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Jalan A, Moyon NS. Molecular interactions and binding dynamics of Alpelisib with serum albumins: insights from multi-spectroscopic techniques and molecular docking. J Biomol Struct Dyn 2024; 42:2127-2143. [PMID: 37098825 DOI: 10.1080/07391102.2023.2203256] [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: 11/24/2022] [Accepted: 04/10/2023] [Indexed: 04/27/2023]
Abstract
Alpelisib (ALP) is a potent anti-cancer drug showing promising activity against advanced breast cancers. Hence, profound understanding of its binding dynamics within the physiological system is vital. Herein, we have investigated interaction of ALP with human serum albumin (HSA) and bovine serum albumin (BSA) using spectroscopic techniques like absorption, fluorescence, time-resolved, synchronous and 3D-fluorescence, FRET, FT-IR, CD, and molecular docking studies. The intrinsic fluorescence of both BSA and HSA quenched significantly by ALP with an appreciable red shift in its emission maxima. Stern-Volmer analysis showed increase in Ksv with temperature indicating involvement of dynamic quenching process. This was further validated by no significant change in absorption spectrum of BSA and HSA (at 280 nm) upon ALP interaction, and by results of fluorescence time-resolved lifetime studies. ALP exhibited moderately strong binding affinity with BSA (of the order 106 M-1) and HSA (of the order 105 M-1), and the major forces accountable for stabilizing the interactions are hydrophobic forces. Competitive drug binding experiments and molecular docking suggested that ALP binds to site I in subdomain IIA of BSA and HSA. The Förster distance r was found to be less than 8 nm and 0.5 Ro < r < 1.5 Ro which suggests possible energy transfer between donors BSA/HSA and acceptor ALP. Synchronous and 3D-fluoresecnce, FT-IR and CD studies indicated that ALP induces conformational changes of BSA and HSA upon interaction.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Ankita Jalan
- Department of Chemistry, National Institute of Technology Silchar, Cachar, Assam, India
| | - N Shaemningwar Moyon
- Department of Chemistry, National Institute of Technology Silchar, Cachar, Assam, India
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2
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Deiser S, Drexler M, Moreno-Alcántar G, Irl M, Schmidt C, Günther T, Casini A. Synthesis of 177Lu-Labeled, Somatostatin-2 Receptor-Targeted Metalla-Assemblies: Challenges in the Design of Supramolecular Radiotherapeutics. Inorg Chem 2023; 62:20710-20720. [PMID: 37556427 DOI: 10.1021/acs.inorgchem.3c02090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Self-assembled supramolecular coordination complexes (SCCs) hold promise for biomedical applications in cancer therapy, although their potential in the field of nuclear medicine is still substantially unexplored. Therefore, in this study an exo-functionalized cationic [Pd2L2]4+ metallacycle (L = 3,5-bis(3-ethynylpyridine)phenyl), targeted to the somatostatin-2 receptor (sst2R) and featuring the DOTA chelator (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) in order to bind the β-- and γ-emitter lutetium-177, was synthesized by self-assembly following ligand synthesis via standard solid-phase peptide synthesis (SPPS). This metallacycle was then characterized by reverse-phase high-performance liquid chromatography (RP-HPLC), electrospray ionization mass spectrometry (ESI-MS), and 1H and 1H-DOSY NMR (DOSY = diffusion-ordered spectroscopy). A procedure for the radiolabeling of the metallacycle with 177Lu was also optimized. The resulting [nat/177Lu]Lu-DOTA-metallacycle, termed [nat/177Lu]Lu-Cy, was evaluated concerning its stability and in vitro properties. The compound was more lipophilic compared to the reference [177Lu]Lu-DOTA-TATE (logPOct/H2O = -0.85 ± 0.10 versus -3.67 ± 0.04, respectively). While [natLu]Lu-Cy revealed low stability in a DMEM/F12 GlutaMax medium, it demonstrated good stability in other aqueous media as well as in DMSO. A high sst2R binding affinity (expressed as IC50) was determined in CHOsst2 cells (Chinese hamster ovary cells that were stably transfected with human sst2R). Moreover, the metallacycle exhibited high human serum albumin binding, as assessed by high-performance affinity chromatography (HPAC), and moderate stability in human serum compared to [177Lu]Lu-DOTA-TATE (TATE = (Tyr3)-octreotate). In order to improve stability, a heteroleptic approach was used to develop a less sterically hindered cage-like SCC that is potentially endowed with host-guest chemistry capability, which has been preliminarily characterized by RP-HPLC and ESI-MS. Overall, our initial results encourage future studies on sst2R-directed SCCs and have led to new insights into the chemistry of ss2R-directed SCCs for radiopharmaceutical applications.
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Affiliation(s)
- Sandra Deiser
- Chair of Pharmaceutical Radiochemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Walther-Meißner-Str. 3, 85748 Garching b. München, Germany
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching b. München, Germany
| | - Marike Drexler
- Chair of Pharmaceutical Radiochemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Walther-Meißner-Str. 3, 85748 Garching b. München, Germany
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching b. München, Germany
| | - Guillermo Moreno-Alcántar
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching b. München, Germany
| | - Maximilian Irl
- Chair of Pharmaceutical Radiochemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Walther-Meißner-Str. 3, 85748 Garching b. München, Germany
| | - Claudia Schmidt
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching b. München, Germany
| | - Thomas Günther
- Chair of Pharmaceutical Radiochemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Walther-Meißner-Str. 3, 85748 Garching b. München, Germany
| | - Angela Casini
- Chair of Medicinal and Bioinorganic Chemistry, Department of Chemistry, School of Natural Sciences, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching b. München, Germany
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3
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Sookai S, Munro OQ. Spectroscopic and computational study of the interaction of Pt(II) pyrrole-imine chelates with human serum albumin. Dalton Trans 2023; 52:14774-14789. [PMID: 37698009 DOI: 10.1039/d3dt02039h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
Three bis(pyrrolide-imine) Pt(II) chelates were synthesised and characterized with different bridging alkyl groups, specifically 2-hydroxypropyl (1), 2,2-dimethylpropyl (2), and 1,2-(S,S)-(+)-cyclohexyl (3). Novel compounds 1 and 2 were analysed by single-crystal X-ray diffraction (space group P1̄). The asymmetric unit of 1 comprises three independent molecules linked by hydrogen bonds involving the OH groups, forming a trimeric supramolecular structure. The Pt(II) chelates were reacted with human serum albumin (HSA) to investigate how the ligand bound to the Pt(II) ion influences the compound's affinity for HSA. Fluorescence quenching data obtained for native HSA and HSA bound to site-specific probes (warfarin, subdomain IIA; ibuprofen, subdomain IIIA) indicated that the three Pt(II) chelates bind close enough (within ∼30 Å) to Trp-214 to quench its intrinsic fluorescence. The bimolecular quenching constant (kq) was 103-104 -fold higher than the maximum diffusion-controlled collision constant in water (1010 M s-1) at 310 K, while the affinity constants, Ka, ranged from ∼5 × 103 to ∼5 × 105 at 310 K, and followed the order 1 > 3 > 2. The reactions of 1 and 3 with HSA were enthalpically driven, while that for 2 was entropically driven. Macromolecular docking simulations (Glide XP) and binding site specificity assays employing site-specific probes and UV-vis CD spectroscopy indicated that 1 and 2 target Sudlow's site II in subdomain IIIA, minimally perturbing the tertiary structure of the protein. Well-resolved induced CD signals from 1 and 2 bound to HSA in subdomain IIIA were adequately simulated by hybrid QM:MM TD-DFT methods. We conclude that the structure of the bis(pyrrolide-imine) Pt(II) chelate measurably affects its uptake by HSA without detectable decomposition or demetallation. Such compounds could thus serve as metallodrug candidates capable of utilising an HSA-mediated cellular uptake pathway.
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Affiliation(s)
- Sheldon Sookai
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO WITS 2050, Johannesburg, South Africa.
| | - Orde Q Munro
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, PO WITS 2050, Johannesburg, South Africa.
- School of Chemistry University of Leeds, Woodhouse Lane, LS2 9JT, UK.
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Huang ZY, Li XY, Hu LY, Bai AM, Hu YJ. Comparative study of two antipsychotic drugs binding to human serum albumin: By multispectroscopic and molecular docking methods. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Baruah P, Paul D, Doshi J, Mitra S. Elevated Fibrinogen Level Reduces Therapeutic Efficiency of AD Drugs: Biophysical Insights into the Interaction of FDA-Approved Cholinesterase Inhibitors with Human Fibrinogen. J Phys Chem B 2021; 126:30-43. [PMID: 34964643 DOI: 10.1021/acs.jpcb.1c07495] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Despite being the second most abundant protein in blood plasma, reports on the interaction of drugs with fibrinogen (FIB) are relatively scarce. The effect of FIB on the therapeutic potency of four FDA-approved Alzheimer's disease drugs, namely, tacrine (TAC), donepezil (DON), eserine (ESE), and huperzine (HUP), was investigated through a combination of different in vitro and in silico experiments. The efficiency of the drugs in inhibiting the activity of acetylcholinesterase (AChE) was significantly reduced in the presence of FIB. This effect was even found to be more substantial than that for the most abundant plasma protein, human serum albumin (HSA). For example, the relative change in IC50 for TAC was found to be 65% in 10 μM FIB as opposed to 43% in the presence of 250 μM HSA. The relative trend of modulation in AChE activity showed consistency with the binding efficiency of the drugs and FIB. The sequestration of drugs in FIB, therefore reducing the availability of free drugs in solution, was identified to be the primary cause for the decrease in the AChE inhibition potency. This study aims to establish FIB as a vital component, while considering the therapeutic effectiveness of different newly developed AChE inhibitors.
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Affiliation(s)
- Prayasee Baruah
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Debojit Paul
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Jitesh Doshi
- BioInsight Solutions (OPC) Pvt. Ltd, Navi Mumbai 410210, India
| | - Sivaprasad Mitra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
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6
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Khan RA, BinSharfan II, Alterary SS, Alsaeedi H, Qais FA, AlFawaz A, Hadi AD, Alsalme A. Organometallic (η
6
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p
‐cymene)ruthenium(II) complexes with thiazolyl‐based organic twigs: En route towards targeted delivery via human serum albumin of the potential anticancer agents. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rais Ahmad Khan
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
| | - Ibtisam I. BinSharfan
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
| | - Seham S. Alterary
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
| | - Huda Alsaeedi
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
| | - Faizan Abul Qais
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences Aligarh Muslim University Aligarh India
| | - Amal AlFawaz
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
| | - Arman D. Hadi
- Department of Chemistry University of Texas at San Antonio San Antonio TX USA
| | - Ali Alsalme
- Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia
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7
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Huang ZY, Li XY, Wang ZH, Hu LY, Tu XC, Hu YJ. Synthesis of novel 3-fluorooxindoles and their affinity probing with serum albumin: Using multi-spectral, electrochemical, and molecular docking. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Poonia N, Lal K, Kumar A, Kumar A, Sahu S, Baidya ATK, Kumar R. Urea-thiazole/benzothiazole hybrids with a triazole linker: synthesis, antimicrobial potential, pharmacokinetic profile and in silico mechanistic studies. Mol Divers 2021; 26:2375-2391. [PMID: 34671895 DOI: 10.1007/s11030-021-10336-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/30/2021] [Indexed: 01/13/2023]
Abstract
Some urea-thiazole/benzothiazole hybrids with a triazole linker were synthesized via Cu(I)-catalysed click reaction. After successfully analysed by various spectral techniques including FTIR, NMR and HRMS, antimicrobial screening of the synthesized hybrids along with their precursors was carried out against two Gram (+) bacteria (Staphylococcus aureus and Bacillus endophyticus), two Gram (-) bacteria (Escherichia coli and Pseudomonas fluorescens) and two fungi (Candida albicans and Rhizopus oryzae). All the synthesized compounds (4a-4l) displayed better biological response than the standard fluconazole against both of the tested fungi. Compounds 4h and 4j were found to be the most active compounds against R. oryzae and C. albicans, respectively. Molecular docking of hybrid 4j and its alkyne precursor 1b in the active site of C. albicans target sterol 14-α demethylase was also performed and was also supported by molecular dynamics studies. In silico ADME prediction of synthesized urea-thiazole/benzothiazole hybrids with a triazole linker and their alkyne precursors was also predicted.
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Affiliation(s)
- Nisha Poonia
- Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Kashmiri Lal
- Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India.
| | - Ashwani Kumar
- Department of Pharmaceutical Sciences, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Anil Kumar
- Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, 125001, India
| | - Srikanta Sahu
- Department of Chemistry, Centurion University of Technology and Management, Jatni, Odisha, 752050, India
| | - Anurag T K Baidya
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (B.H.U.), U.P., Varanasi, 221005, India
| | - Rajnish Kumar
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, (B.H.U.), U.P., Varanasi, 221005, India
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Sehrawat H, Kumar N, Sood D, Kumar L, Tomar R, Chandra R. Unraveling the interaction of an opium poppy alkaloid noscapine ionic liquid with human hemoglobin: Biophysical and computational studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116710] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Mala John GS, Takeuchi S, Venkatraman G, Rayala SK. Nordihydroguaiaretic Acid in Therapeutics: Beneficial to Toxicity Profiles and the Search for its Analogs. Curr Cancer Drug Targets 2021; 20:86-103. [PMID: 31642411 DOI: 10.2174/1568009619666191022141547] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 07/26/2019] [Accepted: 08/22/2019] [Indexed: 12/16/2022]
Abstract
Nordihydroguaiaretic acid (NDGA) is a plant lignan obtained from creosote bush, Larrea tridentata and is known to possess antioxidant, anticancer activities and is used in traditional medicine in North America and Mexico. However, its prolonged consumption leads to liver damage and kidney dysfunction. Despite its toxicity and side effects, there is little awareness to forbid its consumption and its use in the treatment of medical ailments has continued over the years. Several reports discuss its therapeutic efficiency and its medical applications have tremendously been on the rise to date. There has been a recent surge of interest in the chemical synthesis of NDGA derivatives for therapeutic applications. NDGA derivatives have been developed as better alternatives to NDGA. Although several NDGA derivatives have been chemically synthesized as evidenced by recent literature, there is a paucity of information on their therapeutic efficacies. This review is to highlight the medicinal applications of NDGA, its toxicity evaluations and discuss the chemical derivatives of NDGA synthesized and studied so far and suggest to continue research interests in the development of NDGA analogs for therapeutic applications. We suggest that NDGA derivatives should be investigated more in terms of chemical synthesis with preferred conformational structures and exploit their biological potentials with future insights to explore in this direction to design and develop structurally modified NDGA derivatives for potential pharmacological properties.
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Affiliation(s)
| | - Satoru Takeuchi
- Factory of Takeuchi Nenshi, TAKENEN, 85NE Takamatsu, Kahoku Ishikawa 929-1215, Japan
| | - Ganesh Venkatraman
- Sri Ramachandra Center for Biomedical Nanotechnology, Sri Ramachandra Institute of Higher Education & Research, Chennai-600116, India
| | - Suresh Kumar Rayala
- Department of Biotechnology, Indian Institute of Technology (IIT), Madras, Chennai-600036, India
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Tong Q, Wu W, Hu J, Wang J, Li K, Dong B, Song B. Dimethyl Sulfoxide-Free and Water-Soluble Fluorescent Probe for Detection of Bovine Serum Albumin Prepared by Ionic Co-assembly of Amphiphiles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4532-4539. [PMID: 33823595 DOI: 10.1021/acs.langmuir.1c00072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Detection of bovine serum albumin (BSA) is an important issue in the sense of medical applications and enzymatic reactions; however, the recently developed fluorescent probes require the involvement of dimethyl sulfoxide (DMSO), which may be detrimental to proteins. In this study, we demonstrated a DMSO-free and water-soluble fluorescent probe prepared by ionic co-assembly of amphiphiles. The cationic amphiphile is a newly designed molecule (denoted by DPP-12) bearing a conjugated diketopyrrolopyrrole (DPP) and two tetraphenylethylene groups. It turns out that the fluorescence emission of DPP-12 depends on the amount of anionic amphiphilic sodium dodecyl benzene sulfonate (SDBS). The fluorescence intensity first increases and then decreases with the concentration of SDBS, and each branch presents a linear relationship. BSA consumes SDBS by the formation of complexes, thus leading to an increase of fluorescence intensity of the mixed solution of DPP-12 and SDBS. Therefore, the mixed solution of DPP-12 and SDBS was applied as a fluorescent probe to detect the low concentration of BSA by back-titration. This fluorescent probe does not require DMSO and has good tolerance to metal ions in blood and good photostability. The limit of detection is as low as 940 nM, almost 3 orders of magnitude lower than the content in organisms.
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Affiliation(s)
- Qin Tong
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Weichun Wu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jianghong Hu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Junhao Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Ke Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Bin Dong
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Bo Song
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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12
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Macii F, Detti R, Bloise FR, Giannarelli S, Biver T. Spectroscopic Analysis of the Binding of Paraquat and Diquat Herbicides to Biosubstrates. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18052412. [PMID: 33801256 PMCID: PMC7967551 DOI: 10.3390/ijerph18052412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 02/15/2021] [Accepted: 02/22/2021] [Indexed: 11/16/2022]
Abstract
The study of the interaction of persistent organic pollutants with biosubstrates helps to unravel the pathways for toxicity, however, few mechanistic data are present in the literature for these systems. We analyzed the binding of paraquat (PQ) and diquat (DQ) herbicides to natural calf thymus DNA and a DNA G-quadruplex by spectrophotometric titrations, ethidium bromide exchange tests, viscometry, and melting experiments. The interaction with bovine serum albumin (BSA) protein was studied spectrofluorimetrically at different temperatures. The retention of the targets on positive, negative, and neutral micellar aggregates and liposomes was analyzed by ultrafiltration experiments. Despite some favorable features, PQ and DQ only externally bind natural DNA and do not interact with DNA oligonucleotides. Both herbicides bind bovine serum albumin (BSA). PQ binds BSA mainly according to an electrostatics-driven process. However, ultrafiltration data also show that some hydrophobic contribution participates in the features of these systems. The practical problems related to unfavorable spectroscopic signals and inner filter effects are also discussed. Overall, both herbicides show a low affinity for nucleic acids and weak penetration into liposomes; in addition, the equilibrium constants values found for BSA system suggest optimal conditions for transport in the body.
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Affiliation(s)
- Francesca Macii
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (F.M.); (R.D.); (F.R.B.); (S.G.)
| | - Rebecca Detti
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (F.M.); (R.D.); (F.R.B.); (S.G.)
| | - Francesca Rita Bloise
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (F.M.); (R.D.); (F.R.B.); (S.G.)
| | - Stefania Giannarelli
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (F.M.); (R.D.); (F.R.B.); (S.G.)
| | - Tarita Biver
- Department of Chemistry and Industrial Chemistry, University of Pisa, 56124 Pisa, Italy; (F.M.); (R.D.); (F.R.B.); (S.G.)
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy
- Correspondence:
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13
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Jiménez-Luna J, Skalic M, Weskamp N, Schneider G. Coloring Molecules with Explainable Artificial Intelligence for Preclinical Relevance Assessment. J Chem Inf Model 2021; 61:1083-1094. [PMID: 33629843 DOI: 10.1021/acs.jcim.0c01344] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Graph neural networks are able to solve certain drug discovery tasks such as molecular property prediction and de novo molecule generation. However, these models are considered "black-box" and "hard-to-debug". This study aimed to improve modeling transparency for rational molecular design by applying the integrated gradients explainable artificial intelligence (XAI) approach for graph neural network models. Models were trained for predicting plasma protein binding, hERG channel inhibition, passive permeability, and cytochrome P450 inhibition. The proposed methodology highlighted molecular features and structural elements that are in agreement with known pharmacophore motifs, correctly identified property cliffs, and provided insights into unspecific ligand-target interactions. The developed XAI approach is fully open-sourced and can be used by practitioners to train new models on other clinically relevant endpoints.
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Affiliation(s)
- José Jiménez-Luna
- Department of Chemistry and Applied Biosciences, RETHINK, ETH Zurich, 8049 Zurich, Switzerland
| | - Miha Skalic
- Department of Medicinal Chemistry, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397 Biberach an der Riss, Germany
| | - Nils Weskamp
- Department of Medicinal Chemistry, Boehringer Ingelheim Pharma GmbH & Co. KG, Birkendorfer Straße 65, 88397 Biberach an der Riss, Germany
| | - Gisbert Schneider
- Department of Chemistry and Applied Biosciences, RETHINK, ETH Zurich, 8049 Zurich, Switzerland
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14
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Delavar Mendi F, Sh Saljooghi A, Ramezani M, Kruszynski R, Poupon M, Kucerakova M, Huch V, Socha P, Babaei M, Alibolandi M. Five new complexes with deferiprone and N,N-donor ligands: evaluation of cytotoxicity against breast cancer MCF-7 cell line and HSA-binding determination. J Biomol Struct Dyn 2020; 39:4845-4858. [PMID: 32579069 DOI: 10.1080/07391102.2020.1782769] [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: 10/24/2022]
Abstract
In this study, five new complexes containing deferiprone (dfp) and N,N-donor ligands [bipyridine (bpy), 1,10-phenanthroline (phen) and ethylenediamine (en)] were synthesized: [Fe(dfp)2(bpy)](PF6) (1), [Fe(dfp)2(phen)](PF6) (2), [Cu2(dfp)2(bpy)2](PF6)2 (3), [Ga(dfp)2(bpy)](PF6) (4), and [Fe(dfp)2(en)](PF6) (5). Characterization of these complexes was carried out through elemental analysis and FT-IR, and single-crystal X-ray crystallography was used to determine their structures. Whilst the polyhedron has a distorted octahedral geometry in 1, 2, 4, and 5, it adopts a distorted square-pyramidal geometry in 3. Interaction of these compounds with human serum albumin (HSA) has been investigated through electronic absorption and fluorescence titration techniques. Emission quenching was performed separately for each complex at three different temperatures and thermodynamic parameters were calculated using binding constants to better understand the power of different binding forces with the HSA. Results demonstrated that compounds interact strongly with the HSA with a static quenching mechanism. Our evaluation of the cytotoxicity of complexes against the breast cancer MCF-7 cell line showed that complex 2 presents a better cytotoxicity than the standard cis-Pt. Finally, using the AutoDock 4.2 program, simulations to analyze the mechanism of complex-HSA interactions and their binding mode were carried out. Results showed that the best binding mode is located in subdomain IB for 1, 2, and 4, in I/II for 3, and in IA/IIA for 5. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Fatemeh Delavar Mendi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Amir Sh Saljooghi
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohammad Ramezani
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Rafal Kruszynski
- Department of X-ray Crystallography and Crystal Chemistry, Institute of General and Ecological Chemistry, Lodz University of Technology, Lodz, Poland
| | - Morgane Poupon
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Monika Kucerakova
- Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Volker Huch
- Faculty of Natural Sciences and Technology, Department of Chemistry, Saarland University, Saarbrücken, Germany
| | - Pawel Socha
- The Czochralski Laboratory of Advanced Crystal Engineering, Faculty of Chemistry, University of Warsaw, Warsaw, Poland
| | - Maryam Babaei
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mona Alibolandi
- Pharmaceutical Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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15
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C. J, D.S. IJ, Bennie R. B, Stuart J. G, Raj A. NP, David S. T. Redox Mediated Synthesis of Ag‐CuO Hybrid Nanoparticles – DNA/BSA Binding Studies and in vitro Evaluation of Anti‐cancer Activity on MCF‐7 Cancer Cell Line. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Joel C.
- Postgraduate Department of Chemistry, St. John's College Tirunelveli 627 002 Tamil Nadu India
| | - Ivan Jebakumar D.S.
- Postgraduate Department of Chemistry, St. John's College Tirunelveli 627 002 Tamil Nadu India
| | - Biju Bennie R.
- Postgraduate Department of Chemistry, St. John's College Tirunelveli 627 002 Tamil Nadu India
| | - Gershom Stuart J.
- Postgraduate Department of Chemistry, St. John's College Tirunelveli 627 002 Tamil Nadu India
| | - Nirmal Paul Raj A.
- Postgraduate Department of Chemistry, St. John's College Tirunelveli 627 002 Tamil Nadu India
| | - Theodore David S.
- Department of Applied ChemistryPSN College of Engineering and Technology Tirunelveli 627 152 Tamil Nadu India
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16
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Hu Q, Jayasinghe‐Arachchige VM, Sharma G, Serafim LF, Paul TJ, Prabhakar R. Mechanisms of peptide and phosphoester hydrolysis catalyzed by two promiscuous metalloenzymes (insulin degrading enzyme and glycerophosphodiesterase) and their synthetic analogues. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2020. [DOI: 10.1002/wcms.1466] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Qiaoyu Hu
- Department of Chemistry, University of Miami Coral Gables Florida
| | | | - Gaurav Sharma
- Department of Chemistry, University of Miami Coral Gables Florida
| | | | - Thomas J. Paul
- Department of Chemistry, University of Miami Coral Gables Florida
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami Coral Gables Florida
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17
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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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18
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Sasmal M, Islam ASM, Bhowmick R, Maiti D, Dutta A, Ali M. Site-Selective Interaction of Human Serum Albumin with 4-Chloro-7-nitro-1,2,3-benzoxadiazole Modified Olanzapine Derivative and Effect of β-Cyclodextrin on Binding: In the Light of Spectroscopy and Molecular Docking. ACS APPLIED BIO MATERIALS 2019; 2:3551-3561. [DOI: 10.1021/acsabm.9b00429] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Mihir Sasmal
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
| | - Abu Saleh Musha Islam
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
| | - Rahul Bhowmick
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
| | - Debjani Maiti
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
| | - Ananya Dutta
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
| | - Mahammad Ali
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, India
- Vice-Chancellor, Aliah University, ll-A/27, Action Area II, Newtown, Kolkata, West Bengal 700160, India
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19
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Sharma H, Navalkar A, Maji SK, Agrawal A. Analysis of drug–protein interaction in bio-inspired microwells. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0778-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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20
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Lee S, Cho H, Cheong B. Interaction of Bovine Serum Albumin with Propyl Gallate and Methyl Gallate Investigated by Fluorescence Spectroscopy. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Seong‐June Lee
- Department of ChemistryIncheon National University Incheon 22012 South Korea
| | - Han‐Gook Cho
- Department of ChemistryIncheon National University Incheon 22012 South Korea
| | - Byeong‐Seo Cheong
- Department of ChemistryIncheon National University Incheon 22012 South Korea
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21
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Hu X, Tong Z, Wang Y, Liao D, Yin Y, Wen F. Investigation of the interaction between protein and europium doped polymer. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2018.1526038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xiaoxi Hu
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
- Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, College of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou, China
| | - Zhangfa Tong
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Yun Wang
- Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, College of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou, China
| | - Dankui Liao
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
| | - Yanzhen Yin
- Guangxi Colleges and Universities Key Laboratory of Beibu Gulf Oil and Natural Gas Resource Effective Utilization, College of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou, China
| | - Feng Wen
- College of Chemistry and Chemical Engineering, Guangxi University, Nanning, China
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22
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Mansouri-Torshizi H, Zareian-Jahromi S, Abdi K, Saeidifar M. Nonionic but water soluble, [Glycine-Pd-Alanine] and [Glycine-Pd-Valine] complexes. Their synthesis, characterization, antitumor activities and rich DNA/HSA interaction studies. J Biomol Struct Dyn 2018; 37:3566-3582. [PMID: 30284510 DOI: 10.1080/07391102.2018.1520647] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Two novel, neutral and water soluble Pd(II) complexes of formula [Pd(Gly)(Ala)] (1) and [Pd(Gly)(Val)] (2) (Gly, Ala, and Val are anionic forms of glycine, alanine, and valine amino acids, respectively) have been synthesized and characterized by FT-IR, UV-Vis, 1H-NMR, elemental analysis, and molar conductivity measurement. The data revealed that each amino acid binds to Pd(II) through the nitrogen of -NH2 and the oxygen of -COO- groups and acts as a bidentate chelate. These complexes have been assayed against leukemia cells (K562) using MTT method. The results indicated that both of the complexes display more cytotoxicity than the well-known anticancer drug, cisplatin. The interaction of the compounds with calf thymus DNA (CT-DNA) and human serum albumin (HSA) were assayed by a series of experimental techniques including electronic absorption, fluorescence, viscometry, gel electrophoresis, and FT-IR. The results indicated that the two complexes have interesting binding propensities toward CT-DNA as well as HSA and the binding affinity of (1) is more than (2). The fluorescence data indicated that both complexes strongly quench the fluorescence of ethidium bromide-DNA system as well as the intrinsic fluorescence of HSA via static quenching procedures. The thermodynamic parameters (ΔH°, ΔS°, and ΔG°) calculated from the fluorescence studies showed that hydrogen bonds and van der Waals interactions play a major role in the binding of the complexes to DNA and HSA. We suggest that both of the Pd(II) complexes exhibit the groove binding mode with CT-DNA and interact with the main binding pocket of HSA. Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Hassan Mansouri-Torshizi
- a Department of Chemistry, Faculty of Science , University of Sistan and Baluchestan , Zahedan , Iran
| | - Sareh Zareian-Jahromi
- a Department of Chemistry, Faculty of Science , University of Sistan and Baluchestan , Zahedan , Iran
| | - Khatereh Abdi
- a Department of Chemistry, Faculty of Science , University of Sistan and Baluchestan , Zahedan , Iran
| | - Maryam Saeidifar
- b Department of Nanotechnology and Advanced Materials , Materials and Energy Research Center , Karaj , Iran
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Jayasinghe‐Arachchige VM, Hu Q, Sharma G, Paul TJ, Lundberg M, Quinonero D, Parac‐Vogt TN, Prabhakar R. Hydrolysis of chemically distinct sites of human serum albumin by polyoxometalate: A hybrid QM/MM (ONIOM) study. J Comput Chem 2018; 40:51-61. [DOI: 10.1002/jcc.25528] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 06/22/2018] [Accepted: 06/23/2018] [Indexed: 12/28/2022]
Affiliation(s)
| | - Qiaoyu Hu
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Gaurav Sharma
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Thomas J. Paul
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Marcus Lundberg
- Department of Chemistry ‐ Ångström Laboratory Uppsala University 751 21, Uppsala Sweden
| | - David Quinonero
- Department of Chemistry Universitat de les Illes Balears Palma de Mallorca Spain
| | | | - Rajeev Prabhakar
- Department of Chemistry University of Miami Coral Gables Florida 33146
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Paul TJ, Parac-Vogt TN, Quiñonero D, Prabhakar R. Investigating Polyoxometalate–Protein Interactions at Chemically Distinct Binding Sites. J Phys Chem B 2018; 122:7219-7232. [DOI: 10.1021/acs.jpcb.8b02931] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Thomas J. Paul
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | | | - David Quiñonero
- Department of Chemistry, Universitat de les Illes Balears, Palma de Mallorca 07122, Spain
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
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25
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Manjubaashini N, Kesavan MP, Rajesh J, Daniel Thangadurai T. Multispectroscopic and bioimaging approach for the interaction of rhodamine 6G capped gold nanoparticles with bovine serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 183:374-384. [PMID: 29763760 DOI: 10.1016/j.jphotobiol.2018.05.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/30/2018] [Accepted: 05/04/2018] [Indexed: 02/06/2023]
Abstract
Binding interaction of Bovine Serum Albumin (BSA) with newly prepared rhodamine 6G-capped gold nanoparticles (Rh6G-Au NPs) under physiological conditions (pH 7.2) was investigated by a wide range of photophysical techniques. Rh6G-Au NPs caused the static quenching of the intrinsic fluorescence of BSA that resulted from the formation of ground-state complex between BSA and Rh6G-Au NPs. The binding constant from fluorescence quenching method (Ka = 1.04 × 104 L mol-1; LoD = 14.0 μM) is in accordance with apparent association constant (Kapp = 1.14 × 101 M-1), which is obtained from absorption spectral studies. Förster resonance energy transfer (FRET) efficiency between the tryptophan (Trp) residue of BSA and fluorophore of Rh6G-Au NPs during the interaction was calculated to be 90%. The free energy change (ΔG = -23.07 kJ/mol) of BSA-Rh6G-Au NPs complex was calculated based on modified Stern-Volmer Plot. The time-resolved fluorescence analysis confirmed that quenching of BSA follows static mechanism through the formation of ground state complex. Furthermore, synchronous and three-dimensional fluorescence measurement, Raman spectral analysis and Circular Dichroism spectrum results corroborate the strong binding between Rh6G-Au NPs and BSA, which causes the conformational changes on BSA molecule. In addition, fluorescence imaging experiments of BSA in living human breast cancer (HeLa) cells was successfully demonstrated, which articulated the value of Rh6G-Au NPs practical applications in biological systems.
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Affiliation(s)
- N Manjubaashini
- Department of Nanoscience and Technology, Sri Ramakrishana Engineering College, Coimbatore, Tamilnadu 641 022, India
| | | | | | - T Daniel Thangadurai
- Department of Nanoscience and Technology, Sri Ramakrishana Engineering College, Coimbatore, Tamilnadu 641 022, India.
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26
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Ma XJ, Zhang YJ, Zeng CM. Inhibition of Amyloid Aggregation of Bovine Serum Albumin by Sodium Dodecyl Sulfate at Submicellar Concentrations. BIOCHEMISTRY (MOSCOW) 2018. [PMID: 29534670 DOI: 10.1134/s000629791801008x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Sodium dodecyl sulfate (SDS), as an anionic surfactant, can induce protein conformational changes. Recent investigations demonstrated different effects of SDS on protein amyloid aggregation. In the present study, the effect of SDS on amyloid aggregation of bovine serum albumin (BSA) was evaluated. BSA transformed to β-sheet-rich amyloid aggregates upon incubation at pH 7.4 and 65°C, as demonstrated by thioflavin T fluorescence, circular dichroism, and transmission electron microscopy. SDS at submicellar concentrations inhibited BSA amyloid aggregation with IC50 of 47.5 µM. The inhibitory effects of structural analogs of SDS on amyloid aggregation of BSA were determined to explore the structure-activity relationship, with results suggesting that both anionic and alkyl moieties of SDS were critical, and that an alkyl moiety with chain length ≥10 carbon atoms was essential to amyloid inhibition. We attributed the inhibitory effect of SDS on BSA amyloid aggregation to interactions between the detergent molecule and the fatty acid binding sites on BSA. The bound SDS stabilized BSA, thereby inhibiting protein transformation to amyloid aggregates. This study reports for the first time that the inhibitory effect of SDS on albumin fibrillation is closely related to its alkyl structure. Moreover, the specific binding of SDS to albumin is the main driving force in amyloid inhibition. This study not only provides fresh insight into the role of SDS in amyloid aggregation of serum albumin, but also suggests rational design of novel anti-amyloidogenic reagents based on specific-binding ligands.
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Affiliation(s)
- Xue-Jiao Ma
- Shaanxi Normal University, School of Chemistry and Chemical Engineering, Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, Xi'an, 710119, China.
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27
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Alsalme A, Khan RA, Alkathiri AM, Ali MS, Tabassum S, Jaafar M, Al-Lohedan HA. β-Carboline Silver Compound Binding Studies with Human Serum Albumin: A Comprehensive Multispectroscopic Analysis and Molecular Modeling Study. Bioinorg Chem Appl 2018; 2018:9782419. [PMID: 29770145 PMCID: PMC5889910 DOI: 10.1155/2018/9782419] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/03/2018] [Accepted: 01/31/2018] [Indexed: 12/04/2022] Open
Abstract
β-Carbolines (βCs) belong to the naturally occurring alkaloid family, derived from 9H-pyrido[3,4-b]indole, also known as norharmane (Hnor). Knowing the importance of the βCs alkaloid family in biological processes, a comprehensive binding study is reported of four Ag(I) compounds containing the ligand Hnor and having different counteranions, namely, NO3-, ClO4-, BF4-, and PF6-, with human serum albumin (HSA) as a model protein. Different approaches like UV-visible, fluorescence spectroscopy, circular dichroism (CD), and molecular docking studies have been used for this purpose. The fluorescence results establish that the phenomenon of binding of Ag(Hnor) complexes to HSA can be deduced from the static quenching mechanism. The results showed a significant binding propensity of the used Ag(I) compounds towards HSA. The role of the counteranion on the binding of Ag(I) compounds to HSA appeared to be remarkable. Compounds with (ClO4-) and (NO3-) were found to have the most efficient binding towards HSA as compared to BF4-and PF6-. Circular dichroism (CD) studies made clear that conformational changes in the secondary structure of HSA were induced by the presence of Ag(I) compounds. Also, the α-helical structure of HSA was found to get transformed into a β-sheeted structure. Interestingly, (ClO4-) and (NO3-) compounds were found to induce most substantial changes in the secondary structure of HSA. The outcome of this study may contribute to understanding the propensity of proteins involved in neurological diseases (such as Alzheimer's and Parkinson's diseases) to undergo a similar transition in the presence of Ag-β-carboline compounds.
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Affiliation(s)
- Ali Alsalme
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Rais Ahmad Khan
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Arwa M. Alkathiri
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohd. Sajid Ali
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Sartaj Tabassum
- Surfactant Research Chair, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Mohammed Jaafar
- 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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Joksimović N, Baskić D, Popović S, Zarić M, Kosanić M, Ranković B, Stanojković T, Novaković SB, Davidović G, Bugarčić Z, Janković N. Synthesis, characterization, biological activity, DNA and BSA binding study: novel copper(ii) complexes with 2-hydroxy-4-aryl-4-oxo-2-butenoate. Dalton Trans 2018; 45:15067-15077. [PMID: 27711668 DOI: 10.1039/c6dt02257j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A serie of novel square pyramidal copper(ii) complexes [Cu(L)2H2O] (3a-d) with O,O-bidentate ligands [L = ethyl-2-hydroxy-4-aryl-4-oxo-2-butenoate; aryl = 3-methoxyphenyl-2a, (E)-2-phenylvinyl-2b, (E)-2-(4'-hydroxy-3'-methoxyphenyl)vinyl-2c, 3-nitrophenyl-2d, 2-thienyl-2e] were synthesized and characterized by spectral (UV-Vis, IR, ESI-MS and EPR), elemental and X-ray analysis. The antimicrobial activity was estimated by the determination of the minimal inhibitory concentration (MIC) using the broth microdilution method. The most active antibacterial compounds were 3c and 3d, while the best antifungal activity was showed by complexes 3b and 3e. The lowest MIC value (0.048 mg mL-1) was measured for 3c against Proteus mirabilis. The cytotoxic activity was tested using the MTT method on human epithelial carcinoma HeLa cells, human lung carcinoma A549 cells and human colon carcinoma LS174 cells. All complexes showed extremely better cytotoxic activity compared to cisplatin at all tested concentrations. Compound 3d expressed the best activity against all tested cell lines with IC50 values ranging from 7.45 to 7.91 μg mL-1. The type of cell death and the impact on the cell cycle for 3d and 3e were evaluated by flow cytometry. Both compounds induced apoptosis and S phase cell cycle arrest. The interactions between selected complexes (3d and 3e) and CT-DNA or bovine serum albumin (BSA) were investigated by the fluorescence spectroscopic method. Competitive experiments with ethidium bromide (EB) indicated that 3d and 3e have a propensity to displace EB from the EB-DNA complex through intercalation suggesting strong competition with EB [Ksv = (1.4 ± 0.2) and (2.9 ± 0.1) × 104 M-1, respectively]. Ksv values indicate that these complexes bind to DNA covalently and non-covalently. The achieved results in the fluorescence titration of BSA with 3d and 3e [Ka = (2.9 ± 0.2) × 106 and (2.5 ± 0.2) × 105 M, respectively] showed that the fluorescence quenching of BSA is a result of the formation of the 3d- and 3e-BSA complexes. The obtained Ka values are high enough to ensure that a significant amount of 3d and 3e gets transported and distributed through the cells.
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Affiliation(s)
- Nenad Joksimović
- Faculty of Science, University of Kragujevac, Department of Chemistry, Radoja Domanovića 12, 34000 Kragujevac, Serbia.
| | - Dejan Baskić
- Centre for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia
| | - Suzana Popović
- Centre for Molecular Medicine and Stem Cell Research, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia
| | - Milan Zarić
- Department of Biochemistry, Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia
| | - Marijana Kosanić
- Faculty of Science, University of Kragujevac, Department of Biology and Ecology, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Branislav Ranković
- Faculty of Science, University of Kragujevac, Department of Biology and Ecology, Radoja Domanovića 12, 34000 Kragujevac, Serbia
| | - Tatjana Stanojković
- Institute of Oncology and Radiology of Serbia, Pasterova 14, 11000 Belgrade, Serbia
| | - Sladjana B Novaković
- Vinča Institute of Nuclear Science, University of Belgrade University of Belgrade, P.O. Box 522, 11001, Belgrade, Serbia
| | - Goran Davidović
- Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevac, Serbia
| | - Zorica Bugarčić
- Faculty of Science, University of Kragujevac, Department of Chemistry, Radoja Domanovića 12, 34000 Kragujevac, Serbia.
| | - Nenad Janković
- Faculty of Science, University of Kragujevac, Department of Chemistry, Radoja Domanovića 12, 34000 Kragujevac, Serbia.
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Aneja B, Kumari M, Azam A, Kumar A, Abid M, Patel R. Effect of triazole-tryptophan hybrid on the conformation stability of bovine serum albumin. LUMINESCENCE 2018; 33:464-474. [DOI: 10.1002/bio.3435] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/27/2017] [Accepted: 11/06/2017] [Indexed: 12/15/2022]
Affiliation(s)
- Babita Aneja
- Medicinal Chemistry Laboratory, Department of Biosciences; Jamia Millia Islamia; New Delhi India
| | - Meena Kumari
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences; Jamia Millia Islamia (A Central University); Jamia Nagar New Delhi India
| | - Amir Azam
- Department of Chemistr; Jamia Millia Islamia; New Delhi India
| | - Amit Kumar
- Centre for Nano and Material Sciences; Jain University; Jain Global Campus, Jakkasandra Post Bangalore India
| | - Mohammad Abid
- Medicinal Chemistry Laboratory, Department of Biosciences; Jamia Millia Islamia; New Delhi India
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences; Jamia Millia Islamia (A Central University); Jamia Nagar New Delhi India
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Bhuiya S, Haque L, Das S. Association of iminium and alkanolamine forms of the benzo[c]phenanthridine alkaloid chelerythrine with human serum albumin: photophysical, thermodynamic and theoretical approach. NEW J CHEM 2018. [DOI: 10.1039/c7nj02972a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Association of isoforms of chelerythrine (CHL) with HSA.
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Affiliation(s)
- Sutanwi Bhuiya
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
| | - Lucy Haque
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
| | - Suman Das
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032
- India
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Ansari SS, Khan RH, Naqvi S. Probing the intermolecular interactions into serum albumin and anthraquinone systems: a spectroscopic and docking approach. J Biomol Struct Dyn 2017; 36:3362-3375. [DOI: 10.1080/07391102.2017.1388284] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Sameer Shakeel Ansari
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202 002, Uttar Pradesh, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202 002, Uttar Pradesh, India
| | - Saeeda Naqvi
- Department of Chemistry, Aligarh Muslim University, Aligarh, 202 002, Uttar Pradesh, India
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Hao C, Xu G, Feng Y, Lu L, Sun W, Sun R. Fluorescence quenching study on the interaction of ferroferric oxide nanoparticles with bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 184:191-197. [PMID: 28499172 DOI: 10.1016/j.saa.2017.05.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 04/30/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
Fluorescence quenching was used to study the potential interaction mechanism of Bovine serum albumin (BSA) with either hydrophilic ferroferric oxide (Fe3O4) nanoparticles (NPs) or hydrophobic Fe3O4 NPs. The experimental results indicated the mechanism between BSA and hydrophilic Fe3O4 NPs was static quenching and the one between BSA and hydrophobic Fe3O4 NPs was dynamic process that was drove by Förster's resonance energy transfer (FRET). And the binding parameters for the interaction of BSA with either hydrophilic or hydrophobic Fe3O4 NPs were calculated by using the fluorescence quenching measurement. The binding constant (KA) values of hydrophilic Fe3O4 NPs were 8518.73±23.35 (at 298K), 1190.31±15.41 (at 306K) and 321.97±8.57 (at 313K), respectively. The thermodynamic analysis implied that the intermolecular forces between BSA and hydrophilic Fe3O4 NPs were Van der Waals interaction or hydrogen bond, because the values of ΔH and ΔS between them were negative. While the one of BSA and hydrophobic Fe3O4 NPs involved hydrophobic forces, owing to the positive ΔH and ΔS between them. But they were all enthalpy-driven and exothermic, since their ΔG values were all negative. Synchronous fluorescence spectroscopy suggested that the conformation of tryptophan residue of BSA was changed in the presence of hydrophilic Fe3O4 NPs or hydrophobic Fe3O4 NPs, because the position of the maximum emission wavelength had a discernible red shift.
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Affiliation(s)
- Changchun Hao
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
| | - Guangkuan Xu
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Ying Feng
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Linhao Lu
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Wenyuan Sun
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China
| | - Runguang Sun
- Laboratory of Biophysics and Biomedical Engineering, School of Physics and Information Technology, Shaanxi Normal University, Xi'an 710062, China.
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Maji A, Beg M, Mandal AK, Das S, Jha PK, Hossain M. Study of the interaction of human serum albumin with Alstonia scholaris leaf extract-mediated silver nanoparticles having bactericidal property. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.05.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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35
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Roy N, Nath S, Paul PC, Singh TS. Fluorescence Behavior of Schiff Base-N, N'-bis(salicylidene) Trans 1, 2-Diaminocyclohexane in Proteinous and Micellar Environments. J Fluoresc 2017; 27:2295-2311. [PMID: 28831629 DOI: 10.1007/s10895-017-2171-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/10/2017] [Indexed: 11/28/2022]
Abstract
Fluorescence properties of N, N'-bis(salicylidene) trans 1, 2-diaminocyclohexane (H 2 L) is used to probe the anionic (SDS), cationic (CTAB) and nonionic (TX-100) micelles as well as in serum albumins (BSA and HSA) and chicken egg white lysozyme (LYZ) by steady state and picosecond time-resolved fluorescence spectroscopy. The fluorescence band intensity was found to increase with concomitant blue-shift with gradual addition of different surfactants. All the experimental results suggest that the probe molecule resides in the micelle-water interface rather than going into the micellar core. However, the penetration is more towards the micellar hydrocarbon core in nonionic surfactant (TX-100) while comparing with ionic surfactants (SDS and CTAB). Several mean microscopic properties such as critical micelle concentration, polarity parameters and binding constant were calculated in presence of different surfactants. The decrease in nonradiative decay rate constants in micellar environments indicates restricted motion of the probe inside the micellar nanocages with increasing fluorescence emission intensity and quantum yields. Further in this work, we also investigated the interaction behavior of the probe with different proteins at low concentrations under physiological conditions (pH = 7.4). Stern-Volmer analysis of the tryptophan (Trp) fluorescence quenching data in presence of probe reveals Stern-Volmer constant (Ksv) as well as bimolecular quenching rate constant (Kq). The binding constant as well as the number of binding sites of the probe with proteins were also monitored and found to be 1:1 stoichiometry ratio.
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Affiliation(s)
- Nayan Roy
- Department of Chemistry, Assam University, Silchar, Assam, 788 011, India
| | - Surjatapa Nath
- Department of Chemistry, Assam University, Silchar, Assam, 788 011, India
| | - Pradip C Paul
- Department of Chemistry, Assam University, Silchar, Assam, 788 011, India
| | - T Sanjoy Singh
- Department of Chemistry, Assam University, Silchar, Assam, 788 011, India.
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36
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Interactions between epinastine and human serum albumin: Investigation by fluorescence, UV–vis, FT–IR, CD, lifetime measurement and molecular docking. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.066] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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37
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Voicescu M, Ionescu S, Craciunescu O, Tatia R, Moldovan L, Teodorescu VS, Nistor CL. Synthesis, physicochemical characterization and cytotoxic properties of riboflavin loaded Myrj52–silver nanoparticles. NEW J CHEM 2017. [DOI: 10.1039/c7nj00571g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and physicochemical characterization of riboflavin (RF) loaded Myrj52–silver nanoparticles (SNPs) were performed and their cytotoxic properties were evaluated.
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Affiliation(s)
- Mariana Voicescu
- Romanian Academy
- Institute of Physical Chemistry “Ilie Murgulescu”
- 060021 Bucharest
- Romania
| | - Sorana Ionescu
- Department of Physical Chemistry
- University of Bucharest
- Bucharest 030018
- Romania
| | - Oana Craciunescu
- Department of Cellular and Molecular Biology
- National Institute of R&D for Biological Sciences
- Bucharest
- Romania
| | - Rodica Tatia
- Department of Cellular and Molecular Biology
- National Institute of R&D for Biological Sciences
- Bucharest
- Romania
| | - Lucia Moldovan
- Department of Cellular and Molecular Biology
- National Institute of R&D for Biological Sciences
- Bucharest
- Romania
| | | | - Cristina L. Nistor
- Polymer Department
- National R&D Institute for Chemistry and Petrochemistry ICECHIM
- 060021 Bucharest
- Romania
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38
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Raza M, Wei Y, Jiang Y, Ahmad A, Raza S, Ullah S, Han Y, Khan QU, Yuan Q. Molecular mechanism of tobramycin with human serum albumin for probing binding interactions: multi-spectroscopic and computational approaches. NEW J CHEM 2017. [DOI: 10.1039/c7nj02054f] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highlighting novelty: comprehensive in vitro and in silico insights for understanding the novel binding site of TOB with HSA.
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Affiliation(s)
- Muslim Raza
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Yun Wei
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Yang Jiang
- Beijing Key Lab of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Aftab Ahmad
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Saleem Raza
- State Key Laboratory of Chemical Resource Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Sadeeq Ullah
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
| | - Youyou Han
- Beijing Key Lab of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
- P. R. China
| | - Qudrat Ullah Khan
- State Key Laboratory of Chemical Resource Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Qipeng Yuan
- State Key Laboratory of Chemical Resource Engineering
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- P. R. China
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39
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Hazra M, Dolai T, Pandey A, Dey SK, Patra A. Fluorescent copper(II) complexes: The electron transfer mechanism, interaction with bovine serum albumin (BSA) and antibacterial activity. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2014.02.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Suganthi M, Elango KP. Synthesis, characterization and serum albumin binding studies of vitamin K3 derivatives. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 166:126-135. [PMID: 27898366 DOI: 10.1016/j.jphotobiol.2016.11.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 10/09/2016] [Accepted: 11/16/2016] [Indexed: 12/17/2022]
Abstract
Synthesis, characterization and bovine serum albumin (BSA) binding properties of three derivatives of vitamin K3 have been described. Results of UV-Vis and fluorescence spectra indicate complexation between BSA and the ligands with conformational changes in protein, which is strongly supported by synchronous and three dimensional fluorescence studies. Addition of the ligands quenches the fluorescence of BSA which is accompanied by reduction in quantum yield (Ф) from 0.1010 to 0.0775-0.0986 range. Thermodynamic investigations reveal that hydrophobic interaction is the major binding force in the spontaneous binding of these ligands with BSA. The binding constants obtained depend on the substituent present in the quinone ring, which correlates linearly with the Taft's field substituent constant (σF). The results show that compound with strong electron withdrawing nitro-group forms relatively stronger complex with BSA than amino and thioglycolate substituted ones. Circular dichroism studies show that the α-helical content of the protein, upon complexation with the ligands, decreases in the case of amino and nitro substituted vitamin K3 while increases in thioglycolate substituted compound. Molecular docking studies indicated that the vitamin K3 derivatives are surrounded by hydrophobic residues of the BSA molecule, which is in good agreement with the results of fluorescence spectral and thermodynamic studies.
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Affiliation(s)
- Murugesan Suganthi
- Department of Chemistry, Gandhigram Rural Institute (Deemed University), Gandhigram 624 302, India
| | - Kuppanagounder P Elango
- Department of Chemistry, Gandhigram Rural Institute (Deemed University), Gandhigram 624 302, India.
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41
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Ouyang D, Inoue S, Okazaki S, Hirakawa K. Tetrakis(N-methyl-p-pyridinio)porphyrin and its zinc complex can photosensitize damage of human serum albumin through electron transfer and singlet oxygen generation. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500991] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The photosensitized protein-damaging activity of water-soluble freebase tetrakis([Formula: see text]-methyl-[Formula: see text]-pyridinio)porphyrin (H2TMPyP), and its zinc complex (ZnTMPyP) was investigated using human serum albumin (HSA) as a target protein. These porphyrins bound to HSA and caused photosensitized oxidation of the tryptophan residue. The protein damage was enhanced in deuterium oxide and inhibited by sodium azide, a physical quencher of singlet oxygen, suggesting the contribution of singlet oxygen. However, an excess amount of sodium azide could not completely inhibit protein damage. These findings suggest the partial contribution of another mechanism to the protein damage, possibly the electron transfer mechanism. The Gibbs free energy of the electron transfer mechanism showed that electron transfer-mediated tryptophan oxidation by photoexcited H2TMPyP is more advantageous than that by ZnTMPyP. Actually, the quantum yield of protein damage through electron transfer by H2TMPyP was larger than that by ZnTMPyP. In addition, this study demonstrated that the association between porphyrin and protein plays an important role in photosensitized protein damage.
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Affiliation(s)
- Dongyan Ouyang
- Department of Optoelectronics and Nanostructure Science, Graduate School of Science and Technology, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Shiori Inoue
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan
| | - Shigetoshi Okazaki
- Medical Photonics Research Center, Hamamatsu University School of Medicine, Handayama 1-20-1, Higashi-ku, Hamamatsu, Shizuoka 431-3192, Japan
| | - Kazutaka Hirakawa
- Department of Optoelectronics and Nanostructure Science, Graduate School of Science and Technology, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan
- Applied Chemistry and Biochemical Engineering Course, Department of Engineering, Graduate School of Integrated Science and Technology, Shizuoka University, Johoku 3-5-1, Naka-ku, Hamamatsu, Shizuoka 432-8561, Japan
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Nusrat S, Siddiqi MK, Zaman M, Zaidi N, Ajmal MR, Alam P, Qadeer A, Abdelhameed AS, Khan RH. A Comprehensive Spectroscopic and Computational Investigation to Probe the Interaction of Antineoplastic Drug Nordihydroguaiaretic Acid with Serum Albumins. PLoS One 2016; 11:e0158833. [PMID: 27391941 PMCID: PMC4938263 DOI: 10.1371/journal.pone.0158833] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 06/22/2016] [Indexed: 11/19/2022] Open
Abstract
Exogenous drugs that are used as antidote against chemotheray, inflammation or viral infection, gets absorbed and interacts reversibly to the major serum transport protein i.e. albumins, upon entering the circulatory system. To have a structural guideline in the rational drug designing and in the synthesis of drugs with greater efficacy, the binding mechanism of an antineoplastic and anti-inflammatory drug Nordihydroguaiaretic acid (NDGA) with human and bovine serum albumins (HSA & BSA) were examined by spectroscopic and computational methods. NDGA binds to site II of HSA with binding constant (Kb) ~105 M-1 and free energy (ΔG) ~ -7.5 kcal.mol-1. It also binds at site II of BSA but with lesser binding affinity (Kb) ~105 M-1 and ΔG ~ -6.5 kcal.mol-1. The negative value of ΔG, ΔH and ΔS for both the albumins at three different temperatures confirmed that the complex formation process between albumins and NDGA is spontaneous and exothermic. Furthermore, hydrogen bonds and hydrophobic interactions are the main forces involved in complex formation of NDGA with both the albumins as evaluated from fluorescence and molecular docking results. Binding of NDGA to both the albumins alter the conformation and causes minor change in the secondary structure of proteins as indicated by the CD spectra.
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Affiliation(s)
- Saima Nusrat
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | | | - Masihuz Zaman
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Mohammad Rehan Ajmal
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Parvez Alam
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Atiyatul Qadeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
| | - Ali Saber Abdelhameed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh– 202002, India
- * E-mail:
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Tayyab S, Izzudin MM, Kabir MZ, Feroz SR, Tee WV, Mohamad SB, Alias Z. Binding of an anticancer drug, axitinib to human serum albumin: Fluorescence quenching and molecular docking study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:386-394. [PMID: 27424099 DOI: 10.1016/j.jphotobiol.2016.06.049] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 06/27/2016] [Accepted: 06/27/2016] [Indexed: 12/17/2022]
Abstract
Binding characteristics of a promising anticancer drug, axitinib (AXT) to human serum albumin (HSA), the major transport protein in human blood circulation, were studied using fluorescence, UV-vis absorption and circular dichroism (CD) spectroscopy as well as molecular docking analysis. A gradual decrease in the Stern-Volmer quenching constant with increasing temperature revealed the static mode of the protein fluorescence quenching upon AXT addition, thus confirmed AXT-HSA complex formation. This was also confirmed from alteration in the UV-vis spectrum of HSA upon AXT addition. Fluorescence quenching titration results demonstrated moderately strong binding affinity between AXT and HSA based on the binding constant value (1.08±0.06×10(5)M(-1)), obtained in 10mM sodium phosphate buffer, pH7.4 at 25°C. The sign and magnitude of the enthalpy change (∆H=-8.38kJmol(-1)) as well as the entropy change (∆S=+68.21Jmol(-1)K(-1)) clearly suggested involvement of both hydrophobic interactions and hydrogen bonding in AXT-HSA complex formation. These results were well supported by molecular docking results. Three-dimensional fluorescence spectral results indicated significant microenvironmental changes around Trp and Tyr residues of HSA upon complexation with AXT. AXT binding to the protein produced significant alterations in both secondary and tertiary structures of HSA, as revealed from the far-UV and the near-UV CD spectral results. Competitive drug displacement results obtained with phenylbutazone (site I marker), ketoprofen (site II marker) and hemin (site III marker) along with molecular docking results suggested Sudlow's site I, located in subdomain IIA of HSA, as the preferred binding site of AXT.
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Affiliation(s)
- Saad Tayyab
- Biomolecular Research Group, Biochemistry Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Centre of Research for Computational Sciences and Informatics for Biology, Bioindustry, Environment, Agriculture and Healthcare, University of Malaya, Kuala Lumpur, Malaysia.
| | - Mohamad Mirza Izzudin
- Biomolecular Research Group, Biochemistry Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Md Zahirul Kabir
- Biomolecular Research Group, Biochemistry Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Shevin R Feroz
- Biomolecular Research Group, Biochemistry Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Wei-Ven Tee
- Bioinformatics Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Saharuddin B Mohamad
- Bioinformatics Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia; Centre of Research for Computational Sciences and Informatics for Biology, Bioindustry, Environment, Agriculture and Healthcare, University of Malaya, Kuala Lumpur, Malaysia
| | - Zazali Alias
- Biomolecular Research Group, Biochemistry Programme, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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Shahabadi N, Hakimi M, Morovati T, Hadidi S, Moeini K. Spectroscopic investigation into the interaction of a diazacyclam-based macrocyclic copper(ii) complex with bovine serum albumin. LUMINESCENCE 2016; 32:43-50. [PMID: 27162056 DOI: 10.1002/bio.3146] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 03/17/2016] [Accepted: 03/17/2016] [Indexed: 11/07/2022]
Abstract
Cyclam-based ligands and their complexes are known to show antitumor activity. This study was undertaken to examine the interaction of a diazacyclam-based macrocyclic copper(II) complex with bovine serum albumin (BSA) under physiological conditions. The interactions of different metal-based drugs with blood proteins, especially those with serum albumin, may affect the concentration and deactivation of metal drugs, and thereby influence their availability and toxicity during chemotherapy. In this vein, several spectral methods including UV-vis absorption, fluorescence and circular dichroism (CD) spectroscopy techniques were used. Spectroscopic analysis of the fluorescence quenching confirmed that the Cu(II) complex quenched BSA fluorescence intensity by a dynamic mechanism. In order to further determine the quenching mechanism, an analysis of Stern-Volmer plots at various concentrations of BSA was carried out. It was found that the KSV value increased with the BSA concentration. It was suggested that the fluorescence quenching process was a dynamic quenching rather than a static quenching mechanism. Based on Förster's theory, the average binding distance between the Cu(II) complex and BSA (r) was found to be 4.98 nm; as the binding distance was less than 8 nm, energy transfer from BSA to the Cu(II) complex had a high possibility of occurrence. Thermodynamic parameters (positive ΔH and ΔS values) and measurement of competitive fluorescence with 1-anilinonaphthalene-8-sulphonic acid (1,8-ANS) indicated that hydrophobic interaction plays a major role in the Cu(II) complex interaction with BSA. A Job's plot of the results confirmed that there was one binding site in BSA for the Cu(II) complex (1:1 stoichiometry). The site marker competitive experiment confirmed that the Cu(II) complex was located in site I (subdomain IIA) of BSA. Finally, CD data indicated that interaction of the Cu(II) complex with BSA caused a small increase in the α-helical content. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Nahid Shahabadi
- Inorganic Chemistry Department, Faculty of Chemistry, Razi University, Kermanshah, Iran.,Medical Biology Research Center (MBRC), Kermanshah University of Medical Sciences, Iran
| | - Mohammad Hakimi
- Department of Chemistry, Payame Noor University, 19395, -4697, Tehran, Iran
| | - Teimoor Morovati
- Department of Chemistry, Payame Noor University, 19395, -4697, Tehran, Iran
| | - Saba Hadidi
- Inorganic Chemistry Department, Faculty of Chemistry, Razi University, Kermanshah, Iran.,Medical Biology Research Center (MBRC), Kermanshah University of Medical Sciences, Iran
| | - Keyvan Moeini
- Department of Chemistry, Payame Noor University, 19395, -4697, Tehran, Iran
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Characterization of the binding of an anticancer drug, lapatinib to human serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 160:229-39. [PMID: 27128364 DOI: 10.1016/j.jphotobiol.2016.04.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 04/06/2016] [Accepted: 04/06/2016] [Indexed: 12/20/2022]
Abstract
Interaction of a promising anticancer drug, lapatinib (LAP) with the major transport protein in human blood circulation, human serum albumin (HSA) was investigated using fluorescence and circular dichroism (CD) spectroscopy as well as molecular docking analysis. LAP-HSA complex formation was evident from the involvement of static quenching mechanism, as revealed by the fluorescence quenching data analysis. The binding constant, Ka value in the range of 1.49-1.01×10(5)M(-1), obtained at three different temperatures was suggestive of the intermediate binding affinity between LAP and HSA. Thermodynamic analysis of the binding data (∆H=-9.75kJmol(-1) and ∆S=+65.21Jmol(-1)K(-1)) suggested involvement of both hydrophobic interactions and hydrogen bonding in LAP-HSA interaction, which were in line with the molecular docking results. LAP binding to HSA led to the secondary and the tertiary structural alterations in the protein as evident from the far-UV and the near-UV CD spectral analysis, respectively. Microenvironmental perturbation around Trp and Tyr residues in HSA upon LAP binding was confirmed from the three-dimensional fluorescence spectral results. LAP binding to HSA improved the thermal stability of the protein. LAP was found to bind preferentially to the site III in subdomain IB on HSA, as probed by the competitive drug displacement results and supported by the molecular docking results. The effect of metal ions on the binding constant between LAP and HSA was also investigated and the results showed a decrease in the binding constant in the presence of these metal ions.
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46
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Green synthesis, characterization, photocatalytic, fluorescence and antimicrobial activities of Cochlospermum gossypium capped Ag2S nanoparticles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 157:57-69. [DOI: 10.1016/j.jphotobiol.2016.02.002] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/12/2016] [Accepted: 02/01/2016] [Indexed: 11/17/2022]
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47
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Sudha N, Sameena Y, Enoch IVMV. β-Cyclodextrin Encapsulates Biochanin A and Influences its Binding to Bovine Serum Albumin: Alteration of the Binding Strength. J SOLUTION CHEM 2016. [DOI: 10.1007/s10953-016-0446-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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48
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Vaishanav SK, Korram J, Nagwanshi R, Ghosh KK, Satnami ML. Adsorption Kinetics and Binding Studies of Protein Quantum Dots Interaction: A Spectroscopic Approach. J Fluoresc 2016; 26:855-65. [DOI: 10.1007/s10895-016-1773-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Accepted: 01/19/2016] [Indexed: 11/24/2022]
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49
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Kabir MZ, Tee WV, Mohamad SB, Alias Z, Tayyab S. Interaction of an anticancer drug, gefitinib with human serum albumin: insights from fluorescence spectroscopy and computational modeling analysis. RSC Adv 2016. [DOI: 10.1039/c6ra12019a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Binding orientation of the GEF in the binding site III, located in subdomain IB of HSA.
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Affiliation(s)
- Md. Zahirul Kabir
- Biomolecular Research Group
- Biochemistry Programme
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
| | - Wei-Ven Tee
- Bioinformatics Programme
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Saharuddin B. Mohamad
- Bioinformatics Programme
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
- Kuala Lumpur
| | - Zazali Alias
- Biomolecular Research Group
- Biochemistry Programme
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
| | - Saad Tayyab
- Biomolecular Research Group
- Biochemistry Programme
- Institute of Biological Sciences
- Faculty of Science
- University of Malaya
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50
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Janković N, Muškinja J, Ratković Z, Bugarčić Z, Ranković B, Kosanić M, Stefanović S. Solvent-free synthesis of novel vanillidene derivatives of Meldrum's acid: biological evaluation, DNA and BSA binding study. RSC Adv 2016. [DOI: 10.1039/c6ra07711k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of novel O-alkyl vanillidene derivatives containing Meldrum's acid scaffold under solvent-free conditions were synthesized.
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Affiliation(s)
- Nenad Janković
- Faculty of Science
- University of Kragujevac
- Department of Chemistry
- 34000 Kragujevac
- Serbia
| | - Jovana Muškinja
- Faculty of Science
- University of Kragujevac
- Department of Chemistry
- 34000 Kragujevac
- Serbia
| | - Zoran Ratković
- Faculty of Science
- University of Kragujevac
- Department of Chemistry
- 34000 Kragujevac
- Serbia
| | - Zorica Bugarčić
- Faculty of Science
- University of Kragujevac
- Department of Chemistry
- 34000 Kragujevac
- Serbia
| | - Branislav Ranković
- Faculty of Science
- University of Kragujevac
- Department of Biology and Ecology
- 34000 Kragujevac
- Serbia
| | - Marijana Kosanić
- Faculty of Science
- University of Kragujevac
- Department of Biology and Ecology
- 34000 Kragujevac
- Serbia
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