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Wang Y, Wang C, Chen Y, Cui M, Wang Q, Guo P. Heterologous Expression of a Thermostable α-Galactosidase from Parageobacillus thermoglucosidasius Isolated from the Lignocellulolytic Microbial Consortium TMC7. J Microbiol Biotechnol 2022; 32:749-760. [PMID: 35637170 PMCID: PMC9628905 DOI: 10.4014/jmb.2201.01022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 05/05/2022] [Accepted: 05/10/2022] [Indexed: 12/15/2022]
Abstract
α-Galactosidase is a debranching enzyme widely used in the food, feed, paper, and pharmaceuticals industries and plays an important role in hemicellulose degradation. Here, T26, an aerobic bacterial strain with thermostable α-galactosidase activity, was isolated from laboratory-preserved lignocellulolytic microbial consortium TMC7, and identified as Parageobacillus thermoglucosidasius. The α-galactosidase, called T26GAL and derived from the T26 culture supernatant, exhibited a maximum enzyme activity of 0.4976 IU/ml when cultured at 60°C and 180 rpm for 2 days. Bioinformatics analysis revealed that the α-galactosidase T26GAL belongs to the GH36 family. Subsequently, the pET-26 vector was used for the heterologous expression of the T26 α-galactosidase gene in Escherichia coli BL21 (DE3). The optimum pH for α-galactosidase T26GAL was determined to be 8.0, while the optimum temperature was 60°C. In addition, T26GAL demonstrated a remarkable thermostability with more than 93% enzyme activity, even at a high temperature of 90°C. Furthermore, Ca2+ and Mg2+ promoted the activity of T26GAL while Zn2+ and Cu2+ inhibited it. The substrate specificity studies revealed that T26GAL efficiently degraded raffinose, stachyose, and guar gum, but not locust bean gum. This study thus facilitated the discovery of an effective heat-resistant α-galactosidase with potent industrial application. Meanwhile, as part of our research on lignocellulose degradation by a microbial consortium, the present work provides an important basis for encouraging further investigation into this enzyme complex.
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Affiliation(s)
- Yi Wang
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
| | - Chen Wang
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
- College of Biology and Pharmacy, Three Gorges University, Yichang 443002, P.R. China
| | - Yonglun Chen
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
- College of Biology and Pharmacy, Three Gorges University, Yichang 443002, P.R. China
| | - MingYu Cui
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
- College of Biology and Pharmacy, Three Gorges University, Yichang 443002, P.R. China
| | - Qiong Wang
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
| | - Peng Guo
- Institute of Agricultural Products Processing and Nuclear Agriculture Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, P.R. China
- College of Biology and Pharmacy, Three Gorges University, Yichang 443002, P.R. China
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Improvisation of diffusion coefficient in surface modified magnetite nanoparticles: A novel perspective. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109832. [DOI: 10.1016/j.msec.2019.109832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/16/2019] [Accepted: 05/29/2019] [Indexed: 12/11/2022]
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Katrolia P, Liu X, Li J, Kopparapu NK. Enhanced elimination of non-digestible oligosaccharides from soy milk by immobilized α-galactosidase: A comparative analysis. J Food Biochem 2019; 43:e13005. [PMID: 31393013 DOI: 10.1111/jfbc.13005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/16/2019] [Accepted: 07/17/2019] [Indexed: 12/14/2022]
Abstract
This study compared two immobilization matrices like calcium-alginate and chitosan for immobilization of α-galactosidase and evaluated their potential for the removal of non-digestible raffinose family oligosaccharides from soy milk which cause abdominal discomfort. The pH optima of the free and immobilized enzymes were found to be similar at pH 4.0. The chitosan-immobilized α-galactosidase displayed higher optimal temperature (60°C) compared to alginate-immobilized enzyme (45°C) and free enzyme (50°C). The chitosan-immobilized and alginate-immobilized α-galactosidases displayed 93.7% and 97.6% hydrolysis of raffinose family oligosaccharides, respectively, while the free enzyme hydrolyzed only 30.3% oligosaccharides present in soy milk in 4 hr. Remarkably, both the immobilized enzymes showed complete removal of raffinose family oligosaccharides in 8 hr. Moreover, reusability studies indicate that even after five cycles of reuse, the chitosan and alginate-immobilized enzymes displayed 99% and 60% hydrolysis, respectively. PRACTICAL APPLICATIONS: In this study, we have used two inexpensive and non-toxic matrices for immobilizing α-galactosidase. We report that entrapment of α-galactosidase with chitosan significantly improved the optimal temperature of α-galactosidase, which is advantageous in food industry. The hydrolysis of raffinose family oligosaccharides in soy milk was also greatly enhanced after immobilization with chitosan and alginate. Thus, the results described in this study have relevance for development of safe, cost-effective and efficient method for removal of non-digestible soy oligosaccharides in food industry.
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Affiliation(s)
- Priti Katrolia
- Heilongjiang Provincial Key University Laboratory of Processing Agricultural Products, College of Food and Bioengineering, Qiqihar University, Qiqihar, China.,College of Food Science, Southwest University, Chongqing, China
| | - Xiaolan Liu
- Heilongjiang Provincial Key University Laboratory of Processing Agricultural Products, College of Food and Bioengineering, Qiqihar University, Qiqihar, China
| | - Junzhong Li
- Heilongjiang Provincial Key University Laboratory of Processing Agricultural Products, College of Food and Bioengineering, Qiqihar University, Qiqihar, China
| | - Narasimha Kumar Kopparapu
- Heilongjiang Provincial Key University Laboratory of Processing Agricultural Products, College of Food and Bioengineering, Qiqihar University, Qiqihar, China.,College of Food Science, Southwest University, Chongqing, China
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Abdel-Mageed HM, Radwan RA, AbuelEzz NZ, Nasser HA, El Shamy AA, Abdelnaby RM, EL Gohary NA. Bioconjugation as a smart immobilization approach for α-amylase enzyme using stimuli-responsive Eudragit-L100 polymer: a robust biocatalyst for applications in pharmaceutical industry. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:2361-2368. [DOI: 10.1080/21691401.2019.1626414] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Heidi Mohamed Abdel-Mageed
- Molecular Biology Department, Genetic Engineering and Biotechnology Division, National Research Centre, Cairo, Egypt
- Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt
| | - Rasha Ali Radwan
- Biochemistry and Biotechnology Department, Faculty of Pharmacy and Drug Technology, Heliopolis University, Cairo, Egypt
| | - Nermeen Zakaria AbuelEzz
- Biochemistry Department, College of Pharmaceutical Sciences & Drug Manufacturing, Misr University for Science and Technology, Cairo, Egypt
| | - Hebatallah Ahmed Nasser
- Microbiology and Public Health Department, Faculty of Pharmacy and Drug Technology, Heliopolis University, Egypt
| | - Aliaa Ali El Shamy
- Microbiology and Public Health Department, Faculty of Pharmacy and Drug Technology, Heliopolis University, Egypt
| | - Rana M. Abdelnaby
- Pharmaceutical Chemistry Department, Faculty of Pharmacy and Drug Technology, Heliopolis University, Egypt
| | - Nesrine Abdelrehim EL Gohary
- Pharmaceutical Chemistry Department, Faculty of Pharmacy and Biotechnology, German University in Cairo, Cairo, Egypt
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Geng X, Fan J, Xu L, Wang H, Ng TB. Hydrolysis of oligosaccharides by a fungal α-galactosidase from fruiting bodies of a wild mushroom Leucopaxillus tricolor. J Basic Microbiol 2018; 58:1043-1052. [DOI: 10.1002/jobm.201800215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 07/23/2018] [Accepted: 08/05/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Xueran Geng
- College of Food Science and Engineering; Shanxi Agricultural University; Taigu Shanxi China
- State Key Laboratory for Agrobiotechnology and Department of Microbiology; China Agricultural University; Beijing China
| | - Jing Fan
- Hebei Foreing Studies University; Shijiazhuang Hebei China
| | - Lijing Xu
- College of Food Science and Engineering; Shanxi Agricultural University; Taigu Shanxi China
| | - Hexiang Wang
- State Key Laboratory for Agrobiotechnology and Department of Microbiology; China Agricultural University; Beijing China
| | - Tzi Bun Ng
- Faculty of Medicine; School of Biomedical Sciences; The Chinese University of Hong Kong; Shatin, New Territories Hong Kong China
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Shakya AK, Nandakumar KS. An update on smart biocatalysts for industrial and biomedical applications. J R Soc Interface 2018; 15:20180062. [PMID: 29491182 PMCID: PMC5832743 DOI: 10.1098/rsif.2018.0062] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 02/08/2018] [Indexed: 12/22/2022] Open
Abstract
Recently, smart biocatalysts, where enzymes are conjugated to stimuli-responsive (smart) polymers, have gained significant attention. Based on the presence or absence of external stimuli, the polymer attached to the enzyme changes its conformation to protect the enzyme from the external environment and regulate the enzyme activity, thus acting as a molecular switch. Owing to this behaviour, smart biocatalysts can be separated easily from a reaction mixture and re-used several times. Several such smart polymer-based biocatalysts have been developed for industrial and biomedical applications. In addition, they have been used in biosensors, biometrics and nano-electronic devices. This review article covers recent advances in developing different kinds of stimuli-responsive enzyme bioconjugates, including conjugation strategies, and their applications.
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Affiliation(s)
| | - Kutty Selva Nandakumar
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, People's Republic of China
- Department of Medical Biophysics and Biochemistry, Karolinska Institute, Stockholm, Sweden
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Geng X, Tian G, Zhao Y, Zhao L, Wang H, Ng TB. A Fungal α-Galactosidase from Tricholoma matsutake with Broad Substrate Specificity and Good Hydrolytic Activity on Raffinose Family Oligosaccharides. Molecules 2015; 20:13550-62. [PMID: 26213909 PMCID: PMC6332393 DOI: 10.3390/molecules200813550] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 07/17/2015] [Accepted: 07/17/2015] [Indexed: 11/16/2022] Open
Abstract
An acidic α-galactosidase designated as TMG was purified from the fruiting bodies The purification protocol entailed ion exchange chromatography on Q-Sepharose and of Tricholoma matsutake with 136-fold purification and a specific activity of 909 units/mg. Mono-Q and fast protein liquid chromatography on Superdex 75. TMG is a monomeric protein exhibiting a molecular mass of 47 kDa in SDS-PAGE and gel filtration. The purified enzyme was identified by LC-MS/MS and three inner amino acid sequences were obtained. The optimum pH and temperature for TMG with pNPGal as substrate were pH 4.5 and 55 °C, respectively. The α-galactosidase activity was strongly inhibited by K+, Ca2+, Cd2+, Hg2+, Ag+ and Zn2+ ions. The enzyme activity was inhibited by the chemical modification agent N-bromosuccinimide (NBS), indicating the importance of tryptophan residue(s) at or near the active site. Besides hydrolyzing pNPGal, TMG also efficaciously catalyzed the degradation of natural substrates such as stachyose, raffinose, and melibiose. Thus TMG can be exploited commercially for improving the nutritional value of soy milk by degradation of indigestible oligosaccharides.
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Affiliation(s)
- Xueran Geng
- State Key Laboratory for Agrobiotechnology, Department of Microbiology, China Agricultural University, Beijing 100193, China.
| | - Guoting Tian
- Institute of Biotechnology and Germplasmic Resource, Yunnan Academy of Agricultural Science, Kunming 650223, China.
| | - Yongchang Zhao
- Institute of Biotechnology and Germplasmic Resource, Yunnan Academy of Agricultural Science, Kunming 650223, China.
| | - Liyan Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Weigang, Nanjing 210095, China.
| | - Hexiang Wang
- State Key Laboratory for Agrobiotechnology, Department of Microbiology, China Agricultural University, Beijing 100193, China.
| | - Tzi Bun Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
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