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Nguyen TTM, Badhan AK, Reid ID, Ribeiro G, Gruninger R, Tsang A, Guan LL, McAllister T. Comparative analysis of functional diversity of rumen microbiome in bison and beef heifers. Appl Environ Microbiol 2023; 89:e0132023. [PMID: 38054735 PMCID: PMC10734544 DOI: 10.1128/aem.01320-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/17/2023] [Indexed: 12/07/2023] Open
Abstract
IMPORTANCE Ruminants play a key role in the conversion of cellulolytic plant material into high-quality meat and milk protein for humans. The rumen microbiome is the driver of this conversion, yet there is little information on how gene expression within the microbiome impacts the efficiency of this conversion process. The current study investigates gene expression in the rumen microbiome of beef heifers and bison and how transplantation of ruminal contents from bison to heifers alters gene expression. Understanding interactions between the host and the rumen microbiome is the key to developing informed approaches to rumen programming that will enhance production efficiency in ruminants.
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Affiliation(s)
- Thi Truc Minh Nguyen
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec, Canada
| | - Ajay Kumar Badhan
- Lethbridge Research and Development Centre, Lethbridge, Alberta, Canada
| | - Ian D. Reid
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec, Canada
| | - Gabriel Ribeiro
- Department of Animal and Poultry Science, College of Agriculture and Bioresource, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Robert Gruninger
- Lethbridge Research and Development Centre, Lethbridge, Alberta, Canada
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec, Canada
| | - Le Luo Guan
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada
| | - Tim McAllister
- Lethbridge Research and Development Centre, Lethbridge, Alberta, Canada
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2
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Badhan A, Low KE, Jones DR, Xing X, Milani MRM, Polo RO, Klassen L, Venketachalam S, Hahn MG, Abbott DW, McAllister TA. Mechanistic insights into the digestion of complex dietary fibre by the rumen microbiota using combinatorial high-resolution glycomics and transcriptomic analyses. Comput Struct Biotechnol J 2022; 20:148-164. [PMID: 34976318 PMCID: PMC8702857 DOI: 10.1016/j.csbj.2021.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/05/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
There is a knowledge gap regarding the factors that impede the ruminal digestion of plant cell walls or if rumen microbiota possess the functional activities to overcome these constraints. Innovative experimental methods were adopted to provide a high-resolution understanding of plant cell wall chemistries, identify higher-order structures that resist microbial digestion, and determine how they interact with the functional activities of the rumen microbiota. We characterized the total tract indigestible residue (TTIR) from cattle fed a low-quality straw diet using two comparative glycomic approaches: ELISA-based glycome profiling and total cell wall glycosidic linkage analysis. We successfully detected numerous and diverse cell wall glycan epitopes in barley straw (BS) and TTIR and determined their relative abundance pre- and post-total tract digestion. Of these, xyloglucans and heteroxylans were of higher abundance in TTIR. To determine if the rumen microbiota can further saccharify the residual plant polysaccharides within TTIR, rumen microbiota from cattle fed a diet containing BS were incubated with BS and TTIR ex vivo in batch cultures. Transcripts coding for carbohydrate-active enzymes (CAZymes) were identified and characterized for their contribution to cell wall digestion based on glycomic analyses, comparative gene expression profiles, and associated CAZyme families. High-resolution phylogenetic fingerprinting of these sequences encoded CAZymes with activities predicted to cleave the primary linkages within heteroxylan and arabinan. This experimental platform provides unprecedented precision in the understanding of forage structure and digestibility, which can be extended to other feed-host systems and inform next-generation solutions to improve the performance of ruminants fed low-quality forages.
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Key Words
- AB, arabinan
- ADF, acid detergent fibre
- AG, arabinogalactan
- AGP, arabinogalactan protein
- AIR, alcohol insoluble residue
- AO, ammonium oxalate
- AX, arabinoxylan
- BS, barley straw
- CAZyme, carbohydrate active enzyme
- CAZymes
- CE, carbohydrate esterase
- CH, chlorite
- DE, differentially expressed
- Dietary polysaccharides
- Differential gene expression
- ELISA, enzyme-linked immunosorbent assay
- FID, flame ionization detection GC, gas chromatography
- GH, glycosyl hydrolase
- Glycome profiling
- Glycoside hydrolase
- HG, homogalacturonan
- HPAEC-PAD, high performance anion exchange chromatography coupled with pulsed amperometric detection
- HX, heteroxylan
- Linkage analysis
- MS, mass spectrometry
- NDF, neutral detergent fibre
- Nutrient utilization
- PC, post-chlorite
- PL, polysaccharide lyase
- RG, rhamnogalacturonan
- Rumen microbiome
- SC, sodium carbonate
- TTIR, total tract indigestible residue
- Transcriptome
- XG, xyloglucan
- mAbs, monoclonal antibodies
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Affiliation(s)
- Ajay Badhan
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Kristin E Low
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Darryl R Jones
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Xiaohui Xing
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Mohammad Raza Marami Milani
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Rodrigo Ortega Polo
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Leeann Klassen
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Sivasankari Venketachalam
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA.,Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Michael G Hahn
- Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA.,Center for Bioenergy Innovation, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - D Wade Abbott
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
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Recombinant Technologies to Improve Ruminant Production Systems: The Past, Present and Future. Processes (Basel) 2020. [DOI: 10.3390/pr8121633] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The use of recombinant technologies has been proposed as an alternative to improve livestock production systems for more than 25 years. However, its effects on animal health and performance have not been described. Thus, understanding the use of recombinant technology could help to improve public acceptance. The objective of this review is to describe the effects of recombinant technologies and proteins on the performance, health status, and rumen fermentation of meat and milk ruminants. The heterologous expression and purification of proteins mainly include eukaryotic and prokaryotic systems like Escherichia coli and Pichia pastoris. Recombinant hormones have been commercially available since 1992, their effects remarkably improving both the reproductive and productive performance of animals. More recently the use of recombinant antigens and immune cells have proven to be effective in increasing meat and milk production in ruminant production systems. Likewise, the use of recombinant vaccines could help to reduce drug resistance developed by parasites and improve animal health. Recombinant enzymes and probiotics could help to enhance rumen fermentation and animal efficiency. Likewise, the use of recombinant technologies has been extended to the food industry as a strategy to enhance the organoleptic properties of animal-food sources, reduce food waste and mitigate the environmental impact. Despite these promising results, many of these recombinant technologies are still highly experimental. Thus, the feasibility of these technologies should be carefully addressed before implementation. Alternatively, the use of transgenic animals and the development of genome editing technology has expanded the frontiers in science and research. However, their use and implementation depend on complex policies and regulations that are still under development.
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Gama AR, Brito-Cunha CCQ, Campos ITN, de Souza GRL, Carneiro LC, Bataus LAM. Streptomyces thermocerradoensis I3 secretes a novel bifunctional xylanase/endoglucanase under solid-state fermentation. Biotechnol Prog 2019; 36:e2934. [PMID: 31642208 DOI: 10.1002/btpr.2934] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 11/08/2022]
Abstract
Lignocellulosic wastes can be potentially converted into several bioproducts such as glucose, xylo-oligosaccharides, and bioethanol. Certain processes, such as enzymatic hydrolysis, are generally needed to convert biomass into bioproducts. The present study investigated the production of xylanases and cellulases by Streptomyces thermocerradoensis I3 under solid-state fermentation (SSF), using wheat bran as a low-cost medium. The activities of xylanase and carboxymethyl cellulase (CMCase) were evaluated until 96 hr of incubation. The highest enzyme activity was observed after 72 hr of incubation. The crude enzyme extract was sequentially filtered, first using a 50 kDa filter, followed by a 30 kDa filter. Fraction 3 (F3) exhibited activities of both xylanase and CMCase. Xylanase and CMCase showed optimum activity at 70°C and pH 6.0 and 55°C and pH 6.0, respectively. The zymogram analysis showed a single activity band with a molecular mass of approximately 17 kDa. These findings provide strong evidence that the enzyme is a bifunctional xylanase/endoglucanase. This enzyme improved the saccharification of sugarcane bagasse by 1.76 times that of commercial cellulase. This enzyme has potential applications in various biotechnological procedures.
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Affiliation(s)
- Aline Rodrigues Gama
- Departament of Biochemistry and Molecular Biology, Federal University of Goiás, Goiânia, Brazil
| | | | - Ivan T N Campos
- Departament of Biochemistry and Molecular Biology, Federal University of Goiás, Goiânia, Brazil
| | | | - Lilian Carla Carneiro
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
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Terry SA, Badhan A, Wang Y, Chaves AV, McAllister TA. Fibre digestion by rumen microbiota — a review of recent metagenomic and metatranscriptomic studies. CANADIAN JOURNAL OF ANIMAL SCIENCE 2019. [DOI: 10.1139/cjas-2019-0024] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Plant biomass is the most abundant renewable resource on the planet, and the biopolymers of lignocellulose are the foundation of ruminant production systems. Optimizing the saccharification of lignocellulosic feeds is a crucial step in their bioconversion to ruminant protein. Plant cell walls are chemically heterogeneous structures that have evolved to provide structural support and protection to the plant. Ruminants are the most efficient digesters of lignocellulose due to a rich array of bacteria, archaea, fungi, and protozoa within the rumen and lower digestive tract. Metagenomic and metatranscriptomic studies have enhanced the current understanding of the composition, diversity, and function of the rumen microbiome. There is particular interest in identifying the carbohydrate-active enzymes responsible for the ruminal degradation of plant biomass. Understanding the roles of cellulosomes- and polysaccharide-utilising loci in ruminal fibre degradation could provide insight into strategies to enhance forage utilisation by ruminants. Despite advancements in “omics” technology, the majority of rumen microorganisms are still uncharacterised, and their ability to act synergistically is still not understood. By advancing our current knowledge of rumen fibre digestion, there may be opportunity to further improve the productive performance of ruminants fed forage diets.
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Affiliation(s)
- Stephanie A. Terry
- School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1st Ave South, Lethbridge, AB T1J 4B1, Canada
| | - Ajay Badhan
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1st Ave South, Lethbridge, AB T1J 4B1, Canada
| | - Yuxi Wang
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1st Ave South, Lethbridge, AB T1J 4B1, Canada
| | - Alexandre V. Chaves
- School of Life and Environmental Sciences, Faculty of Science, University of Sydney, Sydney, NSW, Australia
| | - Tim A. McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 1st Ave South, Lethbridge, AB T1J 4B1, Canada
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6
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Zaini NABM, Chatzifragkou A, Charalampopoulos D. Alkaline fractionation and enzymatic saccharification of wheat dried distillers grains with solubles (DDGS). FOOD AND BIOPRODUCTS PROCESSING 2019. [DOI: 10.1016/j.fbp.2019.09.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Beauchemin KA, Ribeiro GO, Ran T, Marami Milani MR, Yang W, Khanaki H, Gruninger R, Tsang A, McAllister TA. Recombinant fibrolytic feed enzymes and ammonia fibre expansion (AFEX) pretreatment of crop residues to improve fibre degradability in cattle. Anim Feed Sci Technol 2019. [DOI: 10.1016/j.anifeedsci.2019.114260] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Ran T, Saleem AM, Shen Y, Ribeiro GO, Beauchemin KA, Tsang A, Yang W, McAllister TA. Effects of a recombinant fibrolytic enzyme on fiber digestion, ruminal fermentation, nitrogen balance, and total tract digestibility of heifers fed a high forage diet1. J Anim Sci 2019; 97:3578-3587. [PMID: 31251799 PMCID: PMC6667264 DOI: 10.1093/jas/skz216] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/27/2019] [Indexed: 11/14/2022] Open
Abstract
A metabolism study was conducted using 8 ruminal cannulated beef heifers to investigate the effects of a recombinant fibrolytic enzyme (RFE; xylanase XYL10C) selected specifically for forage-fed ruminants on ruminal pH, fermentation, nitrogen balance, and total tract digestibility of heifers. The experiment was a cross-over design with 2 treatments and 2 periods. The 2 treatments were a basal diet containing 60% barley silage, 30% barley straw, and 10% supplement (DM basis) without (control) or with RFE. The enzyme was sprayed onto the barley straw at a rate of 6.6 × 104 IU·kg-1 DM 24 h before feeding. Each period comprised 2 wk of diet adaptation and 1 wk of sampling and data collection. Feed intake and total tract digestibility of DM, OM, NDF, and ADF were unaffected by RFE. Ruminal pH including mean, minimum, maximum, and duration pH <5.8, did not differ between treatments. Total VFA concentration, molar proportion of individual VFA, and acetate-to-propionate ratio were also not affected by RFE. However, ruminal NH3-N concentration (P < 0.06) and endoglucanase activity (P < 0.08) in ruminal fluid tended to be higher with RFE. Nitrogen utilization and microbial protein synthesis were not affected by treatment. These results indicate that XYL10C did not improve fiber digestion in heifers fed a high forage diet, despite the fact that it was specifically selected for this trait in laboratory assays. However, the increased ruminal NH3-N concentration suggests it potentially increased ruminal proteolytic activity.
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Affiliation(s)
- Tao Ran
- Lethbridge Research and Development Centre, Lethbridge, AB, Canada
- Key Laboratory for Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha, Hunan, China
| | - Atef M Saleem
- Lethbridge Research and Development Centre, Lethbridge, AB, Canada
- Department of Animal and Poultry Production, Faculty of Agriculture, South Valley University, Qena, Egypt
| | - Yizhao Shen
- Lethbridge Research and Development Centre, Lethbridge, AB, Canada
- College of Animal Science and Technology, Hebei Agricultural University, Baoding, China
| | - Gabriel O Ribeiro
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
| | | | - Adrian Tsang
- Centre for Structural and Functional Genomic, Concordia University, Montreal, QC, Canada
| | - Wenzhu Yang
- Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Lethbridge, AB, Canada
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9
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Adesogan AT, Arriola KG, Jiang Y, Oyebade A, Paula EM, Pech-Cervantes AA, Romero JJ, Ferraretto LF, Vyas D. Symposium review: Technologies for improving fiber utilization. J Dairy Sci 2019; 102:5726-5755. [PMID: 30928262 DOI: 10.3168/jds.2018-15334] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 01/14/2019] [Indexed: 12/20/2022]
Abstract
The forage lignocellulosic complex is one of the greatest limitations to utilization of the nutrients and energy in fiber. Consequently, several technologies have been developed to increase forage fiber utilization by dairy cows. Physical or mechanical processing techniques reduce forage particle size and gut fill and thereby increase intake. Such techniques increase the surface area for microbial colonization and may increase fiber utilization. Genetic technologies such as brown midrib mutants (BMR) with less lignin have been among the most repeatable and practical strategies to increase fiber utilization. Newer BMR corn hybrids are better yielding than the early hybrids and recent brachytic dwarf BMR sorghum hybrids avoid lodging problems of early hybrids. Several alkalis have been effective at increasing fiber digestibility. Among these, ammoniation has the added benefit of increasing the nitrogen concentration of the forage. However, few of these have been widely adopted due to the cost and the caustic nature of the chemicals. Urea treatment is more benign but requires sufficient urease and moisture for efficacy. Ammonia-fiber expansion technology uses high temperature, moisture, and pressure to degrade lignocellulose to a greater extent than ammoniation alone, but it occurs in reactors and is therefore not currently usable on farms. Biological technologies for increasing fiber utilization such as application of exogenous fibrolytic enzymes, live yeasts, and yeast culture have had equivocal effects on forage fiber digestion in individual studies, but recent meta-analyses indicate that their overall effects are positive. Nonhydrolytic expansin-like proteins act in synergy with fibrolytic enzymes to increase fiber digestion beyond that achieved by the enzyme alone due to their ability to expand cellulose microfibrils allowing greater enzyme penetration of the cell wall matrix. White-rot fungi are perhaps the biological agents with the greatest potential for lignocellulose deconstruction, but they require aerobic conditions and several strains degrade easily digestible carbohydrates. Less ruminant nutrition research has been conducted on brown rot fungi that deconstruct lignocellulose by generating highly destructive hydroxyl radicals via the Fenton reaction. More research is needed to increase the repeatability, efficacy, cost effectiveness, and on-farm applicability of technologies for increasing fiber utilization.
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Affiliation(s)
- A T Adesogan
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611.
| | - K G Arriola
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - Y Jiang
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - A Oyebade
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - E M Paula
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - A A Pech-Cervantes
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - J J Romero
- Animal and Veterinary Sciences Program, School of Food and Agriculture, University of Maine, Orono 04469
| | - L F Ferraretto
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
| | - D Vyas
- Department of Animal Sciences, Institute of Food and Agricultural Sciences, University of Florida, Gainesville 32611
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10
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Badhan A, Huang J, Wang Y, Abbott DW, Di Falco M, Tsang A, McAllister T. Saccharification efficiencies of multi-enzyme complexes produced by aerobic fungi. N Biotechnol 2018; 46:1-6. [PMID: 29803771 DOI: 10.1016/j.nbt.2018.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 05/08/2018] [Accepted: 05/09/2018] [Indexed: 11/16/2022]
Abstract
In the present study, we have characterized high molecular weight multi-enzyme complexes in two commercial enzymes produced by Trichoderma reesei (Spezyme CP) and Penicillium funiculosum (Accellerase XC). We successfully identified 146-1000 kDa complexes using Blue native polyacrylamide gel electrophoresis (BN-PAGE) to fractionate the protein profile in both preparations. Identified complexes dissociated into lower molecular weight constituents when loaded on SDS PAGE. Unfolding of the secondary structure of multi-enzyme complexes with trimethylamine (pH >10) suggested that they were not a result of unspecific protein aggregation. Cellulase (CMCase) profiles of extracts of BN-PAGE fractionated protein bands confirmed cellulase activity within the multi-enzyme complexes. A microassay was used to identify protein bands that promoted high levels of glucose release from barley straw. Those with high saccharification yield were subjected to LC-MS analysis to identify the principal enzymatic activities responsible. The results suggest that secretion of proteins by aerobic fungi leads to the formation of high molecular weight multi-enzyme complexes that display activity against carboxymethyl cellulose and barley straw.
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Affiliation(s)
- Ajay Badhan
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, Canada
| | - Jiangli Huang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Yuxi Wang
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, Canada
| | - D Wade Abbott
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, Canada
| | - Marcos Di Falco
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec, H4B 1R6, Canada
| | - Adrian Tsang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, 330096, China
| | - Tim McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta, Canada.
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11
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Ribeiro GO, Badhan A, Huang J, Beauchemin KA, Yang W, Wang Y, Tsang A, McAllister TA. New recombinant fibrolytic enzymes for improved in vitro ruminal fiber degradability of barley straw1. J Anim Sci 2018; 96:3928-3942. [PMID: 30053012 PMCID: PMC6127823 DOI: 10.1093/jas/sky251] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/28/2018] [Indexed: 11/14/2022] Open
Abstract
This study used a high-throughput in vitro microassay, in vitro batch culture, and the Rumen Simulation Technique (RUSITEC) to screen recombinant fibrolytic enzymes for their ability to increase the ruminal fiber degradability of barley straw. Eleven different recombinant enzymes in combination with a crude mixture of rumen enzymes (50% recombinant enzyme:50% crude mixture of rumen enzymes) were compared with the crude mixture of rumen enzymes alone. In the microassay, all treatments were applied at 15 mg of protein load per gram barley straw glucan. Based on the microassay results, 1 recombinant endoglucanase [EGL7A, from the glycoside hydrolase (GH) family 7], 2 recombinant xylanases (XYL10A and XYL10C, from GH10), and a recombinant enzyme mixture were selected and compared with a crude mixture of fibrolytic enzymes from Aspergillus aculeatus for their ability to hydrolyze barley straw. For batch culture, enzymes were applied to barley straw at 2 dosages (100 and 500 µg of protein/g of substrate DM). All enzymes increased (P < 0.05) DM disappearance and total VFA production, but the mixture of recombinant enzymes was not superior to the use of a single recombinant enzyme. Based on positive results (P < 0.05) for total DM disappearance and VFA production in batch culture, 3 enzymes (EGL7A, XYL10A, and XYL10C) were selected and applied to barley straw at 500 µg of protein per gram for further assessment in RUSITECs fed a concentrate:barley straw diet (300:700 g/kg DM). In RUSITECs, the recombinant enzyme XYL10A increased (P < 0.05) barley straw DM, NDF, and ADF disappearance, whereas EGL7A and XYL10C had no effect. The enzymes selected based on the high-throughput in vitro microassay consistently increased barley straw degradation in ruminal batch culture, but not in the semicontinuous culture RUSITEC system.
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Affiliation(s)
- Gabriel O Ribeiro
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Ajay Badhan
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Jiangli Huang
- Institute of Biological Resources, Jiangxi Academy of Sciences, Nanchang, China
| | - Karen A Beauchemin
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Wenzhu Yang
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Yuxi Wang
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, Montreal, QC, Canada
| | - Tim A McAllister
- Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada
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12
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Badhan A, Ribeiro GO, Jones DR, Wang Y, Abbott DW, Di Falco M, Tsang A, McAllister TA. Identification of novel enzymes to enhance the ruminal digestion of barley straw. BIORESOURCE TECHNOLOGY 2018; 260:76-84. [PMID: 29621684 DOI: 10.1016/j.biortech.2018.03.086] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 03/15/2018] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
Crude enzyme extracts typically contain a broad spectrum of enzyme activities, most of which are redundant to those naturally produced by the rumen microbiome. Identification of enzyme activities that are synergistic to those produced by the rumen microbiome could enable formulation of enzyme cocktails that improve fiber digestion in ruminants. Compared to untreated barley straw, Viscozyme® increased gas production, dry matter digestion (P < 0.01) and volatile fatty acid production (P < 0.001) in ruminal batch cultures. Fractionation of Viscozyme® by Blue Native PAGE and analyses using a microassay and mass-spectrometry revealed a GH74 endoglucanase, GH71 α-1,3-glucanase, GH5 mannanase, GH7 cellobiohydrolase, GH28 pectinase, and esterases from Viscozyme® contributed to enhanced saccharification of barley straw by rumen mix enzymes. Grouping of these identified activities with their carbohydrate active enzymes (CAZy) counterparts enabled selection of similar CAZymes for downstream production and screening. Mining of these specific activities from other biological systems could lead to high value enzyme formulations for ruminants.
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Affiliation(s)
- Ajay Badhan
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada
| | - Gabriel O Ribeiro
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada
| | - Darryl R Jones
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada
| | - Yuxi Wang
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada
| | - D Wade Abbott
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada
| | - Marcos Di Falco
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research Centre, Lethbridge, Alberta T1J 4P4, Canada.
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13
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The workability of Escherichia coli BL21 (DE3) and Pseudomonas putida KT2440 expression platforms with autodisplayed cellulases: a comparison. Appl Microbiol Biotechnol 2018; 102:4829-4841. [DOI: 10.1007/s00253-018-8987-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 04/02/2018] [Accepted: 04/05/2018] [Indexed: 02/07/2023]
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14
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Development of tailor-made synergistic cellulolytic enzyme system for saccharification of steam exploded sugarcane bagasse. J Biosci Bioeng 2018; 125:390-396. [DOI: 10.1016/j.jbiosc.2017.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 10/26/2017] [Accepted: 11/01/2017] [Indexed: 02/06/2023]
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15
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Laluce C, Igbojionu LI, Dussán KJ. Fungal Enzymes Applied to Industrial Processes for Bioethanol Production. Fungal Biol 2018. [DOI: 10.1007/978-3-319-90379-8_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Jin M, Sarks C, Bals BD, Posawatz N, Gunawan C, Dale BE, Balan V. Toward high solids loading process for lignocellulosic biofuel production at a low cost. Biotechnol Bioeng 2017; 114:980-989. [PMID: 27888662 DOI: 10.1002/bit.26229] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 10/23/2016] [Accepted: 11/20/2016] [Indexed: 11/09/2022]
Abstract
High solids loadings (>18 wt%) in enzymatic hydrolysis and fermentation are desired for lignocellulosic biofuel production at a high titer and low cost. However, sugar conversion and ethanol yield decrease with increasing solids loading. The factor(s) limiting sugar conversion at high solids loading is not clearly understood. In the present study, we investigated the effect of solids loading on simultaneous saccharification and co-fermentation (SSCF) of AFEX™ (ammonia fiber expansion) pretreated corn stover for ethanol production using a xylose fermenting strain Saccharomyces cerevisiae 424A(LNH-ST). Decreased sugar conversion and ethanol yield with increasing solids loading were also observed. End-product (ethanol) was proven to be the major cause of this issue and increased degradation products with increasing solids loading was also a cause. For the first time, we show that with in situ removal of end-product by performing SSCF aerobically, sugar conversion stopped decreasing with increasing solids loading and monomeric sugar conversion reached as high as 93% at a high solids loading of 24.9 wt%. Techno-economic analysis was employed to explore the economic possibilities of cellulosic ethanol production at high solids loadings. The results suggest that low-cost in situ removal of ethanol during SSCF would significantly improve the economics of high solids loading processes. Biotechnol. Bioeng. 2017;114: 980-989. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Mingjie Jin
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.,Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Cory Sarks
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Bryan D Bals
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Nick Posawatz
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Christa Gunawan
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Bruce E Dale
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
| | - Venkatesh Balan
- Biomass Conversion Research Laboratory (BCRL), Department of Chemical Engineering and Materials Science, DOE Great Lakes Bioenergy Research Center, Michigan State University, Lansing, Michigan
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17
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Jones DR, Uddin MS, Gruninger RJ, Pham TTM, Thomas D, Boraston AB, Briggs J, Pluvinage B, McAllister TA, Forster RJ, Tsang A, Selinger LB, Abbott DW. Discovery and characterization of family 39 glycoside hydrolases from rumen anaerobic fungi with polyspecific activity on rare arabinosyl substrates. J Biol Chem 2017; 292:12606-12620. [PMID: 28588026 DOI: 10.1074/jbc.m117.789008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 05/30/2017] [Indexed: 11/06/2022] Open
Abstract
Enzyme activities that improve digestion of recalcitrant plant cell wall polysaccharides may offer solutions for sustainable industries. To this end, anaerobic fungi in the rumen have been identified as a promising source of novel carbohydrate active enzymes (CAZymes) that modify plant cell wall polysaccharides and other complex glycans. Many CAZymes share insufficient sequence identity to characterized proteins from other microbial ecosystems to infer their function; thus presenting challenges to their identification. In this study, four rumen fungal genes (nf2152, nf2215, nf2523, and pr2455) were identified that encode family 39 glycoside hydrolases (GH39s), and have conserved structural features with GH51s. Two recombinant proteins, NF2152 and NF2523, were characterized using a variety of biochemical and structural techniques, and were determined to have distinct catalytic activities. NF2152 releases a single product, β1,2-arabinobiose (Ara2) from sugar beet arabinan (SBA), and β1,2-Ara2 and α-1,2-galactoarabinose (Gal-Ara) from rye arabinoxylan (RAX). NF2523 exclusively releases α-1,2-Gal-Ara from RAX, which represents the first description of a galacto-(α-1,2)-arabinosidase. Both β-1,2-Ara2 and α-1,2-Gal-Ara are disaccharides not previously described within SBA and RAX. In this regard, the enzymes studied here may represent valuable new biocatalytic tools for investigating the structures of rare arabinosyl-containing glycans, and potentially for facilitating their modification in industrial applications.
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Affiliation(s)
- Darryl R Jones
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Muhammed Salah Uddin
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada; Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta T1K 6T5, Canada
| | - Robert J Gruninger
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Thi Thanh My Pham
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Dallas Thomas
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Alisdair B Boraston
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada
| | - Jonathan Briggs
- School of Biology, Ridley Building 2, Newcastle University, Claremont Road, Newcastle upon Tyne NE1 7RU, United Kingdom
| | - Benjamin Pluvinage
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Robert J Forster
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - L Brent Selinger
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta T1K 6T5, Canada
| | - D Wade Abbott
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, Alberta T1J 4B1, Canada; Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta T1K 6T5, Canada.
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18
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Azadian F, Badoei-dalfard A, Namaki-Shoushtari A, Karami Z, Hassanshahian M. Production and characterization of an acido-thermophilic, organic solvent stable cellulase from Bacillus sonorensis HSC7 by conversion of lignocellulosic wastes. J Genet Eng Biotechnol 2017; 15:187-196. [PMID: 30647655 PMCID: PMC6296611 DOI: 10.1016/j.jgeb.2016.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 11/15/2016] [Accepted: 12/19/2016] [Indexed: 01/06/2023]
Abstract
The acidophilic and thermophilic cellulase would facilitate the conversion of lignocellulosic biomass to biofuel. In this study, Bacillus sonorensis HSC7 isolated as the best thermophilic cellulose degrading bacterium from Gorooh hot spring. 16S rRNA gene sequencing showed that, this strain closely related to the B. sonorensis. CMCase production was considered under varying environmental parameters. Results showed that, sucrose and (NH4)2SO4 were obtained as the best carbon and nitrogen sources for CMCase production. B. sonorensis HSC7 produced CMCase during the growth in optimized medium supplemented with agricultural wastes as sole carbon sources. The enzyme was active with optimum temperature of 70 °C and the optimum CMCase activity and stability observed at pH 4.0 and 5.0, respectively. These are characteristics indicating that, this enzyme could be an acidophilic and thermophilic CMCase. Furthermore, the CMCase activity improved by methanol (166%), chloroform (152%), while it was inhibited by DMF (61%). The CMCase activity was enhanced in the presence of Mg+2 (110%), Cu+2 (116%), Triton X-100 (118%) and it retained 57% of its activity at 30% NaCl. The compatibility of HSC7 CMCase varied for each laundry detergent, with higher stability being observed in the presence of Taj® and darya®. This enzyme, that is able to work under extreme conditions, has potential applications in various industries.
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Affiliation(s)
| | - Arastoo Badoei-dalfard
- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
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19
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20
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Adesioye FA, Makhalanyane TP, Biely P, Cowan DA. Phylogeny, classification and metagenomic bioprospecting of microbial acetyl xylan esterases. Enzyme Microb Technol 2016; 93-94:79-91. [DOI: 10.1016/j.enzmictec.2016.07.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/18/2016] [Accepted: 07/01/2016] [Indexed: 02/06/2023]
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21
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Phitsuwan P, Sakka K, Ratanakhanokchai K. Structural changes and enzymatic response of Napier grass (Pennisetum purpureum) stem induced by alkaline pretreatment. BIORESOURCE TECHNOLOGY 2016; 218:247-56. [PMID: 27371797 DOI: 10.1016/j.biortech.2016.06.089] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/17/2016] [Accepted: 06/18/2016] [Indexed: 05/15/2023]
Abstract
Napier grass is a promising energy crop in the tropical region. Feasible alkaline pretreatment technologies, including NaOH, Ca(OH)2, NH3, and alkaline H2O2 (aH2O2), were used to delignify lignocellulose with the aim of improving glucose recovery from Napier grass stem cellulose via enzymatic saccharification. The influences of the pretreatments on structural alterations were examined using SEM, FTIR, XRD, and TGA, and the relationships between these changes and the enzymatic digestibility of cellulose were addressed. The extensive removal of lignin (84%) in NaOH-pretreated fibre agreed well with the high glucan conversion rate (94%) by enzymatic hydrolysis, while the conversion rates for fibre pretreated with Ca(OH)2, NH3, and aH2O2 approached 60%, 51%, and 42%, respectively. The substantial solubilisation of lignin created porosity, allowing increased cellulose accessibility to cellulases in NaOH-pretreated fibre. In contrast, high lignin content, lignin redeposition on the surface, and residual internal lignin and hemicellulose impeded enzymatic performance in Ca(OH)2-, NH3-, and aH2O2-pretreated fibres, respectively.
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Affiliation(s)
- Paripok Phitsuwan
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkuntien, Bangkok 10150, Thailand.
| | - Kazuo Sakka
- Graduated School of Bioresources, Mie University, 1577 Kurimamachiya-cho, Tsu 514-8507, Japan
| | - Khanok Ratanakhanokchai
- Division of Biochemical Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkuntien, Bangkok 10150, Thailand
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22
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Effect of homofermentative lactic acid bacteria and exogenous hydrolytic enzymes on the ensiling characteristics and rumen degradability of alfalfa and corn silages. ACTA ACUST UNITED AC 2016. [DOI: 10.15232/pas.2015-01494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Contributions of a unique β-clamp to substrate recognition illuminates the molecular basis of exolysis in ferulic acid esterases. Biochem J 2016; 473:839-49. [PMID: 27026397 DOI: 10.1042/bj20151153] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 01/18/2016] [Indexed: 11/17/2022]
Abstract
Lignocellulosic biomass is a promising renewable resource; however, deconstruction of this material is still the rate-limiting step. Major obstacles in the biocatalytic turnover of lignocellulose are ester-linked decorations that prevent access to primary structural polysaccharides. Enzymes targeting these esters represent promising biotools for increasing bioconversion efficiency. Ruminant livestock are unique in their ability to degrade lignocellulose through the action of their gut microbiome. The anaerobic fungi (phylum Neocallimastigomycota) are key members of this ecosystem that express a large repertoire of carbohydrate-active enzymes (CAZymes) with little sequence identity with characterized CAZymes [Lombard, Golaconda, Drula, Coutinho and Henrissat (2014) Nucleic Acids Res. 42: , D490-D495]. We have identified a carbohydrate esterase family 1 (CE1) ferulic acid esterase (FAE) belonging to Anaeromyces mucronatus(AmCE1/Fae1a), and determined its X-ray structure in both the presence [1.55 Å (1 Å=0.1 nm)] and absence (1.60 Å) of ferulic acid. AmCE1 adopts an α/β-hydrolase fold that is structurally conserved with bacterial FAEs, and possesses a unique loop, termed the β-clamp, that encloses the ligand. Isothermal titration calorimetry reveals that substrate binding is driven by enthalpic contributions, which overcomes a large entropic penalty. A comparative analysis of AmCE1 with related enzymes has uncovered the apparent structural basis for differential FAE activities targeting cross-linking ferulic acid conjugates compared with terminal decorations. Based on comparisons to structurally characterized FAEs, we propose that the β-clamp may define the structural basis of exolytic activities in FAEs. This provides a structure-based tool for predicting exolysis and endolysis in CE1. These insights hold promise for rationally identifying enzymes tailored for bioconversion of biomass with variations in cell wall composition.
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24
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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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25
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Ribeiro G, Gruninger R, Badhan A, McAllister T. Mining the rumen for fibrolytic feed enzymes. Anim Front 2016. [DOI: 10.2527/af.2016-0019] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- G.O. Ribeiro
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403-1st Ave South, Lethbridge Alberta, T1J 4B1
| | - R.J. Gruninger
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403-1st Ave South, Lethbridge Alberta, T1J 4B1
| | - A. Badhan
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403-1st Ave South, Lethbridge Alberta, T1J 4B1
| | - T.A. McAllister
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403-1st Ave South, Lethbridge Alberta, T1J 4B1
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26
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Mahajan C, Basotra N, Singh S, Di Falco M, Tsang A, Chadha BS. Malbranchea cinnamomea: A thermophilic fungal source of catalytically efficient lignocellulolytic glycosyl hydrolases and metal dependent enzymes. BIORESOURCE TECHNOLOGY 2016; 200:55-63. [PMID: 26476165 DOI: 10.1016/j.biortech.2015.09.113] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 09/25/2015] [Accepted: 09/28/2015] [Indexed: 05/11/2023]
Abstract
This study reports thermophilic fungus Malbranchea cinnamomea as an important source of lignocellulolytic enzymes. The secretome analysis using LC-MS/MS orbitrap showed that fungus produced a spectrum of glycosyl hydrolases (cellulase/hemicellulase), polysaccharide lyases (PL) and carbohydrate esterases (CE) in addition to cellobiose dehydrogenase (CDH) indicating the presence of functional classical and oxidative cellulolytic mechanisms. The protein fractions in the secretome resolved by ion exchange chromatography were analyzed for ability to hydrolyze alkali treated carrot grass (ATCG) in the presence of Mn(2+)/Cu(2+). This strategy in tandem with peptide mass fingerprinting led to identification of metal dependent protein hydrolases with no apparent hydrolytic activity, however, showed 5.7 folds higher saccharification in presence of Mn(2+). Furthermore, adding different protein fractions to commercial cellulase (Novozymes: Cellic CTec2) resulted in enhanced hydrolysis of ATCG ranging between 1.57 and 3.43 folds indicating the enzymes from M. cinnamomea as catalytically efficient.
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Affiliation(s)
- Chhavi Mahajan
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
| | - Neha Basotra
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
| | - Surender Singh
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India.
| | - Marcos Di Falco
- Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec H4B 1R6, Canada.
| | - Adrian Tsang
- Centre for Structural and Functional Genomics, Concordia University, 7141 Sherbrooke Street West, Montréal, Québec H4B 1R6, Canada.
| | - B S Chadha
- Department of Microbiology, Guru Nanak Dev University, Amritsar 143005, Punjab, India.
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27
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Hunt CJ, Tanksale A, Haritos VS. Biochemical characterization of a halotolerant feruloyl esterase from Actinomyces spp.: refolding and activity following thermal deactivation. Appl Microbiol Biotechnol 2015; 100:1777-1787. [DOI: 10.1007/s00253-015-7044-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 09/13/2015] [Accepted: 09/24/2015] [Indexed: 11/28/2022]
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28
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Hansen GH, Lübeck M, Frisvad JC, Lübeck PS, Andersen B. Production of cellulolytic enzymes from ascomycetes: Comparison of solid state and submerged fermentation. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.05.017] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Improvement in Saccharification Yield of Mixed Rumen Enzymes by Identification of Recalcitrant Cell Wall Constituents Using Enzyme Fingerprinting. BIOMED RESEARCH INTERNATIONAL 2015; 2015:562952. [PMID: 26180803 PMCID: PMC4477221 DOI: 10.1155/2015/562952] [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: 11/19/2014] [Revised: 01/15/2015] [Accepted: 01/16/2015] [Indexed: 11/17/2022]
Abstract
Identification of recalcitrant factors that limit digestion of forages and the development of enzymatic approaches that improve hydrolysis could play a key role in improving the efficiency of meat and milk production in ruminants. Enzyme fingerprinting of barley silage fed to heifers and total tract indigestible fibre residue (TIFR) collected from feces was used to identify cell wall components resistant to total tract digestion. Enzyme fingerprinting results identified acetyl xylan esterases as key to the enhanced ruminal digestion. FTIR analysis also suggested cross-link cell wall polymers as principal components of indigested fiber residues in feces. Based on structural information from enzymatic fingerprinting and FTIR, enzyme pretreatment to enhance glucose yield from barley straw and alfalfa hay upon exposure to mixed rumen-enzymes was developed. Prehydrolysis effects of recombinant fungal fibrolytic hydrolases were analyzed using microassay in combination with statistical experimental design. Recombinant hemicellulases and auxiliary enzymes initiated degradation of plant structural polysaccharides upon application and improved the in vitro saccharification of alfalfa and barley straw by mixed rumen enzymes. The validation results showed that microassay in combination with statistical experimental design can be successfully used to predict effective enzyme pretreatments that can enhance plant cell wall digestion by mixed rumen enzymes.
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30
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Recombinant Trichoderma harzianum endoglucanase I (Cel7B) is a highly acidic and promiscuous carbohydrate-active enzyme. Appl Microbiol Biotechnol 2015; 99:9591-604. [DOI: 10.1007/s00253-015-6772-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/09/2015] [Accepted: 06/12/2015] [Indexed: 12/11/2022]
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31
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Adsul M, Sharma B, Singhania RR, Saini JK, Sharma A, Mathur A, Gupta R, Tuli DK. Blending of cellulolytic enzyme preparations from different fungal sources for improved cellulose hydrolysis by increasing synergism. RSC Adv 2014. [DOI: 10.1039/c4ra08129c] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A prepared enzyme cocktail from different fungal enzyme preparations increases the hydrolysis of avicel/wheat straw by increasing synergism between the same or different types of cellulases.
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Affiliation(s)
- Mukund Adsul
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Bhawna Sharma
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Reeta Rani Singhania
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Jitendra Kumar Saini
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Ankita Sharma
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Anshu Mathur
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Ravi Gupta
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
| | - Deepak Kumar Tuli
- DBT-IOC Centre for Advanced Bioenergy Research
- Indian Oil R and D Centre
- Faridabad-121007, India
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