151
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Zhao L, Chen D. Characterization of interactions between methoxatin disodium salt and human serum albumin by pressure-assisted capillary electrophoresis/frontal analysis and circular dichroism spectroscopy. Biomed Chromatogr 2014; 29:123-8. [DOI: 10.1002/bmc.3248] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 04/01/2014] [Accepted: 04/17/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Lijuan Zhao
- Laboratory of Pharmaceutical Analysis, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 People's Republic of China
| | - Dongying Chen
- Laboratory of Pharmaceutical Analysis, Shanghai Institute of Materia Medica; Chinese Academy of Sciences; Shanghai 201203 People's Republic of China
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152
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Kumari M, Maurya JK, Singh UK, Khan AB, Ali M, Singh P, Patel R. Spectroscopic and docking studies on the interaction between pyrrolidinium based ionic liquid and bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 124:349-356. [PMID: 24508873 DOI: 10.1016/j.saa.2014.01.012] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 12/26/2013] [Accepted: 01/05/2014] [Indexed: 06/03/2023]
Abstract
The interaction of synthesized ionic liquid, 1-butyl-1-methyl-2-oxopyrrolidinium bromide (BMOP) and bovine serum albumin (BSA) was investigated using UV-Vis, FT-IR, steady state and time resolved fluorescence measurements and docking studies. Steady state spectra revealed that BMOP strongly quenched the intrinsic fluorescence of BSA through dynamic quenching mechanism. The corresponding thermodynamic parameters; Gibbs free energy change (ΔG), entropy change (ΔS) and enthalpy change (ΔH) showed that the binding process was spontaneous and entropy driven. It is also indicated that hydrophobic forces play a key role in the binding of BMOP to BSA. The synchronous fluorescence spectroscopy reveals that the conformation of BSA changed in the presence of BMOP. The shift in amide I band of FT-IR spectrum of BSA suggested unfolding of the protein secondary structure upon the addition of BMOP. In addition, the molecular modeling study of BSA-BMOP system shows that BMOP binds with BSA at the interface between two sub domains IIA and IIIA, which is located just above the entrance of the binding pocket of IIA through hydrophobic and hydrogen bond interactions in which hydrophobic interaction are dominated.
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Affiliation(s)
- Meena Kumari
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Jitendra Kumar Maurya
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Upendra Kumar Singh
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Abbul Bashar Khan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Maroof Ali
- Department of Chemistry, Jamia Millia Islamia (A Central University), New Delhi, India
| | - Prashant Singh
- Department of Chemistry, A. R. S. D. College, University of Delhi, Delhi, India
| | - Rajan Patel
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi, India.
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153
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Fang B, Zhang M, Tian M, Jiang L, Guo HY, Ren FZ. Bovine lactoferrin binds oleic acid to form an anti-tumor complex similar to HAMLET. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1841:535-43. [DOI: 10.1016/j.bbalip.2013.12.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 12/08/2013] [Accepted: 12/14/2013] [Indexed: 10/25/2022]
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154
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Wang B, Xu B. Transition model for ricin-aptamer interactions with multiple pathways and energy barriers. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:022720. [PMID: 25353521 DOI: 10.1103/physreve.89.022720] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Indexed: 06/04/2023]
Abstract
We develop a transition model to interpret single-molecule ricin-aptamer interactions with multiple unbinding pathways and energy barriers measured by atomic force microscopy dynamic force spectroscopy. Molecular simulations establish the relationship between binding conformations and the corresponding unbinding pathways. Each unbinding pathway follows a Bell-Evans multiple-barrier model. Markov-type transition matrices are developed to analyze the redistribution of unbinding events among the pathways under different loading rates. Our study provides detailed information about complex behaviors in ricin-aptamer unbinding events.
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Affiliation(s)
- Bin Wang
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia, Athens, Georgia 30602, USA
| | - Bingqian Xu
- Single Molecule Study Laboratory, College of Engineering and Nanoscale Science and Engineering Center, University of Georgia, Athens, Georgia 30602, USA
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155
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Huang S, Zhu F, Xiao Q, Zhou Q, Su W, Qiu H, Hu B, Sheng J, Huang C. Combined spectroscopy and cyclic voltammetry investigates the interaction between [(η6-p-cymene)Ru(benzaldehyde-N(4)-phenylthiosemicarbazone)Cl]Cl anticancer drug and human serum albumin. RSC Adv 2014. [DOI: 10.1039/c4ra06083k] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The interaction between Ru anticancer drug and HSA was investigated systematically under physiological conditions.
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Affiliation(s)
- Shan Huang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University)
- Ministry of Education
| | - Fawei Zhu
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
| | - Qi Xiao
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University)
- Ministry of Education
| | - Quan Zhou
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
| | - Wei Su
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
| | - Hangna Qiu
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
| | - Baoqing Hu
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University)
- Ministry of Education
- China
| | - Jiarong Sheng
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
| | - Chusheng Huang
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning 530001, P. R. China
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156
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Zhang X, Zhai H, Gao R, Zhang J, Zhang Y, Zheng X. Study on the interaction between 4-thio-5-methyluridine and human serum albumin by spectroscopy and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:724-731. [PMID: 24374886 DOI: 10.1016/j.saa.2013.11.113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 11/24/2013] [Accepted: 11/26/2013] [Indexed: 06/03/2023]
Abstract
The interaction between 4-thio-5-methyluridine and human serum albumin (HSA) under simulative physiological conditions has been studied by the methods of fluorescence, UV-VIS absorbance and circular dichroism (CD) spectroscopy. The results show that 4-thio-5-methyluridine has a static fluorescence quenching on human serum albumin (HSA). The main forces of both interactions have typical static interaction from thermodynamic data to the determination. The experimental result was in correspondence with molecular modeling theory.
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Affiliation(s)
- Xiaohui Zhang
- College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China.
| | - Hongxiu Zhai
- College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
| | - Ruiqi Gao
- College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
| | - Juling Zhang
- MOE Key laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, Guangdong 510631, China
| | - Yue Zhang
- College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
| | - Xuefang Zheng
- College of Environment and Chemical Engineering, Dalian University, Dalian, Liaoning 116622, China
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157
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Interaction of Sulfadiazine with Model Water Soluble Proteins: A Combined Fluorescence Spectroscopic and Molecular Modeling Approach. J Fluoresc 2013; 24:579-88. [DOI: 10.1007/s10895-013-1330-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/20/2013] [Indexed: 10/26/2022]
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158
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Brgles M, Kurtović T, Kovačič L, Križaj I, Barut M, Lang Balija M, Allmaier G, Marchetti-Deschmann M, Halassy B. Identification of proteins interacting with ammodytoxins in Vipera ammodytes ammodytes venom by immuno-affinity chromatography. Anal Bioanal Chem 2013; 406:293-304. [DOI: 10.1007/s00216-013-7453-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 10/16/2013] [Accepted: 10/17/2013] [Indexed: 11/28/2022]
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159
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Morais TS, Santos FC, Corte-Real L, Garcia MH. Exploring the effect of the ligand design on the interactions between [Ru(η(5)-C5H5)(PPh3)(N,O)][CF3SO3] complexes and human serum albumin. J Inorg Biochem 2013; 129:94-101. [PMID: 24096130 DOI: 10.1016/j.jinorgbio.2013.09.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 09/10/2013] [Accepted: 09/10/2013] [Indexed: 01/02/2023]
Abstract
Ruthenium complexes hold a great potential in chemotherapy as an alternative to the classical platinum based drugs. The organometallic compounds studied in the present work were previously found to exhibit important anticancer activities. Here we have investigated the binding of three ruthenium compounds, namely [Ru(η(5)-C5H5)(PPh3)(bopy)][CF3SO3] 1, [Ru(η(5)-C5H5)(PPh3)(2-ap)][CF3SO3] 2, and [Ru(η(5)-C5H5)(PPh3)(isoquinpk)][CF3SO3] 3 (bopy=2-benzoylpyridine; 2-ap=2-acetylpyridine; isoquinpk=1-isoquinolinyl phenyl ketone) to fatty acid human serum albumin (HSA) and fatty acid-free human serum albumin (HSA(faf)) at physiological pH7.4. The influence of the substituent groups on the heteroaromatic (N,O) coordinated ligand was also studied by fluorescence spectroscopy to get information about this binding. The Stern-Volmer quenching constants (KSV) were calculated at 293, 298 and 310K, with the corresponding thermodynamic parameters ∆G, ∆H and ∆S as well. The fluorescence quenching method was used to determine the number of binding sites (n) and association constants (Ka) at the same temperatures. The binding site to HSA was confirmed by competitive studies of the ruthenium compounds with warfarin.
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Affiliation(s)
- Tânia S Morais
- Centro de Ciências Moleculares e Materiais, Faculdade de Ciências da Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal
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160
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Yao Q, Yu X, Zheng T, Liu H, Yang Y, Yi P. Spectroscopic studies on the interaction of carteolol hydrochloride and urea-induced bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 113:447-451. [PMID: 23747387 DOI: 10.1016/j.saa.2013.04.129] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Revised: 04/25/2013] [Accepted: 04/29/2013] [Indexed: 06/02/2023]
Abstract
The interaction of carteolol hydrochloride, to 0.2 mol L(-1) urea-induced bovine serum albumin in aqueous solution has been first investigated by fluorescence spectra and ultraviolet-visible (UV-vis) spectra at pH 7.40. The quenching mechanism, binding parameter and sites (n), the binding mode (ΔG, ΔH, and ΔS) as well as the binding distance (r) have been obtained according to the experimental results. We also use the synchronous fluorescence method to study the effect of CTL on the conformation change of urea-induced BSA.
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Affiliation(s)
- Qing Yao
- Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, PR China
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161
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Pu H, Jiang H, Chen R, Wang H. Studies on the interaction between vincamine and human serum albumin: a spectroscopic approach. LUMINESCENCE 2013; 29:471-9. [DOI: 10.1002/bio.2572] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/12/2013] [Accepted: 07/12/2013] [Indexed: 12/27/2022]
Affiliation(s)
- Hanlin Pu
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou People's Republic of China
| | - Hua Jiang
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou People's Republic of China
| | - Rongrong Chen
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou People's Republic of China
| | - Hongcui Wang
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou People's Republic of China
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162
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pH-insensitive electrostatic interaction of carmoisine with two serum proteins: A possible caution on its uses in food and pharmaceutical industry. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 124:50-62. [DOI: 10.1016/j.jphotobiol.2013.04.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 04/05/2013] [Accepted: 04/11/2013] [Indexed: 11/20/2022]
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163
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Zhang W, Xiong X, Wang F, Ge Y, Liu Y. Studies of the Interaction Between Ronidazole and Human Serum Albumin by Spectroscopic and Molecular Docking Methods. J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-0027-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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164
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Cui Y, Hao E, Hui G, Guo W, Cui F. Investigations on the interactions of diclofenac sodium with HSA and ctDNA using molecular modeling and multispectroscopic methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 110:92-99. [PMID: 23557778 DOI: 10.1016/j.saa.2013.01.093] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Revised: 01/23/2013] [Accepted: 01/27/2013] [Indexed: 06/02/2023]
Abstract
A tentative study on interaction of diclofenac sodium (DF-Na) with human serum albumin (HSA) and calf thymus DNA (ctDNA) was conducted by using multi-spectroscopic and molecular modeling techniques under simulative physiological conditions. The results of spectroscopic measurements suggested that the quenching mechanisms were static quenching. Three-dimensional fluorescence spectroscopy clearly demonstrated the occurrence of conformational changes of HSA with addition of DF-Na. In addition, competitive studies with ethidium bromide (EB) have shown that DF-Na can bind to ctDNA relatively strong via groove binding. Based on the values of thermodynamic parameters and the results of molecular modeling, it was confirmed that hydrophobic forces and hydrogen bond were the mainly binding forces in DF-Na-HSA and DF-Na-DNA systems. The binding distance between DF-Na and HSA was also determined using the theory of the Förster energy transference.
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Affiliation(s)
- Yanrui Cui
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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165
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Elucidation of Monomerization Effect of PVP on Chlorin e6 Aggregates by Spectroscopic, Chemometric, Thermodynamic and Molecular Simulation Studies. J Fluoresc 2013; 23:1065-76. [DOI: 10.1007/s10895-013-1236-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Accepted: 05/09/2013] [Indexed: 12/18/2022]
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166
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Li Y, Wei H, Liu R. A probe to study the toxic interaction of tartrazine with bovine hemoglobin at the molecular level. LUMINESCENCE 2013; 29:195-200. [DOI: 10.1002/bio.2510] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2012] [Revised: 01/14/2013] [Accepted: 02/24/2013] [Indexed: 11/06/2022]
Affiliation(s)
- Yating Li
- School of Environmental Science and Engineering; Shandong University; People's Republic of China
| | - Haoran Wei
- School of Environmental Science and Engineering; Shandong University; People's Republic of China
| | - Rutao Liu
- School of Environmental Science and Engineering; Shandong University; People's Republic of China
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167
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Chen R, Jiang H, Pu H. Interaction of artemisinin and its derivatives with human serum albumin studied using spectroscopies and molecular modeling methods. Mol Biol Rep 2013; 40:4791-804. [DOI: 10.1007/s11033-013-2575-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 04/29/2013] [Indexed: 11/29/2022]
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168
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Rago F, Cheeseman IM. Review series: The functions and consequences of force at kinetochores. ACTA ACUST UNITED AC 2013; 200:557-65. [PMID: 23460675 PMCID: PMC3587826 DOI: 10.1083/jcb.201211113] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Chromosome segregation requires the generation of force at the kinetochore—the multiprotein structure that facilitates attachment of chromosomes to spindle microtubules. This force is required both to move chromosomes and to signal the formation of proper bioriented attachments. To understand the role of force in these processes, it is critical to define how force is generated at kinetochores, the contributions of this force to chromosome movement, and how the kinetochore is structured and organized to withstand and respond to force. Classical studies and recent work provide a framework to dissect the mechanisms, functions, and consequences of force at kinetochores.
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Affiliation(s)
- Florencia Rago
- Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology, Cambridge, MA 0214, USA
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169
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Shuai L, Chen Z, Fei P, Wang Q, Yang T. Spectroscopic analysis on the interaction of ferulic acid and tetramethylpyrazine with trypsin. LUMINESCENCE 2013; 29:79-86. [DOI: 10.1002/bio.2506] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 02/01/2013] [Accepted: 02/05/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Li Shuai
- College of Pharmacy; South Central University for Nationalities; Wuhan 430074 People's Republic of China
| | - Zhi Chen
- Center of Analysis; Guangdong Medical College; Dongguan 523808 People's Republic of China
| | - Peng Fei
- College of Pharmacy; South Central University for Nationalities; Wuhan 430074 People's Republic of China
| | - Qiang Wang
- College of Pharmacy; South Central University for Nationalities; Wuhan 430074 People's Republic of China
| | - Tianming Yang
- College of Pharmacy; South Central University for Nationalities; Wuhan 430074 People's Republic of China
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170
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Fluorescence modulation and associative behavior of lumazine in hydrophobic domain of micelles and bovine serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 121:37-45. [DOI: 10.1016/j.jphotobiol.2013.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 02/13/2013] [Accepted: 02/13/2013] [Indexed: 11/21/2022]
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171
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Wu HF, Gopal J, Abdelhamid HN, Hasan N. Quantum dot applications endowing novelty to analytical proteomics. Proteomics 2013; 12:2949-61. [PMID: 22930415 DOI: 10.1002/pmic.201200295] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review surveys all the state-of-art applications of quantum dots (QDs) in conventional and modern analytical methods in proteomic studies. A brief introduction of QDs and their properties is initially presented followed by outlining the application of QDs in fluorescence, MS, imaging, and cancer-based proteomics. The in-depth application of QDs in MALDI-MS and surface assisted laser desorption/ionization-MS has been elaborately discussed, summarizing the speculated mechanism behind the protein-QDs interactions during QD matrix applications leading to enhanced detection sensitivity.
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Affiliation(s)
- Hui-Fen Wu
- Department of Chemistry, National Sun Yat Sen University, Kaohsiung, Taiwan.
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172
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Graphene oxide as a nanocarrier for loading and delivery of medicinal drugs and as a biosensor for detection of serum albumin. Anal Chim Acta 2013; 769:40-8. [DOI: 10.1016/j.aca.2013.01.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 01/10/2013] [Accepted: 01/16/2013] [Indexed: 11/19/2022]
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173
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Xiao CQ, Feng BY, Ge YS, Fan XY, Jiang FL, Xiao G, Liu Y. Comprehensive Study of the Interaction Between a Potential Antiprion Cationic Porphyrin and Human Prion Protein at Different pH by Using Multiple Spectroscopic Methods. J Pharm Sci 2013; 102:1076-85. [DOI: 10.1002/jps.23420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 11/04/2012] [Accepted: 11/21/2012] [Indexed: 11/09/2022]
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174
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Systematically investigations of conformation and thermodynamics of HSA adsorbed to different sizes of CdTe quantum dots. Colloids Surf B Biointerfaces 2013; 102:76-82. [DOI: 10.1016/j.colsurfb.2012.08.028] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/03/2012] [Accepted: 08/16/2012] [Indexed: 12/19/2022]
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175
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Pu H, Jiang H, Chen R. Combined multispectroscopic and molecular docking investigation on the interaction between strictosamide and human serum albumin. LUMINESCENCE 2013; 28:482-9. [DOI: 10.1002/bio.2480] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 11/28/2012] [Accepted: 11/30/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Hanlin Pu
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou; 510632; People's Republic of China
| | - Hua Jiang
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou; 510632; People's Republic of China
| | - Rongrong Chen
- Department of Cell Biology, College of Life Science and Technology; Jinan University; Guangzhou; 510632; People's Republic of China
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176
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Geng S, Liu G, Li W, Cui F. Molecular interaction of ctDNA and HSA with sulfadiazine sodium by multispectroscopic methods and molecular modeling. LUMINESCENCE 2013; 28:785-92. [DOI: 10.1002/bio.2457] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 10/14/2012] [Accepted: 10/24/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Shaoguang Geng
- School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang; 453007; China
| | - Guosheng Liu
- College of Life Sciences; Henan Normal University; Xinxiang; 453007; China
| | - Wei Li
- School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang; 453007; China
| | - Fengling Cui
- School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang; 453007; China
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177
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Molecular Modeling and Spectroscopic Studies on the Interaction of Transresveratrol with Bovine Serum Albumin. J CHEM-NY 2013. [DOI: 10.1155/2013/494706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The interaction of transresveratrol (TRES) with bovine serum albumin (BSA) has been investigated by ultraviolet-visible, fluorescence, Fourier transform infrared spectroscopic methods and molecular modeling techniques. The fluorescence results show that the intrinsic fluorescence of BSA is quenched by TRES through a static quenching procedure. The binding constants of TRES with BSA at 292, 297 and 302 K are calculated as10.22×104,8.71×104, and7.59×104 L mol−1, respectively, and corresponding numbers of binding sites are approximately equal to unity. The thermodynamic parameters ΔHand ΔSare estimated to be −21.82 kJ mol−1and +21.15 J mol−1 K−1, which indicates that the interaction of TRES with BSA is driven mainly by hydrophobic forces and there are also hydrogen bonds and electrostatic interactions. The competitive experiments suggest that the binding site of TRES to BSA is probably located on site II. The results of infrared spectra show that the binding of TRES with BSA leads to conformational changes of BSA, and the binding stabilizes theα-helix andβ-sheet at the cost of a corresponding loss in theβ-turn structure of BSA. The results of molecular modeling calculation clarify the binding mode and the binding sites which are in good accordance with the experiment results.
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178
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Manna A, Chakravorti S. Role of block copolymer-micelle nanocomposites in dye–bovine serum albumin binding: a combined experimental and molecular docking study. ACTA ACUST UNITED AC 2013; 9:246-57. [DOI: 10.1039/c2mb25368b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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179
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Kumar D, Ghosh S, Bhattacharya S. Dynamical instabilities of a Brownian particle in weak adhesion. J Chem Phys 2012; 137:224901. [DOI: 10.1063/1.4769385] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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180
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Zhang H, Li F, Dever B, Li XF, Le XC. DNA-mediated homogeneous binding assays for nucleic acids and proteins. Chem Rev 2012; 113:2812-41. [PMID: 23231477 DOI: 10.1021/cr300340p] [Citation(s) in RCA: 339] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hongquan Zhang
- Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada T6G 2G3
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181
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Investigation on the Binding Behavior of Ellagic Acid to Human Serum Albumin in Aqueous Solution. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9938-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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182
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Systematically investigation of interactions between BSA and different charge-capped CdSe/ZnS quantum dots. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.08.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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183
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Li W, Liu T, Li Z, Wang Y. Study of the Interaction between a Water-soluble Cationic Fluorescent Conjugated Polymer and Bovine Serum Albumin. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9912-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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184
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Caruso IP, Vilegas W, Fossey MA, Cornélio ML. Exploring the binding mechanism of Guaijaverin to human serum albumin: fluorescence spectroscopy and computational approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:449-455. [PMID: 22820048 DOI: 10.1016/j.saa.2012.06.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Revised: 06/22/2012] [Accepted: 06/25/2012] [Indexed: 06/01/2023]
Abstract
The Guaijaverin (Gua) is a polyphenolic substance which exhibits some pharmacological activities such as antibacterial and antioxidant activities. Here we have investigated the binding of Gua with human serum albumin (HSA) at physiological pH 7.0. In this study, the fluorescence spectroscopy, ab initio and molecular modeling calculations were applied. The Stern-Volmer quenching constant (K(SV)) and its modified form (K(a)) were calculated at 298, 303 and 308 K, with the corresponding thermodynamic parameters ΔH, ΔG and ΔS as well. The fluorescence quenching method was used to determine the number of binding sites (n) and binding constants (K(b)) values at 298, 303 and 308 K. The distance between donor (HSA) and acceptor (Gua) was estimated according to fluorescence resonance energy transfer. The geometry optimization of Gua was performed in its ground state by using ab initio DFT/B3LYP functional with a 6-31G(d,p) basis set used in calculations. Molecular modeling calculation indicated that the Gua is located within the hydrophobic pocket of the subdomain IIA of HSA. The theoretical results obtained by molecular modeling were corroborated by fluorescence spectroscopy data.
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Affiliation(s)
- Icaro P Caruso
- Instituto de Biociências, Letras e Ciências Exatas (IBILCE), UNESP, Rua Cristovão Colombo, 2265, CEP 15054-000, São José do Rio Preto, SP, Brazil.
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185
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Ni Y, Zhang F, Kokot S. Enantioselective binding interaction of the metolachlor pesticide enatiomers with bovine serum albumin--a spectroscopic analysis study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:753-761. [PMID: 22898111 DOI: 10.1016/j.saa.2012.07.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Accepted: 07/13/2012] [Indexed: 06/01/2023]
Abstract
Enantioselective binding interaction of the pesticides, metolachlor (RAC-metolachlor) and its S-enantiomer (S-metolachlor), with bovine serum albumin (BSA) was investigated by fluorescence and UV-vis absorption spectroscopy. Both RAC- and S-metolachlors quenched the intrinsic fluorescence of BSA via a static mechanism, and various binding parameters indicated that electrostatic forces were involved in the binding of both of these compounds. Site marker competitive experiments demonstrated that S-metolachlor bound to site I of BSA, while R-metolachlor bound to site II, indicating the importance of enantiomeric factors for binding site selection. Further experiments showed that S-metolachlor had a higher binding affinity to BSA than R-metolachlor. The obtained spectral data were resolved with use of the multivariate curve resolution-alternating least squares method (MCR-ALS), and the extracted concentration profiles of the reacting species in the interaction were obtained. These profiles indicated that S-metolachlor was the main active constituent of RAC-metolachlor for binding with BSA, and these findings have significant implications in providing an explanation why S-metolachlor is the preferred herbicide in practice than RAC-metolachlor.
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Affiliation(s)
- Yongnian Ni
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
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186
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Ojha H, Mishra K, Hassan MI, Chaudhury NK. Spectroscopic and isothermal titration calorimetry studies of binding interaction of ferulic acid with bovine serum albumin. THERMOCHIMICA ACTA 2012; 548:56-64. [DOI: 10.1016/j.tca.2012.08.016] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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187
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Lai L, Lin C, Xu ZQ, Han XL, Tian FF, Mei P, Li DW, Ge YS, Jiang FL, Zhang YZ, Liu Y. Spectroscopic studies on the interactions between CdTe quantum dots coated with different ligands and human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:366-376. [PMID: 22797377 DOI: 10.1016/j.saa.2012.06.025] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 06/10/2012] [Accepted: 06/16/2012] [Indexed: 06/01/2023]
Abstract
This paper investigates the interactions between human serum albumin (HSA) and CdTe quantum dots (QDs) with nearly identical hydrodynamic size, but capped with four different ligands (MPA, NAC, and GSH are negatively charged; CA is positively charged) under physiological conditions. The investigation was carried out using fluorescence spectroscopy, circular dichroism (CD) spectra, UV-vis spectroscopy, and dynamic light scattering (DLS). The results of fluorescence quenching and UV-vis absorption spectra experiments indicated the formation of the complex of HSA and negatively charged QDs (MPA-CdTe, NAC-CdTe, and GSH-CdTe), which was also reconfirmed by the increasing of the hydrodynamic radius of QDs. The K(a) values of the three negatively charged QDs are of the same order of magnitude, indicating that the interactions are related to the nanoparticle itself rather than the ligands. ΔH<0 and ΔS>0 implied that the electrostatic interactions play predominant roles in the adsorption process. Furthermore, it was also proven that QDs can induce the conformational changes of HSA from the CD spectra and the three-dimensional fluorescence spectra of HSA. However, our results demonstrate that the interaction mechanism between the positively charged QDs (CA-CdTe) and HSA is significantly different from negatively charged QDs. For CA-CdTe QDs, both the static and dynamic quenching occur within the investigated range of concentrations. According to the DLS results, some large-size agglomeration also emerged.
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Affiliation(s)
- Lu Lai
- State Key Laboratory of Virology & Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecule Sciences, Wuhan University, Wuhan 430072, PR China
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188
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Wang R, Chai Y, Wang R, Zhang L, Wu J, Chang J. Study of the interaction between bovine serum albumin and analogs of Biphenyldicarboxylate by spectrofluorimetry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:324-331. [PMID: 22706097 DOI: 10.1016/j.saa.2012.05.030] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 05/04/2012] [Accepted: 05/14/2012] [Indexed: 06/01/2023]
Abstract
This work was designed to study the interaction between bovine serum albumin (BSA) and Biphenyldicarboxylate (DDB) or analogs (I, II and III) of DDB by UV-visible and fluorescence spectroscopic methods for the first time. Results showed that both DDB and analogs had a strong ability to quench the intrinsic fluorescence of BSA through a static quenching procedure. The binding constants (K) were calculated according to the relevant fluorescence data. The thermodynamic parameters (ΔH, ΔS and ΔG) showed that the hydrophobic force played a major role in the binding interaction between BSA and DDB or analogs. Synchronous fluorescence spectra of BSA were investigated in the presence of DDB or analogs. It was showed that DDB was the strongest quencher and bound to BSA with the highest affinity among four compounds. The influence of molecular structure on the binding aspects was reported.
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Affiliation(s)
- Ruiyong Wang
- Department of Chemistry, Zhengzhou University, Zhengzhou 450001, China
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189
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Manivannan C, Renganathan R. Spectroscopic investigation on the interaction of 9-aminoacridine with certain dyes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:685-692. [PMID: 22584125 DOI: 10.1016/j.saa.2012.04.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 04/12/2012] [Accepted: 04/18/2012] [Indexed: 05/31/2023]
Abstract
The fluorescence quenching of 9-Aminoacridine (9-AA) by various dyes were probed in aqueous medium using steady state and time resolved fluorescence spectroscopic techniques. From these techniques, we had rationalized the interaction of 9-AA with various dyes via ground state complex formation. The binding constant (K) and number of binding sites (n) were calculated from the relevant fluorescence quenching data. The fluorescence emission of 9-Aminoacridine was quenched by the dyes through static quenching followed by the mechanism of energy transfer. The static quenching mechanism was confirmed by lifetime measurements. The thermodynamic parameters such as free energy change (ΔG), enthalpy change (ΔH) and entropy change (ΔS), were calculated by thermodynamic equations. The results showed that Van der Waals interaction or hydrogen bond formation played a major role in the binding of 9-AA with these dyes.
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Affiliation(s)
- C Manivannan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
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190
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Zhao XN, Liu Y, Niu LY, Zhao CP. Spectroscopic studies on the interaction of bovine serum albumin with surfactants and apigenin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 94:357-364. [PMID: 22561754 DOI: 10.1016/j.saa.2012.02.078] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 02/16/2012] [Accepted: 02/22/2012] [Indexed: 05/31/2023]
Abstract
The binding of apigenin (Ap) to bovine serum albumin (BSA) has been studied using the methods of fluorescence spectroscopy and UV-vis absorption spectroscopy. The spectroscopic analysis of the quenching mechanism indicates that the quenching constants are inversely correlated with the temperatures and the quenching process could result from a static interaction. The type of interaction force was discussed and the binding site of Ap was in site I (subdomain IIA) of BSA. The thermodynamic parameters ΔH and ΔS are -42.02kJ mol(-1) and -48.31J mol(-1)K(-1), respectively and the negative ΔG implying that the binding interaction was spontaneous. The distance r between BSA and Ap was calculated according to Förster's theory and the value is 3.44nm. The synchronous and three-dimensional fluorescence spectra show that the binding of Ap to BSA could lead to the changes in the conformation and microenvironment of BSA. At the same time, the effects of ionic surfactants on the interaction of Ap and BSA have also been investigated.
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Affiliation(s)
- Xu-Na Zhao
- Experimental Center, Henan Institute of Science and Technology, Xinxiang 453003, PR China
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191
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Shahabadi N, Maghsudi M, Ahmadipour Z. Study on the interaction of silver(I) complex with bovine serum albumin by spectroscopic techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 92:184-188. [PMID: 22446765 DOI: 10.1016/j.saa.2012.02.071] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/15/2012] [Accepted: 02/17/2012] [Indexed: 05/31/2023]
Abstract
The interaction of silver(I) complex, [Ag (2,9-dimethyl-1,10-phenanthroline)(2)](NO(3))·H(2)O, and bovine serum albumin (BSA) was investigated by spectrophotometry, spectrofluorimetry and circular dichroism (CD) techniques. The experimental results indicated that the quenching mechanism of BSA by the complex was a static procedure. Various binding parameters were evaluated. The negative value of ΔH, negative value of ΔS and the negative value of ΔG indicated that van der Waals force and hydrogen bonding play major roles in the binding of the complex and BSA. Based on Forster's theory of non-radiation energy transfer, the binding distance, r, between the donor (BSA) and acceptor (Ag(I) complex) was evaluated. The results of CD and UV-vis spectroscopy showed that the binding of this complex could bind to BSA and be effectively transported and eliminated in the body.
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Affiliation(s)
- Nahid Shahabadi
- Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran.
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192
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Jiang H, Chen R, Wang H, Pu H. Interaction of cyproheptadine hydrochloride with human serum albumin using spectroscopy and molecular modeling methods. LUMINESCENCE 2012; 28:244-52. [DOI: 10.1002/bio.2374] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2011] [Revised: 03/06/2012] [Accepted: 03/09/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Hua Jiang
- Bio‐engineering Institute, College of Life Science and TechnologyJinan University Guangzhou 510632 China
| | - Rongrong Chen
- Bio‐engineering Institute, College of Life Science and TechnologyJinan University Guangzhou 510632 China
| | - Hongcui Wang
- Bio‐engineering Institute, College of Life Science and TechnologyJinan University Guangzhou 510632 China
| | - Hanlin Pu
- Bio‐engineering Institute, College of Life Science and TechnologyJinan University Guangzhou 510632 China
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193
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Cui F, Hui G, Jiang X, Zhang G. Interaction of 3′-azido-3′-deamino daunorubicin with DNA: Multispectroscopic and molecular modeling. Int J Biol Macromol 2012; 50:1121-6. [DOI: 10.1016/j.ijbiomac.2012.02.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 01/31/2012] [Accepted: 02/07/2012] [Indexed: 11/29/2022]
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194
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Bakkialakshmi S, Chandrakala D. Investigation of the fluorescence quenching of bovine serum albumin by certain substituted uracils. J Mol Liq 2012. [DOI: 10.1016/j.molliq.2012.01.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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195
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Interaction of Human Serum Albumin with Indomethacin: Spectroscopic and Molecular Modeling Studies. J SOLUTION CHEM 2012. [DOI: 10.1007/s10953-012-9809-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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196
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Bakkialakshmi S, Chandrakala D. A spectroscopic investigations of anticancer drugs binding to bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 88:2-9. [PMID: 22226896 DOI: 10.1016/j.saa.2011.10.076] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 10/15/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
The binding of anticancer drugs (i) Uracil (U), (ii) 5-Fluorouracil (5FU) and (iii) 5-Chlorouracil (5ClU), to bovine serum albumin (BSA) at two levels of temperature was studied by the fluorescence of quenching method. UV/Vis, time-resolved fluorescence, Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance ((1)H NMR) and scanning electron microscope (SEM) analyses were also made. Binding constants (K(a)) and binding sites (n) at various levels of temperature were calculated. The obtained binding sites were found to be equal to one for all the three quenchers (U, 5FU and 5ClU) at two different temperature levels. Thermodynamic parameters ΔH, ΔG and ΔS have been calculated and were presented in tables. Change in FTIR absorption intensity shows strong binding of anticancer drugs to BSA. Changes in chemical shifts of NMR and fluorescence lifetimes of the drugs indicate the presence of interaction and binding of BSA to anticancer drugs. (1)H NMR spectra and SEM photographs also conform this binding.
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Affiliation(s)
- S Bakkialakshmi
- Department of Physics, Annamalai University, Annamalai nagar, Tamil Nadu, India.
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197
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Liu F, Wang Y, Lv C, Wang L, Ou J, Wang M, Liu S. Impact of halogen substituents on interactions between 2-phenyl-2,3-dihydroqulinazolin-4(1H)-one derivatives and human serum albumin. Molecules 2012; 17:2000-14. [PMID: 22343405 PMCID: PMC6268991 DOI: 10.3390/molecules17022000] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 01/26/2012] [Accepted: 01/27/2012] [Indexed: 11/16/2022] Open
Abstract
A novel type of 2-(un)substituted phenyl-2,3-dihydroquinazolin-4(1H)-one (DQL) derivatives were designed and synthesized to study the impact of halogen substituents on interactions between DQL and human serum albumin (HSA) by comparison methodology. The interactions between DQL and HSA were studied by fluorescence spectroscopy. The intrinsic fluorescence of human serum albumin was quenched by DQL through a static quenching mechanism. Site marker competitive experiments showed that DQL bound to HSA in site II (subdomain IIIA). The binding constants, the numbers of binding sites and the thermodynamic parameters were measured too. The results indicated that the interactions were spontaneous, mainly through hydrophobic forces, and the substitution by halogen atoms in the benzene ring could increase the interactions between DQL and HSA. Furthermore, the binding affinity was enhanced gradually with the increasing of halogen atomic number.
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Affiliation(s)
| | | | | | | | | | | | - Shangzhong Liu
- Author to whom correspondence should be addressed; ; Tel.: +86-10-6273-1070; Fax: +86-10-6273-1070
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198
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Elliott IG, Kuhl TL, Faller R. A Molecular Dynamics Technique to Extract Forces in Soft Matter Systems Under Compression With Constant Solvent Chemical Potential. J Chem Theory Comput 2012; 8:1072-7. [DOI: 10.1021/ct2005984] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ian G. Elliott
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
| | - Tonya L. Kuhl
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
| | - Roland Faller
- Chemical Engineering and Material Science, University
of California, 3112 Bainer Hall, One Shields Avenue, Davis, California,
United States
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199
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Wang Q, Liu P, Zhou X, Zhang X, Fang T, Liu P, Min X, Li X. Thermodynamic and conformational investigation of the influence of CdTe QDs size on the toxic interaction with BSA. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2011.12.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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200
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Genzer J, Arifuzzaman S, Bhat RR, Efimenko K, Ren CL, Szleifer I. Time dependence of lysozyme adsorption on end-grafted polymer layers of variable grafting density and length. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2122-30. [PMID: 22181708 PMCID: PMC3269559 DOI: 10.1021/la2038747] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A combined experimental and theoretical approach establishes the long-lived nature of protein adsorption on surfaces coated with chemically grafted macromolecules. Specifically, we monitor the time dependence of adsorption of lysozyme on surfaces comprising polymer assemblies made of poly(2-hydroxyethyl methacrylate) brushes grafted onto flat silica surfaces such that they produce patterns featuring orthogonal and gradual variation of the chain length (N) and grafting density (σ). We show that in the kinetically controlled regime, the amount of adsorbed protein scales universally with the product σN, while at equilibrium the amount of adsorbed protein is governed solely by σ. Surprisingly, for moderate concentrations of protein in solution, adsorption takes more than 72 h to reach an equilibrium, or steady state. Our experimental findings are corroborated with predictions using molecular theory that provides further insight into the protein adsorption phenomenon. The theory predicts that the universal behavior observed experimentally should be applicable to polymers in poor and theta solvents and to a limited extent also to good solvent conditions. Our combined experimental and theoretical findings reveal that protein adsorption is a long-lived phenomenon, much longer than generally assumed. Our studies confirm the previously predicted important differences in behavior for the kinetic versus thermodynamic control of protein adsorption.
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Affiliation(s)
- Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Shafi Arifuzzaman
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Rajendra R. Bhat
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Kirill Efimenko
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina, USA
| | - Chun-lai Ren
- National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P.R. China
| | - Igal Szleifer
- Department of Biomedical Engineering and Chemistry of Life Processes Institute, Northwestern University, Evanston, Illinois, USA
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