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Sui HY, Chen D, Huang JP, Hu ZY, Hu L, Shi JH, Jiang SL. Exploring the binding characteristics between lorlatinib and human alpha-1-acid glycoprotein: Multispectral and molecular modeling techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 326:125197. [PMID: 39368180 DOI: 10.1016/j.saa.2024.125197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Revised: 08/21/2024] [Accepted: 09/22/2024] [Indexed: 10/07/2024]
Abstract
Approval in 2019 was granted for the highly selective, targeted agent lorlatinib, which primary target is ROS1 and ALK. The purpose of this work was to examine the binding mechanism between lorlatinib (LOR) and HAG employing multispectral and molecular modeling techniques. Fluorescence data demonstrated that LOR quenched HAG fluorescence as a static quenching, interecalated into the hydrophobic cavity of HAG with a moderate affinity. Thermodynamic and competitive experiments pointed out that LOR bound with HAG primarily through hydrogen bonding, hydrophobic, and van der Waals forces. Circular dichroism, three-dimensional and synchronous fluorescence spectroscopic studies noted that the secondary structure of HAG and microenvironments around tyrosine (Tyr) and tryptophan (Trp) residues were altered due to binding with LOR. The contribution of each energy involved in binding process of LOR and HAG has been analyzed by molecular simulation techniques. Besides, the environmental conditions with metal ions have also been studied. The present study is expected to provide a theoretical basis for further studying the metabolism of LOR in vivo, which may help to gain a deeper understanding of the general pharmacological activity of the drug.
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Affiliation(s)
- Huan-Yu Sui
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Dong Chen
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jia-Ping Huang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Zhe-Ying Hu
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Lu Hu
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jie-Hua Shi
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Shao-Liang Jiang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China.
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Jiang SL, Wu YT, Chen WC, Huang JP, Chen D, Li L, Han L, Shi JH. Multispectral and molecular simulation of the interaction of human α1-acid glycoprotein with palbociclib. Biochim Biophys Acta Gen Subj 2024; 1868:130712. [PMID: 39313164 DOI: 10.1016/j.bbagen.2024.130712] [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: 04/23/2024] [Revised: 07/24/2024] [Accepted: 09/11/2024] [Indexed: 09/25/2024]
Abstract
Palbociclib, a selective CDK4/6 inhibitor with potent anti-tumor effects, was investigated for its interaction with human α1-acid glycoprotein (HAG). Spectral analysis revealed that palbociclib forms a ground state complex with HAG, exhibiting binding constant (Kb) of 104 M-1 at the used temperature range. The interaction between the two was determined to be driven mainly by hydrogen bonding and hydrophobic forces. Multispectral studies indicated that the bound palbociclib altered the secondary structure of HAG and reduced polarity around Trp and Tyr amino acids. And, molecular docking and dynamics simulations verified the experimental findings. Finally, most of the metal ions present in plasma, such as K+, Cu2+, Ca2+, Mg2+, Ni2+, Fe3+, and Co2+, are detrimental to the binding of palbociclib to HAG, with the exception of Zn2+, which is favorable.
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Affiliation(s)
- Shao-Liang Jiang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Yu-Ting Wu
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Wang-Cai Chen
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jia-Ping Huang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Dong Chen
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Li Li
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Liang Han
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Jie-Hua Shi
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
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Ali MS, Teixeira LMC, Ramos MJ, Fernandes PA, Al-Lohedan HA. Interaction of major saffron constituent safranal with trypsin: An experimental and computational investigation. Int J Biol Macromol 2024; 274:133231. [PMID: 38897495 DOI: 10.1016/j.ijbiomac.2024.133231] [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: 02/28/2024] [Revised: 06/05/2024] [Accepted: 06/15/2024] [Indexed: 06/21/2024]
Abstract
Trypsin is a serine protease, an important digestive enzyme that digests the proteins in the small intestine. In the present study, we have investigated the interaction of safranal, a major saffron metabolite, with trypsin using spectroscopic and molecular docking analyses. Fluorescence emission spectra of trypsin were largely affected by the inner filter effect from safranal; that's why these were corrected using the standard procedure. The corrected fluorescence spectra have shown that the safranal quenched the intrinsic fluorescence of trypsin with a blue shift in the wavelength of emission maximum, which revealed that the microenvironment of the fluorophore became more hydrophobic. There was approximately 1: 1 fair binding between them, which increased with a rise in temperature. The interaction was favored, principally, by hydrophobic forces, and there was an efficient energy transfer from the fluorophore to the safranal. Synchronous fluorescence spectra suggested that the tryptophan residues were the major ones taking part in the fluorescence quenching of trypsin. Safranal also influenced the secondary structure of trypsin and caused partial unfolding. Molecular Docking and the Molecular Dynamics simulation of the free and complexed trypsin was also carried out. Safranal formed a stable, non-covalent complex within the S2'-S5' subsite. Moreover, two nearby tyrosine residues (Tyr39 and Tyr151) stabilized safranal through π-π interactions. Additionally, the presence of safranal led to changes in the protein flexibility and compactness, which could indicate changes in the surrounding of tryptophan residues, impacting their fluorescence. Furthermore, a loss in compactness is in line with the partial unfolding observed experimentally. Thus, both experimental and computational studies were in good agreement with each other.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia.
| | - Luís M C Teixeira
- LAQV, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências,Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Maria J Ramos
- LAQV, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências,Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Pedro A Fernandes
- LAQV, REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências,Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Hamad A Al-Lohedan
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
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Ali MS, Al-Lohedan HA. Spectroscopic and Molecular Docking Studies of the Interaction of Non-steroidal Anti-inflammatory Drugs with a Carrier Protein: an Interesting Case of Inner Filter Effect and Intensity Enhancement in Protein Fluorescence. J Fluoresc 2024; 34:1893-1901. [PMID: 37665513 DOI: 10.1007/s10895-023-03422-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 08/28/2023] [Indexed: 09/05/2023]
Abstract
Interaction of diclofenac and indomethacin with lysozyme was studied using several spectroscopic and molecular docking methods. Difference UV-visible spectra showed that the absorption profile of lysozyme changed when both diclofenac and indomethacin were mixed with the former. The sequential addition of both drugs to the lysozyme solution caused the decrease of the intrinsic fluorescence of the latter, however, when the data were corrected for inner filter effect, an enhancement in the fluorescence of lysozyme was detected. Accordingly, the fluorescence enhancement data were analyzed using Benesi-Hildebrand equation. Both, diclofenac and indomethacin showed good interaction with lysozyme, although, the association constants of indomethacin were nearly two-fold higher as compared to that of diclofenac. The binding was slightly more spontaneous in case of indomethacin and the major forces involved in the binding of both drugs with lysozyme were hydrogen bonding and hydrophobic interactions. Secondary structural analysis revealed that both drugs partially unfolded lysozyme. Results obtained through molecular docking were also in good agreement with the experimental outcomes. Both, diclofenac and indomethacin, are bounded at the same site inside lysozyme which is located in the big hydrophobic cavity of the protein.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia.
| | - Hamad A Al-Lohedan
- Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh, 11451, Saudi Arabia
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Kujur AB, Satnami ML, Chawre Y, Miri P, Sinha A, Nagwanshi R, Karbhal I, Ghosh KK, Pervez S, Deb MK. Inner-filter effect of nitrogen-doped carbon quantum dots-MnO 2 nanotubes for smartphone-integrated dual-mode sensing of glutathione and captopril. RSC Adv 2024; 14:20093-20104. [PMID: 38915329 PMCID: PMC11194709 DOI: 10.1039/d4ra03287j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Accepted: 06/15/2024] [Indexed: 06/26/2024] Open
Abstract
Nitrogen-doped carbon quantum dots (N-CQDs) exhibit unique fluorescence properties and are considered one of the best candidates for the development of fluorescence-based sensors for the detection of many analytes. In this work, a smartphone-assisted fluorescent sensor has been developed using N-CQDs and MnO2 nanotubes (MnO2 NTs) for the detection of glutathione (GSH) and captopril (CAP). N-CQDs were facilely synthesized via the solvothermal method, where o-phenylenediamine (o-PD) and urea were used as nitrogen precursors. Likewise, MnO2 NTs were synthesized using the hydrothermal method. Relying on the excellent fluorescence quenching ability of MnO2 NTs, a nanocomposite of N-CQDs and MnO2 NTs is prepared, wherein the fluorescence intensity of N-CQDs was effectively quenched in the presence of MnO2 NTs via the inner-filter effect (IFE). The addition of thiolated compounds (GSH and CAP) helped in the recovery of the fluorescence of N-CQDs by triggering the redox reaction and decomposing the MnO2 NTs. An investigation of fluorescence along with smartphone-based studies by evaluating the gray measurement using Image J software showed a great response towards GSH and CAP providing LODs of 4.70 μM and 5.22 μM (fluorometrically) and 5.76 μM and 2.81 μM (smartphone-based), respectively. The practical applicability of the sensing system has been verified using human blood plasma samples.
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Affiliation(s)
- Ankita B Kujur
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Manmohan L Satnami
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Yogyata Chawre
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Pinki Miri
- Department of Chemistry, Govt. Nagarjuna P. G. College of Science Raipur-492010 Chhattisgarh India
| | - Akash Sinha
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
- Department of Chemistry, Govt. Nagarjuna P. G. College of Science Raipur-492010 Chhattisgarh India
| | - Rekha Nagwanshi
- Department of Chemistry, Govt. Madhav Science P. G. College Ujjain-456010 Madhya Pradesh India
| | - Indrapal Karbhal
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Kallol K Ghosh
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Shamsh Pervez
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
| | - Manas Kanti Deb
- School of Studies in Chemistry, Pt. Ravishankar Shukla University Raipur-492010 Chhattisgarh India
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Yuan L, Liu T, Qi X, Zhang Y, Wang Q, Wang Q, Liu M. Multi-spectroscopic and molecular docking studies for the pH-dependent interaction of β-lactoglobulin with (-)-epicatechin gallate and/or piceatannol: Influence on antioxidant activity and stability. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 313:124090. [PMID: 38428163 DOI: 10.1016/j.saa.2024.124090] [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: 11/04/2023] [Revised: 02/23/2024] [Accepted: 02/26/2024] [Indexed: 03/03/2024]
Abstract
(-)-Epicatechin gallate (ECG) and piceatannol (PIC) are commonly polyphenols with excellent biological activities. β-Lactoglobulin (BLG) is a food-grade globule protein and its morphologies are sensitive to pH. This study used experimental and computational methods to determine the interaction of single or combined ECG and PIC with BLG at different pHs. The static quenching process was determined through fluorescence and ultraviolet-visible spectroscopy. Compared with ECG, PIC could significantly bind to BLG with higher affinity. Their binding affinity for BLG with different morphologies followed the tendency of monomer > dimer > tetramer. The negative contribution of van der Waals forces, electrostatic interactions, and hydrogen bonds to ΔHo exceeded the positive contribution of hydrophobic interactions in the spontaneous and exothermic process. The reduced binding affinity in the ternary systems demonstrated the competitive binding between ECG and PIC on BLG, and the hinder effect of ECG or PIC was enhanced with increasing pH. Molecular docking studies revealed the same binding sites of ECG and PIC on various conformations of BLG and identical driven forces as thermodynamic results. Tryptophan and tyrosine were the main participators in the BLG + ECG and BLG + PIC systems, respectively. The conformational changes in the binary and ternary systems could be ascertained through synchronous fluorescence, circular dichroism, and dynamic light scattering. Furthermore, the effects of pH and BLG encapsulation on the antioxidant capacity and stability of ECG or PIC were also implemented. ECG or PIC was the most stable in the (BLG + PIC) + ECG system at pH 6.0. This study could clarify the interaction mechanism between ECG/PIC and BLG and elucidate the pH effect on their binding information. The results will provide basic support for their usage in food processing and applications.
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Affiliation(s)
- Lixia Yuan
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Tingting Liu
- School of Material Science and Engineering, Tiangong University, Tianjin 300387, People's Republic of China
| | - Xin Qi
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Yanqing Zhang
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Qiulu Wang
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Qingpeng Wang
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, People's Republic of China
| | - Min Liu
- Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, People's Republic of China; School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China.
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7
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Duan X, Liu W, Liang J, Jing T, Liu Y, Wang X, Liu B. Modulation of protein-ligand interactions in the presence of ZIF-8: Spectroscopy and molecular dynamics simulation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 312:124053. [PMID: 38422930 DOI: 10.1016/j.saa.2024.124053] [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: 07/23/2023] [Revised: 12/17/2023] [Accepted: 02/17/2024] [Indexed: 03/02/2024]
Abstract
In this paper, we investigated the protein-ligand interactions in the presence of ZIF-8 using multi-spectroscopic approaches and molecular dynamics simulation. Fluorescence experiments and molecular docking results showed that ZIF-8 did not change the type of quenching and interaction force between ciprofloxacin (CIP) and human serum albumin (HSA), but made the binding constant of HSA-CIP to be smaller, suggesting that ZIF-8 maybe accelerate the dissociation of CIP from HSA-CIP complex. Moreover, the effect of ZIF-8 on the physiological function of HSA was explored. Multi-spectroscopic methods revealed that ZIF-8 did not significantly alter the microenvironment of amino acid groups, but cause a slight decrease in the content of α-helical conformation, and a sparse and flexible structure of the protein backbone. These peculiarities might lead to the diminution of HSA's ability to control drugs. In short, ZIF-8 might enhance drug effect due to affecting the binding of drugs to proteins. However, the present study is only a preliminary investigation of the suitability of ZIF-8 as a drug carrier in vitro, and subsequent in vivo experimental studies will be required to further confirm the idea.
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Affiliation(s)
- Xinyue Duan
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China
| | - Wei Liu
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China
| | - Jiaqi Liang
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China
| | - Tingyu Jing
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China
| | - Yu Liu
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China
| | - Xiao Wang
- Department of Gastroenterology, Central Hospital Affiliated to Shenyang Medical College, Shenyang 110075, China.
| | - Bin Liu
- School of Pharmaceutical Sciences, Liaoning University, Shenyang 110036, China.
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Gokara M, Yusuf Zamal M, Lavudiya VS, Subramanyam R. Deciphering the binding mechanism of gingerol molecules with plasma proteins: implications for drug delivery and therapeutic potential. J Biomol Struct Dyn 2024:1-18. [PMID: 38305837 DOI: 10.1080/07391102.2024.2310795] [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: 07/30/2023] [Accepted: 01/22/2024] [Indexed: 02/03/2024]
Abstract
Ginger is a highly valued herb, renowned globally for its rich content of phenolic compounds. It has been traditionally used to treat various health conditions such as cardiovascular diseases, digestive issues, migraines, Alzheimer's disease, tumor reduction and chronic inflammation. Despite its potential medicinal applications, the therapeutic effectiveness of ginger is hindered by its limited availability and low plasma concentration levels. In this study, we explored the interaction of ginger's primary phenolic compounds, specifically 6-gingerol (6 G), 8-gingerol (8 G) and 10-gingerol (10 G), with plasma proteins which are human serum albumin (HSA) and α-1-acid glycoprotein (AGP). These two plasma proteins significantly influence drug distribution and disposition as they are key binding sites for most drugs. Fluorescence emission spectra indicated strong binding of 6, 8 and 10 G with HSA, with binding constants of 2.03 ± 0.01 × 104 M-1, 4.20 ± 0.01 × 104 M-1 and 6.03 ± 0.01 × 106 M-1, respectively. However, the binding of gingerols with AGP was found to be negligible. Molecular displacement by site-specific probes and molecular docking analyses revealed that gingerols bind at the IIA domain, with stability provided by hydrogen bonds, van der Waals forces, conventional hydrogen bonds, carbon-hydrogen bonds, alkyl and Pi-alkyl interactions. Further, the partial unfolding of the protein was observed upon binding the gingerol compound with HSA. In addition, molecular dynamic simulations demonstrated that gingerols remained stable in the subdomain IIA over 100 ns. This stability, coupled with Molecular Mechanics Generalized Born Surface Area indicating free energies of -43.765, -57.504 and -66.69 kcal/mol for 6, 8 and 10 G, respectively, reinforces the robust binding potential of these compounds. Circular dichroism studies suggested that the interaction of gingerols leads to the minimal transformation of HSA secondary structure, with the pattern being 10 G > 8 G > 6 G, a finding further substantiated by root mean square deviation and root mean square fluctuation fluctuations. These results propose that HSA has a stronger affinity to gingerols than AGP, which could have significant implications on the therapeutic circulating levels of gingerols.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mahesh Gokara
- Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Mohammad Yusuf Zamal
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Vijay Srinivas Lavudiya
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Rajagopal Subramanyam
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
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Ali MS, Waseem M, Subbarao N, Alahamed AN, Al-Lohedan HA. Probing the interaction of cephalosporin antibiotic "cefoperazone" with lysozyme using spectroscopic and in silico methods: Effect of paracetamol on binding. Int J Biol Macromol 2023; 252:126568. [PMID: 37640184 DOI: 10.1016/j.ijbiomac.2023.126568] [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: 04/15/2023] [Revised: 08/16/2023] [Accepted: 08/25/2023] [Indexed: 08/31/2023]
Abstract
The interaction of lysozyme with cefoperazone was studied by means of spectroscopic and computational approaches. The change in the UV-visible spectrum of lysozyme in presence of cefoperazone was an indication of the complex formation between them. Fluorescence spectroscopy suggested that there was a fair interaction between the protein and drug which was taken place via dynamic quenching mechanism and the binding ratio was approximately 1:1. The binding was energetically feasible and principally supported by the hydrophobic forces. CD spectroscopic studies have shown that cefoperazone induced the secondary structure of lysozyme by increasing the α-helical contents of the latter. In silico studies revealed that the large nonpolar cavity was the preferred binding site of cefoperazone within lysozyme and the interaction was taken place mainly through hydrophobic forces with small involvement of hydrogen bonding and electrostatic interactions which is in good agreement with the experimental analyses. Effect of paracetamol was also seen on the binding and it was found that paracetamol had a negative influence on the binding between cefoperazone and lysozyme.
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Affiliation(s)
- Mohd Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia.
| | - Mohd Waseem
- School of Computational and Integrative Science, Jawaharlal Nehru University, New Delhi, India
| | - Naidu Subbarao
- School of Computational and Integrative Science, Jawaharlal Nehru University, New Delhi, India
| | - Abdullah Nasser Alahamed
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
| | - Hamad A Al-Lohedan
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
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Peng M, Wang Y, Wu C, Cai X, Wu Y, Du E, Zheng L, Fu J. Investigating sulfonamides - Human serum albumin interactions: A comprehensive approach using multi-spectroscopy, DFT calculations, and molecular docking. Biochem Biophys Res Commun 2023; 683:149108. [PMID: 37862782 DOI: 10.1016/j.bbrc.2023.10.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 10/22/2023]
Abstract
The environmental and health risks associated with sulfonamide antibiotics (SAs) are receiving increasing attention. Through multi-spectroscopy, density functional theory (DFT), and molecular docking, this study investigated the interaction features and mechanisms between six representative SAs and human serum albumin (HSA). Multi-spectroscopy analysis showed that the six SAs had significant binding capabilities with HSA. The order of binding constants at 298 K was as follows: sulfadoxine (SDX): 7.18 × 105 L mol-1 > sulfamethizole (SMT): 6.28 × 105 L mol-1 > sulfamerazine (SMR): 2.70 × 104 L mol-1 > sulfamonomethoxine (SMM): 2.54 × 104 L mol-1 > sulfamethazine (SMZ): 3.06 × 104 L mol-1 > sulfadimethoxine (SDM): 2.50 × 104 L mol-1. During the molecular docking process of the six SAs with HSA, the binding affinity range is from -7.4 kcal mol-1 to -8.6 kcal mol-1. Notably, the docking result of HSA-SDX reached the maximum of -8.6 kcal mol-1, indicating that SDX may possess the highest binding capacity to HSA. HSA-SDX binding, identified as a static quenching and exothermic process, is primarily driven by hydrogen bonds (H bonds) or van der Waals (vdW) interactions. The quenching processes of SMR/SMZ/SMM/SDX/SMT to HSA are a combination of dynamic and static quenching, indicating an endothermic reaction. Hydrophobic interactions are primarily accountable for SMR/SMZ/SMM/SDX/SMT and HSA binding. Competition binding results revealed that the primary HSA-SAs binding sites are in the subdomain IB of the HAS structure, consistent with the results of molecule docking. The correlation analysis based on DFT calculations revealed an inherent relationship between the structural chemical features of SAs and the binding performance of HSA-SAs. The dual descriptor (DD) and the electrophilic Fukui function were found to have a significant relationship (0.71 and -0.71, respectively) with the binding constants of HSA-SAs, predicting the binding performance of SAs and HSA. These insights have substantial scientific value for evaluating the environmental risks of SAs as well as understanding their impact on biological life activities.
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Affiliation(s)
- Mingguo Peng
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; School of Urban Construction, Changzhou University, Changzhou, 213164, China
| | - Yicui Wang
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China
| | - Chunge Wu
- School of Urban Construction, Changzhou University, Changzhou, 213164, China
| | - Xuewen Cai
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China
| | - Yao Wu
- School of Environmental Science and Engineering, Changzhou University, Changzhou, 213164, China
| | - Erdeng Du
- School of Urban Construction, Changzhou University, Changzhou, 213164, China.
| | - Lu Zheng
- School of Urban Construction, Changzhou University, Changzhou, 213164, China
| | - Jiajun Fu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
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Sajid Ali M, Singh E, Muthukumaran J, Al-Lohedan HA. Non-Steroidal Anti-Inflammatory Drug Effect on the Binding of Plasma Protein with Antibiotic Drug Ceftazidime: Spectroscopic and In Silico Investigation. Int J Mol Sci 2023; 24:14811. [PMID: 37834259 PMCID: PMC10573175 DOI: 10.3390/ijms241914811] [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: 08/31/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
The coexistence of ceftazidime, which is a popular third-generation of cephalosporin antibiotic, with ubiquitous paracetamol or acetaminophen, is very likely because the latter is given to the patients to reduce fever due to bacterial infection along with an antibiotic such as the former. Therefore, in this study, we investigated the detailed binding of ceftazidime with plasma protein, human serum albumin (HSA), in the absence and presence of paracetamol using spectroscopic techniques such as fluorescence, UV-visible, and circular dichroism, along with in silico methods such as molecular docking, molecular dynamics simulations, and MM/PBSA-based binding free energy analysis. The basic idea of the interaction was attained by using UV-visible spectroscopy. Further, fluorescence spectroscopy revealed that there was a fair interaction between ceftazidime and HSA, and the mechanism of the quenching was a dynamic one, i.e., the quenching constant increased with increasing temperature. The interaction was, primarily, reinforced by hydrophobic forces, which resulted in the partial unfolding of the protein. Low concentrations of paracetamol were ineffective in affecting the binding of ceftazidime with has; although, a decrease in the quenching and binding constants was observed in the presence of high concentrations of the former. Competitive binding site experiments using warfarin and ibuprofen as site markers revealed that ceftazidime neither binds at drug site 1 or at drug site 2, articulating another binding site, which was confirmed by molecular docking simulations.
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Affiliation(s)
- Mohd Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
| | - Ekampreet Singh
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (E.S.); (J.M.)
| | - Jayaraman Muthukumaran
- Department of Biotechnology, Sharda School of Engineering and Technology, Sharda University, Greater Noida 201310, India; (E.S.); (J.M.)
| | - Hamad A. Al-Lohedan
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
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12
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Jiang SL, Hu ZY, Wang WJ, Hu L, Li L, Kou SB, Shi JH. Investigation on the binding behavior of human α1-acid glycoprotein with Janus Kinase inhibitor baricitinib: Multi-spectroscopic and molecular simulation methodologies. Int J Biol Macromol 2023:125096. [PMID: 37285878 DOI: 10.1016/j.ijbiomac.2023.125096] [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: 02/04/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/09/2023]
Abstract
Baricitinib is a Janus Kinase (JAK) inhibitor that is primarily used to treat moderately to severely active rheumatoid arthritis in adults and has recently been reported for the treatment of patients with severe COVID-19. This paper describes the investigation of the binding behavior of baricitinib to human α1-acid glycoprotein (HAG) employing a variety of spectroscopic techniques, molecular docking and dynamics simulations. Baricitinib can quench the fluorescence from amino acids in HAG through a mix of dynamic and static quenching, according to steady-state fluorescence and UV spectra observations, but it is mainly static quenching at low concentration. The binding constant (Kb) of baricitinib to HAG at 298 K was at the level of 104 M-1, indicating a moderate affinity of baricitinib to HAG. Hydrogen bonding and hydrophobic interactions conducted the main effect, according to thermodynamic characteristics, competition studies between ANS and sucrose, and molecular dynamics simulations. For the change in HAG conformation, the results of multiple spectra showed that baricitinib was able to alter the secondary structure of HAG as well as increase the polarity of the microenvironment around the Trp amino acid. Furthermore, the binding behavior of baricitinib to HAG was investigated by molecular docking and molecular dynamics simulations, which validated experimental results. Also explored is the influence of K+, Co2+, Ni2+, Ca2+, Fe3+, Zn2+, Mg2+ and Cu2+plasma on binding affinity.
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Affiliation(s)
- Shao-Liang Jiang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Zhe-Ying Hu
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Wan-Jun Wang
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Lu Hu
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Li Li
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Song-Bo Kou
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China
| | - Jie-Hua Shi
- College of Pharmaceutic Science, Zhejiang University of Technology, Hangzhou 310032, China.
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Ali MS, Muthukumaran J, Jain M, Tariq M, Al-Lohedan HA, Al-Sanea ASS. Detailed Experimental and In Silico Investigation of Indomethacin Binding with Human Serum Albumin Considering Primary and Secondary Binding Sites. Molecules 2023; 28:molecules28072979. [PMID: 37049745 PMCID: PMC10095894 DOI: 10.3390/molecules28072979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/19/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023] Open
Abstract
The interaction of indomethacin with human serum albumin (HSA) has been studied here considering the primary and secondary binding sites. The Stern–Volmer plots were linear in the lower concentration range of indomethacin while a downward curvature was observed in the higher concentration range, suggesting the presence of more than one binding site for indomethacin inside HSA due to which the microenvironment of the fluorophore changed slightly and some of its fraction was not accessible to the quencher. The Stern–Volmer quenching constants (KSV) for the primary and secondary sites were calculated from the two linear portions of the Stern–Volmer plots. There was around a two-fold decrease in the quenching constants for the low-affinity site as compared to the primary binding site. The interaction takes place via a static quenching mechanism and the KSV decreases at both primary and secondary sites upon increasing the temperature. The binding constants were also evaluated, which show strong binding at the primary site and fair binding at the secondary site. The binding was thermodynamically favorable with the liberation of heat and the ordering of the system. In principle, hydrogen bonding and Van der Waals forces were involved in the binding at the primary site while the low-affinity site interacted through hydrophobic forces only. The competitive binding was also evaluated using warfarin, ibuprofen, hemin, and a warfarin + hemin combination as site markers. The binding profile remained unchanged in the presence of ibuprofen, whereas it decreased in the presence of both warfarin and hemin with a straight line in the Stern–Volmer plots. The reduction in the binding was at a maximum when both warfarin and hemin were present simultaneously with the downward curvature in the Stern–Volmer plots at higher concentrations of indomethacin. The secondary structure of HSA also changes slightly in the presence of higher concentrations of indomethacin. Molecular dynamics simulations were performed at the primary and secondary binding sites of HSA which are drug site 1 (located in the subdomain IIA of the protein) and the hemin binding site (located in subdomain IB), respectively. From the results obtained from molecular docking and MD simulation, the indomethacin molecule showed more binding affinity towards drug site 1 followed by the other two sites.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
- Correspondence:
| | - Jayaraman Muthukumaran
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India
| | - Monika Jain
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida 201310, India
| | - Mohammad Tariq
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Hamad A. Al-Lohedan
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdullah Saad S. Al-Sanea
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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14
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Li X, Han L, Song Z, Xu R, Wang L. Comparative study on the interaction between transferrin and flavonols: Experimental and computational modeling approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 288:122128. [PMID: 36455462 DOI: 10.1016/j.saa.2022.122128] [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: 08/12/2022] [Revised: 10/27/2022] [Accepted: 11/14/2022] [Indexed: 06/17/2023]
Abstract
Transferrin is the indispensable component in the body fluids and has been explored as a potential drug carrier for target drugs to cancer cells. Flavonols are widely distributed in plants and shown a wide range of biological activities. In the present study, the interaction between flavonols (including galangin, kaempferol, quercetin, and myricetin) and transferrin under physiological conditions was investigated by using experimental as well as computational approaches. Fluorescence data reveal that the fluorescence quenching mechanism of transferrin by flavonols is static quenching. Transferrin has moderate affinity with flavonols, and the binding constants (Ka) are 103-104 L/mol. In addition, there are two different binding sites for the interaction between kaempferol and transferrin. Thermodynamic parameter analysis shows that the interaction of flavonols and transferrin is synergistically driven by enthalpy and entropy. Hydrophobic interaction, electrostatic force and hydrogen bonds are the main force types. Synchronous fluorescence spectroscopy shows that flavonols decrease the hydrophobicity of the microenvironment around tryptophan (Trp) and have no effect on the microenvironment around tyrosine (Tyr). UV-vis and CD spectra show that the interaction between transferrin and flavonols leads to the loosening and unfolding of transferrin backbone. The increase of β-sheet is accompanied by the decrease of α-helix and β-turn. The specific binding sites of flavonols to transferrin are confirmed by molecular docking. Molecular dynamic simulation suggests that the transferrin-flavonols docked complex is stable throughout the simulation trajectory.
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Affiliation(s)
- Xiangrong Li
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China.
| | - Linyu Han
- Grade 2020, Clinical Medicine, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Zhizhi Song
- Grade 2020, Clinical Medicine, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Ruonan Xu
- Department of Medical Chemistry, Key Laboratory of Medical Molecular Probes, School of Basic Medicine, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Lixia Wang
- College of Science, Henan Agricultural University, Zhengzhou, Henan 450002, PR China
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15
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Ali MS, Rehman MT, Al-Lohedan HA, AlAjmi MF. Exploration of the binding between cuminol and bovine serum albumin through spectroscopic, molecular docking and molecular dynamics methods. J Biomol Struct Dyn 2022; 40:12404-12412. [PMID: 34488560 DOI: 10.1080/07391102.2021.1971560] [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: 12/24/2022]
Abstract
Cuminol (4-Isopropylbenzyl alcohol), found in the essential oils of several plant sources, is an important constituent of several cosmetics formulations. The interaction of cuminol with model plasma protein bovine serum albumin was studied in this paper. The experimental studies were mainly carried out using fluorescence spectrophotometry aided with UV visible and CD spectroscopies. Intrinsic fluorescence measurements showed that there was a weak binding between cuminol and BSA. The mechanism of binding involved static quenching with around 1:1 binding. The binding was chiefly supported by hydrophobic forces although a little contribution of hydrogen bonding was also found in the interaction and the values of enthalpy change were negative with positive entropy change. The secondary structure of BSA didn't change significantly in presence of low concentrations of cuminol, however, partial unfolding of the former taken place when the concentration of the latter increased. Molecular docking analyses showed cuminol binds at the intersection of subdomains IIA and IIIA, i.e. its binding site is in between Sudlow sites I and II. Molecular dynamics simulations results have shown that BSA forms a stable complex with cuminol and the structure of the former didn't change much in presence of later. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohd Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Hamad A Al-Lohedan
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed Fahad AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
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16
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Zou L, Li H, Ding X, Liu Z, He D, Kowah JAH, Wang L, Yuan M, Liu X. A Review of The Application of Spectroscopy to Flavonoids from Medicine and Food Homology Materials. Molecules 2022; 27:7766. [PMID: 36431869 PMCID: PMC9696260 DOI: 10.3390/molecules27227766] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 11/16/2022] Open
Abstract
Medicinal and food homology materials are a group of drugs in herbal medicine that have nutritional value and can be used as functional food, with great potential for development and application. Flavonoids are one of the major groups of components in pharmaceutical and food materials that have been found to possess a variety of biological activities and pharmacological effects. More and more analytical techniques are being used in the study of flavonoid components of medicinal and food homology materials. Compared to traditional analytical methods, spectroscopic analysis has the advantages of being rapid, economical and free of chemical waste. It is therefore widely used for the identification and analysis of herbal components. This paper reviews the application of spectroscopic techniques in the study of flavonoid components in medicinal and food homology materials, including structure determination, content determination, quality identification, interaction studies, and the corresponding chemometrics. This review may provide some reference and assistance for future studies on the flavonoid composition of other medicinal and food homology materials.
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Affiliation(s)
- Lin Zou
- College of Medicine, Guangxi University, Nanning 530004, China
| | - Huijun Li
- College of Medicine, Guangxi University, Nanning 530004, China
| | - Xuejie Ding
- College of Medicine, Guangxi University, Nanning 530004, China
| | - Zifan Liu
- College of Medicine, Guangxi University, Nanning 530004, China
| | - Dongqiong He
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Jamal A. H. Kowah
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Lisheng Wang
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Mingqing Yuan
- College of Medicine, Guangxi University, Nanning 530004, China
| | - Xu Liu
- College of Medicine, Guangxi University, Nanning 530004, China
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17
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Li MS, Zhang J, Zhu YX, Zhang Y. Interactions between hydroxylated polycyclic aromatic hydrocarbons and serum albumins: Multispectral and molecular docking analyses. LUMINESCENCE 2022; 37:1972-1981. [PMID: 36098937 DOI: 10.1002/bio.4384] [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: 08/31/2022] [Revised: 09/09/2022] [Accepted: 09/10/2022] [Indexed: 11/05/2022]
Abstract
Hydroxylated polycyclic aromatic hydrocarbons (OH-PAHs) can bind to serum albumin and influence their distribution and elimination in organisms. Herein, multispectral analysis and molecular docking methods were used to investigate the binding mechanism of two OH-PAHs, 1-hydroxyphenanthrene (1-OHPhe) and 9-hydroxyphenanthrene (9-OHPhe), with two homologous serum albumins, human serum albumin (HSA) and bovine serum albumin (BSA). The quenching constants of HSA with 1-OHPhe and 9-OHPhe were much larger than those for BSA. Energy transfer from the tryptophan (Trp) residues in HSA to 1-OHPhe and 9-OHPhe was more probable than from Trp in BSA. The interactions of 1-OHPhe and 9-OHPhe with Trp in HSA and BSA altered the microenvironment of Trp. Molecular docking results revealed that the binding modes and binding forces of 1-OHPhe and 9-OHPhe with HSA and BSA were different. The two OH-PAHs were used as fluorescent probes to analyze the microenvironmental hydrophobicities of HSA and BSA, which were distinctly different. The structural difference between HSA and BSA induced significant variations in their binding behavior with 1-OHPhe and 9-OHPhe. Moreover, HSA was more susceptible to 1-OHPhe and 9-OHPhe than BSA. This work suggests that the differences between the two serum albumins should be considered in related studies.
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Affiliation(s)
- Meng-Shuo Li
- State Key Laboratory of Marine Environmental Sciences of China, College of Environment and Ecology, Xiamen University, Xiamen, China
| | - Jing Zhang
- Key Laboratory of Estuarine Ecological Security and Environmental Health (Fujian Province University), Tan Kah Kee College, Xiamen University, Zhangzhou, China
| | - Ya-Xian Zhu
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Yong Zhang
- State Key Laboratory of Marine Environmental Sciences of China, College of Environment and Ecology, Xiamen University, Xiamen, China
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18
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Chen Q, Li S, Xiong H, Zhao Q. Effect of Different Extraction Methods on Physicochemical Characteristics and Antioxidant Activity of C-Phycocyanin from Dry Biomass of Arthrospira platensis. Foods 2022; 11:foods11091296. [PMID: 35564018 PMCID: PMC9102789 DOI: 10.3390/foods11091296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/17/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
The effect of four different extraction methods on physicochemical characteristics and functionalities of chloro-phycocyanin (CP) was investigated. Swelling (S-CP), freezing and thawing (4FT-CP), ultrasonication with freezing and thawing (4FT+U-CP), and the high-pressure cell disruption (HPCD-CP) process affected CP differently, thus resulting in different levels of solubility, DPPH scavenging activity, ABTS scavenging activity, and reducing power. Among the four CPs, HPCD-CP had the highest CP content (15.3%), purity (1.66 ± 0.16), and ∆E value but the lowest ∆b value. The ζ potential of HPCD-CP (−38.8 mV) was the highest, but the average particle size of 4FT+U-CP (719.1 nm) was the highest. UV-Vis absorption spectra and fluorescence spectra illustrated that high-pressure cell disruption-assisted extraction had more profound impacts on the microenvironment of tetrapyrrole chromophores, the environment of aromatic amino acids, and the phycocyanobilin of CP. Furthermore, HPCD-CP and 4FT-CP showed higher solubility and antioxidant activities than S-CP, especially 4FT+U-CP. The results obtained in this study demonstrate that HPCD technology could obtain a food-grade C-phycocyanin product with higher CP concentration, purity, solubility, and antioxidant activity.
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Affiliation(s)
- Qian Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (Q.C.); (H.X.)
| | - Shuhui Li
- Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;
| | - Hua Xiong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (Q.C.); (H.X.)
| | - Qiang Zhao
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (Q.C.); (H.X.)
- Correspondence: or ; Tel./Fax: +86-791-86634810
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Hahn da Silveira C, Chaves OA, Marques AC, Rosa NMP, Costa LAS, Iglesias BA. Synthesis, Photophysics, Computational Approaches, and Biomolecule Interactive Studies of Metalloporphyrins Containing Pyrenyl Units: Influence of the Metal Center. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Ali MS, Al-Lohedan HA. Experimental and Computational Investigation on the Interaction of Anticancer Drug Gemcitabine with Human Plasma Protein: Effect of Copresence of Ibuprofen on the Binding. Molecules 2022; 27:1635. [PMID: 35268736 PMCID: PMC8912049 DOI: 10.3390/molecules27051635] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/25/2022] [Accepted: 02/26/2022] [Indexed: 12/24/2022] Open
Abstract
The interaction of common anticancer drug gemcitabine with human serum albumin (HSA) has been studied in detail. The effect of an omnipresent nonsteroidal anti-inflammatory drug ibuprofen was also seen on the binding of HSA and gemcitabine. A slight hyperchromic shift in the difference UV-visible absorption spectra of HSA on the addition of gemcitabine gave a primary idea of the possible complex formation between them. The inner filter effect, which happens due to the significant absorbance of the ligand at the excitation and/or emission wavelengths, played an important role in the observed fluorescence quenching of HSA by gemcitabine that can be understood by comparing the observed and corrected fluorescence intensities obtained at λex = 280 nm and 295 nm. Gemcitabine showed weak interaction with HSA, which took place via a dynamic quenching mechanism with 1:1 cooperative binding between them. Secondary structural analysis, based on circular dichroism (CD) spectroscopy, showed that low concentrations of gemcitabine did not affect the native structure of protein; however, higher concentrations affected it slightly with partial unfolding. For understanding the binding site of gemcitabine within HSA, both experimental (using site markers, warfarin and ibuprofen) as well as computational methods were employed, which revealed that the gemcitabine binding site is located between the interface of subdomain IIA and IIB within the close proximity of the warfarin site (drug site 1). The effect of ibuprofen on the binding was further elaborated because of the possibility of its coexistence with gemcitabine in the prescription given to the cancer patients, and it was noticed that, ibuprofen, even present in high amounts, did not affect the binding efficacy of gemcitabine with HSA. DFT analyses of various conformers of gemcitabine obtained from its docking with various structures of HSA (free and bounded with site markers), show that the stability of the gemcitabine molecule increased slightly after binding with ibuprofen-complexed HSA. Both experimental as well as computational results were in good agreement with each other.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;
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21
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Sovrlić M, Mrkalić E, Jelić R, Ćendić Serafinović M, Stojanović S, Prodanović N, Tomović J. Effect of Caffeine and Flavonoids on the Binding of Tigecycline to Human Serum Albumin: A Spectroscopic Study and Molecular Docking. Pharmaceuticals (Basel) 2022; 15:266. [PMID: 35337065 PMCID: PMC8951011 DOI: 10.3390/ph15030266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/14/2022] [Accepted: 02/18/2022] [Indexed: 11/16/2022] Open
Abstract
Human serum albumin (HSA) has a very significant role in the transport of drugs, in their pharmacokinetic and pharmacodynamic properties, as well as the unbound concentration of drugs in circulating plasma. The aim of this study was to look into the competition between tigecycline (TGC) and alkaloid (ALK) (caffeine (CAF)), and flavonoids (FLAVs) (catechin (CAT), quercetin (QUE), and diosmin (DIO)) in binding to HSA in simulated physiological conditions using multiple spectroscopic measurements and docking simulations. Fluorescence analysis was used to find the binding and quenching properties of double HSA-TGC and triple HSA-TGC-CAF/FLAV systems. The conformational change of the HSA was analyzed using synchronous fluorescence spectroscopy, Fourier transform infrared spectroscopy, and circular dichroism. Obtained results of spectroscopic analyses indicate that triple complexes of HSA-TGC-CAF/FLAVs are formed without problems and have higher binding affinities than double HSA-TGC. In addition, TGC does not change the microenvironments around the tryptophan (Trp) and tyrosine (Tyr) residues in the presence of ALK and FLAVs. Ultimately, the binding affinity, competition, and interaction nature were explored by docking modeling. Computational outcomes are in good accordance with experimentally obtained results. Accordingly, concluding remarks may be very useful for potential interactions between common food components and drugs.
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Affiliation(s)
- Miroslav Sovrlić
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia; (M.S.); (R.J.); (S.S.); (N.P.); (J.T.)
| | - Emina Mrkalić
- Department of Science, Institute for Information Technologies, University of Kragujevac, Jovana Cvijića bb, 34000 Kragujevac, Serbia
| | - Ratomir Jelić
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia; (M.S.); (R.J.); (S.S.); (N.P.); (J.T.)
| | - Marina Ćendić Serafinović
- Department of Chemistry, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia;
| | - Stefan Stojanović
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia; (M.S.); (R.J.); (S.S.); (N.P.); (J.T.)
| | - Nevena Prodanović
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia; (M.S.); (R.J.); (S.S.); (N.P.); (J.T.)
| | - Jovica Tomović
- Department of Pharmacy, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia; (M.S.); (R.J.); (S.S.); (N.P.); (J.T.)
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22
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Ma Z, Cheng J, Jiao S, Jing P. Interaction of mulberry anthocyanins with soybean protein isolate: Effect on the stability of anthocyanins and protein
in vitro
digestion characteristics. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15576] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Ma
- Shanghai Food Safety and Engineering Technology Research Center Key Laboratory of Urban Agriculture Ministry of Agriculture School of Agriculture and Biology Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China
| | - Jing Cheng
- Shanghai Food Safety and Engineering Technology Research Center Key Laboratory of Urban Agriculture Ministry of Agriculture School of Agriculture and Biology Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China
| | - Shunshan Jiao
- Shanghai Food Safety and Engineering Technology Research Center Key Laboratory of Urban Agriculture Ministry of Agriculture School of Agriculture and Biology Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China
| | - Pu Jing
- Shanghai Food Safety and Engineering Technology Research Center Key Laboratory of Urban Agriculture Ministry of Agriculture School of Agriculture and Biology Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai 200240 China
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Su HQ, Zhang RF, Guo Q, Wang J, Li QL, Du XM, Ru J, Zhang QF, Ma CL. Five organotin complexes derived from hydroxycinnamic acid ligands: Synthesis, structure, in vitro cytostatic activity and binding interaction with BSA. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Ali MS, Muthukumaran J, Jain M, Santos-Silva T, Al-Lohedan HA, Al-Shuail NS. Molecular interactions of cefoperazone with bovine serum albumin: Extensive experimental and computational investigations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116354] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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25
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Experimental and in silico investigation on the interaction of indomethacin with bovine serum albumin: Effect of sodium dodecyl sulfate surfactant monomers on the binding. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116858] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Liao X, Zhu C, Huang D, Wen X, Zhang SL, Shen Y. Profiling the interaction of a novel toxic pyruvate dehydrogenase kinase inhibitor with human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 256:119733. [PMID: 33827040 DOI: 10.1016/j.saa.2021.119733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
To discover novel pyruvate dehydrogenase kinase (PDK) inhibitors, a new compound 2,2-dichloro-1-(4-((4-isopropylphenyl)amino)-3-nitrophenyl)ethan-1-one, namely XB-1 was identified, which inhibited PDK activity with a half maximal inhibitory concentration (IC50) value of 337.0 nM, and reduced A549 cell proliferation with a half maximal effective concentration (EC50) value of 330.0 nM. However, the compound appears to exhibit a negligible selectivity between cancer cell and normal one, indicating a potential toxicity existed for the compound. Herein, the interaction of the toxic XB-1 to human serum albumin (HSA) was firstly explored by spectroscopic approaches with the aim to reduce/avoid the toxicity of PDK inhibitors in the next hit-to-lead campaign. In detail, it was found that the XB-1 could effectively bind to HSA mainly via hydrogen bond interaction in PBS buffer (pH = 7.4, 10.0 mM), resulting in the formation of HSA-XB-1 complex. The negative value of ΔG showed that the binding of XB-1 to HSA is a spontaneous process. The result from site-selective binding assay suggested that the XB-1 bound to the site I of HSA by competing with warfarin, which was perfect in agreement with the molecular docking method. The results of this paper may offer a valuable theoretical basis to study the toxicity of biofunctional molecules and may offer thoughts about how to avoid/reduce toxicity for a small molecule.
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Affiliation(s)
- Xianjiu Liao
- West Guangxi Key Laboratory for Prevention and Treatment of High-Incidence Diseases, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Chunlei Zhu
- School of Food & Biological Engineering, Hefei University of Technology, Hefei 230009, China
| | - Ding Huang
- School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China
| | - Xiaoqing Wen
- West Guangxi Key Laboratory for Prevention and Treatment of High-Incidence Diseases, Youjiang Medical University for Nationalities, Baise 533000, China
| | - Shao-Lin Zhang
- School of Pharmaceutical Sciences, Chongqing University, Chongqing 401331, China.
| | - Yizhong Shen
- School of Food & Biological Engineering, Hefei University of Technology, Hefei 230009, China.
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Ali MS, Muthukumaran J, Jain M, Al-Lohedan HA, Farah MA, Alsowilem OI. Experimental and computational investigation on the binding of anticancer drug gemcitabine with bovine serum albumin. J Biomol Struct Dyn 2021; 40:9144-9157. [PMID: 33998966 DOI: 10.1080/07391102.2021.1924270] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This study reports the experimental and computational investigation on the binding of a common anticancer drug, gemcitabine, with the model plasma protein, bovine serum albumin (BSA). Several experimental and computational methods, such as intrinsic and synchronous fluorescence, UV-visible, and circular dichroism spectroscopies, consensus molecular docking and molecular dynamics simulation have been employed to elucidate the binding mechanism. Gemcitabine altered the UV-visible spectrum of BSA, which is a clear indication of the complex formation between them. The visual inspection of observed fluorescence quenching results at λex = 280 nm and 295 nm has shown the substantial involvement of tyrosine residue, even larger than tryptophan. However, after the correction of inner filter effect of the observed data, it became clear that tyrosine has a negligible role in quenching. A 20-fold decrease in quenching constant was found in the corrected data, as compared to the observed data at λex = 280 nm. There was a 1:1 weak binding between BSA and gemcitabine accompanied by dynamic quenching. The secondary structure of BSA remained almost intact in the presence of gemcitabine. The primary binding site of gemcitabine inside BSA was the drug binding site 2 or DS II, which is located in the subdomain 3 A. MD Simulation results suggested that gemcitabine doesn't affect or deviate the structure of BSA upon interaction throughout 100 ns time period. The dominating intermolecular forces were hydrophobic forces and hydrogen bonding. A small change in the frontier molecular orbitals of gemcitabine was also observed after its binding with BSA.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohd Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Jayaraman Muthukumaran
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, India
| | - Monika Jain
- Department of Biotechnology, School of Engineering and Technology, Sharda University, Greater Noida, India
| | - Hamad A Al-Lohedan
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - M Abul Farah
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Osama Ibrahim Alsowilem
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Ali MS, Waseem M, Subbarao N, Al-Lohedan HA. Noncovalent molecular interactions between antineoplastic drug gemcitabine and a carrier protein identified through spectroscopic and in silico methods. Int J Biol Macromol 2021; 182:993-1002. [PMID: 33857514 DOI: 10.1016/j.ijbiomac.2021.04.049] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/31/2021] [Accepted: 04/07/2021] [Indexed: 12/11/2022]
Abstract
Herein we have studied the noncovalent molecular interactions between hen egg white lysozyme (HEWL) and the commonly employed antineoplastic drug gemcitabine through the cumulative implementation of spectroscopic techniques and in silico approaches. The formation of a complex between HEWL and gemcitabine was made evident by the differences between the UV-visible spectra of the protein and protein-gemcitabine complex. Fluorescence quenching of HEWL by gemcitabine was hardly detectable at room temperature, but it became prominent at higher temperatures. Very low values for the bimolecular quenching constant and the non-reciprocal dependence of quenching on temperature indicated that dynamic quenching was taking place. Analysis of experimental data indicated that the interaction was dominated by hydrophobic forces, while the results of a computational investigation suggested the concomitant contribution of hydrogen bonding. Gemcitabine binding induced modifications of the secondary structure of HEWL by slightly increasing the α-helical content of the protein. Finally, gemcitabine binding site was inferred to be located in HEWL big hydrophobic cavity.
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Affiliation(s)
- Mohd Sajid Ali
- Department of Chemistry, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia.
| | - Mohd Waseem
- School of Computational and Integrative Science, Jawaharlal Nehru University, New Delhi, India
| | - Naidu Subbarao
- School of Computational and Integrative Science, Jawaharlal Nehru University, New Delhi, India
| | - Hamad A Al-Lohedan
- Department of Chemistry, King Saud University, P.O. Box-2455, Riyadh 11451, Saudi Arabia
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29
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Kooravand M, Asadpour S, Haddadi H, Farhadian S. An insight into the interaction between malachite green oxalate with human serum albumin: Molecular dynamic simulation and spectroscopic approaches. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124878. [PMID: 33360194 DOI: 10.1016/j.jhazmat.2020.124878] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/17/2020] [Accepted: 12/12/2020] [Indexed: 06/12/2023]
Abstract
Cationic triarylmethane dyes such as malachite green are aromatic xenobiotic compounds causing environmental pollution. The affinity between hazardous materials and biomolecules makes it important to understand the properties of such compounds. Accordingly, in this study, the possible molecular interaction between this pollutant and the human serum albumin (HSA) was investigated using a combination of molecular docking, molecular dynamic simulation and multi-spectroscopic approaches. The docking results illustrated that malachite green oxalate (MGO) could bind to some of the HSA amino acids with the estimated free energy = -32.93 kJ/mol. Further, the results of the dynamic simulation revealed that MGO had a steady interaction with the protein though increasing flexibility and decreasing the HSA compactness. These results were, therefore, in agreement with those obtained by spectroscopic techniques. The MGO concentration of 0.0005 mM could quench the HSA's intrinsic fluorescence by %16.88. The protein structural changes also revealed that the binding interaction of MGO-HSA was accompanied by an increase in the α-helix and a decrease in the β-sheet of the protein. Overall, this study indicated the suitable molecular modeling interaction of MGO and HSA.
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Affiliation(s)
- Masoumeh Kooravand
- Department of Chemistry, Faculty of Sciences, Shahrekord University, P. O. Box 115, Shahrekord, Iran
| | - Saeid Asadpour
- Department of Chemistry, Faculty of Sciences, Shahrekord University, P. O. Box 115, Shahrekord, Iran.
| | - Hedayat Haddadi
- Department of Chemistry, Faculty of Sciences, Shahrekord University, P. O. Box 115, Shahrekord, Iran.
| | - Sadegh Farhadian
- Department of Biology, Faculty of Sciences, Shahrekord University, P. O. Box.115, Shahrekord, Iran
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30
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Ali MS, Waseem M, Subbarao N, Al-Lohedan HA. Dynamic interaction between lysozyme and ceftazidime: Experimental and molecular simulation approaches. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115412] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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31
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Farsad SA, Haghaei H, Shaban M, Zakariazadeh M, Soltani S. Investigations of the molecular mechanism of diltiazem binding to human serum albumin in the presence of metal ions, glucose and urea. J Biomol Struct Dyn 2021; 40:6868-6879. [PMID: 33666142 DOI: 10.1080/07391102.2021.1891137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The molecular mechanism and thermodynamic properties of the interaction between diltiazem (DTZ) and human serum albumin (HSA), has been studied in vitro using spectroscopic techniques (UV-Vis, fluorescence, FTIR), and molecular docking methods. The effect of acidic and basic pH, glucose, urea, and metal ions on the DTZ-HSA binding has been investigated as well. According to the results, there is a 1:1 interaction between DTZ and HSA, while the quenching mechanism is static up to 313 K. The apparent binding constant was 2.09 × 106 M-1 that indicates a strong binding between DTZ and HSA. DTZ binding was increased in acidic pH while its binding was slowly decreased in the presence of glucose, urea, and metal ions. Thermodynamic studies showed that DTZ binds to HSA via an exothermic and spontaneous reaction via hydrogen bonding and electrostatic interactions. The conformational alteration of HSA is obvious according to the FTIR study. The site marker competitive study confirmed the binding of DTZ to the warfarin binding site. Molecular docking studies showed that DTZ binds to subdomain IB (-9.22 kcal mol-1) and subdomain IIIA (-9.03 kcal mol-1) with a higher tendency. Also, the results showed that the oxygen and nitrogen atoms of hydroxyl and amino functional groups of DTZ facilitate hydrogen bond formation. HighlightsStrong binding of diltiazem to HSA was studied and confirmed by fluorescence quenching titrations.Diltiazem binding to HSA reduces in the presence of metal ions, glucose, urea and alkaline pH.Diltiazem binding to HSA is exothermic and spontaneous.
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Affiliation(s)
- Sara Asadi Farsad
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Haghaei
- Nutrition and Food Sciences Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mina Shaban
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mostafa Zakariazadeh
- Department of Biochemistry, Faculty of Sciences, Payame Noor University, Tehran, Iran
| | - Somaieh Soltani
- Drug Applied Research Center and Pharmacy Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
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32
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Investigation on water soluble copper(II) mono-anionic glutamate complexes with planar aromatic ligands: synthesis, crystal structures, biomacromolecular interactions and radical scavenging activities. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Vanaei S, Parizi MS, Abdolhosseini S, Katouzian I. Spectroscopic, molecular docking and molecular dynamic simulation studies on the complexes of β-lactoglobulin, safranal and oleuropein. Int J Biol Macromol 2020; 165:2326-2337. [PMID: 33132125 DOI: 10.1016/j.ijbiomac.2020.10.139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 12/12/2022]
Abstract
Herbal bioactive compounds have captured pronounced attention considering their health-promoting effects as well as their functional properties. In this study, the binding mechanism between milk protein bovine β-lactoglobulin (β-LG), oleuropein (OLE) and safranal (SAF) found in olive leaf extract and saffron, respectively via spectroscopic and in silico studies. Fluorescence quenching information exhibited that interactions with both ligands were spontaneous and hydrophobic interactions were dominant. Also, the CD spectroscopy results demonstrated the increase in β-sheet structure and decrease in the α-helix content for both ligands. Size of β-LG-OLE complex was higher than β-LG-SAF due to the conformation and larger molecular size. Molecular docking and simulation studies revealed that SAF and OLE bind in the central calyx of β-LG and the surface of β-LG next to hydrophobic residues. Lastly, OLE formed a more stabilized complex compared to SAF based on the molecular dynamic simulation results.
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Affiliation(s)
- Shohreh Vanaei
- Nano Bioelectronics Devices Lab, Cancer Electronics Research Group, School of Electrical and Computer Engineering, Faculty of Engineering, University of Tehran, Tehran, P.O. Box 14395/515, Iran
| | - Mohammad Salemizadeh Parizi
- Nano Bioelectronics Devices Lab, Cancer Electronics Research Group, School of Electrical and Computer Engineering, Faculty of Engineering, University of Tehran, Tehran, P.O. Box 14395/515, Iran
| | - Saeed Abdolhosseini
- Nano Bioelectronics Devices Lab, Cancer Electronics Research Group, School of Electrical and Computer Engineering, Faculty of Engineering, University of Tehran, Tehran, P.O. Box 14395/515, Iran
| | - Iman Katouzian
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran; Nano-encapsulation in the Food, Nutraceutical, and Pharmaceutical Industries Group (NFNPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
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34
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Ali MS, Muthukumaran J, Al-Lohedan HA. Molecular interactions of ceftazidime with bovine serum albumin: Spectroscopic, molecular docking, and DFT analyses. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113490] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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35
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İnci D, Aydın R, Vatan Ö, Zorlu Y. A potent drug candidature of Cu(II) pyrazino[2,3-f][1,10]phenanthroline complexes with bioactive ligands: synthesis, crystal structures, biomolecular interactions, radical scavenging and cytotoxicities. J Biomol Struct Dyn 2020; 39:7194-7212. [PMID: 32811370 DOI: 10.1080/07391102.2020.1808070] [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] [Indexed: 10/23/2022]
Abstract
A novel ternary copper(II) complexes, - [Cu(py-phen)(asn)(NO3)(H2O)] (1) and [Cu(py-phen)(trp)(H2O)]NO3 (2)- (py-phen: pyrazino[2,3-f][1,10]phenanthroline, asn: asparagine, trp: tryptophan), have been synthesized and characterized by CHN analysis, ESI-MS, FTIR and single-crystal X-ray diffraction techniques. Interaction of the complexes 1 and 2 with CT-DNA has been investigated by absorption spectral titration, EB and Hoechst 33258 displacement assay. The interaction between the complexes 1 and 2 and BSA was investigated by electronic absorption and fluorescence spectroscopy methods. The experimental outcomes indicate that the fluorescence quenching mechanism between the complexes 1 and 2 and BSA is a static quenching process. The Stern-Volmer constants, binding constants, binding sites and the corresponding thermodynamic parameters (ΔG, ΔH, ΔS) of BSA + complex systems were determined at different temperatures. The binding distance between the complexes 1 and 2 and BSA was calculated according to FRET. The effect of the complexes 1 and 2 on the conformation of BSA was also examined using synchronous, two dimensional (2D) and three dimensional (3D) fluorescence spectroscopy. Radical scavenging activity of the complex was determined in terms of EC50, using the DPPH and H2O2 method. The anticancer activities of the complexes 1 and 2 were investigated using an XTT assay against three cancer cell lines (MCF-7, Caco-2 and A549) and non-tumor cell line (BEAS-2B). Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Duygu İnci
- Department of Chemistry, Faculty of Arts and Sciences, Kocaeli University, Kocaeli, Turkey
| | - Rahmiye Aydın
- Department of Chemistry, Faculty of Arts and Sciences, Bursa Uludag University, Bursa, Turkey
| | - Özgür Vatan
- Department of Biology, Faculty of Arts and Sciences, Bursa Uludag University, Bursa, Turkey
| | - Yunus Zorlu
- Department of Chemistry, Faculty of Science, Gebze Technical University, Gebze, Kocaeli, Turkey
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36
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Tong X, Prasanna G, Zhang N, Jing P. Spectroscopic and molecular docking studies on the interaction of phycocyanobilin with peptide moieties of C-phycocyanin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 236:118316. [PMID: 32344374 DOI: 10.1016/j.saa.2020.118316] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/20/2020] [Accepted: 03/29/2020] [Indexed: 06/11/2023]
Abstract
The binding of C-phycocyanin (CPC), a light harvesting pigment with phycocyanobilin (PCB), a chromophore is instrumental for the coloration and bioactivity. In this study, structure-mediated color changes of CPC from Spirulina platensis during various enzymatic hydrolysis was investigated based on UV-visible, circular dichroism, infra-red, fluorescence, mass spectrometry, and molecular docking. CPC was hydrolyzed using 7.09 U/mg protein of each enzyme at their optimal hydrolytic conditions for 3 h as follows: papain (pH 6.6, 60 °C), dispase (pH 6.6, 50 °C), and trypsin (pH 7.8, 37 °C). The degree of hydrolysis was in the order of papain (28.4%) > dispase (20.8%) > trypsin (7.3%). The sequence of color degradation rate and total color difference (ΔE) are dispase (82.9% and 40.37), papain (72.4% and 24.70), and trypsin (58.7% and 25.43). The hydrolyzed peptides were of diverse sequence length ranging from 8 to 9 residues (papain), 7-12 residues (dispase), and 9-63 residues (trypsin). Molecular docking studies showed that key amino acid residues in the peptides interacting with chromophore. Amino acid residues such as Arg86, Asp87, Tyr97, Asp152, Phe164, Ala167, and Val171 are crucial in hydrogen bonding interaction. These results indicate that the color properties of CPC might associate with chromopeptide sequences and their non-covalent interactions.
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Affiliation(s)
- Xueyu Tong
- Shanghai Food Safety and Engineering Technology Research Center, Bor S. Luh Food Safety Research Center, Key Lab of Urban Agriculture (South), School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Govindarajan Prasanna
- Shanghai Food Safety and Engineering Technology Research Center, Bor S. Luh Food Safety Research Center, Key Lab of Urban Agriculture (South), School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Nan Zhang
- Shanghai Food Safety and Engineering Technology Research Center, Bor S. Luh Food Safety Research Center, Key Lab of Urban Agriculture (South), School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Pu Jing
- Shanghai Food Safety and Engineering Technology Research Center, Bor S. Luh Food Safety Research Center, Key Lab of Urban Agriculture (South), School of Agriculture & Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
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Al-Hashimi B, Rahman HS, Omer KM. Highly Luminescent and Biocompatible P and N Co-Doped Passivated Carbon Nanodots for the Sensitive and Selective Determination of Rifampicin Using the Inner Filter Effect. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2275. [PMID: 32429119 PMCID: PMC7287754 DOI: 10.3390/ma13102275] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 11/16/2022]
Abstract
The determination of rifampicin in pharmaceutical dosage forms using a rapid, sensitive, selective, biocompatible, and low-cost method is of vital importance in the pharmaceutical analysis field to ensure its concentration is within the effective range when administered. In this study, nitrogen-and-phosphorous-doped carbon nanodots (CNDs) were prepared using a single-step hydrothermal method with ciprofloxacin as the starting material. The CNDs showed a highly intense blue fluorescence emission centered at 450 nm, with a photoluminescence quantum yield of about 51%. Since the absorption of rifampicin was the same as the excitation spectrum of CNDs, inner filter effect (IFE) quenching occurred and it was used as a successful detection platform for the analysis of rifampicin in capsules. The detection platform showed a dynamic linear range from 1 to 100 μM (R2 = 0.9940) and the limit of detection was 0.06 μM (when S/N = 3). The average spike recovery percentage for rifampicin in the capsule samples was 100.53% (n = 5). Moreover, the sub-chronic cytotoxicity of CNDs was evaluated on healthy male mice (Balb/c) drenched with different amounts of CNDs (10 and 50 mg/kg). During this study period, no mortalities or toxicity signs were recorded in any of the experimental subjects. Based on the cytotoxicity experiment, the proposed nano-probe is considered safe and biocompatible.
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Affiliation(s)
- Baraa Al-Hashimi
- Department of Pharmacology, College of Medicine, University of Sulaimani, Sulaymaniyah 46002, Kurdistan, Iraq;
| | - Heshu Sulaiman Rahman
- Department of Physiology, College of Medicine, University of Sulaimani, Sulaymaniyah 46002, Kurdistan, Iraq;
| | - Khalid Mohammad Omer
- Department of Chemistry, College of Science, University of Sulaimani, Sulaymaniyah 46002, Kurdistan, Iraq
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Ali MS, Al-Lohedan HA. Spectroscopic and Molecular Docking Investigation on the Noncovalent Interaction of Lysozyme with Saffron Constituent "Safranal". ACS OMEGA 2020; 5:9131-9141. [PMID: 32363265 PMCID: PMC7191604 DOI: 10.1021/acsomega.9b04291] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Accepted: 03/26/2020] [Indexed: 05/05/2023]
Abstract
Owing to the various beneficial properties of the popular spice saffron, the interaction of safranal, a secondary metabolite of the former, with hen egg white lysozyme was investigated. The formation of a complex was evidenced by UV-visible spectroscopy. Fluorescence quenching experiments were also performed to understand the binding mechanism and to evaluate the forces involved in binding. The strong absorption of safranal in the range of excitation and emission wavelengths of lysozyme fluorescence required the correction of the inner filter effect for fluorescence spectra to obtain the apparent extent of binding. There was a considerable difference between the observed spectra and corrected spectra, and a similar observation was found in the case of synchronous fluorescence spectra. From the analysis of quenching data, it was found that the mechanism involved in quenching was static with 1:1 binding between them. The interaction was found to be driven, mainly, by hydrophobic forces and hydrogen bonding. Safranal had negligible impact on the secondary structure of lysozyme. The interaction was also studied by molecular docking, and the results were in good agreement with the results obtained experimentally. The binding site of safranal was in the big hydrophobic cavity of lysozyme. The amino acids involved in the interaction were Asp52, Ile58, Gln57, Asn59, Trp62, Trp63, Trp108, Ile98, Asp101, and Ala107.
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39
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Ziaee E, Shareghi B, Farhadian S, Momeni L, Heibati-Goojani F. The effect of putrescine on stability and structural properties of bovine serum albumin. J Biomol Struct Dyn 2020; 39:254-262. [PMID: 31997719 DOI: 10.1080/07391102.2020.1719199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Serum albumins are the abounding proteins in plasma. Their most important characteristic is that they act as carriers for a type of compound, for example, different drugs. Bovine Serum Albumin (BSA) is a single-chain polypeptide with 583 amino acids. Polyamines such as putrescine can interact with negatively charged molecules. The effect of putrescine on the structure of bovine serum albumin has been surveyed utilizing the method of UV-Vis spectroscopy, Thermal stability, fluorescence spectroscopy, and molecular docking at temperature 298 K and 308 K at pH 7.4 using Tris-HCl as a buffer. The complex formation between putrescine and bovine serum albumin was discovered as alter in the absorbance at 280 nm. The amount of absorption increases with the addition of putrescine. The adding of putrescine alters the bovine serum albumin and decrements the hydrophobicity of the micro-environment of the Trp residues in the inner hydrophobic zone. The static kind of quenching process was chiefly contained within the quenching of intrinsic emission of the protein. The fluorescence quenching details (Ksv) for complex bovine serum albumin-putrescine revealed one binding site for putrescine. The negative amount of Gibbs free energy change (ΔG°) suggested the binding operation was spontaneous.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Elham Ziaee
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran
| | - Behzad Shareghi
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran
| | - Sadegh Farhadian
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, Iran.,Central Laboratory, Shahrekord University, Shahrekord, Iran
| | - Lida Momeni
- Department of Biology, Faculty of Science, Payam Noor University, Iran
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Wang L, Wu X, Yang Y, Liu X, Zhu M, Fan S, Wang Z, Xue J, Hua R, Wang Y, Li QX. Multi-spectroscopic measurements, molecular modeling and density functional theory calculations for interactions of 2,7-dibromocarbazole and 3,6-dibromocarbazole with serum albumin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 686:1039-1048. [PMID: 31200302 DOI: 10.1016/j.scitotenv.2019.06.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 05/27/2019] [Accepted: 06/01/2019] [Indexed: 06/09/2023]
Abstract
2,7-Dibromocarbazole (2,7-DBCB) and 3,6-dibromocarbazole (3,6-DBCB) are emerging environmental pollutants, being potentially high risks to human health. In this study, interactions of the two compounds with human serum albumin (HSA) and bovine serum albumin (BSA) were investigated by molecular modeling, density functional theory calculations (DFT) and multispectral techniques. The static quenching interaction deduced in the fluorescence quenching experiment is confirmed by the time-resolved analyses. The interactions of the two compounds with HSA/BSA induce molecular microenvironment and conformation changes, as assessed by synchronous and 3D fluorescence spectra, together with a destruction of polypeptide carbonyl hydrogen bond network by circular dichroism and Fourier transform infrared analyses. The thermodynamic analysis indicated that the spontaneous interaction was hydrogen bonding and hydrophobic forces. The binding constant Ka at 298 K was 3.54 × 105 M-1 in HSA-2,7-DBCB, 6.63 × 105 M-1 in HSA-3,6-DBCB, 1.32 × 105 M-1 in BSA-2,7-DBCB and 2.17 × 105 M-1 in BSA-3,6-DBCB. These results indicates that 3,6-DBCB binds HSA/BSA more strongly than 2,7-DBCB, which was estimated with DFT calculations. Site marker competition experiments coupled with molecular modeling studies confirmed that both compounds bind HSA/BSA at site I (subdomain IIA). The results suggest that interactions between 2,7-DBCB and 3,6-DBCB with HSA and BSA may affect the normal physiological activities in human and animals.
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Affiliation(s)
- Lijun Wang
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Xiaoqin Wu
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Yanan Yang
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Xina Liu
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Meiqing Zhu
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Shisuo Fan
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Zhen Wang
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Jiaying Xue
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Rimao Hua
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China
| | - Yi Wang
- Key Laboratory of Agri-food Safety of Anhui Province, College of Resources and Environment, Anhui Agricultural University, No, 130 Changjiang West Road, Hefei 230036, China.
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Honolulu, HI 96822, USA
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Characterization of human serum albumin's interactions with safranal and crocin using multi-spectroscopic and molecular docking techniques. Biochem Biophys Rep 2019; 20:100670. [PMID: 31535038 PMCID: PMC6744526 DOI: 10.1016/j.bbrep.2019.100670] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 07/16/2019] [Accepted: 07/17/2019] [Indexed: 12/14/2022] Open
Abstract
Interaction mechanisms of human serum albumin (HSA) with safranal and crocin were studied using UV–Vis absorption, fluorescence quenching and circular dichroism (CD) spectroscopies as well as molecular docking techniques. Changes in absorbance and fluorescence of HSA upon interactions with both compounds were attributed to their binding to amino acid chromophores located in subdomains IIA and IIIA. Fluorescence secondary inner filter effect was excluded using 278 nm and 340 nm as the wavelengths of HSA's excitation and fluorescence while safranal and crocin absorbed at 320 nm and 445 nm, respectively. Stern-Volmer model revealed a static quenching mechanism involve the formation of non-fluorescent ground state complexes. Stern-Volmer, Hill, Benesi-Hilbrand and Scatchard models gave apparent binding constants ranged in 4.25 × 103 - 2.15 × 105 for safranal and 7.67 × 103 - 4.23 × 105 L mol−1 for crocin. CD measurements indicated that 13 folds of safranal and crocin unfolded the α-helix structure of HSA by 7.47–21.20%. In-silico molecular docking revealed selective exothermic binding of safranal on eight binding sites with binding energies ranged in −3.969 to −6.6.913 kcal/mol. Crocin exothermally bound to a new large pocket located on subdomain IIA (sudlow 1) with binding energy of −12.922 kcal/mol. These results confirmed the formation of HSA stable complexes with safranal and crocin and contributed to our understanding for their binding characteristics (affinities, sites, modes, forces … etc.) and structural changes upon interactions. They also proved that HSA can solubilize and transport both compounds in blood to target tissues. The results are of high importance in determining the pharmacological properties of the two phytochemical compounds and for their future developments as anticancer, antispasmodic, antidepressant or aphrodisiac therapeutic agents. Interaction mechanisms of human serum albumin with safranal and crocin were studied using multi-spectroscopic techniques. Stern-Volmer, Hill, Benesi-Hilbrand and Scatchard models gave apparent binding constants ranged in 4.25 × 103 – 4.23 × 105 L.mol-1. In-silico molecular docking revealed selective exothermic binding on multiple HSA sites with ΔE between −3.96 and −12.92 kcal/mol The results confirmed that HSA can solubilize and transport safranal and crocin to target tissues through forming stable complexes. The results are important in determining the pharmacodynamics of both compounds and in their future development as therapeutic agents.
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Morales-Toyo M, Glidewell C, Bruno-Colmenares J, Cubillán N, Sánchez-Colls R, Alvarado Y, Restrepo J. Synthesis of (E)-Ethyl-4-(2-(furan-2-ylmethylene)hydrazinyl)benzoate, crystal structure, and studies of its interactions with human serum albumin by spectroscopic fluorescence and molecular docking methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 216:375-384. [PMID: 30921660 DOI: 10.1016/j.saa.2019.03.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/11/2019] [Accepted: 03/11/2019] [Indexed: 06/09/2023]
Abstract
A novel hydrazone, (E)-Ethyl-4-(2-(furan-2-ylmethylene)hydrazinyl)benzoate (EFHB), has been synthesized and characterized by FT-IR, NMR and Mass spectroscopy, and X-ray diffraction; compound crystallized as translucent light yellow thin plates. EFHB was studied for their binding to human serum albumin (HSA) using the fluorescence quench titration method. Molecular docking was also performed to get a more detailed insight into their interaction with HSA at the binding site. Addition of this hydrazone to HSA produced significant fluorescence quenching and splitting of emission spectra of HSA through static quenching mechanism with binding constants of about 104 M-1 at 292.15, 298.15, 304.15 and 310.15 K. According to the synchronous fluorescence, tryptophan and tyrosine residues of the protein are most perturbed by the binding process. Thermodynamic parameters ΔG, ΔH, and ΔS were got and the main sort of acting force between EFHB and HSA was studied. Results of molecular docking have shown that EFHB binds to subdomain IIA of HSA mainly by hydrophobic interaction, energy binding are in good agreement with those obtained by fluorescence study (ΔGthe = -7.32 ± 0.09 kcal mol-1 and ΔGexp = -6.76 ± 0.03 kcal mol-1).
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Affiliation(s)
- Miguel Morales-Toyo
- Laboratorio de Electrónica Molecular (LEM), Departamento de Química, Facultad Experimental de Ciencias, La Universidad del Zulia, Ap. 526, Grano de Oro, Módulo No. 2, Maracaibo, Estado Zulia, Bolivarian Republic of Venezuela; Facultad de Ciencias, Universidad Adventista Dominicana (UNAD), Autopista Duarte Km 74 1/2, Villa Sonador, Provincial Monseñor Nouel 42000, Dominican Republic.
| | | | - Julia Bruno-Colmenares
- Materials Laboratory for Emerging Technologies (LaMTE), Center for Research in Materials Technology (CITeMA), Venezuelan Institute of Scientific Research (IVIC), Bolivarian Republic of Venezuela
| | - Néstor Cubillán
- Programa de Química, Universidad del Atlántico, Barranquilla, Colombia
| | - Ronald Sánchez-Colls
- Laboratory of Sustainable Synthesis of New Materials, Center for Research in Materials Technology (CITeMA), Venezuelan Institute of Scientific Research (IVIC), Bolivarian Republic of Venezuela
| | - Ysaias Alvarado
- Laboratorio de Electrónica Molecular (LEM), Departamento de Química, Facultad Experimental de Ciencias, La Universidad del Zulia, Ap. 526, Grano de Oro, Módulo No. 2, Maracaibo, Estado Zulia, Bolivarian Republic of Venezuela; Laboratory of Molecular and Biomolecular Characterization, Center for Research in Materials Technology (CITeMA), Venezuelan Institute of Scientific Research (IVIC), Bolivarian Republic of Venezuela
| | - Jelen Restrepo
- Laboratory of Sustainable Synthesis of New Materials, Center for Research in Materials Technology (CITeMA), Venezuelan Institute of Scientific Research (IVIC), Bolivarian Republic of Venezuela.
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Ma Z, Prasanna G, Jiang L, Jing P. Molecular interaction of cyanidin-3-O-glucoside with ovalbumin: insights from spectroscopic, molecular docking and in vitro digestive studies. J Biomol Struct Dyn 2019; 38:1858-1867. [DOI: 10.1080/07391102.2019.1618735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhen Ma
- Research Center for Food Safety and Nutrition, Shanghai Engineering Research Center of Food Safety, Key Lab of Urban Agriculture (South), Bor S. Luh Food Safety Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Govindarajan Prasanna
- Research Center for Food Safety and Nutrition, Shanghai Engineering Research Center of Food Safety, Key Lab of Urban Agriculture (South), Bor S. Luh Food Safety Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Linlei Jiang
- Research Center for Food Safety and Nutrition, Shanghai Engineering Research Center of Food Safety, Key Lab of Urban Agriculture (South), Bor S. Luh Food Safety Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Pu Jing
- Research Center for Food Safety and Nutrition, Shanghai Engineering Research Center of Food Safety, Key Lab of Urban Agriculture (South), Bor S. Luh Food Safety Research Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
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44
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Molina-Bolívar JA, Galisteo-González F, Ruiz CC, Medina-O'Donnell M, Martínez A, Parra A. Maslinic acid conjugate with 7-amino-4-methylcoumarin as probe to monitor the temperature dependent conformational changes of human serum albumin by FRET. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:161-169. [PMID: 30776717 DOI: 10.1016/j.saa.2019.02.014] [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: 09/14/2018] [Revised: 01/14/2019] [Accepted: 02/09/2019] [Indexed: 05/25/2023]
Abstract
Synthesis, characterization and spectroscopic investigation of maslinic acid labeled with fluorescent 7-amino-4-methylcoumarin is reported. It was found that the coumarin-maslinic derivative (MaCo) forms an excellent fluorescence resonance energy transfer (FRET) pair with the tryptophan (Trp) residue of human serum albumin (HSA). This feature allowed for monitoring HSA conformational alterations by measuring the distance between donor (Trp) and acceptor (MaCo) through Förster energy transfer mechanism. Displacement experiments confirmed that MaCo binds to subdomain IIA of HSA with independence of temperature. It was observed that, in the temperature range 35-45 °C, the fluorescence emission maximum of HSA-MaCo complex decreased, whereas in the range 45 °C-65 °C, an increment was detected. The concomitant change in the polarity of environment surrounding Trp was confirmed by red edge excitation shift experiments. Thermal denaturation of HSA was followed by time-resolved fluorescence spectroscopy. Average lifetime of Trp residue decreased with temperature due to the increment of solvent collisions and changes in the solvent exposure of Trp. To discriminate the importance of each effect, lifetime of N-Acetyl-L-tryptophanamide (NATA) at different temperatures was measured. Circular dichroism (CD) studies confirmed the loss of secondary structure of HSA with increasing temperature and showed a different trend in the conformational transformation below and above 45 °C, in agreement with steady-state and time-resolved fluorescence experiments.
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Affiliation(s)
- J A Molina-Bolívar
- Department of Applied Physics II, Engineering School, University of Málaga, 29071 Málaga, Spain.
| | | | - C Carnero Ruiz
- Department of Applied Physics II, Engineering School, University of Málaga, 29071 Málaga, Spain
| | - M Medina-O'Donnell
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
| | - A Martínez
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
| | - A Parra
- Department of Organic Chemistry, University of Granada, 18071 Granada, Spain
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Ji X, Li H, Zhang J, Saiyin H, Zheng Z. The collaborative effect of Chlorella vulgaris-Bacillus licheniformis consortia on the treatment of municipal water. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:483-493. [PMID: 30458425 DOI: 10.1016/j.jhazmat.2018.11.039] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2018] [Revised: 10/28/2018] [Accepted: 11/10/2018] [Indexed: 06/09/2023]
Abstract
In this study, the effects of nutrient and dissolved organic matter removal, stress resistance (DNA methylation), and the algae-bacteria dynamic ratio of algal-bacterial consortia in actual municipal wastewater were investigated. Results indicate that the presence of a Chlorella vulgaris-Bacillus licheniformis consortium had profound effects. The removal rates of total nitrogen, ammonium, orthophosphate phosphorus and chemical oxygen demand were 88.82%, 84.98%, 84.87% and 82.25%, respectively. Protein-like substances, which are difficult to degrade in the natural water environment, were significantly degraded in actual municipal wastewater. Furthermore, the microbial diversity was measured. The algal-bacterial consortium did not disrupt the microbial in-situ diversity of the actual municipal wastewater under suitable conditions. The global nuclear DNA methylation level peaked at 7.80%. These results help to understand the effects of algal-bacterial consortia on nutrient and pollutant removal and adaptability in actual municipal wastewater.
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Affiliation(s)
- Xiyan Ji
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China
| | - Huimin Li
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China
| | - Jibiao Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China.
| | - Hexige Saiyin
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, 200433, PR China
| | - Zheng Zheng
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, PR China.
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46
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Mu H, Chen S, Liu F, Xiao J, Huang H, Zhang Y, Sun Y, Gao X, Lei H, Yuan X. Stereoselective interactions of lactic acid enantiomers with HSA: Spectroscopy and docking application. Food Chem 2019; 270:429-435. [PMID: 30174068 DOI: 10.1016/j.foodchem.2018.07.135] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 07/02/2018] [Accepted: 07/19/2018] [Indexed: 02/08/2023]
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