1
|
Zhang B, Chi H, Shen J, Tao Y, Lu Z, Lu F, Zhu P. Improved catalytic performance and molecular insight for lipoxygenase from Enterovibrio norvegicus via directed evolution. Front Bioeng Biotechnol 2023; 11:1305582. [PMID: 38047284 PMCID: PMC10690365 DOI: 10.3389/fbioe.2023.1305582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/06/2023] [Indexed: 12/05/2023] Open
Abstract
Lipoxygenase (LOX) holds significant promise for food and pharmaceutical industries. However, albeit its application has been hampered by low catalytic activity and suboptimal thermostability. To address the drawbacks, a directed evolution strategy was explored to enhance the catalytic activity and thermostability of LOX from Enterovibrio norvegicus (EnLOX) for the first time. After two rounds of error-prone polymerase chain reaction (error-prone PCR) and one generations of sequential DNA shuffling, all of four different mutants showed a significant increase in the specific activity of EnLOX, ranging from 132.07 ± 9.34 to 330.17 ± 18.54 U/mg. Among these mutants, D95E/T99A/A121H/S142N/N444W/S613G (EAHNWG) exhibited the highest specific activity, which was 8.25-fold higher than the wild-type enzyme (WT). Meanwhile, the catalytic efficiency (K cat /K m) of EAHNWG was also improved, which was 13.61 ± 1.67 s-1 μM-1, in comparison to that of WT (4.83 ± 0.38 s-1 μM-1). In addition, mutant EAHNWG had a satisfied thermostability with the t 1/2,50 °C value of 6.44 ± 0.24 h, which was 0.4 h longer than that of the WT. Furthermore, the molecular dynamics simulation and structural analysis demonstrated that the reduction of hydrogen bonds number, the enhancement of hydrophobic interactions in the catalytic pocket, and the improvement of flexibility of the lid domain facilitated structural stability and the strength of substrate binding capacity for improved thermal stability and catalytic efficiency of mutant LOX after directed evolution. Overall, these results could provide the guidance for further enzymatic modification of LOX with high catalytic performance for industrial application.
Collapse
Affiliation(s)
| | | | | | | | | | - Fengxia Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| | - Ping Zhu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
| |
Collapse
|
2
|
Pang C, Liu S, Zhang G, Zhou J, Du G, Li J. Improving the catalytic efficiency of Pseudomonas aeruginosa lipoxygenase by semi-rational design. Enzyme Microb Technol 2023; 162:110120. [DOI: 10.1016/j.enzmictec.2022.110120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 08/30/2022] [Accepted: 09/01/2022] [Indexed: 10/14/2022]
|
3
|
Bacterial lipoxygenases: Biochemical characteristics, molecular structure and potential applications. Biotechnol Adv 2022; 61:108046. [DOI: 10.1016/j.biotechadv.2022.108046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/02/2022] [Accepted: 09/28/2022] [Indexed: 11/24/2022]
|
4
|
Pang C, Liu S, Zhang G, Zhou J, Du G, Li J. Enhancing extracellular production of lipoxygenase in Escherichia coli by signal peptides and autolysis system. Microb Cell Fact 2022; 21:42. [PMID: 35305645 PMCID: PMC8933919 DOI: 10.1186/s12934-022-01772-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 03/09/2022] [Indexed: 02/06/2023] Open
Abstract
Background Lipoxygenase (LOX) is a non-heme iron containing dioxygenase that is widely used to improve food quality and produce active drug intermediates and biodiesel. Escherichia coli is one of the most widely used host microorganisms for recombinant protein expression; however, its weak extracellular secretion ability precludes its effective production of recombinant proteins into the extracellular environment. To facilitate subsequent characterization and application of LOX, improving its secretion efficiency from E. coli is a major challenge that needs to be solved. Results Several strategies were adopted to improve the extracellular secretion of LOX based on the signal peptides and cell wall permeability of E. coli. Here, we studied the effect of signal peptides on LOX secretion, which increased the secretory capacity for LOX marginally. Although surfactants could increase the permeability of the cell membrane to promote LOX secretion, the extracellular LOX yield could not meet the requirements of industrialization production. Subsequently, an autolysis system was constructed in E. coli based on the bacteriophage lysis gene ΦX174-E to enhance the production of extracellular proteins. Thus, the extracellular production of LOX was achieved and the content of inclusion bodies in the cell was reduced by optimizing cell lysis conditions. The extracellular LOX yield reached 368 ± 1.4 U mL−1 in a 5-L bioreactor under optimized lysis conditions that is, an induction time and temperature, and arabinose concentration of 5 h, 25 °C, and 0.6 mM, respectively. Conclusions In this study, the different signal peptides and cell autolysis system were developed and characterized for extracellular LOX production in E. coli. Finally, the cell autolysis system presented a slight advantage on extracellular LOX yield, which also provides reference for other protein extracellular production. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-022-01772-x.
Collapse
|
5
|
Combinatorial strategy towards the efficient expression of lipoxygenase in Escherichia coli at elevated temperatures. Appl Microbiol Biotechnol 2020; 104:10047-10057. [PMID: 33037915 DOI: 10.1007/s00253-020-10941-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 08/31/2020] [Accepted: 10/04/2020] [Indexed: 02/07/2023]
Abstract
Lipoxygenases (LOXs) are a family of non-heme iron oxidoreductases, which catalyze the addition of oxygen into polyunsaturated fatty acids. They have applications in the food and medical industries. In most studies, the soluble expression of LOXs in microbes requires low temperature (< 20 °C), which increases the cost and fermentation time. Achievement of soluble expression in elevated temperatures (> 30 °C) would shorten the production phase, leading to cost-efficient industrial applications. In this study, a combinatorial strategy was used to enhance the expression of soluble LOXs, comprising plasmid stability systems plus optimized carbon source used for auto-induction expression. Plasmid stability analysis suggested that both active partition systems and plasmid-dependent systems were essential for plasmid stability. Among them, the parBCA in it resulted in the enzyme activity increasing by a factor of 2 (498 ± 13 units per gram dry cell weight (U/g-DCW) after 6-h induction). Furthermore, the optimized carbon source, composed of glucose, lactose, and glycerol, could be used as an auto-induction expression medium and effectively improve the total and soluble expression of LOX, which resulted in the soluble expression of LOX increased by 7 times. Finally, the soluble expression of LOX was 11 times higher with a combinatorial strategy that included both optimized plasmid partition and auto-induction medium. Our work provides a broad, generalizable, and combinatorial strategy for the efficient production of heterologous proteins at elevated temperatures in the E. coli system. KEY POINTS : • Soluble expression of lipoxygenase at 30 °C or higher temperatures is industrially beneficial. • Strategies comprise plasmid partition and optimized auto-induction medium with glucose, lactose, and glycerol as carbon source. • Combinatorial strategy further improved LOX soluble expression at 30 °C and 37 °C.
Collapse
|
6
|
Lu X, Chen J, Jiao L, Zhong L, Lu Z, Zhang C, Lu F. Improvement of the activity of l-asparaginase I improvement of the catalytic activity of l-asparaginase I from Bacillus megaterium H-1 by in vitro directed evolution. J Biosci Bioeng 2019; 128:683-689. [DOI: 10.1016/j.jbiosc.2019.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/17/2019] [Accepted: 06/04/2019] [Indexed: 10/26/2022]
|
7
|
Qian H, Zhang C, Lu Z, Xia B, Bie X, Zhao H, Lu F, Yang GY. Consensus design for improved thermostability of lipoxygenase from Anabaena sp. PCC 7120. BMC Biotechnol 2018; 18:57. [PMID: 30236091 PMCID: PMC6148764 DOI: 10.1186/s12896-018-0468-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/06/2018] [Indexed: 01/21/2023] Open
Abstract
Background Lipoxygenase (LOX) from Anabaena sp. PCC 7120 (Ana-rLOX) offers important applications in the food industry, especially for improving aroma and dough rheological properties. However, industrial applications of LOXs have been limited by their poor thermostability. Herein, we report a bioinformatics-based consensus concept approach for the engineering of thermostable Ana-rLOX. Results A series of mutations (N130D, G260A, S437T, N130D/G260Q, N130D/S437Y) showed higher thermostability and activity than the wild-type enzyme. Thus, N130D/G260Q exhibited a 6.6-fold increase in half-life and 2.45 °C increase in unfolding temperature; N130D/S437Y showed a 10 °C increase in optimal temperature. The secondary structure did not change much that contributed to improved thermostability were investigated in detail using circular dichroism. Homology modeling suggested that enhanced thermostability and specific activity may result from favorable hydrophobic interactions. Conclusions A series of mutations were achieved, showing higher thermostability and activity than the wild-type enzyme by semi-rational mutagenesis with limited structure information. Our findings provide important new insights into molecular modifications aimed at improving Ana-rLOX thermostability and activity. Electronic supplementary material The online version of this article (10.1186/s12896-018-0468-4) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Hui Qian
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Chong Zhang
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Bingjie Xia
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Haizhen Zhao
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China
| | - Fengxia Lu
- College of Food Science and Technology, Nanjing Agricultural University, 1st Weigang, Nanjing, 210095, People's Republic of China.
| | - Guang-Yu Yang
- State Key Laboratory of Microbial Metabolism, College of Life Science and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Rd, Shanghai, 200240, People's Republic of China.
| |
Collapse
|
8
|
Affiliation(s)
- Uwe T. Bornscheuer
- Department of Biotechnology & Enzyme Catalysis, Institute of Biochemistry, Greifswald University, 17487 Greifswald, Germany
| |
Collapse
|
9
|
Zorn K, Oroz-Guinea I, Brundiek H, Bornscheuer UT. Engineering and application of enzymes for lipid modification, an update. Prog Lipid Res 2016; 63:153-64. [DOI: 10.1016/j.plipres.2016.06.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/30/2016] [Accepted: 06/10/2016] [Indexed: 12/21/2022]
|
10
|
Nimpiboon P, Kaulpiboon J, Krusong K, Nakamura S, Kidokoro SI, Pongsawasdi P. Mutagenesis for improvement of activity and thermostability of amylomaltase from Corynebacterium glutamicum. Int J Biol Macromol 2016; 86:820-8. [PMID: 26875536 DOI: 10.1016/j.ijbiomac.2016.02.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 02/05/2016] [Accepted: 02/08/2016] [Indexed: 11/25/2022]
Abstract
This work aims to improve thermostability of amylomaltase from a mesophilic Corynebacterium glutamicum (CgAM) by random and site-directed mutagenesis. From error prone PCR, a mutated CgAM with higher thermostability at 50 °C compared to the wild-type was selected and sequenced. The result showed that the mutant contains a single mutation of A406V. Site-directed mutagenesis was then performed to construct A406V and A406L. Both mutated CgAMs showed higher intermolecular transglucosylation activity with an upward shift in the optimum temperature and a slight increase in the optimum pH for disproportionation and cyclization reactions. Thermostability of both mutated CgAMs at 35-40 °C was significantly increased with a higher peak temperature from DSC spectra when compared to the wild-type. A406V had a greater effect on activity and thermostability than A406L. The catalytic efficiency values kcat/Km of A406V- and A406L-CgAMs were 2.9 and 1.4 times higher than that of the wild-type, respectively, mainly due to a significant increase in kcat. LR-CD product analysis demonstrated that A406V gave higher product yield, especially at longer incubation time and higher temperature, in comparison to the wild-type enzyme.
Collapse
Affiliation(s)
- Pitchanan Nimpiboon
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Jarunee Kaulpiboon
- Department of Pre-Clinical Science, Biochemistry, Faculty of Medicine, Thammasat University, Pathumthani 12120, Thailand
| | - Kuakarun Krusong
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Shigeyoshi Nakamura
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
| | - Shun-ichi Kidokoro
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
| | - Piamsook Pongsawasdi
- Starch and Cyclodextrin Research Unit, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| |
Collapse
|