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Mu D, Li P, Ma T, Wei D, Montalbán-López M, Ai Y, Wu X, Wang Y, Li X, Li X. Advances in the understanding of the production, modification and applications of xylanases in the food industry. Enzyme Microb Technol 2024; 179:110473. [PMID: 38917734 DOI: 10.1016/j.enzmictec.2024.110473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2024] [Revised: 05/25/2024] [Accepted: 06/12/2024] [Indexed: 06/27/2024]
Abstract
Xylanases have broad applications in the food industry to decompose the complex carbohydrate xylan. This is applicable to enhance juice clarity, improve dough softness, or reduce beer turbidity. It can also be used to produce prebiotics and increase the nutritional value in foodstuff. However, the low yield and poor stability of most natural xylanases hinders their further applications. Therefore, it is imperative to explore higher-quality xylanases to address the potential challenges that appear in the food industry and to comprehensively improve the production, modification, and utilization of xylanases. Xylanases, due to their various sources, exhibit diverse characteristics that affect production and activity. Most fungi are suitable for solid-state fermentation to produce xylanases, but in liquid fermentation, microbial metabolism is more vigorous, resulting in higher yield. Fungi produce higher xylanase activity, but bacterial xylanases perform better than fungal ones under certain extreme conditions (high temperature, extreme pH). Gene and protein engineering technology helps to improve the production efficiency of xylanases and enhances their thermal stability and catalytic properties.
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Affiliation(s)
- Dongdong Mu
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Gongda Biotech (Huangshan) Limited Company, Huangshan 245400, China.
| | - Penglong Li
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Tiange Ma
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Dehua Wei
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Manuel Montalbán-López
- Institute of Biotechnology and Department of Microbiology, Faculty of Sciences, University of Granada, Granada 18071, Spain
| | - Yaqian Ai
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Xuefeng Wu
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China
| | - Yifeng Wang
- Anhui Yunshang Cultural Tourism Development Group, Anqing 246600, China
| | - Xu Li
- Anhui Wanyue Xinhe Project Management Company Limited, Anqing 246600, China
| | - Xingjiang Li
- Anhui Fermented Food Engineering Research Center, School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Gongda Biotech (Huangshan) Limited Company, Huangshan 245400, China.
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Huang J, Zhang D, Omedi JO, Lei Y, Su X, Wu M, Huang W. Improving the inhibitory resistance of xylanase FgXyn11C from Fusarium graminearum to SyXIP-I by site-directed mutagenesis. Int J Biol Macromol 2024; 271:132434. [PMID: 38788879 DOI: 10.1016/j.ijbiomac.2024.132434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/26/2024]
Abstract
The aim of this study was to improve the inhibitory resistance of xylanase FgXyn11C from Fusarium graminearum to XIP in cereal flour. Site saturation mutagenesis was performed using computer-aided redesign. Firstly, based on multiple primary structure alignments, the amino acid residues in the active site architecture were identified, and specific residue T144 in the thumb region of FgXyn11C was selected for site-saturation mutagenesis. After screening, FgXyn11CT144F was selected as the best mutant, as it displayed the highest enzymatic activity and resistance simultaneously compared to other mutants. The specific activity of FgXyn11CT144F was 208.8 U/mg and it exhibited complete resistance to SyXIP-I. Compared with the wild-type, FgXyn11CT144F displayed similar activity and the most resistant against SyXIP-I. The optimal temperature and pH of the wild-type and purified FgXyn11CT144F were similar at pH 5.0 and 30 °C. Our findings provided preliminary insight into how the specific residue at position 144 in the thumb region of FgXyn11C influenced the enzymatic properties and interacted with SyXIP-I. The inhibition sensitivity of FgXyn11C was reduced through directed evolution, leading to creation of the mutant enzyme FgXyn11CT144F. The FgXyn11CT144F resistance to SyXIP-I has potential application and can also provide references for engineering other resistant xylanases of the GHF11.
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Affiliation(s)
- Jing Huang
- State Key Laboratory of Food Science and Technology, the Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Ingredient Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Dong Zhang
- School of Biotechnology, Jiangnan University, Wuxi 214122, China; Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Jacob Ojobi Omedi
- State Key Laboratory of Food Science and Technology, the Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Ingredient Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yuqing Lei
- School of Biotechnology, Jiangnan University, Wuxi 214122, China; Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Xiaoya Su
- School of Biotechnology, Jiangnan University, Wuxi 214122, China; Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Minchen Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China.
| | - Weining Huang
- State Key Laboratory of Food Science and Technology, the Laboratory of Baking and Fermentation Science, Cereals/Sourdough and Ingredient Functionality Research, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China.
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Tai H, Guo Q, Zhao J, Liu Y, Yu H, Liu Y, Qu Y, Du G, Li R. A thermostable xylanase hydrolyzes several polysaccharides from Bacillus altitudinis JYY-02 showing promise for industrial applications. Carbohydr Res 2024; 538:109080. [PMID: 38513464 DOI: 10.1016/j.carres.2024.109080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/05/2024] [Accepted: 03/07/2024] [Indexed: 03/23/2024]
Abstract
Polysaccharides have attracted immense attention as the largest source of bioactive compounds. Its bioavailability and bioactivity can be improved by utilizing degradation enzymes to reduce their molecular weight and viscosity. In this study, a 654 bp gene encoding xylanase was screened from the genome of Bacillus altitudinis JYY-02 and overexpressed in Escherichia coli Rosetta (DE3). The recombinant xylanase with a molecular weight of 27.98 kDa was purified (11.7-fold) using Ni-NTA affinity chromatography, with a 43.6% final yield. Through molecular docking, Glu, Arg, Tyr, and Trp were found to be the main amino acids involved in the interaction between xylanase and xylobiose. The effects of pH, temperature, metal ions, and substrates on xylanase activity were determined, and the results showed that the highest catalytic activity was displayed at pH 6.5, 50 °C temperature, with Cu2+ as an activator and xylan as the substrate. The Km (substrate concentration that yields a half-maximal velocity) and Vmax (maximum velocity) of recombinant xylanase were 6.876 mg/mL and 10984.183 μmol/mg∙pr/min, respectively. The recombinant xylanase was thermostable, with 85% and 39% of the enzymatic activity retained after 1 h at 60 °C and 1 h at 90 °C, respectively. The recombinant xylanase demonstrated a significant clarifying effect on fruit juices.
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Affiliation(s)
- Hongzheng Tai
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Qunqun Guo
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Jiamin Zhao
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Yandong Liu
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Hao Yu
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Yili Liu
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Yifan Qu
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China
| | - Guicai Du
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China.
| | - Ronggui Li
- College of Life Sciences, Qingdao University, Qingdao, 266071, PR China.
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Chen B, Zeng Y, Wang J, Lei M, Gan B, Wan Z, Wu L, Luo G, Cao S, An T, Zhang Q, Pan K, Jing B, Ni X, Zeng D. Targeted Screening of Fiber Degrading Bacteria with Probiotic Function in Herbivore Feces. Probiotics Antimicrob Proteins 2024:10.1007/s12602-024-10215-5. [PMID: 38300451 DOI: 10.1007/s12602-024-10215-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2024] [Indexed: 02/02/2024]
Abstract
Cellulolytic bacteria with probiotic functions play a crucial role in promoting the intestinal health in herbivores. In this study, we aimed to correlate the 16S rRNA gene amplicon sequencing and fiber-degrading enzyme activity data from six different herbivore feces samples. By utilizing the separation and screening steps of probiotics, we targeted and screened high-efficiency fiber-degrading bacteria with probiotic functions. The animals included Maiwa Yak (MY), Holstein cow (CC), Tibetan sheep (TS), Southern Sichuan black goat (SG), Sichuan white rex rabbit (CR), and New Zealand white rabbit (ZR). The results showed that the enzymes associated with fiber degradation were higher in goat and sheep feces compared to cattle and rabbit's feces. Correlation analysis revealed that Bacillus and Fibrobacter were positively correlated with five types of fiber-degrading related enzymes. Notably, the relative abundance of Bacillus in the feces of Tibetan sheep was significantly higher than that of other five herbivores. A strain TS5 with good cellulose decomposition ability from the feces of Tibetan sheep by Congored staining, filter paper decomposition test, and enzyme activity determination was isolated. The strain was identified as Bacillus velezensis by biological characteristics, biochemical analysis, and 16S rRNA gene sequencing. To test the probiotic properties of Bacillus velezensis TS5, we evaluated its tolerance to acid and bile salt, production of digestive enzymes, antioxidants, antibacterial activity, and adhesion ability. The results showed that the strain had good tolerance to pH 2.0 and 0.3% bile salts, as well as good potential to produce cellulase, protease, amylase, and lipase. This strain also had good antioxidant capacity and the ability to antagonistic Staphylococcus aureus BJ216, Salmonella SC06, Enterotoxigenic Escherichia coli CVCC196, and Escherichia coli ATCC25922. More importantly, the strain had good self-aggregation and Caco-2 cell adhesion rate. In addition, we tested the safety of Bacillus velezensis TS5 by hemolysis test, antimicrobial susceptibility test, and acute toxicity test in mice. The results showed that the strain had no hemolytic phenotype, did not develop resistance to 19 commonly used antibiotics, had no cytotoxicity to Caco-2, and did not have acute toxic harm to mice. In summary, this study targeted isolated and screened a strain of Bacillus velezensis TS5 with high fiber-degrading ability and probiotic potency. This strain can be used as a potential probiotic for feeding microbial preparations for ruminants.
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Affiliation(s)
- Benhao Chen
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yan Zeng
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Jie Wang
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Mingxia Lei
- Neijiang Center for Animal and Plant Epidemic Disease Prevention and Control and Agricultural Products Quality Inspection, Neijiang, China
| | - Baoxing Gan
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhiqiang Wan
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Liqian Wu
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Guangrong Luo
- Sichuan Longri Breeding Stock Farm, Aba Autonomous Prefecture, China
| | - Suizhong Cao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Tianwu An
- Sichuan Academy of Grassland Sciences, Chengdu, China
| | - Qibin Zhang
- Agricultural Comprehensive Service Center of Beimu Town, Neijiang, China
| | - Kangcheng Pan
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Bo Jing
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Xueqin Ni
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.
| | - Dong Zeng
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China.
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Wang J, Bao C, Cao H, Huang F, Liu Y, Cao Y. Multi-copy expression of a protease-resistant xylanase with high xylan degradation ability and its application in broilers fed wheat-based diets. Int J Biol Macromol 2024; 257:128633. [PMID: 38070812 DOI: 10.1016/j.ijbiomac.2023.128633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 11/27/2023] [Accepted: 12/03/2023] [Indexed: 01/26/2024]
Abstract
The acidic thermostable xylanase (AT-xynA) has great potential in the feed industry, but its low activity is not conductive to large-scale production, and its application in poultry diets still needs to be further evaluated. In Experiment1, AT-xynA activity increased 3.10 times by constructing multi-copy strains, and the highest activity reached 10,018.29 ± 91.18 U/mL. AT-xynA showed protease resistance, high specificity for xylan substrates, xylobiose and xylotriose were the main hydrolysates. In Experiment2, 192 broilers were assigned into 3 treatments including a wheat-based diet, and the diets supplemented with AT-xynA during the entire period (XY-42) or exclusively during the early stage (XY-21). AT-xynA improved growth performance, while the performance of XY-21 and XY-42 was identical. To further clarify the mechanism underlying the particular effectiveness of AT-xynA during the early stage, 128 broilers were allotted into 2 treatments including a wheat-based diet and the diet supplemented with AT-xynA for 42 d in Experiment3. AT-xynA improved intestinal digestive function and microbiota composition, the benefits were stronger in younger broilers than older ones. Overall, the activity of AT-xynA exhibiting protease resistance and high xylan degradation ability increased by constructing multi-copy strains, and AT-xynA was particularly effective in improving broiler performance during the early stage.
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Affiliation(s)
- Jian Wang
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China; Department of Nutrition and Health, China Agricultural University, Beijing 100091, People's Republic of China
| | - Chengling Bao
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Heng Cao
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Fei Huang
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yajing Liu
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China
| | - Yunhe Cao
- State Key Laboratory of Animal Nutrition and Feeding, College of Animal Science and Technology, China Agricultural University, Beijing 100193, People's Republic of China.
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Valladares-Diestra KK, de Souza Vandenberghe LP, Vieira S, Goyzueta-Mamani LD, de Mattos PBG, Manzoki MC, Soccol VT, Soccol CR. The Potential of Xylooligosaccharides as Prebiotics and Their Sustainable Production from Agro-Industrial by-Products. Foods 2023; 12:2681. [PMID: 37509773 PMCID: PMC10379617 DOI: 10.3390/foods12142681] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/07/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
In recent years, concerns about a good-quality diet have increased. Food supplements such as prebiotics have great nutritional and health benefits. Within the diverse range of prebiotics, xylooligosaccharides (XOs) show high potential, presenting exceptional properties for the prevention of systemic disorders. XOs can be found in different natural sources; however, their production is limited. Lignocellulosic biomasses present a high potential as a source of raw material for the production of XOs, making the agro-industrial by-products the perfect candidates for production on an industrial scale. However, these biomasses require the application of physicochemical pretreatments to obtain XOs. Different pretreatment methodologies are discussed in terms of increasing the production of XOs and limiting the coproduction of toxic compounds. The advance in new technologies for XOs production could decrease their real cost (USD 25-50/kg) on an industrial scale and would increase the volume of market transactions in the prebiotic sector (USD 4.5 billion). In this sense, new patents and innovations are being strategically developed to expand the use of XOs as daily prebiotics.
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Affiliation(s)
- Kim Kley Valladares-Diestra
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Luciana Porto de Souza Vandenberghe
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Sabrina Vieira
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Luis Daniel Goyzueta-Mamani
- Vicerrectorado de Investigación, Universidad Católica de Santa María, Urb. San José s/n-Umacollo, Arequipa 04000, Peru
| | - Patricia Beatriz Gruening de Mattos
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Maria Clara Manzoki
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Vanete Thomaz Soccol
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
| | - Carlos Ricardo Soccol
- Department of Bioprocess Engineering and Biotechnology, Centro Politécnico, Federal University of Paraná, Curitiba 81531-980, Paraná, Brazil
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Mei J, Zhao F, Hou Y, Ahmad S, Cao Y, Yang Z, Ai H, Sheng L. Two novel phosphorus/potassium-degradation bacteria: Bacillus aerophilus SD-1/Bacillus altitudinis SD-3 and their application in two-stage composting of corncob residue. Arch Microbiol 2022; 205:17. [PMID: 36480050 DOI: 10.1007/s00203-022-03357-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/25/2022] [Accepted: 11/28/2022] [Indexed: 12/13/2022]
Abstract
For effective utilization of corncob residue to realize green circular production, using composting to obtain a high-quality and low-cost biomass fertilizer has become a very important transformation avenue. In this paper, two novel phosphorus/potassium-degradation bacterial strains were isolated from tobacco straw and identified as Bacillus aerophilus SD-1/Bacillus altitudinis SD-3 (abbreviated as SD-1/SD-3). These identified two novel bacteria SD-1/SD-3 show that the soluble phosphorus content of SD-1/SD-3 reached 360.89 mg L-1/403.56 mg L-1 in the shake flask test, and the mass concentration of soluble potassium is 136.56 mg L-1/139.89 mg L-1. In addition, the Laccase (Lac), Lignin peroxidase (LiP), and Manganese peroxidase (MnP) activities of SD-1 and SD-3 are 54.45 U L-1/394.84 U L-1/222.79 U L-1 and 46.27 U L-1/395.26 U L-1/203.98 U L-1 respectively, with the carboxy-methyl cellulase (CMCase) of 72.07 U mL-1 and 52.69 U mL-1. Meanwhile, the effects of three different combinations of cultures, i.e., no inoculation (K1), inoculation of SD-1/SD-3 on day 21 (K2) and on day 0 (G) are investigated to understand the influence on the degradation degree of corncob residue compost. The results of K2 compost treatment showed that the effective P/K content increased nearly 3.1/2.4 times, the degradation of cellulose/lignin was 49.1/68.0%, and the germination rate was 110.23%, which were higher than other experiment groups K1/G. In conclusion, knowledge of this paper will be very useful for the industrial sector for the treatment of complex corncob residue.
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Affiliation(s)
- Jinfei Mei
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, People's Republic of China
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China
| | - Fengbei Zhao
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China
| | - Yumei Hou
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China
| | - Sajjad Ahmad
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, People's Republic of China
| | - Yujie Cao
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China
| | - Zheng Yang
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China
| | - Hongqi Ai
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, People's Republic of China
| | - Liangquan Sheng
- Engineering Research Centre of Biomass Conversion and Pollution Prevention Control of Anhui Provincial Department of Education, Fuyang, 236037, People's Republic of China.
- School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, 236037, People's Republic of China.
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Wei H, Liu M, Zhang K, Li J, Ouyang X. Heterologous expression of family GH11 Aspergillus niger xylanase B (AnXylB11) in Pichia pastoris and competitive inhibition by riceXIP: An experimental and simulation study. Colloids Surf B Biointerfaces 2022; 220:112907. [DOI: 10.1016/j.colsurfb.2022.112907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/03/2022] [Accepted: 10/07/2022] [Indexed: 11/27/2022]
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Tian W, Zhang Z, Yang C, Li P, Xiao J, Wang R, Du P, Li N, Wang J. Engineering mesophilic GH11 xylanase from Cellulomonas flavigena by rational design of N-terminus substitution. Front Bioeng Biotechnol 2022; 10:1044291. [DOI: 10.3389/fbioe.2022.1044291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
Abstract
Xylanase, a glycoside hydrolase, is widely used in the food, papermaking, and textile industries; however, most xylanases are inactive at high temperatures. In this study, a xylanase gene, CFXyl3, was cloned from Cellulomonas flavigena and expressed in Escherichia coli BL21 (DE3). To improve the thermostability of xylanase, four hybrid xylanases with enhanced thermostability (designated EcsXyl1–4) were engineered from CFXyl3, guided by primary and 3D structure analyses. The optimal temperature of CFXyl3 was improved by replacing its N-terminus with the corresponding area of SyXyn11P, a xylanase that belongs to the hyperthermostable GH11 family. The optimal temperatures of the hybrid xylanases EcsXyl1–4 were 60, 60, 65, and 85°C, respectively. The optimal temperature of EcsXyl4 was 30 C higher than that of CFXyl3 (55°C) and its melting temperature was 34.5°C higher than that of CFXyl3. After the hydrolysis of beechwood xylan, the main hydrolysates were xylotetraose, xylotriose, and xylobiose; thus, these hybrid xylanases could be applied to prebiotic xylooligosaccharide manufacturing.
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Zheng F, Basit A, Zhuang H, Chen J, Zhang J, Chen W. Biochemical characterization of a novel acidophilic β-xylanase from Trichoderma asperellum ND-1 and its synergistic hydrolysis of beechwood xylan. Front Microbiol 2022; 13:998160. [PMID: 36199370 PMCID: PMC9527580 DOI: 10.3389/fmicb.2022.998160] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 08/15/2022] [Indexed: 11/29/2022] Open
Abstract
Acidophilic β-xylanases have attracted considerable attention due to their excellent activity under extreme acidic environments and potential industrial utilizations. In this study, a novel β-xylanase gene (Xyl11) of glycoside hydrolase family 11, was cloned from Trichoderma asperellum ND-1 and efficiently expressed in Pichia pastoris (a 2.0-fold increase). Xyl11 displayed a maximum activity of 121.99 U/ml at pH 3.0 and 50°C, and exhibited strict substrate specificity toward beechwood xylan (Km = 9.06 mg/ml, Vmax = 608.65 μmol/min/mg). The Xyl11 retained over 80% activity at pH 2.0–5.0 after pretreatment at 4°C for 1 h. Analysis of the hydrolytic pattern revealed that Xyl11 could rapidly convert xylan to xylobiose via hydrolysis activity as well as transglycosylation. Moreover, the results of site-directed mutagenesis suggested that the Xyl11 residues, Glu127, Glu164, and Glu216, are essential catalytic sites, with Asp138 having an auxiliary function. Additionally, a high degree of synergy (15.02) was observed when Xyl11 was used in association with commercial β-xylosidase. This study provided a novel acidophilic β-xylanase that exhibits excellent characteristics and can, therefore, be considered a suitable candidate for extensive applications, especially in food and animal feed industries.
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Affiliation(s)
- Fengzhen Zheng
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, China
- *Correspondence: Fengzhen Zheng,
| | - Abdul Basit
- Department of Microbiology, University of Jhang, Jhang, Pakistan
| | - Huan Zhuang
- Department of ENT and Head & Neck Surgery, The Children’s Hospital Zhejiang University School of Medicine, Zhejiang, Hangzhou, China
| | - Jun Chen
- Interdisciplinary Research Academy, Zhejiang Shuren University, Hangzhou, China
| | - Jianfen Zhang
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, China
| | - Weiqing Chen
- College of Biological and Environmental Engineering, Zhejiang Shuren University, Hangzhou, China
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11
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Tian Y, Xu J, Shi J, Kong M, Guo C, Cui C, Wang Y, Wang Y, Zhou C. Cloning, Expression, and Characterization of a GHF 11 Xylanase from Alteromonas macleodii HY35 in Escherichia coli. J GEN APPL MICROBIOL 2022; 68:134-142. [PMID: 35965062 DOI: 10.2323/jgam.2021.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A xylanase gene xynZT-1 from Alteromonas macleodii HY35 was cloned and expressed in Escherichia coli (E. coli). The sequencing results showed that the ORF of xynZT-1 was 831 bp. The xylanase DNA sequence encoded a 29 amino acids (aa) signal peptide and a 247-aa mature peptide. The XynZT-1 has been a calculated molecular weight (MW) of 27.93 kDa, isoelectric point (pI) of 5.11 and the formula C1266H1829N327O384S5. The amino acid sequence of the xynZT-1 had a high similarity with that of glycosyl hydrolase family 11 (GHF11) reported from other microorganisms. The DNA sequence encoding mature peptide was subcloned into pET-28a(+) expression vector. The resulted plasmid pET-28a-xynZT-1 was transformed into E. coli BL21(DE3), and the recombinant strain BL21(DE3)/xynZT-1 was obtained. The optimum temperature and pH of the recombinant XynZT-1 were 45 ℃ and 5.0, respectively.
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Affiliation(s)
- Yanjie Tian
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Jia Xu
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Jianing Shi
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Mengyuan Kong
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Changjiang Guo
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Caixia Cui
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Yongtao Wang
- The First Affiliated Hospital, Xinxiang Medical University
| | - Yan Wang
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
| | - Chenyan Zhou
- Synthetic Biology Engineering Laboratory of Henan Province, School of Life Science and Technology, Xinxiang Medical University
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12
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Effect of pretreatments on production of xylooligosaccharides and monosaccharides from corncob by a two-step hydrolysis. Carbohydr Polym 2022; 285:119217. [DOI: 10.1016/j.carbpol.2022.119217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Revised: 01/31/2022] [Accepted: 01/31/2022] [Indexed: 01/17/2023]
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13
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Wang J, Zhang S, Li C, Liu X, Xu Z, Wang T. Efficient secretion of xylanase in Escherichia coli for production of prebiotic xylooligosaccharides. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113481] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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14
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Shahid MK, Batool A, Kashif A, Nawaz MH, Aslam M, Iqbal N, Choi Y. Biofuels and biorefineries: Development, application and future perspectives emphasizing the environmental and economic aspects. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 297:113268. [PMID: 34280865 DOI: 10.1016/j.jenvman.2021.113268] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 06/11/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
The fossil fuel utilization adversely affected the environmental health due to the rising emission levels of greenhouse gases. Consequently, the challenges of climate change loaded great stress on renewable energy sources. It is noted that extreme consumption of fossil fuels increased the earth temperature by 1.9 °C that adversely influenced the life and biodiversity. Biorefinery is the sustainable process for the production of biofuels and other bio-products from biomass feedstock using different conversion technologies. Biofuel is an important component of renewable energy sources contributing to overall carbon-neutral energy system. Studies reported that on global scale, over 90% of petroleum goods could be produced from renewable resources by 2023, whereas, 33% chemicals, and 50% of the pharmaceutical market share is also expected to be bio-based. This study details the brief review of operation, development, application, limitations, future perspectives, circular bioeconomy, and life cycle assessment of biorefinery. The economic and environmental aspects of biofuels and biorefineries are briefly discussed. Lastly, considering the present challenges, the future perspectives of biofuels and biorefineries are highlighted.
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Affiliation(s)
- Muhammad Kashif Shahid
- Research Institute of Environment & Biosystem, Chungnam National University, Daejeon, Republic of Korea.
| | - Ayesha Batool
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Ayesha Kashif
- Department of Senior Health Care, Graduate School, Eulji University, Uijeongbu, Republic of Korea
| | - Muhammad Haq Nawaz
- Department of Physics, University of Gujrat, Hafiz Hayat Campus, Gujrat, Pakistan
| | - Muhammad Aslam
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Nafees Iqbal
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Younggyun Choi
- Department of Environmental & IT Engineering, Chungnam National University, Daejeon, Republic of Korea.
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15
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Aiewviriyasakul K, Bunterngsook B, Lekakarn H, Sritusnee W, Kanokratana P, Champreda V. Biochemical characterization of xylanase GH11 isolated from Aspergillus niger BCC14405 (XylB) and its application in xylooligosaccharide production. Biotechnol Lett 2021; 43:2299-2310. [PMID: 34718907 DOI: 10.1007/s10529-021-03202-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 10/22/2021] [Indexed: 01/03/2023]
Abstract
OBJECTIVE To develop an endo-β-1,4-xylanase with high specificity for production of prebiotic xylooligosaccharides that optimally works at moderate temperature desirable to reduce the energy cost in the production process. RESULTS The xylB gene, encoding for a glycosyl hydrolase family 11 xylanase from a thermoresistant fungus, Aspergillus niger BCC14405 was expressed in a methylotrophic yeast P. pastoris KM71 in a secreted form. The recombinant XylB showed a high specific activity of 3852 and 169 U mg-1 protein on beechwood xylan and arabinoxylan, respectively with no detectable side activities against different forms of cellulose (Avicel Ò PH101 microcrystalline cellulose, phosphoric acid swollen cellulose and carboxymethylcellulose). The enzyme worked optimally at 45 °C, pH 6.0. It showed a specific cleavage pattern by releasing xylobiose (X2) as the major product from xylooligosaccharides (X3 to X6) substrates. The highest XOS yield of 708 mg g-1 substrate comprising X2, X3 and X6 was obtained from beechwood xylan hydrolysis. CONCLUSION The enzyme is potent for XOS production and for saccharification of lignocellulosic biomass.
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Affiliation(s)
- Katesuda Aiewviriyasakul
- Enzyme Technology Research Team, Biorefinery Technology and Bioproduct Research Group, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand
| | - Benjarat Bunterngsook
- Enzyme Technology Research Team, Biorefinery Technology and Bioproduct Research Group, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand.
| | - Hataikarn Lekakarn
- Department of Biotechnology, Faculty of Science and Technology, Thammasat University, Rangsit Campus, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand
| | - Wipawee Sritusnee
- Enzyme Technology Research Team, Biorefinery Technology and Bioproduct Research Group, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand
| | - Pattanop Kanokratana
- Enzyme Technology Research Team, Biorefinery Technology and Bioproduct Research Group, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand
| | - Verawat Champreda
- Enzyme Technology Research Team, Biorefinery Technology and Bioproduct Research Group, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Luang, Pathumthani, 12120, Thailand
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16
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Wang L, Wang Y, Chang S, Gao Z, Ma J, Wu B, He B, Wei P. Identification and characterization of a thermostable GH11 xylanase from Paenibacillus campinasensis NTU-11 and the distinct roles of its carbohydrate-binding domain and linker sequence. Colloids Surf B Biointerfaces 2021; 209:112167. [PMID: 34715594 DOI: 10.1016/j.colsurfb.2021.112167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 09/06/2021] [Accepted: 10/16/2021] [Indexed: 01/13/2023]
Abstract
An extracellular thermostable xylanase (XynNTU) from Paenibacillus campinasensis NTU-11, consisted of a glycoside hydrolase (GH) family 11 catalytic domain, a Gly/Pro-rich linker sequence (LS) and a family 6 carbohydrate-binding module (CBM6), was identified and expressed in E. coli BL21. The purified XynNTU had a specific activity of 2750 U/mg and an optimal activity at 60 °C and pH 7.0, and retained a residual activity of 58.4% after incubation (60 °C, 48 h). Two truncated mutants, CBM6-truncated form XynNTU-CDLS, CBM6 and linker-truncated form XynNTU-CD, possessed similar values of optimum pH and temperature as the native XynNTU. XynNTU-CD displayed a lower thermostability than XynNTU, whereas for XynNTU-CDLS, more than 90% of residual activity was remained (60 °C, 48 h), indicating that this enzyme presented a higher thermostability than that of the majority of reported GH11 xylanases. Furthermore, XynNTU and two mutants maintained more than 70% of residual activity at pH values of 5-9. Kinetic measurements suggested that CBM6 had a crucial function in the ability of the enzyme to bind and hydrolyze xylan substrates, while LS had a relatively mild influence. Collectively, a noticeable thermostability and a high specific activity of XynNTU and its truncated form XynNTU-CDLS highlights their potentials for diverse industrial applications.
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Affiliation(s)
- Lijuan Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China
| | - Yiya Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China
| | - Siyuan Chang
- School of Health and Life Science, Nanjing Polytechnic Institute, 625 Geguan Road, Nanjing 210048, Jiangsu, China
| | - Zhen Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China.
| | - Jiangfeng Ma
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China.
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China
| | - Bingfang He
- School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, Jiangsu, China
| | - Ping Wei
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211810, Jiangsu, China
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17
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Wang L, Cao K, Pedroso MM, Wu B, Gao Z, He B, Schenk G. Sequence- and structure-guided improvement of the catalytic performance of a GH11 family xylanase from Bacillus subtilis. J Biol Chem 2021; 297:101262. [PMID: 34600889 PMCID: PMC8546418 DOI: 10.1016/j.jbc.2021.101262] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/25/2021] [Accepted: 09/27/2021] [Indexed: 12/02/2022] Open
Abstract
Xylanases produce xylooligosaccharides from xylan and have thus attracted increasing attention for their usefulness in industrial applications. Previously, we demonstrated that the GH11 xylanase XynLC9 from Bacillus subtilis formed xylobiose and xylotriose as the major products with negligible production of xylose when digesting corncob-extracted xylan. Here, we aimed to improve the catalytic performance of XynLC9 via protein engineering. Based on the sequence and structural comparisons of XynLC9 with the xylanases Xyn2 from Trichoderma reesei and Xyn11A from Thermobifida fusca, we identified the N-terminal residues 5-YWQN-8 in XynLC9 as engineering hotspots and subjected this sequence to site saturation and iterative mutagenesis. The mutants W6F/Q7H and N8Y possessed a 2.6- and 1.8-fold higher catalytic activity than XynLC9, respectively, and both mutants were also more thermostable. Kinetic measurements suggested that W6F/Q7H and N8Y had lower substrate affinity, but a higher turnover rate (kcat), which resulted in increased catalytic efficiency than WT XynLC9. Furthermore, the W6F/Q7H mutant displayed a 160% increase in the yield of xylooligosaccharides from corncob-extracted xylan. Molecular dynamics simulations revealed that the W6F/Q7H and N8Y mutations led to an enlarged volume and surface area of the active site cleft, which provided more space for substrate entry and product release and thus accelerated the catalytic activity of the enzyme. The molecular evolution approach adopted in this study provides the design of a library of sequences that captures functional diversity in a limited number of protein variants.
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Affiliation(s)
- Lijuan Wang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China
| | - Kun Cao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China
| | - Marcelo Monteiro Pedroso
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China.
| | - Zhen Gao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China.
| | - Bingfang He
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, Jiangsu, China
| | - Gerhard Schenk
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Brisbane, Queensland, Australia
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18
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Li C, Jiang S, Du C, Lu Z, He N, Zhou Y, Jiang S S, Zhang G G. High-Level Extracellular Expression of a New β-N-Acetylglucosaminidase in Escherichia coli for Producing GlcNAc. Front Microbiol 2021; 12:648373. [PMID: 33776979 PMCID: PMC7996098 DOI: 10.3389/fmicb.2021.648373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/17/2021] [Indexed: 11/13/2022] Open
Abstract
N-acetyl-β-D glucosamine (GlcNAc) is wildly used in cosmetics, nutraceuticals and pharmaceuticals. The traditional chemical process for GlcNAc production from chitin causes serious acidic pollution. Therefore, the enzymatic hydrolysis becomes a great promising and alternative strategy to produce GlcNAc. β-N-acetylglucosaminidase (NAGase) can hydrolyze chitin to produce GlcNAc. Here, a GH3 family NAGase encoding gene BlNagZ from Bacillus licheniformis was expressed extracellularly in Escherichia coli guided by signal peptide PelB. The recombinant BlNagZ presented the best activity at 60°C and pH 5.5 with a high specific activity of 13.05 U/mg. The BlNagZ activity in the fermentation supernatant can reach 13.62 U/mL after optimizing the culture conditions, which is 4.25 times higher than optimization before. Finally, combining BlNagZ with chitinase ChiA we identified before, chitin conversion efficiency to GlcNAc can reach 89.2% within 3.5 h. In all, this study provided not only a high active NAGase, and a secreted expression strategy to reduce the cost of production, which is conducive to the industrial application.
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Affiliation(s)
- Congna Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Shun Jiang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Chao Du
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Zhenghui Lu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Nisha He
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Yuling Zhou
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Sijing Jiang S
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
| | - Guimin Zhang G
- State Key Laboratory of Biocatalysis and Enzyme Engineering, College of Life Sciences, Hubei University, Wuhan, China
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19
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Lopes AMM, Martins M, Goldbeck R. Heterologous Expression of Lignocellulose-Modifying Enzymes in Microorganisms: Current Status. Mol Biotechnol 2021; 63:184-199. [PMID: 33484441 DOI: 10.1007/s12033-020-00288-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2020] [Indexed: 02/06/2023]
Abstract
Heterologous expression of the carbohydrate-active enzymes in microorganisms is a promising approach to produce bio-based compounds, such as fuels, nutraceuticals and other value-added products from sustainable lignocellulosic sources. Several microorganisms, including Saccharomyces cerevisiae, Escherichia coli, and the filamentous fungi Aspergillus nidulans, have unique characteristics desirable for a biorefinery production approach like well-known genetic tools, thermotolerance, high fermentative capacity and product tolerance, and high amount of recombinant enzyme secretion. These microbial factories are already stablished in the heterologous production of the carbohydrate-active enzymes to produce, among others, ethanol, xylooligosaccharides and the valuable coniferol. A complete biocatalyst able to heterologous express the CAZymes of glycoside hydrolases, carbohydrate esterases and auxiliary activities families could release these compounds faster, with higher yield and specificity. Recent advances in the synthetic biology tools could expand the number and diversity of enzymes integrated in these microorganisms, and also modify those already integrated. This review outlines the heterologous expression of carbohydrate-active enzymes in microorganisms, as well as recent updates in synthetic biology.
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Affiliation(s)
- Alberto Moura Mendes Lopes
- Bioprocess and Metabolic Engineering Laboratory, School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato no 80, Cidade Universitária, Campinas, São Paulo, 13083-862, Brazil
| | - Manoela Martins
- Bioprocess and Metabolic Engineering Laboratory, School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato no 80, Cidade Universitária, Campinas, São Paulo, 13083-862, Brazil
| | - Rosana Goldbeck
- Bioprocess and Metabolic Engineering Laboratory, School of Food Engineering, University of Campinas (UNICAMP), Rua Monteiro Lobato no 80, Cidade Universitária, Campinas, São Paulo, 13083-862, Brazil.
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20
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Liu Z, Li J, Jie C, Wu B, Hao N. A multifunctional α-amylase BSGH13 from Bacillus subtilis BS-5 possessing endoglucanase and xylanase activities. Int J Biol Macromol 2021; 171:166-176. [PMID: 33421464 DOI: 10.1016/j.ijbiomac.2021.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/25/2020] [Accepted: 01/01/2021] [Indexed: 10/22/2022]
Abstract
Exploring new multifunctional enzymes and understanding the mechanisms of catalytic promiscuity will be of enormous industrial and academic values. In the present study, we reported the discovery and characterization of a multifunctional enzyme BSGH13 from Bacillus subtilis BS-5. Remarkably, BSGH13 possessed α-amylase, endoglucanase, and xylanase activities. To our knowledge, this was the first report on an amylase from Bacillus species having additional endoglucanase and xylanase activities. Subsequently, we analyzed the effects of aromatic residues substitution at each site of the active site architecture on ligand-binding affinity and catalytic specificity of BSGH13 by a combination of virtual mutation and site-directed mutagenesis approaches. Our results indicated that the introduction of aromatic amino acids Phe or Trp at the positions L182 and L183 altered the local interaction network of BSGH13 towards different substrates, thus changing the multifunctional properties of BSGH13. Moreover, we provided an expanded perspective on studies of multifunctional enzymes.
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Affiliation(s)
- Zhaoxing Liu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan road, Nanjing 211816, Jiangsu, China
| | - Jiahuang Li
- School of Biopharmacy, China Pharmaceutical University, 639 Longmian avenue, Nanjing 211198, Jiangsu, China
| | - Chen Jie
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan road, Nanjing 211816, Jiangsu, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan road, Nanjing 211816, Jiangsu, China.
| | - Ning Hao
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhunan road, Nanjing 211816, Jiangsu, China.
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21
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Santibáñez L, Henríquez C, Corro-Tejeda R, Bernal S, Armijo B, Salazar O. Xylooligosaccharides from lignocellulosic biomass: A comprehensive review. Carbohydr Polym 2021; 251:117118. [DOI: 10.1016/j.carbpol.2020.117118] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/22/2020] [Accepted: 09/04/2020] [Indexed: 02/04/2023]
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22
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Lai Z, Zhou C, Ma X, Xue Y, Ma Y. Enzymatic characterization of a novel thermostable and alkaline tolerant GH10 xylanase and activity improvement by multiple rational mutagenesis strategies. Int J Biol Macromol 2020; 170:164-177. [PMID: 33352153 DOI: 10.1016/j.ijbiomac.2020.12.137] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/08/2020] [Accepted: 12/17/2020] [Indexed: 11/15/2022]
Abstract
Thermo-alkaline xylanases are widely applied in paper pulping industry. In this study, a novel thermostable and alkaline tolerant GH10 xylanase (Xyn30Y5) gene from alkaliphilic Bacillus sp. 30Y5 was cloned and the surface-layer homology (SLH) domains truncated enzyme (Xyn30Y5-SLH) was expressed in Escherichia coli. The purified Xyn30Y5-SLH was most active at 70 °C and pH 7.0 and showed the highest specific activity of 349.4 U mg-1. It retained more than 90% activity between pH 6.0 to 9.5 and was stable at pH 6.0-10.0. To improve the activity, 47 mutants were designed based on eight rational strategies and 21 mutants showed higher activity. By combinatorial mutagenesis, the best mutant 3B demonstrated specific activity of 1016.8 U mg-1 with a doubled catalytic efficiency (kcat/Km) and RA601/2h value, accompanied by optimal pH shift to 8.0. The molecular dynamics simulation analysis indicated that the increase of flexibility of α5 helix and loop7 located near to the catalytic residues is likely responsible for its activity improvement. And the decrease of flexibility of the most unstable regions is vital for the thermostablity improvement. This work provided not only a novel thermostable and alkaline tolerant xylanase with industrial application potential but also an effective mutagenesis strategy for xylanase activity improvement.
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Affiliation(s)
- Zhihua Lai
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Cheng Zhou
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Xiaochen Ma
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yanfen Xue
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yanhe Ma
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; National Engineering Laboratory for Industrial Enzymes, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
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23
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Jooybari NM, Amini K, Falsafi S. Determining the L-arabinose isomerase in bacilli isolates from Gandom Beryan area of Kerman (Iran) by Molecular method and its cloning in Escherichia coli xl1 blue. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Ding SS, Zhu JP, Wang Y, Wu B, Zhao Z. Immobilization of the extracellular recombinant Lucky9 xylanase from Bacillus subtilis enhances activity at high temperature and pH. FEBS Open Bio 2020; 10:2733-2739. [PMID: 33091216 PMCID: PMC7714079 DOI: 10.1002/2211-5463.13010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/08/2020] [Accepted: 10/20/2020] [Indexed: 11/08/2022] Open
Abstract
In the paper industry, chlorine is often used to treat the pulp for bleaching. After pulping, a large amount of xylan is present in the fiber. Xylanase can be used to degrade xylan in an eco-friendly process called biobleaching, which can help minimize the usage of chlorine in the delignification process. However, a bottleneck in the adoption of biobleaching is the cost of xylanase and the requirement that xylanase be active and stable at extreme conditions. Here, we investigated whether using sodium alginate beads to immobilize an extracellular xylanase from Bacillus subtilis (Lucky9) can reduce the potential cost of enzyme usage. The optimal pH and the activity of the immobilized enzyme were increased at optimal temperature compared with the free enzyme. In addition, immobilized xylanase was shown to be more stable than free xylanase. The results of this study suggest that the immobilized xylanase has potential applications in the biobleaching industry.
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Affiliation(s)
- Sai-Sai Ding
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Jin-Peng Zhu
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Yang Wang
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
| | - Bin Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, China
| | - Zongpei Zhao
- School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang, China
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25
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Monica P, Kapoor M. Alkali-stable GH11 endo-β-1,4 xylanase (XynB) from Bacillus subtilis strain CAM 21: application in hydrolysis of agro-industrial wastes, fruit/vegetable peels and weeds. Prep Biochem Biotechnol 2020; 51:475-487. [PMID: 33043796 DOI: 10.1080/10826068.2020.1830416] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
GH11 endo-xylanases, due to their inherent structural and biochemical properties, are the key to efficient bioconversion of lignocellulosic biomass into value-added products. A GH11 endo-xylanase (XynB) from Bacillus subtilis strain CAM 21 was cloned, over-expressed and purified (Mw∼24 kDa) using Ni-NTA affinity chromatography. XynB showed optimum activity at pH 7.0 and 50°C and was stable (>88%) in a broad range of pH (4-11). The apparent Km, Kcat and Kcat/Km of XynB were 2.9 mg/ml, 1961.2/sec, and 675.62 ml/mg/sec, respectively using birchwood xylan as substrate. XynB was a classical endo-xylanase as it hydrolyzed birchwood xylan to xylo-oligosaccharides and not xylose. Kinetic stability of XynB at 45-53°C was between 43-182 min. Secondary structure analysis of XynB using far-UV CD spectroscopy revealed presence of 51.85% β strands and 2.64% α helix and was consistent with the homology modeling studies. XynB hydrolyzed the xylan extracted from agro-industrial wastes and fruit/vegetable peels by releasing up to 670 mg/g of reducing sugars. The xylan extracted from weeds (Ageratum conyzoides, Achyranthes aspera and Tridax procumbens) had characteristic signatures of hemicelluloses and after XynB hydrolysis showed cracks, peeling and release of up to 135.2 mg/g reducing sugars.
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Affiliation(s)
- P Monica
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR - Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, India
| | - Mukesh Kapoor
- Department of Protein Chemistry and Technology, CSIR-Central Food Technological Research Institute, Mysuru, India.,Academy of Scientific and Innovative Research (AcSIR), CSIR - Human Resource Development Centre (CSIR-HRDC) Campus, Ghaziabad, India
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26
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Chen S, Feng H, Li X, Chao HJ, Wu J, Liu J, Zhu WJ, Yan DZ. The Complete Genome Sequence of a Bacterial Strain with High Alkalic Xylanase Activity Isolated from the Sludge Near a Papermill. Curr Microbiol 2020; 77:3945-3952. [PMID: 33011835 DOI: 10.1007/s00284-020-02227-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/23/2020] [Indexed: 11/28/2022]
Abstract
Many organisms secrete xylanase, an import group of proteins hydrolyzing xylan, and thus are able to use xylan as their carbon source. In this study, we sequenced the whole genome of a bacterial strain, YD01, which was isolated from the sludge near the sewage discharge outlet of a papermill and showed high alkalic xylanase activity. Its genome consists of a chromosome and two plasmids. Six rRNA genes, 46 tRNA genes, 3136 CDSs as well as 955 repetitive sequences were predicted. 3046 CDSs were functionally annotated. Phylogenetic analysis on 16S rRNA shows that YD01 is a new species in Microbacterium genus and is taxonomically close to M. jejuense THG-C31T and M. kyungheense THG-C26T. A comparative study on phylogenetic trees of 16S rRNA and xylanase genes suggests that xylanase genes in YD01 may originate from horizontal gene transfer instead of ancestral gene duplication.
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Affiliation(s)
- Si Chen
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Hao Feng
- Jiangsu Yanghe Brewery Joint-Stock Co., Ltd., Suqian, 223800, Jiangsu, China
| | - Xin Li
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Hong-Jun Chao
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Jing Wu
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Jun Liu
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Wen-Jun Zhu
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
| | - Da-Zhong Yan
- School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China.
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Zhu D, Adebisi WA, Ahmad F, Sethupathy S, Danso B, Sun J. Recent Development of Extremophilic Bacteria and Their Application in Biorefinery. Front Bioeng Biotechnol 2020; 8:483. [PMID: 32596215 PMCID: PMC7303364 DOI: 10.3389/fbioe.2020.00483] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 04/27/2020] [Indexed: 12/22/2022] Open
Abstract
The biorefining technology for biofuels and chemicals from lignocellulosic biomass has made great progress in the world. However, mobilization of laboratory research toward industrial setup needs to meet a series of criteria, including the selection of appropriate pretreatment technology, breakthrough in enzyme screening, pathway optimization, and production technology, etc. Extremophiles play an important role in biorefinery by providing novel metabolic pathways and catalytically stable/robust enzymes that are able to act as biocatalysts under harsh industrial conditions on their own. This review summarizes the potential application of thermophilic, psychrophilic alkaliphilic, acidophilic, and halophilic bacteria and extremozymes in the pretreatment, saccharification, fermentation, and lignin valorization process. Besides, the latest studies on the engineering bacteria of extremophiles using metabolic engineering and synthetic biology technologies for high-efficiency biofuel production are also introduced. Furthermore, this review explores the comprehensive application potential of extremophiles and extremozymes in biorefinery, which is partly due to their specificity and efficiency, and points out the necessity of accelerating the commercialization of extremozymes.
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Affiliation(s)
- Daochen Zhu
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, China
| | - Wasiu Adewale Adebisi
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Fiaz Ahmad
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Sivasamy Sethupathy
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Blessing Danso
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Jianzhong Sun
- Biofuels Institute, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
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Jacomini D, Bussler L, Corrêa JM, Kadowaki MK, Maller A, da-Conceição Silva JL, Simão RDCG. Cloning, expression and characterization of C. crescentus xynA2 gene and application of Xylanase II in the deconstruction of plant biomass. Mol Biol Rep 2020; 47:4427-4438. [PMID: 32424521 DOI: 10.1007/s11033-020-05507-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/08/2020] [Indexed: 11/24/2022]
Abstract
Biotechnology offers innovative alternatives for industrial bioprocesses mainly because it uses enzymes that biodegrade the hemicellulose releasing fermentable sugars. Caulobacter crescentus (C. crescentus) has seven genes responsible for xylanolytic cleavage, 5 to β-xylosidases (EC 3.2.1.37) and 2 for endoxylanases, like xynA2 (CCNA_03137) that encodes Xylanase II (EC 3.2.1.8) of the glycohydrolases-GH10 group. The xynA2 gene was amplified by PCR, cloned into the pTrcHisA vector e efficiently overexpressed in E. coli providing a His-tag fusion protein. Recombinant xylanase (XynA2) was purified by affinity chromatography using a nickel sepharose column and exhibited a single 43 kDa band on SDS-PAGE gel. XynA2 showed an optimum alkaline pH (8) and stability at alkaline pH for 24 h. Although C. crescentus is mesophilic, XynA2 has optimum temperature of 60 °C and is thermo-resistance at 65 °C. XynA maintains 66% of the enzymatic activity at high temperatures (90 °C) without being denatured.The enzyme displayed a xylanolitic activity free of cellulase to xylan from beechwood and it was not inhibited in the presence of 50 μmol mL-1 of xylose. In addition, dithiothreitol (DTT) induced XynA2 activity, as it improved its kinetic parameters by lowering the KM (5.78 μmol mL-1) and increasing the KCat/KM ratio (1.63 U s-1). Finally, C. crescentus XynA2 efficiently hydrolyzed corn straw with high release of reducing sugars that can be applied in different branches of the industry.
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Affiliation(s)
- Débora Jacomini
- Laboratório de Bioquímica Molecular, Centro de Ciências Exatas e Tecnológicas, Universidade Estadual do Oeste do Paraná, Cascavel,, Paraná, 85814-110, Brazil
| | - Larissa Bussler
- Laboratório de Bioquímica Molecular, Centro de Ciências Exatas e Tecnológicas, Universidade Estadual do Oeste do Paraná, Cascavel,, Paraná, 85814-110, Brazil
| | - Juliana Moço Corrêa
- Laboratório de Bioquímica Molecular, Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Rua Universitária, 2069, Cascavel, PR, 85814-110, Brazil
| | - Marina Kimiko Kadowaki
- Laboratório de Bioquímica Molecular, Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Rua Universitária, 2069, Cascavel, PR, 85814-110, Brazil
| | - Alexandre Maller
- Laboratório de Bioquímica Molecular, Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Rua Universitária, 2069, Cascavel, PR, 85814-110, Brazil
| | - José Luis da-Conceição Silva
- Laboratório de Bioquímica Molecular, Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Rua Universitária, 2069, Cascavel, PR, 85814-110, Brazil
| | - Rita de Cássia Garcia Simão
- Laboratório de Bioquímica Molecular, Centro de Ciências Exatas e Tecnológicas, Universidade Estadual do Oeste do Paraná, Cascavel,, Paraná, 85814-110, Brazil. .,Laboratório de Bioquímica Molecular, Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Rua Universitária, 2069, Cascavel, PR, 85814-110, Brazil.
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Zhang F, He H, Deng T, Ge H, Yu C, Feng L, Huang F, Yi L. N-Terminal Fused Signal Peptide Prompted Extracellular Production of a Bacillus-Derived Alkaline and Thermo Stable Xylanase in E. coli Through Cell Autolysis. Appl Biochem Biotechnol 2020; 192:339-352. [PMID: 32382941 DOI: 10.1007/s12010-020-03323-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 04/23/2020] [Indexed: 01/06/2023]
Abstract
Xylanases are extensively used as industrial enzymes for its ability of hydrolyzing xylan to oligosaccharides. Here, XynHB, a thermo and alkaline stable xylanase derived from Bacillus pumilus HBP8, was extracellularly produced in E. coli cells through N-terminal-fused signal peptides. We found that the matured XynHB itself could be auto-secreted out of E. coli BL21(DE3) cells at a very low level, and two Sec-pathway signal peptides, PelB and OmpA, and one dual Sec-Tat-pathway signal peptide, FhuD, could effectively prompt its extracellular production up to 12-fold. Our results showed that PelB signal peptide led to the highest extracellular production of XynHB for approximately 54.1 μg/mL, and FhuD-fused XynHB possessed the highest specific activity of 1746.0 U/mg at 70 °C. Meanwhile, our studies also indicated that PelB- and FhuD-fused XynHB might disrupt E. coli cells' periplasm during their secretion process, thus causing cell lysis to facilitate their extracellular production. Moreover, further characterization revealed that the extracellular production of XynHB was not affected by the outer membrane permeability of E. coli cells. Our studies provided an advantageous strategy for the extracellular production of xylanase in E. coli, which may also be used for E. coli autolysis in the future.
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Affiliation(s)
- Faying Zhang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China
| | - Huahua He
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China
| | - Ting Deng
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China
| | - Haoran Ge
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China
| | - Chan Yu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China
| | - Liang Feng
- School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Fenghong Huang
- Hubei Key Laboratory of Lipid Chemistry and Nutrition, Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, 430062, China
| | - Li Yi
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Engineering Research Center for Bio-enzyme Catalysis, College of Life Sciences, Hubei University, NO. 368 Youyi Road, Wuchang District, Wuhan, 430062, Hubei, China.
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30
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Liu L, Xu M, Cao Y, Wang H, Shao J, Xu M, Zhang Y, Wang Y, Zhang W, Meng X, Liu W. Biochemical Characterization of Xylanases from Streptomyces sp. B6 and Their Application in the Xylooligosaccharide Production from Viscose Fiber Production Waste. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:3184-3194. [PMID: 32105462 DOI: 10.1021/acs.jafc.9b06704] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Enzymatic hydrolysis of xylan represents a promising way to produce xylooligosaccharide (XOS), which is a novel ingredient in functional food. However, the recalcitrance of xylan in natural lignocellulosic biomass entails effective and robust xylanases. In the present study, we reported the isolation of a thermophilic Streptomyces sp. B6 from mushroom compost producing high xylanase activity. Two xylanases of Streptomyces sp. B6 belonging to GH10 (XynST10) and GH11 (XynST11) families were thus identified and biochemically characterized to be robust enzymes with high alkaline- and thermostability. Direct hydrolysis of neutralized viscose fiber production waste using XynST10 and XynST11 showed that while XynST10 produced 23.22 g/L XOS with a degree of polymerization (DP) of 2-4 and 9.27 g/L xylose, XynST11 produced much less xylose (1.19 g/L) and a higher amounts of XOS with a DP = 2-4 (28.29 g/L). Thus, XynST11 holds great potential for the production of XOS from agricultural and industrial waste.
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Affiliation(s)
- Lin Liu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Mingyuan Xu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Yanli Cao
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Hai Wang
- Qingdao Vland Biotech Company Group, No. 29 Miaoling Road, Qingdao 266061, People's Republic of China
| | - Jing Shao
- Qingdao Vland Biotech Company Group, No. 29 Miaoling Road, Qingdao 266061, People's Republic of China
| | - Meiqing Xu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Yuancheng Zhang
- Leling Shengli New Energy Company, Limited, Yangan, Leling, Dezhou 253614, People's Republic of China
| | - Yunhe Wang
- Leling Shengli New Energy Company, Limited, Yangan, Leling, Dezhou 253614, People's Republic of China
| | - Weixin Zhang
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Xiangfeng Meng
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
| | - Weifeng Liu
- State Key Laboratory of Microbial Technology, Microbial Technology Institute, Shandong University, No.72 Binhai Road, Qingdao 266237, People's Republic of China
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Ma L, Aizhan R, Wang X, Yi Y, Shan Y, Liu B, Zhou Y, Lü X. Cloning and characterization of low-temperature adapted GH5-CBM3 endo-cellulase from Bacillus subtilis 1AJ3 and their application in the saccharification of switchgrass and coffee grounds. AMB Express 2020; 10:42. [PMID: 32140794 PMCID: PMC7058755 DOI: 10.1186/s13568-020-00975-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 02/21/2020] [Indexed: 01/27/2023] Open
Abstract
Endocellulase is a key cellulase for cellulosic material pretreatment in the industry by hydrolyzing long cellulose chains into short chains. To investigate the endocellulase characteristics from Bacillus subtilis 1AJ3, and increase its production yield, this paper cloned an endocellulase gene denoted CEL-5A from strain 1AJ3 and expressed in E. coli BL21 (DE3). The CEL-5A gene was sequenced with a full-length of 1500 bp, encoding a totally of 500 amino acids, and containing two domains: the GH5 family catalytic domain (CD) and the CBM3 family cellulose-binding domain (CBD). Recombinant endocellulase Cel-5A with a His-tag was purified of the Ni-NTA column, and SDS-PAGE results demonstrated that Cel-5A exhibited a molecular weight of 56.4 kDa. The maximum enzyme activity of Cel-5A was observed at pH 4.5 and 50 °C. Moreover, it was active over the broad temperature region of 30–60 °C, and stable within the pH range of 4.5–10.0. In addition, Co2+ was able to increase enzyme activity, while the majority of metal ions demonstrated stable enzyme activity under low- concentration. The substrate specificity of Cel-5A exhibited a high specific activity on the β-1,3-1,4 glucan linkage from barley. The Michaelis–Menten constant and the maximum velocity of the recombinant Cel-5A for CMC-Na were determined as 14.87 mg/mL and 19.19 μmol/min/mg, respectively. When Cel-5A was applied to the switchgrass and coffee grounds, its color became lighter and the biomass was observed to loosen following hydrolyzation. The saccharification rate reached 12% of the total weight of switchgrass in 20 h. These properties highlight the potential application of Cel-5A as an endocellulase in the pretreatment of biomass, for example, in the coffee grounds/waste, and related industries.
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32
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An endoxylanase rapidly hydrolyzes xylan into major product xylobiose via transglycosylation of xylose to xylotriose or xylotetraose. Carbohydr Polym 2020; 237:116121. [PMID: 32241400 DOI: 10.1016/j.carbpol.2020.116121] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 02/28/2020] [Accepted: 03/03/2020] [Indexed: 12/18/2022]
Abstract
Here, we proposed an effective strategy to enhance a novel endoxylanase (Taxy11) activity and elucidated an efficient catalysis mechanism to produce xylooligosaccharides (XOSs). Codon optimization and recruitment of natural propeptide in Pichia pastoris resulted in achievement of Taxy11 activity to 1405.65 ± 51.24 U/mL. Analysis of action mode reveals that Taxy11 requires at least three xylose (xylotriose) residues for hydrolysis to yield xylobiose. Results of site-directed mutagenesis indicate that residues Glu119, Glu210, and Asp53 of Taxy11 are key catalytic sites, while Asp203 plays an auxiliary role. The novel mechanism whereby Taxy11 catalyzes conversion of xylan or XOSs into major product xylobiose involves transglycosylation of xylose to xylotriose or xylotetraose as substrate, to form xylotetraose or xylopentaose intermediate, respectively. Taxy11 displayed highly hydrolytic activity toward corncob xylan, producing 50.44 % of xylobiose within 0.5 h. This work provides a cost-effective and sustainable way to produce value-added biomolecules XOSs (xylobiose-enriched) from agricultural waste.
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33
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Recombinant xylanase production by Escherichia coli using a non-induced expression system with different nutrient sources. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2020. [DOI: 10.1007/s43153-019-00004-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Zhu F, Deng H, He X, Song X, Chen N, Wang W. High-level expression of Thermobifida fusca glucose isomerase for high fructose corn syrup biosynthesis. Enzyme Microb Technol 2019; 135:109494. [PMID: 32146933 DOI: 10.1016/j.enzmictec.2019.109494] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 01/02/2023]
Abstract
Glucose isomerase (GIase), an efficient enzyme in the isomerization of d-glucose to d-fructose, has been widely used in food processing. In this study, an efficient expression system for a Thermobifida fusca GIase (GIaseTfus) in Escherichia coli was firstly designed via a two-stage feeding strategy for improving expression level. The cultivation strategy was performed at an exponential feeding rate during the pre-induction phase, followed by a gradient-decreasing feeding rate at the induction phase in a 3-L fermenter. During this process, the effect of induction conditions and the complex nitrogen supplementation in feeding solutions on GIaseTfus production were investigated and optimized. Under the optimal conditions, the yield of GIaseTfus reached 124.1 U/mL, which is the highest expression level of GIase by recombinant E. coli reported to date. Additionally, the obtained GIaseTfus was performed to produce high fructose corn syrup (HFCS) with conversion approacing 55 % from glucose (45 %, w/v) to fructose. According to the molecular dynamic simulation, a number of hydrogen bonds existed in the enzyme-substrate complex could stablilize the transient states, and a appreciate reaction distance of M1 catalytic site and oxygen atom of glucose make the reaction proceed easily, thus resulting in the efficient biosynthesis of HFCS. The function of GIaseTfus renders it a valuable catalyst for HFCS-55 (containing 55 % d-fructose) manufacturing, the most favorable industrial product of HFCS. The efficient expression of GIaseTfus and its efficient HFCS production lays the foundation for its proming industrial application.
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Affiliation(s)
- Fucheng Zhu
- College of Biology and Pharmaceutical Engineering, Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, West Anhui University, Lu'an City 237012, China
| | - Hui Deng
- College of Biology and Pharmaceutical Engineering, Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, West Anhui University, Lu'an City 237012, China
| | - Xiaomei He
- College of Biology and Pharmaceutical Engineering, Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, West Anhui University, Lu'an City 237012, China
| | - Xiangwen Song
- College of Biology and Pharmaceutical Engineering, Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, West Anhui University, Lu'an City 237012, China
| | - Naifu Chen
- College of Biology and Pharmaceutical Engineering, Anhui Engineering Laboratory for Conservation and Sustainable Utilization of Traditional Chinese Medicine Resources, West Anhui University, Lu'an City 237012, China.
| | - Weiyun Wang
- School of Life Sciences, Anhui Agricultural University, Hefei 230036, China.
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35
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Secretory expression of biologically active chondroitinase ABC I for production of chondroitin sulfate oligosaccharides. Carbohydr Polym 2019; 224:115135. [DOI: 10.1016/j.carbpol.2019.115135] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/26/2019] [Accepted: 07/26/2019] [Indexed: 12/14/2022]
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36
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Characterization of a novel multi-domain xylanase from Clostridium clariflavum with application in hydrolysis of corn cobs. Biotechnol Lett 2019; 41:1177-1186. [DOI: 10.1007/s10529-019-02721-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 08/08/2019] [Indexed: 10/26/2022]
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37
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Wu B, Yu Q, Chang S, Pedroso MM, Gao Z, He B, Schenk G. Expansin assisted bio-affinity immobilization of endoxylanase from Bacillus subtilis onto corncob residue: Characterization and efficient production of xylooligosaccharides. Food Chem 2019; 282:101-108. [DOI: 10.1016/j.foodchem.2019.01.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 11/13/2018] [Accepted: 01/03/2019] [Indexed: 01/07/2023]
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38
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Le B, Yang S. Production of prebiotic xylooligosaccharide from aqueous ammonia‐pretreated rice straw by β‐xylosidase of
Weissella cibaria. J Appl Microbiol 2019; 126:1861-1868. [DOI: 10.1111/jam.14255] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 02/06/2019] [Accepted: 02/13/2019] [Indexed: 11/30/2022]
Affiliation(s)
- B. Le
- Department of Biotechnology Chonnam National University Yeosu, Chonnam Republic of Korea
| | - S.H. Yang
- Department of Biotechnology Chonnam National University Yeosu, Chonnam Republic of Korea
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Rahmani N, Kahar P, Lisdiyanti P, Lee J, Prasetya B, Ogino C, Kondo A. GH-10 and GH-11 Endo-1,4-β-xylanase enzymes from Kitasatospora sp. produce xylose and xylooligosaccharides from sugarcane bagasse with no xylose inhibition. BIORESOURCE TECHNOLOGY 2019; 272:315-325. [PMID: 30384206 DOI: 10.1016/j.biortech.2018.10.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/02/2018] [Accepted: 10/03/2018] [Indexed: 05/10/2023]
Abstract
A novel strategy for the low-cost, high-yield co-production of xylose and xylooligosaccharides together with no xylose inhibition was developed using a novel heterologous expression of XYN10Ks_480 endo-1,4-β-xylanase with a ricin-type β-trefoil type of domain and XYN11Ks_480 endo-1,4-β-xylanase with a CBM 2 superfamily from the Kitasatospora sp in an actinomycetes expression system. Xylose is the main building block for hemicellulose xylan. Our findings demonstrated high levels of expression and catalytic activity for XYN10Ks_480 during hydrolysis of the extracted xylan of bagasse, and three types of xylan-based substrates were used to produce xylose and xylooligosaccharides. However, hydrolysis by XYN11Ks_480 produced xylooligosaccharides without xylose formation. This study demonstrated how integrating sodium hypochlorite-extracted xylan and enzymatic hydrolysis could provide an alternative strategy for the generation of XOS from lignocellulosic material.
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Affiliation(s)
- Nanik Rahmani
- Research Center for Biotechnology, Indonesian Institute of Sciences, Cibinong Science Center. Jl. Raya Bogor Km. 46, Cibinong 16911, West Java, Indonesia
| | - Prihardi Kahar
- Department of Chemical and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Puspita Lisdiyanti
- Research Center for Biotechnology, Indonesian Institute of Sciences, Cibinong Science Center. Jl. Raya Bogor Km. 46, Cibinong 16911, West Java, Indonesia
| | - Jaemin Lee
- Department of Chemical and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
| | - Bambang Prasetya
- Research Center for Biotechnology, Indonesian Institute of Sciences, Cibinong Science Center. Jl. Raya Bogor Km. 46, Cibinong 16911, West Java, Indonesia; National Standardization Agency of Indonesia, Gedung I BPPT Jl. M.H. Thamrin No. 8, Kebun Sirih, Jakarta 10340, Indonesia
| | - Chiaki Ogino
- Department of Chemical and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
| | - Akihiko Kondo
- Department of Chemical and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan; Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan
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Cell Separation and Disruption, Product Recovery, and Purification. ESSENTIALS IN FERMENTATION TECHNOLOGY 2019. [DOI: 10.1007/978-3-030-16230-6_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Xylanase and Fermented Polysaccharide of Hericium caputmedusae Reduce Pathogenic Infection of Broilers by Improving Antioxidant and Anti-Inflammatory Properties. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4296985. [PMID: 30693063 PMCID: PMC6332932 DOI: 10.1155/2018/4296985] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 09/12/2018] [Accepted: 10/18/2018] [Indexed: 12/20/2022]
Abstract
Background Pathogenic infection in broilers has become an important issue in the development of poultry industry. Xylooligosaccharides released from xylan via xylanase and fermented polysaccharide of Hericium caputmedusae (FPHC) have antimicrobial potential against many pathogens. Objective We aimed to explore the effects of xylanase and FPHC on pathogenic infection in the broilers (Gallus gallus domesticus). Methods Three hundred and thirty 21-day male broilers were assigned into four groups: control group (CG, basic diet), xylanase group (XG, basic diet + xylanase), FPHC group (HG, basic diet + FPHC), and XHG group (basic diet + xylanase + FPHC). Average daily feed intake (ADFI) and daily gain (ADG) were measured. Microflora from broiler feces was analyzed using 16S rRNA sequencing. Serum tumor necrosis factor- (TNF-) α, interleukin-1β (IL-1β), IL-1 receptor antagonist (IL-1ra), IL-10, total antioxidant capacity (T-AOC), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), and malondialdehyde (MDA) contents were detected using kits. The variables were compared using the Student t-test between two groups. Results Microbiological investigations showed that 75% of broilers were affected by bacterial pathogens in the CG group, most notably by coagulase-negative staphylococci. Comparatively, 15%, 26%, and 5% of broilers were affected by bacterial pathogens in the XG, HG, and XHG groups, respectively. Xylanase and FPHC treatment increased the ratio of ADG to ADFI and antioxidant capacity by increasing the levels of T-AOC, SOD, and GSH-Px and reducing the levels of MDA (P < 0.05). Xylanase and FPHC treatment improved anti-inflammatory capacity by increasing serum levels of IL-1ra and IL-10 and reducing the levels of IL-1β and TNF-α. On the other hand, the treatment increased probiotic concentration of Bacillus licheniformis, Bacillus subtilis, and Lactobacillus plantarum (P < 0.05), which were also proved in cell culture. Conclusions Xylanase and FPHC ameliorate pathogen infection by increasing antioxidant and anti-inflammatory activities of broilers via the increase of probiotics.
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Liu X, Liu Y, Jiang Z, Liu H, Yang S, Yan Q. Biochemical characterization of a novel xylanase from Paenibacillus barengoltzii and its application in xylooligosaccharides production from corncobs. Food Chem 2018; 264:310-318. [DOI: 10.1016/j.foodchem.2018.05.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/17/2018] [Accepted: 05/02/2018] [Indexed: 10/16/2022]
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Aftab MN, Zafar A, Iqbal I, Kaleem A, Zia KM, Awan AR. Optimization of saccharification potential of recombinant xylanase from Bacillus licheniformis. Bioengineered 2018; 9:159-165. [PMID: 28886289 PMCID: PMC5972937 DOI: 10.1080/21655979.2017.1373918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Saccharification potential of xylanase enzyme cloned from Bacillus licheniformis into E. coli BL21 (DE3) was evaluated against plant biomass for the production of bioethanol. The expression of cloned gene was studied and conditions were optimized for its large scale production. The parameters effecting enzyme production were examined in a fermenter. Recombinant xylanase has the ability to breakdown birchwood xylan to release xylose as well as the potential to treat plant biomass, such as wheat straw, rice straw, and sugarcane bagass. The saccharification ability of this enzyme was optimized by studying various parameters. The maximum saccharification percentage (84%) was achieved when 20 units of recombinant xylanase were used with 8% sugarcane bagass at 50°C and 120 rpm after 6 hours of incubation. The results indicated that the bioconversion of natural biomass by recombinant xylanase into simple sugars can be used for biofuel (bioethanol) production. This process can replace the use of fossil fuels, and the use of bioethanol can significantly reduce the emission of toxic gases. Future directions regarding pre-treatment of cellulosic and hemicellulosic biomass and other processes that can reduce the cost and enhance the yield of biofuels are briefly discussed.
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Affiliation(s)
- Muhammad N Aftab
- a Institute of Industrial Biotechnology , Government College University , Katchery Road, Lahore , Pakistan
| | - Asma Zafar
- a Institute of Industrial Biotechnology , Government College University , Katchery Road, Lahore , Pakistan
| | - Irfana Iqbal
- b Department of Zoology , Lahore College for Women University , Lahore , Pakistan
| | - Afshan Kaleem
- c Department of Biotechnology , Lahore College for Women University , Lahore , Pakistan
| | - Khalid M Zia
- d Institute of Chemistry , Government College University , Faisalabad , Pakistan
| | - Ali R Awan
- e Institute of Biochemistry & Biotechnology , University of Veterinary and Animal Sciences , Lahore , Pakistan
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Liu MQ, Huo WK, Xu X, Weng XY. Recombinant Bacillus amyloliquefaciens xylanase A expressed in Pichia pastoris and generation of xylooligosaccharides from xylans and wheat bran. Int J Biol Macromol 2017; 105:656-663. [DOI: 10.1016/j.ijbiomac.2017.07.073] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 07/08/2017] [Accepted: 07/12/2017] [Indexed: 10/19/2022]
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Mano MCR, Neri-Numa IA, da Silva JB, Paulino BN, Pessoa MG, Pastore GM. Oligosaccharide biotechnology: an approach of prebiotic revolution on the industry. Appl Microbiol Biotechnol 2017; 102:17-37. [DOI: 10.1007/s00253-017-8564-2] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/19/2017] [Accepted: 09/28/2017] [Indexed: 12/25/2022]
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Boucherba N, Gagaoua M, Bouanane-Darenfed A, Bouiche C, Bouacem K, Kerbous MY, Maafa Y, Benallaoua S. Biochemical properties of a new thermo- and solvent-stable xylanase recovered using three phase partitioning from the extract of Bacillus oceanisediminis strain SJ3. BIORESOUR BIOPROCESS 2017; 4:29. [PMID: 28736694 PMCID: PMC5498614 DOI: 10.1186/s40643-017-0161-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/01/2017] [Indexed: 11/29/2022] Open
Abstract
The present study investigates the production and partial biochemical characterization of an extracellular thermostable xylanase from the Bacillus oceanisediminis strain SJ3 newly recovered from Algerian soil using three phase partitioning (TPP). The maximum xylanase activity recorded after 2 days of incubation at 37 °C was 20.24 U/ml in the presence of oat spelt xylan. The results indicated that the enzyme recovered in the middle phase of TPP system using the optimum parameters were determined as 50% ammonium sulfate saturation with 1.0:1.5 ratio of crude extract: t-butanol at pH and temperature of 8.0 and 10 °C, respectively. The xylanase was recovered with 3.48 purification fold and 107% activity recovery. The enzyme was optimally active at pH 7.0 and was stable over a broad pH range of 5.0–10. The optimum temperature for xylanase activity was 55 °C and the half-life time at this temperature was of 6 h. At this time point the enzyme retained 50% of its activity after incubation for 2 h at 95 °C. The crude enzyme resist to sodium dodecyl sulfate and β-mercaptoethanol, while all the tested ions do not affect the activity of the enzyme. The recovered enzyme is, at least, stable in tested organic solvents except in propanol where a reduction of 46.5% was observed. Further, the stability of the xylanase was higher in hydrophobic solvents where a maximum stability was observed with cyclohexane. These properties make this enzyme to be highly thermostable and may be suggested as a potential candidate for application in some industrial processes. To the best of our knowledge, this is the first report of xylanase activity and recoverey using three phase partitioning from B. oceanisediminis.
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Affiliation(s)
- Nawel Boucherba
- Laboratory of Applied Microbiology, Faculty of Nature Science and Life, University of Bejaia, 06000 Bejaia, Algeria
| | - Mohammed Gagaoua
- INATAA, Université des Frères Mentouri Constantine 1, Route de Ain El-Bey, 25000 Constantine, Algeria.,UMR1213 Herbivores, INRA, VetAgro Sup, Clermont Université, Université de Lyon, 63122 Saint-Genès-Champanelle, France
| | - Amel Bouanane-Darenfed
- Laboratory of Cellular and Molecular Biology, Microbiology Team, Faculty of Biological Sciences, University of Sciences, Technology of Houari Boumediene (USTHB), PO Box 32, El Alia, Bab Ezzouar, 16111 Algiers, Algeria
| | - Cilia Bouiche
- Laboratory of Applied Microbiology, Faculty of Nature Science and Life, University of Bejaia, 06000 Bejaia, Algeria
| | - Khelifa Bouacem
- Laboratory of Cellular and Molecular Biology, Microbiology Team, Faculty of Biological Sciences, University of Sciences, Technology of Houari Boumediene (USTHB), PO Box 32, El Alia, Bab Ezzouar, 16111 Algiers, Algeria
| | - Mohamed Yacine Kerbous
- Laboratory of Applied Microbiology, Faculty of Nature Science and Life, University of Bejaia, 06000 Bejaia, Algeria
| | - Yacine Maafa
- Laboratory of Applied Microbiology, Faculty of Nature Science and Life, University of Bejaia, 06000 Bejaia, Algeria
| | - Said Benallaoua
- Laboratory of Applied Microbiology, Faculty of Nature Science and Life, University of Bejaia, 06000 Bejaia, Algeria
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