1
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Jalili S, Panji M, Mahdavimehr M, Mohseni Ahangar A, Shirzad H, Mousavi Nezhad SA, Palhano FL. Enhancing anti-amyloidogenic properties and antioxidant effects of Scutellaria baicalensis polyphenols through novel nanoparticle formation. Int J Biol Macromol 2024; 262:130003. [PMID: 38325696 DOI: 10.1016/j.ijbiomac.2024.130003] [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: 12/07/2023] [Revised: 01/27/2024] [Accepted: 02/04/2024] [Indexed: 02/09/2024]
Abstract
Protein aggregation and oxidative stress have gained significant research attention due to their association with a group of diseases known as amyloidosis. Among the strategies developed to prevent amyloidosis, utilization of polyphenols stands out as one of the most commonly employed approaches. Scutellaria baicalensis is renowned as one of the foremost herbal sources of polyphenols. In this study, we employed a direct oxidative pyrolysis method for polymerizing S. baicalensis's polyphenols (SBPPs) after their extraction, resulting in the formation of novel SBPPs nanoparticles. Upon polymerization, SBPPs nanoparticles showed remarkable properties including heightened water solubility, increased surface area, modified surface functional groups, and enhanced stability. As a result of these diverse factors, there was a considerable enhancement in the anti-amyloidogenic properties and antioxidant effects of SBPPs nanoparticles compared to its bulk form. The fibrillation kinetics, AFM images, and cytotoxicity assays strongly indicate that SBPPs nanoparticles are more effective than SBPPs at preventing amyloid fibril formation and associated cell toxicity. Additionally, SBPPs nanoparticles demonstrated more effective prevention of reactive oxygen species (ROS) production. In conclusion, the use of SBPPs in nanoparticle form presents a promising strategy to enhance anti-amyloidogenic properties, mitigate oxidative stress, and offer potential therapeutic benefits for amyloidosis-related diseases.
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Affiliation(s)
- Shirin Jalili
- Research Center for Life and Health Sciences and Biotechnology of the Police, Directorate of Health, Rescue & Treatment, Police Headquarter, Tehran 1417944661, Iran; Institute of Police Equipment and Technologies, Policing Sciences and Social Studies Research Institute, Tehran 1417944661, Iran
| | - Mohammad Panji
- Research Center for Life and Health Sciences and Biotechnology of the Police, Directorate of Health, Rescue & Treatment, Police Headquarter, Tehran 1417944661, Iran
| | - Mohsen Mahdavimehr
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417614335, Iran.
| | - Ali Mohseni Ahangar
- School of Metallurgy & Materials Engineering, Iran University of Science and Technology (IUST), Narmak, Tehran 16846, Iran
| | - Hadi Shirzad
- Research Center for Life and Health Sciences and Biotechnology of the Police, Directorate of Health, Rescue & Treatment, Police Headquarter, Tehran 1417944661, Iran
| | - Seyed Amin Mousavi Nezhad
- Research Center for Life and Health Sciences and Biotechnology of the Police, Directorate of Health, Rescue & Treatment, Police Headquarter, Tehran 1417944661, Iran
| | - Fernando L Palhano
- Instituto de Bioquímica Médica, Programa de Biologia Estrutural, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, Brazil.
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2
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Ebrahim-Habibi A, Kashani-Amin E, Larijani B. Modeling and simulation in medical sciences: an overview of specific applications based on research experience in EMRI (Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences). J Diabetes Metab Disord 2021:1-7. [PMID: 33500880 PMCID: PMC7821172 DOI: 10.1007/s40200-020-00706-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/26/2020] [Accepted: 12/07/2020] [Indexed: 01/31/2023]
Abstract
The concomitant use of various types of models (in silico, in vitro, and in vivo) has been exemplified here within the context of biomedical researches performed in the Endocrinology and Metabolism Research Institute (EMRI) of Tehran University of Medical Sciences. Two main research aeras have been discussed: the search for new small molecules as therapeutics for diabetes and related metabolic conditions, and diseases related to protein aggregation. Due to their multidisciplinary nature, the majority of these studies have needed the collaboration of different specialties. In both cases, a brief overview of the subject is provided through literature examples, and sequential use of these methods is described.
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Affiliation(s)
- Azadeh Ebrahim-Habibi
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Jalal-al-Ahmad Street, Chamran Highway, 1411713137 Tehran, Iran
| | - Elaheh Kashani-Amin
- Biosensor Research Center, Endocrinology and Metabolism Molecular-Cellular Sciences Institute, Tehran University of Medical Sciences, Jalal-al-Ahmad Street, Chamran Highway, 1411713137 Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
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3
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Rostampour Ghareghozloo E, Mahdavimehr M, Meratan AA, Nikfarjam N, Ghasemi A, Katebi B, Nemat-Gorgani M. Role of surface oxygen-containing functional groups of graphene oxide quantum dots on amyloid fibrillation of two model proteins. PLoS One 2020; 15:e0244296. [PMID: 33362209 PMCID: PMC7757872 DOI: 10.1371/journal.pone.0244296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/08/2020] [Indexed: 12/13/2022] Open
Abstract
There are many reports demonstrating that various derivatives of carbon nanoparticles are effective inhibitors of protein aggregation. As surface structural features of nanoparticles play a key role on modulating amyloid fibrillation process, in the present in vitro study, bovine insulin and hen egg white lysozyme (HEWL) were selected as two model proteins to investigate the reducing effect of graphene oxide quantum dots (GOQDs) on their assembly under amyloidogenic conditions. GOQDs were prepared through direct pyrolysis of citric acid, and the reduction step was carried out using ascorbic acid. The prepared nanoparticles were characterized by UV-Vis, X-ray photoelectron, and FT-IR spectroscopies, transmission electron and atomic force microscopies, zeta potential measurement, and Nile red fluorescence assay. They showed the tendencies to modulate the assembly of the proteins through different mechanisms. While GOQDs appeared to have the capacity to inhibit fibrillation, the presence of reduced GOQDs (rGOQDs) was found to promote protein assembly via shortening the nucleation phase, as suggested by ThT fluorescence data. Moreover, the structures produced in the presence of GOQDs or rGOQDs were totally nontoxic. We suggest that surface properties of these particles may be part of the differences in their mechanism(s) of action.
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Affiliation(s)
| | - Mohsen Mahdavimehr
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Ali Akbar Meratan
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
- * E-mail: ,
| | - Nasser Nikfarjam
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Bentolhoda Katebi
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Mohsen Nemat-Gorgani
- Stanford Genome Technology Center, Stanford University, Palo Alto, CA, United States of America
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4
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Es-haghi A, Ebrahim-Habibi A. Inhibition of amyloid fibrillation of apo-carbonic anhydrase by flavonoid compounds. J Biosci 2019. [DOI: 10.1007/s12038-019-9866-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Azami-Movahed M, Meratan AA, Ghasemi A, Ebrahim-Habibi A, Nemat-Gorgani M. Acetylation of lysine residues in apomyoglobin: Structural changes, amyloid fibrillation, and role of surface charge. Int J Biol Macromol 2018; 107:626-634. [DOI: 10.1016/j.ijbiomac.2017.09.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 12/21/2022]
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6
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Kachooei E, Mozaffarian F, Khodagholi F, Sadeghi P, Karami L, Ghasemi A, Vahdat E, Saboury AA, Sheibani N, Moosavi-Movahedi AA. Paclitaxel inhibited lysozyme fibrillation by increasing colloidal stability through formation of "off-pathway" oligomers. Int J Biol Macromol 2018; 111:870-879. [PMID: 29352977 DOI: 10.1016/j.ijbiomac.2018.01.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 12/13/2022]
Abstract
Protein fibrillation is a challenging issue in medicine, causing many diseases, and an impediment to pharmaceutics and protein industry. Many chemicals, especially polyphenol compounds and aromatic small molecules, have been widely used as an effective strategy to combat protein fibril formation. Hence, understanding mechanisms of fibrillation inhibition and contributing forces in this process are significant. In this study, the inhibitory effect of paclitaxel on lysozyme fibrillation was investigated with respect to thermal and colloidal stability. Fibrillation was monitored with ThT fluorescence, circular dichroism, and AFM; paclitaxel-lysozyme interaction with isothermal titration calorimetry and docking; thermal and colloidal stability with differential scanning calorimetry and zeta-pulse, respectively. Paclitaxel inhibited lysozyme fibrillation, and interacted with lysozyme through hydrogen bonds and van der Waals' interactions. The viability of PC12 cells retrieved as a result of fibrillation inhibition by paclitaxel. Hydrophobic forces dominantly shielded the aggregation-prone region of lysozyme and suppressed the effective interactions between lysozyme monomers. Although paclitaxel did not affect lysozyme's thermal stability, it increased lysozyme's colloidal stability by either increasing the surface charge density or charge distribution on lysozyme. In conclusion, our results suggest a model for paclitaxel's inhibitory role through two complementary steps driving to "off-pathway" oligomer formation and attenuation of fibril formation.
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Affiliation(s)
- Ehsan Kachooei
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Faroogh Mozaffarian
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Payam Sadeghi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Karami
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Elham Vahdat
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Nader Sheibani
- Departments of Ophthalmology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Ali Akbar Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran.
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7
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Xin L, Li Y, Wu L, Zhao J, Song Z. Quantitative Monitoring of Rutin in Human Urine by Flow Injection-Chemiluminescence Analysis. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201600884] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ladi Xin
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science; Northwest University; Xi'an 710127 China
| | - Yajuan Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science; Northwest University; Xi'an 710127 China
| | - Lingmin Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science; Northwest University; Xi'an 710127 China
| | - Jingchan Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science; Northwest University; Xi'an 710127 China
| | - Zhenghua Song
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science; Northwest University; Xi'an 710127 China
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8
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Zeng HJ, Yang D, Hu GZ, Yang R, Qu LB. Studies on the binding of pepsin with three pyrethroid insecticides by multi-spectroscopic approaches and molecular docking. J Mol Recognit 2016; 29:476-84. [PMID: 27135781 DOI: 10.1002/jmr.2547] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/17/2016] [Accepted: 04/06/2016] [Indexed: 11/08/2022]
Abstract
In this study, the molecular interactions between pepsin and three pyrethroid insecticides, including fenvalerate, cyhalothrin and deltamethrin, were investigated by multi-spectroscopic and molecular docking methods under mimic physiological pH conditions. The results indicated that all of these insecticides could interact with pepsin to form insecticide-pepsin complexes. The binding constants, number of binding sites and thermodynamic parameters measured at different temperatures indicated that these three pyrethroid insecticides could spontaneously bind with pepsin mainly through electrostatic forces and hydrophobic interactions with one binding site. According to the theory of Föster's non-radioactive energy transfer, the distance (r) between pepsin and three pyrethroid insecticides were all found to be less than 7 nm, which implied that the energy transfer occurred between pepsin and these insecticides, leading to the quenching of pepsin fluorescence. Synchronous and three-dimensional fluorescence, CD spectra and molecular docking results indicated that all tested pyrethroid insecticides bound directly into the enzyme cavity site and the binding of insecticides into the cavity influenced the microenvironment of the pepsin activity site which resulted in the extension of peptide strands of pepsin with loss of α-helix structures.Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Hua-Jin Zeng
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Dan Yang
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Gui-Zhou Hu
- School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Ran Yang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, PR China.
| | - Ling-Bo Qu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001, PR China
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9
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Lin Y, Kardos J, Imai M, Ikenoue T, Kinoshita M, Sugiki T, Ishimori K, Goto Y, Lee YH. Amorphous Aggregation of Cytochrome c with Inherently Low Amyloidogenicity Is Characterized by the Metastability of Supersaturation and the Phase Diagram. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2010-2022. [PMID: 26824789 DOI: 10.1021/acs.langmuir.5b03810] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Despite extensive studies on the folding and function of cytochrome c, the mechanisms underlying its aggregation remain largely unknown. We herein examined the aggregation behavior of the physiologically relevant two types of cytochrome c, metal-bound cytochrome c, and its fragment with high amyloidogenicity as predicted in alcohol/water mixtures. Although the aggregation propensity of holo cytochrome c was low due to high solubility, markedly unfolded apo cytochrome c, lacking the heme prosthetic group, strongly promoted the propensity for amorphous aggregation with increases in hydrophobicity. Silver-bound apo cytochrome c increased the capacity of fibrillar aggregation (i.e., protofibrils or immature fibrils) due to subtle structural changes of apo cytochrome c by strong binding of silver. However, mature amyloid fibrils were not detected for any of the cytochrome c variants or its fragment, even with extensive ultrasonication, which is a powerful amyloid inducer. These results revealed the intrinsically low amyloidogenicity of cytochrome c, which is beneficial for its homeostasis and function by facilitating the folding and minimizing irreversible amyloid formation. We propose that intrinsically low amyloidogenicity of cytochrome c is attributed to the low metastability of supersaturation. The phase diagram constructed based on solubility and aggregate type is useful for a comprehensive understanding of protein aggregation. Furthermore, amorphous aggregation, which is also viewed as a generic property of proteins, and amyloid fibrillation can be distinguished from each other by the metastability of supersaturation.
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Affiliation(s)
- Yuxi Lin
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - József Kardos
- MTA-ELTE NAP B Neuroimmunology Research Group, Department of Biochemistry, Eötvös Loránd University , Budapest H-1117, Hungary
| | - Mizue Imai
- Graduate School of Chemical Sciences and Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Tatsuya Ikenoue
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Misaki Kinoshita
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Toshihiko Sugiki
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Koichiro Ishimori
- Graduate School of Chemical Sciences and Engineering, Hokkaido University , Kita 13, Nishi 8, Kita-ku, Sapporo 060-8628, Japan
| | - Yuji Goto
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
| | - Young-Ho Lee
- Institute for Protein Research, Osaka University , Yamadaoka 3-2, Suita, Osaka 565-0871, Japan
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10
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Structural stability of myoglobin and glycomyoglobin: a comparative molecular dynamics simulation study. J Biol Phys 2015; 41:349-66. [PMID: 25701404 DOI: 10.1007/s10867-015-9383-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/26/2015] [Indexed: 01/27/2023] Open
Abstract
Glycoproteins are formed as the result of enzymatic glycosylation or chemical glycation in the body, and produced in vitro in industrial processes. The covalently attached carbohydrate molecule(s) confer new properties to the protein, including modified stability. In the present study, the structural stability of a glycoprotein form of myoglobin, bearing a glucose unit in the N-terminus, has been compared with its native form by the use of molecular dynamics simulation. Both structures were subjected to temperatures of 300 and 500 K in an aqueous environment for 10 ns. Changes in secondary structures and RMSD were then assessed. An overall higher stability was detected for glycomyoglobin, for which the most stable segments/residues were highlighted and compared with the native form. The simple addition of a covalently bound glucose is suggested to exert its stabilizing effect via increased contacts with surrounding water molecules, as well as a different pattern of interactions with neighbor residues.
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11
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Profit AA, Vedad J, Saleh M, Desamero RZB. Aromaticity and amyloid formation: effect of π-electron distribution and aryl substituent geometry on the self-assembly of peptides derived from hIAPP(22-29). Arch Biochem Biophys 2015; 567:46-58. [PMID: 25524740 PMCID: PMC5490837 DOI: 10.1016/j.abb.2014.12.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 11/26/2014] [Accepted: 12/07/2014] [Indexed: 10/24/2022]
Abstract
A comprehensive investigation of peptides derived from the 22-29 region of human islet amyloid polypeptide (hIAPP) that contain phenylalanine analogs at position 23 with a variety of electron donating and withdrawing groups, along with heteroaromatic surrogates, has been employed to interrogate how π-electron distribution effects amyloid formation. Kinetic aggregation studies using turbidity measurements indicate that electron rich aromatic ring systems consistently abolish the amyloidogenic propensity of hIAPP(22-29). Electron poor systems modulate the rate of aggregation. Raman and Fourier transform infrared spectroscopy confirm the parallel β-sheet secondary structure of aggregates derived from peptides containing electron poor phenylalanine analogs and provide direct evidence of ring stacking. Transmission electron microscopy confirms the presence of amyloid fibrils. The effect of aryl substituent geometry on peptide self-assembly reveals that the electronic nature of substituents and not their steric profile is responsible for failure of the electron donating group peptides to aggregate. Non-aggregating hIAPP(22-29) peptides were found to inhibit the self-assembly of full-length hIAPP(1-37). The most potent inhibitory peptides contain phenylalanine with the p-amino and p-formamido functionalities. These novel peptides may serve as leads for the development of future aggregation inhibitors. A potential mechanism for inhibition of amylin self-assembly by electron rich (-29) peptides is proposed.
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Affiliation(s)
- Adam A Profit
- York College, Institute for Macromolecular Assemblies and the Graduate Center of the City University of New York, Jamaica, NY 11451, United States.
| | - Jayson Vedad
- York College, Institute for Macromolecular Assemblies and the Graduate Center of the City University of New York, Jamaica, NY 11451, United States
| | - Mohamad Saleh
- York College, Institute for Macromolecular Assemblies and the Graduate Center of the City University of New York, Jamaica, NY 11451, United States
| | - Ruel Z B Desamero
- York College, Institute for Macromolecular Assemblies and the Graduate Center of the City University of New York, Jamaica, NY 11451, United States.
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12
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Tan X, Wang Z, Chen D, Luo K, Xiong X, Song Z. Study on the interaction of catalase with pesticides by flow injection chemiluminescence and molecular docking. CHEMOSPHERE 2014; 108:26-32. [PMID: 24875908 DOI: 10.1016/j.chemosphere.2014.02.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Accepted: 02/22/2014] [Indexed: 06/03/2023]
Abstract
The interaction mechanisms of catalase (CAT) with pesticides (including organophosphates: disulfoton, isofenphos-methyl, malathion, isocarbophos, dimethoate, dipterex, methamidophos and acephate; carbamates: carbaryl and methomyl; pyrethroids: fenvalerate and deltamethrin) were first investigated by flow injection (FI) chemiluminescence (CL) analysis and molecular docking. By homemade FI-CL model of lg[(I0-I)/I]=lgK+nlg[D], it was found that the binding processes of pesticides to CAT were spontaneous with the apparent binding constants K of 10(3)-10(5) L mol(-1) and the numbers of binding sites about 1.0. The binding abilities of pesticides to CAT followed the order: fenvalerate>deltamethrin>disulfoton>isofenphos-methyl>carbaryl>malathion>isocarbophos>dimethoate>dipterex>acephate>methomyl>methamidophos, which was generally similar to the order of determination sensitivity of pesticides. The thermodynamic parameters revealed that CAT bound with hydrophobic pesticides by hydrophobic interaction force, and with hydrophilic pesticides by hydrogen bond and van der Waals force. The pesticides to CAT molecular docking study showed that pesticides could enter into the cavity locating among the four subdomains of CAT, giving the specific amino acid residues and hydrogen bonds involved in CAT-pesticides interaction. It was also found that the lgK values of pesticides to CAT increased regularly with increasing lgP, Mr, MR and MV, suggesting that the hydrophobicity and steric property of pesticide played essential roles in its binding to CAT.
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Affiliation(s)
- Xijuan Tan
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, 229 North Taibai Road, Xi'an 710069, China
| | - Zhuming Wang
- Key Laboratory of Western Mineral Resources and Geological Engineering of Ministry of Education, College of Earth Sciences and Land Resources, Chang'an University, 126 Yanta Road, Xi'an 710054, China
| | - Donghua Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, 229 North Taibai Road, Xi'an 710069, China
| | - Kai Luo
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, 229 North Taibai Road, Xi'an 710069, China
| | - Xunyu Xiong
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, 229 North Taibai Road, Xi'an 710069, China
| | - Zhenghua Song
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry & Material Science, Northwest University, 229 North Taibai Road, Xi'an 710069, China.
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13
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Katz JR, Day LJ, Day IJ. NMR Investigations of the Interaction Between the Azo-Dye Sunset Yellow and Fluorophenol. J Phys Chem B 2013; 117:11793-800. [DOI: 10.1021/jp407686p] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jonathan R. Katz
- School
of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QJ, United Kingdom
| | - Lucy J. Day
- BHASVIC, 205 Dyke Road, Hove, East Sussex, BN3
6EG, United Kingdom
| | - Iain J. Day
- School
of Life Sciences, University of Sussex, Falmer, Brighton, BN1 9QJ, United Kingdom
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