1
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Wang Q, Wang X, Ding J, Huang L, Wang Z. Structural insight of cell surface sugars in viral infection and human milk glycans as natural antiviral substance. Int J Biol Macromol 2024; 277:133867. [PMID: 39009265 DOI: 10.1016/j.ijbiomac.2024.133867] [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: 04/03/2024] [Revised: 06/24/2024] [Accepted: 07/11/2024] [Indexed: 07/17/2024]
Abstract
Viral infections are caused by the adhesion of viruses to host cell receptors, including sialylated glycans, glycosaminoglycans, and human blood group antigens (HBGAs). Atomic-level structural information on the interactions between viral particles or proteins with glycans can be determined to provide precise targets for designing antiviral drugs. Milk glycans, existing as free oligosaccharides or glycoconjugates, have attracted increasing attention; milk glycans protect infants against infectious diseases, particularly poorly manageable viral infections. Furthermore, several glycans containing structurally distinct sialic acid/fucose/sulfate modifications in human milk acting as a "receptor decoy" and serving as the natural antiviral library, could interrupt virus-receptor interaction in the first line of defense for viral infection. This review highlights the basis of virus-glycan interactions, presents specific glycan receptor binding by gastroenterovirus viruses, including norovirus, enteroviruses, and the breakthroughs in the studies on the antiviral properties of human milk glycans, and also elucidates the role of glycans in respiratory viruses infection. In addition, recent advances in methods for performing virus/viral protein-glycan interactions were reported. Finally, we discuss the prospects and challenges of the studies on the clinical application of human milk glycan for viral interventions.
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Affiliation(s)
- Qingling Wang
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University, Xi'an 710069, China
| | - Xiaoqin Wang
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University, Xi'an 710069, China
| | - Jieqiong Ding
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University, Xi'an 710069, China
| | - Linjuan Huang
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University, Xi'an 710069, China.
| | - Zhongfu Wang
- Shaanxi Natural Carbohydrate Resource Engineering Research Center, College of Food Science and Technology, Northwest University, Xi'an 710069, China.
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2
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Huang F, Gao Q, Zhou X, Guo W, Feng K, Zhu L, Huang T, Cai YD. Prediction of Solubility of Proteins in Escherichia coli Based on Functional and Structural Features Using Machine Learning Methods. Protein J 2024:10.1007/s10930-024-10230-z. [PMID: 39243320 DOI: 10.1007/s10930-024-10230-z] [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: 08/21/2024] [Indexed: 09/09/2024]
Abstract
Protein solubility is a critical parameter that determines the stability, activity, and functionality of proteins, with broad and far-reaching implications in biotechnology and biochemistry. Accurate prediction and control of protein solubility are essential for successful protein expression and purification in research and industrial settings. This study gathered information on soluble and insoluble proteins. In characterizing the proteins, they were mapped to STRING and characterized by functional and structural features. All functional/structural features were integrated to create a 5768-dimensional binary vector to encode proteins. Seven feature-ranking algorithms were employed to analyze the functional/structural features, yielding seven feature lists. These lists were subjected to the incremental feature selection, incorporating four classification algorithms, one by one to build effective classification models and identify functional/structural features with classification-related importance. Some essential functional/structural features used to differentiate between soluble and insoluble proteins were identified, including GO:0009987 (intercellular communication) and GO:0022613 (ribonucleoprotein complex biogenesis). The best classification model using support vector machine as the classification algorithm and 295 optimized functional/structural features generated the F1 score of 0.825, which can be a powerful tool to differentiate soluble proteins from insoluble proteins.
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Affiliation(s)
- Feiming Huang
- School of Life Sciences, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Qian Gao
- Department of Pharmacy, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - XianChao Zhou
- Center for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Wei Guo
- Key Laboratory of Stem Cell Biology, Shanghai Institutes for Biological Sciences (SIBS), Shanghai Jiao Tong University School of Medicine (SJTUSM), Chinese Academy of Sciences (CAS), Shanghai, 200030, China
| | - KaiYan Feng
- Department of Computer Science, Guangdong AIB Polytechnic College, Guangzhou, 510507, China
| | - Lin Zhu
- School of Information Science, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Tao Huang
- CAS Key Laboratory of Computational Biology, Shanghai Institute of Nutrition and Health, Bio-Med Big Data Center, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, 200031, China.
| | - Yu-Dong Cai
- School of Life Sciences, Shanghai University, Shanghai, 200444, People's Republic of China.
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3
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Du Z, Li Z, Guang C, Zhu Y, Mu W. Recent advances of 3-fucosyllactose in health effects and production. Arch Microbiol 2024; 206:378. [PMID: 39143417 DOI: 10.1007/s00203-024-04104-2] [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: 06/28/2024] [Revised: 07/29/2024] [Accepted: 08/05/2024] [Indexed: 08/16/2024]
Abstract
Human milk oligosaccharides (HMOs) have been recognized as gold standard for infant development. 3-Fucosyllactose (3-FL), being one of the Generally Recognized as Safe HMOs, represents a core trisaccharide within the realm of HMOs; however, it has received comparatively less attention in contrast to extensively studied 2'-fucosyllactose. The objective of this review is to comprehensively summarize the health effects of 3-FL, including its impact on gut microbiota proliferation, antimicrobial effects, immune regulation, antiviral protection, and brain maturation. Additionally, the discussion also covers the commercial application and regulatory approval status of 3-FL. Lastly, an organized presentation of large-scale production methods for 3-FL aims to provide a comprehensive guide that highlights current strategies and challenges in optimization.
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Affiliation(s)
- Zhihui Du
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Zeyu Li
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Cuie Guang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, Jiangsu, People's Republic of China.
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4
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Erkanli ME, El-Halabi K, Kang TK, Kim JR. Hotspot Wizard-informed engineering of a hyperthermophilic β-glucosidase for enhanced enzyme activity at low temperatures. Biotechnol Bioeng 2024; 121:2079-2090. [PMID: 38682557 DOI: 10.1002/bit.28732] [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: 02/03/2024] [Revised: 04/11/2024] [Accepted: 04/19/2024] [Indexed: 05/01/2024]
Abstract
Hyperthermophilic enzymes serve as an important source of industrial enzymes due to their high thermostability. Unfortunately, most hyperthermophilic enzymes suffer from reduced activity at low temperatures (e.g., ambient temperature), limiting their applicability. In addition, evolving hyperthermophilic enzymes to increase low temperature activity without compromising other desired properties is generally difficult. In the current study, a variant of β-glucosidase from Pyrococcus furiosus (PfBGL) was engineered to enhance enzyme activity at low temperatures through the construction of a saturation mutagenesis library guided by the HotSpot Wizard analysis, followed by its screening for activity and thermostability. From this library construction and screening, one PfBGL mutant, PfBGL-A4 containing Q214S/A264S/F344I mutations, showed an over twofold increase in β-glucosidase activity at 25 and 50°C compared to the wild type, without compromising high-temperature activity, thermostability and substrate specificity. Our experimental and computational characterizations suggest that the findings with PfBGL-A4 may be due to the elevation of local conformational flexibility around the active site, while slightly compacting the global protein structure. This study showcases the potential of HotSpot Wizard-informed engineering of hyperthermophilic enzymes and underscores the interplays among temperature, enzyme activity, and conformational flexibility in these enzymes.
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Affiliation(s)
- Mehmet Emre Erkanli
- Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York, USA
| | - Khalid El-Halabi
- Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York, USA
| | - Ted Keunsil Kang
- Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York, USA
| | - Jin Ryoun Kim
- Department of Chemical and Biomolecular Engineering, New York University, Brooklyn, New York, USA
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5
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Du Z, Zhu Y, Lu Z, Chen R, Huang Z, Chen Y, Guang C, Mu W. Combinatorial Optimization Strategies for 3-Fucosyllactose Hyperproduction in Escherichia coli. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:14191-14198. [PMID: 38878091 DOI: 10.1021/acs.jafc.4c02950] [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: 06/27/2024]
Abstract
3-Fucosyllactose (3-FL), an important fucosylated human milk oligosaccharide in breast milk, offers numerous health benefits to infants. Previously, we metabolically engineered Escherichia coli BL21(DE3) for the in vivo biosynthesis of 3-FL. In this study, we initially optimized culture conditions to double 3-FL production. Competing pathway genes involved in in vivo guanosine 5'-diphosphate-fucose biosynthesis were subsequently inactivated to redirect fluxes toward 3-FL biosynthesis. Next, three promising transporters were evaluated using plasmid-based or chromosomally integrated expression to maximize extracellular 3-FL production. Additionally, through analysis of α1,3-fucosyltransferase (FutM2) structure, we identified Q126 residues as a highly mutable residue in the active site. After site-saturation mutation, the best-performing mutant, FutM2-Q126A, was obtained. Structural analysis and molecular dynamics simulations revealed that small residue replacement positively influenced helical structure generation. Finally, the best strain BD3-A produced 6.91 and 52.1 g/L of 3-FL in a shake-flask and fed-batch cultivations, respectively, highlighting its potential for large-scale industrial applications.
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Affiliation(s)
- Zhihui Du
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Zhen Lu
- Bloomage Biotechnology Corp., Ltd., Jinan, Shandong 250010, People's Republic of China
| | - Roulin Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Zhaolin Huang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yihan Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Cuie Guang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
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6
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Lee JM, Kim JH, Kim JY, Oh MK, Kim BG. Enhancing the soluble expression of α-1,2-fucosyltransferase in E. coli using high-throughput flow cytometry screening coupled with a split-GFP. J Biotechnol 2024; 387:49-57. [PMID: 38556215 DOI: 10.1016/j.jbiotec.2024.03.014] [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: 12/31/2023] [Revised: 03/14/2024] [Accepted: 03/26/2024] [Indexed: 04/02/2024]
Abstract
2'-Fucosyllactose (2'-FL), one of the major human milk oligosaccharides, was produced in several engineered microorganisms. However, the low solubility of α-1,2-fucosyltransferase (α1,2-FucT) often becomes a bottleneck to produce maximum amount of 2'-FL in the microorganisms. To overcome this solubility issue, the following studies were conducted to improve the soluble expression of α1,2-FucT. Initially, hydrophobic amino acids in the hydrophilic region of the 6 α-helices were mutated, adhering to the α-helix rule. Subsequently, gfp11 was fused to the C-terminal of futC gene encoding α1,2-FucT (FutC), enabling selection of high-fluorescence mutants through split-GFP. Each mutant library was screened via fluorescence activated cell sorting (FACS) to separate soluble mutants for high-throughput screening. As a result, L80C single mutant and A121D/P124A/L125R triple mutant were found, and a combined quadruple mutant was created. Furthermore, we combined mutations of conserved sequences (Q150H/C151R/Q239S) of FutC, which showed positive effects in the previous studies from our lab, with the above quadruple mutants (L80C/A121D/P124A/L125R). The resulting strain produced approximately 3.4-fold higher 2'-FL titer than that of the wild-type, suggesting that the conserved sequence mutations are an independent subset of the mutations that further improve the solubility of the target protein acquired by random mutagenesis using split-GFP.
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Affiliation(s)
- Jun-Min Lee
- Department of Chemical & Biological Engineering, Korea University, Seoul 136-763, South Korea
| | - Jung Hwa Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea; Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, South Korea
| | - Jin Young Kim
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, South Korea
| | - Min-Kyu Oh
- Department of Chemical & Biological Engineering, Korea University, Seoul 136-763, South Korea.
| | - Byung-Gee Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea; Institute of Molecular Biology and Genetics, Seoul National University, Seoul, South Korea; Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, South Korea; Bio-MAX/N-Bio Institute, Seoul National University, Seoul, South Korea; Institute for Sustainable Development (ISD), Seoul National University, Seoul, South Korea.
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7
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Xie Y, Wu X, Fu C, Duan H, Shi J, Blamey JM, Sun J. Rational Design of an α-1,3-Fucosyltransferase for the Biosynthesis of 3-Fucosyllactose in Bacillus subtilis ATCC 6051a via De Novo GDP-l-Fucose Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:1178-1189. [PMID: 38183288 DOI: 10.1021/acs.jafc.3c07604] [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: 01/08/2024]
Abstract
3-Fucosyllactose (3-FL) is an important oligosaccharide and nutrient in breast milk that can be synthesized in microbial cells by α-1,3-fucosyltransferase (α-1,3-FucT) using guanosine 5'-diphosphate (GDP)-l-fucose and lactose as substrates. However, the catalytic efficiency of known α-1,3-FucTs from various sources was limited due to their low solubility. To enhance the microbial production of 3-FL, the efficiencies of α-1,3-FucTs were evaluated and in Bacillus subtilis (B. subtilis) chassis cells that had been endowed with a heterologous synthetic pathway for GDP-l-fucose, revealing that the activity of FucTa from Helicobacter pylori (H. pylori) was higher than that of any of other reported homologues. To further improve the catalytic performance of FucTa, a rational design approach was employed, involving intracellular evaluation of the mutational sites of M32 obtained through directed evolution, analysis of the ligand binding site diversity, and protein structure simulation. Among the obtained variants, the FucTa-Y218 K variant exhibited the highest 3-FL yield, reaching 7.55 g/L in the shake flask growth experiment, which was 3.48-fold higher than that achieved by the wild-type enzyme. Subsequent fermentation optimization in a 5 L bioreactor resulted in a remarkable 3-FL production of 36.98 g/L, highlighting the great prospects of the designed enzyme and the strains for industrial applications.
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Affiliation(s)
- Yukang Xie
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xinying Wu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
| | - Cong Fu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haiyan Duan
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
| | - Jiping Shi
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
| | - Jenny M Blamey
- Fundación Biociencia, José Domingo Cañas, 2280 Ñuñoa, Santiago, Chile
- Facultad de Química Y Biología, Universidad de Santiago de Chile, 3363 Alameda, Estación Central, Santiago, Chile
| | - Junsong Sun
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- School of Life Science and Technology, Shanghai Tech University, Shanghai 201210, China
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8
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Wang M, Ji Q, Lai B, Liu Y, Mei K. Structure-function and engineering of plant UDP-glycosyltransferase. Comput Struct Biotechnol J 2023; 21:5358-5371. [PMID: 37965058 PMCID: PMC10641439 DOI: 10.1016/j.csbj.2023.10.046] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 11/16/2023] Open
Abstract
Natural products synthesized by plants have substantial industrial and medicinal values and are therefore attracting increasing interest in various related industries. Among the key enzyme families involved in the biosynthesis of natural products, uridine diphosphate-dependent glycosyltransferases (UGTs) play a crucial role in plants. In recent years, significant efforts have been made to elucidate the catalytic mechanisms and substrate recognition of plant UGTs and to improve them for desired functions. In this review, we presented a comprehensive overview of all currently published structures of plant UGTs, along with in-depth analyses of the corresponding catalytic and substrate recognition mechanisms. In addition, we summarized and evaluated the protein engineering strategies applied to improve the catalytic activities of plant UGTs, with a particular focus on high-throughput screening methods. The primary objective of this review is to provide readers with a comprehensive understanding of plant UGTs and to serve as a valuable reference for the latest techniques used to improve their activities.
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Affiliation(s)
- Mengya Wang
- Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Qiushuang Ji
- Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Bin Lai
- BMBF junior research group Biophotovoltaics, Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, Leipzig 04318, Germany
| | - Yirong Liu
- Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
- Key Laboratory of Systems Bioengineering, Ministry of Education, Tianjin University, Tianjin 300072, China
| | - Kunrong Mei
- Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency, 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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9
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Liang C, He J, Zhao X, Hong J, Ma X, Mao M, Nie W, Wu G, Dong Y, Xu W, Huang L, Xie HY. Monitoring the Cascade of Tumor-specific Immune Response in vivo via Chemoenzymatic Proximity Labeling. Angew Chem Int Ed Engl 2023; 62:e202304838. [PMID: 37650228 DOI: 10.1002/anie.202304838] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/25/2023] [Accepted: 08/30/2023] [Indexed: 09/01/2023]
Abstract
Monitoring the highly dynamic and complex immune response remains a great challenge owing to the lack of reliable and specific approaches. Here, we develop a strategy to monitor the cascade of tumor immune response through the cooperation of pore-forming alginate gel with chemoenzymatic proximity-labeling. A macroporous gel containing tumor-associated antigens, adjuvants, and pro-inflammatory cytokines is utilized to recruit endogenous DCs and enhance their maturation in vivo. The mature DCs are then modified with GDP-fucose-fucosyltransferase (GDP-Fuc-Fuct) via the self-catalysis of fucosyltransferase (Fuct). Following the migration of the obtained Fuct-DCs to the draining lymph nodes (dLNs), the molecular recognition mediated interaction of DCs and T cells leads to the successful decoration of T cells with GDP-Fuc-azide through the Fuct catalyzed proximity-labeling. Therefore, the activated tumor-specific T cells in dLNs and tumors can be identified through bioorthogonal labeling, opening up a new avenue for studying the immune mechanism of tumors in situ.
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Affiliation(s)
- Chao Liang
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Jiaqi He
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Xin Zhao
- School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Jie Hong
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Xianbin Ma
- School of Medical Technology, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Mingchuan Mao
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Weidong Nie
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Guanghao Wu
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Yuping Dong
- School of Material Science & Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Wei Xu
- School of Life Science, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Lili Huang
- School of Medical Technology, Beijing Institute of Technology, Beijing, 100081, P. R. China
| | - Hai-Yan Xie
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Chemical Biology Center, Peking University, Beijing, 100191, P. R. China
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10
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Paliya BS, Sharma VK, Tuohy MG, Singh HB, Koffas M, Benhida R, Tiwari BK, Kalaskar DM, Singh BN, Gupta VK. Bacterial glycobiotechnology: A biosynthetic route for the production of biopharmaceutical glycans. Biotechnol Adv 2023; 67:108180. [PMID: 37236328 DOI: 10.1016/j.biotechadv.2023.108180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/16/2023] [Accepted: 05/21/2023] [Indexed: 05/28/2023]
Abstract
The recent advancement in the human glycome and progress in the development of an inclusive network of glycosylation pathways allow the incorporation of suitable machinery for protein modification in non-natural hosts and explore novel opportunities for constructing next-generation tailored glycans and glycoconjugates. Fortunately, the emerging field of bacterial metabolic engineering has enabled the production of tailored biopolymers by harnessing living microbial factories (prokaryotes) as whole-cell biocatalysts. Microbial catalysts offer sophisticated means to develop a variety of valuable polysaccharides in bulk quantities for practical clinical applications. Glycans production through this technique is highly efficient and cost-effective, as it does not involve expensive initial materials. Metabolic glycoengineering primarily focuses on utilizing small metabolite molecules to alter biosynthetic pathways, optimization of cellular processes for glycan and glycoconjugate production, characteristic to a specific organism to produce interest tailored glycans in microbes, using preferably cheap and simple substrate. However, metabolic engineering faces one of the unique challenges, such as the need for an enzyme to catalyze desired substrate conversion when natural native substrates are already present. So, in metabolic engineering, such challenges are evaluated, and different strategies have been developed to overcome them. The generation of glycans and glycoconjugates via metabolic intermediate pathways can still be supported by glycol modeling achieved through metabolic engineering. It is evident that modern glycans engineering requires adoption of improved strain engineering strategies for creating competent glycoprotein expression platforms in bacterial hosts, in the future. These strategies include logically designing and introducing orthogonal glycosylation pathways, identifying metabolic engineering targets at the genome level, and strategically improving pathway performance (for example, through genetic modification of pathway enzymes). Here, we highlight current strategies, applications, and recent progress in metabolic engineering for producing high-value tailored glycans and their applications in biotherapeutics and diagnostics.
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Affiliation(s)
- Balwant S Paliya
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Vivek K Sharma
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India
| | - Maria G Tuohy
- Biochemistry, School of Biological and Chemical Sciences, College of Science & Engineering, University of Galway (Ollscoil na Gaillimhe), University Road, Galway City, Ireland
| | - Harikesh B Singh
- Department of Biotechnology, GLA University, Mathura 281406, Uttar Pradesh, India
| | - Mattheos Koffas
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Rachid Benhida
- Institut de Chimie de Nice, UMR7272, Université Côte d'Azur, Nice, France; Mohamed VI Polytechnic University, Lot 660, Hay Moulay Rachid 43150, Benguerir, Morocco
| | | | - Deepak M Kalaskar
- UCL Division of Surgery and Interventional Science, Royal Free Hospital Campus, University College London, Rowland Hill Street, NW3 2PF, UK
| | - Brahma N Singh
- Herbal Nanobiotechnology Lab, Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India.
| | - Vijai K Gupta
- Biorefining and Advanced Materials Research Centre, SRUC, Barony Campus, Parkgate, Dumfries DG1 3NE, United Kingdom.
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11
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Zhao M, Zhu Y, Wang H, Xu W, Zhang W, Mu W. An Overview of Sugar Nucleotide-Dependent Glycosyltransferases for Human Milk Oligosaccharide Synthesis. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:12390-12402. [PMID: 37552889 DOI: 10.1021/acs.jafc.3c02895] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Human milk oligosaccharides (HMOs) have received increasing attention because of their special effects on infant health and commercial value as the new generation of core components in infant formula. Currently, large-scale production of HMOs is generally based on microbial synthesis using metabolically engineered cell factories. Introduction of the specific glycosyltransferases is essential for the construction of HMO-producing engineered strains in which the HMO-producing glycosyltransferases are generally sugar nucleotide-dependent. Four types of glycosyltransferases have been used for typical glycosylation reactions to synthesize HMOs. Soluble expression, substrate specificity, and regioselectivity are common concerns of these glycosyltransferases in practical applications. Screening of specific glycosyltransferases is an important research topic to solve these problems. Molecular modification has also been performed to enhance the catalytic activity of various HMO-producing glycosyltransferases and to improve the substrate specificity and regioselectivity. In this article, various sugar nucleotide-dependent glycosyltransferases for HMO synthesis were overviewed, common concerns of these glycosyltransferases were described, and the future perspectives of glycosyltransferase-related studies were provided.
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Affiliation(s)
- Mingli Zhao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Hao Wang
- Bloomage Biotechnology Corp., Ltd., Jinan, Shandong 250010, People's Republic of China
| | - Wei Xu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
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12
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Meng J, Zhu Y, Wang H, Cao H, Mu W. Biosynthesis of Human Milk Oligosaccharides: Enzyme Cascade and Metabolic Engineering Approaches. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2234-2243. [PMID: 36700801 DOI: 10.1021/acs.jafc.2c08436] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Human milk oligosaccharides (HMOs) have unique beneficial effects for infants and are considered as the new gold standard for premium infant formula. They are a collection of unconjugated glycans, and more than 200 distinct structures have been identified. Generally, HMOs are enzymatically produced by elongation and/or modification from lactose via stepwise glycosylation. Each glycosylation requires a specific glycosyltransferase (GT) and the corresponding nucleotide sugar donor. In this review, the typical HMO-producing GTs and the one-pot multienzyme modules for generating various nucleotide sugar donors are introduced, the principles for designing the enzyme cascade routes for HMO synthesis are described, and the important metabolic engineering strategies for mass production of HMOs are also reviewed. In addition, the future research directions in biotechnological production of HMOs were prospected.
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Affiliation(s)
- Jiawei Meng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Hao Wang
- Bloomage Biotechnology Corporation, Limited, Jinan, Shandong 250010, People's Republic of China
| | - Hongzhi Cao
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
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13
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Sugita T, Sampei S, Koketsu K. Efficient production of lacto-N-fucopentaose III in engineered Escherichia coli using α1,3-fucosyltransferase from Parabacteroides goldsteinii. J Biotechnol 2023; 361:110-118. [PMID: 36509384 DOI: 10.1016/j.jbiotec.2022.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 11/15/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022]
Abstract
Lacto-N-fucopentaose III (LNFP III) is a human milk oligosaccharide (HMO) with potential health benefits in infants, including in immune development and modulation of the intestinal environment. Low-cost fermentative production of various HMOs from lactose by engineered Escherichia coli has attracted attention, but few reports have investigated long-chain HMO production, such as of the pentasaccharide LNFP III. LNFP III is synthesized by α1,3-fucosyltransfer reaction to the glucosamine (GlcNAc) moiety in the lacto-N-neotetraose (LNnT) skeleton by α1,3-fucosyltransferase (α1,3-FucT). However, the known α1,3-FucTs also transfer fucose to the reducing terminal glucose moiety of LNnT or the starting material lactose, resulting in various byproducts. Here, we found a useful α1,3-FucT from Parabacteroides goldsteinii (PgsFucT), which is only reactive for GlcNAc in the N-acetyllactosamine (LacNAc) skeleton in vivo. On the basis of sequence alignment with a FucT of known structure, we also generated α1,3-FucT variants with altered reactivity for LacNAc or lactose. An E. coli strain heterologously expressing PgsFucT accumulated 3.84 g/L of LNFP III after 48 h of culture in a 3-L jar-fermenter. The amounts of various byproduct sugars were remarkably decreased compared with a strain expressing the previously characterized α1,3-fucT from Bacteroides fragilis.
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Affiliation(s)
- Tomotoshi Sugita
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan.
| | - Sotaro Sampei
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan.
| | - Kento Koketsu
- Kirin Central Research Institute, Kirin Holdings Company, Limited, 2-26-1, Muraoka-Higashi, Fujisawa, Kanagawa 251-8555, Japan.
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14
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Zheng J, Xu H, Fang J, Zhang X. Enzymatic and chemoenzymatic synthesis of human milk oligosaccharides and derivatives. Carbohydr Polym 2022; 291:119564. [DOI: 10.1016/j.carbpol.2022.119564] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 04/28/2022] [Accepted: 04/29/2022] [Indexed: 01/28/2023]
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15
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Li Z, Zhu Y, Ni D, Zhang W, Mu W. Occurrence, functional properties, and preparation of 3-fucosyllactose, one of the smallest human milk oligosaccharides. Crit Rev Food Sci Nutr 2022; 63:9364-9378. [PMID: 35438024 DOI: 10.1080/10408398.2022.2064813] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Human milk oligosaccharides (HMOs) are receiving wide interest and high attention due to their health benefits, especially for newborns. The HMOs-fortified products are expected to mimic human milk not only in the kinds of added oligosaccharides components but also the appropriate proportion between these components, and further provide the nutrition and physiological effects of human milk to newborns as closely as possible. In comparison to intensively studied 2'-fucosyllactose (2'-FL), 3-fucosyllactose (3-FL) has less attention in almost all respects. Nerveless, 3-FL naturally occurs in breast milk and increases roughly over the course of lactation with a nonnegligible content, and plays an irreplaceable role in human milk and delivers functional properties to newborns. According to the safety evaluation, 3-FL shows no acute oral toxicity, genetic toxicity, and subchronic toxicity. It has been approved as generally recognized as safe (GRAS). Biological production of 3-FL can be realized by enzymatic and cell factory approaches. The α1,3- or α1,3/4-fucosyltransferase is the key enzyme for 3-FL biosynthesis. Various metabolic engineering strategies have been applied to enhance 3-FL yield using cell factory approach. In conclusion, this review gives an overview of the recent scientific literatures regarding occurrence, bioactive properties, safety evaluation, and biotechnological preparation of 3-FL.
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Affiliation(s)
- Zeyu Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Dawei Ni
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China
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16
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Heine V, Pelantová H, Bojarová P, Křen V, Elling L. Targeted fucosylation of glycans with engineered bacterial fucosyltransferase variants. ChemCatChem 2022. [DOI: 10.1002/cctc.202200037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Viktoria Heine
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Microbiology CZECH REPUBLIC
| | - Helena Pelantová
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Microbiology CZECH REPUBLIC
| | - Pavla Bojarová
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Microbiology CZECH REPUBLIC
| | - Vladimír Křen
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Microbiology CZECH REPUBLIC
| | - Lothar Elling
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Institute of Biotechnology and Helmholtz-Institute for Biomedical Engineering Pauwelsstr. 20 52074 Aachen GERMANY
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17
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Park BS, Choi YH, Kim MW, Park BG, Kim EJ, Kim JY, Kim JH, Kim BG. Enhancing biosynthesis of 2'-Fucosyllactose in Escherichia coli through engineering lactose operon for lactose transport and α -1,2-Fucosyltransferase for solubility. Biotechnol Bioeng 2022; 119:1264-1277. [PMID: 35099812 DOI: 10.1002/bit.28048] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/09/2022] [Accepted: 01/19/2022] [Indexed: 11/12/2022]
Abstract
2'-Fucosyllactose (2'-FL) is the most abundant oligosaccharide in human milk and one of the most actively studied human milk oligosaccharides (HMO). When 2'-FL is produced through biological production using a microorganism, like Escherichia coli, D-lactose is often externally fed as an acceptor substrate for fucosyltransferase (FT). When D-glucose is used as a carbon source for the cell growth and D-lactose is transported by lactose permease (LacY) in lac operon, D-lactose transport is under the control of catabolite repression (CR), limiting the supply of D-lactose for FT reaction in the cell, hence decreasing the production of 2'-FL. In this study, a remarkable increase of 2'-FL production was achieved by relieving the CR from the lac operon of the host E. coli BL21 and introducing adequate site-specific mutations into α-1,2-FT (FutC) for enhancement of catalytic activity and solubility. For the host engineering, the native lac promoter (Plac ) was substituted for tac promoter (Ptac ), so that the lac operon could be turned on, but not subjected to CR by high D-glucose concentration. Next, for protein engineering of FutC, family multiple sequence analysis for conserved amino acid sequences and protein-ligand substrate docking analysis led us to find several mutation sites, which could increase the solubility of FutC and its activity. As a result, a combination of four mutation sites (F40S/Q150H/C151R/Q239S) was identified as the best candidate, and the quadruple mutant of FutC enhanced 2'-FL titer by 2.4-fold. When the above-mentioned E. coli mutant host transformed with the quadruple mutant of futC was subjected to fed-batch culture, 40 g l-1 of 2'-FL titer was achieved with the productivity of 0.55 g l-1 h-1 and the specific 2'-FL yield of 1.0 g g-1 DCW. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bum Seok Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Yun Hee Choi
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Min Woo Kim
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Beom Gi Park
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Eun-Jung Kim
- Bio-MAX/N-Bio Institute, Seoul National University, Seoul, 08826, South Korea
| | - Jin Young Kim
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Jung Hwa Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea
| | - Byung-Gee Kim
- School of Chemical and Biological Engineering, Seoul National University, Seoul, 08826, South Korea.,Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, 08826, South Korea.,Bio-MAX/N-Bio Institute, Seoul National University, Seoul, 08826, South Korea.,Institute for Sustainable Development (ISD), Seoul National University, Seoul, 08826, South Korea
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18
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Lee H, Shin DJ, Han K, Chin Y, Park JP, Park K, Choi C, Park B, Kim S, Kim S. Simultaneous production of 2′‐fucosyllactose and difucosyllactose by engineered
Escherichia coli
with high secretion efficiency. Biotechnol J 2022; 17:e2100629. [DOI: 10.1002/biot.202100629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/16/2022] [Accepted: 01/19/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Hyun‐Jae Lee
- Department of Food Science and Biotechnology Chung‐Ang University Anseong, Gyeonggi Seoul Republic of Korea
| | - Dong Joo Shin
- Department of Agricultural Biotechnology Seoul National University Seoul Republic of Korea
| | - Kanghee Han
- Department of Food Science and Biotechnology Chung‐Ang University Anseong, Gyeonggi Seoul Republic of Korea
| | - Young‐Wook Chin
- Research Group of Traditional Food Korea Food Research Institute Wanju Republic of Korea
| | - Jong Pil Park
- Department of Food Science and Biotechnology Chung‐Ang University Anseong, Gyeonggi Seoul Republic of Korea
| | - Kyeongsoon Park
- Department of Systems Biotechnology Chung‐Ang University Anseong‐si Seoul Gyeonggi‐do Republic of Korea
| | - Chang‐Hyung Choi
- Division of Cosmetic Science and Technology Daegu Haany University 1 Haanydaero, Gyeongsan‐si Gyeongsangbuk‐do Republic of Korea
| | - Bo‐Ram Park
- Department of Agro‐food Resources National Institute of Agricultural Sciences Rural Development Administration Wanju Republic of Korea
| | - Soo‐Jung Kim
- Department of Integrative Food Bioscience and Biotechnology Chonnam National University Gwangju Republic of Korea
| | - Sun‐Ki Kim
- Department of Food Science and Biotechnology Chung‐Ang University Anseong, Gyeonggi Seoul Republic of Korea
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19
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Liu Z, Li K, Liu X, Zhao J, Yu Y, Wang L, Kong Y, Chen M. Production of microhomogeneous glycopeptide by a mutated NGT according FuncLib with unique sugar as substrate. Enzyme Microb Technol 2021; 154:109949. [PMID: 34864335 DOI: 10.1016/j.enzmictec.2021.109949] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 11/03/2021] [Accepted: 11/08/2021] [Indexed: 11/29/2022]
Abstract
N-glycosylation is one of the most important post-translational modifications of proteins. Cytoplasmic soluble N-glycosyltransferase (NGT) exists in bacteria, which is able to transfer different monosaccharide from sugar nucleotide to the NXS/T(X ≠ Pro) consensus sequence in a polypeptide. At present, the NGT enzymes reported could transfer a variety of different sugars to protein, which will lead to the heterogeneity of the sugar chain and the complexity and instability of the structure and function of glycopeptides. According to the FuncLib algorithm, we obtained mutant ApNGT-P1 from ApNGT (the NGT from Actinobacillus pleuropneumoniae) with increased substrate specificity. Compared with the wild-type ApNGT, mutant ApNGT-P1 could only utilize UDP-Glc as sugar donors. The optimum temperature of ApNGT-P1 was about 40 °C and the optimum pH was 7.5-8.0 in PBS buffer. ApNGT-P1 exhibited better tolerance for K+, Mn2+, Ca2+, and Mg2+, but was strongly inhibited by Na+, Cu2+ and Zn2+. The mutant can be applied to the efficient production of glycosylated peptides or proteins with uniform glucose at their glycosylation sites. Besides, this work provided a feasible pathway for further studies on the improving donor substrates selectivity of NGTs.
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Affiliation(s)
- Zhaoxi Liu
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Kun Li
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Xiaoyu Liu
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Jiayu Zhao
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Yue Yu
- College of Life Sciences, Shandong Normal University, Jinan, Shandong 250013, China
| | - Lushan Wang
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Yun Kong
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China
| | - Min Chen
- The State Key Laboratory of Microbial Technology, National Glycoengineering Research Centers, Shandong University, Qingdao, Shandong 266237, China.
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20
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Xia H, Ye J, Cao H, Liu X, Zhang Y, Liu CC. Enzymatic modular assembly of hybrid Lewis antigens. Org Biomol Chem 2021; 19:8041-8048. [PMID: 34473187 DOI: 10.1039/d1ob01579f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The enzymatic synthesis of hybrid Lewis antigens including KH-1 (Lewis y-Lewis x-Lactose, Ley-Lex-Lac), Lewis a-Lewis x-Lactose (Lea-Lex-Lac), and Lewis b-Lewis x-Lactose (Leb-Lex-Lac) has been achieved using a facile enzymatic modular assembly strategy. Starting from a readily available tetrasaccharide, 3 complex hybrid Lewis antigens were achieved in over 40% total yields in less than 5 linear steps of sequential enzymatic glycosylation using 6 enzyme modules. The regio-selective fucosylation was achieved by simply controlling the donor-acceptor ratio. This strategy provides an easy access to these biologically important complex hybrid Lewis antigens at preparative scales.
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Affiliation(s)
- Hui Xia
- National Glycoengineering Research Center, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based Medicine, and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao 266237, China.
| | - Jinfeng Ye
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Hongzhi Cao
- National Glycoengineering Research Center, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based Medicine, and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao 266237, China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
- Key Laboratory of Marine Drugs of Ministry of Education, Shandong Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Xianwei Liu
- National Glycoengineering Research Center, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based Medicine, and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao 266237, China.
| | - Yan Zhang
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan 250012, China.
| | - Chang-Cheng Liu
- National Glycoengineering Research Center, NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-Based Medicine, and Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology, Shandong University, Qingdao 266237, China.
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
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21
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A Machine Learning Study on the Thermostability Prediction of (R)- ω-Selective Amine Transaminase from Aspergillus terreus. BIOMED RESEARCH INTERNATIONAL 2021; 2021:2593748. [PMID: 34447850 PMCID: PMC8384528 DOI: 10.1155/2021/2593748] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 07/09/2021] [Accepted: 08/04/2021] [Indexed: 12/04/2022]
Abstract
Artificial intelligence technologies such as machine learning have been applied to protein engineering, with unique advantages in protein structure, function prediction, catalytic activity, and other issues in recent years. Screening better mutants is still a bottleneck in protein engineering. In this paper, a new sequence-activity relationship method was analyzed for its application in improving the thermal stability of Aspergillus terreus (R)-ω-selective amine transaminase. The experimental data from 6 single-point mutated enzymes were used as a learning dataset to build models and predict the thermostability of 26 mutants. Based on digital signal processing (DSP), this method digitized the amino acid sequence of proteins by fast Fourier transform (FFT) and then established the best model applying partial least squares regression (PLSR) to screen out all possible mutants, especially those with high performance. In protein engineering, the innovative sequence activity relationship (ISAR) method can make a reasonable prediction using limited experimental data and significantly reduce the experimental cost. The half-life (T1/2) of (R)-ω-transaminase was fitted with the amino acid sequence by the ISAR algorithm, resulting in an R2 of 0.8929 and a cvRMSE of 4.89. At the same time, the mutants with higher T1/2 than the existing ones were predicted, laying the groundwork for better (R)-ω-transaminase in the later stage. The ISAR algorithm is expected to provide a new technique for protein evolution and screening.
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22
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Abstract
Few classes of natural products rival the structural audacity of oligosaccharides. Their complexity, however, has stood as an immense roadblock to translational research, as access to homogeneous material from nature is challenging. Thus, while carbohydrates are critical to the myriad functional and structural aspects of the biological sciences, their behavior is largely descriptive. This challenge presents an attractive opportunity for synthetic chemistry, particularly in the area of human milk science. First, there is an inordinate need for synthesizing homogeneous human milk oligosaccharides (HMOs). Superimposed on this goal is the mission of conducting syntheses at scale to enable animal studies. Herein, we present a personalized rumination of our involvement, and that of our colleagues, which has led to the synthesis and characterization of HMOs and mechanistic probes. Along the way, we highlight chemical, chemoenzymatic, and synthetic biology based approaches. We close with a discussion on emergent challenges and opportunities for synthesis, broadly defined, in human milk science.
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Affiliation(s)
- Lianyan L Xu
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Steven D Townsend
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
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23
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Zhu Y, Luo G, Wan L, Meng J, Lee SY, Mu W. Physiological effects, biosynthesis, and derivatization of key human milk tetrasaccharides, lacto- N-tetraose, and lacto- N-neotetraose. Crit Rev Biotechnol 2021; 42:578-596. [PMID: 34346270 DOI: 10.1080/07388551.2021.1944973] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Human milk oligosaccharides (HMOs) have recently attracted ever-increasing interest because of their versatile physiological functions. In HMOs, two tetrasaccharides, lacto-N-tetraose (LNT) and lacto-N-neotetraose (LNnT), constitute the essential components, each accounting 6% (w/w) of total HMOs. Also, they serve as core structures for fucosylation and sialylation, generating functional derivatives and elongation generating longer chains of core structures. LNT, LNnT, and their fucosylated and/or sialylated derivatives account for more than 30% (w/w) of total HMOs. For derivatization, LNT and LNnT can be modified into a series of complex fucosylated and/or sialylated HMOs by transferring fucose residues at α1,2-, α1,3-, and α1,3/4-linkage and/or sialic acid residues at α2,3- and α2,6-linkage. Such structural diversity allows these HMOs to possess great commercial value and an application potential in the food and pharmaceutical industries. In this review, we first elaborate the physiological functions of these tetrasaccharides and derivatives. Next, we extensively review recent developments in the biosynthesis of LNT, LNnT, and their derivatives in vitro and in vivo by employing advanced enzymatic reaction systems and metabolic engineering strategies. Finally, future perspectives in the synthesis of these HMOs using enzymatic and metabolic engineering approaches are presented.
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Affiliation(s)
- Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Guocong Luo
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Li Wan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Jiawei Meng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Sang Yup Lee
- Department of Chemical and Biomolecular Engineering (BK21 Plus Program), Metabolic and Biomolecular Engineering National Research Laboratory, Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.,Systems Metabolic Engineering and Systems Healthcare Cross-Generation Collaborative Laboratory, KAIST, Daejeon, Republic of Korea.,BioProcess Engineering Research Center and BioInformatics Research Center, KAIST, Daejeon, Republic of Korea
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China
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24
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Jia DX, Peng C, Li JL, Wang F, Liu ZQ, Zheng YG. Redesign of (R)-Omega-Transaminase and Its Application for Synthesizing Amino Acids with Bulky Side Chain. Appl Biochem Biotechnol 2021; 193:3624-3640. [PMID: 34347249 DOI: 10.1007/s12010-021-03616-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Accepted: 07/12/2021] [Indexed: 11/29/2022]
Abstract
ω-Transaminase (ω-TA) is an attractive biocatalyst for stereospecific preparation of amino acids and derivatives, but low catalytic efficiency and unfavorable substrate specificity hamper their industrial application. In this work, to obtain applicable (R)-ω-TA responsible for amination of α-keto acids substrates, the reactivities of eight previously synthesized ω-TAs toward pyruvate using (R)-α-methylbenzylamine ((R)-α-MBA) as amine donor were investigated, and Gibberella zeae TA (GzTA) with the highest (R)-TA activity and stereoselectivity was selected as starting scaffold for engineering. Site-directed mutagenesis around enzymatic active pocket and access tunnel identified three positive mutation sites, S214A, F113L, and V60A. Kinetic analysis synchronously with molecular docking revealed that these mutations afforded desirable alleviation of steric hindrance for pyruvate and α-MBA. Furthermore, the constructed single-, double-, and triple-mutant exhibited varying degrees of improved specificities toward bulkier α-keto acids. Using 2-oxo-2-phenylacetic acid (1d) as substrate, the conversion rate of triple-mutant F113L/V60A/S214A increased by 3.8-fold relative to that of wide-type GzTA. This study provided a practical engineering strategy for improving catalytic efficiency and substrate specificity of (R)-ω-TA. The obtained experience shed light on creating more industrial ω-TAs mutants that can accommodate structurally diverse substrates.
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Affiliation(s)
- Dong-Xu Jia
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China.,Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China
| | - Chen Peng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China.,Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China
| | - Jun-Liang Li
- Hangzhou Zhongmei Huadong Pharmaceutical Co., Ltd., 866 Moganshan Road, Hangzhou, 310005, People's Republic of China
| | - Fan Wang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China.,Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China
| | - Zhi-Qiang Liu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China. .,Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China.
| | - Yu-Guo Zheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China.,Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014, People's Republic of China
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Improving the catalytic efficiency and substrate affinity of a novel esterase from marine Klebsiella aerogenes by random and site-directed mutation. World J Microbiol Biotechnol 2021; 37:106. [PMID: 34037848 DOI: 10.1007/s11274-021-03069-4] [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: 07/23/2020] [Accepted: 05/12/2021] [Indexed: 10/21/2022]
Abstract
A novel esterase (EstKa) from marine Klebsiella aerogenes was characterized with hydrolytic activity against p-nitrophenyl caprylate (pNPC, C8) under optimum conditions (50 °C and pH 8.5). After two rounds of mutagenesis, two highly potential mutants (I6E9 and L7B11) were obtained with prominent activity, substrate affinity and thermostability. I6E9 (L90Q/P96T) and L7B11 (A37S/Q100L/S133G/R138C/Q156R) were 1.56- and 1.65-fold higher than EstKa in relative catalytic efficiency. The influence of each amino acid on enzyme activity was explored by site-directed mutation. The mutants Pro96Thr and Gln156Arg showed 1.29- and 1.48-fold increase in catalytic efficiency (Kcat/Km) and 54.4 and 36.2% decrease in substrate affinity (Km), respectively. The compound mutant Pro96Thr/Gln156Arg exhibited 68.9% decrease in Km and 1.41-fold increase in Kcat/Km relative to EstKa. Homology model structure analysis revealed that the replacement of Gln by hydrophilic Arg on the esterase surface improved the microenvironment stability and the activity. The replacement of Pro by Thr enabled the esterase enzyme to retain 90% relative activity after 3 h incubation at 45 °C. Structural analysis confirmed that the formation of a hydrogen bond leads to a notable increase of catalytic efficiency under high temperature conditions.
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26
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Lu M, Mosleh I, Abbaspourrad A. Engineered Microbial Routes for Human Milk Oligosaccharides Synthesis. ACS Synth Biol 2021; 10:923-938. [PMID: 33909411 DOI: 10.1021/acssynbio.1c00063] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Human milk oligosaccharides (HMOs) are one of the important ingredients in human milk, which have attracted great interest due to their beneficial effect on the health of newborns. The large-scale production of HMOs has been researched using engineered microbial routes due to the availability, safety, and low cost of host strains. In addition, the development of molecular biology technology and metabolic engineering has promoted the effectiveness of HMOs production. According to current reports, 2'-fucosyllactose (2'-FL), 3-fucosyllactose (3-FL), lacto-N-tetraose (LNT), lacto-N-neotetraose (LNnT), 3'-sialyllactose (3'-SL), 6'-sialyllactose (6'-SL), and some fucosylated HMOs with complex structures have been produced via the engineered microbial route, with 2'-FL having been produced the most. However, due to the uncertainty of metabolic patterns, the selection of host strains has certain limitations. Aside from that, the expression of appropriate glycosyltransferase in microbes is key to the synthesis of different HMOs. Therefore, finding a safe and efficient glycosyltransferase has to be addressed when using engineered microbial pathways. In this review, the latest research on the production of HMOs using engineered microbial routes is reported. The selection of host strains and adapting different metabolic pathways helped researchers designing engineered microbial routes that are more conducive to HMOs production.
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Affiliation(s)
- Mengyao Lu
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, 411 Tower Road, Ithaca, New York 14853, United States
| | - Imann Mosleh
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, 411 Tower Road, Ithaca, New York 14853, United States
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, 411 Tower Road, Ithaca, New York 14853, United States
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Wang Y, Yu J. Membrane separation processes for enrichment of bovine and caprine milk oligosaccharides from dairy byproducts. Compr Rev Food Sci Food Saf 2021; 20:3667-3689. [PMID: 33931948 DOI: 10.1111/1541-4337.12758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/07/2021] [Accepted: 03/24/2021] [Indexed: 12/18/2022]
Abstract
Breast milk is an ideal source of human milk oligosaccharides (HMOs) for isolation and purification. However, breast milk is not for sale and at most is distributed to neonatal intensive care units as donor milk. To overcome this limitation, isolating HMOs analogs including bovine milk oligosaccharides (BMOs) and caprine milk oligosaccharides (CMOs) from other sources is timely and significant. Advances in the development of equipment and analytical methods have revealed that dairy processing byproducts are good sources of BMOs and CMOs. Enrichment of these oligosaccharides from dairy byproducts, such as whey, permeate, and mother liquor, is of increasing academic and economic value. The commonly employed approach for oligosaccharides purification is chromatographic technique, but it is only used at lab scale. In the dairy industry, chromatographic methods (large-scale ion exchange, 10,000 L size) are currently routinely used for the isolation/purification of milk proteins (e.g., lactoferrin). In contrast, membrane technology has been proven to be a suitable approach for the isolation and purification of BMOs and CMOs from dairy byproducts. Therefore, this review simply introduces BMOs and CMOs in dairy processing byproducts. This review also summarizes membrane separation processes for isolating and purifying BMOs and CMOs from different dairy byproducts. Finally, the technological challenges and solutions of each processing strategy are discussed in detail.
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Affiliation(s)
- Yi Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin, China
| | - Jinghua Yu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin, China
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Ni Z, Wu J, Li Z, Yuan L, Wang Y, Chen X, Yao J. Enhanced bioproduction of fucosylated oligosaccharide 3-fucosyllactose in engineered Escherichia coli with an improved de novo pathway. Biosci Biotechnol Biochem 2021; 85:1772-1781. [PMID: 33904902 DOI: 10.1093/bbb/zbab074] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 04/22/2021] [Indexed: 01/17/2023]
Abstract
3-fucosyllactose (3-FL) and 2'-fucosyllactose (2'-FL), are two important fucosylated oligosaccharides in human milk. Extensive studies on 2'-FL enabled its official approval for use in infant formula. However, development of 3-FL has been somewhat sluggish due to its low content in human milk and poor yield in enlarged production. Here, an α-1,3-fucosyltransferase mutant was introduced into an engineered Escherichia coli (E. coli) capable of producing GDP-L-fucose, leading to a promising 3-FL titer in a 5.0-L bioreactor. To increase the availability of cofactors (NADPH and GTP) for optimized 3-FL production, zwf, pntAB, and gsk genes were successively overexpressed, finally resulting in a higher 3-FL level with a titer of 35.72 g/L and a yield of 0.82 mol 3-FL/mol lactose. Unexpectedly, the deletion of pfkA gene led to a much lower performance of 3-FL production than the control strain. Still, our strategy achieved the highest 3-FL level in E. coli to date.
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Affiliation(s)
- Zhijian Ni
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China.,Science Island Branch of Graduate School , University of Science & Technology of China, Hefei, P. R. China
| | - Jinyong Wu
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China.,Huainan New Energy Research Center, Institute of Plasma Physics, Chinese Academy of Sciences, Huainan, P. R. China.,Wuhan Zhongke Optics Valley Green Biotechnology Co. Ltd., Wuhan, China
| | - Zhongkui Li
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China.,Science Island Branch of Graduate School , University of Science & Technology of China, Hefei, P. R. China
| | - Lixia Yuan
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China
| | - Yu Wang
- Wuhan Zhongke Optics Valley Green Biotechnology Co. Ltd., Wuhan, China
| | - Xiangsong Chen
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China.,Huainan New Energy Research Center, Institute of Plasma Physics, Chinese Academy of Sciences, Huainan, P. R. China
| | - Jianming Yao
- Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, P. R. China.,Science Island Branch of Graduate School , University of Science & Technology of China, Hefei, P. R. China
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29
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Heine V, Kremers T, Menzel N, Schnakenberg U, Elling L. Electrochemical Impedance Spectroscopy Biosensor Enabling Kinetic Monitoring of Fucosyltransferase Activity. ACS Sens 2021; 6:1003-1011. [PMID: 33595293 DOI: 10.1021/acssensors.0c02206] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Monitoring glycosyltransferases on biosensors is of great interest for pathogen and cancer diagnostics. As a proof of concept, we here demonstrate the layer-by-layer immobilization of a multivalent neoglycoprotein (NGP) as a substrate for a bacterial fucosyltransferase (FucT) and the subsequent binding of the fucose-specific Aleuria aurantia lectin (AAL) on an electrochemical impedance spectroscopy (EIS) sensor. We report for the first time the binding kinetics of a glycosyltransferase in real-time. Highly stable EIS measurements are obtained by the modification of counter and reference electrodes with polypyrrole: polystyrene sulfonate (PPy:PSS). In detail, the N-acetyllactosamine (LacNAc)-carrying NGP was covalently immobilized on the gold working electrode and served as a substrate for the FucT-catalyzed reaction. The LacNAc epitopes were converted to Lewisx (Lex) and detected by AAL. AAL binding to the Lex epitope was further confirmed in a lectin displacement and a competitive lectin binding inhibition experiment. We monitored the individual kinetic processes via EIS. The time constant for covalent immobilization of the NGP was 653 s. The FucT kinetics was the slowest process with a time constant of 1121 s. In contrast, a short time constant of 11.8 s was determined for the interaction of AAL with the modified NGPs. When this process was competed by 400 mM fucose, the binding was significantly slowed down, as indicated by a time constant of 978 s. The kinetics for the displacement of bound AAL by free fucose was observed with a time constant of 424 s. We conclude that this novel EIS biosensor and the applied workflow has the potential to detect FucT and other GT activities in general and further monitor protein-glycan interactions, which may be useful for the detection of pathogenic bacteria and cancer cells in future biomedical applications.
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Affiliation(s)
- Viktoria Heine
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstraße 20, D-52074 Aachen, Germany
| | - Tom Kremers
- Chair of Micro- and Nanosystems and Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Sommerfeldstraße 24, D-52074 Aachen, Germany
| | - Nora Menzel
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstraße 20, D-52074 Aachen, Germany
- Chair of Micro- and Nanosystems and Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Sommerfeldstraße 24, D-52074 Aachen, Germany
| | - Uwe Schnakenberg
- Chair of Micro- and Nanosystems and Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Sommerfeldstraße 24, D-52074 Aachen, Germany
| | - Lothar Elling
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Pauwelsstraße 20, D-52074 Aachen, Germany
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30
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Zhao L, Ma Z, Yin J, Shi G, Ding Z. Biological strategies for oligo/polysaccharide synthesis: biocatalyst and microbial cell factory. Carbohydr Polym 2021; 258:117695. [PMID: 33593568 DOI: 10.1016/j.carbpol.2021.117695] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/20/2021] [Accepted: 01/20/2021] [Indexed: 12/21/2022]
Abstract
Oligosaccharides and polysaccharides constitute the principal components of carbohydrates, which are important biomacromolecules that demonstrate considerable bioactivities. However, the variety and structural complexity of oligo/polysaccharides represent a major challenge for biological and structural explorations. To access structurally defined oligo/polysaccharides, biological strategies using glycoenzyme biocatalysts have shown remarkable synthetic potential attributed to their regioselectivity and stereoselectivity that allow mild, structurally controlled reaction without addition of protecting groups necessary in chemical strategies. This review summarizes recent biotechnological approaches of oligo/polysaccharide synthesis, which mainly includes in vitro enzymatic synthesis and cell factory synthesis. We have discussed the important factors involved in the production of nucleotide sugars. Furthermore, the strategies established in the cell factory and enzymatic syntheses are summarized, and we have highlighted concepts like metabolic flux rebuilding and regulation, enzyme engineering, and route design as important strategies. The research challenges and prospects are also outlined and discussed.
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Affiliation(s)
- Liting Zhao
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, 214122, China.
| | - Zhongbao Ma
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, 214122, China.
| | - Jian Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
| | - Guiyang Shi
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, 214122, China; Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, 214122, China.
| | - Zhongyang Ding
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, 214122, China; Jiangsu Provincial Research Center for Bioactive Product Processing Technology, Jiangnan University, Wuxi, 214122, China.
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Enzymatic Synthesis of Glycans and Glycoconjugates. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2020; 175:231-280. [PMID: 33052414 DOI: 10.1007/10_2020_148] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Glycoconjugates have great potential to improve human health in a multitude of different ways and fields. Prominent examples are human milk oligosaccharides and glycosaminoglycans. The typical choice for the production of homogeneous glycoconjugates is enzymatic synthesis. Through the availability of expression and purification protocols, recombinant Leloir glycosyltransferases are widely applied as catalysts for the synthesis of a wide range of glycoconjugates. Extensive utilization of these enzymes also depends on the availability of activated sugars as building blocks. Multi-enzyme cascades have proven a versatile technique to synthesize and in situ regenerate nucleotide sugar.In this chapter, the functions and mechanisms of Leloir glycosyltransferases are revisited, and the advantage of prokaryotic sources and production systems is discussed. Moreover, in vivo and in vitro pathways for the synthesis of nucleotide sugar are reviewed. In the second part, recent and prominent examples of the application of Leloir glycosyltransferase are given, i.e., the synthesis of glycosaminoglycans, glycoconjugate vaccines, and human milk oligosaccharides as well as the re-glycosylation of biopharmaceuticals, and the status of automated glycan assembly is revisited.
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32
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Mikl M, Dennig A, Nidetzky B. Efficient enzyme formulation promotes Leloir glycosyltransferases for glycoside synthesis. J Biotechnol 2020; 322:74-78. [PMID: 32687957 DOI: 10.1016/j.jbiotec.2020.06.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/26/2020] [Accepted: 06/14/2020] [Indexed: 01/17/2023]
Abstract
Sugar nucleotide-dependent (Leloir) glycosyltransferases are powerful catalysts for glycoside synthesis. Their applicability can be limited due to elaborate production of enzyme preparations deployable in biocatalytic processes. Here, we show that efficient enzyme formulation promotes glycosyltransferases for the synthesis of the natural C-glycoside nothofagin. Adding Brij-35 detergent (1 %, w/v) during sonication of the E. coli BL21-Gold (DE3) expression strain, recovery of Oryza sativa C-glycosyltransferase was enhanced by ∼3-fold, partly due to the release of enzyme activity trapped in insoluble pellet. Freeze drying of the resulting cell-free extract (∼17 U ml-1) reduced the volume ∼20-fold and gave ∼55 mg solids ml-1 liquid processed, with 83 % retention of the original activity and a specific activity of 0.20 U mg-1 solids. The Glycine max sucrose synthase was processed analogously, giving a solid enzyme preparation of 0.28 U mg-1 in 63 % yield. Both enzyme formulations were stable for several weeks. The glycosyltransferase cascade reaction for 3'-β-C-glucosylation of phloretin (60 mM; as inclusion complex with hydroxypropyl-β-cyclodextrin) from UDP-glucose (generated in situ by sucrose synthase from 500 mM sucrose and 0.5 mM UDP) showed excellent performance metrics (≥ 98 % yield; 3.2 g l-1 h-1 space-time yield; ∼90 regeneration cycles for UDP). Collectively, our study demonstrates a facile procedure for solid glycosyltransferase formulations practically usable in glycoside synthesis.
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Affiliation(s)
- Markus Mikl
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria
| | - Alexander Dennig
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010, Graz, Austria
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010, Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010, Graz, Austria.
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Pérez-Escalante E, Alatorre-Santamaría S, Castañeda-Ovando A, Salazar-Pereda V, Bautista-Ávila M, Cruz-Guerrero AE, Flores-Aguilar JF, González-Olivares LG. Human milk oligosaccharides as bioactive compounds in infant formula: recent advances and trends in synthetic methods. Crit Rev Food Sci Nutr 2020; 62:181-214. [DOI: 10.1080/10408398.2020.1813683] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Emmanuel Pérez-Escalante
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, Colonia Carboneras. CP. 42184. Mineral de la Reforma, Hidalgo, México
| | - Sergio Alatorre-Santamaría
- Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud. Departamento de Biotecnología, Colonia Vicentina AP 09340, Ciudad de México, México
| | - Araceli Castañeda-Ovando
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, Colonia Carboneras. CP. 42184. Mineral de la Reforma, Hidalgo, México
| | - Verónica Salazar-Pereda
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, Colonia Carboneras. CP. 42184. Mineral de la Reforma, Hidalgo, México
| | - Mirandeli Bautista-Ávila
- Universidad Autónoma del Estado de Hidalgo. Área Académica de Farmacia, Instituto de Ciencias de la Salud. Ex-Hacienda la Concepción. San Agustín Tlaxiaca, Hidalgo, México
| | - Alma Elizabeth Cruz-Guerrero
- Universidad Autónoma Metropolitana, Unidad Iztapalapa. División de Ciencias Biológicas y de la Salud. Departamento de Biotecnología, Colonia Vicentina AP 09340, Ciudad de México, México
| | - Juan Francisco Flores-Aguilar
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, Colonia Carboneras. CP. 42184. Mineral de la Reforma, Hidalgo, México
| | - Luis Guillermo González-Olivares
- Universidad Autónoma del Estado de Hidalgo, Área Académica de Química. Ciudad del Conocimiento, Carretera Pachuca-Tulancingo km 4.5, Colonia Carboneras. CP. 42184. Mineral de la Reforma, Hidalgo, México
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34
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From lab bench to formulated ingredient: Characterization, production, and commercialization of human milk oligosaccharides. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104052] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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35
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Pei S, Ruan X, Liu J, Song W, Chen X, Luo Q, Liu L, Wu J. Enhancement of α-ketoisovalerate production by relieving the product inhibition of l-amino acid deaminase from Proteus mirabilis. Chin J Chem Eng 2020. [DOI: 10.1016/j.cjche.2020.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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36
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Deng J, Lv X, Li J, Du G, Chen J, Liu L. Recent advances and challenges in microbial production of human milk oligosaccharides. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s43393-020-00004-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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37
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Mikl M, Dennig A, Nidetzky B. WITHDRAWN: Efficient enzyme formulation promotes Leloir glycosyltransferases for glycoside synthesis. J Biotechnol 2020; 324S:100023. [PMID: 34154728 DOI: 10.1016/j.btecx.2020.100023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 05/26/2020] [Accepted: 06/14/2020] [Indexed: 11/28/2022]
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published in BIOTEC, 322C (2020) 74-78, https://doi.org/10.1016/j.jbiotec.2020.06.023. The duplicate article has therefore been withdrawn. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Markus Mikl
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010 Graz, Austria
| | - Alexander Dennig
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010 Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010 Graz, Austria
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, NAWI Graz, 8010 Graz, Austria; Austrian Centre of Industrial Biotechnology (acib), 8010 Graz, Austria.
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38
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Weinstein J, Khersonsky O, Fleishman SJ. Practically useful protein-design methods combining phylogenetic and atomistic calculations. Curr Opin Struct Biol 2020; 63:58-64. [PMID: 32505941 DOI: 10.1016/j.sbi.2020.04.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Accepted: 04/06/2020] [Indexed: 12/11/2022]
Abstract
Our ability to design new or improved biomolecular activities depends on understanding the sequence-function relationships in proteins. The large size and fold complexity of most proteins, however, obscure these relationships, and protein-optimization methods continue to rely on laborious experimental iterations. Recently, a deeper understanding of the roles of stability-threshold effects and biomolecular epistasis in proteins has led to the development of hybrid methods that combine phylogenetic analysis with atomistic design calculations. These methods enable reliable and even single-step optimization of protein stability, expressibility, and activity in proteins that were considered outside the scope of computational design. Furthermore, ancestral-sequence reconstruction produces insights on missing links in the evolution of enzymes and binders that may be used in protein design. Through the combination of phylogenetic and atomistic calculations, the long-standing goal of general computational methods that can be universally applied to study and optimize proteins finally seems within reach.
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Affiliation(s)
- Jonathan Weinstein
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Olga Khersonsky
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel.
| | - Sarel J Fleishman
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel.
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39
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Wan L, Zhu Y, Zhang W, Mu W. α-l-Fucosidases and their applications for the production of fucosylated human milk oligosaccharides. Appl Microbiol Biotechnol 2020; 104:5619-5631. [DOI: 10.1007/s00253-020-10635-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/11/2020] [Accepted: 04/17/2020] [Indexed: 12/12/2022]
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40
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Ali M, Ishqi HM, Husain Q. Enzyme engineering: Reshaping the biocatalytic functions. Biotechnol Bioeng 2020; 117:1877-1894. [DOI: 10.1002/bit.27329] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 01/13/2020] [Accepted: 03/09/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Misha Ali
- Department of Biochemistry, Faculty of Life SciencesAligarh Muslim University Aligarh Uttar Pradesh India
| | | | - Qayyum Husain
- Department of Biochemistry, Faculty of Life SciencesAligarh Muslim University Aligarh Uttar Pradesh India
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41
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Qu G, Li A, Acevedo‐Rocha CG, Sun Z, Reetz MT. Die zentrale Rolle der Methodenentwicklung in der gerichteten Evolution selektiver Enzyme. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201901491] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ge Qu
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
| | - Aitao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Collaborative Innovation Center for Green Transformation of Bio-resources Hubei Key Laboratory of Industrial Biotechnology College of Life Sciences Hubei University 368 Youyi Road Wuchang Wuhan 430062 China
| | | | - Zhoutong Sun
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
| | - Manfred T. Reetz
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim Deutschland
- Department of Chemistry, Hans-Meerwein-Straße 4 Philipps-Universität 35032 Marburg Deutschland
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42
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Qu G, Li A, Acevedo‐Rocha CG, Sun Z, Reetz MT. The Crucial Role of Methodology Development in Directed Evolution of Selective Enzymes. Angew Chem Int Ed Engl 2020; 59:13204-13231. [PMID: 31267627 DOI: 10.1002/anie.201901491] [Citation(s) in RCA: 242] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Indexed: 12/14/2022]
Affiliation(s)
- Ge Qu
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
| | - Aitao Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Collaborative Innovation Center for Green Transformation of Bio-resources Hubei Key Laboratory of Industrial Biotechnology College of Life Sciences Hubei University 368 Youyi Road Wuchang Wuhan 430062 China
| | | | - Zhoutong Sun
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
| | - Manfred T. Reetz
- Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences 32 West 7th Avenue, Tianjin Airport Economic Area Tianjin 300308 China
- Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim Germany
- Department of Chemistry, Hans-Meerwein-Strasse 4 Philipps-University 35032 Marburg Germany
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43
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Park Y, Shin J, Yang J, Kim H, Jung Y, Oh H, Kim Y, Hwang J, Park M, Ban C, Jeong KJ, Kim SK, Kweon DH. Plasmid Display for Stabilization of Enzymes Inside the Cell to Improve Whole-Cell Biotransformation Efficiency. Front Bioeng Biotechnol 2020; 7:444. [PMID: 31998709 PMCID: PMC6967079 DOI: 10.3389/fbioe.2019.00444] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 12/11/2019] [Indexed: 11/13/2022] Open
Abstract
Recombinant whole-cell biocatalysts are widely used for biotransformation of valuable products. However, some key enzymes involved in biotransformation processes are unstable and cannot be easily expressed in the functional form. In this study, we describe a versatile platform for enzyme stabilization inside the cell: Intracellularly Immobilized Enzyme System (IIES). A 1,2-fucosyltransferase from Pedobactor saltans (PsFL) and a 1,3-fucosyltransferase from Helicobacter pylori (HpFL), chosen as model proteins, were fused with Oct-1 DNA-binding domain, which mediated the formation of a plasmid-protein complex. Oct-1 fusion enabled both soluble and stable expression of recombinant proteins in the cytoplasm because the fusion proteins were stabilized on the plasmid like immobilized enzymes bound to solid surface. As a result, Oct-1-fusion proteins exhibited significantly greater product titer and yield than non-fusion proteins. Use of fusion proteins PsFL-Oct-1 with C-terminal Oct-1 and Oct-1-PsFL with N-terminal Oct-1 resulted in ~3- and ~2-fold higher 2'-fucosyllactose titers, respectively, than with the use of PsFL alone. When Oct-1 was fused to HpFL, which requires dimerization through heptad repeats, almost two times more 3-fucosyllactose was produced. Fucosyllactose has been used as a food additive because it has various beneficial effects on human health. We anticipate that IIES using Oct-1 fusion protein developed in this study can be applied to stabilize other unstable enzymes.
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Affiliation(s)
- Yunjeong Park
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Jonghyeok Shin
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Jinkyeong Yang
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Hooyeon Kim
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Younghun Jung
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Hyunseok Oh
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Yongjoon Kim
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Jaehyeon Hwang
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Myeongseo Park
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea
| | - Choongjin Ban
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea.,Institute of Biomolecule Control, Sungkyunkwan University, Suwon-si, South Korea
| | - Ki Jun Jeong
- Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, South Korea
| | - Sun-Ki Kim
- Department of Food Science and Technology, Chung-Ang University, Anseong, South Korea
| | - Dae-Hyuk Kweon
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon-si, South Korea.,Institute of Biomolecule Control, Sungkyunkwan University, Suwon-si, South Korea.,Institute of Biologics, Sungkyunkwan University, Suwon-si, South Korea
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44
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Gao T, Yan J, Liu CC, Palma AS, Guo Z, Xiao M, Chen X, Liang X, Chai W, Cao H. Chemoenzymatic Synthesis of O-Mannose Glycans Containing Sulfated or Nonsulfated HNK-1 Epitope. J Am Chem Soc 2019; 141:19351-19359. [PMID: 31738061 DOI: 10.1021/jacs.9b08964] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The human natural killer-1 (HNK-1) epitope is a unique sulfated trisaccharide sequence presented on O- and N-glycans of various glycoproteins and on glycolipids. It is overexpressed in the nervous system and plays crucial roles in nerve regeneration, synaptic plasticity, and neuronal diseases. However, the investigation of functional roles of HNK-1 in a more complex glycan context at the molecular level remains a big challenge due to lack of access to related structurally well-defined complex glycans. Herein, we describe a highly efficient chemoenzymatic approach for the first collective synthesis of HNK-1-bearing O-mannose glycans with different branching patterns, and for their nonsulfated counterparts. The successful strategy relies on both chemical glycosylation of a trisaccharide lactone donor for the introduction of sulfated HNK-1 branch and substrate promiscuities of bacterial glycosyltransferases that can tolerate sulfated substrates for enzymatic diversification. Glycan microarray analysis with the resulting complex synthetic glycans demonstrated their recognition by two HNK-1-specific antibodies including anti-HNK-1/N-CAM (CD57) and Cat-315, which provided further evidence for the recognition epitopes of these antibodies and the essential roles of the sulfate group for HNK-1 glycan-antibody recognition.
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Affiliation(s)
- Tian Gao
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology , Shandong University , Qingdao 266237 , China.,Laboratory for Marine Drugs and Bioproducts , Pilot National Laboratory for Marine Science and Technology (Qingdao) , Qingdao 266237 , China
| | - Jingyu Yan
- Key Laboratory of Separation Science for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023 , China
| | - Chang-Cheng Liu
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology , Shandong University , Qingdao 266237 , China.,Laboratory for Marine Drugs and Bioproducts , Pilot National Laboratory for Marine Science and Technology (Qingdao) , Qingdao 266237 , China
| | - Angelina S Palma
- UCIBIO, Department of Chemistry, Faculty of Science and Technology , NOVA University of Lisbon , Caparica 2829-516 , Portugal
| | - Zhimou Guo
- Key Laboratory of Separation Science for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023 , China
| | - Min Xiao
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology , Shandong University , Qingdao 266237 , China
| | - Xi Chen
- Department of Chemistry , University of California , Davis , California 95616 , United States
| | - Xinmiao Liang
- Key Laboratory of Separation Science for Analytical Chemistry , Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023 , China
| | - Wengang Chai
- The Glycosciences Laboratory, Faculty of Medicine , Imperial College London , London SW7 2AZ , United Kingdom
| | - Hongzhi Cao
- National Glycoengineering Research Center, State Key Laboratory of Microbial Technology, Shandong Key Laboratory of Carbohydrate Chemistry and Glycobiology , Shandong University , Qingdao 266237 , China.,Laboratory for Marine Drugs and Bioproducts , Pilot National Laboratory for Marine Science and Technology (Qingdao) , Qingdao 266237 , China
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45
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Sinha R, Shukla P. Current Trends in Protein Engineering: Updates and Progress. Curr Protein Pept Sci 2019; 20:398-407. [PMID: 30451109 DOI: 10.2174/1389203720666181119120120] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 12/15/2022]
Abstract
Proteins are one of the most important and resourceful biomolecules that find applications in health, industry, medicine, research, and biotechnology. Given its tremendous relevance, protein engineering has emerged as significant biotechnological intervention in this area. Strategic utilization of protein engineering methods and approaches has enabled better enzymatic properties, better stability, increased catalytic activity and most importantly, interesting and wide range applicability of proteins. In fact, the commercialization of engineered proteins have manifested in economically beneficial and viable solutions for industry and healthcare sector. Protein engineering has also evolved to become a powerful tool contributing significantly to the developments in both synthetic biology and metabolic engineering. The present review revisits the current trends in protein engineering approaches such as rational design, directed evolution, de novo design, computational approaches etc. and encompasses the recent progresses made in this field over the last few years. The review also throws light on advanced or futuristic protein engineering aspects, which are being explored for design and development of novel proteins with improved properties or advanced applications.
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Affiliation(s)
| | - Pratyoosh Shukla
- Enzyme Technology and Protein Bioinformatics Laboratory, Department of Microbiology, Maharshi Dayanand University, Rohtak-124001, Haryana, India
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46
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Deng J, Gu L, Chen T, Huang H, Yin X, Lv X, Liu Y, Li N, Liu Z, Li J, Du G, Liu L. Engineering the Substrate Transport and Cofactor Regeneration Systems for Enhancing 2'-Fucosyllactose Synthesis in Bacillus subtilis. ACS Synth Biol 2019; 8:2418-2427. [PMID: 31550146 DOI: 10.1021/acssynbio.9b00314] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Human milk oligosaccharides (HMOs) have been proven to be beneficial to infants' intestinal health and immune systems. 2'-Fucosyllactose (2'-FL) is the most abundant and thoroughly studied HMO and has been approved to be an additive of infant formula. How to construct efficient and safe microbial cell factories for the production of 2'-FL attracts increasing attention. In this work, we engineered the Bacillus subtilis as an efficient 2'-FL producer by engineering the substrate transport and cofactor guanosine 5'-triphosphate (GTP) regeneration systems. First, we constructed a synthesis pathway for the 2'-FL precursor guanosine 5'-diphosphate-l-fucose (GDP-l-fucose) by introducing the salvage pathway gene fkp from Bacteriodes fragilis and improved the fucose importation by overexpressing the transporters. Then, the complete synthesis pathway of 2'-FL was constructed by introducing the heterologous fucosyltransferases from different sources, and it was found that the gene from Helicobacter pylori was the best one for 2'-FL synthesis. We also improved the substrate lactose importation by introducing heterologous lactose permeases and eliminated endogenous β-galactosidase (yesZ) to block the lactose degradation. Next, the production of 2'-FL and GDP-l-fucose was improved by fine-tuning the expression of cofactor guanosine 5'-triphosphate regeneration module genes gmd, ndk, guaA, guaC, ykfN, deoD, and xpt. Finally, a 3 L fed-batch fermentation was performed, and the highest 2'-FL titer reached 5.01 g/L with a yield up to 0.85 mol/mol fucose. We optimized the synthesis modules of 2'-FL in B. subtilis, and this provides a good starting point for metabolic engineering to further improve 2'-FL production in the future.
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Affiliation(s)
- Jieying Deng
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Liuyan Gu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Taichi Chen
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Hao Huang
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Xiaoqiang Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Xueqin Lv
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Yanfeng Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Nan Li
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co, Ltd., Shanghai 200436, China
| | - Zhenmin Liu
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co, Ltd., Shanghai 200436, China
| | - Jianghua Li
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Guocheng Du
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Long Liu
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi 214122, China
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47
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Tan Y, Zhang Y, Han Y, Liu H, Chen H, Ma F, Withers SG, Feng Y, Yang G. Directed evolution of an α1,3-fucosyltransferase using a single-cell ultrahigh-throughput screening method. SCIENCE ADVANCES 2019; 5:eaaw8451. [PMID: 31633018 PMCID: PMC6785251 DOI: 10.1126/sciadv.aaw8451] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 09/17/2019] [Indexed: 05/09/2023]
Abstract
Fucosylated glycoconjugates are involved in a variety of physiological and pathological processes. However, economical production of fucosylated drugs and prebiotic supplements has been hampered by the poor catalytic efficiency of fucosyltransferases. Here, we developed a fluorescence-activated cell sorting system that enables the ultrahigh-throughput screening (>107 mutants/hour) of such enzymes and designed a companion strategy to assess the screening performance of the system. After three rounds of directed evolution, a mutant M32 of the α1,3-FucT from Helicobacter pylori was identified with 6- and 14-fold increases in catalytic efficiency (k cat/K m) for the synthesis of Lewis x and 3'-fucosyllactose, respectively. The structure of the M32 mutant revealed that the S45F mutation generates a clamp-like structure that appears to improve binding of the galactopyranose ring of the acceptor substrate. Moreover, molecular dynamic simulations reveal that helix α5, is more mobile in the M32 mutant, possibly explaining its high fucosylation activity.
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Affiliation(s)
- Yumeng Tan
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yong Zhang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yunbin Han
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Hao Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Haifeng Chen
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fuqiang Ma
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- CAS Key Laboratory of Biomedical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, China
| | - Stephen G. Withers
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Yan Feng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Guangyu Yang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
- Corresponding author.
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48
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Choi YH, Park BS, Seo JH, Kim BG. Biosynthesis of the human milk oligosaccharide 3-fucosyllactose in metabolically engineered Escherichia coli via the salvage pathway through increasing GTP synthesis and β-galactosidase modification. Biotechnol Bioeng 2019; 116:3324-3332. [PMID: 31478191 DOI: 10.1002/bit.27160] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/27/2019] [Accepted: 08/25/2019] [Indexed: 12/13/2022]
Abstract
3-Fucosyllactose (3-FL) is one of the major fucosylated oligosaccharides in human milk. Along with 2'-fucosyllactose (2'-FL), it is known for its prebiotic, immunomodulator, neonatal brain development, and antimicrobial function. Whereas the biological production of 2'-FL has been widely studied and made significant progress over the years, the biological production of 3-FL has been hampered by the low activity and insoluble expression of α-1,3-fucosyltransferase (FutA), relatively low abundance in human milk oligosaccharides compared with 2'-FL, and lower digestibility of 3-FL than 2'-FL by bifidobacteria. In this study, we report the gram-scale production of 3-FL using E. coli BL21(DE3). We previously generated the FutA quadruple mutant (mFutA) with four site mutations at S46F, A128N, H129E, Y132I, and its specific activity was increased by nearly 15 times compared with that of wild-type FutA owing to the increase in kcat and the decrease in Km . We overexpressed mFutA in its maximum expression level, which was achieved by the optimization of yeast extract concentration in culture media. We also overexpressed L-fucokinase/GDP- L-fucose pyrophosphorylase to increase the supply of GDP-fucose in the cytoplasm. To increase the mass of recombinant whole-cell catalysts, the host E. coli BW25113 was switched to E. coli BL21(DE3) because of the lower acetate accumulation of E. coli BL21(DE3) than that of E. coli BW25113. Finally, the lactose operon was modified by partially deleting the sequence of LacZ (lacZΔm15) for better utilization of D-lactose. Production using the lacZΔm15 mutant yielded 3-FL concentration of 4.6 g/L with the productivity of 0.076 g·L-1 ·hr-1 and the specific 3-FL yield of 0.5 g/g dry cell weight.
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Affiliation(s)
- Yun Hee Choi
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Republic of Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea
| | - Bum Seok Park
- Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea.,School of Chemical and Biological Engineering, Institute of Engineering Research, Seoul National University, Seoul, Republic of Korea
| | - Joo-Hyun Seo
- Department of Bio and Fermentation Convergence Technology, Kookmin University, Seoul, Republic of Korea
| | - Byung-Gee Kim
- Interdisciplinary Program in Bioengineering, Seoul National University, Seoul, Republic of Korea.,Institute of Molecular Biology and Genetics, Seoul National University, Seoul, Republic of Korea.,School of Chemical and Biological Engineering, Institute of Engineering Research, Seoul National University, Seoul, Republic of Korea
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49
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Heine V, Boesveld S, Pelantová H, Křen V, Trautwein C, Strnad P, Elling L. Identifying Efficient Clostridium difficile Toxin A Binders with a Multivalent Neo-Glycoprotein Glycan Library. Bioconjug Chem 2019; 30:2373-2383. [PMID: 31479241 DOI: 10.1021/acs.bioconjchem.9b00486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Clostridium difficile infections cause gastrointestinal disorders and can lead to life-threatening conditions. The symptoms can vary from severe diarrhea to the formation of pseudomembranous colitis and therefore trigger a need for new therapies. The initial step of disease is the binding of the bacterial enterotoxins toxin A and B to the cell surface of epithelial intestinal cells. Scavenging of the toxins is crucial to inhibit their fatal effect in the human body and circumvent the administration of antibiotics. Cell surface glycans are common as ligands for TcdA. Although crucial for carbohydrate-protein interactions, a multivalent presentation of glycans for binding has been hardly considered. Here, we establish a neo-glycoprotein-based glycan library to identify an effective multivalent glycan ligand for TcdA. It comprises 40 different glycan epitopes based on N-acetyllactosamine precursors. Nine structures exhibit strong binding of the receptor domain. Among them, the Lewisy-Lewisx-epitope shows the best performance for binding both the receptor domain and the holotoxin. Therefore, the glycan was synthesized de novo and coupled to BSA as a scaffold for multivalent presentation. The corresponding neo-glycoprotein facilitates the proper scavenging of TcdA in vitro and effectively protects HT29 cells from TcdA-induced cell damage.
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Affiliation(s)
- Viktoria Heine
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering , RWTH Aachen University , Pauwelsstrasse 20 , 52074 Aachen , Germany
| | - Sarah Boesveld
- Department of Internal Medicine III, University Hospital , RWTH Aachen University , Pauwelsstrasse 30 , 52074 Aachen , Germany
| | - Helena Pelantová
- Institute of Microbiology , Czech Academy of Sciences , Vídeňská 1083 , 14220 Prague , Czech Republic
| | - Vladimír Křen
- Institute of Microbiology , Czech Academy of Sciences , Vídeňská 1083 , 14220 Prague , Czech Republic
| | - Christian Trautwein
- Department of Internal Medicine III, University Hospital , RWTH Aachen University , Pauwelsstrasse 30 , 52074 Aachen , Germany
| | - Pavel Strnad
- Department of Internal Medicine III, University Hospital , RWTH Aachen University , Pauwelsstrasse 30 , 52074 Aachen , Germany
| | - Lothar Elling
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering , RWTH Aachen University , Pauwelsstrasse 20 , 52074 Aachen , Germany
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Li J, Yu L, Li J, Xie L, Zhang R, Wang H. Establishment of a high throughput-screening system for nucleoside deoxyribosyltransferase II mutant enzymes with altered substrate specificity. J Biosci Bioeng 2019; 128:22-27. [DOI: 10.1016/j.jbiosc.2019.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 01/02/2019] [Accepted: 01/04/2019] [Indexed: 12/23/2022]
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