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Wang Z, Sun Y. A hybrid nanobiocatalyst with in situ encapsulated enzyme and exsolved Co nanoclusters for complete chemoenzymatic conversion of methyl parathion to 4-aminophenol. J Hazard Mater 2022; 424:127755. [PMID: 34799161 DOI: 10.1016/j.jhazmat.2021.127755] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 10/25/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Combination of enzymatic and chemical reactions provides tremendous possibilities for chemoenzymatic cascade processes. However, constructing efficient hybrid catalysts still faces great challenges. Herein, we develop a hybrid catalyst by in situ encapsulating organophosphorus hydrolase (OPH) into a Zn-doped Co-based ZIF (0.8CoZIF) via biomimetic mineralization for the chemoenzymatic cascade conversion of methyl parathion to 4-nitrophenol and then 4-aminophenol. The exsolved Co nanoclusters in Zn/Co-ZIF are found to catalyze 4-nitrophenol reduction into 4-aminophenol in the presence of sodium borohydride (NaBH4). The as-synthesized OPH@0.8CoZIF catalyzes the complete conversion of 95 μM methyl parathion at nearly 100% 4-aminophenol production in the presence of 50 mM NaBH4 within 15 min, which is 1/4 that of the physical mixture of OPH and 0.8CoZIF, benefiting from the MP accumulation and substrate channeling in the hybrid catalyst. The maximum cascade conversion rate of MP to 4-AP reaches 8.07 μmol·min-1·g-catalyst-1, which is higher than most of the reported chemoenzymatic cascade catalysts. Therefore, the hybrid nanocatalyst containing Co-ZIF-based catalyst and OPH is successfully fabricated and enables to catalyze the complete conversion of a toxic pollutant like methyl parathion into a non-toxic resource like 4-aminophenol for recycling in useful chemical synthesis through efficient one-pot cascade reactions.
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Affiliation(s)
- Zhenfu Wang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China
| | - Yan Sun
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China; Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China.
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2
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Zhao S, Xu W, Zhang W, Wu H, Guang C, Mu W. Overview of a bioremediation tool: organophosphorus hydrolase and its significant application in the food, environmental, and therapy fields. Appl Microbiol Biotechnol 2021; 105:8241-53. [PMID: 34665276 DOI: 10.1007/s00253-021-11633-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 10/01/2021] [Accepted: 10/03/2021] [Indexed: 12/14/2022]
Abstract
In the past decades, the organophosphorus compounds had been widely used in the environment and food industries as pesticides. Owing to the life-threatening and long-lasting problems of organophosphorus insecticide (OPs), an effective detection and removal of OPs have garnered growing attention both in the scientific and practical fields in recent years. Bacterial organophosphorus hydrolases (OPHs) have been extensively studied due to their high specific activity against OPs. OPH could efficiently hydrolyze a broad range of substrates both including the OP pesticides and some nerve agents, suggesting a great potential for the remediation of OPs. In this review, the microbial identification, molecular modification, and practical application of OPHs were comprehensively discussed.Key points• Microbial OPH is a significant bioremediation tool against OPs.• Identification and molecular modification of OPH was discussed in detail.• The applications of OPH in food, environmental, and therapy fields are presented.
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3
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Badakhshan R, Mohammadi M, Farnoosh G. Improving the specificity of organophosphorus hydrolase to acephate by mutagenesis at its binding site: a computational study. J Mol Model 2021; 27:164. [PMID: 33970322 DOI: 10.1007/s00894-021-04749-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 04/15/2021] [Indexed: 11/26/2022]
Abstract
Organophosphorus hydrolase (OPH) is one of the most important enzymes in order to bioremediation of organophosphorus (OP) pesticides. OPH is capable of degrading a wide variety of OPs, but it has poor specificity to OPs with P-S bond, including acephate. Given that the binding site residues of OPH determine its substrate specificity, this study was carried out to find the best OPH mutants containing a single point mutation in the binding site that possess improved specificity to acephate. Hence, we generated all possible mutant models and performed molecular docking of acephate with wild-type OPH (OPH-WT) and its mutants. After that, molecular dynamic (MD) simulations of OPH-WT and the best mutants, according to the docking results, were performed in both apo- and complex with acephate forms. Docking results signified that 51 out of 228 mutants possessed increased binding affinities to acephate, as compared to OPH-WT. Of them, W131N, W131G, and H254Y were the best mutants considering the high binding affinities and proper orientation of the ligand at their active sites. MD simulations confirmed the stability of the three mutants in both apo- and complex with acephate forms and also showed that these formed more stable complexes with acephate, as compared to OPH-WT. MD results also suggested that W131N and W131G, in addition to enhanced specificity, could keep the necessary configuration for acephate hydrolysis during the simulations.
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Affiliation(s)
- Reza Badakhshan
- Applied Biotechnology Research Centre, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mozafar Mohammadi
- Applied Biotechnology Research Centre, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Gholamreza Farnoosh
- Applied Biotechnology Research Centre, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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Goud KY, Sandhu SS, Teymourian H, Yin L, Tostado N, Raushel FM, Harvey SP, Moores LC, Wang J. Textile-based wearable solid-contact flexible fluoride sensor: Toward biodetection of G-type nerve agents. Biosens Bioelectron 2021; 182:113172. [PMID: 33812282 DOI: 10.1016/j.bios.2021.113172] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/07/2021] [Accepted: 03/13/2021] [Indexed: 12/12/2022]
Abstract
Rising global concerns posed by chemical and biological threat agents highlight the critical need to develop reliable strategies for the real-time detection of such threats. While wearable sensing technology is well suited to fulfill this task, the use of on-body devices for rapid and selective field identification of chemical agents is relatively a new area. This work describes a flexible printed textile-based solid-contact potentiometric sensor for the selective detection of fluoride anions liberated by the biocatalytic hydrolysis of fluorine-containing G-type nerve agents (such as sarin or soman). The newly developed solid-contact textile fluoride sensor relies on a fluoride-selective bis(fluorodioctylstannyl)methane ionophore to provide attractive analytical performance with near-Nernstian sensitivity and effective discrimination against common anions, along with excellent reversibility and repeatability for dynamically changing fluoride concentrations. By using stress-enduring printed inks and serpentine structures along with stretchable textile substrates, the resulting textile-based fluoride sensor exhibits robust mechanical resiliency under severe mechanical strains. Such realization of an effective textile-based fluoride-selective electrode allowed biosensing of the nerve-agent simulant diisopropyl fluorophosphate (DFP), in connection to immobilized organophosphorus acid anhydrolylase (OPAA) or organophosphorus hydrolase (OPH) enzymes. A user-friendly portable electronic module transmits data from the new textile-based potentiometric biosensor wirelessly to a nearby smartphone for alerting the wearer instantaneously about potential chemical threats. While expanding the scope of wearable solid-contact anion sensors, such a textile-based potentiometric fluoride electrode transducer offers particular promise for effective discrimination of G-type neurotoxins from organophosphate (OP) pesticides, toward specific field detection of these agents in diverse defense settings.
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Affiliation(s)
- K Yugender Goud
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States
| | - Samar S Sandhu
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States
| | - Hazhir Teymourian
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States
| | - Lu Yin
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States
| | - Nicholas Tostado
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States
| | - Frank M Raushel
- Department of Chemistry, Texas A&M University, College Station, TX, 77843, United States
| | - Steven P Harvey
- U.S. Army Combat Capabilities and Development Command-Chemical Biological Center (CCDC-CBC), Aberdeen Proving Ground, MD, 1010, United States
| | - Lee C Moores
- U.S. Army Engineer Research and Development Center, Installation and Operation Environment Program, Environmental Laboratory, 3909 Halls Ferry Road, Vicksburg, MS, 39180, United States
| | - Joseph Wang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, United States.
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Wei J, Xue Y, Dong J, Wang S, Hu H, Gao H, Li P, Wang Y. A new fluorescent technique for pesticide detection by using metal coordination polymer and nanozyme. Chin Med 2020; 15:22. [PMID: 32175000 PMCID: PMC7063803 DOI: 10.1186/s13020-020-00304-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 02/23/2020] [Indexed: 12/20/2022] Open
Abstract
Background Chinese herbs have been widely used for thousands of years. In order to kill or control insects and fungus during the cultivation of herb plants, pesticides have played a significant role. More than 30 kinds of pesticides have been documented in the latest version of Chinese Pharmacopoeia. It is urgent to develop new analytical methods for pesticide detection. Methods A fluorescent detection system was established by using Cerium based fluorescent polymer and Sm-CeO2. As a new doped nanozyme, Sm-CeO2 exhibits OPH-like activity to hydrolyze OPP pesticide. Results The morphology of the prepared CFP and Sm-CeO2 were characterized. The optimal conditions for CFP synthesis are CeCl3 (16 mmol L−1, 200 μL), ATP (4 mmol L−1, 200 μL) and Tris buffer (5 mmol L−1, 500 μL, pH 8.0). Sm-CeO2 shows the best mimic activity to hydrolyze OPP pesticide at pH = 8.0. The results exhibit good linear relationship between fluorescent quenching effect and MP in the range of 2–50 μmol L−1. Finally, this fluorescent technique was successfully applied in Poria cocos and Semen Coicis sample. Conclusions It is the first report on OPP detection by using CFP and doped nanozyme. The successful application in real sample indicates this method is a rapid, reliable strategy to detect OPP in Chinese herbs.
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Affiliation(s)
- Jinchao Wei
- 1Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China.,2State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yan Xue
- 2State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jiayi Dong
- 3Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China
| | - Shuangpeng Wang
- 3Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China
| | - Hao Hu
- 2State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Hao Gao
- 1Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, China
| | - Peng Li
- 2State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yitao Wang
- 2State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
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Moon Y, Jafry AT, Bang Kang S, Young Seo J, Baek KY, Kim EJ, Pan JG, Choi JY, Kim HJ, Han Lee K, Jeong K, Bae SW, Shin S, Lee J, Lee Y. Organophosphorus hydrolase-poly-β-cyclodextrin as a stable self-decontaminating bio-catalytic material for sorption and degradation of organophosphate pesticide. J Hazard Mater 2019; 365:261-269. [PMID: 30447633 DOI: 10.1016/j.jhazmat.2018.10.094] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 10/05/2018] [Accepted: 10/31/2018] [Indexed: 05/25/2023]
Abstract
A region suffering from an attack of a nerve agent requires not only a highly sorptive material but also a fast-acting catalyst to decontaminate the lethal chemical present. The product should be capable of high sorptive capacity, selectivity and quick response time to neutralize the long lasting harmful effects of nerve agents. Herein, we have utilized organophosphorus hydrolase (OPH) as a non-toxic bio-catalytic material held in with the supporting matrix of poly-β-cyclodextrin (PCD) as a novel sorptive reinforced self-decontaminating material against organophosphate intoxication. OPH coated PCD (OPH-PCD) will not only be providing support for holding enzyme but also would be adsorbing methyl paraoxon (MPO) used as a simulant, in a host-guest inclusion complex formation. Sorption trend for PCD revealed preference towards the more hydrophobic MPO against para-nitrophenol (pNP). The results show sorption capacity of 1.26 mg/g of 100 μM MPO with PCD which was 1.7 times higher compared to pNP. The reaction rate with immobilized OPH-PCD was found to be 23% less compared to free enzyme. With the help of OPH-PCD, continuous hydrolysis (100%) of MPO into pNP was observed for a period of 24 h through packed bed reactor with good reproducibility and stability of enzyme. The long-term stability also confirmed its stable nature for the investigation period of 4 days where it maintained activity. Combined with its fast and reactive nature, the resulting self-decontaminating regenerating material provides a promising strategy for the neutralization of nerve agents and preserving the environment.
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Affiliation(s)
- Youngkwang Moon
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Ali Turab Jafry
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Soon Bang Kang
- Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Jin Young Seo
- Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Kyung-Youl Baek
- Korea Institute of Science and Technology, Seoul, Republic of Korea
| | | | | | | | - Hyun-Ji Kim
- Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Kang Han Lee
- Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Keunhong Jeong
- Department of Chemistry and Nuclear & WMD Protection Research Center, Korea Military Academy, Seoul, Republic of Korea
| | - Se Won Bae
- Korea Institute of Industrial Technology, Cheonan, Republic of Korea
| | - Seunghan Shin
- Korea Institute of Industrial Technology, Cheonan, Republic of Korea
| | - Jinkee Lee
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea.
| | - Yongwoo Lee
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do, 16419, Republic of Korea.
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Song T, Wang F, Xiong S, Jiang H. Surface display of organophosphorus-degrading enzymes on the recombinant spore of Bacillus subtilis. Biochem Biophys Res Commun 2019; 510:13-19. [PMID: 30660365 DOI: 10.1016/j.bbrc.2018.12.077] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 12/11/2018] [Indexed: 12/17/2022]
Abstract
Organophosphorus-degrading enzymes show high hydrolysis efficiency and provide an environmentally friendly solution to the pollution of organophosphorus compound. However, poor enzyme stability and tedious purification process have limited practical applications. Spore-based display system can provide many advantages, such as safety, low cost, easy preparation and high resistance to harsh conditions. Recently, we have constituted the recombinant spore displaying organophosphorus hydrolase and organophosphorus acid anhydrolase. In the spore display systems, recombinant spores could be reliably produced and normal sporulation was not affected; the activities of recombinant spores were 15.81 and 10.67 U/mg spores (dry weight) respectively; furthermore, the recombinant spores exhibited significantly enhanced resistance to various harsh conditions compared to free-form enzymes. These results indicated that the spore display could contribute to the practical application of organophosphorus-degrading enzymes and provide a promising solution to bioremediation of organophosphorus compounds.
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Affiliation(s)
- Tianyu Song
- Research Institute of Chemical Defense, Academy of Military Sciences, Beijing, 102205, PR China; State Key Laboratory of NBC Protection for Civilian, Academy of Military Sciences, Beijing, 102205, PR China
| | - Fuli Wang
- State Key Laboratory of NBC Protection for Civilian, Academy of Military Sciences, Beijing, 102205, PR China
| | - Shanshan Xiong
- Research Institute of Chemical Defense, Academy of Military Sciences, Beijing, 102205, PR China; State Key Laboratory of NBC Protection for Civilian, Academy of Military Sciences, Beijing, 102205, PR China
| | - Hui Jiang
- Research Institute of Chemical Defense, Academy of Military Sciences, Beijing, 102205, PR China; State Key Laboratory of NBC Protection for Civilian, Academy of Military Sciences, Beijing, 102205, PR China.
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8
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Ma X, Zhang L, Xia M, Zhang X, Zhang Y. Catalytic degradation of organophosphorous nerve agent simulants by polymer beads@graphene oxide with organophosphorus hydrolase-like activity based on rational design of functional bimetallic nuclear ligand. J Hazard Mater 2018; 355:65-73. [PMID: 29775879 DOI: 10.1016/j.jhazmat.2018.04.084] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 04/22/2018] [Accepted: 04/29/2018] [Indexed: 06/08/2023]
Abstract
The degradation of organophosphorous nerve agents is of primary concern due to the severe toxicity of these agents. Based on the active center of organophosphorus hydrolase (OPH), a bimetallic nuclear ligand, (5-vinyl-1,3-phenylene)bis(di(1H-imidazol-2-yl) methanol) (VPIM), was designed and synthesized, which contains four imidazole groups to mimic the four histidines at OPH active center. By grafting VPIM on graphene oxide (GO) surface via polymerization, the VPIM-polymer beads@GO was produced. The obtained OPH mimics has an impressive activity in dephosphorylation reactions (turnover frequency (TOF) towards paraoxon: 2.3 s-1). The synergistic catalytic effect of the bimetallic Zn2+ nuclear center and carboxyl groups on surface of GO possibly contributes to the high hydrolysis on organophosphate substrate. Thus, a biomimetic catalyst for efficient degradation of some organophosphorous nerve agent simulants, such as paraoxon and chlorpyrifos, was prepared by constructing catalytic active sites. The proposed mechanism and general synthetic strategy open new avenues for the engineering of functional GOs for biomimetic catalysts.
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Affiliation(s)
- Xuejuan Ma
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Changan West Road 620, 710119, Xi'an, China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Changan West Road 620, 710119, Xi'an, China
| | - Lin Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Changan West Road 620, 710119, Xi'an, China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Changan West Road 620, 710119, Xi'an, China
| | - Mengfan Xia
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Changan West Road 620, 710119, Xi'an, China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Changan West Road 620, 710119, Xi'an, China
| | - Xiaohong Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Changan West Road 620, 710119, Xi'an, China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Changan West Road 620, 710119, Xi'an, China
| | - Yaodong Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Changan West Road 620, 710119, Xi'an, China; Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Changan West Road 620, 710119, Xi'an, China.
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Efremenko EN, Lyagin IV, Klyachko NL, Bronich T, Zavyalova NV, Jiang Y, Kabanov AV. A simple and highly effective catalytic nanozyme scavenger for organophosphorus neurotoxins. J Control Release 2016; 247:175-181. [PMID: 28043864 DOI: 10.1016/j.jconrel.2016.12.037] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 12/19/2016] [Accepted: 12/29/2016] [Indexed: 10/20/2022]
Abstract
A simple and highly efficient catalytic scavenger of poisonous organophosphorus compounds, based on organophosphorus hydrolase (OPH, EC 3.1.8.1), is produced in aqueous solution by electrostatic coupling of the hexahistidine tagged OPH (His6-OPH) and poly(ethylene glycol)-b-poly(l-glutamic acid) diblock copolymer. The resulting polyion complex, termed nano-OPH, has a spherical morphology and a diameter from 25nm to 100nm. Incorporation of His6-OPH in nano-OPH preserves catalytic activity and increases stability of the enzyme allowing its storage in aqueous solution for over a year. It also decreases the immune and inflammatory responses to His6-OPH in vivo as determined by anti-OPH IgG and cytokines formation in Sprague Dawley rats and Balb/c mice, respectively. The nano-OPH pharmacokinetic parameters are improved compared to the naked enzyme suggesting longer blood circulation after intravenous (iv) administrations in rats. Moreover, nano-OPH is bioavailable after intramuscular (im), intraperitoneal (ip) and even transbuccal (tb) administration, and has shown ability to protect animals from exposure to a pesticide, paraoxon and a warfare agent, VX. In particular, a complete protection against the lethal doses of paraoxon was observed with nano-OPH administered iv and ip as much as 17h, im 5.5h and tb 2h before the intoxication. Further evaluation of nano-OPH as a catalytic bioscavenger countermeasure against organophosphorus chemical warfare agents and pesticides is warranted.
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Affiliation(s)
- Elena N Efremenko
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Building 3, Moscow 119991, Russia.
| | - Ilya V Lyagin
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Building 3, Moscow 119991, Russia
| | - Natalia L Klyachko
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Building 3, Moscow 119991, Russia; Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, 125 Mason Farm Road, Chapel Hill, NC 27599-7362, United States
| | - Tatiana Bronich
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Building 3, Moscow 119991, Russia; Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, S 42nd St. & Emile St., Omaha, NE 68198, United States
| | - Natalia V Zavyalova
- 27th Scientific Center of Ministry of Defense, 13 Brigadirsky Pereulok, Moscow 105005, Russia
| | - Yuhang Jiang
- Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, 125 Mason Farm Road, Chapel Hill, NC 27599-7362, United States
| | - Alexander V Kabanov
- Chemistry Department, Lomonosov Moscow State University, 1 Lenin Hills, Building 3, Moscow 119991, Russia; Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, 125 Mason Farm Road, Chapel Hill, NC 27599-7362, United States; Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, S 42nd St. & Emile St., Omaha, NE 68198, United States.
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10
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Songa EA, Okonkwo JO. Recent approaches to improving selectivity and sensitivity of enzyme-based biosensors for organophosphorus pesticides: A review. Talanta 2016; 155:289-304. [PMID: 27216686 DOI: 10.1016/j.talanta.2016.04.046] [Citation(s) in RCA: 178] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 01/05/2023]
Abstract
Pesticide determination has attracted great attention due to the fact that they exhibit high acute toxicity and can cause long-term damage to the environment and human lives even at trace levels. Although classical analytical methods (including gas chromatography, high performance liquid chromatography, capillary electrophoresis and mass spectrometry) have been effectively used for analysis of pesticides in contaminated samples, they present certain limitations such as time-consuming sample preparation, complexity, and the requirement of expensive instrumentation and highly skilled personnel. For these reasons, there is an expanding need for analytical methods able to provide simple, rapid, sensitive, selective, low cost and reliable detection of pesticides at trace levels. Over the past decades, acetylcholinesterase (AChE) biosensors have emerged as simple, rapid and ultra-sensitive tools for toxicity detection of pesticides in the environment and food. These biosensors have the potential to complement or replace the classical analytical methods by simplifying or eliminating sample preparation and making field-testing easier and faster with significant decrease in cost per analysis. With the recent engineering of more sensitive AChE enzymes, the development of more reliable immobilization matrices and the progress in the area of microelectronics, AChE biosensors could become competitive for multi-analyte screening and soon be used for the development of portable instrumentation for rapid toxicity testing of samples. The enzymes organophosphorus hydrolase (OPH) and organophosphorus acid anhydrolase (OPAA) have also shown considerable potential in OP biosensor applications and they have been used for direct detection of OPs. This review presents the recent advances in the fabrication of enzyme biosensors for organophosphorus pesticides (OPs) and their possible applications for toxicity monitoring of organophosphorus pesticide residues in real samples. The focus will be on the different strategies for the biosensor construction, the analytical performance of the biosensors and the advantages and disadvantages of these biosensor methods. The recent works done to improve the analytical performance, sensitivity and selectivity of these biosensors will also be discussed.
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Affiliation(s)
- Everlyne A Songa
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Private Bag X680, Arcadia, Pretoria 0001, South Africa
| | - Jonathan O Okonkwo
- Department of Environmental, Water and Earth Sciences, Tshwane University of Technology, Private Bag X680, Arcadia, Pretoria 0001, South Africa.
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Barman DN, Haque MA, Islam SMA, Yun HD, Kim MK. Cloning and expression of ophB gene encoding organophosphorus hydrolase from endophytic Pseudomonas sp. BF1-3 degrades organophosphorus pesticide chlorpyrifos. Ecotoxicol Environ Saf 2014; 108:135-141. [PMID: 25062445 DOI: 10.1016/j.ecoenv.2014.06.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 06/08/2014] [Accepted: 06/19/2014] [Indexed: 06/03/2023]
Abstract
Chlorpyrifos is an organophosphate pesticide that has adverse effect on animals and plants. We isolated endophytic bacterial strain, Pseudomonas sp. BF1-3, from balloon flower root which can hydrolyze chlorpyrifos. A gene (ophB) encoding a protein involved in chlorpyrifos degradation from this strain was cloned into Escherichia coli DH5α for confirming enzyme activity. After sequencing, total 1024bp nucleotide sequences were found in the open reading frame of ophB. The chlorpyrifos degradation patterns by E. coli DH5α (ophB) were observed. During incubation in minimal salt (M9) medium supplemented with chlorpyrifos (100mgL(-1)), the E. coli DH5α harboring ophB degraded about 97% initial chlorpyrifos (100mgL(-1)) and accumulated 86mgL(-1) 3,5,6-trichloro-2-pyridinol (TCP) within 9 days. In addition, optical density (OD) of E. coli DH5α (ophB) culture at 600nm was increased from 0.172 to 1.118 within 2 days of inoculation in the chlorpyrifos supplemented M9 medium. The estimated molecular weight of purified OphB protein was determined to be 31.4kDa by SDS-PAGE. The OphB enzyme was most active at pH 8 and an optimal temperature around 35°C. These results indicate that endophytic bacteria are supposed to be useful for biological control of environments contaminated with pesticides.
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Affiliation(s)
- Dhirendra Nath Barman
- Division of Applied Life Science (BK21 Plus Program), Gyeongsang National University, Chinju 660-701, Republic of Korea
| | - Md Azizul Haque
- Division of Applied Life Science (BK21 Plus Program), Gyeongsang National University, Chinju 660-701, Republic of Korea
| | - Shah Md Asraful Islam
- Department of Plant Pathology, Patuakhali Science and Technology University, Dumki, Patuakhali 8602, Bangladesh
| | - Han Dae Yun
- Division of Applied Life Science (BK21 Plus Program), Gyeongsang National University, Chinju 660-701, Republic of Korea; Research Institute of Agriculture and Life Science, Gyeongsang National University, Chinju 660-701, Republic of Korea
| | - Min Keun Kim
- Gyeongsangnam-do Agricultural Research and Extension Service, Chinju 660-360, Republic of Korea.
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Tang X, Zhang T, Liang B, Han D, Zeng L, Zheng C, Li T, Wei M, Liu A. Sensitive electrochemical microbial biosensor for p-nitrophenylorganophosphates based on electrode modified with cell surface-displayed organophosphorus hydrolase and ordered mesopore carbons. Biosens Bioelectron 2014; 60:137-42. [PMID: 24794405 DOI: 10.1016/j.bios.2014.04.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 04/01/2014] [Accepted: 04/01/2014] [Indexed: 11/25/2022]
Abstract
A novel electrochemical microbial biosensor for the rapid monitoring of p-nitrophenyl-substituted organophosphates (OPs) compounds based on glass carbon electrode (GCE) modified with both ordered mesopore carbons (OMCs) and cell surface-expressed organophosphorus hydrolase (OPH) (OPH-bacteria/OMCs/GCE) was described in this paper. The genetically engineered Escherichia coli strain surface displayed mutant OPH (S5) with improved enzyme activity and favorable stability was constructed using a newly identified N-terminal of ice nucleation protein as an anchoring motif, which can be used directly without further time-consuming enzyme-extraction and purification, thereafter greatly improved the stability of the enzyme. Compared to OPH-bacteria modified GCE (OPH-bacteria/GCE), the OPH-bacteria/OMCs/GCE not only significantly enhanced the current response but also reduced the oxidation overpotential towards oxidizable p-nitrophenol (p-NP), which was the hydrolysate of p-nitrophenyl-substituted OPs. Under the optimized experimental conditions, at +0.84 V (vs. SCE), the current-time curve was performed with varying OPs concentration. The current response was linear with paraoxon concentration within 0.05-25 μM. Similarly, linear range of 0.05-25 μM was found for parathion, and 0.08-30 μM for methyl parathion. The low limits of detection were evaluated to be 9.0 nM for paraoxon, 10nM for parathion and 15 nM for methyl parathion (S/N=3). Thus, a highly specific, sensitive and rapid microbial biosensor was established, which holds great promise for on-site detection of trace p-nitrophenyl-substituted OPs.
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Affiliation(s)
- Xiangjiang Tang
- Laboratory for Biosensing, Qingdao Institute of Bioenergy & Bioprocess Technology, and Key Laboratory of Bioenergy, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266101, China, and University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Tingting Zhang
- Laboratory for Biosensing, Qingdao Institute of Bioenergy & Bioprocess Technology, and Key Laboratory of Bioenergy, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266101, China, and University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China; College of Chemistry and Chemical Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China
| | - Bo Liang
- Laboratory for Biosensing, Qingdao Institute of Bioenergy & Bioprocess Technology, and Key Laboratory of Bioenergy, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266101, China, and University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Dongfei Han
- Laboratory for Biosensing, Qingdao Institute of Bioenergy & Bioprocess Technology, and Key Laboratory of Bioenergy, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266101, China, and University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Lingxing Zeng
- Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Cheng Zheng
- Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Tie Li
- College of Chemistry and Chemical Engineering, Ocean University of China, 238 Songling Road, Qingdao 266100, China
| | - Mingdeng Wei
- Institute of Advanced Energy Materials, Fuzhou University, Fuzhou, Fujian 350002, China
| | - Aihua Liu
- Laboratory for Biosensing, Qingdao Institute of Bioenergy & Bioprocess Technology, and Key Laboratory of Bioenergy, Chinese Academy of Sciences, 189 Songling Road, Qingdao 266101, China, and University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
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Tang X, Liang B, Yi T, Manco G, Palchetti I, Liu A. Cell surface display of organophosphorus hydrolase for sensitive spectrophotometric detection of p-nitrophenol substituted organophosphates. Enzyme Microb Technol 2014; 55:107-12. [PMID: 24411452 DOI: 10.1016/j.enzmictec.2013.10.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 10/18/2013] [Accepted: 10/20/2013] [Indexed: 11/23/2022]
Abstract
Organophosphates (OPs) widely exist in ecosystem as toxic substances, for which sensitive and rapid analytical methods are highly requested. In the present work, by using N-terminal of ice nucleation protein (INP) as anchoring motif, a genetically engineered Escherichia coli (E. coli) strain surface displayed mutant organophosphorus hydrolase (OPH) (S5) with improved enzyme activity was successfully constructed. The surface location of INP-OPH fusion was confirmed by SDS-PAGE analysis and enzyme activity assays. The OPH-displayed bacteria facilitate the hydrolysis of p-nitrophenol (PNP) substituted organophosphates to generate PNP, which can be detected spectrometrically at 410 nm. Over 90% of the recombinant protein present on the surface of microbes demonstrated enhanced enzyme activity and long-term stability. The OPH activity of whole cells was 2.16 U/OD₆₀₀ using paraoxon as its substrate, which is the highest value reported so far. The optimal temperature for OPH activity was around 55 °C, and suspended cultures retained almost 100% of its activity over a period of one month at room temperature, exhibiting the better stability than free OPH. The recombinant E. coli strain could be employed as a whole-cell biocatalyst for detecting PNP substituted OPs at wider ranges and lower detection limits. Specifically, the linear ranges of the calibration curves were 0.5-150 μM paraoxon, 1-200 μM parathion and 2.5-200 μM methyl parathion, and limits of detection were 0.2 μM, 0.4 μM and 1 μM for paraoxon, parathion and methyl parathion, respectively (S/N=3). These results indicate that the engineered OPH strain is a promising multifunctional bacterium that could be used for further large-scale industrial and environmental applications.
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Chungjatupornchai W, Fa-Aroonsawat S. The rrnA promoter as a tool for the improved expression of heterologous genes in cyanobacteria. Microbiol Res 2013; 169:361-8. [PMID: 24140155 DOI: 10.1016/j.micres.2013.09.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 08/02/2013] [Accepted: 09/15/2013] [Indexed: 11/28/2022]
Abstract
The regulatory sequence of ribosomal RNA A (rrnA) operon from Synechococcus PCC7942 was characterized using green fluorescent protein gene (gfp) as a reporter. The PR promoter (nt. -83 to +2) including upstream promoter element and P1 promoter of rrnA exhibited GFP fluorescence intensity about 30-fold higher than full length sequence (nt. -147 to +79). The effects of PR promoter arranged in tandem with consensus-σ(70) promoter (PS) of Escherichia coli on the expression of gfp and opd gene encoding organophosphorus hydrolase (OPH) in Synechococcus were investigated. The PS-PR tandem promoter was superior to all of the other promoters; its GFP fluorescence intensity was a 1.8-fold increase when compared to PR-PR tandem promoter, a 2.5-fold, 9.5-fold and a 15-fold increase compared to PR, PS and promoter of tRNA(pro), respectively. The GFP from PS-PR tandem promoter accounted for about 12% of its total extracted proteins. OPH activity of Synechococcus harboring opd gene under the control of PS-PR tandem promoter was 738 ± 128 units/OD₇₃₀. We demonstrated that the tandem promoters remarkably enhanced the GFP and OPH production which were detected on SDS-PAGE stained with Coomassie blue. The promoter system in this study could be generally applied to production of valuable organic products from cyanobacteria.
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Affiliation(s)
- Wipa Chungjatupornchai
- Institute of Molecular Biosciences, Mahidol University, Salaya Campus, Nakornpathom 73170, Thailand.
| | - Sirirat Fa-Aroonsawat
- Institute of Molecular Biosciences, Mahidol University, Salaya Campus, Nakornpathom 73170, Thailand
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