonic Acid by high-performance anion-exchange chromatography. The polysaccharides from two different species of Rhizoma et Radix Notopterygii have also been characterized and identified. Network pharmacology and molecular docking predict that RNP may exert its effects in vivo through binding to PPARA, ACE and REN proteins, thereby potentially impacting diabetes outcomes. This study proposes a new, efficient, energy-saving and environmentally-friendly method for the extraction of RNP.
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Affiliation(s)
- Chenyue Wang
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Qian Li
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China.
| | - Daiyu Qiu
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Yehong Guo
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Xiaoqin Ding
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
| | - Kan Jiang
- State Key Laboratory of Aridland Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China
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Polo-Castellano C, Mateos RM, Visiedo F, Palma M, Barbero GF, Ferreiro-González M. Optimizing an Enzymatic Extraction Method for the Flavonoids in Moringa ( Moringa oleifera Lam.) Leaves Based on Experimental Designs Methodologies. Antioxidants (Basel) 2023; 12:antiox12020369. [PMID: 36829929 PMCID: PMC9952375 DOI: 10.3390/antiox12020369] [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: 12/29/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023] Open
Abstract
Moringa oleifera Lam. is known to have significant antioxidant properties. Because of this, the development of an optimal extraction method is crucial to obtain pharmacological products based on the bioactive compounds produced by this tree. Through a Plackett-Burman and a Box-Behnken design, enzymatic extraction conditions (temperature, agitation, solvent pH and composition, sample-to-solvent ratio, enzyme-to-sample ratio and extraction time) have been optimized using normalized areas (UA/g) as response variable and relative mass (mg/g) as quantification variable. Extractions were performed in an incubator, where all the extraction conditions could be digitally controlled. Thus, 58.9 °C, 50 rpm, 4.0 pH, 32.5% EtOH, 0.2 g sample in 15 mL solvent and 106 U/g were established as the optimal extraction conditions for the extraction with a mix of pectinases coming from Aspergillus niger. Under these optimal conditions, two-minute extractions were performed and evaluated through a single factor design. The enzymatic extraction method demonstrated its suitability to produce extracts with good antioxidant power (antioxidant activity 4.664 ± 0.059 mg trolox equivalent/g sample and total phenolic compounds 6.245 ± 0.101 mg gallic acid equivalent/g sample). The method was also confirmed to have good repeatability (1.39%) and intermediate precision (2.37%) levels.
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Affiliation(s)
- Curro Polo-Castellano
- Department of Analytical Chemistry, Faculty of Sciences, Agrifood Campus of International Excellence (ceiA3), Wine and Food Research Institute (IVAGRO), University of Cadiz, 11510 Puerto Real, Spain
| | - Rosa María Mateos
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta del Mar University Hospital, 11009 Cadiz, Spain
- Area of Biochemistry and Molecular Biology, Department of Biomedicine, Biotechnology and Public Health, University of Cadiz, 11519 Cadiz, Spain
| | - Francisco Visiedo
- Research Unit, Biomedical Research and Innovation Institute of Cadiz (INiBICA), Puerta del Mar University Hospital, 11009 Cadiz, Spain
| | - Miguel Palma
- Department of Analytical Chemistry, Faculty of Sciences, Agrifood Campus of International Excellence (ceiA3), Wine and Food Research Institute (IVAGRO), University of Cadiz, 11510 Puerto Real, Spain
- Correspondence: (M.P.); (M.F.-G.); Tel.: +34-956-016-355 (M.P. & M.F.-G)
| | - Gerardo F. Barbero
- Department of Analytical Chemistry, Faculty of Sciences, Agrifood Campus of International Excellence (ceiA3), Wine and Food Research Institute (IVAGRO), University of Cadiz, 11510 Puerto Real, Spain
| | - Marta Ferreiro-González
- Department of Analytical Chemistry, Faculty of Sciences, Agrifood Campus of International Excellence (ceiA3), Wine and Food Research Institute (IVAGRO), University of Cadiz, 11510 Puerto Real, Spain
- Correspondence: (M.P.); (M.F.-G.); Tel.: +34-956-016-355 (M.P. & M.F.-G)
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Lin W, Xu X, Lv R, Huang W, Ul Haq H, Gao Y, Ren H, Lan C, Tian B. Differential proteomics reveals main determinants for the improved pectinase activity in UV-mutagenized Aspergillus niger strain. Biotechnol Lett 2021; 43:909-918. [PMID: 33449253 DOI: 10.1007/s10529-020-03075-w] [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: 10/22/2020] [Accepted: 12/26/2020] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To reveal the potential mechanism and key determinants that contributed to the improved pectinase activity in Aspergillus niger mutant EIMU2, which was previously obtained by UV-mutagenesis from the wild-type A. niger EIM-6. RESULTS Proteomic analysis for Aspergillus niger EIMU2 by two-dimensional electrophoresis demonstrated that mutant EIMU2 harbored a multiple enzyme system for the degradation of pectin, mainly constituting by main-chain-cleaving enzymes polygalacturonase, pectate lyase, pectinesterase, and some accessory enzymes rhamnogalacturonan lyase and arabinofuranosidase. Further quantitatively differential proteomic analysis revealed that the quantities of four proteins, pectinesterase, rhamnogalacturonan lyase A, DNA-directed RNA polymerase A, and a hypothetical protein in strain EIMU2 were much higher than those in EIM-6. PCR amplification, sequencing and alignment analysis of genes for the two main members of pectin-degrading enzymes, pectate lyase and polygalacturonase showed that their sequences were completely consistent in A. niger EIM-6 and mutant EIMU2. CONCLUSIONS The result demonstrated that the improved pectinase activity by UV-mutagenesis in A. niger EIMU2 was probably contributed to the up-regulated expression of rhamnogalacturonan lyase, or pectinesterase, which resulted in the optimization of synergy amongst different components of pectin-degrading enzymes.
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Affiliation(s)
- Weiling Lin
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China.,Fujian Health College, Fuzhou, 350101, Fujian, China
| | - Xiaohong Xu
- Library, Fujian Normal University, Fuzhou, 350108, Fujian, China
| | - Ruirui Lv
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China
| | - Wei Huang
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China.,Institute of Agricultural Quality Standards and Testing Technology Research, Fujian Academy of Agricultural Sciences, Fuzhou, 350003, Fujian, China
| | - Hafeez Ul Haq
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China
| | - Yuanyuan Gao
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China
| | - Hongli Ren
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China
| | - Canhua Lan
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China
| | - Baoyu Tian
- Engineering Research Center of Industrial Microbiology of Ministry of Education, College of Life Sciences, Fujian Normal University, No.8, Shangsan Road, Cangshan District, Fuzhou, 350108, Fujian, China.
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Xia J, Shu J, Yao K, Xu J, Yu X, Xue X, Ma D, Lin X. Synergism of cellulase, pectinase and xylanase on hydrolyzing differently pretreated sweet potato residues. Prep Biochem Biotechnol 2019; 50:181-190. [PMID: 31647386 DOI: 10.1080/10826068.2019.1680390] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The synergism of cellulase (C), pectinase (P), and xylanase (X) for the saccharification of sweet potato residues (SPR) was investigated. The removal of starch from SPR was easily achieved by using amylase, but the cellulose conversion of de-starched SPR was relatively low, thus dilute H2SO4, NaOH, and H2O2 pretreatment was conducted to improve the enzymatic digestibility. The lignin content of NaOH pretreated SPR was the lowest, whereas H2SO4 pretreatment resulted in the lowest contents of hemicellulose and pectin. The combination of C, P, and X exhibited different sugar production patterns, C-P displayed synergistic action on glucose and galactose production from each type of SPR, C-X also exhibited synergistic effect on glucose production except when H2SO4 pretreated SPR was used, whereas no synergism between P-X on monosaccharide production was observed. The presence of synergism between cellulase and mixed accessory enzymes [C-(PX)] on glucose formation was determined by C-X, and the degree of synergism between C-P and C-(PX) on glucose production had a positive relationship with pectin content. The highest cellulose conversion of 96.2% was obtained from NaOH pretreated SPR using mixed enzymes comprising C, P, and X with the ratio of 8:1:1.
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Affiliation(s)
- Jun Xia
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Jingyi Shu
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Kangwei Yao
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Jiming Xu
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Xinjun Yu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, Zhejiang, P. R. China
| | - Xiang Xue
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Decao Ma
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
| | - Xueqi Lin
- Jiangsu Key Laboratory for Biomass-Based Energy and Enzyme Technology, Jiangsu Collaborative Innovation Center of Regional Modern Agriculture and Environmental Protection, College of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an, Jiangsu, P. R. China
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Sujithra B, Deepika S, Akshaya K, Ponnusami V. Production and optimization of xanthan gum from three-step sequential enzyme treated cassava bagasse hydrolysate. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101294] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Thite VS, Nerurkar AS. Physicochemical characterization of pectinase activity from Bacillus spp. and their accessory role in synergism with crude xylanase and commercial cellulase in enzyme cocktail mediated saccharification of agrowaste biomass. J Appl Microbiol 2018; 124:1147-1163. [PMID: 29411930 DOI: 10.1111/jam.13718] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 01/15/2018] [Accepted: 01/25/2018] [Indexed: 11/27/2022]
Abstract
AIM The aim of this study was to evaluate the physicochemical properties of the crude pectinase activity from three Bacillus isolates of ruminant dung origin and study their synergism with crude xylanases from the same Bacillus spp. and a commercial cellulase to evaluate their accessory role in improved biomass saccharification. METHODS AND RESULTS Pectinolytic crude culture filtrate obtained from three ruminant dung isolates, Bacillus safensis M35, Bacillus altitudinis R31 and Bacillus altitudinis J208, on crude pectin containing medium possessed polygalacturonate hydrolase, pectate lyase and pectin lyase activities. Studies regarding their stability under various temperature and pH conditions revealed their mild acidic to alkaline and mesophilic nature with enzyme activity falling within the pH range 6·0-9·0 and temperature range 30-60°C. The pectinase activity was categorized as endolytic as it brought about ~50% reduction in relative viscosity of pectic polymer within initial 10 min of incubation. Synergism of pectinase activity with crude xylanase activities and/or commercial cellulase was clearly demonstrated as ~1·6 to ~1·9-fold increase in agrowaste biomass saccharification was obtained confirming the role of pectinases as accessory enzymes. CONCLUSION Synergism of the broad-spectrum endopectinase activity obtained from three Bacillus isolates with accessory crude xylanases from the same isolates and commercial cellulase enhanced the agrowaste saccharification and confirmed the accessory role of crude pectinase as they formed an efficient enzyme cocktail functioning in a contributive manner for improvement of agrowaste biomass saccharification. SIGNIFICANCE AND IMPACT OF THE STUDY Mesophilic crude endopectinases obtained from Bacillus spp. isolated from ruminant dung possessed activity in broad pH and temperature ranges as well as broad substrate specificity. Moreover, their synergism with crude xylanase and Primfast® 200 cellulase demonstrated the potential to form efficient enzyme cocktail for application in plant biomass saccharification process.
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Affiliation(s)
- V S Thite
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
| | - A S Nerurkar
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, India
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Alencar BRA, Dutra ED, Sampaio EVDSB, Menezes RSC, Morais MA. Enzymatic hydrolysis of cactus pear varieties with high solids loading for bioethanol production. BIORESOURCE TECHNOLOGY 2018; 250:273-280. [PMID: 29174905 DOI: 10.1016/j.biortech.2017.11.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 11/07/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
The optimization of enzymatic hydrolysis, with high solids loading, of two species of cactus pear for bioethanol production was tested evaluating the influence of surfactant Tween 80 and pretreatment with H2O and H2SO4 (1% v/v) (50 °C, 150 rpm, 3 h). XRD and FTIR analyzes were performed. Afterwards, the influence of the factors cellulase (FPU g-1), pectinase (U g-1) and solids load (% w/v), on the hydrolysis of varieties (50 °C, 150 rpm, 48 h), and the fermentation of the optimal point (33 °C, 8 h) were evaluated. The pretreatments and the Tween 80 did not increase the hydrolysis yields and Rotacional Central Compound Design indicated that the pectinase factor was not significant. The best cellulase and solids load conditions were 10 FPU g-1 of biomass and 30% w/v for both species. The fermentation efficiency of hydrolysates for Nopalea cochenillifera and Opuntia ficus-indica were 76.3% and 82.8%, respectively, showing their potential for bioethanol production.
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Affiliation(s)
- Bárbara Ribeiro Alves Alencar
- Interdepartmental Research Group in Metabolic Engineering, Department of Genetics, Federal University of Pernambuco, 50670-901 Recife, PE, Brazil
| | - Emmanuel Damilano Dutra
- Research Group on Biomass Energy, Department of Nuclear Energy, Federal University of Pernambuco, 50740-540 Recife, PE, Brazil
| | | | - Rômulo Simões Cezar Menezes
- Research Group on Biomass Energy, Department of Nuclear Energy, Federal University of Pernambuco, 50740-540 Recife, PE, Brazil.
| | - Marcos Antônio Morais
- Interdepartmental Research Group in Metabolic Engineering, Department of Genetics, Federal University of Pernambuco, 50670-901 Recife, PE, Brazil
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Zheng YX, Wang YL, Pan J, Zhang JR, Dai Y, Chen KY. Semi-continuous production of high-activity pectinases by immobilized Rhizopus oryzae using tobacco wastewater as substrate and their utilization in the hydrolysis of pectin-containing lignocellulosic biomass at high solid content. BIORESOURCE TECHNOLOGY 2017; 241:1138-1144. [PMID: 28673517 DOI: 10.1016/j.biortech.2017.06.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/11/2017] [Accepted: 06/12/2017] [Indexed: 06/07/2023]
Abstract
In this study, highly reactive endo- and exo-polygalacturonases (PGs) were produced from the tobacco industry wastewater using immobilized Rhizopus oryzae. Compared with free cells, immobilized cells increased enzyme activity 2.8-fold and reduced production time to 24h by shake-flask production. Moreover, the immobilized cells enabled the semi-continuous production of enzymes through repeated-batch mode for seven consecutive cycles in a scale-up bioreactor. During the first five cycles, the average endo-PG and exo-PG activities reached 307.5 and 242.6U/ml, respectively. The addition of crude enzyme for the hydrolysis of pectin-containing lignocellulosic biomass under high-gravity conditions increased glucose release 4.2-fold (115.4 vs. 29.0g/L), compared with hydrolysis using cellulase alone. This process achieves the efficient production of pectin-degrading enzymes, provides a cost-effective method for tobacco wastewater treatment, and offers the possibility to obtain fermentable sugars with high-titer from pectin-containing lignocellulosic biomass, which has important potential for the commercial production of bio-fuels.
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Affiliation(s)
- Yu-Xi Zheng
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China; China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
| | - Yuan-Liang Wang
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China.
| | - Jun Pan
- Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China
| | - Jian-Rong Zhang
- Research Center for Tobacco Bioengineering and Technology of Chongqing Science and Technology Commission, Chongqing 401147, China
| | - Ya Dai
- China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
| | - Kun-Yan Chen
- China Tobacco Chongqing Industrial Co. Ltd., Chongqing 400000, China
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Zheng Y, Wang Y, Zhang J, Pan J. Using tobacco waste extract in pre-culture medium to improve xylose utilization for l-lactic acid production from cellulosic waste by Rhizopus oryzae. BIORESOURCE TECHNOLOGY 2016; 218:344-50. [PMID: 27376833 DOI: 10.1016/j.biortech.2016.06.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 06/17/2016] [Accepted: 06/18/2016] [Indexed: 06/06/2023]
Abstract
The aim of this work was to study the high-titer l-lactic acid production from cellulosic waste using Rhizopus oryzae. The tobacco waste water-extract (TWE) added with 5g/L glucose and 0.1g/L vitamin C was optimized as pre-culture medium for R. oryzae. Results found that compared to traditional pre-culture medium, it improved xylose consumption rate up to 2.12-fold and enhanced l-lactic acid yield up to 1.73-fold. The highest l-lactic acid concentration achieved was 173.5g/L, corresponding to volumetric productivity of 1.45g/Lh and yield of 0.860g/g total reducing sugar in fed-batch fermentation. This process achieves efficient production of polymer-grade l-lactic acid from cellulosic feedstocks, lowers the cost of fungal cell pre-culture and provides a novel way for re-utilization of tobacco waste.
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Affiliation(s)
- Yuxi Zheng
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Yuanliang Wang
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Jianrong Zhang
- Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China
| | - Jun Pan
- Bioengineering College, Chongqing University, Chongqing 400044, China; Research Center for Tobacco Bioengineering and Technology, Chongqing Science and Technology Commission, Yubei District, Chongqing 401147, China.
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Song Y, Wi SG, Kim HM, Bae HJ. Cellulosic bioethanol production from Jerusalem artichoke (Helianthus tuberosus L.) using hydrogen peroxide-acetic acid (HPAC) pretreatment. BIORESOURCE TECHNOLOGY 2016; 214:30-36. [PMID: 27115748 DOI: 10.1016/j.biortech.2016.04.065] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/14/2016] [Accepted: 04/15/2016] [Indexed: 06/05/2023]
Abstract
Jerusalem artichoke (JA) is recognized as a suitable candidate biomass crop for bioethanol production because it has a rapid growth rate and high biomass productivity. In this study, hydrogen peroxide-acetic acid (HPAC) pretreatment was used to enhance the enzymatic hydrolysis and to effectively remove the lignin of JA. With optimized enzyme doses, synergy was observed from the combination of three different enzymes (RUT-C30, pectinase, and xylanase) which provided a conversion rate was approximately 30% higher than the rate with from treatment with RUT-C30 alone. Fermentation of the JA hydrolyzates by Saccharomyces cerevisiae produced a fermentation yield of approximately 84%. Therefore, Jerusalem artichoke has potential as a bioenergy crop for bioethanol production.
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Affiliation(s)
- Younho Song
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Seung Gon Wi
- Bio-energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Ho Myeong Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Hyeun-Jong Bae
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea; Bio-energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea.
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Aguilar-Pontes MV, Zhou M, van der Horst S, Theelen B, de Vries RP, van den Brink J. Sexual crossing of thermophilic fungus Myceliophthora heterothallica improved enzymatic degradation of sugar beet pulp. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:41. [PMID: 26900400 PMCID: PMC4761134 DOI: 10.1186/s13068-016-0460-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Accepted: 02/10/2016] [Indexed: 05/21/2023]
Abstract
BACKGROUND Enzymatic degradation of plant biomass requires a complex mixture of many different enzymes. Like most fungi, thermophilic Myceliophthora species therefore have a large set of enzymes targeting different linkages in plant polysaccharides. The majority of these enzymes have not been functionally characterized, and their role in plant biomass degradation is unknown. The biotechnological challenge is to select the right set of enzymes to efficiently degrade a particular biomass. This study describes a strategy using sexual crossing and screening with the thermophilic fungus Myceliophthora heterothallica to identify specific enzymes associated with improved sugar beet pulp saccharification. RESULTS Two genetically diverse M. heterothallica strains CBS 203.75 and CBS 663.74 were used to generate progenies with improved growth on sugar beet pulp. One progeny, named SBP.F1.2.11, had a different genetic pattern from the parental strains and had improved saccharification activity after the growth on 3 % sugar beet pulp. The improved SBP saccharification was not explained by altered activities of the major (hemi-)cellulases. Exo-proteome analysis of progeny and parental strains after 7-day growth on sugar beet pulp showed that only 17 of the 133 secreted CAZy enzymes were more abundant in progeny SBP.F1.2.11. Particularly one enzyme belonging to the carbohydrate esterase family 5 (CE5) was more abundant in SBP.F1.2.11. This CE5-CBM1 enzyme, named as Axe1, was phylogenetically related to acetyl xylan esterases. Biochemical characterization of Axe1 confirmed de-acetylation activity with optimal activities at 75-85 °C and pH 5.5-6.0. Supplementing Axe1 to CBS 203.75 enzyme set improved release of xylose and glucose from sugar beet pulp. CONCLUSIONS This study identified beneficial enzymes for sugar beet pulp saccharification by selecting progeny with improved growth on this particular substrate. Saccharification of sugar beet pulp was improved by supplementing enzyme mixtures with a previously uncharacterized CE5-CBM1 acetyl xylan esterase. This shows that sexual crossing and selection of M. heterothallica are the successful strategy to improve the composition of enzyme mixtures for efficient plant biomass degradation.
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Affiliation(s)
- Maria Victoria Aguilar-Pontes
- />Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- />Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
| | - Miaomiao Zhou
- />Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- />Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
| | - Sjors van der Horst
- />Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- />Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
| | - Bart Theelen
- />Yeast and Basidiomycete Research, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
| | - Ronald P. de Vries
- />Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- />Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
| | - Joost van den Brink
- />Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- />Fungal Molecular Physiology, Utrecht University, Utrecht, The Netherlands
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12
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de Lima EA, Machado CB, Zanphorlin LM, Ward RJ, Sato HH, Ruller R. GH53 Endo-Beta-1,4-Galactanase from a Newly Isolated Bacillus licheniformis CBMAI 1609 as an Enzymatic Cocktail Supplement for Biomass Saccharification. Appl Biochem Biotechnol 2016; 179:415-26. [DOI: 10.1007/s12010-016-2003-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 01/27/2016] [Indexed: 11/24/2022]
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13
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14
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Laothanachareon T, Bunterngsook B, Suwannarangsee S, Eurwilaichitr L, Champreda V. Synergistic action of recombinant accessory hemicellulolytic and pectinolytic enzymes to Trichoderma reesei cellulase on rice straw degradation. BIORESOURCE TECHNOLOGY 2015; 198:682-690. [PMID: 26433794 DOI: 10.1016/j.biortech.2015.09.053] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 09/12/2015] [Accepted: 09/14/2015] [Indexed: 06/05/2023]
Abstract
Synergism between core cellulases and accessory hydrolytic/non-hydrolytic enzymes is the basis of efficient hydrolysis of lignocelluloses. In this study, the synergistic action of three recombinant accessory enzymes, namely GH62 α-l-arabinofuranosidase (ARA), CE8 pectin esterase (PET), and GH10 endo-1,4-beta-xylanase (XYL) from Aspergillus aculeatus expressed in Pichia pastoris to a commercial Trichoderma reesei cellulase (Accellerase® 1500; ACR) on hydrolysis of alkaline pretreated rice straw was studied using a mixture design approach. Applying the full cubic model, the optimal ratio of quaternary enzyme mixture was predicted to be ACR:ARA:PET:XYL of 0.171:0.079:0.100:0.150, which showed a glucose releasing efficiency of 0.173 gglc/FPU, higher than the binary ACR:XYL mixture (0.122 gglc/FPU) and ACR alone (0.081 gglc/FPU) leading to a 47.3% increase in glucose yield compared with that from ACR at the same cellulase dosage. The result demonstrates the varying degree of synergism of accessory enzymes to cellulases useful for developing tailor-made enzyme systems for bio-industry.
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Affiliation(s)
- Thanaporn Laothanachareon
- Enzyme Technology Laboratory and Integrative Biorefinery Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park, 113 Pahonyothin Road, Pathumthani 12120, Thailand
| | - Benjarat Bunterngsook
- Enzyme Technology Laboratory and Integrative Biorefinery Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park, 113 Pahonyothin Road, Pathumthani 12120, Thailand
| | - Surisa Suwannarangsee
- Enzyme Technology Laboratory and Integrative Biorefinery Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park, 113 Pahonyothin Road, Pathumthani 12120, Thailand
| | - Lily Eurwilaichitr
- Enzyme Technology Laboratory and Integrative Biorefinery Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park, 113 Pahonyothin Road, Pathumthani 12120, Thailand
| | - Verawat Champreda
- Enzyme Technology Laboratory and Integrative Biorefinery Laboratory, National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Thailand Science Park, 113 Pahonyothin Road, Pathumthani 12120, Thailand.
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15
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Li S, Tang B, Xu Z, Chen T, Liu L. Fermentation Optimization and Unstructured Kinetic Model for Cellulase Production by Rhizopus stolonifer var. reflexus TP-02 on Agriculture By-Products. Appl Biochem Biotechnol 2015; 177:1589-606. [PMID: 26400494 DOI: 10.1007/s12010-015-1839-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 09/07/2015] [Indexed: 11/24/2022]
Abstract
Agricultural by-products, rice straw, wheat bran juice, and soybean residue, were used as substrates for cellulase production using Rhizopus stolonifer var. reflexus TP-02. The culture medium was optimized though uniform design experimentation during shaking flask fermentation, and the ideal formulation obtained for filter paper enzyme (FPase) production was 10 % bran diffusion juice, 1 % rice straw, 0.17 % urea, 0.17 % soybean residue, 0.11 % KH2PO4, and 0.027 % Tween 80, and the maximal FPase activity in the culture supernatant was 13.16 U/mL at an incubation time of 3 days. A kinetic model for cellulase production in batch fermentation was subsequently developed. The unstructured kinetic model considered three responses, namely biomass, cellulase, and sugar. Models for the production of three types of cellulase components (i.e., endoglucanases, cellobiohydrolases, and β-glucosidases) were established to adequately describe the cellulase production pattern. It was found that the models fitted the experimental data well under pH 5.0 and 6.0, but only the avicelase production model predicted the experimental data under pH-uncontrolled conditions.
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Affiliation(s)
- Song Li
- Microorganism Fermentation Engineering and Technology Research Center of Anhui Province, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China.,School of Biological and Chemical Engineering, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China
| | - Bin Tang
- Microorganism Fermentation Engineering and Technology Research Center of Anhui Province, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China. .,School of Biological and Chemical Engineering, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China.
| | - Zhongyuan Xu
- Microorganism Fermentation Engineering and Technology Research Center of Anhui Province, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China.,School of Biological and Chemical Engineering, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China
| | - Tao Chen
- Microorganism Fermentation Engineering and Technology Research Center of Anhui Province, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China.,School of Biological and Chemical Engineering, Anhui Polytechnic University, Central Beijing Road, Wuhu, 241000, China
| | - Long Liu
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, 1800 Lihu Avenue, Wuxi, 214122, China
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16
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Agrawal R, Gaur R, Mathur A, Kumar R, Gupta RP, Tuli DK, Satlewal A. Improved saccharification of pilot-scale acid pretreated wheat straw by exploiting the synergistic behavior of lignocellulose degrading enzymes. RSC Adv 2015. [DOI: 10.1039/c5ra13360b] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Improved saccharification by exploiting the synergism between biomass degrading enzymes.
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Affiliation(s)
- Ruchi Agrawal
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Ruchi Gaur
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Anshu Mathur
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Ravindra Kumar
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Ravi Prakash Gupta
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Deepak K. Tuli
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
| | - Alok Satlewal
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil Corporation Ltd
- Research and Development Centre
- Faridabad 121007
- India
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17
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Khelil O, Choubane S, Cheba BA. Co-production of Cellulases and Manganese Peroxidases by Bacillus sp. R2 and Bacillus Cereus 11778 on Waste Newspaper: Application in Dyes Decolourization. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.protcy.2015.02.140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Karnaouri A, Topakas E, Antonopoulou I, Christakopoulos P. Genomic insights into the fungal lignocellulolytic system of Myceliophthora thermophila. Front Microbiol 2014; 5:281. [PMID: 24995002 PMCID: PMC4061905 DOI: 10.3389/fmicb.2014.00281] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 05/22/2014] [Indexed: 01/08/2023] Open
Abstract
The microbial conversion of solid cellulosic biomass to liquid biofuels may provide a renewable energy source for transportation fuels. Cellulolytic fungi represent a promising group of organisms, as they have evolved complex systems for adaptation to their natural habitat. The filamentous fungus Myceliophthora thermophila constitutes an exceptionally powerful cellulolytic microorganism that synthesizes a complete set of enzymes necessary for the breakdown of plant cell wall. The genome of this fungus has been recently sequenced and annotated, allowing systematic examination and identification of enzymes required for the degradation of lignocellulosic biomass. The genomic analysis revealed the existence of an expanded enzymatic repertoire including numerous cellulases, hemicellulases, and enzymes with auxiliary activities, covering the most of the recognized CAZy families. Most of them were predicted to possess a secretion signal and undergo through post-translational glycosylation modifications. These data offer a better understanding of activities embedded in fungal lignocellulose decomposition mechanisms and suggest that M. thermophila could be made usable as an industrial production host for cellulolytic and hemicellulolytic enzymes.
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Affiliation(s)
- Anthi Karnaouri
- Biotechnology Laboratory, Department of Synthesis and Development of Industrial Processes, School of Chemical Engineering, National Technical University of Athens Athens, Greece ; Biochemical Process Engineering, Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology Luleå, Sweden
| | - Evangelos Topakas
- Biotechnology Laboratory, Department of Synthesis and Development of Industrial Processes, School of Chemical Engineering, National Technical University of Athens Athens, Greece
| | - Io Antonopoulou
- Biochemical Process Engineering, Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology Luleå, Sweden
| | - Paul Christakopoulos
- Biochemical Process Engineering, Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology Luleå, Sweden
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19
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Li J, Zhou P, Liu H, Xiong C, Lin J, Xiao W, Gong Y, Liu Z. Synergism of cellulase, xylanase, and pectinase on hydrolyzing sugarcane bagasse resulting from different pretreatment technologies. BIORESOURCE TECHNOLOGY 2014; 155:258-65. [PMID: 24457310 DOI: 10.1016/j.biortech.2013.12.113] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 12/18/2013] [Accepted: 12/26/2013] [Indexed: 05/17/2023]
Abstract
Sugarcane bagasse (SCB) resulting from different pretreatments was hydrolyzed by enzyme cocktails based on replacement of cellulase (Celluclast 1.5 L:Novozym 188=1FPU:4pNPGU) by xylanase or pectinase at different proportions. Lignin content of NaOH pretreated SCB and hemicellulose content of H2SO4 pretreated SCB were the lowest. NaOH pretreatment showed the best for monosaccharide production among the four pretreatments. Synergism was apparently observed between cellulase and xylanase for monosaccharide production from steam exploded SCB (SESB), NaOH, and H2O2 pretreated SCB. No synergism was observed between cellulase and pectinase for producing glucose. Additionally, no synergism was present when H2SO4 pretreated SCB was used. Replacement of 20% of the cellulase by xylanase enhanced the glucose yield by 6.6%, 8.8%, and 9.5% from SESB, NaOH, and H2O2 pretreated SCB, respectively. Degree of synergism between cellulase and xylanase had positive relationship with xylan content and was affected by hydrolysis time.
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Affiliation(s)
- Jingbo Li
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China.
| | - Pengfei Zhou
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Hongmei Liu
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Chunjiang Xiong
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Jianghai Lin
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Wenjuan Xiao
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Yingxue Gong
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China
| | - Zehuan Liu
- Research Center for Molecular Biology, Institutes of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, PR China.
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20
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Swiątek K, Lewandowska M, Swiątek M, Bednarski W, Brzozowski B. The improvement of enzymatic hydrolysis efficiency of rape straw and Miscanthus giganteus polysaccharides. BIORESOURCE TECHNOLOGY 2014; 151:323-31. [PMID: 24269826 DOI: 10.1016/j.biortech.2013.10.090] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Revised: 10/25/2013] [Accepted: 10/28/2013] [Indexed: 05/15/2023]
Abstract
The research was carried out with the aim to determine the impact of various combinations of cellulase and hemicellulase preparations on the effectiveness of enzymatic hydrolysis of polysaccharides of rape straw and Miscanthus giganteus after alkaline pretreatment. Their effectiveness was evaluated based on the quantity of saccharides released during enzymatic reaction and yield calculated in respect of the sum of polysaccharides present in native substrates. The complex of preparations produced from Trichoderma longibrachiatum fungi turned out to be the most effective. The study demonstrated a significant effect of xylanases from T. longibrachiatum, the presence of which evoked a 27-45% increase in the effectiveness of polysaccharides hydrolysis compared to the enzymatic complexes without their addition. In addition, results achieved in this study confirmed the necessity of applying the pretreatment in lignocellulose substrates conversion into bioethanol.
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Affiliation(s)
- Karolina Swiątek
- Chair of Food Biotechnology, University of Warmia and Mazury in Olsztyn, Heweliusza 1, 10-718 Olsztyn, Poland.
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21
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Visser EM, Falkoski DL, de Almeida MN, Maitan-Alfenas GP, Guimarães VM. Production and application of an enzyme blend from Chrysoporthe cubensis and Penicillium pinophilum with potential for hydrolysis of sugarcane bagasse. BIORESOURCE TECHNOLOGY 2013; 144:587-94. [PMID: 23896443 DOI: 10.1016/j.biortech.2013.07.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/02/2013] [Accepted: 07/04/2013] [Indexed: 05/24/2023]
Abstract
Blending of the enzyme extracts produced by different fungi can result in favorable synergetic enhancement of the enzyme blend with regards to the main cellulase activities, as well as the inclusion of accessory enzymes that may not be as abundant in enzyme extracts produced by predominantly cellulase producing fungi. The Chrysoporthe cubensis:Penicillium pinophilum 50:50 (v/v) blend produced herein presented good synergy, especially for FPase and endoglucanase activities which were 76% and 48% greater than theoretical, respectively. This enzyme blend was applied to sugarcane bagasse previously submitted to a simple alkali pretreatment. Glucan hydrolysis efficiency reached an excess of 60% and xylan conversion exceeded 90%. Increasing the hydrolysis temperature from 45 to 50°C also resulted in a 16-20% increase in conversion of both glucan and xylan fractions. The blended enzyme extract obtained therefore showed great potential for application in the lignocellulose hydrolysis process.
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Affiliation(s)
- Evan Michael Visser
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal de Viçosa, Campus Universitário, Viçosa, MG, Brazil.
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