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Liu J, Zhang Q, Liang X, Zhang R, Huang X, Zhang S, Xie Z, Gao W, Liu H. Improving glucose oxidase catalysis in Aspergillus niger via Vitreoscilla hemoglobin fusion protein. Appl Microbiol Biotechnol 2024; 108:48. [PMID: 38183481 DOI: 10.1007/s00253-023-12931-4] [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: 08/06/2023] [Revised: 10/17/2023] [Accepted: 10/27/2023] [Indexed: 01/08/2024]
Abstract
Oxygen is crucial for converting glucose to gluconic acid catalyzed by glucose oxidase (Gox). However, industrial gluconic acid production faces oxygen supply limitations. To enhance Gox efficiency, Vitreoscilla hemoglobin (VHb) has been considered as an efficient oxygen transfer carrier. This study identified GoxA, a specific isoform of Gox in the industrial gluconic acid-producing strain of Aspergillus niger. Various forms of VHb expression in A. niger were tested to improve GoxA's catalytic efficiency. Surprisingly, the expression of free VHb, both intracellularly and extracellularly, did not promote gluconic acid production during shake flask fermentation. Then, five fusion proteins were constructed by linking Gox and VHb using various methods. Among these, VHb-GS1-GoxA, where VHb's C-terminus connected to GoxA's N-terminus via the flexible linker GS1, demonstrated a significantly higher Kcat/Km value (96% higher) than GoxA. Unfortunately, the expression of VHb-GS1-GoxA in A. niger was limited, resulting in a low gluconic acid production of 3.0 g/L. To overcome the low expression problem, single- and dual-strain systems were designed with tools of SpyCatcher/SpyTag and SnoopCatcher/SnoopTag. In these systems, Gox and VHb were separately expressed and then self-assembled into complex proteins. Impressively, the single-strain system outperformed the GoxA overexpression strain S1971, resulting in 23% and 9% higher gluconic acid production under 0.6 vvm and 1.2 vvm aeration conditions in the bioreactor fermentation, respectively. The successful construction of Gox and VHb fusion or complex proteins, as proposed in this study, presents promising approaches to enhance Gox catalytic efficiency and lower aerodynamic costs in gluconic acid production. KEY POINTS: • Overexpressing free VHb in A. niger did not improve the catalytic efficiency of Gox • The VHb-GS1-GoxA showed an increased Kcat/Km value by 96% than GoxA • The single-strain system worked better in the gluconic acid bioreactor fermentation.
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Affiliation(s)
- Jiao Liu
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Qian Zhang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Xingying Liang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Rong Zhang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Xiaojie Huang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Shanshan Zhang
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Zhoujie Xie
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Weixia Gao
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China
| | - Hao Liu
- MOE Key Laboratory of Industrial Fermentation Microbiology, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, 300457, China.
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin University of Science & Technology, Tianjin, 300457, China.
- National Technology Innovation Center of Synthetic Biology, Tianjin, 300308, People's Republic of 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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3
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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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4
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Wang Q, Zheng H, Tao R, Li Q, Jiang Y, Yang S. Vitreoscilla hemoglobin enhances the catalytic performance of industrial oxidases in vitro. Appl Microbiol Biotechnol 2022; 106:3657-3667. [PMID: 35579683 DOI: 10.1007/s00253-022-11974-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 04/23/2022] [Accepted: 04/27/2022] [Indexed: 11/25/2022]
Abstract
Oxidases are a group of oxidoreductases and need molecular oxygen in the catalytic process. Vitreoscilla hemoglobin (VHb) can improve the growth and productivity of host cells under hypoxic conditions, rendering it attractive for industrial application. In this work, we demonstrated the addition of immobilized VHb increased the catalytic activity of immobilized D-amino acid oxidase of Trigonopsis variabilis by two-fold when catalyzing cephalosporin C under oxygen-limited conditions. A similar increase of activities was observed in glucose oxidase, alcohol oxidase, and p-hydroxymandelate synthase by adding free VHb or immobilized VHb under hypoxic conditions. When L-glutamate oxidase was used to catalyze L-glutamate to produce α-ketoglutarate, the yield increased from 80.6 to 96.9% by fusing VHb with L-glutamate oxidase. Results demonstrated that the addition of free VHb, immobilized VHb, or fused VHb could increase the catalytic efficiency of oxidases, which was considered by increasing the concentration of the microenvironmental oxygen. Thus, VHb may become a potential additive agent to promote the efficiency of oxidases on industrial scale . KEY POINTS: • First time confirmation of facilitation of VHb on several industrial oxidases in vitro • VHb functions under hypoxic conditions rather than oxygen-enriched conditions • VHb functions in vitro in the form of free, immobilized protein and fusion enzyme.
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Affiliation(s)
- Qingzhuo Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210000, China.,CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China
| | - Huabao Zheng
- State Key Laboratory of Subtropical Silviculture, College of Environmental and Resource Sciences, Zhejiang A & F University, Hangzhou, 311300, China
| | - Rongsheng Tao
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Huzhou, 313000, China.,Huzhou Yisheng Biotechnology Co., Ltd, Huzhou, 313000, China
| | - Qi Li
- College of Life Sciences, Sichuan Normal University, Chengdu, 610101, China
| | - Yu Jiang
- Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Huzhou, 313000, China. .,Shanghai Taoyusheng Biotechnology Co., Ltd, Shanghai, 200000, China.
| | - Sheng Yang
- CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 200032, China. .,Huzhou Center of Industrial Biotechnology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Huzhou, 313000, China.
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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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6
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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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7
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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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8
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Tang CD, Shi HL, Xu JH, Jiao ZJ, Liu F, Ding PJ, Shi HF, Yao LG, Kan YC. Biosynthesis of Phenylglyoxylic Acid by LhDMDH, a Novel d-Mandelate Dehydrogenase with High Catalytic Activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:2805-2811. [PMID: 29460618 DOI: 10.1021/acs.jafc.7b05835] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
d-Mandelate dehydrogenase (DMDH) has the potential to convert d-mandelic acid to phenylglyoxylic acid (PGA), which is a key building block in the field of chemical synthesis and is widely used to synthesize pharmaceutical intermediates or food additives. A novel NAD+-dependent d-mandelate dehydrogenase was cloned from Lactobacillus harbinensi (LhDMDH) by genome mining and expressed in Escherichia coli BL21. After being purified to homogeneity, the oxidation activity of LhDMDH toward d-mandelic acid was approximately 1200 U·mg-1, which was close to four times the activity of the probe. Meanwhile, the kcat/ Km value of LhDMDH was 28.80 S-1·mM-1, which was distinctly higher than the probe. By coculturing two E. coli strains expressing LhDMDH and LcLDH, we developed a system for the efficient synthesis of PGA, achieving a 60% theoretical yield and 99% purity without adding coenzyme or cosubstrate. Our data supports the implementation of a promising strategy for the chiral resolution of racemic mandelic acid and the biosynthesis of PGA.
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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
- State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai 200237 , 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
| | - Jian-He Xu
- State Key Laboratory of Bioreactor Engineering , East China University of Science and Technology , Shanghai 200237 , People's Republic of China
| | - Zhu-Jin Jiao
- 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
| | - Fei Liu
- 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
| | - Peng-Ju Ding
- 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-Fei 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
| | - 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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Molla G, Melis R, Pollegioni L. Breaking the mirror: l-Amino acid deaminase, a novel stereoselective biocatalyst. Biotechnol Adv 2017; 35:657-668. [DOI: 10.1016/j.biotechadv.2017.07.011] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 07/04/2017] [Accepted: 07/30/2017] [Indexed: 12/27/2022]
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10
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Zheng J, Yang T, Zhou J, Xu M, Zhang X, Rao Z, Yang S. Efficient production of d-amino acid oxidase in Escherichia coli by a trade-off between its expression and biomass using N-terminal modification. BIORESOURCE TECHNOLOGY 2017; 243:716-723. [PMID: 28711799 DOI: 10.1016/j.biortech.2017.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 07/01/2017] [Accepted: 07/03/2017] [Indexed: 06/07/2023]
Abstract
Native d-amino acid oxidase (DAAO) that is expressed mostly as inclusion body and its toxicity for E. coli hamper efficient heterologous expression. In this study, the soluble expression of DAAO from Rhodosporidium toruloides (RtDAAO) was improved in E. coli through N-terminal modification, but the cell biomass was decreased. Then a trade-off between DAAO expression and biomass was achieved to obtain the highest volumetric activity of DAAO through regulated the number of N-terminus histidine residues. When variant 2H3G was fused with three N-terminus histidine residues, the volumetric activity was increased by 3.1 times and the biomass was not significant change compared with the wild type. Finally, the N-terminus disordered region of RtDAAO (HSQK) was replaced with HHHG and the variant enzyme activity reached 80.7U/mL (with a 40 percent of inactive DAAO reduced) in a 7.5L fermenter in 24h.
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Affiliation(s)
- Junxian Zheng
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Taowei Yang
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Junping Zhou
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Meijuan Xu
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Xian Zhang
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
| | - Zhiming Rao
- The Key Laboratory of Industrial Biotechnology of Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China.
| | - Shangtian Yang
- Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH 43210, USA
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Du K, Sun J, Song X, Song C, Feng W. Enhancement of the solubility and stability of D-amino acid oxidase by fusion to an elastin like polypeptide. J Biotechnol 2015. [PMID: 26216181 DOI: 10.1016/j.jbiotec.2015.07.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
An elastin-like polypeptide (ELP) was fused to D-amino acid oxidases (DAAO). ELP-DAAO exhibited a better solubility in aqueous solutions than DAAO, and its enzymatic activity is about 1.6 times that of DAAO. The stability of the proteins was investigated by interacting with urea at various concentrations. The circular dichroism and fluorescence spectra were measured. The results demonstrated that that ELP-DAAO exhibited a much better stability than DAAO, and ELP-DAAO has retained the α-helix content with a high percentage even at a high urea concentration. The results of this work have demonstrated that the ELP tag can be utilized to purify DAAO, in the meantime the solubility and stability of the enzyme are improved.
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Affiliation(s)
- Kun Du
- Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jian Sun
- Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaoqiang Song
- Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Cuidan Song
- Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wei Feng
- Department of Biochemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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High-level soluble and functional expression of Trigonopsis variabilis D-amino acid oxidase in Escherichia coli. Bioprocess Biosyst Eng 2014; 37:1517-26. [PMID: 24425540 DOI: 10.1007/s00449-013-1123-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/30/2013] [Indexed: 10/25/2022]
Abstract
D-Amino acid oxidase is an important biocatalyst used in a variety of fields, and its economically justified level recombinant expression in Escherichia coli has not been established. To accomplish this, after a single Phe54Tyr substitution, fusion proteins of D-amino acid oxidase from Trigonopsis variabilis (TvDAO) with 6 × His-tags were constructed and expressed in E. coli. The effects of his-tags fusing position were revealed. Significant increase in holoenzyme percent and protein solubility made N-terminus tagged TvDAO (termed NHDAO) a suitable choice for TvDAO production. However, reduced cell growth and protein production rates were also observed for the NHDAO bearing strains. To optimize the performance of NHDAO production, changes of culture medium were tested. Finally, a production of 140 U/mL or 3.48 g active enzyme per liter which accounted for 41.4 % of the total protein, and a specific activity of 16.68 U/mg for the crude extract, were achieved in a 3.7 L fermenter in 28.5 h. This indicated a possibility for functional and economical TvDAO expression in E. coli to meet the industrial need.
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Wang Y, Yu H, Song W, An M, Zhang J, Luo H, Shen Z. Overexpression of synthesized cephalosporin C acylase containing mutations in the substrate transport tunnel. J Biosci Bioeng 2012; 113:36-41. [DOI: 10.1016/j.jbiosc.2011.08.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 08/05/2011] [Accepted: 08/30/2011] [Indexed: 10/17/2022]
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New biotech applications from evolved D-amino acid oxidases. Trends Biotechnol 2011; 29:276-83. [PMID: 21397351 DOI: 10.1016/j.tibtech.2011.01.010] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Revised: 01/24/2011] [Accepted: 01/27/2011] [Indexed: 11/20/2022]
Abstract
D-Amino acid oxidase (DAAO) is a well-known flavoenzyme that catalyzes the oxygen-dependent oxidative deamination of amino acid D-isomers with absolute stereospecificity, which results in α-keto acids, ammonia and hydrogen peroxide. Recently, the extraordinary functional plasticity of DAAO has become evident; in turn, boosting research on this flavoprotein. Protein engineering has allowed for a redesign of DAAO substrate specificity, oxygen affinity, cofactor binding, stability, and oligomeric state. We review recent developments in utilizing DAAO, including as a biocatalyst for resolving racemic amino acid mixtures, as a tool for biosensing, and as a new mechanism of herbicide resistance. Perspectives for future biotechnological applications of this oxidative biocatalyst are also outlined.
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Kopf J, Hormigo D, García JL, Acebal C, de la Mata I, Arroyo M. Inhibition of Recombinant D-Amino Acid Oxidase from Trigonopsis variabilisby Salts. Enzyme Res 2011; 2011:158541. [PMID: 21423676 PMCID: PMC3057018 DOI: 10.4061/2011/158541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Accepted: 01/01/2011] [Indexed: 11/20/2022] Open
Abstract
Inhibition of recombinant D-amino acid oxidase fromTrigonopsis variabilis(TvDAAO) activity in the presence of different sodium salts and potassium chloride is reported. A competitive inhibition pattern by sodium chloride was observed, and an inhibition constant value ofKi=85 mM was calculated. Direct connection of NaCl inhibition with FAD cofactor dissociation was confirmed by measuring the fluorescence of tryptophanyl residues of the holoenzyme.
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Affiliation(s)
- Jessica Kopf
- Departamento de Bioquímica y Biología Molecular I, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, José Antonio Novais 2, 28040 Madrid, Spain
| | - Daniel Hormigo
- Departamento de Bioquímica y Biología Molecular I, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, José Antonio Novais 2, 28040 Madrid, Spain
| | - José Luis García
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas (CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain
| | - Carmen Acebal
- Departamento de Bioquímica y Biología Molecular I, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, José Antonio Novais 2, 28040 Madrid, Spain
| | - Isabel de la Mata
- Departamento de Bioquímica y Biología Molecular I, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, José Antonio Novais 2, 28040 Madrid, Spain
| | - Miguel Arroyo
- Departamento de Bioquímica y Biología Molecular I, Facultad de Ciencias Biológicas, Universidad Complutense de Madrid, José Antonio Novais 2, 28040 Madrid, Spain
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Frey AD, Shepherd M, Jokipii-Lukkari S, Häggman H, Kallio PT. The single-domain globin of Vitreoscilla: augmentation of aerobic metabolism for biotechnological applications. Adv Microb Physiol 2011; 58:81-139. [PMID: 21722792 DOI: 10.1016/b978-0-12-381043-4.00003-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Extensive studies have revealed that large-scale, high-cell density bioreactor cultivations have significant impact on metabolic networks of oxygen-requiring production organisms. Oxygen transfer problems associated with fluid dynamics and inefficient mixing efficiencies result in oxygen gradients, which lead to reduced performance of the bioprocess, decreased product yields, and increased production costs. These problems can be partially alleviated by improving bioreactor configuration and setting, but significant improvements have been achieved by metabolic engineering methods, especially by heterologously expressing Vitreoscilla hemoglobin (VHb). Vast numbers of studies have been accumulating during the past 20 years showing the applicability of VHb to improve growth and product yields in a variety of industrially significant prokaryotic and eukaryotic hosts. The global view on the metabolism of globin-expressing Escherichia coli cells depicts increased energy generation, higher oxygen uptake rates, and a decrease in fermentative by-product excretion. Transcriptome and metabolic flux analysis clearly demonstrate the multidimensional influence of heterologous VHb on the expression of stationary phase-specific genes and on the regulation of cellular metabolic networks. The exact biochemical mechanisms by which VHb is able to improve the oxygen-limited growth remain poorly understood. The suggested mechanisms propose either the delivery of oxygen to the respiratory chain or the detoxification of reactive nitrogen species for the protection of cytochrome activity. The expression of VHb in E. coli bioreactor cultures is likely to assist bacterial growth through providing an increase in available intracellular oxygen, although to fully understand the exact role of VHb in vivo, further analysis will be required.
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