1
|
Li J, Xie X, Cai J, Wang H, Yang J. Enhanced Secretory Expression and Surface Display Level of Bombyx mori Acetylcholinesterase 2 by Pichia pastoris Based on Codon Optimization Strategy for Pesticides Setection. Appl Biochem Biotechnol 2021; 193:3321-3335. [PMID: 34160750 DOI: 10.1007/s12010-021-03597-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Accepted: 05/28/2021] [Indexed: 11/28/2022]
Abstract
The cholinesterase-based spectrophotometric assay, also called enzyme inhibition method, is a good choice for rapid detection of organophosphate pesticides (OPs) and carbamate pesticides (CPs). Obviously, the cholinesterase is the core reagent in enzyme inhibition method. In our previous work, a recombinant acetylcholinesterase 2 from Bombyx mori (rBmAChE2) was expressed in yeast successfully and exhibited great sensitivity. However, the yield of rBmAChE2 is not desirable. In this study, a codon optimization strategy was employed to enhance the yield of rBmAChE2 in Pichia pastoris GS115. Results showed that by replacing 6 key rare codons and increasing the percentage of bases G and C up to 46.85%, codon adaptation index (CAI) of Bombyx mori acetylcholinesterase 2 (bmace2) gene was improved from 0.70 to 0.81. After being transformed into Pichia pastoris GS115 via electroporation, the expression transformant can produce 139.7 U/mL secretory codon-optimized rBmAChE2 (opt-rBmAChE2) in the culture supernatant, 3.62 times higher than that of strain bearing the wild-type bmace2 gene. Meanwhile, opt-rBmAChE2 displayed on the yeast surface was up to 2280.02 U/g, 2.8 times higher than wild-type displayed rBmAChE2. In addition, either secretory or surface-displayed opt-rBmAChE2 maintained the similar sensitivities to the wild-type rBmAChE2 for tested inhibitors. Furthermore, the detection limits of the opt-rBmAChE2-based enzyme inhibition method for 10 kinds of OPs or CPs (0.01-2.69 mg/kg) were lower than most of the indexes present in current standard method (GB/T 5009.199-2003) or the maximum residue limits (GB 2763-2019) in China. The results might contribute to the utilization of rBmAChE2 for pesticide residue screening detection in practice.
Collapse
Affiliation(s)
- Jiadong Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Xi Xie
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, People's Republic of China.,College of Light Industry and Food, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, People's Republic of China
| | - Jun Cai
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, People's Republic of China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
| | - Jinyi Yang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, People's Republic of China.
| |
Collapse
|
2
|
Li J, Cai J, Ma M, Li L, Lu L, Wang Y, Wang C, Yang J, Xu Z, Yao M, Shen X, Wang H. Preparation of a Bombyx mori acetylcholinesterase enzyme reagent through chaperone protein disulfide isomerase co-expression strategy in Pichia pastoris for detection of pesticides. Enzyme Microb Technol 2020; 144:109741. [PMID: 33541576 DOI: 10.1016/j.enzmictec.2020.109741] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 12/16/2020] [Accepted: 12/21/2020] [Indexed: 01/15/2023]
Abstract
The cholinesterase-based spectrophotometric methods for detection of organophosphate pesticides (OPs) and carbamate pesticides (CPs) have been proposed as a good choice for their high efficiency, simplicity and low cost. The enzyme, as a core reagent, is of great importance for the developed method. In this study, a protein disulfide isomerase (PDI) co-expression strategy in Pichia pastoris was employed to enhance the yield of recombinant Bombyx mori acetylcholinesterase 2 (rBmAChE2). Subsequently, the prepared enzyme reagent was used to detect the pesticides in real samples. The results showed that the co-expression of rBmAChE2 with PDI increased the enzyme activity of the supernatant and the yield of purified rBmAChE2 up to 60 U/mL and 6 mg/L respectively, both almost 5-fold higher than those of original recombinant strain. In addition, 5 g/L gelatin reagent could help to preserve nearly 90% of the rBmAChE2 activity for 90 days in 4°C and the limits of detections (LODs) of the rBmAChE2-based assay for 20 kinds of OPs or CPs ranged from 0.010 to 2.725 mg/kg, which were lower than most of indexes present in current Chinese National Standard (GB/T 5009.199-2003) or the maximum residue limits (GB 2763-2019). Furthermore, the detection results of 23 vegetable samples were verified by the ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) method, which indicated that the rBmAChE2-based assay in this work is suitable for pesticide residues rapid detection.
Collapse
Affiliation(s)
- Jiadong Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Jun Cai
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Minting Ma
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Liping Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Linping Lu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Yu Wang
- Guangzhou Institute for Food Inspection, Guangzhou, 510080, PR China.
| | - Chenglong Wang
- Guangzhou Institute for Food Inspection, Guangzhou, 510080, PR China.
| | - Jinyi Yang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Zhenlin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Min Yao
- Faculty of Advanced Life Science, Hokkaido University, Kita-10, Nishi-8, Kita-ku, Sapporo, 060-0810, Japan.
| | - Xing Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, National-Local Joint Engineering Research Center for Processing and Safety Control of Livestock and Poultry Products, College of Food Science, South China Agricultural University, Guangzhou, 510642, PR China.
| |
Collapse
|
3
|
Colorimetric detection of dichlorvos using polydiacetylene vesicles with acetylcholinesterase and cationic surfactants. Biosens Bioelectron 2014; 62:8-12. [DOI: 10.1016/j.bios.2014.05.069] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 05/20/2014] [Accepted: 05/24/2014] [Indexed: 11/17/2022]
|
4
|
Surface display of recombinant Drosophila melanogaster acetylcholinesterase for detection of organic phosphorus and carbamate pesticides. PLoS One 2013; 8:e72986. [PMID: 24039837 PMCID: PMC3767663 DOI: 10.1371/journal.pone.0072986] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Accepted: 07/23/2013] [Indexed: 11/18/2022] Open
Abstract
Acetylcholinesterase (AChE) is commonly used for the detection of organophosphate (OP) and carbamate (CB) insecticides. However, the cost of this commercially available enzyme is high, making high-throughput insecticide detection improbable. In this study we constructed a new AChE yeast expression system in Saccharomyces cerevisiae for the expression of a highly reactive recombinant AChE originating from Drosophila melanogaster (DmAChE). Specifically, the coding sequence of DmAChE was fused with the 3′-terminal half of an α-agglutinin anchor region, along with an antigen tag for the detection of the recombinant protein. The target sequence was cloned into the yeast expression vector pYes-DEST52, and the signal peptide sequence was replaced with a glucoamylase secretion region for induced expression. The resultant engineered vector was transformed into S. cerevisiae. DmAChE was expressed and displayed on the cell surface after galactose induction. Our results showed that the recombinant protein displayed activity comparable to the commercial enzyme. We also detected different types of OP and CB insecticides through enzyme inhibition assays, with the expressed DmAChE showing high sensitivity. These results show the construction of a new yeast expression system for DmAChE, which can subsequently be used for detecting OP and CB insecticides with reduced economic costs.
Collapse
|
5
|
Dong JX, Xie X, He YS, Beier RC, Sun YM, Xu ZL, Wu WJ, Shen YD, Xiao ZL, Lai LN, Wang H, Yang JY. Surface display and bioactivity of Bombyx mori acetylcholinesterase on Pichia pastoris. PLoS One 2013; 8:e70451. [PMID: 23940577 PMCID: PMC3734245 DOI: 10.1371/journal.pone.0070451] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 06/19/2013] [Indexed: 12/13/2022] Open
Abstract
A Pichia pastoris (P. pastoris) cell surface display system of Bombyx mori acetylcholinesterase (BmAChE) was constructed and its bioactivity was studied. The modified Bombyx mori acetylcholinesterase gene (bmace) was fused with the anchor protein (AGα1) from Saccharomyces cerevisiae and transformed into P. pastoris strain GS115. The recombinant strain harboring the fusion gene bmace-AGα1 was induced to display BmAChE on the P. pastoris cell surface. Fluorescence microscopy and flow cytometry assays revealed that the BmAChE was successfully displayed on the cell surface of P. pastoris GS115. The enzyme activity of the displayed BmAChE was detected by the Ellman method at 787.7 U/g (wet cell weight). In addition, bioactivity of the displayed BmAChE was verified by inhibition tests conducted with eserine, and with carbamate and organophosphorus pesticides. The displayed BmAChE had an IC50 of 4.17×10(-8) M and was highly sensitive to eserine and five carbamate pesticides, as well as seven organophosphorus pesticides. Results suggest that the displayed BmAChE had good bioactivity.
Collapse
Affiliation(s)
- Jie-Xian Dong
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Xi Xie
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Yong-Sheng He
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
- Shenzhen Academy of Metrology and Quality Inspection, Shenzhen, Guangdong Province, China
| | - Ross C. Beier
- United States Department of Agriculture, Agricultural Research Service, Southern Plains Agricultural Research Center, Food and Feed Safety Research Unit, College Station, Texas, United States of America
| | - Yuan-Ming Sun
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Wei-Jian Wu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Zhi-Li Xiao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Li-Na Lai
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| | - Jin-Yi Yang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou, Guangdong Province, China
| |
Collapse
|
6
|
Chromogenic platform based on recombinant Drosophila melanogaster acetylcholinesterase for visible unidirectional assay of organophosphate and carbamate insecticide residues. Anal Chim Acta 2012; 720:126-33. [DOI: 10.1016/j.aca.2012.01.041] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 01/04/2012] [Accepted: 01/17/2012] [Indexed: 11/21/2022]
|
7
|
Cai T, Zhang L, Wang H, Zhang J, Guo Y. Assisted inhibition effect of acetylcholinesterase with n-octylphosphonic acid and application in high sensitive detection of organophosphorous pesticides by matrix-assisted laser desorption/ionization Fourier transform mass spectrometry. Anal Chim Acta 2011; 706:291-6. [DOI: 10.1016/j.aca.2011.08.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 07/28/2011] [Accepted: 08/24/2011] [Indexed: 11/30/2022]
|
8
|
Zhou X, Xia Y. Expression and characterization of recombinant Locusta migratoria manilensis acetylcholinesterase 1 in Pichia pastoris. Protein Expr Purif 2011; 77:62-7. [DOI: 10.1016/j.pep.2010.11.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 11/26/2010] [Accepted: 11/29/2010] [Indexed: 10/18/2022]
|
9
|
Lang GJ, Shang JY, Chen YX, Cui YJ, Wang Q, Tang ZH, Zhang CX. Expression of the housefly acetylcholinesterase in a bioreactor and its potential application in the detection of pesticide residues. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0360-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Pohanka M, Koch M. Variation of cholinesterase-based biosensor sensitivity to inhibition by organophosphate due to ionizing radiation. SENSORS (BASEL, SWITZERLAND) 2009; 9:5580-9. [PMID: 22346715 PMCID: PMC3274157 DOI: 10.3390/s90705580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Revised: 06/27/2009] [Accepted: 07/01/2009] [Indexed: 11/25/2022]
Abstract
A cholinesterase based biosensor was constructed in order to assess the effects of ionizing radiation on exposed AChE. Although the primary objective of the experiment was to investigate the effect of ionizing radiation on the activity of the biosensor, no changes in cholinesterase activity were observed. Current provided by oxidation of thiocholine previously created from acetylthiocholine by enzyme catalyzed reaction was in a range 395-455 nA. No significant influence of radiation on AChE activity was found, despite the current variation. However, a surprising phenomenon was observed when a model organophosphate paraoxon was assayed. Irradiated biosensors seem to be more susceptible to the inhibitory effects of paraoxon. Control biosensors provided a 94 ± 5 nA current after exposure to 1 ppm paraoxon. The biosensors irradiated by a 5 kGy radiation dose and exposed to paraoxon provided a current of 49 ± 6 nA. Irradiation by doses ranging from 5 mGy to 100 kGy were investigated and the mentioned effect was confirmed at doses above 50 Gy. After the first promising experiments, biosensors irradiated by 5 kGy were used for calibration on paraoxon and compared with the control biosensors. Limits of detection 2.5 and 3.8 ppb were achieved for irradiated and non-irradiated biosensors respectively. The overall impact of this effect is discussed.
Collapse
Affiliation(s)
- Miroslav Pohanka
- Centre for Advanced Studies and Department of Toxicology, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 50002 Hradec Kralove, Czech Republic
| | - Miroslav Koch
- VF Company, Namesti Miru 50, 679 21 Cerna Hora, Czech Republic; E-Mail:
| |
Collapse
|
11
|
Chen H, Zuo X, Su S, Tang Z, Wu A, Song S, Zhang D, Fan C. An electrochemical sensor for pesticide assays based on carbon nanotube-enhanced acetycholinesterase activity. Analyst 2008; 133:1182-6. [PMID: 18709192 DOI: 10.1039/b805334k] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There has been urgent demand for rapid, sensitive and cost-effective pesticide assay technologies due to the global attention of environmental and food-safety problems. Acetycholinesterase (AChE)-based electrochemical sensors have attracted significant interest toward this goal. In this contribution, we introduced multiwalled carbon nanotubes (MWNTs) into our sensor design, where they played dual enhancement roles; first is that MWNTs loaded on glassy carbon (GC) electrodes significantly increase surface areas, facilitating the electrochemical polymerization of prussian blue (PB), a redox mediator for the electrochemical oxidation of the enzymatic product, thiocholine (TCh). Second, MWNTs enhance the enzymatic activity of AChE, as manifested by the decreased Michaelis-Menten constant (K(m)). As a result of these two important enhancement factors offered by MWNTs, our electrochemical pesticide sensor exhibited rapid response and high sensitivity toward the detection of a series of pesticides. Moreover, we demonstrated that this sensor was stable, reproducible and selective enough for detection in real samples.
Collapse
Affiliation(s)
- Haode Chen
- College of Life Science and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Synthesis of Drosophila melanogaster acetylcholinesterase gene using yeast preferred codons and its expression in Pichia pastoris. Chem Biol Interact 2008; 175:403-5. [PMID: 18514176 DOI: 10.1016/j.cbi.2008.04.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Revised: 04/09/2008] [Accepted: 04/10/2008] [Indexed: 11/21/2022]
Abstract
To improve the expression level of recombinant Drosophila melanogaster AChE (R-DmAChE) in Pichia pastoris, the cDNA of DmAChE was first optimized and synthesized based on the preferred codon usage of P. pastoris. The synthesized AChE cDNA without glycosylphosphatidylinositol (GPI) signal peptide sequence was then ligated to the P. pastoris expression vector, generating the plasmid pPIC9K/DmAChE. The linearized plasmid was homologously integrated into the genome of P. pastoris GS115 via electrotransformation. Finally seven transformants with high expression level of R-DmAChE activity were obtained. The highest production of R-DmAChE in shake-flask culture after 5-day induction by methanol was 718.50 units/mL, which was about three times higher than our previous expression level of native DmAChE gene in P. pastoris. Thus, these new strains with the ability to secret R-DmAChE in the medium could be used for production of R-DmAChE to decrease the cost of the enzyme expense for rapid detection of organophosphate and carbamate insecticide residues.
Collapse
|