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Al-Shabib NA, Khan JM, Malik A, Alamri A, Rehman MT, AlAjmi MF, Husain FM. Probing the interaction mechanisms between sunset yellow dye and trypsin protein leading to amorphous aggregation under low pH conditions. Int J Biol Macromol 2024; 265:130442. [PMID: 38417745 DOI: 10.1016/j.ijbiomac.2024.130442] [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: 12/10/2023] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 03/01/2024]
Abstract
Protein aggregation poses a significant concern in the field of food sciences, and various factors, such as synthetic food dyes, can contribute to protein aggregation. One such dye, Sunset Yellow (SY), is commonly employed in the food industry. Trypsin was used as a model protein to assess the impact of SY. We employed several biophysical techniques to examine the binding and aggregation mechanisms between SY and trypsin at different pHs. Results from intrinsic fluorescence measurements indicate a stronger interaction between SY and trypsin at pH 2.0 compared to pH 6.0. Turbidity data reveal trypsin aggregation in the presence of 0.05-3.0 mM SY at pH 2.0, while no aggregation was observed at pH 6.0. Kinetic data demonstrate a rapid, lag-phase-free SY-induced aggregation of trypsin. Circular dichroism analysis reveals that trypsin adopts a secondary structure in the presence of SY at pH 6.0, whereas at pH 2.0, the secondary structure was nearly lost with increasing SY concentrations. Furthermore, turbidity and kinetics data suggest that trypsin aggregation depends on trypsin concentrations and pH. Our study highlights potential health risks associated with the consumption of SY, providing insights into its impact on human health and emphasizing the necessity for further research in this field.
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Affiliation(s)
- Nasser Abdulatif Al-Shabib
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Ajamaluddin Malik
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abdulaziz Alamri
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Md Tabish Rehman
- King Saud University, Department of Pharmacognosy, College of Pharmacy, Riyadh 11451, Saudi Arabia
| | - Mohamed F AlAjmi
- King Saud University, Department of Pharmacognosy, College of Pharmacy, Riyadh 11451, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, Riyadh 11451, Saudi Arabia
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2
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He F, Wan J, Huo C, Li X, Cui Z, Li Y, Liu R, Zong W. New strategies for evaluating imidacloprid-induced biological consequences targeted to Eisenia fetida species and the corresponding mechanisms of its toxicity. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 349:119456. [PMID: 37897899 DOI: 10.1016/j.jenvman.2023.119456] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/04/2023] [Accepted: 10/21/2023] [Indexed: 10/30/2023]
Abstract
Imidacloprid (IMI), a neonicotinoid insecticide, has a wide variety of applications in both agriculture and horticulture. As a result of it massive and repeated use, its traces remained in soil pose severe damage to soil invertebrates, particularly earthworms. Limited information is available regarding the underlying mechanisms of IMI toxicity toward earthworms at the molecular, transcriptional, and cellular levels. Here, Eisenia fetida coelomocytes and key defensive proteins were selected as targeted receptors to explore the toxic mechanisms of oxidative stress-mediated cytotoxicity, genotoxicity, and antioxidant responses induced by IMI stress and the molecular mechanisms underlying the binding of IMI and superoxide dismutase (SOD)/catalase (CAT). Results showed that IMI exposure destroyed the cell membrane integrity of earthworm cells, causing cell damage and cytotoxicity. The intracellular levels of ROS, including ·O2- and H2O2 were induced by IMI exposure, thereby triggering oxidative stress and damage. Moreover, IMI exposure attenuated the antioxidative stress responses (reduced antioxidant capacity and CAT/SOD activities) and caused deleterious effects (enhanced DNA damage, lipid peroxidation (LPO), and protein carbonylation (PCO)) through ROS-mediated oxidative stress pathway. Aberrant gene expression associated with oxidative stress and defense regulation, including CAT, CRT, MT, SOD, GST, and Hsp70 were induced after IMI exposure. Concentration-dependent conformational and structural alterations of CAT/SOD were observed when IMI binding. Also, direct binding of IMI resulted in significant inhibition of CAT/SOD activities in vitro. Molecular simulation showed that IMI preferred to bind to CAT active center through its direct binding with the key residue Tyr 357, while IMI bound more easily to the connecting cavity of two subunits away from SOD active center. In addition, hydrogen bonds and hydrophobic force are the main driving force of IMI binding with CAT/SOD. These findings have implications for comprehensive evaluation of IMI toxicity to soil eco-safety and offer novel strategies to elucidate the toxic mechanisms and pathways of IMI stress.
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Affiliation(s)
- Falin He
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Jingqiang Wan
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Chengqian Huo
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Zhihan Cui
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Yuze Li
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China.
| | - Wansong Zong
- College of Geography and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan, Shandong, 250014, PR China
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Mostafavi ES, Asoodeh A, Chamani J. New insights on the binding of butyl-paraben to trypsin: experimental and computational approaches. J Biomol Struct Dyn 2023; 41:10302-10314. [PMID: 36510660 DOI: 10.1080/07391102.2022.2154268] [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: 08/23/2022] [Accepted: 11/26/2022] [Indexed: 12/15/2022]
Abstract
Butyl-paraben (BP) is one of the most widely used preservatives in numerous foodstuffs, skin care products, and a variety of drugs, and trypsin is the main digestive enzyme, the research on the binding between the two is essential for human health. In the present paper, the effect of BP on trypsin has been explored using experimental and computational techniques to evaluate BP toxicity at the protein level. The obtained results from molecular docking and kinetic assay revealed BP was embedded in the hydrophobic cavity-S1 binding pocket of the enzyme to inhibit its activity by a competitive model. Intrinsic fluorescence of trypsin after interaction with BP revealed the static mode of quenching. FRET indicated that the distance of the enzyme to BP is 1.89 nm with high energy efficiency. Thermodynamic results proved that BP spontaneously bound to trypsin in an enthalpy-driven manner, the van der Waals interactions and H-bonds serving as the predominant forces in binding processes. CD spectroscopy and molecular dynamics (MD) simulation revealed that the trypsin structure transformed from the β-Sheet structure to the unordered Coil structure upon interacting with BP. Resonance light scattering (RLS), synchronous fluorescence, and three-dimensional (3 D) spectroscopies further supported the alteration in the conformation of trypsin. Differential scanning calorimetry (DSC) showed that trypsin was somewhat destabilized in the presence of BP. Accordingly, all of the experimental data were confirmed by MD simulation.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Elham Sadat Mostafavi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ahmad Asoodeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
- Cellular and Molecular Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Jamshidkhan Chamani
- Department of Biology, Faculty of Science, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Huo C, Zhao Q, Liu R, Li X, He F, Jing M, Wan J, Zong W. Cytotoxicity and Oxidative Stress Effects of Indene on Coelomocytes of Earthworm ( Eisenia foetida): Combined Analysis at Cellular and Molecular Levels. TOXICS 2023; 11:136. [PMID: 36851011 PMCID: PMC9961689 DOI: 10.3390/toxics11020136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Indene (IND) is a kind of important aromatic hydrocarbon that is extracted from coal tar and has important applications in industry and biology. In the process of production and utilization, it is easy to enter the soil and produce toxic effects on the soil or organisms. The earthworm is an important organism in the soil. The toxicity of indene on earthworm coelomocytes is rarely studied, and the oxidative stress effects of IND on earthworm coelomocytes remain unclear. In this study, coelomocytes from earthworms and antioxidant enzymes were selected as the research targets. In addition, IND caused oxidative stress, and its related toxic effects and mechanisms were systematically studied and evaluated at the cellular and molecular levels. The results showed that IND destroyed the redox balance in earthworm coelomocytes, and the large accumulation of reactive oxygen species (ROS) significantly inhibited the activities of the antioxidant system, including superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), and caused lipid peroxidation and membrane permeability changes, resulting in a decrease in cell viability to 74.5% of the control group. At the molecular level, IND was bound to SOD by the arene-H bond, and the binding constant was 4.95 × 103. IND changed the secondary structure of the SOD and led to a loosening of the structure of the SOD peptide chain. Meanwhile, IND caused SOD fluorescence sensitization, and molecular simulation showed that IND was mainly bound to the junction of SOD subunits. We hypothesized that the changes in SOD structure led to the increase in SOD activity. This research can provide a scientific basis for IND toxicity evaluation.
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Affiliation(s)
- Chengqian Huo
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Qiang Zhao
- Shandong Provincial Eco-Environment Monitoring Center, 3377 Jingshi Dong Lu, Jinan 250100, China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Falin He
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Mingyang Jing
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Jingqiang Wan
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Wansong Zong
- College of Population, Resources and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan 250014, China
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5
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Xiao Q, Luo H, Cao H, Li B, Liu J, Liu Y, Huang S. Investigation on conformational variation and enzymatic activity of trypsin affected by Ti 3C 2 QDs via spectroscopic technique and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121878. [PMID: 36183537 DOI: 10.1016/j.saa.2022.121878] [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: 07/04/2022] [Revised: 09/01/2022] [Accepted: 09/10/2022] [Indexed: 06/16/2023]
Abstract
In this paper, Ti3C2 quantum dots (Ti3C2 QDs) were synthesized by simply treating Ti3C2 MXene powder with acid and base via hydrothermal method. Ti3C2 QDs exhibited superior fluorescence property and were used for the fluorescent imaging of living HeLa cells successfully. In order to evaluate the influence of Ti3C2 QDs on protease with specific biological functions, binding interaction of Ti3C2 QDs with trypsin was studied comprehensively and deeply through spectroscopic strategies and molecular modeling technique. The intrinsic fluorescence of trypsin was spontaneously quenched by Ti3C2 QDs through static quenching mode under van der Waals interaction force, and Ti3C2 QDs bound with the inactive residue domain of trypsin firmly with stoichiometric ratio of 1:1. Ti3C2 QDs induced the microenvironmental variation of the amino acid residues in trypsin, reducing the thermal stability of trypsin significantly. Gel electrophoresis experiments and microscopic imaging experiments demonstrated that Ti3C2 QDs inhibited the enzymatic activity of trypsin on the digestion of human serum albumin and HeLa cells obviously. These results revealed not only the deep interaction mechanism between Ti3C2 QDs and protease but also the influence of Ti3C2 QDs on the enzymatic activity of trypsin, paving the way for the safe biological application of Ti3C2 QDs in the diagnosis and the therapy of protease-related diseases.
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Affiliation(s)
- Qi Xiao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
| | - Huajian Luo
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Huishan Cao
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Bo Li
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Jiajia Liu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China
| | - Yi Liu
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China; State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300378, PR China
| | - Shan Huang
- Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University, Nanning 530001, PR China.
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6
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Maheri H, Hashemzadeh F, Shakibapour N, Kamelniya E, Malaekeh-Nikouei B, Mokaberi P, Chamani J. Glucokinase activity enhancement by cellulose nanocrystals isolated from jujube seed: A novel perspective for type II diabetes mellitus treatment (In vitro). J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Sadat Mostafavi E, Asoodeh A, Chamani J. Evaluation of interaction between Ponceau 4R (P4R) and trypsin using kinetic, spectroscopic, and molecular dynamics simulation methods. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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8
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Khayyat AIA, Zargar S, Wani TA, Rehman MU, Khan AA. Association Mechanism and Conformational Changes in Trypsin on Its Interaction with Atrazine: A Multi- Spectroscopic and Biochemical Study with Computational Approach. Int J Mol Sci 2022; 23:ijms23105636. [PMID: 35628445 PMCID: PMC9146720 DOI: 10.3390/ijms23105636] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/15/2022] [Accepted: 05/16/2022] [Indexed: 02/01/2023] Open
Abstract
Atrazine (ATR) is a herbicide globally used to eliminate undesired weeds. Herbicide usage leads to various adverse effects on human health and the environment. The primary source of herbicides in humans is the food laced with the herbicides. The ATR binding to trypsin (TYP) was investigated in this study to explore its binding potential and toxicity. In vitro interaction of ATR with TYP was studied using multi-spectroscopic methods, molecular docking, and enzyme kinetics to explore the mechanism of binding for the TYP-ATR system. The TYP-ATR complex revealed binding constants (103 M-1), suggesting a moderate binding. The free energy for the TYP-ATR complexes was negative, suggesting a spontaneous interaction. Thermodynamic parameters enthalpy (ΔH) and entropy (ΔS) obtained positive values for the TYP-ATR system suggesting hydrophobic interactions in the binding process. Micro-environmental and conformational changes in TYP molecules were induced on interaction with ATR. Reduced catalytic activity of TYP was observed after interaction with ATR owing to the changes in the secondary structure of the TYP.
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Affiliation(s)
- Arwa Ishaq A. Khayyat
- Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Seema Zargar
- Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
- Correspondence: (S.Z.); (T.A.W.)
| | - Tanveer A. Wani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
- Correspondence: (S.Z.); (T.A.W.)
| | - Muneeb U. Rehman
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Azmat Ali Khan
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
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9
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Calapoglu F, Sahin S, Ozmen I, Ozbek Yazici S. Investigation of interaction between dexamethasone/pheniramine and trypsin by fluorescence, UV-vis, CD, and molecular docking. J Biomol Struct Dyn 2022; 41:2202-2210. [PMID: 35098895 DOI: 10.1080/07391102.2022.2029565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Antihistamines and glucocorticoids are commonly used to treat allergy symptoms and the inflammatory conditions. In present study, the in-vitro binding interactions a glucocortikoid, dexamethasone/an antihistamine, pheniramine with TSN (TSN) secreted from pancreas to small intestine for protein digestion were investigated by fluorescence emission spectroscopy (FES), UV-Vis spectroscopy, synchronous fluorescence spectroscopy (SFS), CD spectroscopy, FT-IR and molecular modeling methods. Also, the effect of these drugs on the catalytic activity of trypsin (TSN) was determined. The fluorescence quenching experiments indicated that each drugs quenched the intrinsic fluorescence of TSN with their increased concentrations. The results of SFS and UV-Vis spectra proved the interaction of dexamethasone and pheniramine with TSN. CD spectra showed that the secondary structure of enzyme was altered in the presence of the drugs. All these spectroscopy results were validated and explained by molecular docking and molecular dynamic simulation (MD) studies. The IC50 values were determined as 0.0049 mM and 0.0038 mM for dexamethasone and pheniramine, respectively. So, both drugs have inhibition effect on the catalytic activity of TSN. The results of this study can provide valuable information in the field of pharmacokinetics and pharmacodynamics.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Furkan Calapoglu
- Faculty of Arts and Sciences, Department of Chemistry, Suleyman Demirel University, Cunur, Isparta, Turkey
| | - Selmihan Sahin
- Faculty of Arts and Sciences, Department of Chemistry, Suleyman Demirel University, Cunur, Isparta, Turkey
| | - Ismail Ozmen
- Faculty of Arts and Sciences, Department of Chemistry, Suleyman Demirel University, Cunur, Isparta, Turkey
| | - Sercan Ozbek Yazici
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Burdur Mehmet Akif Ersoy University, Istiklal Yerleskesi, Burdur, Turkey
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10
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Song Y, Sun K, Liu R. An exploration of the interaction mechanism of Direct Red 80 with α-Amylase at the molecular level. J Mol Recognit 2020; 34:e2883. [PMID: 33331039 DOI: 10.1002/jmr.2883] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/04/2020] [Accepted: 11/23/2020] [Indexed: 12/23/2022]
Abstract
The use and production of Direct Red 80 (DR80) dye are growing rapidly, and a large amount of dye wastewater is discharged into the soil without treatment. DR80 accumulated in soil or sludge can lead to enzyme poisoning, inhibit microbial activity, and affect the transformation of substances in the soil. In this research, the interaction mechanism between DR80 and α-Amylase (a typical enzyme in soil and sludge) was investigated by multi-spectra, molecular docking, thermodynamics analysis and enzyme activity experiment. The results of UV-visible and resonance light scattering (RLS) spectra showed that the skeleton of α-Amylase became loosened and unfolded under the exposure of Direct Red. The size of α-Amylase was smaller and α-Amylase became dispersed under high concentration of DR80. Molecular docking and thermodynamic analysis showed that DR80 bound to the surface of domain A rather than the active site of α-Amylase in the form of hydrogen bonds, and the binding process was an exothermic reaction. In addition, the inhibition of α-Amylase activity by DR80 was verified by enzyme activity experiment. These results indicate that DR80 has an effect on the structure and function of α-Amylase at molecular level, which means that the toxicity of DR80 should receive more attention.
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Affiliation(s)
- Yan Song
- School of Water Conservancy and Environment, University of Jinan, Jinan, China
| | - Kailun Sun
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Qingdao, China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Qingdao, China
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11
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Ren G, Sun H, Li G, Fan J, Du L, Cui G. Interaction mechanism of aloe-emodin with trypsin: molecular structure-affinity relationship and effect on biological activities. RSC Adv 2020; 10:20862-20871. [PMID: 35517743 PMCID: PMC9054315 DOI: 10.1039/d0ra02712j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 05/13/2020] [Indexed: 12/23/2022] Open
Abstract
The molecular mechanism of interaction between aloe-emodin (AE) and trypsin was investigated, exhibiting remarkable outcomes. To detect the interaction mechanism, the binding of AE with trypsin was examined by a multi-spectroscopy and molecular docking method. Results showed that the binding of AE and trypsin would lead to static quenching and their binding forces were van der Waals forces and hydrogen bonding. The results of simultaneous and three-dimensional fluorescence spectroscopy showed that the combination of AE and trypsin caused changes in the microenvironment around the trypsin fluorophore, which might change the spatial structure of trypsin. FT-IR spectroscopy showed that the contents of α-helix and β-turn in trypsin were decreased and the contents of β-sheet, random coil and antiparallel β-sheet were increased. Moreover, all these experimental results were verified and reasonably explained by molecular docking results. We also investigated the enzyme activity of trypsin and the antioxidant activity of AE. The results showed that both the enzyme activity of trypsin and the antioxidant activity of AE were decreased after interaction between AE and trypsin. The findings outlined in this study should elucidate the molecular mechanisms of interaction between AE and trypsin and contribute to making full use of AE in the food industry.
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Affiliation(s)
- Guoyan Ren
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597.,Henan Engineering Research Center of Food Material Luoyang 471023 China.,National Demonstration Center for Experimental Food Processing and Safety Education Luoyang 471023 China
| | - He Sun
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597
| | - Gen Li
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597
| | - Jinling Fan
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597
| | - Lin Du
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597
| | - Guoting Cui
- College of Food and Bioengineering, Henan University of Science and Technology Luoyang 471023 China +86-15937969597
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12
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Liu M, Liu T, Shi Y, Zhao Y, Yan H, Sun B, Wang Q, Wang Z, Han J. Comparative study on the interaction of oxyresveratrol and piceatannol with trypsin and lysozyme: binding ability, activity and stability. Food Funct 2020; 10:8182-8194. [PMID: 31696185 DOI: 10.1039/c9fo01888c] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Natural polyphenols showing a variety of beneficial effects will interact with multiple proteases after administration. The interactions of oxyresveratrol and piceatannol with trypsin and lysozyme were investigated using fluorescence spectroscopy, UV-vis absorption spectroscopy, circular dichroism spectroscopy, differential scanning calorimetry and molecular docking. Fluorescence quenching results and UV-vis absorption difference spectra revealed that the quenching process was a static mode initiated by ground-state complex formation. The different binding ability of oxyresveratrol and piceatannol with trypsin and lysozyme was discussed based on their different molecular structures. Moreover, the major driving force for the binding process was elucidated as hydrogen bonding and van der Waals forces by the negative enthalpy and entropy changes. Synchronous fluorescence, three-dimensional fluorescence and circular dichroism spectral analysis suggested that the binding of oxyresveratrol and piceatannol to trypsin and lysozyme induced some microenvironmental and conformational changes of the two enzymes. The thermal stability of the enzymes in the presence of polyphenols was studied based on the change in melting temperature by differential scanning calorimetry. The above experimental results were validated by the protein-ligand docking studies which showed the location of the two ligands in the enzymes and the surrounding amino acid residues. Furthermore, enzyme activity assays indicated that the enzymatic activity of trypsin and lysozyme was inhibited by oxyresveratrol and piceatannol. The effect of trypsin and lysozyme on the antioxidant activity and stability of oxyresveratrol and piceatannol was also investigated. In conclusion, the comparative study on the interaction of oxyresveratrol and piceatannol with trypsin and lysozyme showed that the positions of hydroxyl groups of the polyphenols had an important influence on their interaction with enzymes and their antioxidant activity and stability as well as the enzyme activities. The obtained results are expected to provide a theoretical basis for the application of polyphenols in functional foods and pharmaceuticals.
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Affiliation(s)
- Min Liu
- Institute of BioPharmceutical Research, Liaocheng University, Liaocheng 252059, China.
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13
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Pramanik U, Khamari L, Shekhar S, Mukherjee S. On the role of hydrophobic interactions between chloramphenicol and bovine pancreatic trypsin: The effect of a strong electrolyte. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137137] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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14
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Jesna KK, Ilanchelian M. Gold nanorods–trypsin biocorona: a novel nano composite for in vitro cytotoxic activity towards MCF-7 and A-549 cancer cells. NEW J CHEM 2020. [DOI: 10.1039/d0nj03299a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In the present work, we have synthesized cetyltrimethyl ammonium bromide (CTAB) capped gold nanorods (Au NRs) to evaluate apparent binding affinities for the adsorption of trypsin (TRP).
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15
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Huo M, Zhao L, Wang T, Zong W, Liu R. Binding mechanism of maltol with catalase investigated by spectroscopy, molecular docking, and enzyme activity assay. J Mol Recognit 2019; 33:e2822. [PMID: 31692112 DOI: 10.1002/jmr.2822] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/06/2019] [Accepted: 10/08/2019] [Indexed: 12/26/2022]
Abstract
Maltol is a flavor additive that is widely used in the daily diet of humans, and its biosafety attention is concomitantly increasing. Catalase (CAT) is an antioxidant enzyme to maintain homeostasis in the tissue's environment of human body and protect cells from oxidative damages. The adverse effects of maltol to CAT activity within mouse hepatocytes as well as the structural and functional changes of CAT on molecular level were investigated by multiple spectroscopy techniques, enzyme activity experiments, and molecular docking. Results suggested that when the maltol concentrations reached to 8 × 10-5 mol L-1 , the viability of hepatocytes decreased to 93%, and CAT activity was stimulated by maltol to 111% than the control group after exposure for 24 hours. Changes in CAT activity on molecular level were consistent with those on cellular level. The fluorescence quenching of CAT by maltol was static with the forming of maltol-CAT complex. Moreover, ultraviolet-visible (UV-visible) absorption, synchronous fluorescence, and circular dichroism (CD) spectra reflected that the presence of maltol caused conformational change of CAT and made the CAT molecule skeleton loose and increased α-helix of CAT. Maltol mainly bound with CAT through hydrogen bond, and binding site that is near the heme ring in the enzyme activity center did not interact with its main amino acid residues. This study explores the combination between maltol and CAT, providing references for evaluating health damages caused by maltol.
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Affiliation(s)
- Mengling Huo
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, China
| | - Lining Zhao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, China
| | - Ting Wang
- Jinan Environment Monitoring Center, Jinan Ecological Environment Bureau of Shandong Province, Jinan, China
| | - Wansong Zong
- College of Geography and Environment, Shandong Normal University, Jinan, China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, China
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16
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Zhao L, Guo D, Lin J, Liu R. Responses of catalase and superoxide dismutase to low-dose quantum dots on molecular and cellular levels. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 181:388-394. [PMID: 31212187 DOI: 10.1016/j.ecoenv.2019.06.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/06/2019] [Accepted: 06/09/2019] [Indexed: 06/09/2023]
Abstract
With the wider application of cadmium-containing quantum dots (Cd-QDs) in biomedical fields, it is easier for people to be exposed. Studies have suggested that Cd-QDs could release cadmium ion and induce oxidative effects due to the disruption of redox equilibrium. Antioxidant enzymes catalase (CAT) and superoxide dismutase (SOD), play an important role in organisms to resist the negative impact of exogenous substances. Molecular mechanisms of antioxidant enzymes with Cd-QDs remain unclear, however. In this study, structural and functional changes of CAT and SOD have been investigated under low dose Cd-QDs exposure. Cell viability, malondialdehyde (MDA) level, CAT and SOD activities were influenced by Cd-QDs in hepatocytes of mice. To further investigate the responses of CAT and SOD to Cd-QDs, multiple spectroscopic, calorimetric and activity measurements were carried out. Similar interaction patterns were observed that result in interaction force, structural and functional changes: Cd-QDs combine with CAT and SOD through hydrophobic forces; Intrinsic fluorescence of proteins was statically quenched by Cd-QDs and new complexes were formed; Also, the skeleton and secondary structure (with α-helix decrease) of CAT and SOD was influenced. Taken together, we suggest that Cd-QDs chosen in this study induce oxidative stress effects to hepatocytes but have not caused serious oxidative stress damage at concentrations below 10 μg/mL. MPA-CdSe/ZnS QDs caused the lowest level of oxidative stress which is associated with the induction of antioxidant proteins. This paper presents responses of CAT and SOD to low-dose Cd-QDs, and provides a reference for evaluating health damages caused by Cd-QDs.
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Affiliation(s)
- Lining Zhao
- School of Environmental Science and Engineering, Shandong University, China -America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China
| | - Dandan Guo
- Digital Management Center of Urban Underground Pipelines, Qixia Branch of Nanjing Planning Bureau, Jiangsu Province, 118# Wenyuan Road, Nanjing, 210046, PR China
| | - Jing Lin
- North China Sea Data & Information Service of SOA, 27# Yunling Road, Laoshan, Qingdao, 266061, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China -America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong, 266237, PR China.
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17
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Gao S, Cao Z, Niu Q, Zong W, Liu R. Probing the toxicity of long-chain fluorinated surfactants: Interaction mechanism between perfluorodecanoic acid and lysozyme. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.134] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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18
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Zhao L, Zhang H, Zhang J, Zong W, Liu R. Spectroscopic characterization, calorimetric study and molecular docking to evaluate the bioconjugation of maltol with hemoglobin. LUMINESCENCE 2019; 34:290-296. [PMID: 30723991 DOI: 10.1002/bio.3607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/01/2018] [Accepted: 12/06/2018] [Indexed: 11/12/2022]
Abstract
Maltol, a food additive, is extensively used in our daily life. To date, its biological safety is still debated. In this article, binding interaction of maltol with bovine hemoglobin (BHb), an important functional protein, was studied by molecular docking research and spectroscopic and calorimetric measurements. We found that maltol could cause structural changes of BHb. By interacting with Glu 101 (1.27 Å) and Lys 104 (2.49 Å) residues, maltol changed the cavity structure and induced a microenvironment change around tryptophan (Trp) residue. Thermodynamic parameters obtained from isothermal titration calorimetry (ITC) measurement showed that hydrophobic forces were the main forces existing in this system. The association constant of K (8.0 ± 3.4 × 104 M-1 ) shows the mild ligand-protein binding for maltol with BHb. The α-helix amount in BHb increased (59.6-62.6%) with different concentrations of maltol and the intrinsic fluorescence intensity was quenched by maltol, indicating the conformation changes and denaturation of BHb. This work presents the interactions of maltol with BHb at the molecular level and obtains evidence that maltol induces adverse effects to proteins in vitro.
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Affiliation(s)
- Lining Zhao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, P. R. China
| | - Hao Zhang
- Laboratory of Immunology for Environment and Health, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Science), Jinan, P. R. China
| | - Jing Zhang
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, P. R. China
| | - Wansong Zong
- College of Population, Resources and Environment, Shandong Normal University, Jinan, P. R. China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, Qingdao, P. R. China
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19
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Lin J, Xu Y, Wang Y, Huang S, Li J, Meti MD, Xu X, Hu Z, Liu J, He Z, Xu H. Dissection of binding of trypsin to its natural inhibitor Gensenoside-Rg1 using spectroscopic methods and molecular modeling. J Biomol Struct Dyn 2018; 37:4070-4079. [DOI: 10.1080/07391102.2018.1539411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Jialiang Lin
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Yang Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
- School of Science and Engineering, Chinese University of Hong Kong, Shenzhen, China
| | - Yuhan Wang
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Songyang Huang
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Junwei Li
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Manjunath D. Meti
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Xu Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Zhangli Hu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
| | - Johnson Liu
- School Medical Sciences, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia
| | - Zhendan He
- School of Medicine, Shenzhen University, Shenzhen, China
| | - Hong Xu
- College of Life Sciences and Oceanography, Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, Shenzhen University, Shenzhen, China
- Key Laboratory of RF Circuits and Systems of Ministry of Education, Hangzhou Dianzi University, Hangzhou, China
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20
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Meti MD, Lin J, Wang Y, Wu Z, Xu H, Xu X, Han Q, Ying M, Hu Z, He Z. Trypsin inhibition by Ligupurpuroside B as studied using spectroscopic, CD, and molecular docking techniques. J Biomol Struct Dyn 2018; 37:3379-3387. [PMID: 30213239 DOI: 10.1080/07391102.2018.1515115] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
It is well known that Ligupurpuroside B is a water-soluble polyphenolic compound and used to brew bitter tea with antioxidant activities. It acted as a stimulant to the central nervous system and a diuretic (increase the excretion of urine), was used to treat painful throat and high blood pressure, and also exerted weight-loss function. In this regard, a detailed investigation on the mechanism of interaction between Ligupurpuroside B and trypsin could be of great interest to know the pharmacokinetic behavior of Ligupurpuroside B and for the design of new analogues with effective pharmacological properties. Ligupurpuroside B successfully quenched the intrinsic fluorescence of trypsin via static quenching mechanism. The binding constants (Ka) at three temperatures (288, 298, and 308 K) were 1.7841 × 104, 1.6251 × 104 and 1.5483 × 104 L mol-1, respectively. Binding constants revealed the stronger binding interaction between Ligupurpuroside B and trypsin. The number of binding sites approximated to one, indicating a single class of binding for Ligupurpuroside B in trypsin. The enzyme activity result suggested that Ligupurpuroside B can inhibit trypsin activity. Thermodynamic results revealed that both hydrogen bonds and hydrophobic interactions play main roles in stabilization of Ligupurpuroside B-trypsin complex. Circular dichroism (CD) results showed that the conformation of trypsin changed after bound to ligupurpuroside B. Molecular docking indicated that Ligupurpuroside B can enter the hydrophobic cavity of trypsin and was located near Trp215 and Tyr228 of trypsin. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Manjunath D Meti
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Jialiang Lin
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Yuhan Wang
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Zhibing Wu
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Hong Xu
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Xu Xu
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Qingguo Han
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Ming Ying
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Zhangli Hu
- a Shenzhen Key Laboratory of Marine Bioresources and Ecology/Shenzhen Key Laboratory of Microbial Genetic Engineering, College of Life Sciences and Oceanography , Shenzhen University , Shenzhen , China.,b Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering , Shenzhen University , Shenzhen , China
| | - Zhendan He
- c School of Medicine , Shenzhen University , Shenzhen , China
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21
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Zhang X, Zhang R, Zong W, Liu R. Interactions of three bisphenol analogues with hemoglobin investigated by spectroscopy and molecular docking. J Mol Recognit 2018; 32:e2758. [DOI: 10.1002/jmr.2758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 06/21/2018] [Accepted: 06/30/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Xun Zhang
- School of Environmental Science and EngineeringShandong University, China‐America CRC for Environment & Health, Shandong Province Qingdao Shandong China
| | - Rui Zhang
- School of Environmental Science and EngineeringShandong University, China‐America CRC for Environment & Health, Shandong Province Qingdao Shandong China
| | - Wansong Zong
- College of Population, Resources and EnvironmentShandong Normal University Jinan Shandong China
| | - Rutao Liu
- School of Environmental Science and EngineeringShandong University, China‐America CRC for Environment & Health, Shandong Province Qingdao Shandong China
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22
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Millan S, Kumar A, Satish L, Susrisweta B, Dash P, Sahoo H. Insights into the binding interaction between copper ferrite nanoparticles and bovine serum albumin: An effect on protein conformation and activity. LUMINESCENCE 2018; 33:990-998. [DOI: 10.1002/bio.3499] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 03/22/2018] [Accepted: 04/05/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Sabera Millan
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
| | - Aniket Kumar
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
| | - Lakkoji Satish
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
| | - B. Susrisweta
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
| | - Priyabrat Dash
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
| | - Harekrushna Sahoo
- Department of Chemistry, National Institute of Technology (NIT); Rourkela Odisha India
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23
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Fan Y, Xu Y, Han QG, Shen LL, Xu H, Wu ZB, Xu X, Ying M, He ZD, Hu ZL. Exploring inhibition mechanism and nature of lipase by Ligupurpuroside A extracted from Ku-Ding tea. Med Chem Res 2018. [DOI: 10.1007/s00044-018-2194-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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24
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Zhao L, Hu S, Meng Q, Xu M, Zhang H, Liu R. The binding interaction between cadmium-based, aqueous-phase quantum dots with Candida rugosa
lipase. J Mol Recognit 2018; 31:e2712. [DOI: 10.1002/jmr.2712] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 01/24/2018] [Accepted: 02/18/2018] [Indexed: 02/05/2023]
Affiliation(s)
- Lining Zhao
- School of Environmental Science and Engineering; Shandong University, China-America CRC for Environment & Health, Shandong Province; Jinan P. R. China
| | - Shimeng Hu
- School of Environmental Science and Engineering; Shandong University, China-America CRC for Environment & Health, Shandong Province; Jinan P. R. China
| | - Qiwei Meng
- School of Environmental Science and Engineering; Shandong University, China-America CRC for Environment & Health, Shandong Province; Jinan P. R. China
| | - Mengchen Xu
- School of Environmental Science and Engineering; Shandong University, China-America CRC for Environment & Health, Shandong Province; Jinan P. R. China
| | - Hao Zhang
- Laboratory of Immunology for Environment and Health, Shandong Analysis and Test Center; Qilu University of Technology (Shandong Academy of Sciences); Jinan China
| | - Rutao Liu
- School of Environmental Science and Engineering; Shandong University, China-America CRC for Environment & Health, Shandong Province; Jinan P. R. China
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25
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Gao S, Liu R. Comprehensive insights into the interaction mechanism between perfluorodecanoic acid and human serum albumin. NEW J CHEM 2018. [DOI: 10.1039/c8nj00124c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this investigation, we explored the toxic effects of perfluorodecanoic acid (PFDA) on human serum albumin (HSA), established the interaction mode of PFDA with HSA, and provided a new strategy for the evaluation of toxicity of PFDA on functional proteins.
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Affiliation(s)
- Sichen Gao
- School of Environmental Science and Engineering
- Shandong University
- Shandong Province
- Jinan 250100
- China
| | - Rutao Liu
- School of Environmental Science and Engineering
- Shandong University
- Shandong Province
- Jinan 250100
- China
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26
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Wu Q, Wan J, He Z, Liu R. Spectroscopic investigations on the conformational changes of lysozyme effected by different sizes of N-acetyl-l-cysteine-capped CdTe quantum dots. J Biochem Mol Toxicol 2017; 31. [PMID: 28902442 DOI: 10.1002/jbt.21982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 08/16/2017] [Accepted: 08/19/2017] [Indexed: 11/11/2022]
Abstract
The effect of N-acetyl-l-cysteine-capped CdTe quantum dots (NAC-CdTe QDs) with different sizes on lysozyme was investigated by isothermal titration calorimetry (ITC), enzyme activity assays, and multi-spectroscopic methods. ITC results proved that NAC-CdTe QDs can spontaneously bind with lysozyme and hydrophobic force plays a major role in stabilizing QDs-lysozyme complex. Multi-spectroscopic measurements revealed that NAC-CdTe QDs caused strong quenching of the lysozyme's fluorescence in a size-dependent quenching manner. Moreover, the changes of secondary structure and microenvironment in lysozyme caused by the NAC-CdTe QDs were higher with a bigger size. The results of enzyme activity assays showed that the interaction between lysozyme and NAC-CdTe QDs inhibited the activity of lysozyme and the inhibiting effect was in a size-dependent manner. Based on these results, we conclude that NAC-CdTe QDs with larger particle size had a larger impact on the structure and function of lysozyme.
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Affiliation(s)
- Qianqian Wu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
| | - Jingqiang Wan
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
| | - Zhuo He
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
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27
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Guo D, Liu R. Spectroscopic investigation of the effects of aqueous-phase prepared CdTe quantum dots on protein hemoglobin at the molecular level. J Biochem Mol Toxicol 2017; 31. [PMID: 28661553 DOI: 10.1002/jbt.21953] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 06/01/2017] [Accepted: 06/16/2017] [Indexed: 11/06/2022]
Abstract
3-Mercaptopropionic Acid-modified CdTe quantum dots (QDs) were synthesized and characterized by infrared, fluorescence, and ultraviolet-visible absorption spectra and Nano-ZetaSizer measurements. Then the interaction between QDs and hemoglobin was studied to investigate the effects of QDs on the structure and function of hemoglobin by using a variety of spectroscopy methods and isothermal titration calorimetry. The results showed van der Waals forces and hydrogen bonding predominantly played major roles in the binding. The intrinsic fluorescence of hemoglobin was quenched with changes to the microenvironment of tyrosine and tryptophan residues and complex conformational changes of hemoglobin were induced with the loosening and unfolding skeleton. However, the heme in hemoglobin was still stable, indicating that the main physiological function of hemoglobin might not be significantly inhibited. This study will provide a new strategy to study the biological toxicity of QDs at the molecular level.
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Affiliation(s)
- Dandan Guo
- School of Environmental Science and Engineering, Shandong University, China -America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China -America CRC for Environment & Health, Shandong Province, Jinan, 250100, People's Republic of China
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28
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Liu Y, Zhang G, Zeng N, Hu S. Interaction between 8-methoxypsoralen and trypsin: Monitoring by spectroscopic, chemometrics and molecular docking approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:188-195. [PMID: 27653277 DOI: 10.1016/j.saa.2016.09.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 08/28/2016] [Accepted: 09/14/2016] [Indexed: 06/06/2023]
Abstract
8-Methoxypsoralen (8-MOP) is a naturally occurring furanocoumarin with various biological activities. However, there is little information on the binding mechanism of 8-MOP with trypsin. Here, the interaction between 8-MOP and trypsin in vitro was determined by multi-spectroscopic methods combined with the multivariate curve resolution-alternating least squares (MCR-ALS) chemometrics approach. An expanded UV-vis spectral data matrix was analysed by MCR-ALS, the concentration profiles and pure spectra for the three reaction species (trypsin, 8-MOP and 8-MOP-trypsin) were obtained to monitor the interaction between 8-MOP and trypsin. The fluorescence data suggested that a static type of quenching mechanism occurred in the binding of 8-MOP to trypsin. Hydrophobic interaction dominated the formation of the 8-MOP-trypsin complex on account of the positive enthalpy and entropy changes, and trypsin had one high affinity binding site for 8-MOP with a binding constant of 3.81×104Lmol-1 at 298K. Analysis of three dimensional fluorescence, UV-vis absorption and circular dichroism spectra indicated that the addition of 8-MOP induced the rearrangement of the polypeptides carbonyl hydrogen-bonding network and the conformational changes in trypsin. The molecular docking predicted that 8-MOP interacted with the catalytic residues His57, Asp102 and Ser195 in trypsin. The binding patterns and trypsin conformational changes may result in the inhibition of trypsin activity. This study has provided insights into the binding mechanism of 8-MOP with trypsin.
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Affiliation(s)
- Yingying Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Guowen Zhang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
| | - Ni Zeng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Song Hu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
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29
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Wu Z, Shen L, Han Q, Lu J, Tang H, Xu X, Xu H, Huang F, Xie J, He Z, Zeng Z, Hu Z. Mechanism and Nature of Inhibition of Trypsin by Ligupurpuroside A, a Ku-Ding Tea Extract, Studied by Spectroscopic and Docking Methods. FOOD BIOPHYS 2016. [DOI: 10.1007/s11483-016-9465-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Zhang R, Liu R, Zong W. Bisphenol S Interacts with Catalase and Induces Oxidative Stress in Mouse Liver and Renal Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2016; 64:6630-40. [PMID: 27508457 DOI: 10.1021/acs.jafc.6b02656] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Bisphenol S (BPS) is present in multitudinous consumer products and detected in both food and water. It also has been a main substitute for bisphenol A (BPA) in the food-packaging industry. Yet, the toxicity of BPS is not fully understood. The present study of the toxicity of BPS was divided into two parts. First, oxidative stress, cell viability, apoptosis level, and catalase (CAT) activity in mouse hepatocytes and renal cells were investigated after BPS exposure. After 12 h of incubation with BPS, all of these parameters of hepatocytes and renal cells changed by >15% as the concentration of BPS ranged from 0.1 to 1 mM. Second, the direct interaction between BPS and CAT on the molecule level was investigated by multiple spectral methods and molecular docking investigations. BPS changed the structure and the activity of CAT through binding to the Gly 117 residue on the substrate channel of the enzyme. The main binding forces were hydrogen bond and hydrophobic force.
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Affiliation(s)
- Rui Zhang
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province , 27# Shanda South Road, Jinan 250100, People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province , 27# Shanda South Road, Jinan 250100, People's Republic of China
| | - Wansong Zong
- College of Population, Resources and Environment, Shandong Normal University , 88# East Wenhua Road, Jinan 250014, People's Republic of China
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Song W, Yu Z, Hu X, Liu R. Dissection of the binding of hydrogen peroxide to trypsin using spectroscopic methods and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:286-293. [PMID: 25228036 DOI: 10.1016/j.saa.2014.08.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 06/30/2014] [Accepted: 08/21/2014] [Indexed: 06/03/2023]
Abstract
Studies on the effects of environmental pollutants to protein in vitro has become a global attention. Hydrogen peroxide (H2O2) is used as an effective food preservative and bleacher in industrial production. The toxicity of H2O2 to trypsin was investigated by multiple spectroscopic techniques and the molecular docking method at the molecular level. The intrinsic fluorescence of trypsin was proved to be quenched in a static process based on the results of fluorescence lifetime experiment. Hydrogen bonds interaction and van der Waals forces were the main force to generate the trypsin-H2O2 complex on account of the negative ΔH(0) and ΔS(0). The binding of H2O2 changed the conformational structures and internal microenvironment of trypsin illustrated by UV-vis absorption, fluorescence, synchronous fluorescence, three-dimensional (3D) fluorescence and circular dichroism (CD) results. However, the binding site was far away from the active site of trypsin and the trypsin activity was only slightly affected by H2O2, which was further explained by molecular docking investigations.
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Affiliation(s)
- Wei Song
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 27# Shanda South Road, Jinan 250100, Shandong Province, PR China
| | - Zehua Yu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 27# Shanda South Road, Jinan 250100, Shandong Province, PR China
| | - Xinxin Hu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 27# Shanda South Road, Jinan 250100, Shandong Province, PR China
| | - Rutao Liu
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 27# Shanda South Road, Jinan 250100, Shandong Province, PR China.
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Wang Y, Zhang G, Wang L. Potential toxicity of phthalic acid esters plasticizer: interaction of dimethyl phthalate with trypsin in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:75-84. [PMID: 25496445 DOI: 10.1021/jf5046359] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Dimethyl phthalate (DMP) is widely used as a plasticizer in industrial processes and has been reported to possess potential toxicity to the human body. In this study, the interaction between DMP and trypsin in vitro was investigated. The results of fluorescence, UV–vis, circular dichroism, and Fourier transform infrared spectra along with cyclic voltammetric measurements indicated that the remarkable fluorescence quenching and conformational changes of trypsin resulted from the formation of a DMP–trypsin complex, which was driven mainly by hydrophobic interactions. The molecular docking and trypsin activity assay showed that DMP primarily interacted with the catalytic triad of trypsin and led to the inhibition of trypsin activity. The dimensions of the individual trypsin molecules were found to become larger after binding with DMP by atomic force microscopy imaging. This study offers a comprehensive picture of DMP–trypsin interaction, which is expected to provide insights into the toxicological effect of DMP.
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Li X, Yang Z. Dissection of the binding ofl-ascorbic acid to trypsin and pepsin using isothermal titration calorimetry, equilibrium microdialysis and spectrofluorimetry. RSC Adv 2015. [DOI: 10.1039/c5ra02592c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Clear and quantitative information on the nature ofl-ascorbic acid interaction with trypsin/pepsin should provide a firm base for its rational use in clinical practice.
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Affiliation(s)
- Xiangrong Li
- Department of Chemistry
- School of Basic Medicine
- Xinxiang Medical University
- Xinxiang
- P. R. China
| | - Zhijun Yang
- Department of Chemistry
- School of Basic Medicine
- Xinxiang Medical University
- Xinxiang
- P. R. China
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