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Jeilu O, Alexandersson E, Johansson E, Simachew A, Gessesse A. A novel GH3-β-glucosidase from soda lake metagenomic libraries with desirable properties for biomass degradation. Sci Rep 2024; 14:10012. [PMID: 38693138 PMCID: PMC11063200 DOI: 10.1038/s41598-024-60645-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/25/2024] [Indexed: 05/03/2024] Open
Abstract
Beta-glucosidases catalyze the hydrolysis of the glycosidic bonds of cellobiose, producing glucose, which is a rate-limiting step in cellulose biomass degradation. In industrial processes, β-glucosidases that are tolerant to glucose and stable under harsh industrial reaction conditions are required for efficient cellulose hydrolysis. In this study, we report the molecular cloning, Escherichia coli expression, and functional characterization of a β-glucosidase from the gene, CelGH3_f17, identified from metagenomics libraries of an Ethiopian soda lake. The CelGH3_f17 gene sequence contains a glycoside hydrolase family 3 catalytic domain (GH3). The heterologous expressed and purified enzyme exhibited optimal activity at 50 °C and pH 8.5. In addition, supplementation of 1 M salt and 300 mM glucose enhanced the β-glucosidase activity. Most of the metal ions and organic solvents tested did not affect the β-glucosidase activity. However, Cu2+ and Mn2+ ions, Mercaptoethanol and Triton X-100 reduce the activity of the enzyme. The studied β-glucosidase enzyme has multiple industrially desirable properties including thermostability, and alkaline, salt, and glucose tolerance.
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Affiliation(s)
- Oliyad Jeilu
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Box 190, 23422, Lomma, Sweden.
- Department of Civil and Environmental Engineering, Northwestern University, Evanston, IL, 60208, USA.
- Institute of Biotechnology, Addis Ababa University, P O Box 1176, Addis Ababa, Ethiopia.
| | - Erik Alexandersson
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Box 190, 23422, Lomma, Sweden
| | - Eva Johansson
- Department of Plant Breeding, Swedish University of Agricultural Sciences, Box 190, 23422, Lomma, Sweden
| | - Addis Simachew
- Institute of Biotechnology, Addis Ababa University, P O Box 1176, Addis Ababa, Ethiopia
| | - Amare Gessesse
- Institute of Biotechnology, Addis Ababa University, P O Box 1176, Addis Ababa, Ethiopia
- Department of Biological Sciences and Biotechnology, Botswana International University of Science and Technology, Private Bag 16, Palapye, Botswana
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2
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Zhao Y, Zhang B, Gu H, Xu T, Chen Q, Li J, Zhou P, Guan X, He L, Liang Y, Zhang K, Liu S, Shi K. A mutant GH3 family β-glucosidase from Oenococcus oeni exhibits superior adaptation to wine stresses and potential for improving wine aroma and phenolic profiles. Food Microbiol 2024; 119:104458. [PMID: 38225057 DOI: 10.1016/j.fm.2023.104458] [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: 09/30/2023] [Revised: 12/22/2023] [Accepted: 12/22/2023] [Indexed: 01/17/2024]
Abstract
In this study, we conducted a comprehensive investigation into a GH3 family β-glucosidase (BGL) from the wild-type strain of Oenococcus oeni and its mutated counterpart from the acid-tolerant mutant strain. Our analysis revealed the mutant BGL's remarkable capacity to adapt to wine-related stress conditions, including heightened tolerance to low pH, elevated ethanol concentrations, and metal ions. Additionally, the mutant BGL exhibited superior hydrolytic activity towards various substrates. Through de novo modeling, we identified specific amino acid mutations responsible for its resilience to low pH and high ethanol environments. In simulated wine conditions, the mutant BGL outperformed both wild-type and commercial BGLs, efficiently releasing terpene and phenolic aglycones from glycosides in wine grapes. These findings not only expand our understanding of O. oeni BGLs but also highlight their potential in enhancing wine production. The mutant BGL's enhanced adaptation to wine stress conditions opens promising avenue for improving wine quality and flavor.
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Affiliation(s)
- Yuzhu Zhao
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Biying Zhang
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Huawei Gu
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Tongxin Xu
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Qiling Chen
- College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Jin Li
- COFCO GreatWall Wine, Penglai, Shandong, China
| | | | - Xueqiang Guan
- Shandong Academy of Grape / Shandong Technology Innovation Center of Wine Grape and Wine, Jinan, Shandong, China
| | - Ling He
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Yanying Liang
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Kekun Zhang
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China
| | - Shuwen Liu
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China.
| | - Kan Shi
- College of Enology, College of Life Sciences, College of Horticulture, Shaanxi Engineering Research Center for Viti-Viniculture, Viti-viniculture Engineering Technology Center of State Forestry and Grassland Administration, Heyang Experimental and Demonstrational Stations for Grape, Ningxia Helan Mountain's East Foothill Wine Experiment and Demonstration Station, Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi, China.
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3
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Yang W, Su Y, Wang R, Zhang H, Jing H, Meng J, Zhang G, Huang L, Guo L, Wang J, Gao W. Microbial production and applications of β-glucosidase-A review. Int J Biol Macromol 2024; 256:127915. [PMID: 37939774 DOI: 10.1016/j.ijbiomac.2023.127915] [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: 07/21/2023] [Revised: 10/03/2023] [Accepted: 11/04/2023] [Indexed: 11/10/2023]
Abstract
β-Glucosidase exists in all areas of living organisms, and microbial β-glucosidase has become the main source of its production because of its unique physicochemical properties and the advantages of high-yield production by fermentation. With the rise of the green circular economy, the production of enzymes through the fermentation of waste as the substrate has become a popular trend. Lignocellulosic biomass is an easily accessible and sustainable feedstock that exists in nature, and the production of biofuels from lignocellulosic biomass requires the involvement of β-glucosidase. This review proposes ways to improve β-glucosidase yield and catalytic efficiency. Optimization of growth conditions and purification strategies of enzymes can increase enzyme yield, and enzyme immobilization, genetic engineering, protein engineering, and whole-cell catalysis provide solutions to enhance the catalytic efficiency and activity of β-glucosidase. Besides, the diversified industrial applications, challenges and prospects of β-glucosidase are also described.
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Affiliation(s)
- Wenqi Yang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Yaowu Su
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Rubing Wang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Huanyu Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Hongyan Jing
- Traditional Chinese Medicine College, Tianjin University of Traditional Chinese Medicine, Tianjin 301617, China
| | - Jie Meng
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Guoqi Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Luqi Huang
- National Resource Center for Chinese Meteria Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China
| | - Lanping Guo
- National Resource Center for Chinese Meteria Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China; State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs.
| | - Juan Wang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China.
| | - Wenyuan Gao
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China.
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Kim JY, Song HJ, Cheon S, An S, Lee CS, Kim SH. Comparison of three different lactic acid bacteria-fermented proteins on RAW 264.7 osteoclast and MC3T3-E1 osteoblast differentiation. Sci Rep 2023; 13:21575. [PMID: 38062113 PMCID: PMC10703878 DOI: 10.1038/s41598-023-49024-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 12/03/2023] [Indexed: 12/18/2023] Open
Abstract
Osteoporosis is a state of bone weakening caused by an imbalance in osteoblast and osteoclast activity. In this study, the anti-osteoporotic effects of three proteins fermented by lactic acid bacteria (LAB) were assessed. Commercial proteins sodium caseinate (SC), whey protein isolate (WPI), and soy protein isolate (SPI) were fermented by LAB strains for 48 h. The fermented products (F-SC, F-WPI, and F-SPI, respectively) were used in an in vitro osteoclast and osteoblast-like cell model to assess their effects on bone health. Despite no difference in the results of TRAP staining of RANKL-induced osteoclastogenesis, F-WPI and F-SPI were effective in normalizing the altered gene expression of osteoclastogenesis markers such as TRAP, Nfatc1, RANK, and ATP6v0d. F-SPI was also effective in modulating osteoblasts by enhancing the expression of the osteoblastogenesis markers T1Col, Col2a, and OSX to levels higher than those in the SPI group, indicating that protein characteristics could be enhanced through bacterial fermentation. Moreover, these boosted effects of F-SPI may be involved with isoflavone-related metabolism during LAB-fermentation of SPI. These results demonstrate the potential of LAB-fermented proteins as dietary supplements to prevent bone loss. However, further understanding of its effects on balancing osteoblasts and osteoclasts and the underlying mechanisms is needed.
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Affiliation(s)
- Jae-Young Kim
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- Institute of Life Science and Natural Resources, Korea University, Seoul, 02841, Republic of Korea
| | - Hyun Ji Song
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Sejin Cheon
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Seokyoung An
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Chul Sang Lee
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
- Institute of Life Science and Natural Resources, Korea University, Seoul, 02841, Republic of Korea
| | - Sae Hun Kim
- College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
- Institute of Life Science and Natural Resources, Korea University, Seoul, 02841, Republic of Korea.
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5
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Liu S, Zhang M, Hong D, Fang Z, Xiao Y, Fang W, Zhang X. Improving the cellobiose hydrolysis activity of glucose-stimulating β-glucosidase Bgl2A. Enzyme Microb Technol 2023; 169:110289. [PMID: 37473697 DOI: 10.1016/j.enzmictec.2023.110289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 06/05/2023] [Accepted: 07/11/2023] [Indexed: 07/22/2023]
Abstract
β-Glucosidases with high catalytic activity and glucose tolerant properties possess promising applications in lignocellulose-based industries. To obtain enzymes possessing these properties, a semi-rational strategy was employed to engineer the glucose-stimulating β-glucosidase Bgl2A for high cellobiose hydrolysis activity. A total of 18 mutants were constructed. A22S, V224D, and A22S/V224D exhibited high specific activities of 272.06, 237.60, and 239.29 U/mg toward cellobiose, which were 2.5- to 2.8-fold of Bgl2A. A22S, V224D, and A22S/V224D exhibited increased kcat values, which were 2.7- to 3.1-fold of Bgl2A. A22S and V224D maintained glucose-stimulating property, whereas A22S/V224D lost it. Using 150 g/L cellobiose as the substrate, the amount of glucose produced by A22S was the highest, yielding 129.70 g/L glucose after 3 h reaction at 35 °C. The synergistic effects of the engineered enzymes with commercial cellulase on hydrolyzing cellulose were investigated. Supplemented with the commercial cellulase and A22S, the highest glucose amount of 23.30 g/L was yielded from cellulose with hydrolysis rate of 21.02 %. Given its high cellobiose hydrolysis activity and glucose-stimulating properties, A22S can be used as a component of enzyme cocktail to match mesophilic cellulases for efficient cellulose hydrolysis.
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Affiliation(s)
- Shuaifeng Liu
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China
| | - Meng Zhang
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China
| | - Dengwang Hong
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China
| | - Zemin Fang
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China
| | - Yazhong Xiao
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China
| | - Wei Fang
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China.
| | - Xuecheng Zhang
- School of Life Sciences, Anhui University; Hefei, Anhui 230601, China; Anhui Key Laboratory of Modern Biomanufacturing; Hefei, Anhui 230601, China; Anhui Provincial Engineering Technology Research Center of Microorganisms and Biocatalysis; Hefei, Anhui 230601, China.
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6
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Sun N, Liu X, Zhang B, Wang X, Na W, Tan Z, Li X, Guan Q. Characterization of a novel recombinant halophilic β-glucosidase of Trichoderma harzianum derived from Hainan mangrove. BMC Microbiol 2022; 22:185. [PMID: 35902815 PMCID: PMC9331182 DOI: 10.1186/s12866-022-02596-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 07/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND β-glucosidase is an important biomass-degrading enzyme and plays a vital role in generating renewable biofuels through enzymatic saccharification. In this study, we analyzed the transcriptome of Trichoderma harzianum HTASA derived from Hainan mangrove and identified a new gene encoding β-glucosidase Bgl3HB. And the biochemically characterization of β-glucosidase activity was performed. RESULTS Bgl3HB showed substantial catalytic activity in the pH range of 3.0-5.0 and at temperatures of 40 ℃-60 ℃. The enzyme was found quite stable at 50 ℃ with a loss of only 33.4% relative activity after 240 min of heat exposure. In addition, all tested metal ions were found to promote the enzyme activity. The β-glucosidase activity of Bgl3HB was enhanced by 2.12-fold of its original activity in the presence of 5 M NaCl. Surprisingly, Bgl3HB also showed a remarkable ability to hydrolyze laminarin compared to other measured substrates. Enzyme efficiency was examined in the sugarcane bagasse saccharification processes, in which Bgl3HB with 5 M NaCl worked better supplementing Celluclast 1.5L than the commercial Novozyme 188 ascertained it as an admirably suited biocatalyst for the utilization of agricultural waste. In this work, this is the first report of a halophilic β-glucosidase from Trichoderma harzianum, and represents the β-glucosidase with the highest known NaCl activation concentration. And adding 5 M NaCl could enhance saccharification performance even better than commercial cellulase. CONCLUSIONS These results show that Bgl3HB has great promise as a highly stable and highly efficient cellulase with important future applications in the industrial production of biofuels.
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Affiliation(s)
- Nan Sun
- Lab of Animal Nutrition, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Xiaoxuan Liu
- Lab of Animal Nutrition, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Bingxi Zhang
- Lab of Animal Nutrition, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Xuemei Wang
- Lab of Animal Nutrition, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China.
| | - Wei Na
- Lab of Animal Genetics, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Zhen Tan
- Lab of Animal Genetics, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Xiaochun Li
- Lab of Animal Genetics, Reproduction & Breeding, College of Animal Science and Technology, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
| | - Qingfeng Guan
- Lab of Microorganism Resource and Utilization Research, School of Life Sciences, Hainan University, No.58 Renmin Avenue, Meilan, Haikou, 570228, P. R. China
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He Y, Wang C, Jiao R, Ni Q, Wang Y, Gao Q, Zhang Y, Xu G. Biochemical characterization of a novel glucose-tolerant GH3 β-glucosidase (Bgl1973) from Leifsonia sp. ZF2019. Appl Microbiol Biotechnol 2022; 106:5063-5079. [PMID: 35833950 DOI: 10.1007/s00253-022-12064-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/27/2022] [Accepted: 07/02/2022] [Indexed: 11/25/2022]
Abstract
Beta-glucosidase (Bgl) is an enzyme with considerable food, beverage, and biofuel processing potential. However, as many Bgls are inhibited by their reaction end product glucose, their industrial applications are greatly limited. In this study, a novel Bgl gene (Bgl1973) was cloned from Leifsonia sp. ZF2019 and heterologously expressed in E. coli. Sequence analysis and structure modeling revealed that Bgl1973 was 748 aa, giving it a molecular weight of 78 kDa, and it showed high similarity with the glycoside hydrolase 3 (GH3) family Bgls with which its active site residues were conserved. By using pNPGlc (p-nitrophenyl-β-D-glucopyranoside) as substrate, the optimum temperature and pH of Bgl1973 were shown to be 50 °C and 7.0, respectively. Bgl1973 was insensitive to most metal ions (12.5 mM), 1% urea, and even 0.1% Tween-80. This enzyme maintained 60% of its original activity in the presence of 20% NaCl, demonstrating its excellent salt tolerance. Furthermore, it still had 83% residual activity in 1 M of glucose, displaying its outstanding glucose tolerance. The Km, Vmax, and kcat of Bgl1973 were 0.22 mM, 44.44 μmol/min mg, and 57.78 s-1, respectively. Bgl1973 had a high specific activity for pNPGlc (19.10 ± 0.59 U/mg) and salicin (20.43 ± 0.92 U/mg). Furthermore, molecular docking indicated that the glucose binding location and the narrow and deep active channel geometry might contribute to the glucose tolerance of Bgl1973. Our results lay a foundation for the studying of this glucose-tolerant β-glucosidase and its applications in many industrial settings. KEY POINTS: • A novel β-glucosidase from GH3 was obtained from Leifsonia sp. ZF2019. • Bgl1973 demonstrated excellent glucose tolerance. • The glucose tolerance of Bgl1973 was explained using molecular docking analysis.
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Affiliation(s)
- Yi He
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Chenxi Wang
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Ronghu Jiao
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Qinxue Ni
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Yan Wang
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Qianxin Gao
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Youzuo Zhang
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China
| | - Guangzhi Xu
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, College of Food and Health, Zhejiang A&F University, Lin'an, Hangzhou, 311300, China.
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8
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Wei B, Wang YK, Yu JB, Wang SJ, Yu YL, Xu XW, Wang H. Discovery of novel glycoside hydrolases from C-glycoside-degrading bacteria using sequence similarity network analysis. J Microbiol 2021; 59:931-940. [PMID: 34554454 DOI: 10.1007/s12275-021-1292-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/15/2021] [Accepted: 08/04/2021] [Indexed: 11/25/2022]
Abstract
C-Glycosides are an important type of natural product with significant bioactivities, and the C-glycosidic bonds of C-glycosides can be cleaved by several intestinal bacteria, as exemplified by the human faeces-derived puerarin-degrading bacterium Dorea strain PUE. However, glycoside hydrolases in these bacteria, which may be involved in the C-glycosidic bond cleavage of C-glycosides, remain largely unknown. In this study, the genomes of the closest phylogenetic neighbours of five puerarin-degrading intestinal bacteria (including Dorea strain PUE) were retrieved, and the protein-coding genes in the genomes were subjected to sequence similarity network (SSN) analysis. Only four clusters of genes were annotated as glycoside hydrolases and observed in the genome of D. longicatena DSM 13814T (the closest phylogenetic neighbour of Dorea strain PUE); therefore, genes from D. longicatena DSM 13814T belonging to these clusters were selected to overexpress recombinant proteins (CG1, CG2, CG3, and CG4) in Escherichia coli BL21(DE3). In vitro assays indicated that CG4 efficiently cleaved the O-glycosidic bond of daidzin and showed moderate β-D-glucosidase and β-D-xylosidase activity. CG2 showed weak activity in hydrolyzing daidzin and pNP-β-D-fucopyranoside, while CG3 was identified as a highly selective and efficient α-glycosidase. Interestingly, CG3 and CG4 could be selectively inhibited by daidzein, explaining their different performance in kinetic studies. Molecular docking studies predicted the molecular determinants of CG2, CG3, and CG4 in substrate selectivity and inhibition propensity. The present study identified three novel and distinctive glycoside hydrolases, highlighting the potential of SSN in the discovery of novel enzymes from genomic data.
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Affiliation(s)
- Bin Wei
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou, 310014, P. R. China
- Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, P. R. China
| | - Ya-Kun Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jin-Biao Yu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Si-Jia Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
- Center for Human Nutrition, David Geffen School of Medicine, University of California, Los Angeles, California, 90024, USA
| | - Yan-Lei Yu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Xue-Wei Xu
- Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration & Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, P. R. China.
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
- Key Laboratory of Marine Fishery Resources Exploitment & Utilization of Zhejiang Province, Hangzhou, 310014, P. R. China.
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Mai Z, Wang L, Zeng Q. Characterization of a novel isoflavone glycoside-hydrolyzing β-glucosidase from mangrove soil metagenomic library. Biochem Biophys Res Commun 2021; 569:61-65. [PMID: 34229124 DOI: 10.1016/j.bbrc.2021.06.086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/22/2021] [Accepted: 06/25/2021] [Indexed: 11/21/2022]
Abstract
For the beneficial pharmacological properties of isoflavonoids and their related glycoconjugates, there is increasingly interest in their enzymatic conversion. In this study, a novel β-glucosidase gene isolated from metagenomic library of mangrove sediment was cloned and overexpressed in Escherichia coli BL21(DE3). The purified recombination β-glucosidase, designated as r-Bgl66, showed high catalytic activity for soy isoflavone glycosides. It converted soy isoflavone flour extract with the productivities of 0.87 mM/h for daidzein, 0.59 mM/h for genistein and 0.42 mM/h for glycitein. The kcat/Km values for daidzin, genistin and glycitin were 208.73, 222.37 and 288.07 mM-1 s-1, respectively. In addition, r-Bgl66 also exhibited the characteristic of glucose-tolerance, and the inhibition constant Ki was 471.4 mM. These properties make it a good candidate in the enzymatic hydrolysis of soy isoflavone glycosides. This study also highlights the utility of metagenomic approach in discovering novel β-glucosidase for soy isoflavone glycosides hydrolysis.
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Affiliation(s)
- Zhimao Mai
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China.
| | - Lin Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Qi Zeng
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
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