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Li C, Cao Z, Jiang H, Secundo F, Mao X. Characterization of a GH20 β- N-Acetylhexosaminidase from Flavobacterium algicola Suitable to Synthesize Lacto- N-triose II. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:4849-4857. [PMID: 38386626 DOI: 10.1021/acs.jafc.3c07919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
β-N-Acetylhexosaminidases have attracted much attention in the enzymatic synthesis of lacto-N-triose II (LNT2) as a backbone precursor of human milk oligosaccharides (HMOs). In this study, a novel glycoside hydrolase (GH) 20 family β-N-acetylhexosaminidase, FlaNag2353, from Flavobacterium algicola was biochemically characterized and applied to synthesize LNT2. FlaNag2353 displayed optimal activity to p-nitrophenyl N-acetyl-β-d-glucosaminide (pNP-GlcNAc) at 40 °C and pH 8.0. In addition to its excellent hydrolysis activity toward pNP-GlcNAc and chitooligosaccharides, FlaNag2353 showed trans-glycosylation activity. Under conditions of pH 9.0 and 55 °C for 2 h and utilizing 200 mM lactose and 10 mM pNP-GlcNAc, FlaNag2353 synthesized LNT2 with a conversion ratio of 4.15% calculated from pNP-GlcNAc. Moreover, when applied to LNT2 synthesis with 10 mM pNP-GlcNAc and 9.7% (w/v) industrial waste whey powder, FlaNag2353 achieved a conversion ratio of 2.39%. This study has significant implications for broadening the applications of GH20 β-N-acetylhexosaminidases and promoting the high-value utilization of whey powder.
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Affiliation(s)
- Chengqiang Li
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Zhuoning Cao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
| | - Hong Jiang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
- Sanya Ocean Institute, Ocean University of China, Sanya 572024, China
| | - Francesco Secundo
- Istituto di Scienze e Tecnologie Chimiche "Giulio Natta", CNR, v. Mario Bianco 9, Milan 20131, Italy
| | - Xiangzhao Mao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, PR China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, PR China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, PR China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, PR China
- Sanya Ocean Institute, Ocean University of China, Sanya 572024, China
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Liu Y, Yan Q, Ma J, Wang J, Jiang Z, Yang S. Directed evolution of a β-N-acetylhexosaminidase from Haloferula sp. for lacto-N-triose II and lacto-N-neotetraose synthesis from chitin. Enzyme Microb Technol 2023; 164:110177. [PMID: 36549095 DOI: 10.1016/j.enzmictec.2022.110177] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 12/06/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
In our previous study, a β-N-acetylhexosaminidase (HaHex74) from Haloferula sp. showing high human milk oligosaccharides (HMOs) synthesis ability was identified and characterized. In this study, HaHex74 was further engineered by directed evolution and site-saturation mutagenesis to improve its transglycosylation activity for HMOs synthesis. A mutant (mHaHex74) with improved transglycosylation activity (HaHex74-Asn401Ile/His394Leu) was obtained and characterized. mHaHex74 exhibited maximal activity at pH 5.5 and 35 °C, respectively, which were distinct from that of HaHex74 (pH 6.5 and 45 °C). Moreover, mHaHex74 showed the highest LNT2 conversion ratio of 28.2% from N,N'-diacetyl chitobiose (GlcNAc2), which is 2.2 folds higher than that of HaHex74. A three-enzyme cascade reaction for the synthesis of LNT2 and LNnT from chitin was performed in a 5-L reactor, and the contents of LNT2 and LNnT reached up to 15.0 g L1 and 4.9 g L1, respectively. Therefore, mHaHex74 maybe a good candidate for enzymatic synthesis of HMOs.
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Affiliation(s)
- Yihao Liu
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China
| | - Qiaojuan Yan
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China
| | - Junwen Ma
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China
| | - Jianyu Wang
- Key Laboratory of Food Bioengineering (China National Light Industry), College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China
| | - Zhengqiang Jiang
- Department of Nutrition and Health, College of Food Science and Nutritional Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China.
| | - Shaoqing Yang
- Department of Nutrition and Health, College of Food Science and Nutritional Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian, Beijing 100083, China.
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Characterization of chitinase from Exiguobacterium antarcticum and its bioconversion of crayfish shell into chitin oligosaccharides. Food Res Int 2022; 158:111517. [DOI: 10.1016/j.foodres.2022.111517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/31/2022] [Accepted: 06/13/2022] [Indexed: 11/22/2022]
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Liu YH, Wang L, Huang P, Jiang ZQ, Yan QJ, Yang SQ. Efficient sequential synthesis of lacto-N-triose II and lacto-N-neotetraose by a novel β-N-acetylhexosaminidase from Tyzzerella nexilis. Food Chem 2020; 332:127438. [DOI: 10.1016/j.foodchem.2020.127438] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 01/01/2023]
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Liu Y, Jiang Z, Ma J, Ma S, Yan Q, Yang S. Biochemical Characterization and Structural Analysis of a β- N-Acetylglucosaminidase from Paenibacillus barengoltzii for Efficient Production of N-Acetyl-d-glucosamine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:5648-5657. [PMID: 32338008 DOI: 10.1021/acs.jafc.9b08085] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bioproduction of N-acetyl-d-glucosamine (GlcNAc) from chitin, the second most abundant natural renewable polymer on earth, is of great value in which chitinolytic enzymes play key roles. In this study, a novel glycoside hydrolase family-18 β-N-acetylglucosaminidase (PbNag39) from Paenibacillus barengoltzii suitable for GlcNAc production was identified and biochemically characterized. It possessed a unique shallow catalytic groove (5.8 Å) as well as a smaller C-terminal domain (solvent-accessible surface area, 5.1 × 103 Å2) and exhibited strict substrate specificity toward N-acetyl chitooligosaccharides (COS) with GlcNAc as the sole product, showing a typical manner of action of β-N-acetylglucosaminidases. Thus, an environmentally friendly bioprocess for GlcNAc production from ball-milled powdery chitin by an enzyme cocktail reaction was further developed. By using the new route, the powdery chitin conversion rate increased from 23.3% (v/v) to 75.3% with a final GlcNAc content of 22.6 mg mL-1. The efficient and environmentally friendly bioprocess may have great application potential in GlcNAc production.
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Affiliation(s)
- Yihao Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Zhengqiang Jiang
- College of Food Science and Nutritional Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Junwen Ma
- College of Food Science and Nutritional Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Shuai Ma
- College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Qiaojuan Yan
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
| | - Shaoqing Yang
- College of Food Science and Nutritional Engineering, China Agricultural University, No.17 Qinghua East Road, Haidian District, Beijing 100083, China
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Enzymatic properties of β-N-acetylglucosaminidases. Appl Microbiol Biotechnol 2017; 102:93-103. [PMID: 29143882 DOI: 10.1007/s00253-017-8624-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 11/02/2017] [Accepted: 11/02/2017] [Indexed: 01/27/2023]
Abstract
β-N-Acetylglucosaminidases (GlcNAcases) hydrolyse N-acetylglucosamine-containing oligosaccharides and proteins. These enzymes produce N-acetylglucosamine (GlcNAc) and have a wide range of promising applications in the food, energy, and pharmaceutical industries, such as synergistic degradation of chitin with endo-chitinases and using GlcNAc to produce sialic acid, bioethanol, single-cell proteins, and pharmaceutical therapeutics. GlcNAcases also play an important role in the dynamic balance of cellular O-linked GlcNAc levels, catabolism of ganglioside storage in Tay-Sachs disease, and bacterial cell wall recycling and flagellar assembly. In view of these important biological functions and the wide range of industrial applications of GlcNAcases, this review aims to provide a better understanding of various advances for these enzymes. It focuses on enzymatic properties of GlcNAcases, including substrate specificity, catalytic activity, pH optimum, temperature optimum, thermostability, the effects of various metal ions and organic reagents, and transglycosylation.
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