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Zheng K, Yu Z, Li Y, Liu C. Cd 2+ enhancing the bromination of bisphenol A in Brassica chinensis L.: Pathways and mechanisms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:174013. [PMID: 38880131 DOI: 10.1016/j.scitotenv.2024.174013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024]
Abstract
Traditional heavy metal pollution, such as cadmium, impacts the transformation and risks of bisphenol pollutants (like bisphenol A, BPA), in plants, especially due to the ubiquitous presence of bromide ion. Although it has been discovered that the bromination of phenolic pollutants occurs in plants, thereby increasing the associated risks, the influence and mechanisms of bromination under complex contamination conditions involving both heavy metals and phenolic compounds remain poorly understood. This study addresses the issue by exposing Brassica chinensis L. to cadmium ion (Cd2+, 25-100 μM), with the hydroponic solution containing BPA (15 mg/L) and bromide ion (0.5 mM) in this work. It was observed that Cd2+ primarily enhanced the bromination of BPA by elevating the levels of reactive oxygen species (ROS) and the activity of peroxidase (POD) in Brassica chinensis L. The variety of bromination products within Brassica chinensis L. increased as the concentration of Cd2+ rose from 25 to 100 μM. The substitution positions of bromine were determined using Gaussian calculations and mass spectrometry analysis. The toxicity of bromination products derived from BPA was observed to increase based on Ecological Structure-Activity Relationships analysis and HepG2 cytotoxicity assays. This study provides new insights into the risks and health hazards associated with cadmium pollution, particularly its role in enhancing the bromination of bisphenol pollutants in plants.
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Affiliation(s)
- Kai Zheng
- School of Environmental Science and Engineering, Shandong Key Laboratory of Environmental Processes and Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Zelian Yu
- School of Environmental Science and Engineering, Shandong Key Laboratory of Environmental Processes and Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Yujiang Li
- School of Environmental Science and Engineering, Shandong Key Laboratory of Environmental Processes and Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Chunguang Liu
- School of Environmental Science and Engineering, Shandong Key Laboratory of Environmental Processes and Health, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China; Laboratory of Marine Ecological Environment in Universities of Shandong, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China; Qingdao Key Laboratory of Marine Pollutant Prevention, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China; Shandong Kenli Petrochemical Group Co., Ltd., No. 1001 Shengxing Road, Kenli District, Dongying City, Shandong Province, China.
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2
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Ahmad MS, Shah N, Akbar Z, Khan T, Ali A. Simple two-step purification and characterisation of peroxidase from Citrullus colocynthis. Nat Prod Res 2024; 38:3374-3383. [PMID: 37621192 DOI: 10.1080/14786419.2023.2248644] [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: 05/10/2023] [Revised: 07/20/2023] [Accepted: 08/09/2023] [Indexed: 08/26/2023]
Abstract
Peroxidase is a biotechnologically important enzyme. The purification of peroxidase from the root of Citrullus colocynthis was carried out in a simple two-step process with maximum purity level. The sample was extracted in a high salt buffer, and the enzyme was partially purified with a Q-Sepharose anion exchange column. Final purification was carried out with HighLoad 16/600 Superdex G-75 column. The purified protein was analysed with SDS gel electrophoresis, which suggested a single band of approximately 35 kDa. Further, the enzyme was identified with the help of Mass spectrometric analysis using an ESI-QTOF Mass spectrometer. The study will be helpful for the isolation and its commercial uses in biotechnology.
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Affiliation(s)
- Malik Shoaib Ahmad
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Nayab Shah
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Zeeshan Akbar
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Tajwali Khan
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
| | - Arslan Ali
- Dr. Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, Pakistan
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3
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Bilal M, Singh AK, Iqbal HMN, Zdarta J, Chrobok A, Jesionowski T. Enzyme-linked carbon nanotubes as biocatalytic tools to degrade and mitigate environmental pollutants. ENVIRONMENTAL RESEARCH 2024; 241:117579. [PMID: 37944691 DOI: 10.1016/j.envres.2023.117579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/21/2023] [Accepted: 11/01/2023] [Indexed: 11/12/2023]
Abstract
A wide array of organic compounds have been recognized as pollutants of high concern due to their controlled or uncontrolled presence in environmental matrices. The persistent prevalence of diverse organic pollutants, including pharmaceutical compounds, phenolic compounds, synthetic dyes, and other hazardous substances, necessitates robust measures for their practical and sustainable removal from water bodies. Several bioremediation and biodegradation methods have been invented and deployed, with a wide range of materials well-suited for diverse environments. Enzyme-linked carbon-based materials have been considered efficient biocatalytic platforms for the remediation of complex organic pollutants, mostly showing over 80% removal efficiency of micropollutants. The advantages of enzyme-linked carbon nanotubes (CNTs) in enzyme immobilization and improved catalytic potential may thus be advantageous for environmental research considering the current need for pollutant removal. This review outlines the perspective of current remediation approaches and highlights the advantageous features of enzyme-linked CNTs in the removal of pollutants, emphasizing their reusability and stability aspects. Furthermore, different applications of enzyme-linked CNTs in environmental research with concluding remarks and future outlooks have been highlighted. Enzyme-linked CNTs serve as a robust biocatalytic platform for the sustainability agenda with the aim of keeping the environment clean and safe from a variety of organic pollutants.
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Affiliation(s)
- Muhammad Bilal
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965, Poznan, Poland; Department of Sanitary Engineering, Faculty of Civil and Environmental Engineering, Gdansk University of Technology, G. Narutowicza 11/12 Str., 80-233, Gdansk, Poland; Advanced Materials Center, Gdansk University of Technology, 11/12 Narutowicza St., 80-233, Gdansk, Poland.
| | - Anil Kumar Singh
- Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico; Institute of Advanced Materials for Sustainable Manufacturing, Tecnologico de Monterrey, Monterrey, 64849, Mexico
| | - Jakub Zdarta
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965, Poznan, Poland
| | - Anna Chrobok
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100, Gliwice, Poland
| | - Teofil Jesionowski
- Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965, Poznan, Poland.
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4
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Yadoung S, Shimizu S, Hongsibsong S, Nakano K, Ishimatsu R. Dopamine as a polymerizable reagent for enzyme-linked immunosorbent assay using horseradish peroxidase. Heliyon 2023; 9:e21722. [PMID: 38027909 PMCID: PMC10654240 DOI: 10.1016/j.heliyon.2023.e21722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023] Open
Abstract
We demonstrate that dopamine can be used as a reagent for colorimetric enzyme-linked immunosorbent assay (ELISA) using horseradish peroxidase (HRP). Dopamine was able to be polymerized in the presence of HRP and H2O2, and black polydopamine was obtained after the enzymatic reaction. Because of the black color, the absorbance was significantly changed in the whole range of the visible light region. Here, an indirect competitive ELISA based on the polymerization of dopamine was performed to detect a fluoroquinolone antibiotic, enrofloxacin. The antibiotic is commonly used in livestock farming. The anti-antibiotics antibody was produced from egg yolk from chicken hens. In the visible range, sufficient absorbance changes of ∼0.4∼0.5 and a low background level for the ELISA response were obtained, and the 50 % inhibitory concentration value at 450 nm was determined to be 26 ppb. The performance of the indirect competitive ELISA based on the polymerization of dopamine was compared to that based on the oxidation of catechol because dopamine has a catechol skeleton. By the complex of HRP and H2O2, catechol can be oxidized to o-benzoquinone having a maximum absorption wavelength of 420 nm. It was shown that the absorbance change in the case of polydopamine was about 2.5 times higher than that of catechol, where the background levels were similar. This confirms that the polymerization of dopamine significantly enhanced the photosignal.
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Affiliation(s)
- Sumed Yadoung
- Environmental Science Program, Faculty of Science, Chiang Mai University, 50200, Thailand
| | - Shinichi Shimizu
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Surat Hongsibsong
- Environmental Science Program, Faculty of Science, Chiang Mai University, 50200, Thailand
- School of Health Sciences Research, Research Institute for Health Science, Chiang Mai University, Chiang Mai, 50200, Thailand
- Environmental, Occupational Health Sciences and Non-Communicable Diseases Center of Excellence, Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Ryoichi Ishimatsu
- Department of Applied Physics, University of Fukui, 3-9-1 Bunkyo, Fukui, 910-8507, Japan
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5
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Aktar MS, de Serrano V, Ghiladi R, Franzen S. Comparative study of the binding and activation of 2,4-dichlorophenol by dehaloperoxidase A and B. J Inorg Biochem 2023; 247:112332. [PMID: 37480762 DOI: 10.1016/j.jinorgbio.2023.112332] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/11/2023] [Accepted: 07/14/2023] [Indexed: 07/24/2023]
Abstract
The dehaloperoxidase-hemoglobin (DHP), first isolated from the coelom of a marine terebellid polychaete, Amphitrite ornata, is an example of a multi-functional heme enzyme. Long known for its reversible oxygen (O2) binding, further studies have established DHP activity as a peroxidase, oxidase, oxygenase, and peroxygenase. The specific reactivity depends on substrate binding at various internal and external binding sites. This study focuses on comparison of the binding and reactivity of the substrate 2,4-dichlorophenol (DCP) in the isoforms DHPA and B. There is strong interest in the degradation of DCP because of its wide use in the chemical industry, presence in waste streams, and particular reactivity to form dioxins, some of the most toxic compounds known. The catalytic efficiency is 3.5 times higher for DCP oxidation in DHPB than DHPA by a peroxidase mechanism. However, DHPA and B both show self-inhibition even at modest concentrations of DCP. This phenomenon is analogous to the self-inhibition of 2,4,6-trichlorophenol (TCP) at higher concentration. The activation energies of the electron transfer steps in DCP in DHPA and DHPB are 19.3 ± 2.5 and 24.3 ± 3.2 kJ/mol, respectively, compared to 37.2 ± 6.5 kJ/mol in horseradish peroxidase (HRP), which may be a result of the more facile electron transfer of an internally bound substrate in DHPA. The x-ray crystal structure of DHPA bound with DCP determined at 1.48 Å resolution, shows tight substrate binding inside the heme pocket of DHPA (PDB 8EJN). This research contributes to the studies of DHP as a naturally occurring bioremediation enzyme capable of oxidizing a wide range of environmental pollutants.
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Affiliation(s)
- Mst Sharmin Aktar
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, United States of America
| | - Vesna de Serrano
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, United States of America
| | - Reza Ghiladi
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, United States of America
| | - Stefan Franzen
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, United States of America.
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6
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Jäger C, Gregori BJ, Aho JAS, Hallamaa M, Deska J. Peroxidase-induced C-N bond formation via nitroso ene and Diels-Alder reactions. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2023; 25:3166-3174. [PMID: 37113763 PMCID: PMC10124104 DOI: 10.1039/d2gc04827b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/07/2023] [Indexed: 06/19/2023]
Abstract
The formation of new carbon-nitrogen bonds is indisputably one of the most important tasks in synthetic organic chemistry. Here, nitroso compounds offer a highly interesting reactivity that complements traditional amination strategies, allowing for the introduction of nitrogen functionalities via ene-type reactions or Diels-Alder cycloadditions. In this study, we highlight the potential of horseradish peroxidase as biological mediator for the generation of reactive nitroso species under environmentally benign conditions. Exploiting a non-natural peroxidase reactivity, in combination with glucose oxidase as oxygen-activating biocatalyst, aerobic activation of a broad range of N-hydroxycarbamates and hydroxamic acids is achieved. Thus both intra- and intermolecular nitroso-ene as well as nitroso-Diels-Alder reactions are performed with high efficiency. Relying on a commercial and robust enzyme system, the aqueous catalyst solution can be recycled over numerous reaction cycles without significant loss of activity. Overall, this green and scalable C-N bond-forming strategy enables the production of allylic amides and various N-heterocyclic building blocks utilizing only air and glucose as sacrificial reagents.
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Affiliation(s)
- Christina Jäger
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland https://www.deskalab.com
| | - Bernhard J Gregori
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland https://www.deskalab.com
- Institut für Anorganische und Angewandte Chemie Martin-Luther-King-Platz 6 20146 Hamburg Germany
| | - Juhana A S Aho
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland https://www.deskalab.com
| | - Marleen Hallamaa
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland https://www.deskalab.com
| | - Jan Deska
- Department of Chemistry, University of Helsinki A.I. Virtasen aukio 1 00560 Helsinki Finland https://www.deskalab.com
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7
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Chen X, Qi Y, He B, Liang Y, Lei Y, Sun J. Fabrication of Adjustable Au/Carbon Hybrid Nanozymes with Photothermally Enhanced Peroxidase Activity and Ultra-sensitivity for Glutathione Detection. ACS APPLIED MATERIALS & INTERFACES 2023; 15:20788-20799. [PMID: 37071845 DOI: 10.1021/acsami.3c02420] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Au nanozymes are extensively researched for their photothermal effect and catalytic performance, but overcoming the inherent defects of poor dispersibility and thermal stability through complementary materials will expand their prospects for biological applications. Herein, several novel CAu nanozymes were fabricated by in situ reduction of chloroauric acid on hollow carbon nanospheres (HCNs). Through regulating the number of reductions, sesame ball-shaped CAu (sCAu) with highly dispersed Au nanoparticles and diversity-shaped CAu (dCAu) were obtained. The number and morphology of loaded Au nanoparticles, absorption spectra, and hydrophilicity of CAu nanozymes were systematically characterized to demonstrate the flexibility of this novel method. The high-efficiency peroxidase-like sCAu0.3 nanozyme with hyperthermia-activated property was then screened for later bio-application. It is worth mentioning that its photothermal-promoted peroxidase-like activity could be achieved under near-infrared laser irradiation. Moreover, sCAu0.3 could specifically achieve glutathione detection in human blood samples. This method will provide a protocol for the regulation of CAu nanozymes to adapt to bio-detection applications.
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Affiliation(s)
- Xinyan Chen
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Yu Qi
- China Meat Research Center, Beijing 100068, PR China
| | - Bin He
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Yu Liang
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Yu Lei
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Jian Sun
- Key Laboratory of Molecular Medicine and Biotherapy in the Ministry of Industry and Information Technology, School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, PR China
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8
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Wang J, Yang J, Huang W, Huang W, Jia R. A mutant R70V/E166A of short manganese peroxidase showing Mn 2+-independent dye decolorization. Appl Microbiol Biotechnol 2023; 107:2303-2319. [PMID: 36843195 DOI: 10.1007/s00253-023-12438-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 02/02/2023] [Accepted: 02/07/2023] [Indexed: 02/28/2023]
Abstract
Il-MnP1, a short-type manganese peroxidase from Irpex lacteus F17, can oxidize some substrates in the absence of Mn2+, but the catalysis was much lower than in the presence of Mn2+. Here, we report a mutant R70V/E166A of Il-MnP1 with some unique properties, which possessed clearly higher catalysis for the decolorization of anthraquinone and azo dyes in the absence of Mn2+ than that of Il-MnP1. Importantly, the optimum pH of R70V/E166A for decolorization of anthraquinone dyes (Reactive Blue 19, RB19) was 6.5, and the mutant achieved high decolorization activities in the range of pH 4.0-7.0, whereas Il-MnP1 only showed decolorization for RB19 at pH 3.5-4.0. In addition, the optimum H2O2 concentration of R70V/E166A for RB19 decolorization was eight times that of Il-MnP1 and the H2O2 stability has improved 1.4 times compared with Il-MnP1. Furthermore, Mn2+ competitively inhibited the oxidation of RB19 by R70V/E166A, explaining the higher catalytic activity of the mutant R70V/E166A in the absence of Mn2+. Molecular docking results suggested that RB19 binds to the distal side of the heme plane in mutant R70V/E166A, which extended from the heme δ-side to the heme γ-side, and close to the mutated residues of R70V and E166A, whereas RB19 could not access the heme pocket of Il-MnP1 due to the steric hindrance of the side-chain group of Arg 70. Thus, this study constructed a useful mutant R70V/E166A and analyzed its higher Mn2+-independent activity, which is very important for better understanding the Mn2+-independent catalytic mechanism for short manganese peroxidases. KEY POINTS: • The mutant R70V/E166A of atypical MnP1 of I. lacteus F17 shows unique catalytic properties. • At pH 6.5, the R70V/E166A had a strong ability to decolorize anthraquinone dyes in the absence of Mn2+. • The binding sites of Reactive Blue 19 in mutant R70V/E166A were elucidated.
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Affiliation(s)
- Junli Wang
- School of Life Science, Anhui University, 111 Jiulong Road, Economic and Technology Development Zone, Hefei, Anhui Province, People's Republic of China, 230601
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui Province, China
| | - Jun Yang
- School of Life Science, Anhui University, 111 Jiulong Road, Economic and Technology Development Zone, Hefei, Anhui Province, People's Republic of China, 230601
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui Province, China
| | - Wenhan Huang
- School of Life Science, Anhui University, 111 Jiulong Road, Economic and Technology Development Zone, Hefei, Anhui Province, People's Republic of China, 230601
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui Province, China
| | - Wenting Huang
- School of Life Science, Anhui University, 111 Jiulong Road, Economic and Technology Development Zone, Hefei, Anhui Province, People's Republic of China, 230601
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui Province, China
| | - Rong Jia
- School of Life Science, Anhui University, 111 Jiulong Road, Economic and Technology Development Zone, Hefei, Anhui Province, People's Republic of China, 230601.
- Anhui Key Laboratory of Modern Biomanufacturing, Anhui University, Hefei, Anhui Province, China.
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9
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Zhang B, Lewis JA, Kovacs F, Sattler SE, Sarath G, Kang C. Activity of Cytosolic Ascorbate Peroxidase (APX) from Panicum virgatum against Ascorbate and Phenylpropanoids. Int J Mol Sci 2023; 24:1778. [PMID: 36675291 PMCID: PMC9864165 DOI: 10.3390/ijms24021778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/10/2023] [Accepted: 01/12/2023] [Indexed: 01/19/2023] Open
Abstract
APX is a key antioxidant enzyme in higher plants, scavenging H2O2 with ascorbate in several cellular compartments. Here, we report the crystal structures of cytosolic ascorbate peroxidase from switchgrass (Panicum virgatum L., Pvi), a strategic feedstock plant with several end uses. The overall structure of PviAPX was similar to the structures of other APX family members, with a bound ascorbate molecule at the ɣ-heme edge pocket as in other APXs. Our results indicated that the H2O2-dependent oxidation of ascorbate displayed positive cooperativity. Significantly, our study suggested that PviAPX can oxidize a broad range of phenylpropanoids with δ-meso site in a rather similar efficiency, which reflects its role in the fortification of cell walls in response to insect feeding. Based on detailed structural and kinetic analyses and molecular docking, as well as that of closely related APX enzymes, the critical residues in each substrate-binding site of PviAPX are proposed. Taken together, these observations shed new light on the function and catalysis of PviAPX, and potentially benefit efforts improve plant health and biomass quality in bioenergy and forage crops.
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Affiliation(s)
- Bixia Zhang
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Jacob A. Lewis
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA
| | - Frank Kovacs
- Chemistry Department, University of Nebraska-Kearney, Kearney, NE 68849, USA
| | - Scott E. Sattler
- Wheat, Sorghum and Forage Research Unit, U.S. Department of Agriculture—Agricultural Research Service, Lincoln, NE 68583, USA
| | - Gautam Sarath
- Wheat, Sorghum and Forage Research Unit, U.S. Department of Agriculture—Agricultural Research Service, Lincoln, NE 68583, USA
| | - ChulHee Kang
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA
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10
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Oxidation of dobutamine and dopamine by horseradish peroxidase. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Sellami K, Couvert A, Nasrallah N, Maachi R, Abouseoud M, Amrane A. Peroxidase enzymes as green catalysts for bioremediation and biotechnological applications: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150500. [PMID: 34852426 DOI: 10.1016/j.scitotenv.2021.150500] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/16/2021] [Accepted: 09/17/2021] [Indexed: 05/16/2023]
Abstract
The fast-growing consumer demand drives industrial process intensification, which subsequently creates a significant amount of waste. These products are discharged into the environment and can affect the quality of air, degrade water streams, and alter soil characteristics. Waste materials may contain polluting agents that are especially harmful to human health and the ecosystem, such as the synthetic dyes, phenolic agents, polycyclic aromatic hydrocarbons, volatile organic compounds, polychlorinated biphenyls, pesticides and drug substances. Peroxidases are a class oxidoreductases capable of performing a wide variety of oxidation reactions, ranging from reactions driven by radical mechanisms, to oxygen insertion into CH bonds, and two-electron substrate oxidation. This versatility in the mode of action presents peroxidases as an interesting alternative in cleaning the environment. Herein, an effort has been made to describe mechanisms governing biochemical process of peroxidase enzymes while referring to H2O2/substrate stoichiometry and metabolite products. Plant peroxidases including horseradish peroxidase (HRP), soybean peroxidase (SBP), turnip and bitter gourd peroxidases have revealed notable biocatalytic potentialities in the degradation of toxic products. On the other hand, an introduction on the role played by ligninolytic enzymes such as manganese peroxidase (MnP) and lignin peroxidase (LiP) in the valorization of lignocellulosic materials is addressed. Moreover, sensitivity and selectivity of peroxidase-based biosensors found use in the quantitation of constituents and the development of diagnostic kits. The general merits of peroxidases and some key prospective applications have been outlined as concluding remarks.
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Affiliation(s)
- Kheireddine Sellami
- Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, Bab Ezzouar, Alger 16111, Algeria; Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France.
| | - Annabelle Couvert
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
| | - Noureddine Nasrallah
- Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, Bab Ezzouar, Alger 16111, Algeria
| | - Rachida Maachi
- Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, Bab Ezzouar, Alger 16111, Algeria
| | - Mahmoud Abouseoud
- Laboratoire de Génie de la Réaction, Faculté de Génie Mécanique et Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene, Bab Ezzouar, Alger 16111, Algeria; Laboratoire de Biomatériaux et Phénomènes de Transport, Faculté des Sciences et de la Technologie, Université Yahia Fares de Médéa, Pôle Universitaire, RN1, Médéa 26000, Algeria
| | - Abdeltif Amrane
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, F-35000 Rennes, France
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12
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Bhapkar S, Kumbhar N, Sharma P, Jagtap S, Gacche R, Barvkar VT, Sonune D, Sonawane KD, Jadhav U. Self-assembly of soybean peroxidase nanohybrid for activity enhancement and dye decolorization: experimental and computational studies. J Biomol Struct Dyn 2021; 40:12739-12749. [PMID: 34550842 DOI: 10.1080/07391102.2021.1975566] [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: 05/25/2021] [Accepted: 08/29/2021] [Indexed: 12/27/2022]
Abstract
The soybean peroxidase (SBP) mediated nanohybrid [SBP-Cu3(PO4)2·3H2O] synthesis was carried out in the present study. The scanning electron microscopy (SEM) analysis showed a characteristic flower-like hierarchical structure of the SBP-nanohybrid. The mechanism of SBP-nanohybrid formation was elucidated using computational approaches. The predicted Cu2+ binding sites followed by molecular docking studies showed the two lowest energy (-4.4 kcal/mol and -3.56 kcal/mol) Cu2+ binding sites. These two binding sites are located at the opposite position and might be involved in the formation of SBP-nanohybrid assemblies. Further, these sites are different than the catalytic active site pocket of SBP, and may facilitate more substrate catalysis. Obtained computational results were confirmed by in-vitro guaiacol oxidations studies using SBP-nanohybrid. The effect of various parameters on SBP-nanohybrid activity was studied. The pH 7.2 was found optimum for SBP-nanohybrid activity. The enzyme activity increased with an increase in temperature up to 50 °C temperature and then decreased with an increase in temperature. Around ∼138% enhanced activity was recorded using SBP-nanohybrid compared to crude SBP. Also, the SBP-nanohybrid showed around 95% decolorization of methylene blue (MB) in 1 h and the MB degradation was confirmed by high-pressure liquid chromatography analysis (HPLC).Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sunil Bhapkar
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Navanath Kumbhar
- Department of Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Praful Sharma
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Shweta Jagtap
- Department of Instrumentation Science, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Rajesh Gacche
- Department of Biotechnology, Savitribai Phule Pune University, Pune, Maharashtra, India
| | - Vitthal T Barvkar
- Department of Botany, Savitribai Phule Pune University, Pune, Maharashtra, India
| | | | - Kailas D Sonawane
- Department of Biochemistry, Shivaji University, Kolhapur, Maharashtra, India
| | - Umesh Jadhav
- Department of Microbiology, Savitribai Phule Pune University, Pune, Maharashtra, India
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13
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Kessler A, Hedberg J, McCarrick S, Karlsson HL, Blomberg E, Odnevall I. Adsorption of Horseradish Peroxidase on Metallic Nanoparticles: Effects on Reactive Oxygen Species Detection Using 2',7'-Dichlorofluorescin Diacetate. Chem Res Toxicol 2021; 34:1481-1495. [PMID: 33856197 PMCID: PMC8220500 DOI: 10.1021/acs.chemrestox.0c00430] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Indexed: 11/28/2022]
Abstract
The fluorescent probe 2',7'-dichlorofluorescein diacetate (DCFH-DA) together with the enzyme horseradish peroxidase (HRP) is widely used in nanotoxicology to study acellular reactive oxygen species (ROS) production from nanoparticles (NPs). This study examined whether HRP adsorbs onto NPs of Mn, Ni, and Cu and if this surface process influences the extent of metal release and hence the ROS production measurements using the DCFH assay in phosphate buffered saline (PBS), saline, or Dulbecco's modified Eagle's medium (DMEM). Adsorption of HRP was evident onto all NPs and conditions, except for Mn NPs in PBS. The presence of HRP resulted in an increased release of copper from the Cu NPs in PBS and reduced levels of nickel from the Ni NPs in saline. Both metal ions in solution and the adsorption of HRP onto the NPs can change the activity of HRP and thus influence the ROS results. The effect of HRP on the NP reactivity was shown to be solution chemistry dependent. Most notable was the evident affinity/adsorption of phosphate toward the metal NPs, followed by a reduced adsorption of HRP, the concomitant reduction in released manganese from the Mn NPs, and increased levels of released metals from the Cu NPs in PBS. Minor effects were observed for the Ni NPs. The solution pH should be monitored since the release of metals can change the solution pH and the activity of HRP is known to be pH-dependent. It is furthermore essential that solution pH adjustments are made following the addition of NaOH during diacetyl removal of DCFH-DA. Even though not observed for the given exposure conditions of this study, released metal ions could possibly induce agglomeration or partial denaturation of HRP, which in turn could result in steric hindrance for H2O2 to reach the active site of HRP. This study further emphasizes the influence of HRP on the background kinetics, its solution dependence, and effects on measured ROS signals. Different ways of correcting for the background are highlighted, as this can result in different interpretations of generated results. The results show that adsorption of HRP onto the metal NPs influenced the extent of metal release and may, depending on the investigated system, result in either under- or overestimated ROS signals if used together with the DCFH assay. HRP should hence be used with caution when measuring ROS in the presence of reactive metallic NPs.
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Affiliation(s)
- Amanda Kessler
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
| | - Jonas Hedberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
| | - Sarah McCarrick
- Institute
of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Hanna L. Karlsson
- Institute
of Environmental Medicine, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Eva Blomberg
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
- RISE
Research Institute of Sweden, Division Bioeconomy
and Health, Material and Surface Design, Box 5604, SE-114 86 Stockholm, Sweden
| | - Inger Odnevall
- KTH
Royal Institute of Technology, Department of Chemistry, Division of Surface and Corrosion Science, 100 44 Stockholm, Sweden
- AIMES
- Center for the Advancement of Integrated Medical and Engineering
Sciences at Karolinska Institutet and KTH Royal Institute of Technology, 169 27 Stockholm, Sweden
- Department
of Neuroscience, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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14
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Cui X, Wang K, Wang T, Li J, Li C, Wang W, Wang H, Wang Z. Crystal Structure Analysis of Cationic Peroxidase from Proso Millet and Identification of Its Phosphatase Active Sites. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6251-6259. [PMID: 34044543 DOI: 10.1021/acs.jafc.1c01606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Proso millet peroxidase (PmPOD) belongs to class III plant peroxidases, which are enzymes typically characterized by their heme coenzymes. PmPOD exhibits not only heme-dependent peroxidase activity but also heme-independent phosphatase activity. Crystal structure analysis and sequence alignment showed that PmPOD contained a phosphatase catalytic loop CXXXXXR in its β-domain that is similar to the active site of a dual-specific phosphatase. Recombinant truncated proso millet peroxidase (tPmPOD), which contained only a conserved catalytic loop CXXXXXR of phosphatase, was found to exhibit phosphatase activity. Five tPmPOD mutants containing five different mutations in the phosphatase active sites exhibited significantly lower phosphatase activity compared to that of tPmPOD, indicating that the five amino acids play important roles in the phosphatase activity of tPmPOD. Finally, nucleophilic amino acid Cys192 formed a disulfide bond with Cys219 to protect the stability of a sulfhydryl group; thus, it may play a decisive role in the phosphatase activity of PmPOD.
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Affiliation(s)
- Xiaodong Cui
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan030006, China
| | - Ke Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan030006, China
| | - Tingfen Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan030006, China
| | - Jiao Li
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Chen Li
- School of Life Science, Shanxi University, Taiyuan 030006, China
| | - Wenming Wang
- Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Hongfei Wang
- Institute of Molecular Science, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Zhuanhua Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Biotechnology, Shanxi University, Taiyuan030006, China
- School of Life Science, Shanxi University, Taiyuan 030006, China
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15
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Lin YW. Biodegradation of aromatic pollutants by metalloenzymes: A structural-functional-environmental perspective. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213774] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Ravanfar R, Abbaspourrad A. Monitoring the heme iron state in horseradish peroxidase to detect ultratrace amounts of hydrogen peroxide in alcohols. RSC Adv 2021; 11:9901-9910. [PMID: 35423493 PMCID: PMC8695524 DOI: 10.1039/d1ra00733e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 02/26/2021] [Indexed: 11/21/2022] Open
Abstract
Despite the importance of hydrogen peroxide (H2O2) in initiating oxidative damage and its connection to various diseases, the detection of low concentrations of H2O2 (<10 μM) is still limited using current methods, particularly in non-aqueous systems. One of the most common methods is based on examining the color change of a reducing substrate upon oxidation using UV/Vis spectrophotometry, fluorophotometry and/or paper test strips. In this study, we show that this method encounters low efficiency and sensitivity for detection of ultratrace amounts of H2O2 in non-aqueous media. Thus, we have developed a simple, fast, accurate and inexpensive method based on UV/Vis spectrophotometry to detect H2O2 in non-aqueous systems, such as alcohols. In this regard, we demonstrate that monitoring the Soret and Q-band regions of high-valent iron-oxo (ferryl heme) intermediates in horseradish peroxidase (HRP) is well suited to detect ultratrace amounts of H2O2 impurities in alcohols in the range of 0.001-1000 μM using UV/Vis spectrophotometry. We monitor the optical spectra of HRP solution for the red shift in the Soret and Q-band regions upon the addition of alcohols with H2O2 impurity. We also monitor the reversibility of this shift to the original wavelength over time to check the spontaneous decay of ferryl intermediates to the ferric state. Thus, we have found that the ferryl intermediates of HRP can be used for the detection of H2O2 in alcohols at μg L-1 levels through via UV/Vis spectrophotometric method.
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17
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Bretz RR, de Castro AA, Lara Ferreira IF, Ramalho TC, Silva MC. Experimental and theoretical affinity and catalysis studies between halogenated phenols and peroxidases: Understanding the bioremediation potential. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 202:110895. [PMID: 32615496 DOI: 10.1016/j.ecoenv.2020.110895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
Halogenated phenols, such as 2,4-dichlorophenol (2,4-DCP) and 4-bromophenol (4-BP) are pollutants generated by a various industrial sectors like chemical, dye, paper bleaching, pharmaceuticals or in an agriculture as pesticides. The use of Horseradish peroxidase (HRP) in the halogenated phenols treatment has already been mentioned, but it is not well understood how the different phenolic substrates can bind in the peroxidase active site nor how these specific interactions can influence in the bioremediation potential. In this work, different removal efficiencies were obtained for phenolic compounds investigated using HRP as catalyst (93.87 and 59.19% to 4BP and 2,4 DCP, respectively). Thus, to rationalize this result based on the interactions of phenols with active center of HRP, we combine computational and experimental methodologies. The theoretical approaches utilized include density functional theory (DFT) calculations, docking simulation and quantum mechanics/molecular mechanics (QM/MM) technique. Michaelis Menten constant (Km) obtained through experimental methodologies were 2.3 and 0.95 mM to 2,4-DCP and 4-BP, respectively, while the specificity constant (Kcat/Km) found was 1.44 mM-1 s-1 and 0.62 mM-1 s-1 for 4-BP and 2,4-DCP, respectively. The experimental parameters appointed to the highest affinity of HRP to 4-BP. According to the molecular docking calculations, both ligands have shown stabilizing intermolecular interaction energies within the HRP active site, however, the 4-BP showed more stabilizing interaction energy (-53.00 kcal mol-1) than 2,4-dichlorophenol (-49.23 kcal mol-1). Besides that, oxidative mechanism of 4-BP and 2,4-DCP was investigated by the hybrid QM/MM approach. This study showed that the lowest activation energy values for transition states investigated were obtained for 4-BP. Therefore, by theoretical approach, the compound 4-BP showed the more stabilizing interaction and activation energy values related to the interaction within the enzyme and the oxidative reaction mechanism, respectively, which corroborates with experimental parameters obtained. The combination between experimental and theoretical approaches was essential to understand how the degradation potential of the HRP enzyme depends on the interactions between substrate and the active center cavity of the enzyme.
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Affiliation(s)
- Raphael Resende Bretz
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil
| | | | - Igor F Lara Ferreira
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil
| | - Teodorico C Ramalho
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Maria Cristina Silva
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil.
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18
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Metal complexes that bind to the amyloid-β peptide of relevance to Alzheimer’s disease. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213255
expr 886172045 + 931245952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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19
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Gomes LM, Bataglioli JC, Storr T. Metal complexes that bind to the amyloid-β peptide of relevance to Alzheimer’s disease. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213255] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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20
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Influence of Varying Functionalization on the Peroxidase Activity of Nickel(II)–Pyridine Macrocycle Catalysts: Mechanistic Insights from Density Functional Theory. COMPUTATION 2020. [DOI: 10.3390/computation8020052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nickel(II) complexes of mono-functionalized pyridine-tetraazamacrocycles (PyMACs) are a new class of catalysts that possess promising activity similar to biological peroxidases. Experimental studies with ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), substrate) and H2O2 (oxidant) proposed that hydrogen-bonding and proton-transfer reactions facilitated by their pendant arm were responsible for their catalytic activity. In this work, density functional theory calculations were performed to unravel the influence of pendant arm functionalization on the catalytic performance of Ni(II)–PyMACs. Generated frontier orbitals suggested that Ni(II)–PyMACs activate H2O2 by satisfying two requirements: (1) the deprotonation of H2O2 to form the highly nucleophilic HOO−, and (2) the generation of low-spin, singlet state Ni(II)–PyMACs to allow the binding of HOO−. COSMO solvation-based energies revealed that the O–O Ni(II)–hydroperoxo bond, regardless of pendant arm type, ruptures favorably via heterolysis to produce high-spin (S = 1) [(L)Ni3+–O·]2+ and HO−. Aqueous solvation was found crucial in the stabilization of charged species, thereby favoring the heterolytic process over homolytic. The redox reaction of [(L)Ni3+–O·]2+ with ABTS obeyed a 1:2 stoichiometric ratio, followed by proton transfer to produce the final intermediate. The regeneration of Ni(II)–PyMACs at the final step involved the liberation of HO−, which was highly favorable when protons were readily available or when the pKa of the pendant arm was low.
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21
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Physical–chemical analysis and kinetics of the magnetic biocatalyst for 2,3,6,-trimethylphenol oxidation. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01762-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Xi J, Wei G, Wu Q, Xu Z, Liu Y, Han J, Fan L, Gao L. Light-enhanced sponge-like carbon nanozyme used for synergetic antibacterial therapy. Biomater Sci 2020; 7:4131-4141. [PMID: 31328742 DOI: 10.1039/c9bm00705a] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Bacterial infection and the issue of antibiotic resistance have become one of the major public health problems worldwide. Thus, searching for new antibacterial agents is urgently required. Hydrogen peroxide, H2O2, as a traditional bactericide, is applied widely for medical treatments. However, the relatively high concentration of H2O2 used in a clinical setting usually inhibits wound healing and even damages normal tissues during disinfection. Here, we synthesized N-doped sponge-like carbon spheres (N-SCSs), which showed excellent mimicking activities for multiple enzymes, including peroxidase, oxidase, superoxide dismutase, and catalase. We then utilized the peroxidase-like activity of the N-SCSs to convert low-concentration H2O2 into radical oxygen species to resist bacteria. The data showed that the antibacterial performance of H2O2 against Gram-negative bacteria (Escherichia coli), Gram-positive bacteria (Staphylococcus aureus), and multidrug-resistant bacteria was improved through the peroxidase-like catalytic reaction of N-SCSs. Importantly, besides generating heat against bacteria, near-infrared laser exposure also promoted the peroxidase activity of N-SCSs, to further generate radical oxygen species to kill bacteria. In addition, this catalytic-photothermal antibacterial strategy demonstrated accelerated recovery of infected wounds in an animal model. Thus, our work provides a new synergetic anti-infection strategy, and further expands the application of carbon-based nanozymes in biomedicine.
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Affiliation(s)
- Juqun Xi
- Institute of Translational Medicine, Department of Pharmacology, Medical College, Yangzhou University, Yangzhou 225001, Jiangsu, China.
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23
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Laurynėnas A, Butkevičius M, Dagys M, Shleev S, Kulys J. Consecutive Marcus Electron and Proton Transfer in Heme Peroxidase Compound II-Catalysed Oxidation Revealed by Arrhenius Plots. Sci Rep 2019; 9:14092. [PMID: 31575893 PMCID: PMC6773748 DOI: 10.1038/s41598-019-50466-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 09/12/2019] [Indexed: 11/16/2022] Open
Abstract
Electron and proton transfer reactions in enzymes are enigmatic and have attracted a great deal of theoretical, experimental, and practical attention. The oxidoreductases provide model systems for testing theoretical predictions, applying experimental techniques to gain insight into catalytic mechanisms, and creating industrially important bio(electro)conversion processes. Most previous and ongoing research on enzymatic electron transfer has exploited a theoretically and practically sound but limited approach that uses a series of structurally similar ("homologous") substrates, measures reaction rate constants and Gibbs free energies of reactions, and analyses trends predicted by electron transfer theory. This approach, proposed half a century ago, is based on a hitherto unproved hypothesis that pre-exponential factors of rate constants are similar for homologous substrates. Here, we propose a novel approach to investigating electron and proton transfer catalysed by oxidoreductases. We demonstrate the validity of this new approach for elucidating the kinetics of oxidation of "non-homologous" substrates catalysed by compound II of Coprinopsis cinerea and Armoracia rusticana peroxidases. This study - using the Marcus theory - demonstrates that reactions are not only limited by electron transfer, but a proton is transferred after the electron transfer event and thus both events control the reaction rate of peroxidase-catalysed oxidation of substrates.
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Affiliation(s)
- Audrius Laurynėnas
- Life Sciences Center, Vilnius University, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania.
| | - Marius Butkevičius
- Life Sciences Center, Vilnius University, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania
| | - Marius Dagys
- Life Sciences Center, Vilnius University, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania
| | - Sergey Shleev
- Malmö University, Jan Waldenströmsgata 25, SE-214 28, Malmö, Sweden
| | - Juozas Kulys
- Life Sciences Center, Vilnius University, Saulėtekio al. 7, LT-10257, Vilnius, Lithuania
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24
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Chen JH, Yu LJ, Boussac A, Wang-Otomo ZY, Kuang T, Shen JR. Properties and structure of a low-potential, penta-heme cytochrome c 552 from a thermophilic purple sulfur photosynthetic bacterium Thermochromatium tepidum. PHOTOSYNTHESIS RESEARCH 2019; 139:281-293. [PMID: 29691716 DOI: 10.1007/s11120-018-0507-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
The thermophilic purple sulfur bacterium Thermochromatium tepidum possesses four main water-soluble redox proteins involved in the electron transfer behavior. Crystal structures have been reported for three of them: a high potential iron-sulfur protein, cytochrome c', and one of two low-potential cytochrome c552 (which is a flavocytochrome c) have been determined. In this study, we purified another low-potential cytochrome c552 (LPC), determined its N-terminal amino acid sequence and the whole gene sequence, characterized it with absorption and electron paramagnetic spectroscopy, and solved its high-resolution crystal structure. This novel cytochrome was found to contain five c-type hemes. The overall fold of LPC consists of two distinct domains, one is the five heme-containing domain and the other one is an Ig-like domain. This provides a representative example for the structures of multiheme cytochromes containing an odd number of hemes, although the structures of multiheme cytochromes with an even number of hemes are frequently seen in the PDB database. Comparison of the sequence and structure of LPC with other proteins in the databases revealed several characteristic features which may be important for its functioning. Based on the results obtained, we discuss the possible intracellular function of this LPC in Tch. tepidum.
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Affiliation(s)
- Jing-Hua Chen
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, No. 20, Nanxincun, Xiangshan, Beijing, 100093, China
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan
- University of Chinese Academy of Sciences, Yuquan Rd, Shijingshan District, Beijing, 100049, China
| | - Long-Jiang Yu
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan
| | - Alain Boussac
- I2BC, SB2SM, CNRS UMR 9198, CEA Saclay, 91191, Gif-sur-Yvette, France
| | | | - Tingyun Kuang
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, No. 20, Nanxincun, Xiangshan, Beijing, 100093, China
| | - Jian-Ren Shen
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, No. 20, Nanxincun, Xiangshan, Beijing, 100093, China.
- Research Institute for Interdisciplinary Science, Graduate School of Natural Science and Technology, Okayama University, Okayama, 700-8530, Japan.
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25
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Song W, Zhao B, Wang C, Ozaki Y, Lu X. Functional nanomaterials with unique enzyme-like characteristics for sensing applications. J Mater Chem B 2019; 7:850-875. [DOI: 10.1039/c8tb02878h] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We highlight the recent developments in functional nanomaterials with unique enzyme-like characteristics for sensing applications.
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Affiliation(s)
- Wei Song
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Bing Zhao
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Ce Wang
- Alan G. MacDiarmid Institute
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
| | - Yukihiro Ozaki
- School of Science and Technology
- Kwansei Gakuin Universty
- Hyogo 660-1337
- Japan
| | - Xiaofeng Lu
- Alan G. MacDiarmid Institute
- College of Chemistry
- Jilin University
- Changchun
- P. R. China
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26
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Tang M, Zhou Z, Shangguan L, Zhao F, Liu S. Electrochemiluminescent detection of cardiac troponin I by using soybean peroxidase labeled-antibody as signal amplifier. Talanta 2018; 180:47-53. [PMID: 29332832 DOI: 10.1016/j.talanta.2017.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 10/18/2022]
Abstract
This work proposed an electrochemiluminescence (ECL) immunosensor for quantitative monitoring of cardiac troponin I (cTnI) in plasma with soybean peroxidase (SBP) labeled-antibody as signal amplifier. The ECL sandwich immunosensor was constructed by covalent binding anti-cTnI capture antibody (Ab1) to polyethylenimine-functionalized graphene matrix, which was obtained by a simple hydrothermal reaction between polyethylenimine (PEI) and graphene oxide (GO). After that, the SBP-labeled detection antibody (SBP-Ab2), synthesized by NaIO4 method, was immobilized on the surface of electrode through sandwich immunoreaction. The SBP on electrode surface displayed strong and stable ECL signal of luminol in the presence of H2O2, which could be used for cTnI detection with a concentration range of 5-30,000pg/mL and a detection limit of 3.3pg/mL. This proposed SBP-modified immunosensor displayed high sensitivity, selectivity and accuracy, and was expected not only to detect cTnI in practical human plasma sample but also to be used in other biomarkers detection.
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Affiliation(s)
- Min Tang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | | | - Li Shangguan
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Fang Zhao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Songqin Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
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27
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Fan L, Xu X, Zhu C, Han J, Gao L, Xi J, Guo R. Tumor Catalytic-Photothermal Therapy with Yolk-Shell Gold@Carbon Nanozymes. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4502-4511. [PMID: 29341583 DOI: 10.1021/acsami.7b17916] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Nanozymes, as a new generation of artificial enzymes, offer great opportunities in biomedical engineering and disease treatment. Synergizing the multiple intrinsic functions of nanozymes can improve their performance in biological systems. Here, we report a novel nanozyme with yolk-shell structure fabricated by combining a single gold nanoparticle core with a porous hollow carbon shell nanospheres (Au@HCNs). Au@HCNs exhibited enzyme-like activities similar to horseradish peroxidase and oxidase under an acidic environment, showing the ability of ROS generation. More importantly, the ROS production of Au@HCNs was significantly improved upon 808 nm light irradiation by the photothermal effect, which is often used for tumor therapy. Cellular and animal studies further demonstrated that the efficient tumor destruction was achieved through the combination of light-enhanced ROS and photothermal therapy. These results implied that the intrinsic enzyme-like activity and photothermal conversion of nanozymes can be synergized for efficient tumor treatment, providing a proof-of-concept of tumor catalytic-photothermal therapy based on nanozymes.
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Affiliation(s)
- Lei Fan
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, Jiangsu, China
| | - Xiangdong Xu
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, Jiangsu, China
| | - Chunhua Zhu
- Institute of Translational Medicine, Department of Pharmacology, School of Medicine, Yangzhou University , Yangzhou 225001 Jiangsu, China
| | - Jie Han
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, Jiangsu, China
| | - Lizeng Gao
- Institute of Translational Medicine, Department of Pharmacology, School of Medicine, Yangzhou University , Yangzhou 225001 Jiangsu, China
| | - Juqun Xi
- Institute of Translational Medicine, Department of Pharmacology, School of Medicine, Yangzhou University , Yangzhou 225001 Jiangsu, China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou 225009, Jiangsu, China
| | - Rong Guo
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, Jiangsu, China
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28
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Li J, Zhang Y, Huang Q, Shi H, Yang Y, Gao S, Mao L, Yang X. Degradation of organic pollutants mediated by extracellular peroxidase in simulated sunlit humic waters: A case study with 17β-estradiol. JOURNAL OF HAZARDOUS MATERIALS 2017; 331:123-131. [PMID: 28249181 DOI: 10.1016/j.jhazmat.2017.02.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 02/18/2017] [Accepted: 02/20/2017] [Indexed: 06/06/2023]
Abstract
A growing body of research indicated that natural processes such as photolysis, biotransformation and sorption contribute to natural attenuation of organic compounds in natural waters. Here we report another potential natural reaction involving induction by extracellular peroxidase (POD) in sunlit humic waters. The degradation behavior of a natural estrogen 17β-estradiol (E2) in waters containing both horseradish peroxidase (HRP) and Suwannee River humic acid (SRHA) were studied under simulated sunlight. Significant enhancement of E2 degradation was observed in the presence of HRP as compared to direct and SRHA-inducted photolysis, resulting from the efficient degradation of E2 induced by HRP using photoproduced H2O2. The contribution of direct photolysis, indirect photolysis and enzymatic degradation to E2 degradation was calculated as 36.6, 31.7 and 31.7%, respectively. Lower yields of hydroxylation products and several new dimer products in E2+SRHA+HRP system relative to E2+SRHA system indicated that E2 degradation was primarily mediated by HRP, revealing the presence of HRP strongly affected the degradation pathway of E2. Take naturally occurring POD into consideration, enzymatic degradation may be an important attenuation pathway of E2 and other contaminants that are sensitive to peroxidases in certain waters such as humic rich freshwater system.
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Affiliation(s)
- Jianhua Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Ya Zhang
- Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection of the People's Republic of China, Nanjing 210042, PR China
| | - Qingguo Huang
- College of Agricultural and Environmental Sciences, Department of Crop and Soil Sciences, University of Georgia, Griffin, GA 30223, United States
| | - Huanhuan Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Yun Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
| | - Liang Mao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Xi Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
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29
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Sangha AK, Petridis L, Cheng X, Smith JC. Relative Binding Affinities of Monolignols to Horseradish Peroxidase. J Phys Chem B 2016; 120:7635-40. [DOI: 10.1021/acs.jpcb.6b00789] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Amandeep K. Sangha
- UT/ORNL
Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Biochemistry and Cellular
and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Loukas Petridis
- UT/ORNL
Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiaolin Cheng
- UT/ORNL
Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Biochemistry and Cellular
and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jeremy C. Smith
- UT/ORNL
Center for Molecular Biophysics, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department of Biochemistry and Cellular
and Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
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30
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Silva MC, Torres JA, Castro AA, da Cunha EF, Alves de Oliveira LC, Corrêa AD, Ramalho TC. Combined experimental and theoretical study on the removal of pollutant compounds by peroxidases: affinity and reactivity toward a bioremediation catalyst. J Biomol Struct Dyn 2016; 34:1839-48. [DOI: 10.1080/07391102.2015.1063456] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Maria Cristina Silva
- Department of Chemistry, Federal University of Minas Gerais, 31270-901 Belo Horizonte, Brazil
| | | | - Alexandre A. Castro
- Department of Chemistry, Federal University of Lavras, 37200-000 Lavras, Brazil
| | | | | | | | - Teodorico C. Ramalho
- Department of Chemistry, Federal University of Lavras, 37200-000 Lavras, Brazil
- Center for Basic and Applied Research, University Hradec Kralove, Hradec Kralove, Czech Republic
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31
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Huber C, Preis M, Harvey PJ, Grosse S, Letzel T, Schröder P. Emerging pollutants and plants--Metabolic activation of diclofenac by peroxidases. CHEMOSPHERE 2016; 146:435-41. [PMID: 26741549 DOI: 10.1016/j.chemosphere.2015.12.059] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 12/15/2015] [Indexed: 05/14/2023]
Abstract
Human pharmaceuticals and their residues are constantly detected in our waterbodies, due to poor elimination rates, even in the most advanced waste water treatment plants. Their impact on the environment and human health still remains unclear. When phytoremediation is applied to aid water treatment, plants may transform and degrade xenobiotic contaminants through phase I and phase II metabolism to more water soluble and less toxic intermediates. In this context, peroxidases play a major role in activating compounds during phase I via oxidation. In the present work, the ability of a plant peroxidase to oxidize the human painkiller diclofenac was confirmed using stopped flow spectroscopy in combination with LC-MS analysis. Analysis of an orange colored product revealed the structure of the highly reactive Diclofenac-2,5-Iminoquinone, which may be the precursor of several biological conjugates and breakdown products in planta.
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Affiliation(s)
- Christian Huber
- Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Ingolstaedter Landstraße 1, D-85764 Neuherberg, Germany
| | - Martina Preis
- School of Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK
| | - Patricia J Harvey
- School of Science, University of Greenwich, Central Avenue, Chatham Maritime, Kent ME4 4TB, UK
| | - Sylvia Grosse
- Technische Universität München, Lehrstuhl für Siedlungswasserwirtschaft, Am Coulombwall, 85748 Garching, Germany
| | - Thomas Letzel
- Technische Universität München, Lehrstuhl für Siedlungswasserwirtschaft, Am Coulombwall, 85748 Garching, Germany
| | - Peter Schröder
- Helmholtz Zentrum München Deutsches Forschungszentrum für Gesundheit und Umwelt (GmbH), Ingolstaedter Landstraße 1, D-85764 Neuherberg, Germany.
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32
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Cheng L, Yan K, Zhang J. Integration of graphene-hemin hybrid materials in an electroenzymatic system for degradation of diclofenac. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.129] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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33
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Gao X, Huang S, Dong P, Wang C, Hou J, Huo X, Zhang B, Ma T, Ma X. Horseradish peroxidase (HRP): a tool for catalyzing the formation of novel bicoumarins. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01682g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Horseradish peroxidase was used to catalyze the formation of bicoumarins. The kinetic analysis and optimization of the transformation conditions were carried out in the present work.
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Affiliation(s)
- Xiaoxv Gao
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Shanshan Huang
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Peipei Dong
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Chao Wang
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Jie Hou
- College of Basic Medical Sciences
- Dalian Medical University
- Dalian
- PR China
| | - Xiaokui Huo
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Baojing Zhang
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
| | - Tonghui Ma
- College of Basic Medical Sciences
- Dalian Medical University
- Dalian
- PR China
| | - Xiaochi Ma
- College of Pharmacy
- Research Institute of Integrated Traditional and Western Medicine
- Dalian Medical University
- Dalian 116044
- PR China
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34
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Zhao J, Lu C, Franzen S. Distinct Enzyme–Substrate Interactions Revealed by Two Dimensional Kinetic Comparison between Dehaloperoxidase-Hemoglobin and Horseradish Peroxidase. J Phys Chem B 2015; 119:12828-37. [DOI: 10.1021/acs.jpcb.5b07126] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Zhao
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Chang Lu
- Department
of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Stefan Franzen
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
- Department
of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China
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35
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Bernardes A, Textor LC, Santos JC, Cuadrado NH, Kostetsky EY, Roig MG, Bavro VN, Muniz JR, Shnyrov VL, Polikarpov I. Crystal structure analysis of peroxidase from the palm tree Chamaerops excelsa. Biochimie 2015; 111:58-69. [DOI: 10.1016/j.biochi.2015.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 01/25/2015] [Indexed: 11/24/2022]
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36
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Kudalkar SN, Njuma OJ, Li Y, Muldowney M, Fuanta NR, Goodwin DC. A role for catalase-peroxidase large loop 2 revealed by deletion mutagenesis: control of active site water and ferric enzyme reactivity. Biochemistry 2015; 54:1648-62. [PMID: 25674665 DOI: 10.1021/bi501221a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Catalase-peroxidases (KatGs), the only catalase-active members of their superfamily, all possess a 35-residue interhelical loop called large loop 2 (LL2). It is essential for catalase activity, but little is known about its contribution to KatG function. LL2 shows weak sequence conservation; however, its length is nearly identical across KatGs, and its apex invariably makes contact with the KatG-unique C-terminal domain. We used site-directed and deletion mutagenesis to interrogate the role of LL2 and its interaction with the C-terminal domain in KatG structure and catalysis. Single and double substitutions of the LL2 apex had little impact on the active site heme [by magnetic circular dichroism or electron paramagnetic resonance (EPR)] and activity (catalase or peroxidase). Conversely, deletion of a single amino acid from the LL2 apex reduced catalase activity by 80%. Deletion of two or more apex amino acids or all of LL2 diminished catalase activity by 300-fold. Peroxide-dependent but not electron donor-dependent kcat/KM values for deletion variant peroxidase activity were reduced 20-200-fold, and kon for cyanide binding diminished by 3 orders of magnitude. EPR spectra for deletion variants were all consistent with an increase in the level of pentacoordinate high-spin heme at the expense of hexacoordinate high-spin states. Together, these data suggest a shift in the distribution of active site waters, altering the reactivity of the ferric state, toward, among other things, compound I formation. These results identify the importance of LL2 length conservation for maintaining an intersubunit interaction that is essential for an active site water distribution that facilitates KatG catalytic activity.
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Affiliation(s)
- Shalley N Kudalkar
- Department of Chemistry and Biochemistry, Auburn University , Auburn, Alabama 36849-5312, United States
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37
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Pandey VP, Dwivedi UN. A ripening associated peroxidase from papaya having a role in defense and lignification: Heterologous expression and in-silico and in-vitro experimental validation. Gene 2015; 555:438-47. [DOI: 10.1016/j.gene.2014.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 10/25/2014] [Accepted: 11/08/2014] [Indexed: 11/16/2022]
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38
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Simpson N, Adamczyk K, Hithell G, Shaw DJ, Greetham GM, Towrie M, Parker AW, Hunt NT. The effect on structural and solvent water molecules of substrate binding to ferric horseradish peroxidase. Faraday Discuss 2015; 177:163-79. [DOI: 10.1039/c4fd00161c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultrafast, multi-dimensional infrared spectroscopy, in the form of 2D-IR and pump–probe measurements, has been employed to investigate the effect of substrate binding on the structural dynamics of the horseradish peroxidase (HRP) enzyme. Using nitric oxide bound to the ferric haem of HRP as a sensitive probe of local dynamics, we report measurements of the frequency fluctuations (spectral diffusion) and vibrational lifetime of the NO stretching mode with benzohydroxamic acid (BHA) located in the substrate-binding position at the periphery of the haem pocket, in both D2O and H2O solvents. The results reveal that, with BHA bound to the enzyme, the local structural dynamics are insensitive to H/D exchange. These results are in stark contrast to those found in studies of the substrate-free enzyme, which demonstrated that the local chemical and dynamic environment of the haem ligand is influenced by water molecules. In light of the large changes in solvent accessibility caused by substrate binding, we discuss the potential for varying roles for the solvent in the haem pocket of HRP at different stages along the reaction coordinate of the enzymatic mechanism.
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Affiliation(s)
- Niall Simpson
- Department of Physics
- University of Strathclyde
- SUPA
- Glasgow
- UK
| | | | - Gordon Hithell
- Department of Physics
- University of Strathclyde
- SUPA
- Glasgow
- UK
| | - Daniel J. Shaw
- Department of Physics
- University of Strathclyde
- SUPA
- Glasgow
- UK
| | - Gregory M. Greetham
- Central Laser Facility, Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - Michael Towrie
- Central Laser Facility, Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - Anthony W. Parker
- Central Laser Facility, Research Complex at Harwell
- STFC Rutherford Appleton Laboratory
- Didcot
- UK
| | - Neil T. Hunt
- Department of Physics
- University of Strathclyde
- SUPA
- Glasgow
- UK
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39
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Baker M, Zhao H, Sakharov IY, Li QX. Amino acid sequence of anionic peroxidase from the windmill palm tree Trachycarpus fortunei. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:11941-8. [PMID: 25383699 PMCID: PMC4334278 DOI: 10.1021/jf504511h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 11/03/2014] [Accepted: 11/10/2014] [Indexed: 05/09/2023]
Abstract
Palm peroxidases are extremely stable and have uncommon substrate specificity. This study was designed to fill in the knowledge gap about the structures of a peroxidase from the windmill palm tree Trachycarpus fortunei. The complete amino acid sequence and partial glycosylation were determined by MALDI-top-down sequencing of native windmill palm tree peroxidase (WPTP), MALDI-TOF/TOF MS/MS of WPTP tryptic peptides, and cDNA sequencing. The propeptide of WPTP contained N- and C-terminal signal sequences which contained 21 and 17 amino acid residues, respectively. Mature WPTP was 306 amino acids in length, and its carbohydrate content ranged from 21% to 29%. Comparison to closely related royal palm tree peroxidase revealed structural features that may explain differences in their substrate specificity. The results can be used to guide engineering of WPTP and its novel applications.
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Affiliation(s)
- Margaret
R. Baker
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Hongwei Zhao
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
- School
of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Ivan Yu. Sakharov
- Department
of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Qing X. Li
- Department
of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
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40
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Adamczyk K, Simpson N, Greetham GM, Gumiero A, Walsh MA, Towrie M, Parker AW, Hunt NT. Ultrafast infrared spectroscopy reveals water-mediated coherent dynamics in an enzyme active site. Chem Sci 2014; 6:505-516. [PMID: 28936306 PMCID: PMC5588449 DOI: 10.1039/c4sc02752c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 10/22/2014] [Indexed: 11/24/2022] Open
Abstract
Ultrafast infrared spectroscopy provides insights into the dynamic nature of water in the active sites of catalase and peroxidase enzymes.
Understanding the impact of fast dynamics upon the chemical processes occurring within the active sites of proteins and enzymes is a key challenge that continues to attract significant interest, though direct experimental insight in the solution phase remains sparse. Similar gaps in our knowledge exist in understanding the role played by water, either as a solvent or as a structural/dynamic component of the active site. In order to investigate further the potential biological roles of water, we have employed ultrafast multidimensional infrared spectroscopy experiments that directly probe the structural and vibrational dynamics of NO bound to the ferric haem of the catalase enzyme from Corynebacterium glutamicum in both H2O and D2O. Despite catalases having what is believed to be a solvent-inaccessible active site, an isotopic dependence of the spectral diffusion and vibrational lifetime parameters of the NO stretching vibration are observed, indicating that water molecules interact directly with the haem ligand. Furthermore, IR pump–probe data feature oscillations originating from the preparation of a coherent superposition of low-frequency vibrational modes in the active site of catalase that are coupled to the haem ligand stretching vibration. Comparisons with an exemplar of the closely-related peroxidase enzyme family shows that they too exhibit solvent-dependent active-site dynamics, supporting the presence of interactions between the haem ligand and water molecules in the active sites of both catalases and peroxidases that may be linked to proton transfer events leading to the formation of the ferryl intermediate Compound I. In addition, a strong, water-mediated, hydrogen bonding structure is suggested to occur in catalase that is not replicated in peroxidase; an observation that may shed light on the origins of the different functions of the two enzymes.
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Affiliation(s)
- Katrin Adamczyk
- Department of Physics , University of Strathclyde , SUPA , 107 Rottenrow East , Glasgow , G4 0NG , UK .
| | - Niall Simpson
- Department of Physics , University of Strathclyde , SUPA , 107 Rottenrow East , Glasgow , G4 0NG , UK .
| | - Gregory M Greetham
- Central Laser Facility , Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Oxford , Didcot, Oxon , OX11 0QX , UK
| | - Andrea Gumiero
- Diamond Light Source , Diamond House, Harwell Science and Innovation Campus , Didcot, Oxfordshire , OX11 0DE , UK
| | - Martin A Walsh
- Diamond Light Source , Diamond House, Harwell Science and Innovation Campus , Didcot, Oxfordshire , OX11 0DE , UK
| | - Michael Towrie
- Central Laser Facility , Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Oxford , Didcot, Oxon , OX11 0QX , UK
| | - Anthony W Parker
- Central Laser Facility , Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Oxford , Didcot, Oxon , OX11 0QX , UK
| | - Neil T Hunt
- Department of Physics , University of Strathclyde , SUPA , 107 Rottenrow East , Glasgow , G4 0NG , UK .
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41
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Navapour L, Mogharrab N, Amininasab M. How modification of accessible lysines to phenylalanine modulates the structural and functional properties of horseradish peroxidase: a simulation study. PLoS One 2014; 9:e109062. [PMID: 25313804 PMCID: PMC4196758 DOI: 10.1371/journal.pone.0109062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 09/09/2014] [Indexed: 11/19/2022] Open
Abstract
Horseradish Peroxidase (HRP) is one of the most studied peroxidases and a great number of chemical modifications and genetic manipulations have been carried out on its surface accessible residues to improve its stability and catalytic efficiency necessary for biotechnological applications. Most of the stabilized derivatives of HRP reported to date have involved chemical or genetic modifications of three surface-exposed lysines (K174, K232 and K241). In this computational study, we altered these lysines to phenylalanine residues to model those chemical modifications or genetic manipulations in which these positively charged lysines are converted to aromatic hydrophobic residues. Simulation results implied that upon these substitutions, the protein structure becomes less flexible. Stability gains are likely to be achieved due to the increased number of stable hydrogen bonds, improved heme-protein interactions and more integrated proximal Ca2+ binding pocket. We also found a new persistent hydrogen bond between the protein moiety (F174) and the heme prosthetic group as well as two stitching hydrogen bonds between the connecting loops GH and F′F″ in mutated HRP. However, detailed analysis of functionally related structural properties and dynamical features suggests reduced reactivity of the enzyme toward its substrates. Molecular dynamics simulations showed that substitutions narrow the bottle neck entry of peroxide substrate access channel and reduce the surface accessibility of the distal histidine (H42) and heme prosthetic group to the peroxide and aromatic substrates, respectively. Results also demonstrated that the area and volume of the aromatic-substrate binding pocket are significantly decreased upon modifications. Moreover, the hydrophobic patch functioning as a binding site or trap for reducing aromatic substrates is shrunk in mutated enzyme. Together, the results of this simulation study could provide possible structural clues to explain those experimental observations in which the protein stability achieved concurrent with a decrease in enzyme activity, upon manipulation of charge/hydrophobicity balance at the protein surface.
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Affiliation(s)
- Leila Navapour
- Biophysics and Computational Biology Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Navid Mogharrab
- Biophysics and Computational Biology Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
- Institute of Biotechnology, Shiraz University, Shiraz, Iran
- * E-mail:
| | - Mehriar Amininasab
- Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
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42
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Aumiller WM, Davis BW, Hatzakis E, Keating CD. Interactions of macromolecular crowding agents and cosolutes with small-molecule substrates: effect on horseradish peroxidase activity with two different substrates. J Phys Chem B 2014; 118:10624-32. [PMID: 25157999 PMCID: PMC4161143 DOI: 10.1021/jp506594f] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
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The importance of solution composition
on enzymatic reactions is
increasingly appreciated, particularly with respect to macromolecular
cosolutes. Macromolecular crowding and its effect on enzymatic reactions
has been studied for several enzymes and is often understood in terms
of changes to enzyme conformation. Comparatively little attention
has been paid to the chemical properties of small-molecule substrates
for enzyme reactions in crowded solution. In this article, we studied
the reaction of horseradish peroxidase (HRP) with two small-molecule
substrates that differ in their hydrophobicity. Crowding agents and
cosolutes had quite different effects on HRP activity when the substrate
used was 3,3′,5,5′-tetramethylbenzidine (TMB, which
is hydrophobic) as compared to o-phenylenediamine
(OPD, which is more hydrophilic). Reaction rates with TMB were much
more sensitive to the presence of crowding agents and cosolutes than
OPD, suggesting that the small-molecule substrates may themselves
be interacting with crowders and cosolutes. At high polyethylene glycol
(PEG) concentrations (25–30 wt/wt %), no reaction was observed
for TMB. Even at lower concentrations, Michaelis constants (KM) for HRP with the more hydrophobic substrate
increased in the presence of crowding agents and cosolutes, particularly
with PEG. Diffusion of TMB and OPD in the PEG and dextran reaction
media was evaluated using pulsed field gradient nuclear magnetic resonance
(PFG-NMR). The diffusivity of the TMB decreased 3.9× in 10% PEG
8k compared to that in buffer and decreased only 1.7× for OPD.
Together, these data suggest that weak attractive interactions between
small-molecule substrates and crowders or cosolutes can reduce substrate
chemical activity and consequently decrease enzyme activity and that
these effects vary with the identity of the molecules involved. Because
many enzymes can act on multiple substrates, it is important to consider
substrate chemistry in understanding enzymatic reactions in complex
media such as biological fluids.
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Affiliation(s)
- William M Aumiller
- Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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43
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Palm GJ, Sharma A, Kumari M, Panjikar S, Albrecht D, Jagannadham MV, Hinrichs W. Post-translational modification and extended glycosylation pattern of a plant latex peroxidase of native source characterized by X-ray crystallography. FEBS J 2014; 281:4319-33. [DOI: 10.1111/febs.12900] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 06/05/2014] [Accepted: 06/27/2014] [Indexed: 11/28/2022]
Affiliation(s)
| | - Anurag Sharma
- Institut für Biochemie; Universität Greifswald; Germany
- Molecular Biology Unit; Institute of Medical Sciences; Banaras Hindu University; Varanasi India
| | - Moni Kumari
- Molecular Biology Unit; Institute of Medical Sciences; Banaras Hindu University; Varanasi India
| | - Santosh Panjikar
- Australian Synchrotron; Clayton Victoria Australia
- Department of Biochemistry and Molecular Biology; Monash University; Victoria Australia
| | - Dirk Albrecht
- Institut für Mikrobiologie; Universität Greifswald; Germany
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44
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Glucose-sensitive colorimetric sensor based on peroxidase mimics activity of porphyrin-Fe3O4 nanocomposites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 41:142-51. [DOI: 10.1016/j.msec.2014.04.038] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 03/16/2014] [Accepted: 04/18/2014] [Indexed: 11/17/2022]
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45
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Ren LL, Liu YJ, Liu HJ, Qian TT, Qi LW, Wang XR, Zeng QY. Subcellular Relocalization and Positive Selection Play Key Roles in the Retention of Duplicate Genes of Populus Class III Peroxidase Family. THE PLANT CELL 2014; 26:2404-2419. [PMID: 24934172 PMCID: PMC4114941 DOI: 10.1105/tpc.114.124750] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/18/2014] [Accepted: 05/24/2014] [Indexed: 05/20/2023]
Abstract
Gene duplication is the primary source of new genes and novel functions. Over the course of evolution, many duplicate genes lose their function and are eventually removed by deletion. However, some duplicates have persisted and evolved diverse functions. A particular challenge is to understand how this diversity arises and whether positive selection plays a role. In this study, we reconstructed the evolutionary history of the class III peroxidase (PRX) genes from the Populus trichocarpa genome. PRXs are plant-specific enzymes that play important roles in cell wall metabolism and in response to biotic and abiotic stresses. We found that two large tandem-arrayed clusters of PRXs evolved from an ancestral cell wall type PRX to vacuole type, followed by tandem duplications and subsequent functional specification. Substitution models identified seven positively selected sites in the vacuole PRXs. These positively selected sites showed significant effects on the biochemical functions of the enzymes. We also found that positive selection acts more frequently on residues adjacent to, rather than directly at, a critical active site of the enzyme, and on flexible regions rather than on rigid structural elements of the protein. Our study provides new insights into the adaptive molecular evolution of plant enzyme families.
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Affiliation(s)
- Lin-Ling Ren
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yan-Jing Liu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Hai-Jing Liu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Ting-Ting Qian
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Li-Wang Qi
- Laboratory of Cell Biology, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China
| | - Xiao-Ru Wang
- Department of Ecology and Environmental Science, UPSC, Umeå University, SE-90187 Umeå, Sweden
| | - Qing-Yin Zeng
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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46
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Molecular Cloning and Partial Characterization of a Peroxidase Gene Expressed in the Roots ofPortulaca oleraceacv., One Potentially Useful in the Remediation of Phenolic Pollutants. Biosci Biotechnol Biochem 2014; 75:882-90. [DOI: 10.1271/bbb.100823] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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47
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Lohse J, Petersen KH, Woller NC, Pedersen HC, Skladtchikova G, Jørgensen RM. Improved Catalyzed Reporter Deposition, iCARD. Bioconjug Chem 2014; 25:1036-42. [DOI: 10.1021/bc400311g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jesper Lohse
- Dako A/S, Produktionsvej 42, 2600 Glostrup, Denmark
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48
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Affiliation(s)
- Thomas L. Poulos
- Departments of Molecular Biology & Biochemistry, Pharmaceutical Sciences, and Chemistry, University of California Irvine, Irvine, California 92697-3900
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49
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Wang C, Qian C, Roman M, Glasser WG, Esker AR. Surface-Initiated Dehydrogenative Polymerization of Monolignols: A Quartz Crystal Microbalance with Dissipation Monitoring and Atomic Force Microscopy Study. Biomacromolecules 2013; 14:3964-72. [DOI: 10.1021/bm401084h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Chao Wang
- Departments of †Chemistry and ‡Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Chen Qian
- Departments of †Chemistry and ‡Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Maren Roman
- Departments of †Chemistry and ‡Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Wolfgang G. Glasser
- Departments of †Chemistry and ‡Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Alan R. Esker
- Departments of †Chemistry and ‡Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
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50
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Affiliation(s)
- Étienne Delannoy
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
| | - Philippe Marmey
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
| | - Claude Penel
- Laboratoire de Physiologie végétale, Université de Genève, Quai Ernest-Ansermet 30, CH-1211, Genève 4
| | - Michel Nicole
- Unité “Résistance des plantes”, IRD (Institut de recherche pour le développement), UMR DGPC, 911 avenue Agropolis, B.P. 64501, F-34394, Montpellier cedex
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