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Wang W, Zhou R, Di S, Mao X, Huang WC. Switchable CO 2-Responsive Janus Nanoparticle for Lipase Catalysis in Pickering Emulsion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:9967-9973. [PMID: 38639643 DOI: 10.1021/acs.jafc.4c00498] [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: 04/20/2024]
Abstract
The use of convertible immobilized enzyme carriers is crucial for biphasic catalytic reactions conducted in Pickering emulsions. However, the intense mechanical forces during the conversion process lead to enzyme leakage, affecting the stability of the immobilized enzymes. In this study, a CO2-responsive switchable Janus (CrSJ) nanoparticle (NP) was developed using silica NP, with one side featuring aldehyde groups and the other side adsorbing N,N-dimethyldodecylamine. A switchable Pickering emulsion catalytic system for biphasic interface reactions was prepared by covalently immobilizing lipase onto the CrSJ NPs. The CO2-responsive nature of the CrSJ NPs allowed for rapid conversion of the Pickering emulsion, and covalent immobilization substantially reduced lipase leakage while enhancing the stability of the immobilization during the conversion process. Impressively, after repeated transformations, the Pickering emulsion still maintains its original structure. Following 10 consecutive cycles of esterification and hydrolysis reactions, the immobilized enzyme's activity remains at 77.7 and 79.5% of its initial activity, respectively. The Km of the CrSJ catalytic system showed no significant change compared to the free enzyme, while its Vmax values were 1.2 and 1.6 times that of the free enzyme in esterification and hydrolysis reactions, respectively.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Ruoyu Zhou
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Simiao Di
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Xiangzhao Mao
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
| | - Wen-Can Huang
- State Key Laboratory of Marine Food Processing and Safety Control, College of Food Science and Engineering, Ocean University of China, Qingdao 266404, China
- Qingdao Key Laboratory of Food Biotechnology, Qingdao 266404, China
- Key Laboratory of Biological Processing of Aquatic Products, China National Light Industry, Qingdao 266404, China
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Liu XX, Wang Y, Zhang JH, Lu YF, Dong ZX, Yue C, Huang XQ, Zhang SP, Li DD, Yao LG, Tang CD. Engineering Escherichia coli for high-yielding 2,5-Dimethylpyrazine synthesis from L-Threonine by reconstructing metabolic pathways and enhancing cofactors regeneration. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:44. [PMID: 38500189 PMCID: PMC10949639 DOI: 10.1186/s13068-024-02487-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 03/04/2024] [Indexed: 03/20/2024]
Abstract
2,5-Dimethylpyrazine (2,5-DMP) is important pharmaceutical raw material and food flavoring agent. Recently, engineering microbes to produce 2,5-DMP has become an attractive alternative to chemical synthesis approach. In this study, metabolic engineering strategies were used to optimize the modified Escherichia coli BL21 (DE3) strain for efficient synthesis of 2,5-DMP using L-threonine dehydrogenase (EcTDH) from Escherichia coli BL21, NADH oxidase (EhNOX) from Enterococcus hirae, aminoacetone oxidase (ScAAO) from Streptococcus cristatus and L-threonine transporter protein (EcSstT) from Escherichia coli BL21, respectively. We further optimized the reaction conditions for synthesizing 2,5-DMP. In optimized conditions, the modified strain can convert L-threonine to obtain 2,5-DMP with a yield of 2897.30 mg/L. Therefore, the strategies used in this study contribute to the development of high-level cell factories for 2,5-DMP.
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Affiliation(s)
- Xin-Xin Liu
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Yao Wang
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Jian-Hui Zhang
- Postdoctoral Innovation Practice Base, She Dian Lao Jiu Co. Ltd., 2 Liquor Avenue, Nanyang, Henan, 473300, People's Republic of China
| | - Yun-Feng Lu
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Zi-Xing Dong
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Chao Yue
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Xian-Qing Huang
- College of Food Science and Technology, Henan Agricultural University, 63 Agricultural Road, Zhengzhou, Henan, 450002, People's Republic of China
| | - Si-Pu Zhang
- Henan Academy of Agricultural Sciences, Zhengzhou, 450002, People's Republic of China
| | - Dan-Dan Li
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China.
| | - Lun-Guang Yao
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China.
| | - Cun-Duo Tang
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor, Henan International Joint Laboratory of Insect Biology and Henan Key Laboratory of Insect Biology in Funiu Mountain, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China.
- Postdoctoral Innovation Practice Base, She Dian Lao Jiu Co. Ltd., 2 Liquor Avenue, Nanyang, Henan, 473300, People's Republic of China.
- College of Food Science and Technology, Henan Agricultural University, 63 Agricultural Road, Zhengzhou, Henan, 450002, People's Republic of China.
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Xi Z, Li L, Liu Z, Wu X, Xu Y, Zhang R. Rational Design of l-Threonine Transaldolase-Mediated System for Enhanced Florfenicol Intermediate Production. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:461-474. [PMID: 38153324 DOI: 10.1021/acs.jafc.3c05267] [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: 12/29/2023]
Abstract
l-threo-p-methylsulfonylphenylserine (compound 1b) is the main intermediate of florfenicol, and its efficient synthesis has been the subject of current research. Herein, Burkholderia diffusa l-threonine transaldolase (BuLTTA) was rationally designed based on the sequence-structure-function relationship. A mutant M4 (Asn35Ser/Thr352Asn) could produce 35.5 mM 1b with 88.8% conversion and 93.8% diastereoselectivity, 314 and 129% of the values observed for wild-type BuLTTA. Molecular dynamics simulations indicated that the shortened distance between key active site residues and the transition state (PLP-1b) and the improved hydrogen bond force enhanced the catalytic performance of the M4 variant. Then, the mutant M4 was combined with K. kurtzmanii alcohol dehydrogenase (KkADH) to eliminate the BuLTTA-inhibiting byproduct acetaldehyde, and a cosubstrate was added to regenerate the ADH cofactor NADH. Under optimized conditions, the yield of 1b reached 115.2 mM with a conversion of 96% and a diastereoselectivity of 95.5%. This work provides a new strategy for the efficient and sustainable production of 1b.
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Affiliation(s)
- Zhiwen Xi
- Lab of Brewing Microbiology and Applied Enzymology, School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
| | - Lihong Li
- Lab of Brewing Microbiology and Applied Enzymology, School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
| | - Zhiyong Liu
- Lab of Brewing Microbiology and Applied Enzymology, School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
| | - Xiaolong Wu
- Department of Infection Control, Affiliated Hospital of Jiangnan University, 214122 Wuxi, P. R. China
| | - Yan Xu
- Lab of Brewing Microbiology and Applied Enzymology, School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
| | - Rongzhen Zhang
- Lab of Brewing Microbiology and Applied Enzymology, School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education, Jiangnan University, Wuxi 214122, P. R. China
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Shi HL, Yuan SW, Xi XQ, Xie YL, Yue C, Zhang YJ, Yao LG, Xue C, Tang CD. Engineering of formate dehydrogenase for improving conversion potential of carbon dioxide to formate. World J Microbiol Biotechnol 2023; 39:352. [PMID: 37864750 DOI: 10.1007/s11274-023-03739-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 08/24/2023] [Indexed: 10/23/2023]
Abstract
Formate dehydrogenase (FDH) is a D-2-hydroxy acid dehydrogenase, which can reversibly reduce CO2 to formate and thus act as non-photosynthetic CO2 reductase. In order to increase catalytic efficiency of formate dehydrogenase for CO2 reduction, two mutants V328I/F285W and V354G/F285W were obtained of which reduction activity was about two times more than the parent CbFDHM2, and the formate production from CO2 catalyzed by mutants were 2.9 and 2.7-fold higher than that of the parent CbFDHM2. The mutants had greater potential in CO2 reduction. The optimal temperature for V328I/F285W and V354G/F285W was 55 °C, and they showed increasement of relative activity under 45 °C to 55 °C compared with parent. The optimal pH for the mutants was 9.0, and they showed excellent stability in pH 4.0-11.5. The kcat/Km values of mutants were 1.75 times higher than that of the parent. Then the molecular basis for its improvement of biochemical characteristics were preliminarily elucidated by computer-aided methods. All of these results further established a solid foundation for molecular modification of formate dehydrogenase and CO2 reduction.
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Affiliation(s)
- Hong-Ling Shi
- School of Bioengineering, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, Liaoning, People's Republic of China
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China
| | - Shu-Wei Yuan
- School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe East Road, Xinxiang, 453007, Henan, People's Republic of China
| | - Xiao-Qi Xi
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China
| | - Yu-Li Xie
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China
| | - Chao Yue
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China
| | - Ying-Jun Zhang
- Henan Engineering Technology Research Center for Mushroom-based Foods, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China
| | - Lun-Guang Yao
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China.
| | - Chuang Xue
- School of Bioengineering, Dalian University of Technology, 2 Linggong Road, Dalian, 116024, Liaoning, People's Republic of China.
| | - Cun-Duo Tang
- Henan Provincial Engineering Laboratory of Insect Bio-reactor and College of Life Science and Agricultural Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang, 473061, Henan, People's Republic of China.
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Bearne SL. Design and evaluation of substrate-product analog inhibitors for racemases and epimerases utilizing a 1,1-proton transfer mechanism. Methods Enzymol 2023; 690:397-444. [PMID: 37858537 DOI: 10.1016/bs.mie.2023.06.014] [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] [Indexed: 10/21/2023]
Abstract
Racemases and epimerases catalyze the inversion of stereochemistry at asymmetric carbon atoms to generate stereoisomers that often play important roles in normal and pathological physiology. Consequently, there is interest in developing inhibitors of these enzymes for drug discovery. A strategy for the rational design of substrate-product analog (SPA) inhibitors of racemases and epimerases utilizing a direct 1,1-proton transfer mechanism is elaborated. This strategy assumes that two groups on the asymmetric carbon atom remain fixed at active-site binding determinants, while the hydrogen and third, motile group move during catalysis, with the latter potentially traveling between an R- and S-pocket at the active site. SPAs incorporate structural features of the substrate and product, often with geminal disubstitution on the asymmetric carbon atom to simultaneously present the motile group to both the R- and S-pockets. For racemases operating on substrates bearing three polar groups (glutamate, aspartate, and serine racemases) or with compact, hydrophobic binding pockets (proline racemase), substituent motion is limited and the design strategy furnishes inhibitors with poor or modest binding affinities. The approach is most successful when substrates have a large, motile hydrophobic group that binds at a plastic and/or capacious hydrophobic site. Potent inhibitors were developed for mandelate racemase, isoleucine epimerase, and α-methylacyl-CoA racemase using the SPA inhibitor design strategy, exhibiting binding affinities ranging from substrate-like to exceeding that of the substrate by 100-fold. This rational approach for designing inhibitors of racemases and epimerases having the appropriate active-site architectures is a useful strategy for furnishing compounds for drug development.
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Affiliation(s)
- Stephen L Bearne
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada; Department of Chemistry, Dalhousie University, Halifax, NS, Canada.
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Nagarajan K, Ibrahim B, Bawadikji A, Khaw KY, Tong WY, Leong CR, Ramanathan S, Tan WN. Characterization of Metabolites in an Endophytic Fungus Diaporthe fraxini via NMR-based Metabolomics and Cholinesterase Inhibitory Activity. APPL BIOCHEM MICRO+ 2023; 59:316-322. [DOI: 10.1134/s0003683823030134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 12/22/2022] [Accepted: 01/09/2023] [Indexed: 10/18/2023]
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Bearne SL, Hayden JA. Application of circular dichroism-based assays to racemases and epimerases: Recognition and catalysis of reactions of chiral substrates by mandelate racemase. Methods Enzymol 2023; 685:127-169. [PMID: 37245900 DOI: 10.1016/bs.mie.2023.03.014] [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] [Indexed: 05/30/2023]
Abstract
Racemases and epimerases have attracted much interest because of their astonishing ability to catalyze the rapid α-deprotonation of carbon acid substrates with high pKa values (∼13-30) leading to the formation of d-amino acids or various carbohydrate diastereomers that serve important roles in both normal physiology and pathology. Enzymatic assays to measure the initial rates of reactions catalyzed by these enzymes are discussed using mandelate racemase (MR) as an example. For MR, a convenient, rapid, and versatile circular dichroism (CD)-based assay has been used to determine the kinetic parameters accompanying the MR-catalyzed racemization of mandelate and alternative substrates. This direct, continuous assay permits real time monitoring of reaction progress, the rapid determination of initial velocities, and immediate recognition of anomalous behaviors. MR recognizes chiral substrates primarily through interactions of the phenyl ring of (R)- or (S)-mandelate with the hydrophobic R- or S-pocket at the active site, respectively. During catalysis, the carboxylate and α-hydroxyl groups of the substrate remain fixed in place through interactions with the Mg2+ ion and multiple H-bonding interactions, while the phenyl ring moves between the R- and S-pockets. The minimal requirements for the substrate appear to be the presence of a glycolate or glycolamide moiety, and a hydrophobic group of limited size that can stabilize the carbanionic intermediate through resonance or strong inductive effects. Similar CD-based assays may be applied to determine the activity of other racemases or epimerases with proper consideration of the molar ellipticity, wavelength, overall absorbance of the sample, and the light pathlength.
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Affiliation(s)
- Stephen L Bearne
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada; Department of Chemistry, Dalhousie University, Halifax, NS, Canada.
| | - Joshua A Hayden
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
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High-level expression of an acetaldehyde dehydrogenase from Lactiplantibacillus plantarum and preliminary evaluation of its potential as a functional food additive. ELECTRON J BIOTECHN 2023. [DOI: 10.1016/j.ejbt.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023] Open
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Yuan S, Xu C, Jin M, Xian M, Liu W. Synergistic improvement of cinnamylamine production by metabolic regulation. J Biol Eng 2023; 17:14. [PMID: 36823535 PMCID: PMC9948449 DOI: 10.1186/s13036-023-00334-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 02/15/2023] [Indexed: 02/25/2023] Open
Abstract
BACKGROUND Aromatic primary amines (APAs) are key intermediates in the chemical industry with numerous applications. Efficient and mild biocatalytic synthesis is an excellent complement to traditional chemical synthesis. Our lab previously reported a whole-cell catalytic system for the synthesis of APAs catalyzed by carboxylic acid reductase from Neurospora crassa (ncCAR) and ω-transaminase from Ochrobactrum anthropi (OATA). However, the accumulation of toxic intermediates (aromatic aldehydes) during biocatalytic synthesis affected yields of APAs due to metabolic imbalance. RESULTS In this work, the biocatalytic synthesis of APAs (taking cinnamylamine as an example) was metabolically regulated by the overexpression or knockout of five native global transcription factors (TFs), the overexpression of eight native resistance genes, and optimization of promoters. Transcriptome analysis showed that knockout of the TF arcA increased the fluxes of NADPH and ATP in E. coli, while the rate of pyruvate metabolism was accelerated. In addition, the genes related to stress and detoxification were upregulated with the overexpression of resistance gene marA, which reduced the NADPH level in E. coli. Then, the expression level of soluble OATA increased by promoter optimization. Overall, arcA and marA could regulate the catalytic rate of NADPH- dependent ncCAR, while arcA and optimized promoter could regulate the catalytic rate of OATA. Lastly, the cinnamylamine yield of the best metabolically engineered strain S020 was increased to 90% (9 mM, 1.2 g/L), and the accumulation of cinnamaldehyde was below 0.9 mM. This work reported the highest production of cinnamylamine by biocatalytic synthesis. CONCLUSION This regulatory process provides a common strategy for regulating the biocatalytic synthesis of other APAs. Being entirely biocatalytic, our one-pot procedure provides considerable advantages in terms of environmental and safety impacts over reported chemical methods.
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Affiliation(s)
- Shan Yuan
- grid.458500.c0000 0004 1806 7609CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao, 266101 Shandong P.R. China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, Beijing, P.R. China
| | - Chao Xu
- grid.458500.c0000 0004 1806 7609CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao, 266101 Shandong P.R. China
| | - Miaomiao Jin
- grid.458500.c0000 0004 1806 7609CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao, 266101 Shandong P.R. China
| | - Mo Xian
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao, 266101, Shandong, P.R. China.
| | - Wei Liu
- CAS Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao, 266101, Shandong, P.R. China.
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He JJ, Liu XX, Li Y, Wang Z, Shi HL, Kan YC, Yao LG, Tang CD. High level expression of nicotinamide nucleoside kinase from Saccharomyces cerevisiae and its purification and immobilization by one-step method. Front Bioeng Biotechnol 2023; 11:1134152. [PMID: 36873348 PMCID: PMC9975500 DOI: 10.3389/fbioe.2023.1134152] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 02/06/2023] [Indexed: 02/17/2023] Open
Abstract
Nicotinamide riboside kinase (NRK) plays an important role in the synthesis of β -nicotinamide nucleotide (NMN). NMN is a key intermediate of NAD+ synthesis, and it actually contribute to the well-being of our health. In this study, gene mining technology was used to clone nicotinamide nucleoside kinase gene fragments from S. cerevisiae, and the ScNRK1 was achieved a high level of soluble expression in E. coli BL21. Then, the reScNRK1 was immobilized by metal affinity label to optimize the enzyme performance. The results showed that the enzyme activity in the fermentation broth was 14.75 IU/mL, and the specific enzyme activity after purification was 2252.59 IU/mg. After immobilization, the optimum temperature of the immobilized enzyme was increased by 10°C compared with the free enzyme, and the temperature stability was improved with little change in pH. Moreover, the activity of the immobilized enzyme remained above 80% after four cycles of immobilized reScNRK1, which makes the enzyme more advantageous in the enzymatic synthesis of NMN.
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Affiliation(s)
- Jian-Ju He
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Xin-Xin Liu
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Ying Li
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Zhe Wang
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Hong-Ling Shi
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Yun-Chao Kan
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China
| | - Lun-Guang Yao
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Cun-Duo Tang
- Henan Provincial Key Laboratory of Funiu Mountain Insect Biology and Henan Provincal Engineering and Technology Center of Health Products for Livestock and Poultry, Nanyang Normal University, Nanyang, China.,College of Life Science and Agricultural Engineering, Nanyang Normal University, Nanyang, China
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Salwan R, Sharma V, Das S. Phylogenetic and Structural Analysis of Bacterial Nitrilases for the Biodegradation of Nitrile Compounds. Curr Protein Pept Sci 2022; 23:874-882. [PMID: 36154580 DOI: 10.2174/1389203723666220921154409] [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: 02/20/2022] [Revised: 04/05/2022] [Accepted: 04/12/2022] [Indexed: 01/20/2023]
Abstract
BACKGROUND Microbial nitrilases play a vital role in the biodegradation of nitrilecontaining pollutants, effluent treatments in chemical and textile industries, and the biosynthesis of Indole-3-acetic acid (IAA) from tryptophan in plants. However, the lack of structural information limits the correlation between its activity and substrate specificity. METHODS The present study involves the genome mining of bacteria for the distribution and diversity of nitrilases, their phylogenetic analysis and structural characterization for motifs/ domains, followed by interaction with substrates. RESULTS Here, we mined the bacterial genomes for nitrilases and correlated their functions to hypothetical, uncharacterized, or putative ones. The comparative genomics revealed four AcNit, As7Nit, Cn5Nit and Cn9Nit predicted nitrilases encoding genes as uncharacterized subgroups of the nitrilase superfamily. The annotation of these nitrilases encoding genes revealed relatedness with nitrilase hydratases and cyanoalanine hydratases. At the proteomics level, the motif analysis of these protein sequences predicted a single motif of 20-28 aa, with glutamate (E), lysine (K) and cysteine (C) residues as a part of catalytic triad along with several other residues at the active site. The structural analysis of the nitrilases revealed geometrical and close conformation in the form of α-helices and β-sheets arranged in a sandwich structure. The catalytic residues constituted the substrate binding pocket and exhibited the broad nitrile substrate spectra for aromatic and aliphatic nitriles-containing compounds. The aromatic amino acid residues Y159 in the active site were predicted to be responsible for substrate specificity. The substitution of non-aromatic alanine residue in place of Y159 completely disrupted the catalytic activity for indole-3-acetonitrile (IAN). CONCLUSION The present study reports genome mining and simulation of structure-function relationship for uncharacterized bacterial nitrilases and their role in the biodegradation of pollutants and xenobiotics, which could be of applications in different industrial sectors.
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Affiliation(s)
- Richa Salwan
- College of Horticulture and Forestry (Dr. YS Parmar University of Horticulture and Forestry), Neri, Hamirpur (HP)- 177 001, India
| | - Vivek Sharma
- University Centre for Research and Development, Chandigarh University (PB)-140413, India
| | - Surajit Das
- Department of Life Science, Laboratory of Environmental Microbiology and Ecology (LEnME), National Institute of Technology Rourkela, Rourkela- 769 008, Odisha, India
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12
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Tang CD, Zhang X, Shi HL, Liu XX, Wang HY, Lu YF, Zhang SP, Kan YC, Yao LG. Improving catalytic activity of Lactobacillus harbinensis -mandelate dehydrogenase toward -o-chloromandelic acid by laboratory evolution. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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13
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Self-sufficient whole-cell biocatalysis for 3-(aminomethyl) pyridine synthesis. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Amrutha M, Nampoothiri KM. In silico analysis of nitrilase-3 protein from Corynebacterium glutamicum for bioremediation of nitrile herbicides. J Genet Eng Biotechnol 2022; 20:51. [PMID: 35348933 PMCID: PMC8964915 DOI: 10.1186/s43141-022-00332-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 03/09/2022] [Indexed: 01/01/2023]
Abstract
Background The nitrile compounds are produced either naturally or synthetically and are highly used in many manufacturing industries such as pharmaceuticals, pesticides, chemicals, and polymers. However, the extensive use and accumulation of these nitrile compounds have caused severe environmental pollution. Nitrilated herbicides are one such toxic substance that will persist in the soil for a long time. Therefore, effective measures must be taken to avoid its pollution to the environment. A variety of nitrile-converting bacterial species have the ability to convert these toxic substances into less toxic ones by using enzymatic processes. Among the bacterial groups, actinobacteria family members show good degradation capacity on these pollutants. The soil-dwelling Gram-positive industrial microbe Corynebacterium glutamicum is one such family member and its nitrile-degradation pathway is not well studied yet. In order to understand the effectiveness of using C. glutamicum for the degradation of such nitrile herbicides, an in silico approach has been done. In this perspective, this work focus on the structural analysis and molecular docking studies of C. glutamicum with nitrilated herbicides such as dichlobenil, bromoxynil, and chloroxynil. Results The bioinformatics analysis using different tools and software helped to confirm that the genome of C. glutamicum ATCC 13032 species have genes (cg 3093) codes for carbon-nitrogen hydrolase enzyme, which specifically act on non-peptide bond present in the nitrile compounds. The conserved domain analysis indicated that this protein sequence was nitrilase-3 and comes under the nitrilase superfamily. The multiple sequence alignment analysis confirmed that the conserved catalytic triad residues were 40E, 115K, and 151C, and the existence of nitrilase-3 protein in the genome of Corynebacterium sp. was evaluated by a phylogenetic tree. The analysis of physico-chemical properties revealed that alanine is the most abounded amino acid (10.20%) in the nitrilase-3 protein, and these properties influence the substrate specificity of aliphatic and aromatic nitrile compounds. The homology modelled protein showed better affinity towards nitrile herbicides such as 2,6-dichlorobenzamide (BAM) and 3,5-dichloro-4-hydroxy-benzamide (CIAM) with the affinity value of − 5.8 and − 5.7 kcal/mol respectively. Conclusions The in silico studies manifested that C. glutamicum ATCC 13032 is one of the promising strains for the bioremediation of nitrilated herbicides contaminated soil.
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Affiliation(s)
- M Amrutha
- Microbial Processes and Technology Division (MPTD), CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, 695019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - K Madhavan Nampoothiri
- Microbial Processes and Technology Division (MPTD), CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Trivandrum, Kerala, 695019, India. .,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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15
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Wang Q, Geng S, Wang L, Wen Z, Sun X, Huang H. Bacterial mandelic acid degradation pathway and its application in biotechnology. J Appl Microbiol 2022; 133:273-286. [PMID: 35294082 DOI: 10.1111/jam.15529] [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: 05/06/2021] [Revised: 12/22/2021] [Accepted: 03/09/2022] [Indexed: 11/28/2022]
Abstract
Mandelic acid and its derivatives are an important class of chemical synthetic blocks, which is widely used in drug synthesis and stereochemistry research. In nature, mandelic acid degradation pathway has been widely identified and analyzed as a representative pathway of aromatic compounds degradation. The most studied mandelic acid degradation pathway from Pseudomonas putida consists of mandelate racemase, S-mandelate dehydrogenase, benzoylformate decarboxylase, benzaldehyde dehydrogenase and downstream benzoic acid degradation pathways. Because of the ability to catalyze various reactions of aromatic substrates, pathway enzymes have been widely used in biocatalysis, kinetic resolution, chiral compounds synthesis or construction of new metabolic pathways. In this paper, the physiological significance and the existing range of the mandelic acid degradation pathway were introduced first. Then each of the enzymes in the pathway is reviewed one by one, including the researches on enzymatic properties and the applications in biotechnology as well as efforts that have been made to modify the substrate specificity or improving catalytic activity by enzyme engineering to adapt different applications. The composition of the important metabolic pathway of bacterial mandelic acid degradation pathway as well as the researches and applications of pathway enzymes is summarized in this review for the first time.
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Affiliation(s)
- Qingzhuo Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China
| | - Shanshan Geng
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China
| | - Lingru Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China
| | - Zhiqiang Wen
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China
| | - Xiaoman Sun
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China
| | - He Huang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 2# Xuelin Road, Qixia District, Nanjing, People's Republic of China.,College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing, People's Republic of China
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16
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Yang LL, Shi HL, Liu F, Wang Z, Chen KL, Chen WS, Niu XR, Kan YC, Yao LG, Tang CD. Gene cloning of a highly active phytase from Lactobacillus plantarum and further improving its catalytic activity and thermostability through protein engineering. Enzyme Microb Technol 2022; 156:109997. [DOI: 10.1016/j.enzmictec.2022.109997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/24/2022] [Accepted: 01/26/2022] [Indexed: 01/21/2023]
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17
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Directed evolution of formate dehydrogenase and its application in the biosynthesis of L-phenylglycine from phenylglyoxylic acid. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Jia YY, Xie YL, Yang LL, Shi HL, Lu YF, Zhang SP, Tang CD, Yao LG, Kan YC. Expression of Novel L-Leucine Dehydrogenase and High-Level Production of L-Tert-Leucine Catalyzed by Engineered Escherichia coli. Front Bioeng Biotechnol 2021; 9:655522. [PMID: 33859982 PMCID: PMC8042219 DOI: 10.3389/fbioe.2021.655522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 03/05/2021] [Indexed: 11/29/2022] Open
Abstract
Leucine dehydrogenase (LDH) is a NAD+-dependent oxidoreductase, which can selectively catalyze α-keto acids to obtain α-amino acids and their derivatives. It plays a key role in the biosynthesis of L-tert-leucine (L-Tle). As a non-naturally chiral amino acid, L-Tle can be used as an animal feed additive, nutrition fortifier, which is a perspective and important building block in the pharmaceutical, cosmetic, and food additive industry. In this study, four hypothetical leucine dehydrogenases were discovered by using genome mining technology, using the highly active leucine dehydrogenase LsLeuDH as a probe. These four leucine dehydrogenases were expressed in Escherichia coli BL21(DE3), respectively, and purified to homogeneity and characterized. Compared with the other enzymes, the specific activity of PfLeuDH also shows stronger advantage. In addition, the highly selective biosynthesis of L-Tle from trimethylpyruvic acid (TMP) was successfully carried out by whole-cell catalysis using engineered E. coli cells as biocatalyst, which can efficiently coexpress leucine dehydrogenase and formate dehydrogenase. One hundred-millimolar TMP was catalyzed for 25 h, and the yield and space-time yield of L-Tle reached 87.38% (e.e. >99.99%) and 10.90 g L–1 day–1. In short, this research has initially achieved the biosynthesis of L-Tle, laying a solid foundation for the realization of low-cost and large-scale biosynthesis of L-Tle.
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Affiliation(s)
- Yuan-Yuan Jia
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Yu-Li Xie
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Lu-Lu Yang
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Hong-Ling Shi
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Yun-Feng Lu
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Si-Pu Zhang
- Henan Academy of Agricultural Sciences, Zhengzhou, China
| | - Cun-Duo Tang
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Lun-Guang Yao
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China.,School of Life Sciences and Agricultural Engineering, Nanyang Normal University, Nanyang, China
| | - Yun-Chao Kan
- Henan Provincial Engineering Laboratory of Insect Bio-reactor, Henan Key Laboratory of Ecological Security for Water Source Region of Mid-line of South-to-North, Nanyang Normal University, Nanyang, China
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19
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Wang HY, Xie YL, Shi X, Shi HL, Xu JH, Tang CD, Yao LG, Kan YC. Directed evolution of a D-mandelate dehydrogenase toward D-o-chloromandelic acid and insight into the molecular basis for its catalytic performance. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Shen JD, Cai X, Liu ZQ, Zheng YG. Nitrilase: a promising biocatalyst in industrial applications for green chemistry. Crit Rev Biotechnol 2020; 41:72-93. [PMID: 33045860 DOI: 10.1080/07388551.2020.1827367] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Nitrilases are widely distributed in nature and are able to hydrolyze nitriles into their corresponding carboxylic acids and ammonia. In industry, nitrilases have been used as green biocatalysts for the production of high value-added products. To date, biocatalysts are considered to be important alternatives to chemical catalysts due to increasing environmental problems and resource scarcity. This review provides an overview of recent advances of nitrilases in aspects of distribution, enzyme screening, molecular structure and catalytic mechanism, protein engineering, and their potential applications in industry.
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Affiliation(s)
- Ji-Dong Shen
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China.,Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, P.R. China
| | - Xue Cai
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China.,Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, P.R. China
| | - Zhi-Qiang Liu
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China.,Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, P.R. China
| | - Yu-Guo Zheng
- Key Laboratory of Bioorganic Synthesis of Zhejiang Province, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, P. R. China.,Engineering Research Center of Bioconversion and Biopurification of Ministry of Education, Zhejiang University of Technology, Hangzhou, P.R. China
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21
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Efficient expression of novel glutamate decarboxylases and high level production of γ-aminobutyric acid catalyzed by engineered Escherichia coli. Int J Biol Macromol 2020; 160:372-379. [DOI: 10.1016/j.ijbiomac.2020.05.195] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 11/20/2022]
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22
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Tang CD, Shi HL, Jia YY, Li X, Wang LF, Xu JH, Yao LG, Kan YC. High level and enantioselective production of L-phenylglycine from racemic mandelic acid by engineered Escherichia coli using response surface methodology. Enzyme Microb Technol 2020; 136:109513. [PMID: 32331718 DOI: 10.1016/j.enzmictec.2020.109513] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 01/11/2020] [Accepted: 01/17/2020] [Indexed: 12/12/2022]
Abstract
L-Phenylglycine (L-PHG) is a member of unnatural amino acids, and becoming more and more important as intermediate for pharmaceuticals, food additives and agrochemicals. However, the existing synthetic methods for L-PHG mainly rely on toxic cyanide chemistry and multistep processes. To provide green, safe and high enantioselective alternatives, we envisaged cascade biocatalysis for the one-pot synthesis of L-PHG from racemic mandelic acid. A engineered E. coli strain was established to co-express mandelate racemase, D-mandelate dehydrogenase and L-leucine dehydrogenase and catalyze a 3-step reaction in one pot, enantioselectively transforming racemic mandelic acid to give L-PHG (e.e. >99 %). After the conditions for biosynthesis of L-PHG optimized by response surface methodology, the yield and space-time yield of L-PHG can reach 87.89 % and 79.70 g·L-1·d-1, which was obviously improved. The high-yielding and enantioselective synthetic methods use cheap and green reagents, and E. coli whole-cell catalysts, thus providing green and useful alternative methods for manufacturing L-PHG.
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Affiliation(s)
- Cun-Duo Tang
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Hong-Ling Shi
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Yuan-Yuan Jia
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Xiang Li
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China
| | - Lin-Feng Wang
- State Key Laboratory of Automotive Biofuel Technology, 1 Tianguan Avenue, Nanyang, Henan, 473000, People's Republic of China
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
| | - Lun-Guang Yao
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China.
| | - Yun-Chao Kan
- Henan Provincial Engineering Laboratory of Insect Bio-Reactor and Henan Key Laboratory of Ecological Security for Water Source Region of Mid-Line of South-to-North, Nanyang Normal University, 1638 Wolong Road, Nanyang, Henan, 473061, People's Republic of China.
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23
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Wang Y, Jia Z, Jiang J, Mao X, Pan X, Wu J. Highly Regioselective Ring-Opening Polymerization of Cyclic Diester for Alternating Sequence-Controlled Copolymer Synthesis of Mandelic Acid and Glycolic Acid. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01515] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yaru Wang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Zhaowei Jia
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jinxing Jiang
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaoyang Mao
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaobo Pan
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Jincai Wu
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
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Li A, Yuchi Q, Li X, Pang W, Li B, Xue F, Zhang L. Discovery of a novel ortho-haloacetophenones-specific carbonyl reductase from Bacillus aryabhattai and insight into the molecular basis for its catalytic performance. Int J Biol Macromol 2019; 138:781-790. [PMID: 31351953 DOI: 10.1016/j.ijbiomac.2019.07.153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 12/25/2022]
Abstract
To exploit robust biocatalysts for chiral 1-(2-halophenyl)ethanols synthesis, an ortho-haloacetophenones-specific carbonyl reductase (BaSDR1) gene from Bacillus aryabhattai was cloned and expressed in Escherichia coli. The impressive properties regarding BaSDR1 application include preference for NADH as coenzyme, noticeable tolerance against high cosubstrate concentration, and remarkable catalytic performance over a broad pH range from 5.0 to 10.0. The optimal temperature was 35 °C, with a half-life of 3.1 h at 35 °C and 0.75 h at 45 °C, respectively. Notably, BaSDR1 displayed excellent catalytic performance toward various ortho-haloacetophenones, providing chiral 1-(2-halophenyl)ethanols with 99% ee for all the substrates tested. Most importantly, the docking results indicated that the enzyme-substrate interactions and the steric hindrance of halogen atoms act in a push-pull manner in regulating enzyme catalytic ability. These results provide valuable clues for the structure-function relationships of BaSDR1 and the role of halogen groups in catalytic performance, and offer important reference for protein engineering and mining of functional compounds.
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Affiliation(s)
- Aipeng Li
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China; Research & Development Institute of Northwestern Polytechnical University in Shenzhen, 518057 Shenzhen, China
| | - Qingxiao Yuchi
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China
| | - Xue Li
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China
| | - Wei Pang
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China
| | - Bin Li
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China
| | - Feng Xue
- School of Marine and Bioengineering, Yancheng Institute of Technology, 224051 Yancheng, China.
| | - Lianbing Zhang
- School of Life Sciences, Northwestern Polytechnical University, 710072 Xi'an, China.
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