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Bucci P, Casas A, Martins P, Meyer A, Cantero D, Muñoz R. A comparative assessment of treatment methods to release ferulic and p-cumaric acids from Brewer's Spent Grains. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 188:39-47. [PMID: 39098271 DOI: 10.1016/j.wasman.2024.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/18/2024] [Accepted: 07/21/2024] [Indexed: 08/06/2024]
Abstract
Brewers' spent grain (BSG) is the main byproduct from the brewing industry, which accounts for 85 % of the total waste generated during beer production. This lignocellulosic material is traditionally used as livestock feed and sold at a low price. However, BSG can be used as a low-cost feedstock for the production of bioactive molecules and chemicals precursors, upgrading the value of this byproduct. In this context, BSG is a promising feedstock for the extraction of antioxidants like ferulic acid (FA) and p-coumaric acid (p-Cu). The effectiveness of three hydrolysis treatments were evaluated for the extraction of FA and p-Cu from BSG, namely enzymatic (based on the synergistic cooperation between a feruloyl esterase and an endo-1,4-β-xylanase), alkaline and hydrothermal. The hydrothermal treatment produced the highest extraction yields (7.2 g/kgBSG and 1.4 g/kgBSG for FA and p-Cu, respectively) in a short extraction time (an hour). On the other hand, enzymatic hydrolysis extracted 4.3 g/kgBSG for FA and negligible yields for p-Cu in 4 h of incubation at 25 °C. Yields of 5.5 g/kgBSG for FA and 0.6 g/kgBSG for p-Cu were obtained in more than 5 h of alkaline treatment at 120 °C. The mass and energy balances revealed the high dependence of the operating costs on the concentration of BSG used during the extraction process, with costs of 34.5 €, 6607 € and 205.5 € per kg of FA for the chemical, enzymatic and hydrothermal extraction methods at 100 kg BSG/m3.
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Affiliation(s)
- P Bucci
- Institute of Sustainable Processes, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011, Spain
| | - A Casas
- The Institute of Bioeconomy. Calle Dr Mergelina S/N, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Valladolid 47011, Spain
| | - P Martins
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
| | - A Meyer
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark
| | - D Cantero
- The Institute of Bioeconomy. Calle Dr Mergelina S/N, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Valladolid 47011, Spain
| | - R Muñoz
- Institute of Sustainable Processes, Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011, Spain.
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Anagnostopoulou E, Tsouko E, Maina S, Myrtsi ED, Haroutounian S, Papanikolaou S, Koutinas A. Unlocking the potential of spent coffee grounds via a comprehensive biorefinery approach: production of microbial oil and carotenoids under fed-batch fermentation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:35483-35497. [PMID: 38727974 DOI: 10.1007/s11356-024-33609-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 05/04/2024] [Indexed: 05/30/2024]
Abstract
The valorization of renewable feedstock to produce a plethora of value-added products could promote the transition towards a circular bioeconomy. This study presents the development of cascade processes to bioconvert spent coffee grounds (SCGs) into microbial oil and carotenoids employing sustainable practices. The stepwise recovery of crude phenolic extract and coffee oil was carried out using green or recyclable solvents, i.e., aqueous ethanol and hexane. Palmitic acid (43.3%) and linoleic acid (38.9%) were the major fatty acids in the oil fraction of SCGs. The LC-MS analysis of crude phenolic extracts revealed that chlorogenic acid dominated (45.7%), while neochlorogenic acid was also detected in substantial amounts (24.0%). SCGs free of coffee oil and phenolic compounds were subjected to microwave-assisted pretreatment under different irradiations and solvents to enhance subsequent enzymatic saccharification. Microwave/water pretreatment at 400 W, followed by enzymatic hydrolysis with proteases, hemicellulases, and cellulases, at 50 g/L initial SCGs, led to satisfying overall yields of cellulose (75.4%), hemicellulose (50.3%), and holocellulose (55.3%). Mannan was the most extractable polysaccharide followed by galactan and arabinan. SCGs hydrolysate was used in fed-batch bioreactor fermentations with Rhodosporidium toruloides to produce 24.0 g/L microbial oil and carotenoids of 432.9 μg/g biomass.
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Affiliation(s)
- Elena Anagnostopoulou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Erminta Tsouko
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece.
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Ave, 11635, Athens, Greece.
| | - Sofia Maina
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Eleni D Myrtsi
- Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Serkos Haroutounian
- Department of Nutritional Physiology and Feeding, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Seraphim Papanikolaou
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Apostolos Koutinas
- Department of Food Science and Human Nutrition, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
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Generation of phenolic-rich extracts from brewers' spent grain and characterisation of their in vitro and in vivo activities. INNOV FOOD SCI EMERG 2021. [DOI: 10.1016/j.ifset.2021.102617] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Kavalopoulos M, Stoumpou V, Christofi A, Mai S, Barampouti EM, Moustakas K, Malamis D, Loizidou M. Sustainable valorisation pathways mitigating environmental pollution from brewers' spent grains. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 270:116069. [PMID: 33338956 DOI: 10.1016/j.envpol.2020.116069] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/30/2020] [Accepted: 11/08/2020] [Indexed: 06/12/2023]
Abstract
In this work, valorisation pathways of brewers' spent grains (BSG) towards biofuels production under the biorefinery concept were studied utilizing experimental data that provide a common base for straightforward comparison. The dehydration and the recovery of used oil, bioethanol and biogas from BSG were studied. The process units involved were thoroughly investigated and optimized. The oil extraction efficiency reached up to 70% using solid-liquid extraction process with hexane as solvent. The optimal ethanol yield achieved was 45% after the application of acid pretreatment, enzymatic hydrolysis with CellicCTec2 and fermentation with S. Cerevisiae. As far as biogas potential is concerned, the raw BSG, defatted BSG and stillage presented values equal to 379 ± 19, 235 ± 21 and 168 ± 39 mL biogas/g for respectively. Through the combination of the proposed schemes, three biorefinery scenarios were set up able to produce biodiesel, bioethanol and/or biogas. Material flow diagrams were set up in order to assess these schemes. Given that BSG could ensure 'green' energy production in the range of 4.5-7.0 million MJ/y if the European BSG potential is fully valorised, BSG could substantially contribute to the biofuel energy strategy.
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Affiliation(s)
- Michael Kavalopoulos
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Vasileia Stoumpou
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Andreas Christofi
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Sofia Mai
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Elli Maria Barampouti
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Konstantinos Moustakas
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Dimitris Malamis
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece
| | - Maria Loizidou
- National Technical University of Athens, School of Chemical Engineering, Unit of Environmental Science Technology, 9 Heroon Polytechniou Str., Zographou Campus, Athens, GR-15780, Greece.
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Sharma A, Sharma A, Singh J, Sharma P, Tomar GS, Singh S, Nain L. A biorefinery approach for the production of ferulic acid from agroresidues through ferulic acid esterase of lactic acid bacteria. 3 Biotech 2020; 10:367. [PMID: 32832328 DOI: 10.1007/s13205-020-02360-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 07/25/2020] [Indexed: 12/11/2022] Open
Abstract
Ferulic acid is a known precursor for vanillin production but the significance of agro waste as substrates for its extraction, in combination with microbes is a less explored option. Various lactic acid bacteria were screened for the production of ferulic acid esterase (FAE) and Enterococcus lactis SR1 was found to produce maximum FAE (7.54 ± 0.15 IU/ml) in the synthetic medium under submerged fermentation. To make the process cost effective, various lignocellulosic agroresidues were evaluated for the production of FAE from the bacterium. It was found that wheat bran serves as the best substrate for FAE production (4.18 ± 0.12 IU/ml) from E. lactis SR1. Further, optimization of fermentation conditions for FAE production from E. lactis SR1 using wheat bran as carbon source led to an increase in the enzyme production (7.09 ± 0.21 IU/ml) by 1.5 fold. The FAE produced was used alone or in combination with commercial holocellulase for biological release of FA from the tested agroresidues. The highest release of FA (mg/g) by enzymatic extraction occurred in sugarbeet pulp (2.56), followed by maize bran (1.45), wheat bran (1.39) and rice bran (0.87), when both the enzymes (FAE and holocellulase) were used together. Alkaline extraction and purification of ferulic acid (FA) from these agro residues also showed that sugarbeet pulp contains the highest amount of FA (5.5 mg/g) followed by maize bran (3.0 mg/g), wheat bran (2.8 mg/g) and rice bran (1.9 mg/g), similar to the trend obtained in biological/enzymatic extraction of FA from these residues. Furthermore, the substrates were found to release higher reducing sugars when both commercial holocellulase and FAE were used in combination than by the use of holocellulase alone. Thus, FAEs not only release FA but also enabled hemicellulase and cellulase to release more sugars from plant material.
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Rachwał K, Waśko A, Gustaw K, Polak-Berecka M. Utilization of brewery wastes in food industry. PeerJ 2020; 8:e9427. [PMID: 32742775 PMCID: PMC7367049 DOI: 10.7717/peerj.9427] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/05/2020] [Indexed: 12/13/2022] Open
Abstract
Beer is the most popular low-alcohol beverage consumed in large amounts in many countries each year. The brewing industry is an important global business with huge annual revenues. It is profitable and important for the economies of many countries around the world. The brewing process involves several steps, which lead to fermentation of sugars contained in malt and conversion thereof into alcohol and carbon dioxide by yeasts. Beer brewing generates substantial amounts of by-products. The three main brewing industry wastes include brewer's spent grain, hot trub, and residual brewer's yeast. Proper management of these wastes may bring economical benefits and help to protect the environment from pollution caused by their excessive accumulation. The disposal of these wastes is cumbersome for the producers, however they are suitable for reuse in the food industry. Given their composition, they can serve as a low-cost and highly nutritional source of feed and food additives. They also have a potential to be a cheap material for extraction of compounds valuable for the food industry and a component of media used in biotechnological processes aimed at production of compounds and enzymes relevant for the food industry.
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Affiliation(s)
- Kamila Rachwał
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Lublin, Poland
| | - Adam Waśko
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Lublin, Poland
| | - Klaudia Gustaw
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Lublin, Poland
| | - Magdalena Polak-Berecka
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Lublin, Poland
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Dimarogona M, Topakas E, Christakopoulos P, Chrysina ED. The crystal structure of a Fusarium oxysporum feruloyl esterase that belongs to the tannase family. FEBS Lett 2020; 594:1738-1749. [PMID: 32297315 DOI: 10.1002/1873-3468.13776] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 12/31/2022]
Abstract
Feruloyl esterases are enzymes of industrial interest that catalyse the hydrolysis of the ester bond between hydroxycinnamic acids such as ferulic acid and sugars present in the plant cell wall. Although there are several structures of biochemically characterized feruloyl esterases available, the structural determinants of their substrate specificity are not yet fully understood. Here, we present the crystal structure of a feruloyl esterase from Fusarium oxysporum (FoFaeC) at 2.3 Å resolution. Similar to the two other tannase-like feruloyl esterases, FoFaeC features a large lid domain covering the active site with potential regulatory role and a disulphide bond that brings together the serine and histidine of the catalytic triad. Differences are mainly observed in the metal coordination site and the substrate binding pocket. ENZYMES: E.C.3.1.1.73. DATABASES: The sequence of FoFaeC has been deposited with UniProt with accession code A0A1D3S5H0_FUSOX and the atomic coordinates of the three-dimensional structure with Protein Data Bank, with PDB code: 6FAT.
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Affiliation(s)
- Maria Dimarogona
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece.,School of Chemical Engineering, National Technical University of Athens, Greece
| | - Evangelos Topakas
- School of Chemical Engineering, National Technical University of Athens, Greece
| | - Paul Christakopoulos
- Biochemical Process Engineering, Division of Chemical Engineering, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Sweden
| | - Evangelia D Chrysina
- Institute of Chemical Biology, National Hellenic Research Foundation, Athens, Greece
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Shen Y, Abeynayake R, Sun X, Ran T, Li J, Chen L, Yang W. Feed nutritional value of brewers' spent grain residue resulting from protease aided protein removal. J Anim Sci Biotechnol 2019; 10:78. [PMID: 31548885 PMCID: PMC6749689 DOI: 10.1186/s40104-019-0382-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 07/25/2019] [Indexed: 11/10/2022] Open
Abstract
Background This study was conducted to evaluate the feed nutritional value of brewers’ spent grain (BSG) residue resulting from protease aided protein removal. The nutritional value was measured as nutrient content, gas production, nutrient digestibility and fermentation characteristics in batch culture. Results Protein extraction process decreased content of crude protein but concentrated the neutral detergent fibre (NDF) and ferulic acid in BSG residue. The changes in the chemical composition of BSG residue varied with enzyme and enzyme dosage. Digestibility of dry matter (DMD) and NDF of residue differed among proteases. Increasing alcalase dosage linearly decreased DMD, whereas, the DMD linearly increased as everlase or flavourzyme dosage increased. Compared with BSG, the DMD, gas production and fermentation acid concentration of BSG residues were lower, whereas NDF digestibility was higher. Conclusions The substantially increased NDF content and improved in vitro NDF digestibility due to protease hydrolysis suggest that BSG residue can be potentially exploited as a viable fibre source for ruminant feeding.
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Affiliation(s)
- Yizhao Shen
- College of Animal Science and Technology, Hebei Agricultural University, Baoding, 071029 Hebei Republic of China.,Agriculture and Agri-Food of Canada, Lethbridge Research and Development Centre, Lethbridge, AB AB T1J4B1 Canada
| | - Ranithri Abeynayake
- 3Department of Agricultural Food & Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5 Canada
| | - Xin Sun
- College of Food Science and Engineering, Shandong Agricultural University, Taian, 271000 Shandong Republic of China
| | - Tao Ran
- Agriculture and Agri-Food of Canada, Lethbridge Research and Development Centre, Lethbridge, AB AB T1J4B1 Canada
| | - Jianguo Li
- College of Animal Science and Technology, Hebei Agricultural University, Baoding, 071029 Hebei Republic of China
| | - Lingyun Chen
- 3Department of Agricultural Food & Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5 Canada
| | - Wenzhu Yang
- Agriculture and Agri-Food of Canada, Lethbridge Research and Development Centre, Lethbridge, AB AB T1J4B1 Canada
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Akermann A, Weiermüller J, Ulber R. Aufbau eines Bioraffineriekonzeptes für Biertreber mit vorgelagertem Pressschritt. CHEM-ING-TECH 2019. [DOI: 10.1002/cite.201900017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alexander Akermann
- Technische Universität Kaiserslautern Fachbereich Maschinenbau und Verfahrenstechnik, Lehrgebiet für Bioverfahrenstechnik Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
| | - Jens Weiermüller
- Technische Universität Kaiserslautern Fachbereich Maschinenbau und Verfahrenstechnik, Lehrgebiet für Bioverfahrenstechnik Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
| | - Roland Ulber
- Technische Universität Kaiserslautern Fachbereich Maschinenbau und Verfahrenstechnik, Lehrgebiet für Bioverfahrenstechnik Gottlieb-Daimler-Straße 49 67663 Kaiserslautern Deutschland
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Tailoring the specificity of the type C feruloyl esterase FoFaeC from Fusarium oxysporum towards methyl sinapate by rational redesign based on small molecule docking simulations. PLoS One 2018; 13:e0198127. [PMID: 29795702 PMCID: PMC5967792 DOI: 10.1371/journal.pone.0198127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 05/14/2018] [Indexed: 01/15/2023] Open
Abstract
The type C feruloyl esterase FoFaeC from Fusarium oxysporum is a newly discovered enzyme with high potential for use in the hydrolysis of lignocellulosic biomass but it shows low activity towards sinapates. In this work, small molecule docking simulations were employed in order to identify important residues for the binding of the four model methyl esters of hydroxycinnamic acids, methyl ferulate/caffeate/sinapate/p-coumarate, to the predicted structure of FoFaeC. Subsequently rational redesign was applied to the enzyme’ active site in order to improve its specificity towards methyl sinapate. A double mutation (F230H/T202V) was considered to provide hydrophobic environment for stabilization of the methoxy substitution on sinapate and a larger binding pocket. Five mutant clones and the wild type were produced in Pichia pastoris and biochemically characterized. All clones showed improved activity, substrate affinity, catalytic efficiency and turnover rate compared to the wild type against methyl sinapate, with clone P13 showing a 5-fold improvement in catalytic efficiency. Although the affinity of all mutant clones was improved against the four model substrates, the catalytic efficiency and turnover rate decreased for the substrates containing a hydroxyl substitution.
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Ikram S, Huang L, Zhang H, Wang J, Yin M. Composition and Nutrient Value Proposition of Brewers Spent Grain. J Food Sci 2017; 82:2232-2242. [PMID: 28833108 DOI: 10.1111/1750-3841.13794] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 05/22/2017] [Accepted: 05/30/2017] [Indexed: 01/30/2023]
Abstract
Brewer's spent grain (BSG), a major brewing industry byproduct, is generated in large quantities annually. This review summarizes research into the composition and preservation of BSG, different extraction techniques for BSG proteins and phenolic acids, and the bioactivities of these phenolic components. Moreover, this article also highlights BSG integration into foodstuff for human consumption and animal feed supplements. BSG is considered a rich source of fiber, protein, and phenolic compounds. The phenolic acids present in BSG are hydroxycinnamic acids (ferulic, p-coumaric, and caffeic acids), which have many biofunctions, such as antioxidant, anticarcinogenic, antiatherogenic, and antiinflammatory activities. Previously, attempts have been made to integrate BSG into human food, such as ready-to-eat snacks, cookies and bread, to increase fiber and protein contents. The addition of BSG to animal feed leads to increased milk yields, higher fat contents in milk, and is a good source of essential amino acids. Therefore, many studies have concluded that integrating the biofunctional compounds in BSG into human food and animal feed has various health benefits.
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Affiliation(s)
- Sana Ikram
- Innovation Center for Food Nutrition and Human Health, China
| | - LianYan Huang
- Innovation Center for Food Nutrition and Human Health, China
| | - Huijuan Zhang
- Innovation Center for Food Nutrition and Human Health, China
| | - Jing Wang
- Innovation Center for Food Nutrition and Human Health, China.,Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business Univ. (BTBU), Beijing, 100048, China
| | - Meng Yin
- Innovation Center for Food Nutrition and Human Health, China
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13
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Lynch KM, Steffen EJ, Arendt EK. Brewers' spent grain: a review with an emphasis on food and health. JOURNAL OF THE INSTITUTE OF BREWING 2016. [DOI: 10.1002/jib.363] [Citation(s) in RCA: 294] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Kieran M. Lynch
- School of Food and Nutritional Sciences; University College Cork; College Road Cork Ireland
| | - Eric J. Steffen
- School of Food and Nutritional Sciences; University College Cork; College Road Cork Ireland
| | - Elke K. Arendt
- School of Food and Nutritional Sciences; University College Cork; College Road Cork Ireland
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14
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Hejna A, Kosmela P, Kopczynska M, Haponiuk J, Piszczyk L. Microwave Assisted Liquefaction with Crude Glycerol as a Potential Method of Brewer’s Spent Grain Utilization. CHEMISTRY & CHEMICAL TECHNOLOGY 2016. [DOI: 10.23939/chcht10.04.445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Brewer’s spent grain was applied as a low-cost industrial type of lignocellulose biomass in a liquefaction process with crude glycerol. Influence of the reaction time and solvent:biomass ratio on the efficiency of the process, chemical structure and basic properties of obtained biopolyols was analyzed. Spectroscopic studies of the prepared polyols and solid residues shed light on the biomass degradation mechanism through application of microwaves and further reaction of degradation products with solvent particles.
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15
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Pérez-Rodríguez N, Moreira CD, Torrado Agrasar A, Domínguez JM. Feruloyl esterase production by Aspergillus terreus CECT 2808 and subsequent application to enzymatic hydrolysis. Enzyme Microb Technol 2016; 91:52-8. [PMID: 27444329 DOI: 10.1016/j.enzmictec.2016.05.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/26/2016] [Accepted: 05/31/2016] [Indexed: 11/18/2022]
Abstract
Ferulic acid esterases (FAE) were produced by Aspergillus terreus CECT 2808 from vine trimming shoots (VTS) and corn cob. Later, the fungal extracts thus obtained were used to enzymatically release ferulic acid (FA) from both substrates. Our findings showed a higher FAE activity in the enzymatic extracts produced on corn cob (0.070±0.004U/mL). Nevertheless, the enzymatic extracts produced on VTS demonstrated a better performance for FA release from both corn cob (2.05±0.01mg/g) and VTS (0.19±0.003mg/g). This result was probably because of the higher xylanase/FAE ratio determined in VTS extract. Therefore, an additional assay was carried out by supplementing corn cob extract with a commercial xylanase to test the influence of FAE/xylanase ratio in FA release. The results revealed the relevance of the FAE/xylanase ratio for an optimal FA release.
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Affiliation(s)
- N Pérez-Rodríguez
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, SPAIN and Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
| | - C D Moreira
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, SPAIN and Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain; CEB-Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - A Torrado Agrasar
- Bromatology Group, Department of Analytical and Food Chemistry, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, Spain
| | - J M Domínguez
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo (Campus Ourense), As Lagoas s/n, 32004 Ourense, SPAIN and Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain.
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16
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Antioxidant phenolics and their microbial production by submerged and solid state fermentation process: A review. Trends Food Sci Technol 2016. [DOI: 10.1016/j.tifs.2016.04.007] [Citation(s) in RCA: 157] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Udatha DBRKG, Topakas E, Salazar M, Olsson L, Andersen MR, Panagiotou G. Deciphering the signaling mechanisms of the plant cell wall degradation machinery in Aspergillus oryzae. BMC SYSTEMS BIOLOGY 2015; 9:77. [PMID: 26573537 PMCID: PMC4647334 DOI: 10.1186/s12918-015-0224-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 10/28/2015] [Indexed: 12/30/2022]
Abstract
Background The gene expression and secretion of fungal lignocellulolytic enzymes are tightly controlled at the transcription level using independent mechanisms to respond to distinct inducers from plant biomass. An advanced systems-level understanding of transcriptional regulatory networks is required to rationally engineer filamentous fungi for more efficient bioconversion of different types of biomass. Results In this study we focused on ten chemically defined inducers to drive expression of cellulases, hemicellulases and accessory enzymes in the model filamentous fungus Aspergillus oryzae and shed light on the complex network of transcriptional activators required. The chemical diversity analysis of the inducers, based on 186 chemical descriptors calculated from the structure, resulted into three clusters, however, the global, metabolic and extracellular protein transcription of the A. oryzae genome were only partially explained by the chemical similarity of the enzyme inducers. Genes encoding enzymes that have attracted considerable interest such as cellobiose dehydrogenases and copper-dependent polysaccharide mono-oxygenases presented a substrate-specific induction. Several homology-model structures were derived using ab-initio multiple threading alignment in our effort to elucidate the interplay of transcription factors involved in regulating plant-deconstructing enzymes and metabolites. Systematic investigation of metabolite-protein interactions, using the 814 unique reactants involved in 2360 reactions in the genome scale metabolic network of A. oryzae, was performed through a two-step molecular docking against the binding pockets of the transcription factors AoXlnR and AoAmyR. A total of six metabolites viz., sulfite (H2SO3), sulfate (SLF), uroporphyrinogen III (UPGIII), ethanolamine phosphate (PETHM), D-glyceraldehyde 3-phosphate (T3P1) and taurine (TAUR) were found as strong binders, whereas the genes involved in the metabolic reactions that these metabolites appear were found to be significantly differentially expressed when comparing the inducers with glucose. Conclusions Based on our observations, we believe that specific binding of sulfite to the regulator of the cellulase gene expression, AoXlnR, may be the molecular basis for the connection of sulfur metabolism and cellulase gene expression in filamentous fungi. Further characterization and manipulation of the regulatory network components identified in this study, will enable rational engineering of industrial strains for improved production of the sophisticated set of enzymes necessary to break-down chemically divergent plant biomass. Electronic supplementary material The online version of this article (doi:10.1186/s12918-015-0224-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- D B R K Gupta Udatha
- The Norwegian Structural Biology Centre, Department of Chemistry, Faculty of Science and Technology, University of Tromsø, N-9037, Tromsø, Norway. .,Section for Genetics and Evolutionary Biology, Department of Biosciences, University of Oslo, Oslo, Norway.
| | - Evangelos Topakas
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens, 15780, Greece.
| | - Margarita Salazar
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden. .,Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden.
| | - Lisbeth Olsson
- Department of Chemical and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden. .,Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden.
| | - Mikael R Andersen
- Department of Systems Biology, Technical University of Denmark, Søltofts plads 223, DK-2800, Lyngby, Denmark.
| | - Gianni Panagiotou
- School of Biological Sciences, The University of Hong Kong, Kadoorie Biological Sciences Building, Hong Kong, China.
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Gopalan N, Rodríguez-Duran LV, Saucedo-Castaneda G, Nampoothiri KM. Review on technological and scientific aspects of feruloyl esterases: A versatile enzyme for biorefining of biomass. BIORESOURCE TECHNOLOGY 2015; 193:534-44. [PMID: 26159377 DOI: 10.1016/j.biortech.2015.06.117] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 06/22/2015] [Accepted: 06/23/2015] [Indexed: 05/11/2023]
Abstract
With increasing focus on sustainable energy, bio-refining from lignocellulosic biomass has become a thrust area of research. With most of the works being focused on biofuels, significant efforts are also being directed towards other value added products. Feruloyl esterases (EC. 3.1.1.73) can be used as a tool for bio-refining of lignocellulosic material for the recovery and purification of ferulic acid and related hydroxycinnamic acids ubiquitously found in the plant cell wall. More and more genes coding for feruloyl esterases have been mined out from various sources to allow efficient enzymatic release of ferulic acid and allied hydroxycinnamic acids (HCAs) from plant-based biomass. A sum up on enzymatic extraction of HCAs and its recovery from less explored agro residual by-products is still a missing link and this review brushes up the achieved landmarks so far in this direction and also covers a detailed patent search on this biomass refining enzyme.
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Affiliation(s)
- Nishant Gopalan
- Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), CSIR, New Delhi, India
| | - L V Rodríguez-Duran
- Metropolitan Autonomous University Campus Iztapalapa, Biotechnology Department, Mexico City, Iztapalapa Z.C. 09340, Mexico
| | - G Saucedo-Castaneda
- Metropolitan Autonomous University Campus Iztapalapa, Biotechnology Department, Mexico City, Iztapalapa Z.C. 09340, Mexico
| | - K Madhavan Nampoothiri
- Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India; Academy of Scientific and Innovative Research (AcSIR), CSIR, New Delhi, India.
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An organic solvent-tolerant phenolic acid decarboxylase from Bacillus licheniformis for the efficient bioconversion of hydroxycinnamic acids to vinyl phenol derivatives. Appl Microbiol Biotechnol 2014; 99:5071-81. [DOI: 10.1007/s00253-014-6313-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 12/03/2014] [Accepted: 12/09/2014] [Indexed: 10/24/2022]
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20
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Yu XH, Gu ZX. Direct production of feruloyl oligosaccharides and hemicellulase inducement and distribution in a newly isolated Aureobasidium pullulans strain. World J Microbiol Biotechnol 2013; 30:747-55. [PMID: 24078110 DOI: 10.1007/s11274-013-1503-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 09/20/2013] [Indexed: 10/26/2022]
Abstract
Studies were carried out to screen and identify strains that are able to directly produce ferulic oligosaccharides (FOs) from wheat bran (WB). The inducement and distribution of hemicellulases from strain 2012, which was identified as a non-melanin secreting strain of Aureobasidium pullulans (A. pullulans), were also determined. In a 60 g/L WB solution, A. pullulans could produce 545 nmol/L FOs, 64.12 IU/mL xylanase and 0.14 IU/mL ferulic acid esterase (FAE). A. pullulans was cultivated in media with WB, glucose, xylose, sucrose, lactose or xylan as the carbon source, and hemicellulases were mainly induced by xylan and WB and inhibited by glucose and sucrose. Xylanase and FAE were mainly present in the culture filtrate, xylosidase in the hyphal filaments and arabinofuranosidase was a membrane-bound enzyme. The yield of FOs was positively correlated to the hemicellulases activity, and significantly positively (P < 0.05) correlated to the xylanase activity (r = 0.992).
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Debeire P, Khoune P, Jeltsch JM, Phalip V. Product patterns of a feruloyl esterase from Aspergillus nidulans on large feruloyl-arabino-xylo-oligosaccharides from wheat bran. BIORESOURCE TECHNOLOGY 2012; 119:425-8. [PMID: 22770893 DOI: 10.1016/j.biortech.2012.01.185] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 01/23/2012] [Accepted: 01/25/2012] [Indexed: 05/11/2023]
Abstract
A purified feruloyl esterase (EC 3.1.1.73) from Aspergillus nidulans produced in Pichia pastoris was used to study the de-esterification of large feruloyl oligosaccharides consisting of 4 to 20 pentose residues and (xylose plus arabinose) and one ferulic acid residue. The feruloyl oligosaccharides were prepared from total oligosaccharidic hydrolysates from wheat bran treated with a purified endoxylanase from Thermobacillus xylanilyticus. The feruloyl esterase showed similar specific activity but an affinity about 3.5-fold higher towards feruloyl oligosaccharides than towards methyl ferulate. Mass spectrometry analysis of the products after long-term enzymatic hydrolyses showed that the esterase was able to hydrolyze the largest feruloyl oligosaccharides and therefore could act alone on feruloyled xylans. Consequently, the feruloyl esterase from A. nidulans could be useful for the enzymatic deconstruction of xylans in plant cell walls.
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Affiliation(s)
- Philippe Debeire
- Laboratory of Polymers Engineering for High Technologies (LIPHT), Strasbourg University, ECPM, 25 rue Becquerel, 67087 Strasbourg Cedex 2, France
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Szwajgier D, Waśko A, Targoński Z, Niedźwiadek M, Bancarzewska M. The Use of a Novel Ferulic Acid Esterase from Lactobacillus acidophilus K1 for the Release of Phenolic Acids from Brewer's Spent Grain. JOURNAL OF THE INSTITUTE OF BREWING 2012. [DOI: 10.1002/j.2050-0416.2010.tb00434.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Cheng F, Sheng J, Cai T, Jin J, Liu W, Lin Y, Du Y, Zhang M, Shen L. A protease-insensitive feruloyl esterase from China Holstein cow rumen metagenomic library: expression, characterization, and utilization in ferulic acid release from wheat straw. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:2546-2553. [PMID: 22352374 DOI: 10.1021/jf204556u] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A metagenomic library of China Holstein cow rumen microbes was constructed and screened for novel gene cluster. A novel feruloyl esterase (FAE) gene was identified with a length of 789 bp and encoded a protein displaying 56% identity to known esterase sequences. The gene was functionally expressed in Escherichia coli BL21 (DE3), and the total molecular weight of the recombined protein was 32.4 kDa. The purified enzyme showed a broad specificity against the four methyl esters of hydroxycinnamic acids and high activity (259.5 U/mg) to methyl ferulate at optimum conditions (pH 8.0, 40 °C). High thermal and pH stability were also observed. Moreover, the enzyme showed broad resistance to proteases. FAE-SH1 can enhance the release of ferulic acid from wheat straw with cellulase, β-1,4-endoxylanase, β-1,3-glucanase, and pectase. These features suggest FAE-SH1 as a good candidate to enhance biomass degradation and improve the health effects of food and forage.
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Affiliation(s)
- Fansheng Cheng
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
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Van Dyk JS, Pletschke BI. A review of lignocellulose bioconversion using enzymatic hydrolysis and synergistic cooperation between enzymes--factors affecting enzymes, conversion and synergy. Biotechnol Adv 2012; 30:1458-80. [PMID: 22445788 DOI: 10.1016/j.biotechadv.2012.03.002] [Citation(s) in RCA: 477] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 02/10/2012] [Accepted: 03/06/2012] [Indexed: 02/04/2023]
Abstract
Lignocellulose is a complex substrate which requires a variety of enzymes, acting in synergy, for its complete hydrolysis. These synergistic interactions between different enzymes have been investigated in order to design optimal combinations and ratios of enzymes for different lignocellulosic substrates that have been subjected to different pretreatments. This review examines the enzymes required to degrade various components of lignocellulose and the impact of pretreatments on the lignocellulose components and the enzymes required for degradation. Many factors affect the enzymes and the optimisation of the hydrolysis process, such as enzyme ratios, substrate loadings, enzyme loadings, inhibitors, adsorption and surfactants. Consideration is also given to the calculation of degrees of synergy and yield. A model is further proposed for the optimisation of enzyme combinations based on a selection of individual or commercial enzyme mixtures. The main area for further study is the effect of and interaction between different hemicellulases on complex substrates.
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Affiliation(s)
- J S Van Dyk
- Department of Biochemistry, Microbiology and Biotechnology, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa
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Mateo Anson N, Hemery YM, Bast A, Haenen GRMM. Optimizing the bioactive potential of wheat bran by processing. Food Funct 2012; 3:362-75. [PMID: 22336890 DOI: 10.1039/c2fo10241b] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Nuria Mateo Anson
- University of Maastricht, PO Box 616, 6200 MD, Maastricht, The Netherlands
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Wu M, Abokitse K, Grosse S, Leisch H, Lau PCK. New Feruloyl Esterases to Access Phenolic Acids from Grass Biomass. Appl Biochem Biotechnol 2011; 168:129-43. [DOI: 10.1007/s12010-011-9359-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 08/30/2011] [Indexed: 11/24/2022]
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Huang YC, Chen YF, Chen CY, Chen WL, Ciou YP, Liu WH, Yang CH. Production of ferulic acid from lignocellulolytic agricultural biomass by Thermobifida fusca thermostable esterase produced in Yarrowia lipolytica transformant. BIORESOURCE TECHNOLOGY 2011; 102:8117-8122. [PMID: 21683590 DOI: 10.1016/j.biortech.2011.05.062] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2011] [Revised: 05/20/2011] [Accepted: 05/22/2011] [Indexed: 05/30/2023]
Abstract
A gene (axe) encoding the AXE thermostable esterase in Thermobifida fusca NTU22 was cloned into a Yarrowia lipolytica P01g host strain. Recombinant expression resulted in extracellular esterase production at levels as high as 70.94 U/ml in Hinton flask culture broth, approximately 140 times higher than observed in a Pichia pastoris expression system. After 72 h of fermentation by the Y. lipolytica transformant in the fed-batch fermentor, the fermentation broth accumulated 41.11 U/ml esterase activity. Rice bran, wheat bran, bagasse and corncob were used as hydrolysis substrates for the esterase, with corncob giving the best ferulic acid yield. The corncob was incubated with T. fusca xylanase (Tfx) for 12h and then with the AXE esterase for an additional 12h. Ferulic acid accumulated to 396 μM in the culture broth, a higher concentration than with esterase alone or with Tfx and esterase together for 24 h.
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Affiliation(s)
- Yu-Chun Huang
- Department of Cosmetic Science, Providence University, Taichung 43301, Taiwan
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Thermostable feruloyl esterase for the bioproduction of ferulic acid from triticale bran. Appl Microbiol Biotechnol 2010; 87:195-203. [DOI: 10.1007/s00253-010-2441-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 01/04/2010] [Accepted: 01/05/2010] [Indexed: 10/19/2022]
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