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Burman M, Bag S, Ghosal S, Mukherjee M, Pramanik G, Bhowmik S. Revealing the Improved Binding Interaction of Plant Alkaloid Harmaline with Human Hemoglobin in Molecular Crowding Condition. ACS OMEGA 2024; 9:21668-21679. [PMID: 38764694 PMCID: PMC11097346 DOI: 10.1021/acsomega.4c02766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/21/2024]
Abstract
Harmaline and harmine are two structurally similar β-carboline alkaloids with several therapeutic activities, such as anti-inflammatory, antioxidant, neuroprotective, nephroprotective, antidiabetic, and antitumor activities. It has been previously reported that the interaction between harmaline and hemoglobin (Hb) is weak in buffer media compared to harmine. Crowding agents induce a molecular crowding environment in the ex vivo condition, which is almost similar to the intracellular environment. In this present study, we have investigated the nature of the interactions of harmaline and harmine with Hb by increasing the percentage of the crowding agent in buffer solution. The results of the UV-vis and fluorescence spectroscopy analysis have showed that with an increasing proportion of crowding agents, the interaction between harmaline and Hb is steadily improving in comparison to harmine. It has been found that the binding constant of Hb-harmaline reaches 6.82 × 105 M-1 in the 40% polyethylene glycol 200-mediated crowding condition, indicating high affinity compared to very low interaction in buffer media. Steady-state fluorescence anisotropy along with fluorescence lifetime measurements further revealed that the rotational movement of harmaline is maximally restricted by Hb in high crowding environments. Stoichiometry results represent that Hb and harmaline interacts in a 1:1 ratio in different percentages of the crowding agent. The circular dichroism spectroscopic results predict stronger interaction of harmaline with Hb (secondary structure alterations) in a higher crowding environment. From the melting study, it was found that the reactions between Hb and harmaline in crowding environments are endothermic (ΔH > 0) and disordering (ΔS > 0) in nature, indicating that hydrogen bonding and van der Waals interactions are the main interacting forces between Hb and harmaline. Harmaline molecules are more reactive in molecular crowding conditions than in normal buffer condition. This study represents that the interaction between harmaline and Hb is stronger compared to the structurally similar harmine in a molecular crowding environment, which may enlighten the drug discovery process in cell-mimicking conditions.
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Affiliation(s)
- Mangal
Deep Burman
- Department
of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | - Sagar Bag
- Department
of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | - Souvik Ghosal
- Mahatma
Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to be University), Pondy−Cuddalore Main Road, Pillaiyarkuppam, Pondicherry 607402, India
| | - Moupriya Mukherjee
- UGC-DAE
Consortium for Scientific Research, Kolkata Centre, Sector III, LB-8, Bidhan Nagar, Kolkata 700 106, India
| | - Goutam Pramanik
- UGC-DAE
Consortium for Scientific Research, Kolkata Centre, Sector III, LB-8, Bidhan Nagar, Kolkata 700 106, India
| | - Sudipta Bhowmik
- Department
of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
- Mahatma
Gandhi Medical Advanced Research Institute (MGMARI), Sri Balaji Vidyapeeth (Deemed to be University), Pondy−Cuddalore Main Road, Pillaiyarkuppam, Pondicherry 607402, India
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Sharma M, Farhat N, Khan AU, Khan FH, Mahmood R. Studies on the interaction of 2,4-dibromophenol with human hemoglobin using multi-spectroscopic, molecular docking and molecular dynamics techniques. J Biomol Struct Dyn 2023:1-11. [PMID: 37811549 DOI: 10.1080/07391102.2023.2264975] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 09/23/2023] [Indexed: 10/10/2023]
Abstract
2,4-Dibromophenol (DBP) has several industrial applications, including as a wood preservative and flame retardant. This study investigated the interaction between DBP and human hemoglobin (Hb) using spectroscopic, molecular docking and molecular dynamic techniques. The UV-visible spectra showed ground-state complex formation between DBP and Hb. Fluorescence studies revealed that DBP binding caused significant quenching of Hb fluorescence by the static quenching mechanism. The binding of DBP to Hb is a spontaneous process that involves van der Waals forces and hydrogen bonds. There is one DBP binding site on each Hb molecule that is located at the α1β2 interface of Hb. DBP binding did not alter the microenvironment of tyrosine and tryptophan residues in Hb. Circular dichroism studies revealed that DBP increased the α-helical content of Hb. The intrinsic esterase activity of Hb was inhibited by DBP in a concentration-dependent manner. Molecular docking showed that DBP binds to Hb via hydrogen bonds, hydrophobic, van der Waals and π - π interactions. Molecular dynamics simulation confirmed that the Hb-DBP complex is stable. Overall, the results of this study clearly show that DBP induces structural changes and interferes with the function of Hb. This can have important implications for human health.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Monika Sharma
- Department of Biochemistry and Interdisciplinary Biotechnology Unit, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Nabeela Farhat
- Interdisciplinary Biotechnology Unit, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Asad U Khan
- Interdisciplinary Biotechnology Unit, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Fahim Halim Khan
- Department of Biochemistry and Interdisciplinary Biotechnology Unit, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Riaz Mahmood
- Department of Biochemistry and Interdisciplinary Biotechnology Unit, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
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Gaurav M, Natesh A, Arundhati A, Mariam D. Biochemical aspects of hemoglobin-xenobiotic interactions and their implications in drug discovery. Biochimie 2021; 191:154-163. [PMID: 34474139 DOI: 10.1016/j.biochi.2021.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/27/2021] [Accepted: 08/17/2021] [Indexed: 11/18/2022]
Abstract
Hemoglobin, a homodimeric globular protein, is found predominantly in red blood cells and in a small amount in blood plasma. Along with binding to certain native molecules, it also interacts with various xenobiotics. The present review aims at studying these interactions and the resultant tangible impact on the structure and function of the protein if any. The review also encompasses various analytical and computational approaches which are routinely used to study these interactions. A detailed discussion on types of interaction exhibited by individual xenobiotics has been included herein. Additionally, the effects of xenobiotic binding on the oxygen carrying capacity of hemoglobin have been reviewed. These insights would be of great value in drug design and discovery. Envisaging probable interactions of designed ligands with hemoglobin would help improvise the process of drug development. This would also open up new avenues for studying hemoglobin-mediated drug delivery.
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Affiliation(s)
- Mehta Gaurav
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, India
| | - Ahuja Natesh
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, India
| | - Abhyankar Arundhati
- Shri Vile Parle Kelavani Mandal's Dr Bhanuben Nanavati College of Pharmacy, India
| | - Degani Mariam
- Department of Pharmaceutical Sciences and Technology, Institute of Chemical Technology, India.
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Wang Y, Han Q, Zhang H. Evaluation of the toxicity of 5-fluorouracil on three digestive enzymes from the view of side effects. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117105. [PMID: 31141767 DOI: 10.1016/j.saa.2019.05.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2018] [Revised: 04/26/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
Among the side effects of 5-fluorouracil (5-FU), the performance of the gastrointestinal reactions is faster and more obvious than others. In this work, the effects of 5-FU on the activities and conformational structures of the important digestive enzymes including α-amylase, pepsin and trypsin were studied to analyze the mechanism of the gastrointestinal adverse effects causing by 5-FU binding. The results showed that the enzymatic activity of pepsin was obviously reduced by the presence of 5-FU that bound directly to the enzyme activity cavity site. The molecular modeling and fluorescence quenching data indicated that the hydrophobic, polar and hydrogen bonding forces were involved in the ground state complex formation between proteases and 5-FU. In addition, 5-FU changed the tertiary structures of α-amylase, pepsin, and trypsin.
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Affiliation(s)
- Yanqing Wang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China; School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City, Jiangsu Province 224002, People's Republic of China.
| | - Qianqian Han
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China; Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing City, Jiangsu Province 210009, People's Republic of China
| | - Hongmei Zhang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China; School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng City, Jiangsu Province 224002, People's Republic of China.
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The Interaction and Thermodynamic Studies on the Binding of Congo Red Dye with Collagen Protein by Polarographic and Equilibrium Dialysis Techniques. Z PHYS CHEM 2018. [DOI: 10.1515/zpch-2018-1181] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The survey of the existing literature revealed that the binding of Molybdenum, Vanadium, Zinc, Cadmium, Copper, Nickel and Cobalt with the protein is well known but no binding studies of Congo red molecules with collagen are reported. With a view to extend the existed knowledge of ecological nature of dye-protein system, it was thought of interest to investigate of properties of dye-protein mixture. The binding of Congo red dye has been studied with collagen protein using polarographic and equilibrium dialysis techniques. The intrinsic association constants and the number of binding sites have been calculated from Scatchard plots. The effect of pH on these constants was studied at pH 5.57, 7.50, 9.50 by polarographic technique and it was found that these values were decreased with increasing pH. The effect of pH was found to be similar by equilibrium dialysis technique. The values of different thermodynamic parameters have been reported. The free energies of aggregation, ΔG associated with the binding interaction of the dyes and protein were calculated. The negative values of the ΔG confirm the feasibility of interaction between the dye and protein.
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Basu A, Suresh Kumar G. Binding and Inhibitory Effect of the Dyes Amaranth and Tartrazine on Amyloid Fibrillation in Lysozyme. J Phys Chem B 2017; 121:1222-1239. [DOI: 10.1021/acs.jpcb.6b10465] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anirban Basu
- Biophysical Chemistry Laboratory Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
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Kamaljeet, Bansal S, SenGupta U. A Study of the Interaction of Bovine Hemoglobin with Synthetic Dyes Using Spectroscopic Techniques and Molecular Docking. Front Chem 2017; 4:50. [PMID: 28119912 PMCID: PMC5223637 DOI: 10.3389/fchem.2016.00050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Accepted: 12/22/2016] [Indexed: 12/02/2022] Open
Abstract
Synthetic dyes are a very efficient class of dyes that are ingested or come into contact with the skin from numerous sources (cosmetics, textiles, leather, paper, and drugs). An important component of their safety profile is the interactions that they form after they enter the body. Hemoglobin is a functionally important protein that can form multiple interactions with soluble compounds present in the blood, and hence forms an important aspect of the toxicological or safety profile of the dyes. Here we study the interaction between bovine hemoglobin and organic dyes using UV-Vis absorbance and fluorescence spectroscopy. Molecular modeling was used to visualize the binding site and partners of the dye molecules, within the hemoglobin molecule. We find that all four dyes studied form sufficiently strong interactions with hemoglobin to allow for the formation of potentially toxic interactions. Molecular modeling showed that all four dyes bind within the central cavity of the hemoglobin molecule. However, binding partners could not be identified as multiple binding conformations with very similar energies were possible for each dye.
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Affiliation(s)
| | | | - Uttara SenGupta
- Department of Chemistry, Lovely Professional UniversityPhagwara, India
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8
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Basu A, Suresh Kumar G. Interaction and inhibitory influence of the azo dye carmoisine on lysozyme amyloid fibrillogenesis. MOLECULAR BIOSYSTEMS 2017. [DOI: 10.1039/c7mb00207f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The azo dye carmoisine has a significant inhibitory effect on fibrillogenesis in lysozyme.
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Affiliation(s)
- Anirban Basu
- Biophysical Chemistry Laboratory
- Organic & Medicinal Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory
- Organic & Medicinal Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
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9
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Vashishat R, Chabba S, Mahajan RK. Surface active ionic liquid induced conformational transition in aqueous medium of hemoglobin. RSC Adv 2017. [DOI: 10.1039/c7ra00075h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The molecular interactions and effect of SAILs on the conformation of human hemoglobin (Hb) has been studied using various techniques.
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Affiliation(s)
- Rajni Vashishat
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Shruti Chabba
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
| | - Rakesh Kumar Mahajan
- Department of Chemistry
- UGC-Centre for Advanced Studies
- Guru Nanak Dev University
- Amritsar-143005
- India
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10
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A biophysical investigation on the binding of proflavine with human hemoglobin: Insights from spectroscopy, thermodynamics and AFM studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 165:42-50. [DOI: 10.1016/j.jphotobiol.2016.10.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/26/2016] [Accepted: 10/11/2016] [Indexed: 12/27/2022]
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11
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Basu A, Suresh Kumar G. Multispectroscopic and calorimetric studies on the binding of the food colorant tartrazine with human hemoglobin. JOURNAL OF HAZARDOUS MATERIALS 2016; 318:468-476. [PMID: 27450339 DOI: 10.1016/j.jhazmat.2016.07.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 06/06/2023]
Abstract
Interaction of the food colorant tartrazine with human hemoglobin was studied using multispectroscopic and microcalorimetric techniques to gain insights into the binding mechanism and thereby the toxicity aspects. Hemoglobin spectrum showed hypochromic changes in the presence of tartrazine. Quenching of the fluorescence of hemoglobin occurred and the quenching mechanism was through a static mode as revealed from temperature dependent and time-resolved fluorescence studies. According to the FRET theory the distance between β-Trp37 of hemoglobin and bound tartrazine was evaluated to be 3.44nm. Synchronous fluorescence studies showed that tartrazine binding led to alteration of the microenvironment around the tryptophans more in comparison to tyrosines. 3D fluorescence and FTIR data provided evidence for conformational changes in the protein on binding. Circular dichroism studies revealed that the binding led to significant loss in the helicity of hemoglobin. The esterase activity assay further complemented the circular dichroism data. Microcalorimetric study using isothermal titration calorimetry revealed the binding to be exothermic and driven largely by positive entropic contribution. Dissection of the Gibbs energy change proposed the protein-dye complexation to be dominated by non-polyelectrolytic forces. Negative heat capacity change also corroborated the involvement of hydrophobic forces in the binding process.
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Affiliation(s)
- Anirban Basu
- Biophysical Chemistry Laboratory, Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India.
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Organic & Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India.
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12
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Vashishat R, Chabba S, Mahajan RK. Effect of surfactant head group on micellization and morphological transitions in drug-Surfactant catanionic mixture: A multi-technique approach. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.03.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Influence of the methyl position on the binding of 5-epi-taiwaniaquinone G to HSA investigated by spectrofluorimetry and molecular modeling. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1547-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Wang R, Li Z, Yang L, Ren T, Zhang L, Wang R. Studies on the interaction between neutral red and bovine hemoglobin by fluorescence spectroscopy and molecular modeling. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.07.066] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Binding of carmoisine, a food colorant, with hemoglobin: Spectroscopic and calorimetric studies. Food Res Int 2015. [DOI: 10.1016/j.foodres.2015.03.015] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Basu A, Kumar GS. Interaction of toxic azo dyes with heme protein: biophysical insights into the binding aspect of the food additive amaranth with human hemoglobin. JOURNAL OF HAZARDOUS MATERIALS 2015; 289:204-209. [PMID: 25725343 DOI: 10.1016/j.jhazmat.2015.02.044] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 02/11/2015] [Accepted: 02/14/2015] [Indexed: 06/04/2023]
Abstract
A biophysical study on the interaction of the food colorant amaranth with hemoglobin was undertaken. Spectrophotometric and spectrofluorimetric studies proposed for an intimate binding interaction between the dye and the protein. The dye quenched the fluorescence of the protein remarkably and the mechanism of quenching was found to be static in nature. Synchronous fluorescence studies suggested that the polarity around the tryptophan residues was altered in the presence of amaranth whereas the polarity around tyrosine residues remained largely unaltered. 3D fluorescence, FTIR and circular dichroism results suggested that the binding reaction caused conformational changes in hemoglobin. The negative far-UV CD bands exhibited a significantly large decrease in magnitude in the presence of amaranth. From calorimetry studies it was established that the binding was driven by a large positive entropic contribution and a small but favorable enthalpy change.
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Affiliation(s)
- Anirban Basu
- Biophysical Chemistry Laboratory, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India.
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17
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Zhang L, Liu B, Li Z, Guo Y. Comparative studies on the interaction of cefixime with bovine serum albumin by fluorescence quenching spectroscopy and synchronous fluorescence spectroscopy. LUMINESCENCE 2014; 30:686-92. [DOI: 10.1002/bio.2805] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 09/09/2014] [Accepted: 09/24/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Lihui Zhang
- Key Laboratory of Medical Chemistry and Molecular DiagnosisHebei University Baoding People's Republic of China
| | - Baosheng Liu
- Key Laboratory of Medical Chemistry and Molecular DiagnosisHebei University Baoding People's Republic of China
| | - Zhiyun Li
- Key Laboratory of Medical Chemistry and Molecular DiagnosisHebei University Baoding People's Republic of China
| | - Ying Guo
- Key Laboratory of Medical Chemistry and Molecular DiagnosisHebei University Baoding People's Republic of China
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Shanmugaraj K, Anandakumar S, Ilanchelian M. Exploring the biophysical aspects and binding mechanism of thionine with bovine hemoglobin by optical spectroscopic and molecular docking methods. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 131:43-52. [DOI: 10.1016/j.jphotobiol.2014.01.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/19/2013] [Accepted: 01/05/2014] [Indexed: 10/25/2022]
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19
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Investigations on the binding of human hemoglobin with orange I and orange II. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012; 113:14-21. [DOI: 10.1016/j.jphotobiol.2012.04.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 04/12/2012] [Accepted: 04/18/2012] [Indexed: 11/21/2022]
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Chen T, Zhu S, Shang Y, Ge C, Jiang G. Binding of dihydromyricetin to human hemoglobin: fluorescence and circular dichroism studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 93:125-130. [PMID: 22465778 DOI: 10.1016/j.saa.2012.02.109] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 02/18/2012] [Accepted: 02/27/2012] [Indexed: 05/31/2023]
Abstract
The binding reaction between dihydromyricetin (DMY) and human hemoglobin (HHb) was investigated systematically with various spectroscopic methods including fluorescence quenching technique, ultraviolet (UV)-vis absorption, synchronous fluorescence, circular dichroism (CD) spectroscopy. The experimental results showed that DMY effectively quenched the intrinsic fluorescence of HHb via static quenching. DMY binds to HHb with a stoichiometry that varies from 0.972:1 to 0.906:1 as the temperature increases from 296 to 304 K. The DMY-HHb binding constants were determined to be K(296)=2.79 × 10(4) and K(304)=1.18 × 10(4) Lmol(-1). The reaction is characterized by negative enthalpy (ΔH=-80.46 kJ mol(-1)) and negative entropy (ΔS=-186.72 kJ mol(-1)), indicating that the predominant forces in the DMY-HHb complex are van der Waals and hydrogen bonding forces. Based on the Förster's theory of non-radiative energy transfer, the binding distance between DMY and the inner tryptophan residues of HHb was determined to be 3.15 nm. Furthermore, the CD spectroscopy indicated the secondary structure of HHb is not changed in the presence of DMY.
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Affiliation(s)
- Tingting Chen
- School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, PR China
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Zhang HM, Fei ZH, Tang BP, Chen J, Tao WH, Wang YQ. The interaction of blood proteins with brucine. Mol Biol Rep 2011; 39:4937-47. [DOI: 10.1007/s11033-011-1289-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Accepted: 11/30/2011] [Indexed: 12/18/2022]
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Chen T, Zhu S, Cao H, Shang Y, Wang M, Jiang G, Shi Y, Lu T. Studies on the interaction of salvianolic acid B with human hemoglobin by multi-spectroscopic techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:1295-1301. [PMID: 21277824 DOI: 10.1016/j.saa.2010.12.081] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 12/27/2010] [Accepted: 12/28/2010] [Indexed: 05/30/2023]
Abstract
The interaction between salvianolic acid B (Sal B) and human hemoglobin (HHb) under physiological conditions was investigated by UV-vis absorption, fluorescence, synchronous fluorescence and circular dichroism spectroscopic techniques. The experimental results indicate that the quenching mechanism of fluorescence of HHb by Sal B is a static quenching procedure, the binding reaction is spontaneous, and the hydrophobic interactions play a major role in binding of Sal B to HHb. Based on Förster's theory of non-radiative energy transfer, the binding distance between Sal B and the inner tryptophan residues of HHb was determined to be 2.64 nm. The synchronous fluorescence experiment revealed that Sal B can not lead to the microenvironmental changes around the Tyr and Trp residues of HHb, and the binding site of Sal B on HHb is located at α(1)β(2) interface of HHb. Furthermore, the CD spectroscopy indicated the secondary structure of HHb is not changed in the presence of Sal B.
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Affiliation(s)
- Tingting Chen
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, PR China
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