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Nudrat S, Maity B, Quraishi S, Karankumar I, Kumari K, Jana M, Singha Roy A. Binding Interaction of Coumarin Derivative Daphnetin with Ovalbumin: Molecular Insights into the Complexation Process and Effects of Metal Ions and pH in the Binding and Antifibrillation Studies. Mol Pharm 2024; 21:4708-4725. [PMID: 39115967 DOI: 10.1021/acs.molpharmaceut.4c00675] [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] [Indexed: 08/10/2024]
Abstract
This study investigates the interaction between daphnetin and ovalbumin (OVA) as well as its potential to inhibit OVA fibrillation using both spectroscopic and computational analysis. A moderate binding affinity of 1 × 104 M-1 was observed between OVA and daphnetin, with a static quenched mechanism identified during the fluorescence quenching processes. Metal ions' (Cu2+ and Zn2+) presence led to an increase in the binding affinities of daphnetin toward OVA, mirroring a similar trend observed with the pH variation. Synchronous and 3D fluorescence studies indicated an increase in the polarity of the microenvironment surrounding the Trp residues during binding. Interestingly, circular dichroism and Fourier transform infrared studies showed a significant change in the secondary structure of OVA upon binding with daphnetin. The efficacy of daphnetin in inhibiting protein fibrillation was confirmed through thioflavin T and Congo Red binding assays along with fluorescence microscopic imaging analysis. The thermodynamic assessment showed positive ΔH° [+(29.34 ± 1.526) kJ mol-1] and ΔS° [+(181.726 ± 5.465) J mol-1] values, indicating the presence of the hydrophobic forces, while negative ΔG° signifies spontaneous binding interactions. These experimental findings were further correlated with computational analysis, revealing daphnetin dynamics within the binding site of OVA.
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Affiliation(s)
- Sadia Nudrat
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong 793003, India
| | - Bilash Maity
- Department of Chemistry, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
| | - Sana Quraishi
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong 793003, India
| | - Irungbam Karankumar
- Department of Chemistry, National Institute of Technology Manipur, Imphal, Manipur 795004, India
| | - Kalpana Kumari
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Madhurima Jana
- Department of Chemistry, National Institute of Technology Rourkela, Rourkela, Odisha 769008, India
| | - Atanu Singha Roy
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong 793003, India
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Rupreo V, Tissopi R, Baruah K, Roy AS, Bhattacharyya J. Multispectroscopic and Theoretical Investigation on the Binding Interaction of a Neurodegenerative Drug, Lobeline with Human Serum Albumin: Perturbation in Protein Conformation and Hydrophobic-Hydrophilic Surface. Mol Pharm 2024; 21:4169-4182. [PMID: 39037173 DOI: 10.1021/acs.molpharmaceut.4c00651] [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] [Indexed: 07/23/2024]
Abstract
Lobeline (LOB), a naturally occurring alkaloid, has a broad spectrum of pharmacological activities and therapeutic potential, including applications in central nervous system disorders, drug misuse, multidrug resistance, smoking cessation, depression, and epilepsy. LOB represents a promising compound for developing treatments in various medical fields. However, despite extensive pharmacological profiling, the biophysical interaction between the LOB and proteins remains largely unexplored. In the current article, a range of complementary photophysical and cheminformatics methodologies were applied to study the interaction mechanism between LOB and the carrier protein HSA. Steady-state fluorescence and fluorescence lifetime experiments confirmed the static-quenching mechanisms in the HSA-LOB system. "K" (binding constant) of the HSA-LOB system was determined to be 105 M-1, with a single preferable binding site in HSA. The forces governing the HSA-LOB stable complex were analyzed by thermodynamic parameters and electrostatic contribution. The research also investigated how various metal ions affect complex binding. Site-specific binding studies depict Site I as probable binding in HSA by LOB. We conducted synchronous fluorescence, 3D fluorescence, and circular dichroism studies to explore the structural alteration occurring in the microenvironment of amino acids. To understand the robustness of the HSA-LOB complex, we used theoretical approaches, including molecular docking and MD simulations, and analyzed the principal component analysis and free energy landscape. These comprehensive studies of the structural features of biomolecules in ligand binding are of paramount importance for designing targeted drugs and delivery systems.
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Affiliation(s)
- Vibeizonuo Rupreo
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland 797103, India
| | - Rengka Tissopi
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland 797103, India
| | - Kakali Baruah
- Department of Chemical & Biological Sciences, National Institute of Technology Meghalaya, Shillong 793003, India
| | - Atanu Singha Roy
- Department of Chemical & Biological Sciences, National Institute of Technology Meghalaya, Shillong 793003, India
| | - Jhimli Bhattacharyya
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland 797103, India
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Luikham S, Yanthan S, Bhattacharyya J. Mechanistic investigation into the binding property of Yohimbe towards natural polymeric DNAs. Sci Rep 2023; 13:15487. [PMID: 37726357 PMCID: PMC10509242 DOI: 10.1038/s41598-023-40713-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 08/16/2023] [Indexed: 09/21/2023] Open
Abstract
DNA interactions with multivalent ligand(s) have increasingly become the subject of substantial research. For several small molecules with therapeutic potential, nucleic acids serve as their primary molecular target. Such interaction has been shown to affect transcription or replication, ultimately leading to apoptotic cell death. As a result, researchers are becoming increasingly interested in understanding how small molecules interact with DNA making it possible to develop new, DNA-specific drugs. The bioactive indole alkaloid, Yohimbe (Yohimbine; Yh) has been broadly studied in pharmacological properties while its binding mode to DNA has not been explicated so far. This study adopted molecular modelling and multi-spectroscopic methods to investigate the interaction between Yohimbine and herring testes (HT DNA) in physiological conditions. Minor hypochromic and bathochromic shifts of fluorescence intensity were observed, suggesting the binding of Yh to HT DNA. The Scatchard plot analyses using the McGhee-von Hipple method revealed non-cooperative binding and affinities in the range of 105 M-1. The thermodynamic parameters suggested exothermic binding, which was favoured by negative enthalpy and positive entropy changes from temperature-dependent fluorescence experiments. Salt-dependent fluorescence suggested that the interaction between the ligand and DNA was governed by non-polyelectrolytic forces. The results of iodide quenching, urea denaturation assay, dye displacement, and in silico molecular docking, suggested groove binding of Yh to HT DNA. Thus, the groove binding mechanism of interaction was validated by both biophysical and computational techniques. The structural elucidation and energetic profiling of Yh's interaction with naturally occurring polymeric DNA can be useful to the development of DNA-targeted therapeutics.
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Affiliation(s)
- Soching Luikham
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland, 797103, India
| | - Senchumbeni Yanthan
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland, 797103, India
| | - Jhimli Bhattacharyya
- Department of Chemistry, National Institute of Technology Nagaland, Chumukedima, Nagaland, 797103, India.
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Li D, Lv P, Han XW, Jia Z, Zheng M, Feng HT. A Highly Efficient Fluorescent Sensor Based on AIEgen for Detection of Nitrophenolic Explosives. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010181. [PMID: 36615375 PMCID: PMC9821835 DOI: 10.3390/molecules28010181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
The detection of nitrophenolic explosives is important in counterterrorism and environmental protection, but it is still a challenge to identify the nitroaromatic compounds among those with a similar structure. Herein, a simple tetraphenylethene (TPE) derivative with aggregation-induced emission (AIE) characteristics was synthesized and used as a fluorescent sensor for the detection of nitrophenolic explosives (2, 4, 6-trinitrophenol, TNP and 2, 4-dinitrophenol, DNP) in water solution and in a solid state with a high selectivity. Meanwhile, it was found that only hydroxyl containing nitrophenolic explosives caused obvious fluorescence quenching. The sensing mechanism was investigated by using fluorescence titration and 1H NMR spectra. This simple AIE-active probe can potentially be applied to the construction of portable detection devices for explosives.
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Affiliation(s)
- Dongmi Li
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471000, China
- Correspondence: (D.L.); (H.-T.F.)
| | - Panpan Lv
- AIE Research Center, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Xiao-Wen Han
- AIE Research Center, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
| | - Zhilei Jia
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471000, China
| | - Min Zheng
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471000, China
| | - Hai-Tao Feng
- AIE Research Center, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, China
- Correspondence: (D.L.); (H.-T.F.)
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Zhang Y, Tian X, Zhang Z, Tang N, Ding Y, Wang Y, Li D. Boronate affinity-based template-immobilization surface imprinted quantum dots as fluorescent nanosensors for selective and sensitive detection of myricetin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 272:121023. [PMID: 35182922 DOI: 10.1016/j.saa.2022.121023] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 02/01/2022] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
In order to prepare a kind of efficient fluorescence sensors for determination of cis-diol-containing flavonoids, novel imprinted quantum dots for myricetin (Myr) were prepared based on boronate affinity-based template-immobilization surface imprinting. The obtained boronate affinity-based surface imprinted silica (imprinted APBA-functionalized CdTe QDs) was used as recognition elements. The quantum dots were used as signal-transduction materials. Under the optimum conditions, according to fluorescence quenching of imprinted APBA-functionalized CdTe QDs by Myr, the imprinting factor (IF) for Myr was evaluated to be 7.88. The result indicated that the boronate affinity functionalized quantum dots coated with imprinted silica were successfully prepared. The prepared imprinted APBA-functionalized CdTe QDs exhibited good sensitivity and selectivity for Myr. The fluorescence intensity was inversely proportional to the concentration of Myr in the 0.30-40 μM concentration range. And its detection limit was obtained to be 0.08 μM. Using the fluorescence sensors, the detection of Myr in real samples was successfully carried out, and the concentration of Myr in green tea and apple juice samples was evaluated to be 2.26 mg/g and 0.73 mg/g, respectively. The recoveries for the spiked green tea and apple juice samples were 95.2-105.0% and 91.5-111.0%, respectively. This study also provides an efficient fluorescent detection method for cis-diol-containing flavonoids in real samples.
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Affiliation(s)
- Yansong Zhang
- School of Food and Drug, Luoyang Normal University, Luoyang, 471934, China
| | - Xiping Tian
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China
| | - Zixin Zhang
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China
| | - Na Tang
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China
| | - Yihan Ding
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China
| | - Yipei Wang
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China
| | - Daojin Li
- College of Chemistry and Chemical Engineering, and Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang 471934, P. R. China.
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Xing Y, Wang Z, Li X, Hou C, Chai J, Li X, Su J, Gao J, Xu H. A new method for predicting the acute toxicity of carbamate pesticides based on the perspective of binding information with carrier protein. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120188. [PMID: 34358782 DOI: 10.1016/j.saa.2021.120188] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/08/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Toxicity is one of the most important factors limiting the success of new drug development. In this paper, we built a fast and convenient new method (Carrier protein binding information-toxicity relationship, CPBITR) for predicting drug acute toxicity based on the perspective of binding information with carrier protein. First, we studied the binding information between carbamate pesticides and human serum albumin (HSA) through various spectroscopic methods and molecular docking. Then a total of 16 models were established to clarify the relationship between binding information with HSA and drug toxicity. The results showed that the binding information was related to toxicity. Finally we obtained the effective toxicity prediction model for carbamate pesticides. And the "Platform for Predicting Drug Toxicity Based on the Information of Binding with Carrier Protein" was established with the Back-propagation neural network model. We proposed and proved that it was feasible to predict drug toxicity from this new perspective: binding with carrier protein. According to this new perspective, toxicity prediction model of other drugs can also be established. This new method has the advantages of convenience and fast, and can be used to screen out low-toxic drugs quickly in the early stage. It is helpful for drug research and development.
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Affiliation(s)
- Yue Xing
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Zishi Wang
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Xiangshuai Li
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Chenxin Hou
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Jiashuang Chai
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Xiangfen Li
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Jing Su
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China
| | - Jinsheng Gao
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China.
| | - Hongliang Xu
- Engineering Research Center of Pesticide of Heilongjiang Province, College of Advanced Agriculture and Ecological Environment, Heilongjiang University, Harbin 150080, China.
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Mehraban F, Rayati S, Mirzaaghaei V, Seyedarabi A. Highlighting the Importance of Water Alkalinity Using Phosphate Buffer Diluted With Deionized, Double Distilled and Tap Water, in Lowering Oxidation Effects on Human Hemoglobin Ozonated at High Ozone Concentrations in vitro. Front Mol Biosci 2020; 7:543960. [PMID: 33195405 PMCID: PMC7580503 DOI: 10.3389/fmolb.2020.543960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 09/14/2020] [Indexed: 12/01/2022] Open
Abstract
In autohemotherapy, it is important to find a way to lower the effects of oxidation, especially at high concentrations of ozone. One of the parameters, other than ozone concentration, which can have a significant effect on the stability and rate of decomposition of ozone at high concentrations, is the presence of ions in water. A number of spectroscopic techniques including intrinsic fluorescence, circular dichroism and UV–VIS were used as well as SDS-PAGE, Native-PAGE dynamic light scattering and water ion analysis, in order to investigate the effects of two relatively high concentrations of ozone on purified human hemoglobin (Hb) in phosphate buffer and diluted versions with deionized, double distilled and tap water in vitro. Purified human Hb and not whole blood human Hb was used in this study, since the addition of water to the whole blood would have caused the RBCs to lyse, affecting the purification of Hb for further analysis. Therefore, using purified Hb, it was possible to investigate the effects of dilution of 50 mM phosphate buffer to 10 mM phosphate buffer with different water types including non-ion containing deionized and double distilled water as well as ion-containing tap water, when ozonated at 55 and 80 μg/ml ozone. The fundamental changes in the secondary and tertiary structures of Hb were seen to be related to non-ozonated Hb samples diluted with deionized and double distilled waters, respectively. Generally, Hb oligomerization was more likely to occur at the higher concentration of ozone (80 μg/ml) and in samples where phosphate buffer was diluted with non-ion containing deionized and double distilled waters and not the ion-containing tap water. This could be explained by the presence of water alkalinity or bicarbonate ions in tap water, which can scavenge free radicals and reduce Hb oxidation/oligomerization. Therefore, it was concluded that Hb could best withstand high concentrations of ozone in the presence of the undiluted 50 mM phosphate buffer followed by phosphate buffer diluted with tap water, containing bicarbonate ions.
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Affiliation(s)
- Fouad Mehraban
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Saeed Rayati
- Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran
| | - Vahid Mirzaaghaei
- The Founder of Gardina Corporation and Manufacturer of Ozone Therapy Devices in Tehran, Tehran, Iran
| | - Arefeh Seyedarabi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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Amir M, Qureshi MA, Javed S. Biomolecular interactions and binding dynamics of tyrosine kinase inhibitor erdafitinib, with human serum albumin. J Biomol Struct Dyn 2020; 39:3934-3947. [PMID: 32448054 DOI: 10.1080/07391102.2020.1772880] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Erdafitinib is an approved tyrosine kinase inhibitor that inhibits fibroblast growth factor receptor. It has been described as one of the potent anti-tumor drugs especially for the treatment of urothelial carcinoma. In this study, we have investigated the binding dynamics of erdafitinib with human serum albumin (HSA) using multiple spectroscopic techniques. The outcome of the results suggests the occurrence of static quenching during the interaction of HSA with erdafitinib which leads to the formation of non-fluorescent HSA-erdafitinib ground state complex. Formation of HSA-erdafitinib complex was also confirmed from the findings of absorption spectral analysis. The changes in microenvironment around hydrophobic domains (especially tryptophan and tyrosine) were deciphered from fluorescence spectroscopy which was further confirmed by synchronous spectral analysis. In order to gain insight into the binding site of erdafitinib in HSA, molecular docking combined with competitive displacement assay was performed. The modified form of Stern Volmer equation was used to estimate various binding parameters including number of binding sites. The findings are indicative of a single binding site (n = 1) with binding constant in the order of 104. The negative values of thermodynamic parameters like ΔG, ΔH and ΔS were suggestive of the binding reaction being spontaneous and exothermic, while the hydrogen bonds and Van der Waals interactions being the major forces present between HSA and erdafitinib. Circular dichroism spectral analysis revealed the alterations in the conformation of HSA structure and reduction in its α-helical content.Communicated by Ramaswamy H. Sarma[Formula: see text].
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Affiliation(s)
- Mohd Amir
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Mohd Aamir Qureshi
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
| | - Saleem Javed
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India
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Li D, Zhai S, Song R, Liu Z, Wang W. Determination of cis-diol-containing flavonoids in real samples using boronate affinity quantum dots coated with imprinted silica based on controllable oriented surface imprinting approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 227:117542. [PMID: 31685427 DOI: 10.1016/j.saa.2019.117542] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/15/2019] [Accepted: 09/16/2019] [Indexed: 05/11/2023]
Abstract
Novel boronate affinity imprinted quantum dots (BA-CdTe@MIPs QDs) were used to develop a selective and sensitive fluorescent nanosensor for determination of cis-diol-containing flavonoids such as quercetin (Qu), baicalein (Bai) and luteolin (Lut) based on controllable oriented surface imprinting approach. The boronate affinity imprinted silica was used as recognition elements. Under the optimum conditions, the imprinting factor (IF) for Qu, Bai and Lut was evaluated to be 9.42, 6.58 and 10.91, respectively. The results indicated that the boronate affinity quantum dots coated with imprinted silica were successfully prepared. The obtained BA-CdTe@MIPs QDs provided high selectivity and high sensitivity for cis-diol-containing flavonoids such as quercetin and luteolin. The BA-CdTe@MIPs QDs exhibited linear decrease in fluorescence intensity with the increase of concentration of quercetin in the 0.05-25 μM concentration range. The detection limit (LOD) is evaluated to be 0.02 μM. The obtained fluorescent nanosensor could be successfully applied to efficient detection of cis-diol-containing flavonoids in onion skin and human urine samples. The recoveries for the spiked onion skin and urine samples were evaluated to be 83.50-104.00% and 86.67-105.00%, respectively. Clearly, this study provides a rapid and efficient fluorescent detection tool for cis-diol-containing flavonoids in real samples.
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Affiliation(s)
- Daojin Li
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, PR China.
| | - Simeng Zhai
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, PR China
| | - Rumeng Song
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, PR China
| | - Zheyao Liu
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, PR China
| | - Weizhou Wang
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Fuction-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, PR China
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Jia L, Zhang L, Ye YH, Li JL, Cong M, Yuan T. Effect and Mechanism of Elaeagnus angustifolia Flower and Its Major Flavonoid Tiliroside on Inhibiting Non-enzymatic Glycosylation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:13960-13968. [PMID: 31751508 DOI: 10.1021/acs.jafc.9b06712] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study aimed to evaluate the antiglycation ability of Elaeagnus angustifolia flower extract and to elucidate the mechanism with its major compound. The results indicated that E. angustifolia flower extract and its major compound tiliroside (24.2 mg/g of extract) exhibited excellent antiglycation ability with inhibition rates of 92.1 and 78.9% at 37.5 μg/mL, which are much higher than that of aminoguanidine (55.3% at 37.5 μg/mL). The stable tiliroside-ovalbumin (OVA) complexes were formed through a spontaneous exothermic progress in an equimolar manner, and hydrophobic interaction, hydrogen bond, and van der Waals forces were the major driving forces. Tiliroside could significantly ameliorate the conformation changes of OVA induced by the glycation reaction, quench its fluorescence by a static mechanism, and change the microenvironment adjacent to tryptophan and tyrosine. Molecular docking revealed that tiliroside inserted into the OVA hydrophobic pocket resulted in the formation of five hydrogen bonds. Orbitrap tandem mass spectrometry showed that tiliroside significantly suppressed the glycation of OVA, and the number of glycation sites was reduced from 9 to 5 after tiliroside was added. The above results indicated that E. angustifolia flowers and tiliroside have a good antiglycation effect and can be used as food additives to suppress the undesired glycation reaction during food processing.
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Dantas MDDA, Silva MDM, Silva ON, Franco OL, Fensterseifer ICM, Tenório HDA, Pereira HJV, Figueiredo IM, Santos JCC. Interactions of tetracyclines with milk allergenic protein (casein): a molecular and biological approach. J Biomol Struct Dyn 2019; 38:5389-5400. [PMID: 31814537 DOI: 10.1080/07391102.2019.1702587] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Tetracycline (TC), oxytetracycline (OTC), and chlortetracycline (CTC) interactions with the allergenic milk protein casein (CAS) were here evaluated simulating food conditions. The antibiotics assessed interact with CAS through static quenching and form non-fluorescent complexes. At 30 °C, the binding constant (Kb) varied from 0.05 to 1.23 × 106 M-1. Tetracycline interacts with CAS preferably through electrostatic forces, while oxytetracycline and chlortetracycline interactions occur by hydrogen bonds and van der Waals forces. The interaction process is spontaneous, and the magnitude of interaction based on Kb values, followed the order: TC < CTC < OTC. The distances between the donor (protein) and the receptors (TC, OTC, and CTC) were determined by Förster resonance energy transfer (FRET) and varied from 3.67 to 4.08 nm. Under natural feeding conditions, the citrate decreased the affinity between TC and CAS; a similar effect was observed for OTC in the presence of Ca(II), Fe(III) and lactose. Synchronized and three-dimensional (3D) fluorescence studies indicated alterations in the original protein conformation due to the interaction process, which may influence allergenic processes. In addition, complexation with CAS modulated the antimicrobial activity of CTC against S. aureus, demonstrated that the interaction process possibly alters the biological properties of antibiotics and the own protein, in the food conditions.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | | | - Osmar Nascimento Silva
- S-Inova Biotech, Post-Graduate Program in Biotechnology, Dom Bosco Catholic University, Campo Grande, Brazil
| | - Octavio Luiz Franco
- S-Inova Biotech, Post-Graduate Program in Biotechnology, Dom Bosco Catholic University, Campo Grande, Brazil
| | | | | | - Hugo Juarez V Pereira
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceió, Brazil
| | - Isis M Figueiredo
- Institute of Chemistry and Biotechnology, Federal University of Alagoas, Maceió, Brazil
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Mehraban F, Seyedarabi A, Ahmadian S, Mirzaaghaei V, Moosavi-Movahedi AA. Personalizing the safe, appropriate and effective concentration(s) of ozone for a non-diabetic individual and four type II diabetic patients in autohemotherapy through blood hemoglobin analysis. J Transl Med 2019; 17:227. [PMID: 31311548 PMCID: PMC6636166 DOI: 10.1186/s12967-019-1973-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 07/05/2019] [Indexed: 12/18/2022] Open
Abstract
Background Diabetes is a chronic disease associated with many problems and high costs. In recent decades, a lot of research has been carried out in order to improve methods of treatment of diabetic patients. One of the currently used complementary therapies for diabetes is ozone therapy or autohemotherapy. The beneficial effects of ozone has been proven in many diseases such as diabetes, but the critical issue is the determination of the safe and effective concentration of ozone reacting with blood and in particular hemoglobin. Methods A number of spectroscopic techniques including intrinsic fluorescence, circular dichroism and UV–VIS spectroscopies were used as well as SDS-PAGE, Native-PAGE and dynamic light scattering to analyze the effect of ozonation on hemoglobin of a non-diabetic individual and four diabetic patients in order to find the appropriate concentration(s) of ozone for personalized autohemotherapy. Results In this study, we determined the personalized concentration(s) for a safe and effective ozonation of a non-diabetic individual and four diabetic type II patients, based on blood hemoglobin analysis. Conclusions A number of techniques were used to determine the personalized ozone concentration(s) for a safe and effective autohemotherapy based on blood hemoglobin analysis. SDS-PAGE and dynamic light scattering were identified as the two main techniques needed for personalizing the ozone concentration(s) for each individual as otherwise hemoglobin in blood can oligomerise and cause serious damage if the inappropriate ozone concentration is used.
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Affiliation(s)
- Fouad Mehraban
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Arefeh Seyedarabi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
| | - Shahin Ahmadian
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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13
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Effect of metal ions present in milk on the structure and functional integrity of native and polyaniline chitosan nanocomposites bound β-galactosidase: A multi-spectroscopic approach. Food Chem 2019; 279:312-320. [DOI: 10.1016/j.foodchem.2018.12.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 12/03/2018] [Accepted: 12/04/2018] [Indexed: 11/18/2022]
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14
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Structural and antigenic properties of thermally treated gluten proteins. Food Chem 2018; 267:43-51. [DOI: 10.1016/j.foodchem.2017.03.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/28/2017] [Accepted: 03/04/2017] [Indexed: 01/25/2023]
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15
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Yan Y, Lu Y, Gao Y, Wang B, Zhao L, Liang H. Facile Preparation of Hydrophilic-Bifunctional-Groups Modified Magnetic Microspheres as a Novel Matrix for Detection of Phthalate Esters from Human Plasma Samples. ChemistrySelect 2018. [DOI: 10.1002/slct.201802013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yinghua Yan
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
| | - Yujie Lu
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
| | - Yiqian Gao
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
| | - Baichun Wang
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
| | - Lingling Zhao
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
| | - Hongze Liang
- School of Materials Science and Chemical Engineering; Ningbo University, Ningbo, Zhejiang; 315211, P. R. China
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16
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Mehraban F, Seyedarabi A, Seraj Z, Ahmadian S, Poursasan N, Rayati S, Moosavi-Movahedi AA. Molecular insights into the effect of ozone on human hemoglobin in autohemotherapy: Highlighting the importance of the presence of blood antioxidants during ozonation. Int J Biol Macromol 2018; 119:1276-1285. [PMID: 30096397 DOI: 10.1016/j.ijbiomac.2018.08.028] [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: 03/13/2018] [Revised: 08/05/2018] [Accepted: 08/07/2018] [Indexed: 01/31/2023]
Abstract
Ozone has been known for several decades, with its antiseptic and therapeutic effects determined by the hormesis theory. It is shown that the therapeutic efficacy of ozone therapy may be partly due to the controlled and moderate oxidative stress produced by the reaction of ozone with several biological components. In this study, the effect of ozone on healthy human hemoglobin (Hb) in the whole blood environment (in the presence of antioxidants) and in the purified form (in the absence of antioxidants) is investigated using a number of different techniques including intrinsic fluorescence, circular dichroism and UV-VIS absorption spectroscopy as well as SDS- and Native-PAGE and dynamic light scattering. The results show that the presence of antioxidants prevents damage to Hb while its absence means that as the exposure to ozone is increased, Hb is increasingly damaged. These results highlight the importance for the use of appropriate doses of ozone, for patients with different diseases and hence antioxidant levels, in autohemotherapy.
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Affiliation(s)
- Fouad Mehraban
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Arefeh Seyedarabi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
| | - Zahra Seraj
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Shahin Ahmadian
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Najmeh Poursasan
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Saeed Rayati
- Department of Chemistry, K. N. Toosi University of Technology, P.O. Box 16315-1618, Tehran 15418, Iran
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17
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Das S, Khanikar P, Hazarika Z, Rohman MA, Uzir A, Nath Jha A, Singha Roy A. Deciphering the Interaction of 5,7-Dihydroxyflavone with Hen-Egg-White Lysozyme through Multispectroscopic and Molecular Dynamics Simulation Approaches. ChemistrySelect 2018. [DOI: 10.1002/slct.201800280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sourav Das
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Portia Khanikar
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Zaved Hazarika
- Department of Molecular Biology and Biotechnology; Tezpur University; Tezpur 784028 India
| | - Mostofa Ataur Rohman
- Centre for Advanced Studies; Department of Chemistry; North-Eastern Hill University; Shillong 793022 India
| | - Antara Uzir
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
| | - Anupam Nath Jha
- Department of Molecular Biology and Biotechnology; Tezpur University; Tezpur 784028 India
| | - Atanu Singha Roy
- Department of Chemistry; National Institute of Technology; Meghalaya 793003 India
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18
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Li D, Bie Z, Wang F, Guo E. Efficient synthesis of riboflavin-imprinted magnetic nanoparticles by boronate affinity-based surface imprinting for the selective recognition of riboflavin. Analyst 2018; 143:4936-4943. [DOI: 10.1039/c8an01044g] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Riboflavin (vitamin B2), a cis-diol-containing compound, is an essential vitamin for maintaining human health mainly in energy metabolism and is a critical component of enzyme cofactors and flavoproteins.
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Affiliation(s)
- Daojin Li
- College of Chemistry and Chemical Engineering
- and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471022
- P. R. China
| | - Zijun Bie
- Department of Chemistry Bengbu Medical College
- China
| | - Fangfang Wang
- College of Chemistry and Chemical Engineering
- and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471022
- P. R. China
| | - Enhui Guo
- College of Chemistry and Chemical Engineering
- and Henan Key Laboratory of Function-Oriented Porous Materials
- Luoyang Normal University
- Luoyang 471022
- P. R. China
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Das I, Halder M. Counterpointing Scenarios on the Fate of Different Prototropic Forms of Norfloxacin Housed in the Pocket of Lysozyme: The Nonelectrostatic Interactions in the Protein Interior Are in the Controlling Role on the Prototropic Equilibria of the Guest. ACS OMEGA 2017; 2:5504-5517. [PMID: 30023748 PMCID: PMC6044686 DOI: 10.1021/acsomega.7b00703] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 08/16/2017] [Indexed: 05/21/2023]
Abstract
Herein, we report a comprehensive study on the interaction of three protomeric forms of the antibacterial drug norfloxacin (nfx) with the enzymatic protein human lysozyme (lyz). Norfloxacin, having the option for two-stage acid-base equilibria, converts from cationic (nfx+) to zwitterionic (nfx±) form, followed by an anionic (nfx-) species, with increasing pH. Among these protomeric forms, lysozyme binds nfx± most robustly, whereas nfx- has a weak association and nfx+ does not show any interaction. In lysozyme, the location of the drug was ascertained by competitive binding assay with 8-anilino-1-naphthalenesulfonate, and this was further examined with molecular docking simulation. The binding process was found to be primarily governed by hydrogen bonding and van der Waals interactions. The study has further revealed that preferential binding of nfx± by the protein over nfx- led to a switchover of nfx- to nfx±; and the resulting increased population of nfx± over the other is beneficial for the pharmacological activity of the drug in terms of its accumulation in the target bacterial cells. The present study accomplishes two important objectives. It holds significance regarding the differential interaction of multiprotomeric drugs with biomolecules, such as proteins, enzymes, lipid membranes, etc., and also on such biomolecule-assisted alteration of the acid-base equilibrium and consequent bioavailability of the drug. The findings are useful from the viewpoints of dispensation, distribution, and metabolism of any prototropic drug in living systems as they encounter several biomolecules in vivo. Another importance of this work stems from the study of comparative binding responses of lysozyme toward a drug existing in multiple forms depending on its protonation states or some other chemical processes.
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Affiliation(s)
| | - Mintu Halder
- E-mail: . Tel: +91-3222-283314. Fax: +91-3222-282252
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20
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Fang Q, Wang Y, Hu T, Liu Y. Interaction of the minocycline with extracelluar protein and intracellular protein by multi-spectral techniques and molecular docking. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Study of Binding Properties Between Two New Ibuprofen and Naproxen Based Acyl Hydrazone Derivatives and Trypsin. J Fluoresc 2016; 26:113-9. [PMID: 26482593 DOI: 10.1007/s10895-015-1690-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 10/07/2015] [Indexed: 01/27/2023]
Abstract
Two acyl hydrazone derivatives, AHI and AHN,made from ibuprofen and naproxen-derived hydrazides, were prepared and studied of binding properties with serine protease trypsin by UV-vis absorption and fluorescence quenching at pH 7.4. The results suggest that both hydrazones can interact strongly with trypsin and there are the formation of trypsin-hydrazone complexes. The Stern-Volmer constants, binding constants,binding sites and the corresponding thermodynamic parameters ΔH°, ΔS° and ΔG° were calculated at different temperatures.The effect of common metal ions on the constants was also discussed. The binding modes can be explained on the basis of hydrogen bonds and van der Waals forces. The binding distance(r) ~3 nm between the donor (trypsin) and acceptors (AHI and AHN) was obtained according to Förster's non-radiative energy transfer theory. Moreover, LOD and LOQ of hydrazones were calculated in the presence of trypsin.
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Design of bio-based supramolecular structures through self-assembly of α-lactalbumin and lysozyme. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2016.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Han R, Liu B, Li G, Zhang Q. Investigation on the interaction of cefpirome sulfate with lysozyme by fluorescence quenching spectroscopy and synchronous fluorescence spectroscopy. LUMINESCENCE 2016; 31:580-586. [PMID: 26304690 DOI: 10.1002/bio.2998] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/09/2015] [Accepted: 07/10/2015] [Indexed: 12/16/2023]
Abstract
The reaction mechanism of cefpirome sulfate with lysozyme at different temperatures (298, 310 and 318 K) was investigated using fluorescence quenching and synchronous fluorescence spectroscopy under simulated physiological conditions. The results clearly demonstrated that cefpirome sulfate caused strong quenching of the fluorescence of lysozyme by a static quenching mechanism. The binding constants obtained using the above methods were of the same order of magnitude and very similar. Static electric forces played a key role in the interaction between cefpirome sulfate and lysozyme, and the number of binding sites in the interaction was close to 1. The values of Hill's coefficients were > 1, indicating that drugs or proteins showed a very weakly positive cooperativity in the system. In addition, the conclusions obtained from the two methods using the same equation were consistent. The results indicated that synchronous fluorescence spectrometry could be used to study the binding mechanism between drug and protein, and was a useful supplement to the fluorescence quenching method. In addition, the effect of cefpirome sulfate on the secondary structure of lysozyme was analyzed using circular dichroism spectroscopy.
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Affiliation(s)
- Rong Han
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Baosheng Liu
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Gaixia Li
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Qiuju Zhang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
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Dumitrascu L, Stănciuc N, Bahrim GE, Aprodu I. Insights into the binding of ferulic acid to the thermally treated xanthine oxidase. LUMINESCENCE 2016. [DOI: 10.1002/bio.3099] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Loredana Dumitrascu
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering; Domnească Street 111 800201 Galati Romania
| | - Nicoleta Stănciuc
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering; Domnească Street 111 800201 Galati Romania
| | - Gabriela Elena Bahrim
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering; Domnească Street 111 800201 Galati Romania
| | - Iuliana Aprodu
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering; Domnească Street 111 800201 Galati Romania
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