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Xie Z, Dan M, Zhao G, Wang D. Recent advances in microbial high-value utilization of brewer's spent grain. BIORESOURCE TECHNOLOGY 2024; 408:131197. [PMID: 39097237 DOI: 10.1016/j.biortech.2024.131197] [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: 05/17/2024] [Revised: 07/26/2024] [Accepted: 07/31/2024] [Indexed: 08/05/2024]
Abstract
Mitigating the adverse impacts of agricultural and industrial by-products on human populations and the environment is essential. It is crucial to continually explore methods to upgrade and reengineer these by-products. Brewer's Spent Grain (BSG), the primary by-product of the beer brewing process, constitutes approximately 85% of these by-products. Its high moisture content and rich nutritional profile make BSG a promising candidate for microbial utilization. Consequently, valorizing high-yield, low-cost BSG through microbial fermentation adds significant value. This paper provides a comprehensive overview of two valorization pathways for BSG via microbial processing, tailored to the desired end products: utilizing fermented BSG as a nutritional supplement in human or animal diets, or cultivating edible fungi using BSG as a substrate. The review also explores the microbial fermentation of BSG to produce valuable metabolites, laying a theoretical foundation for its high-value utilization.
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Affiliation(s)
- Zhengjie Xie
- Yibin Academy of Southwest University, Yibin 644000, China; College of Food Science, Southwest University, Chongqing 400715, China
| | - Meiling Dan
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Guohua Zhao
- College of Food Science, Southwest University, Chongqing 400715, China
| | - Damao Wang
- Yibin Academy of Southwest University, Yibin 644000, China; College of Food Science, Southwest University, Chongqing 400715, China.
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Zeko-Pivač A, Tišma M, Žnidaršič-Plazl P, Kulisic B, Sakellaris G, Hao J, Planinić M. The Potential of Brewer’s Spent Grain in the Circular Bioeconomy: State of the Art and Future Perspectives. Front Bioeng Biotechnol 2022; 10:870744. [PMID: 35782493 PMCID: PMC9247607 DOI: 10.3389/fbioe.2022.870744] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 05/17/2022] [Indexed: 12/30/2022] Open
Abstract
Brewer’s spent grain (BSG) accounts for approximately 85% of the total mass of solid by-products in the brewing industry and represents an important secondary raw material of future biorefineries. Currently, the main application of BSG is limited to the feed and food industry. There is a strong need to develop sustainable pretreatment and fractionation processes to obtain BSG hydrolysates that enable efficient biotransformation into biofuels, biomaterials, or biochemicals. This paper aims to provide a comprehensive insight into the availability of BSG, chemical properties, and current and potential applications juxtaposed with the existing and emerging markets of the pyramid of bio-based products in the context of sustainable and circular bioeconomy. An economic evaluation of BSG for the production of highly valuable products is presented in the context of sustainable and circular bioeconomy targeting the market of Central and Eastern European countries (BIOEAST region).
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Affiliation(s)
- Anđela Zeko-Pivač
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Marina Tišma
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
- *Correspondence: Marina Tišma,
| | - Polona Žnidaršič-Plazl
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia
| | | | | | - Jian Hao
- Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Pudong, China
| | - Mirela Planinić
- Faculty of Food Technology Osijek, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
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Arabinoxylans Release from Brewers’ Spent Grain Using Extrusion and Solid-State Fermentation with Fusarium oxysporum and the Antioxidant Capacity of the Extracts. Foods 2022; 11:foods11101415. [PMID: 35626985 PMCID: PMC9140831 DOI: 10.3390/foods11101415] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 01/27/2023] Open
Abstract
Brewers’ spent grain (BSG) is the most abundant byproduct generated from the beer-brewing process. BSG is a material rich in hemicellulose, composed of arabinoxylans (AX). However, the high crosslinking of this material causes low availability of AX, for which it is necessary to apply different treatments. The objective of this research is to increase the release of arabinoxylans through solid-state fermentation with Fusarium oxysporum f. sp. lycopersici using extruded brewery spent grain. First, the BSG is subjected to two types of physical treatments: extrusion at 20% moisture, 200 rpm and 50 °C (BSGe), and blade milling (BSGm). The chemical composition is determined for each sample (BSG, BSGe and BSGm). Subsequently, the solid-state fermentation process (SSF) is carried out on each sample. The fermentation kinetics at 30 °C are monitored for 7 days. Once the SSF concludes, AX are extracted, and the purity of AX is determined by the phloroglucinol colorimetric assay. Finally, the total phenolic compounds, phenolic acids and antioxidant capacity by DPPH are quantified. No significant differences (p ≥ 0.05) in the protein, lipid, ash or total dietary fiber contents are found among the samples. No significant difference (p ≥ 0.05) in the content of soluble fiber is found, although BSGe and BSGm have higher values than BSG. On the other hand, the yields of soluble AX exhibit significant differences (p ≤ 0.05) among nonfermented samples (BSG, 0.03%; BSGm, 0.53%; BSGe, 0.70%) and with SSF (BSG, 2.95%; BSGm, 6.24%; and BSGe, 9.58%). In addition, the contents of free phenolic compounds and free phenolic acids and the percent inhibition of free extracts by 2,2-diphenyl-1-picrylhydrazyl (DPPH) differ significantly (p ≤ 0.05) between samples subjected to SSF and nonfermented samples. Therefore, extrusion and SSF treatment increase AX release from BSG as well as the antioxidant capacity of the extracts.
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Fernandes H, Moyano F, Castro C, Salgado J, Martínez F, Aznar M, Fernandes N, Ferreira P, Gonçalves M, Belo I, Oliva-Teles A, Peres H. Solid-state fermented brewer's spent grain enzymatic extract increases in vitro and in vivo feed digestibility in European seabass. Sci Rep 2021; 11:22946. [PMID: 34824341 PMCID: PMC8617204 DOI: 10.1038/s41598-021-02393-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 11/09/2021] [Indexed: 11/23/2022] Open
Abstract
Brewer's spent grain (BSG) is the largest by-product originated from the brewery industry with a high potential for producing carbohydrases by solid-state fermentation. This work aimed to test the efficacy of a carbohydrases-rich extract produced from solid-state fermentation of BSG, to enhance the digestibility of a plant-based diet for European seabass (Dicentrarchus labrax). First, BSG was fermented with A. ibericus to obtain an aqueous lyophilized extract (SSF-BSG extract) and incorporated in a plant-based diet at increasing levels (0-control; 0.1%, 0.2%, and 0.4%). Another diet incorporating a commercial carbohydrases-complex (0.04%; Natugrain; BASF) was formulated. Then, all diets were tested in in vitro and in vivo digestibility assays. In vitro assays, simulating stomach and intestine digestion in European seabass, assessed dietary phosphorus, phytate phosphorus, carbohydrates, and protein hydrolysis, as well as interactive effects between fish enzymes and dietary SSF-BSG extract. After, an in vivo assay was carried out with European seabass juveniles fed selected diets (0-control; 0.1%, and 0.4%). In vitro digestibility assays showed that pentoses release increased 45% with 0.4% SSF-BSG extract and 25% with Natugrain supplemented diets, while amino acids release was not affected. A negative interaction between endogenous fish enzymes and SSF-BSG extract was observed in both diets. The in vivo digestibility assay corroborated in vitro data. Accordingly, the dietary supplementation with 0.4% SSF-BSG increased the digestibility of dry matter, starch, cellulose, glucans, and energy and did not affect protein digestibility. The present work showed the high potential of BSG to produce an added-value functional supplement with high carbohydrases activity and its potential contribution to the circular economy by improving the nutritional value of low-cost and sustainable ingredients that can be included in aquafeeds.
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Affiliation(s)
- Helena Fernandes
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal.
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Matosinhos, Portugal.
| | - Francisco Moyano
- Department of Biology and Geology, University of Almería, Almería, Spain
| | - Carolina Castro
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal
| | - José Salgado
- Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Francisca Martínez
- Department of Biology and Geology, University of Almería, Almería, Spain
| | - María Aznar
- Department of Biology and Geology, University of Almería, Almería, Spain
| | - Nelson Fernandes
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal
| | - Patrícia Ferreira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Matosinhos, Portugal
| | - Margarida Gonçalves
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal
| | - Isabel Belo
- Centre of Biological Engineering (CEB), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Aires Oliva-Teles
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Matosinhos, Portugal
| | - Helena Peres
- Department of Biology, Faculty of Sciences of University of Oporto (FCUP), Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Matosinhos, Portugal
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Marcus A, Fox G. Fungal Biovalorization of a Brewing Industry Byproduct, Brewer's Spent Grain: A Review. Foods 2021; 10:2159. [PMID: 34574269 PMCID: PMC8465358 DOI: 10.3390/foods10092159] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 11/17/2022] Open
Abstract
The beer industry is a major producer of solid waste globally, primarily in the form of brewer's spent grain (BSG), which due to its low value has historically been diverted to livestock as feed or to landfills. However, its high moisture content and chemical composition positions BSG as an ideal candidate for further processing with microbial fermentation. Recent research has focused on filamentous fungi and the ability of some species therein to degrade the predominant recalcitrant cellulolignin components of BSG to produce valuable compounds. Many species have been investigated to biovalorize this waste stream, including those in the genuses Aspergillus, Penicillium, Rhyzopus, and Trichoderma, which have been used to produce a wide array of highly valuable enzymes and other functional compounds, and to increase the nutritional value of BSG as an animal feed. This review of recent developments in the application of filamentous fungi for the valorization of BSG discusses the biochemical makeup of BSG, the biological mechanisms underlying fungi's primacy to this application, and the current applications of fungi in this realm.
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Affiliation(s)
| | - Glen Fox
- Food Science and Technology Department, University of California, One Shields Ave, Davis, CA 95616, USA;
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Puligundla P, Mok C. Recent advances in biotechnological valorization of brewers' spent grain. Food Sci Biotechnol 2021; 30:341-353. [PMID: 33868745 DOI: 10.1007/s10068-021-00900-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 11/28/2022] Open
Abstract
Brewers' spent grain (BSG) is the most abundant by-product of beer-brewing. BSG is rich in nutrients such as protein, fiber, minerals, and vitamins, and therefore it is conventionally used as low-cost animal feed. On the other hand, alternative utilization of BSG has gained increased attention during recent years due to technological progress in its processing and the emergence of the concept of circular economy. The valorization of BSG through biotechnological approaches is environmentally friendly and sustainable. This review was focused on recent advancements in the conversion of BSG into value-added products, including bioenergy (ethanol, butanol, hydrogen, biodiesel, and biogas), organic acids, enzymes, xylitol, oligosaccharides, and single cell protein, via biotechnological approaches. In addition, the potential applications of BSG as immobilization matrices in bioprocesses have been reviewed.
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Affiliation(s)
- Pradeep Puligundla
- Department of Food Science and Biotechnology, Gachon University, Seongnam-si, Republic of Korea
| | - Chulkyoon Mok
- Department of Food Science and Biotechnology, Gachon University, Seongnam-si, Republic of Korea
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Costa RDS, de Almeida SS, Cavalcanti EDC, Freire DMG, Moura-Nunes N, Monteiro M, Perrone D. Enzymes produced by solid state fermentation of agro-industrial by-products release ferulic acid in bioprocessed whole-wheat breads. Food Res Int 2021; 140:109843. [PMID: 33648166 DOI: 10.1016/j.foodres.2020.109843] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 10/01/2020] [Accepted: 10/20/2020] [Indexed: 11/30/2022]
Abstract
Solid-state fermentation (SSF) presents low cost and the possibility of adding value to waste by generating products rich in enzymes. The production of enzymes by SSF and its application in bakery have been previously reported separately in the literature. However, very few studies combine both approaches to evaluate the feasibility of applying enzymes produced by SSF to bread processing. The objective of this study was to use cocoa bean shell (CBS), wheat bran (WB) and brewer's spent grain (BSG) for enzyme production by SSF, and to evaluate their addition in breads. Three breads were produced: control bread (CB), bioprocessed bread added with fermented wheat bran (WBB) and bioprocessed bread added with fermented BSG (BSGB). Feruloyl esterase highest activities were 1,730 mU/g for WB fermented for 24 h and 1,128 mU/g for BSG fermented for 72 h. Xylanase highest activities were 547.9 U/g for BSG fermented for 48 h and 868.1 U/g for WB fermented for 72 h. CBS showed the lowest enzymatic activities. Bioprocessing breads with fermented WB and BSG led to an increase in soluble ferulic acid of 159% and 198%, respectively. The combination of SSF enzyme production and bread enzymatic bioprocessing strategies proved to be an effective green option for the valorization of agro-industrial by-products and the production of breads with enhanced ferulic acid content.
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Affiliation(s)
- Rodrigo Dos Santos Costa
- Laboratório de Bioquímica Nutricional e de Alimentos, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 528A, 21941-909 Rio de Janeiro, Brazil; Laboratório de Biotecnologia Microbiana, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 549-1, 21941-909 Rio de Janeiro, Brazil.
| | - Suellen Silva de Almeida
- Laboratório de Bioquímica Nutricional e de Alimentos, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 528A, 21941-909 Rio de Janeiro, Brazil.
| | - Elisa d'Avila Costa Cavalcanti
- Laboratório de Biotecnologia Microbiana, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 549-1, 21941-909 Rio de Janeiro, Brazil.
| | - Denise Maria Guimarães Freire
- Laboratório de Biotecnologia Microbiana, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 549-1, 21941-909 Rio de Janeiro, Brazil.
| | - Nathália Moura-Nunes
- Laboratory of Food Science, Nutrition Institute, Rio de Janeiro State University, R. São Francisco Xavier, 524, Pav. João Lyra Filho, 12° andar, Bloco F, sala 12.143, 20550-900 Rio de Janeiro, Brazil.
| | - Mariana Monteiro
- Laboratório de Alimentos Funcionais, Nutrition Institute, Federal University of Rio de Janeiro, Av. Carlos Chagas Filho, 373, CCS, Bloco J, 2° andar, sala 16, 21941-902 Rio de Janeiro, Brazil.
| | - Daniel Perrone
- Laboratório de Bioquímica Nutricional e de Alimentos, Biochemistry Department, Chemistry Institute, Federal University of Rio de Janeiro, Av. Athos da Silveira Ramos 149, CT, Bloco A, sala 528A, 21941-909 Rio de Janeiro, Brazil.
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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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Lao EJ, Dimoso N, Raymond J, Mbega ER. The prebiotic potential of brewers’ spent grain on livestock’s health: a review. Trop Anim Health Prod 2020; 52:461-472. [DOI: 10.1007/s11250-019-02120-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 10/16/2019] [Indexed: 01/05/2023]
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10
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An Insight into Fungal Cellulases and Their Industrial Applications. Fungal Biol 2019. [DOI: 10.1007/978-3-030-14726-6_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Solid-state cultivation of recombinant Aspergillus nidulans to co-produce xylanase, arabinofuranosidase, and xylooligosaccharides from soybean fibre. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2018. [DOI: 10.1016/j.bcab.2018.05.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Abstract
Over the past few years Penicillium brasilianum has been isolated from many different environmental sources as soil isolates, plant endophytes and onion pathogen. All investigated strains share a great ability to produce bioactive secondary metabolites. Different authors have investigated this great capability and here we summarize the metabolic potential and the biological activities related to P. brasilianum’s metabolites with diverse structures. They include secondary metabolites of an alkaloid nature, i.e., 2,5-diketopiperazines, cyclodepsipeptides, meroterpenoids and polyketides. Penicillium brasilianum is also described as a great source of enzymes with biotechnological application potential, which is also highlighted in this review. Additionally, this review will focus on several aspects of Penicillium brasilianum and interesting genomic insights.
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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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15
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Vine Trimming Shoots as Substrate for Ferulic Acid Esterases Production. Appl Biochem Biotechnol 2016; 181:813-826. [DOI: 10.1007/s12010-016-2251-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 09/13/2016] [Indexed: 11/26/2022]
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16
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Dilokpimol A, Mäkelä MR, Aguilar-Pontes MV, Benoit-Gelber I, Hildén KS, de Vries RP. Diversity of fungal feruloyl esterases: updated phylogenetic classification, properties, and industrial applications. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:231. [PMID: 27795736 PMCID: PMC5084320 DOI: 10.1186/s13068-016-0651-6] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 10/18/2016] [Indexed: 05/08/2023]
Abstract
Feruloyl esterases (FAEs) represent a diverse group of carboxyl esterases that specifically catalyze the hydrolysis of ester bonds between ferulic (hydroxycinnamic) acid and plant cell wall polysaccharides. Therefore, FAEs act as accessory enzymes to assist xylanolytic and pectinolytic enzymes in gaining access to their site of action during biomass conversion. Their ability to release ferulic acid and other hydroxycinnamic acids from plant biomass makes FAEs potential biocatalysts in a wide variety of applications such as in biofuel, food and feed, pulp and paper, cosmetics, and pharmaceutical industries. This review provides an updated overview of the knowledge on fungal FAEs, in particular describing their role in plant biomass degradation, diversity of their biochemical properties and substrate specificities, their regulation and conditions needed for their induction. Furthermore, the discovery of new FAEs using genome mining and phylogenetic analysis of current publicly accessible fungal genomes will also be presented. This has led to a new subfamily classification of fungal FAEs that takes into account both phylogeny and substrate specificity.
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Affiliation(s)
- Adiphol Dilokpimol
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584CT Utrecht, The Netherlands
| | - Miia R. Mäkelä
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland
| | - Maria Victoria Aguilar-Pontes
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584CT Utrecht, The Netherlands
| | - Isabelle Benoit-Gelber
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584CT Utrecht, The Netherlands
| | - Kristiina S. Hildén
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland
| | - Ronald P. de Vries
- Fungal Physiology, CBS-KNAW Fungal Biodiversity Centre & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584CT Utrecht, The Netherlands
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of Helsinki, P.O. Box 56, 00014 Helsinki, Finland
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Brewer’s spent grain: source of value-added polysaccharides for the food industry in reference to the health claims. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2461-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Udatha DBRKG, Mapelli V, Panagiotou G, Olsson L. Common and distant structural characteristics of feruloyl esterase families from Aspergillus oryzae. PLoS One 2012; 7:e39473. [PMID: 22745763 PMCID: PMC3382194 DOI: 10.1371/journal.pone.0039473] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Accepted: 05/21/2012] [Indexed: 11/18/2022] Open
Abstract
Background Feruloyl esterases (FAEs) are important biomass degrading accessory enzymes due to their capability of cleaving the ester links between hemicellulose and pectin to aromatic compounds of lignin, thus enhancing the accessibility of plant tissues to cellulolytic and hemicellulolytic enzymes. FAEs have gained increased attention in the area of biocatalytic transformations for the synthesis of value added compounds with medicinal and nutritional applications. Following the increasing attention on these enzymes, a novel descriptor based classification system has been proposed for FAEs resulting into 12 distinct families and pharmacophore models for three FAE sub-families have been developed. Methodology/Principal Findings The feruloylome of Aspergillus oryzae contains 13 predicted FAEs belonging to six sub-families based on our recently developed descriptor-based classification system. The three-dimensional structures of the 13 FAEs were modeled for structural analysis of the feruloylome. The three genes coding for three enzymes, viz., A.O.2, A.O.8 and A.O.10 from the feruloylome of A. oryzae, representing sub-families with unknown functional features, were heterologously expressed in Pichia pastoris, characterized for substrate specificity and structural characterization through CD spectroscopy. Common feature-based pharamacophore models were developed according to substrate specificity characteristics of the three enzymes. The active site residues were identified for the three expressed FAEs by determining the titration curves of amino acid residues as a function of the pH by applying molecular simulations. Conclusions/Significance Our findings on the structure-function relationships and substrate specificity of the FAEs of A. oryzae will be instrumental for further understanding of the FAE families in the novel classification system. The developed pharmacophore models could be applied for virtual screening of compound databases for short listing the putative substrates prior to docking studies or for post-processing docking results to remove false positives. Our study exemplifies how computational predictions can complement to the information obtained through experimental methods.
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Affiliation(s)
- D. B. R. K. Gupta Udatha
- Department of Chemical and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, Gothenburg, Sweden
| | - Valeria Mapelli
- Department of Chemical and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, Gothenburg, Sweden
| | - Gianni Panagiotou
- Department of Chemical and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, Gothenburg, Sweden
- Center for Biological Sequence Analysis, Department of Systems Biology, Technical University of Denmark, Lyngby, Denmark
- Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Hørsholm, Denmark
| | - Lisbeth Olsson
- Department of Chemical and Biological Engineering, Industrial Biotechnology, Chalmers University of Technology, Gothenburg, Sweden
- * E-mail:
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do Nascimento RP, Junior NA, Coelho RRR. Brewer's spent grain and corn steep liquor as alternative culture medium substrates for proteinase production by Streptomyces malaysiensis AMT-3. Braz J Microbiol 2011; 42:1384-9. [PMID: 24031767 PMCID: PMC3768733 DOI: 10.1590/s1517-838220110004000020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Revised: 02/08/2011] [Accepted: 06/06/2011] [Indexed: 11/30/2022] Open
Abstract
Brewer’s spent grain and corn steep liquor or yeast extract were used as the sole organic forms for proteinase production by Streptomyces malaysiensis in submerged fermentation. The influence of the C and N concentrations, as well as the incubation periods, were assessed. Eight proteolytic bands were detected through gelatin-gel-electrophoresis in the various extracts obtained from the different media and after different incubation periods, with apparent molecular masses of 20, 35, 43, 50, 70, 100, 116 and 212 kDa. The results obtained suggest an opportunity for exploring this alternative strategy for proteinases production by actinomycetes, using BSG and CSL as economically feasible substrates.
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Affiliation(s)
- Rodrigo Pires do Nascimento
- Centro de Ciências Agrárias, Ambientais e Biológicas, Universidade Federal do Recôncavo da Bahia , Cruz das Almas, BA , Brasil
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Joshi C, Khare SK. Utilization of deoiled Jatropha curcas seed cake for production of xylanase from thermophilic Scytalidium thermophilum. BIORESOURCE TECHNOLOGY 2011; 102:1722-1726. [PMID: 20855195 DOI: 10.1016/j.biortech.2010.08.070] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Revised: 08/17/2010] [Accepted: 08/19/2010] [Indexed: 05/29/2023]
Abstract
Jatropha curcas is a major biodiesel crop. Large amount of deoiled cake is generated as by-product during biodiesel production from its seeds. Deoiled J. curcas seed cake was assessed as substrate for the production of xylanase from thermophilic fungus Scytalidium thermophilum by solid-state fermentation. The seed cake was efficiently utilized by S. thermophilum for its growth during which it produced good amount of heat stable extracellular xylanase. The solid-state fermentation conditions were optimized for maximum xylanase production. Under the optimized conditions viz. deoiled seed cake supplemented with 1% oat-spelt xylan, adjusted to pH 9.0, moisture content 1:3 w/v, inoculated with 1×10(6) spores per 5 g cake and incubated at 45 °C, 1455 U xylanase/g deoiled seed cake was obtained. The xylanase was useful in biobleaching of paper pulp. Solid-state fermentation of deoiled cake appears a potentially viable approach for its effective utilization.
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Affiliation(s)
- Chetna Joshi
- Enzyme and Microbial Biochemistry Lab, Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India
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21
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Terrasan CRF, Temer B, Duarte MCT, Carmona EC. Production of xylanolytic enzymes by Penicillium janczewskii. BIORESOURCE TECHNOLOGY 2010; 101:4139-4143. [PMID: 20122825 DOI: 10.1016/j.biortech.2010.01.011] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 01/05/2010] [Accepted: 01/05/2010] [Indexed: 05/28/2023]
Abstract
The production of extracellular xylanase, beta-xylosidase and alpha-l-arabinofuranosidase by the mesophilic fungus Penicillium janczewskii under submerged cultivation was investigated with different carbon sources. Optimization steps included studies of carbon source concentration, temperature of cultivation and initial pH of culture medium. The production of these enzymes was increased two times when cultures were supplemented with brewer's spent grain at 2% concentration, pH 6.0 and carried out at 25 degrees C. Under these optimized conditions were obtained xylanase activity of 15.19UmL(-1) and 23.54Umgprot(-1), beta-xylosidase activity of 0.16UmL(-1) and 0.25Umgprot(-1) and alpha-l-arabinofuranosidase activity of 0.67UmL(-1) and 1.04Umgprot(-1). Brewer's spent grain is a promising substrate for P. janczewskii growth and xylanolytic enzyme production, since it is the main by-product from the brewing industry, available in large amounts and at low-cost in many countries.
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Affiliation(s)
- César Rafael Fanchini Terrasan
- Biochemistry and Microbiology Department, Biosciences Institute, UNESP, São Paulo State University, PO 155, Rio Claro, SP, CEP 13506-900, Brazil.
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22
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Xiros C, Moukouli M, Topakas E, Christakopoulos P. Factors affecting ferulic acid release from Brewer's spent grain by Fusarium oxysporum enzymatic system. BIORESOURCE TECHNOLOGY 2009; 100:5917-5921. [PMID: 19592240 DOI: 10.1016/j.biortech.2009.06.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Revised: 06/04/2009] [Accepted: 06/05/2009] [Indexed: 05/28/2023]
Abstract
In this study, the factors affecting ferulic acid (FA) release from Brewer's spent grain (BSG), by the crude enzyme extract of Fusarium oxysporum were investigated. In order to evaluate the importance of the multienzyme preparation on FA release, the synergistic action of feruloyl esterase (FAE, FoFaeC-12213) and xylanase (Trichoderma longibrachiatum M3) monoenzymes was studied. More than double amount of FA release (1 mg g(-1) dry BSG) was observed during hydrolytic reactions by the crude enzyme extract compared to hydrolysis by the monoenzymes (0.37 mg g(-1) dry BSG). The protease content of the crude extract and the inhibitory effect of FA as an end-product were also evaluated concerning their effect on FA release. The protease treatment prior to hydrolysis by monoenzymes enhanced FA release about 100%, while, for the first time in literature, FA in solution found to have a significant inhibitory effect on FAE activity and on total FA release.
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Affiliation(s)
- Charilaos Xiros
- BIOtechMASS Unit, Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 5 Iroon Polytechniou Str., Zografou Campus, Athens 15780, Greece
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Nascimento R, Junior N, Pereira Jr N, Bon E, Coelho R. Brewer’s spent grain and corn steep liquor as substrates for cellulolytic enzymes production byStreptomyces malaysiensis. Lett Appl Microbiol 2009; 48:529-35. [DOI: 10.1111/j.1472-765x.2009.02575.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zeng W, Chen HZ. Air pressure pulsation solid state fermentation of feruloyl esterase by Aspergillus niger. BIORESOURCE TECHNOLOGY 2009; 100:1371-1375. [PMID: 18929480 DOI: 10.1016/j.biortech.2008.08.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Revised: 08/17/2008] [Accepted: 08/19/2008] [Indexed: 05/26/2023]
Abstract
Air pressure pulsation solid state fermentation (APP-SSF) was applied to produce feruloyl esterase (FAE) by Aspergillus niger. With the optimization of some variables by orthogonal design, the optimal condition obtained was 0.2 MPa (gauge pressure) of high pressure intensity, 30 min of low pressure duration and 20s of high pressure duration. Based on the optimized condition, the APP-SSF achieved the reasonable enzyme yield of 881 mU/g at 48 h, which was 58% more than that by static solid state fermentation (static SSF) at 72 h. By comparison of two fermentation methods in temperature, O(2) and CO(2) concentration, and respiration intensity, it was concluded that APP-SSF enhanced heat and mass transfer of fermentation system and strengthened the metabolism of microorganisms. The APP-SSF had a greatly positive effect on FAE production by A. niger, by enhancing mass and heat transfer and activating growth and metabolism.
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Affiliation(s)
- W Zeng
- State Key Laboratory of Biochemistry, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China
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Antoine AA, Jacqueline D, Thonart P. Xylanase Production by Penicillium canescens on Soya Oil Cake in Solid-State Fermentation. Appl Biochem Biotechnol 2009; 160:50-62. [DOI: 10.1007/s12010-008-8496-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Accepted: 12/15/2008] [Indexed: 10/21/2022]
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Xiros C, Topakas E, Katapodis P, Christakopoulos P. Hydrolysis and fermentation of brewer's spent grain by Neurospora crassa. BIORESOURCE TECHNOLOGY 2008; 99:5427-5435. [PMID: 18178432 DOI: 10.1016/j.biortech.2007.11.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2007] [Revised: 11/03/2007] [Accepted: 11/06/2007] [Indexed: 05/25/2023]
Abstract
In this study, the ethanol production by the mesophilic fungus Neurospora crassa from BG was studied and optimized concerning the induction of lignocellulose degrading enzymes and the production phase as well. The production of cellulolytic and hemicellulolytic enzymes was studied under solid-state cultivation (SSC). SSC in a laboratory horizontal bioreactor using the optimized medium, WS and BG in the ratio 1:1 and initial moisture level 61.5%, allowed the large scale production of the multienzymatic system. Similar yields with those from flasks experiments, as high as 1073,56,4.2,1.6,3.1,5.7 and 0.52 U g(-1) carbon source of xylanase, endoglucanase, cellobiohydrolase, beta-glucosidase, alpha-l-arabinofuranosidase, acetyl esterase and feruloyl esterase, respectively, were obtained. Chromogenic (fluorogenic) 4-methylumbelliferyl substrates were used to characterize the major activities of the multienzyme component, after the separation by isoelectric focusing (IEF) electrophoresis. Alkali pre-treated BG was used for ethanol production. A yield of about 74 g of ethanol kg(-1) dry BG (5,6 g L(-1)) was obtained under optimum conditions (aeration 0.1 vvm, pre-treatment with 1g NaOH 10 g(-1)dry BG).
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Affiliation(s)
- Charilaos Xiros
- Biotechnology Laboratory, School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou Strasse, Zografou Campus, 15700 Athens, Greece
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Mandalari G, Bisignano G, Lo Curto RB, Waldron KW, Faulds CB. Production of feruloyl esterases and xylanases by Talaromyces stipitatus and Humicola grisea var. thermoidea on industrial food processing by-products. BIORESOURCE TECHNOLOGY 2008; 99:5130-5133. [PMID: 17951057 DOI: 10.1016/j.biortech.2007.09.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2006] [Revised: 09/07/2007] [Accepted: 09/10/2007] [Indexed: 05/25/2023]
Abstract
Feruloyl esterase (FAE) and xylanase activities were detected in culture supernatants from Humicola grisea var. thermoidea and Talaromyces stipitatus grown on brewers' spent grain (BSG) and wheat bran (WB), two agro-industrial by-products. Maximum activities were detected from cultures of H. grisea grown at 150 rpm, with 16.9 U/ml and 9.1 U/ml of xylanase activity on BSG and WB, respectively. Maximum FAE activity was 0.47 U/ml and 0.33 U/ml on BSG and WB, respectively. Analysis of residual cell wall material after microbial growth shows the preferential solubilisation of arabinoxylan and cellulose, two main polysaccharides present in BSG and WB. The production of low-cost cell-wall-deconstructing enzymes on agro-industrial by-products could lead to the production of low-cost enzymes for use in the valorisation of food processing wastes.
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Affiliation(s)
- G Mandalari
- Sustainability of the Food Chain Exploitation Platform, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, United Kingdom
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Fazary AE, Ju YH. Feruloyl esterases as biotechnological tools: current and future perspectives. Acta Biochim Biophys Sin (Shanghai) 2007; 39:811-28. [PMID: 17989872 DOI: 10.1111/j.1745-7270.2007.00348.x] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Feruloyl esterases represent a diverse group of hydrolases catalyzing the cleavage and formation of ester bonds between plant cell wall polysaccharide and phenolic acid. They are widely distributed in plants and microorganisms. Besides lipases, a considerable number of microbial feruloyl esterases have also been discovered and overexpressed. This review summarizes the latest research on their classification, production, and biophysicochemical properties. Special emphasis is given to the importance of that type of enzyme and their related phenolic ferulic acid compound in biotechnological processes, and industrial and medicinal applications.
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Affiliation(s)
- Ahmed E Fazary
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106-07, Taiwan, China
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Panagiotou G, Olavarria R, Olsson L. Penicillium brasilianum as an enzyme factory; the essential role of feruloyl esterases for the hydrolysis of the plant cell wall. J Biotechnol 2007; 130:219-28. [PMID: 17544537 DOI: 10.1016/j.jbiotec.2007.04.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2007] [Revised: 04/04/2007] [Accepted: 04/19/2007] [Indexed: 10/23/2022]
Abstract
The production of arabinoxylan-degrading enzymes by the fungus Penicillium brasilianum, grown on different carbon and nitrogen sources as well as different environmental conditions was investigated. Highest feruloyl esterase (225 mU/ml) and alpha-L-arabinofuranosidase (211 mU/ml) activities were obtained when P. brasilianum was grown on sugar beet pulp, whereas maximum xylanase (17 U/ml) activity was found during growth on oat spelt xylan. Yeast extract was the preferable nitrogen source for the production of all the three enzymes. Further optimization of the production of the crude enzyme mixture was examined by experimental design using a D-optimal quadratic model. Investigation of the microbial regulation of enzyme production showed that the presence of free ferulic acid further stimulated the production and pointing to that the fungal regulatory mechanism involved a coordinated production and secretion of feruloyl esterase, xylanase and alpha-L-arabinofuranosidase. Since agroindustrial by-products are a potential source of phenolic acids, crude enzyme mixtures of P. brasilianum were tested for their hydrolysis abilities against eight complex or model substrates. While total release of phenolic acids and pentoses was not observed, the synergistic enhancement of hydrolysis in the presence of feruloyl esterase was clearly demonstrated.
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Affiliation(s)
- Gianni Panagiotou
- Center for Microbial Biotechnology, BioCentrum-DTU, Building 223, Technical University of Denmark, 2800 Lyngby, Denmark
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