1
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Jalan A, Sangeet S, Pradhan AK, Moyon NS. Exploring the interaction of a potent anti-cancer drug Selumetinib with bovine serum albumin: Spectral and computational attributes. J Mol Recognit 2024:e3084. [PMID: 38596890 DOI: 10.1002/jmr.3084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 03/05/2024] [Accepted: 03/22/2024] [Indexed: 04/11/2024]
Abstract
The binding of drugs to plasma proteins determines its fate within the physiological system, hence profound understanding of its interaction within the bloodstream is important to understand its pharmacodynamics and pharmacokinetics and thereby its therapeutic potential. In this regard, our work delineates the mechanism of interaction of Selumetinib (SEL), a potent anti-cancer drug showing excellent effect against multiple solid tumors, with plasma protein bovine serum albumin (BSA), using methods such as absorption, steady-state fluorescence, time-resolved, fluorescence resonance energy transfer, Fourier transform infrared spectra (FTIR), circular dichroism (CD), synchronous and 3D-fluorescence, salt fluorescence, molecular docking and molecular dynamic simulations. The BSA fluorescence intensity was quenched with increasing concentration of SEL which indicates interactions of SEL with BSA. Stern-Volmer quenching analysis and lifetime studies indicate the involvement of dynamic quenching. However, some contributions from the static quenching mechanism could not be ruled out unambiguously. The association constant was found to be 5.34 × 105 M-1 and it has a single binding site. The Förster distance (r) indicated probable energy transmission between the BSA and SEL. The positive entropy changes and enthalpy change indicate that the main interacting forces are hydrophobic forces, also evidenced by the results of molecular modeling studies. Conformation change in protein framework was revealed from FTIR, synchronous and 3D fluorescence and CD studies. Competitive binding experiments as well as docking studies suggest that SEL attaches itself to site I (subdomain IIA) of BSA where warfarin binds. Molecular dynamic simulations indicate the stability of the SEL-BSA complex. The association energy between BSA and SEL is affected in the presence of different metals differently.
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Affiliation(s)
- Ankita Jalan
- Department of Chemistry, National Institute of Technology Silchar, Silchar, India
| | - Satyam Sangeet
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - Amit Kumar Pradhan
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, India
| | - N Shaemningwar Moyon
- Department of Chemistry, National Institute of Technology Silchar, Silchar, India
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2
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Neelofar K, Haneef J, Ahmad J, Alam K, Zaidi R. Anti-glycating and anti-cytotoxic effect of silibinin on albumin at early glycation: A physiochemical study. Arch Biochem Biophys 2024; 753:109916. [PMID: 38296016 DOI: 10.1016/j.abb.2024.109916] [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: 12/06/2023] [Revised: 01/27/2024] [Accepted: 01/28/2024] [Indexed: 02/26/2024]
Abstract
During persistent hyperglycaemia, albumin, one of the major blood proteins, can undergo fast glycation. It can be expected that timely inhibition of protein glycation might be add quality years to diabetic patients' life. Therefore, this study was designed to analyse the role of silibinin to reduced or delay amadori adduct formation at early glycation and its beneficial effect to improve the glycated albumin structure and conformation. We also analysed cytotoxic effect of amadori-albumin in the presence of silibinin on murine macrophage cell line RAW cells by MTT (3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide) assay. Formation of early glycated product (furosine) in all samples was confirmed by LCMS. Albumin incubated with glucose only showed presence of furosine like structure. Albumin treated with silibinin in the presence of glucose did not show such furosine like peak. This LCMS result showed the silibinin play a protective role in the formation of early glycated product. HMF contents were also reduced in the presence of silibinin, when albumin was incubated with increasing concentrations of silibinin (100 and 200 μM) in the presence of glucose. ANS binding fluorescence decrease by increasing silibinin concentrations with amadori-albumin. SDS-PAGE was also showed that no significant difference in the band mobility of albumin treated with silibinin as compared to native albumin. The secondary conformational alteration in amadori-albumin due to silibinin were confirmed by FTIR. This spectrum showed slight shift in amide I and Amide II band in albumin co-incubated with glucose and silibinin as compared to albumin incubated with glucose only. We further discussed about cytotoxic effect of amadori albumin and its prevention by silibinin. MTT assay results demonstrated that amadori-albumin showed cytotoxic effect on RAW cells but silibinin showed protective role and increased the cell viability. Moreover, the results showed that silibinin has anti-glycating potential and playing a role to prevent the formation of Amadori-albumin in-vitro. Silibinin possesses strong anti-glycating capacity and can improve albumin structure and function at early stage. It might be useful in delaying the progression of diabetes mellitus and its secondary complications at early stage.
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Affiliation(s)
- Km Neelofar
- Department of Biochemistry, School of Chemicals and life Sciences, Jamia Hamdard University, New Delhi, India.
| | - Jamshed Haneef
- Department of Pharmaceutical Chemistry, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
| | - Jamal Ahmad
- Formerly at Rajiv Gandhi Centre for Diabetes and Endocrinology, J. N. Medical College, Faculty of Medicine, Aligarh Muslim University, Aligarh, India
| | - Khursheed Alam
- Department of Biochemistry, J. N. Medical College, Aligarh Muslim University, Aligarh, India
| | - Rana Zaidi
- Department of Biochemistry, School of Chemicals and life Sciences, Jamia Hamdard University, New Delhi, India
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3
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Ye S, Zhong K, Huang Y, Zhang G, Sun C, Jiang J. Artificial Intelligence-based Amide-II Infrared Spectroscopy Simulation for Monitoring Protein Hydrogen Bonding Dynamics. J Am Chem Soc 2024; 146:2663-2672. [PMID: 38240637 DOI: 10.1021/jacs.3c12258] [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: 02/01/2024]
Abstract
The structurally sensitive amide II infrared (IR) bands of proteins provide valuable information about the hydrogen bonding of protein secondary structures, which is crucial for understanding protein dynamics and associated functions. However, deciphering protein structures from experimental amide II spectra relies on time-consuming quantum chemical calculations on tens of thousands of representative configurations in solvent water. Currently, the accurate simulation of amide II spectra for whole proteins remains a challenge. Here, we present a machine learning (ML)-based protocol designed to efficiently simulate the amide II IR spectra of various proteins with an accuracy comparable to experimental results. This protocol stands out as a cost-effective and efficient alternative for studying protein dynamics, including the identification of secondary structures and monitoring the dynamics of protein hydrogen bonding under different pH conditions and during protein folding process. Our method provides a valuable tool in the field of protein research, focusing on the study of dynamic properties of proteins, especially those related to hydrogen bonding, using amide II IR spectroscopy.
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Affiliation(s)
- Sheng Ye
- School of Artificial Intelligence, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Kai Zhong
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, Groningen 9747AG, Netherlands
| | - Yan Huang
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Guozhen Zhang
- Hefei National Research Center of Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
| | - Changyin Sun
- School of Artificial Intelligence, Anhui University, Hefei, Anhui 230601, People's Republic of China
| | - Jun Jiang
- Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
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4
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Lincon A, Mohapatra P, Das S, DasGupta S. Probing silver nanoparticle mediated mitigation of UV-photolysis in proteins by electrical impedance analysis. Int J Biol Macromol 2024; 256:128271. [PMID: 38000604 DOI: 10.1016/j.ijbiomac.2023.128271] [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: 08/30/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
The dynamic equilibrium between an array of molecular forces precisely organizes the native structure of the protein. The charge on the protein, an interconnected network continuum, is crucial in determining its secondary and tertiary structure. The photolysis of the protein by ultraviolet (UV) light occurs by generating reactive oxygen intermediates from the interaction of matter and light. Herein, we have investigated the photolysis of the protein and its prevention by the pre-treatment with silver nanoparticle (AgNP) using non-faradaic electrical impedance spectroscopy (Nf-EIS). Five microliters of protein solution are used to measure its impedimetric parameters via Nf-EIS. The photoionization process sparks off an altered surface charge continuum of the protein molecules in tandem with the genesis of solvated electrons and protons, spurring an upward shift in conductivity. The AgNP pre-treatment has reduced the damaging effects of the UV radiation, which is reflected as lesser conductivity in contrast to the photolyzed protein solution. Raman Spectroscopy and circular dichroism tests affirm the trend of Nf-EIS results. These results show that Nf-EIS can evaluate protein structure analysis utilized in quality assurance and toxicity analysis for biologics.
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Affiliation(s)
- Abhijit Lincon
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, India
| | - Pratyusa Mohapatra
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, India
| | - Soumen Das
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, India
| | - Sunando DasGupta
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, India.
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5
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Agrillo B, Porritiello A, Gratino L, Balestrieri M, Proroga YT, Mancusi A, Cozzi L, Vicenza T, Dardano P, Miranda B, Escribá PV, Gogliettino M, Palmieri G. Antimicrobial activity, membrane interaction and structural features of short arginine-rich antimicrobial peptides. Front Microbiol 2023; 14:1244325. [PMID: 37869668 PMCID: PMC10585156 DOI: 10.3389/fmicb.2023.1244325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023] Open
Abstract
Antimicrobial activity of many AMPs can be improved by lysine-to-arginine substitution due to a more favourable interaction of arginine guanidinium moiety with bacterial membranes. In a previous work, the structural and functional characterization of an amphipathic antimicrobial peptide named RiLK1, including lysine and arginine as the positively charged amino acids in its sequence, was reported. Specifically, RiLK1 retained its β-sheet structure under a wide range of environmental conditions (temperature, pH, and ionic strength), and exhibited bactericidal activity against Gram-positive and Gram-negative bacteria and fungal pathogens with no evidence of toxicity on mammalian cells. To further elucidate the influence of a lysine-to-arginine replacement on RiLK1 conformational properties, antimicrobial activity and peptide-liposome interaction, a new RiLK1-derivative, named RiLK3, in which the lysine is replaced with an arginine residue, was projected and characterised in comparison with its parental compound. The results evidenced that lysine-to-arginine mutation not only did not assure an improvement in the antimicrobial potency of RiLK1 in terms of bactericidal, virucidal and fungicidal activities, but rather it was completely abolished against the hepatitis A virus. Therefore, RiLK1 exhibited a wide range of antimicrobial activity like other cationic peptides, although the exact mechanisms of action are not completely understood. Moreover, tryptophan fluorescence measurements confirmed that RiLK3 bound to negatively charged lipid vesicles with an affinity lower than that of RiLK1, although no substantial differences from the structural and self-assembled point of view were evidenced. Therefore, our findings imply that antimicrobial efficacy and selectivity are affected by several complex and interrelated factors related to substitution of lysine with arginine, such as their relative proportion and position. In this context, this study could provide a better rationalisation for the optimization of antimicrobial peptide sequences, paving the way for the development of novel AMPs with broad applications.
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Affiliation(s)
| | - Alessandra Porritiello
- National Research Council (IBBR-CNR), Institute of Biosciences and Bioresources, Napoli, Italy
| | - Lorena Gratino
- National Research Council (IBBR-CNR), Institute of Biosciences and Bioresources, Napoli, Italy
| | - Marco Balestrieri
- National Research Council (IBBR-CNR), Institute of Biosciences and Bioresources, Napoli, Italy
| | - Yolande Therese Proroga
- Department of Food Microbiology, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Andrea Mancusi
- Department of Food Microbiology, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Italy
| | - Loredana Cozzi
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - Teresa Vicenza
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Rome, Italy
| | - Principia Dardano
- National Research Council (ISASI-CNR), Institute of Applied Sciences and Intelligent Systems, Napoli, Italy
| | - Bruno Miranda
- National Research Council (ISASI-CNR), Institute of Applied Sciences and Intelligent Systems, Napoli, Italy
| | - Pablo V. Escribá
- Laboratory of Molecular Cell Biomedicine, University of the Balearic Islands, Palma, Spain
- Laminar Pharmaceuticals, Palma, Spain
| | - Marta Gogliettino
- National Research Council (IBBR-CNR), Institute of Biosciences and Bioresources, Napoli, Italy
| | - Gianna Palmieri
- National Research Council (IBBR-CNR), Institute of Biosciences and Bioresources, Napoli, Italy
- Materias S.R.L., Naples, Italy
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6
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Lincon A, Das S, DasGupta S. Capturing protein denaturation using electrical impedance technique. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Deciphering the mechanism of interaction of an ester-functionalized cationic gemini surfactant with bovine serum albumin: A biophysical and molecular modeling study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128944] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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da Silva ARC, Calazans Soares LR, Lima ÁS, Soares CMF, Lucena de Souza R. Strategies to reuse of biocatalysts in the hydrolysis and esterification reactions from licuri (Syagrus coronata (Mart.) Becc.) oil. ChemCatChem 2022. [DOI: 10.1002/cctc.202200448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alan R. C. da Silva
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | | | - Álvaro S. Lima
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | - Cleide M. F. Soares
- Tiradentes University: Universidade Tiradentes Engenharia de Processos BRAZIL
| | - Ranyere Lucena de Souza
- Tiradentes University: Universidade Tiradentes Programa de Pós-Graduação em Engenharia de Processos Av. Murilo Dantas, N 300 49032490 Aracaju BRAZIL
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9
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Zhou Y, Zeng B, Zhou R, Li X, Zhang G. One-Pot Synthesis of Multiple Stimuli-Responsive Magnetic Nanomaterials Based on the Biomineralization of Elastin-like Polypeptides. ACS OMEGA 2021; 6:27946-27954. [PMID: 34722994 PMCID: PMC8552364 DOI: 10.1021/acsomega.1c03821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Synthesis of multiple stimuli-responsive magnetic nanomaterials in a green way remains as a big challenge currently. Herein, temperature-responsive elastin-like polypeptides (ELPs) were designed to involve in the biomimetic mineralization and successfully prepared magnetic nanoparticles (MNPs) (named ELPs-MNPs) with multiple responsiveness (temperature, magnetic, and biomimetic silicification responsiveness) in one pot. ELPs-MNPs were identified as cubic nanomaterials with an average size of about 32 nm and in line with the classic ferromagnetic behavior. Interestingly, ELPs-MNPs show clearly lower critical solution temperature phase behavior with a transition temperature of 36 °C. Moreover, ELPs-MNPs can spontaneously trigger the biosilicification of tetramethyl orthosilicate (TMOS) to entrap themselves into silicon oxide as proved by the Fourier transform infrared spectra (FTIR) and elemental mapping of transmission electron microscopy (TEM), with an average size of about 62 nm. The possible role of ELPs in the biomimetic preparation of the multiple stimuli-responsive MNPs was also addressed. The proposed novel and simple one-pot strategy to synthesize multifunctional nanomaterials with higher effectiveness is the first report for preparing MNPs with multiple stimuli response. This strategy conforms to the concept of green chemistry and will pave a new way for the design of smart biomaterials, which may have great potentials for different fields.
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10
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Chen Y, Mutukuri TT, Wilson NE, Zhou QT. Pharmaceutical protein solids: Drying technology, solid-state characterization and stability. Adv Drug Deliv Rev 2021; 172:211-233. [PMID: 33705880 PMCID: PMC8107147 DOI: 10.1016/j.addr.2021.02.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/18/2021] [Accepted: 02/22/2021] [Indexed: 01/30/2023]
Abstract
Despite the boom in biologics over the past decade, the intrinsic instability of these large molecules poses significant challenges to formulation development. Almost half of all pharmaceutical protein products are formulated in the solid form to preserve protein native structure and extend product shelf-life. In this review, both traditional and emerging drying techniques for producing protein solids will be discussed. During the drying process, various stresses can impact the stability of protein solids. However, understanding the impact of stress on protein product quality can be challenging due to the lack of reliable characterization techniques for biological solids. Both conventional and advanced characterization techniques are discussed including differential scanning calorimetry (DSC), solid-state Fourier transform infrared spectrometry (ssFTIR), solid-state fluorescence spectrometry, solid-state hydrogen deuterium exchange (ssHDX), solid-state nuclear magnetic resonance (ssNMR) and solid-state photolytic labeling (ssPL). Advanced characterization tools may offer mechanistic investigations into local structural changes and interactions at higher resolutions. The continuous exploration of new drying techniques, as well as a better understanding of the effects caused by different drying techniques in solid state, would advance the formulation development of biological products with superior quality.
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Affiliation(s)
- Yuan Chen
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Tarun Tejasvi Mutukuri
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Nathan E Wilson
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, IN 47907, USA.
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11
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A selected bacterial strain for the self-healing process in cementitious specimens without cell immobilization steps. Bioprocess Biosyst Eng 2020; 44:195-208. [PMID: 32892287 DOI: 10.1007/s00449-020-02435-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 08/25/2020] [Indexed: 10/23/2022]
Abstract
The use of microorganisms capable of mediating the bioprecipitation process can be an important application in the self-healing processes of cement specimens. Thus, the present study identified and evaluated five Bacillus strains for potential application in the protocol of self-healing via bioprecipitation. Cell growth, enzyme production, and kinetic parameters conditions were evaluated during the fermentation process. Based on the analysis of 16S rDNA in conjunction with biochemical testing, results demonstrate that the strains are either Bacillus cereus or Bacillus thuringiensis. Strategically it was found that the addition of glycerol to fermentative medium was essential to increase the bacterial concentration (≈ 4.2 × 107 cells mL-1) and production of the enzyme urease (≈ 3.623,2 U.mL-1). The addition of this medium after 40 days of fermentation promoted the self-healing of cracks and increased compressive strength in ≈ 14.2% of the cementitious specimens; therefore, increasing the sustainability and engineering properties of cement-based materials.
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12
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Brandão LMDS, Barbosa MS, Souza RL, Pereira MM, Lima ÁS, Soares CMF. Lipase activation by molecular bioimprinting: The role of interactions between fatty acids and enzyme active site. Biotechnol Prog 2020; 37:e3064. [PMID: 32776684 DOI: 10.1002/btpr.3064] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 07/21/2020] [Accepted: 08/07/2020] [Indexed: 01/06/2023]
Abstract
Bioimprinting is an easy, sustainable and low-cost technique that promotes a printing of potential substrates on enzyme structure, inducing a more selective and stable conformation. Bioimprinting promotes conformational changes in enzymes, resulting in better catalytic performance. In this work, the effect of bioimprinting of Burkholderia cepacia lipase (BCL) and porcine pancreatic extracts (PPE) with four different fatty acids (lauric acid (C12:0), myristic acid (C14:0), palmitic acid (C16:0), and stearic acid (C18:0)) was investigated. The results demonstrated that the better bioimprinting effect was in BCL with lauric acid in esterification reaction, promoting BCL activation in which relative enzyme activity was 70 times greater than nonimprinted BCL. Bioimprinting results were influenced by the carbon chain length of fatty acids imprinted in the BCL, in which the effects were weaker with the chain increase. Molecular docking was performed to better understand the bioimprinting method. The results of these simulations showed that indeed all fatty acids were imprinted in the active site of BCL. However, lauric acid presented the highest imprinting preference in the active site of BCL, resulting in the highest relative activity. Furthermore, Fourier transform infrared (FTIR) analysis confirmed important variations in secondary structure of bioimprinting BCL with lauric acid, in which there was a reduction in the α-helix content and an increase in the β-sheet content that facilitated substrate access to the active site of BCL and led higher rigidity, resulting in high activity. Bioimprinted BCL with lauric acid showed excellent operational stability in esterification reaction, maintaining its original relative activity after five successive cycles. Thus, the results show that bioimprinting of BCL with lauric acid is a successful strategy due to its high catalytic activity and reusability.
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Affiliation(s)
| | | | - Ranyere L Souza
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
| | - Matheus M Pereira
- CICECO - Instituto de Materiais de Aveiro, Departamento de Química, Universidade de Aveiro, Aveiro, Portugal
| | - Álvaro S Lima
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
| | - Cleide M F Soares
- Universidade Tiradentes, Aracaju, Sergipe, Brazil.,Instituto de Tecnologia e Pesquisa, Aracaju, Sergipe, Brazil
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13
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Alves NR, Pereira MM, Giordano RLC, Tardioli PW, Lima ÁS, Soares CMF, Souza RL. Design for preparation of more active cross-linked enzyme aggregates of Burkholderia cepacia lipase using palm fiber residue. Bioprocess Biosyst Eng 2020; 44:57-66. [PMID: 32767112 DOI: 10.1007/s00449-020-02419-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/29/2020] [Indexed: 01/18/2023]
Abstract
A new design of cross-linked enzyme aggregates (CLEAs) of Burkholderia cepacia lipase (BCL) based mainly on the use of lignocellulosic residue of palm fiber as an additive was proposed. Different parameters for the preparation of active CLEAs in the hydrolysis of olive oil, such as precipitation agents, crosslinking agent concentration, additives, and coating agents were investigated. The highest activity yield (121.1 ± 0.1%) and volumetric activity (1578.1 ± 2.5 U/mL) were achieved for CLEAs prepared using the combination of a coating step with Triton® X-100 and polyethyleneimine plus the use of palm fiber as an additive. The variations of the secondary structures of BCL-CLEAs were analyzed by second-derivative infrared spectra, mainly indicating a reduction of the α-helix structure, which was responsible for the lipase activation in the supramolecular structure of the CLEAs. Thus, these results provided evidence of an innovative design of BCL-CLEAs as a sustainable and biocompatible opportunity for biotechnology applications.
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Affiliation(s)
- Nanda R Alves
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil
| | - Matheus M Pereira
- Chemistry Department, CICECO, University of Aveiro, Campus Universitário de Santiago Aveiro, 3810-193, Aveiro, Portugal
| | - Raquel L C Giordano
- Programa de Pós-Graduação Em Engenharia Química (PPG-EQ), Departamento de Engenharia Química, Universidade Federal de São Carlos (DEQ/UFSCar), Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Paulo W Tardioli
- Programa de Pós-Graduação Em Engenharia Química (PPG-EQ), Departamento de Engenharia Química, Universidade Federal de São Carlos (DEQ/UFSCar), Rodovia Washington Luís, Km 235, São Carlos, SP, 13565-905, Brazil
| | - Álvaro S Lima
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil.,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil
| | - Cleide M F Soares
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil.,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil
| | - Ranyere L Souza
- UNIT, Universidade Tiradentes, Av. Murilo Dantas, 300, Farolândia, Aracaju, SE, Brazil. .,ITP, Instituto de Tecnologia E Pesquisa, Av. Murilo Dantas, 300, ITP, Farolândia, Aracaju, SE, Brazil.
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14
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Distler T, McDonald K, Heid S, Karakaya E, Detsch R, Boccaccini AR. Ionically and Enzymatically Dual Cross-Linked Oxidized Alginate Gelatin Hydrogels with Tunable Stiffness and Degradation Behavior for Tissue Engineering. ACS Biomater Sci Eng 2020; 6:3899-3914. [PMID: 33463325 DOI: 10.1021/acsbiomaterials.0c00677] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Hydrogels that allow for the successful long-term in vitro culture of cell-biomaterial systems to enable the maturation of tissue engineering constructs are highly relevant in regenerative medicine. Naturally derived polysaccharide-based hydrogels promise to be one material group with enough versatility and chemical functionalization capability to tackle the challenges associated with long-term cell culture. We report a marine derived oxidized alginate, alginate dialdehyde (ADA), and gelatin (GEL) system (ADA-GEL), which is cross-linked via ionic (Ca2+) and enzymatic (microbial transglutaminase, mTG) interaction to form dually cross-linked hydrogels. The cross-linking approach allowed us to tailor the stiffness of the hydrogels in a wide range (from <5 to 120 kPa), without altering the initial ADA and GEL hydrogel chemistry. It was possible to control the degradation behavior of the hydrogels to be stable for up to 30 days of incubation. Increasing concentrations of mTG cross-linker solutions allowed us to tune the degradation behavior of the ADA-GEL hydrogels from fast (<7 days) to moderate (14 days) and slow (>30 days) degradation kinetics. The cytocompatibility of mTG cross-linked ADA-GEL was assessed using NIH-3T3 fibroblasts and ATDC-5 mouse teratocarcinoma cells. Both cell types showed highly increased cellular attachment on mTG cross-linked ADA-GEL in comparison to Ca2+ cross-linked hydrogels. In addition, ATDC-5 cells showed a higher proliferation on mTG cross-linked ADA-GEL hydrogels in comparison to tissue culture polystyrene control substrates. Further, the attachment of human umbilical vein endothelial cells (HUVEC) on ADA-GEL (+) mTG was confirmed, proving the suitability of mTG+Ca2+ cross-linked ADA-GEL for several cell types. Summarizing, a promising platform to control the properties of ADA-GEL hydrogels is presented, with the potential to be applied in long-term cell culture investigations such as cartilage, bone, and blood-vessel engineering, as well as for biofabrication.
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Affiliation(s)
- Thomas Distler
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Kilian McDonald
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Susanne Heid
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Emine Karakaya
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Rainer Detsch
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
| | - Aldo R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
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15
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Kaya Özsan AG, Öner AF. A new oligosaccharide-filgrastim conjugate prepared by enzymatic method: Preparation and physicochemical characterization. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2019.101368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Barbosa MS, Freire CCC, Souza RL, Cabrera‐Padilla RY, Pereira MM, Freire MG, Lima ÁS, Soares CMF. Effects of phosphonium‐based ionic liquids on the lipase activity evaluated by experimental results and molecular docking. Biotechnol Prog 2019; 35:e2816. [DOI: 10.1002/btpr.2816] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 03/19/2019] [Accepted: 03/27/2019] [Indexed: 12/11/2022]
Affiliation(s)
| | | | - Ranyere L. Souza
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Rebeca Y. Cabrera‐Padilla
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Matheus M. Pereira
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Mara G. Freire
- Departamento de QuímicaUniversidade de Aveiro, CICECO – Instituto de Materiais de Aveiro Aveiro Portugal
| | - Álvaro S. Lima
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
| | - Cleide M. F. Soares
- Universidade Tiradentes Aracaju Sergipe Brazil
- Instituto de Tecnologia e Pesquisa Aracaju Sergipe Brazil
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17
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Bagoji AM, Buddanavar AT, Gokavi NM, Nandibewoor ST. Characterization of the binding and conformational changes of bovine serum albumin upon interaction with antihypertensive olmesartan medoxomil. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Mechanistic investigation on binding interaction of konjac glucomannan with Zanthoxylum armatum DC. seed glutelin in solution. Int J Biol Macromol 2018; 123:308-313. [PMID: 30445073 DOI: 10.1016/j.ijbiomac.2018.11.094] [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: 08/22/2018] [Revised: 11/12/2018] [Accepted: 11/12/2018] [Indexed: 11/20/2022]
Abstract
Interaction between konjac glucomannan (KGM) and Zanthoxylum armatum DC. seed glutelin (ZSG) was believed to influence the conformational and physicochemical properties of ZSG and impact the texture and shelf-life of food. We investigated changes in fluorescence, ultraviolet-visible (UV-Vis) and fourier transform infrared (FTIR) spectroscopies to explore the interaction of ZSG and KGM. The Stern-Volmer quenching constant (KSV) at three temperatures was evaluated in order to determine the quenching mechanism. The results showed that KGM quenches the fluorescence intensity of ZSG through a static quenching process. Thermodynamic parameters at different temperatures demonstrated that the interaction between ZSG and KGM was mainly favored by van der Waals forces and hydrogen bonding forces, and the binding process was spontaneous and exothermic. The fluorescence spectroscopy, UV-Vis absorption spectroscopy and FTIR spectroscopy data revealed the conformational changes of ZSG upon its interaction with KGM. According to the obtained results, the ZSG-KGM complex was formed.
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19
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Yue Y, Wang Z, Wang Z, Zhang Y, Liu J. A comparative study of binding properties of different coumarin-based compounds with human serum albumin. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.05.060] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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20
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Fernández-Sainz J, Pacheco-Liñán PJ, Granadino-Roldán JM, Bravo I, Garzón A, Rubio-Martínez J, Albaladejo J. Binding of the anticancer drug BI-2536 to human serum albumin. A spectroscopic and theoretical study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 172:77-87. [PMID: 28531794 DOI: 10.1016/j.jphotobiol.2017.05.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/03/2017] [Accepted: 05/11/2017] [Indexed: 01/30/2023]
Abstract
BI-2536 is a potent Polo-like kinase inhibitor which induces apoptosis in diverse human cancer cell lines. The binding affinity of BI-2536 for human serum albumin (HSA) protein may define its pharmacokinetic and pharmacodynamic profile. We have studied the binding of BI-2536 to HSA by means of different spectroscopic techniques and docking calculations. We have experimentally observed that the affinity of BI-2536 for HSA is higher than that of other common HSA binding drugs. Therefore, it can be postulated that the drug dose should be increased to achieve a certain concentration of free drug in plasma, although BI-2536 could also reach tumour tissues by uptaking HSA/BI-2536 complex. Only a single binding site on HSA has been observed for BI-2536 which seems to correspond to the subdomain IIA pocket. The formation of the HSA/BI-2536 complex is a spontaneous and entropy-driven process that does not cause a significant change of the secondary structure of the protein. Its endothermic character could be related to proton release. Thermodynamic analysis showed that the main protein-drug interactions are of the van der Waals type although the presence of amide and ether groups in BI-2536 could also allow H-bonding with some residues in the subdomain IIA pocket.
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Affiliation(s)
- Jesús Fernández-Sainz
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los Estudiantes, s/n, 02071 Albacete, Spain
| | - Pedro J Pacheco-Liñán
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los Estudiantes, s/n, 02071 Albacete, Spain
| | - José M Granadino-Roldán
- Departamento de Química Física y Analítica, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus "Las Lagunillas" s/n, 23071 Jaén, Spain
| | - Iván Bravo
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los Estudiantes, s/n, 02071 Albacete, Spain
| | - Andrés Garzón
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los Estudiantes, s/n, 02071 Albacete, Spain.
| | - Jaime Rubio-Martínez
- Departament de Química Física, Universitat de Barcelona (UB), Institut de Recerca en Quimica Teorica i Computacional (IQTCUB), Martí iFranqués 1, 08028 Barcelona, Spain
| | - José Albaladejo
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José Cela, 10, 13071 Ciudad Real, Spain
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21
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Mondal D, Sharma M, Quental MV, Tavares APM, Prasad K, Freire MG. Suitability of bio-based ionic liquids for the extraction and purification of IgG antibodies. GREEN CHEMISTRY : AN INTERNATIONAL JOURNAL AND GREEN CHEMISTRY RESOURCE : GC 2016; 18:6071-6081. [PMID: 28255278 PMCID: PMC5330477 DOI: 10.1039/c6gc01482h] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
In the past decade, remarkable advances in the production and use of antibodies as therapeutic drugs and in research/diagnostic fields have led to their recognition as value-added proteins. These biopharmaceuticals have become increasingly important, reinforcing the current demand for the development of more benign, scalable and cost-effective techniques for their purification. Typical polymer-polymer and polymer-salt aqueous biphasic systems (ABS) have been studied for such a goal; yet, the limited polarity range of the coexisting phases and their low selective nature still are their major drawbacks. To overcome this limitation, in this work, ABS formed by bio-based ionic liquids (ILs) and biocompatible polymers were investigated. Bio-based ILs composed of ions derived from natural sources, namely composed of the cholinium cation and anions derived from plants natural acids, have been designed, synthesized, characterized and used for the creation of ABS with polypropyleneglycol (PPG 400). The respective ternary phase diagrams were initially determined at 25 °C to infer on mixture compositions required to form aqueous systems of two phases, further applied in the extraction of pure immunoglobulin G (IgG) to identify the most promising bio-based ILs, and finally employed in the purification of IgG from complex and real matrices of rabbit serum. Remarkably, the complete extraction of IgG to the IL-rich phase was achieved in a single-step. With pure IgG a recovery yield of 100% was obtained, while with rabbit serum this value slightly decreased to ca. 85%. Nevertheless, a 58% enhancement in the IgG purity was achieved when compared with its purity in serum samples. The stability of IgG before and after extraction was also evaluated by size exclusion high-performance liquid chromatography (SE-HPLC), sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) and Fourier transform infrared spectroscopy (FTIR). In most ABS formed by bio-based ILs, IgG retained its native structure, without degradation or denaturation effects, supporting thus their potential as remarkable platforms for the purification of high-cost biopharmaceuticals.
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Affiliation(s)
- Dibyendu Mondal
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mukesh Sharma
- Natural Product and Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
- AcSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Maria V. Quental
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Ana P. M. Tavares
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Kamalesh Prasad
- Natural Product and Green Chemistry Division, CSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
- AcSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
| | - Mara G. Freire
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
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22
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Ariga GG, Naik PN, Nandibewoor ST, Chimatadar SA. Quenching of fluorescence by meclizine, a probe study for structural and conformational changes in human serum albumin. J Biomol Struct Dyn 2016; 35:3161-3175. [DOI: 10.1080/07391102.2016.1245159] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Girish G. Ariga
- Department of Studies in Chemistry, Karnatak University, Dharwad 580003, India
| | - Praveen N. Naik
- Department of Studies in Chemistry, Karnatak University, Dharwad 580003, India
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23
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Dąbrowska A, Nyk M, Worch R, Grzyb J. Hydrophilic colloidal quantum dots with long peptide chain coats. Colloids Surf B Biointerfaces 2016; 145:662-670. [DOI: 10.1016/j.colsurfb.2016.05.081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 05/02/2016] [Accepted: 05/27/2016] [Indexed: 12/01/2022]
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24
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Neelofar KM, Ahmad J, Arif Z, Alam K. Elucidating the impact of glucosylation on human serum albumin: A multi-technique approach. Int J Biol Macromol 2016; 92:881-891. [PMID: 27492562 DOI: 10.1016/j.ijbiomac.2016.07.104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 07/28/2016] [Accepted: 07/30/2016] [Indexed: 11/16/2022]
Abstract
Early glycation products as well as advance glycation end products are involved in pathogenesis of diabetes. Most of studies carried out on AGEs and their possible role in assessing diabetes complications, whereas only a few were focused to highlight the role of Amadori products. In this study, an attempt has been made to investigate a structural and immunological characterizations of Amadori-albumin upon early glucosylation because albumin undergoes fast glycation under hyperglycaemic condition. Amadori-albumin formation was determined by NBT assay and Amadori adducts in glycated samples were confirmed by LC-MS. Structural alterations in Amadori-albumin were characterized by loss in fluorescence intensity, loss in secondary and tertiary structures, exposure of hydrophobic patches, shifting in Amide bands and increment in hydrodynamic radius. Further, presence to autoantibodies against Amadori-albumin in diabetes patients were confirmed by direct binding ELISA and inhibition ELISA. Immunological studies results showed that autoantibodies present in diabetic patients with and without chronic kidney disease (CKD) showed significant binding with Amadori-albumin in comparison to the native protein. Anti Amadori-albumin antibodies predominantly present in CKD patients compare to without CKD patients. Band shift assay results showed true interaction between Amadori-albumin and autoantibodies present in CKD patients. Glucosylation results showed structural alterations in Amadori-albumin and hence generation of neo-epitopes in HSA molecule. Such modifications rendering the protein highly immunogenic that may be recognized as foreign molecule by immune cells and induced autoantibodies in diabetic patients. These finding signify the role of Amadori-albumin in kidney dysfunction in diabetes and raised level of autoantibodies may be used as biomarker for progression of CKD.
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Affiliation(s)
- K M Neelofar
- Rajiv Gandhi Centre for Diabetes and Endocrinology, Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Jamal Ahmad
- Rajiv Gandhi Centre for Diabetes and Endocrinology, Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India.
| | - Zarina Arif
- Department of Biochemistry Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India
| | - Khursheed Alam
- Department of Biochemistry Faculty of Medicine, J.N. Medical College, Aligarh Muslim University, Aligarh 202002, India
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25
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Molecular insight into the Grandivitin- matrix metalloproteinase 9 interactions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:493-499. [PMID: 27454459 DOI: 10.1016/j.jphotobiol.2016.07.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 07/16/2016] [Indexed: 11/23/2022]
Abstract
Grandivitin (GRA), a natural coumarin, can inhibit Matrix metalloproteinase 9 (MMP9). Binding characteristics are therefore of interest for pharmacodynamics of GRA and coumarin derivatives. A combination of spectroscopic methods and molecular modeling techniques was used to characterize interaction of GRA with MMP9. Fluorescence spectroscopy showed that GRA could quench the MMP9 fluorescence spectra. Changes in the UV-Vis and FT-IR spectra were observed upon ligand binding along with a significant degree of tryptophan fluorescence quenching on complex formation. Fluorescence studies showed that GRA has an ability to quench the intrinsic fluorescence of MMP9. Molecular modeling analysis showed that GRA to be bound in the large hydrophobic cavity of MMP9. Further investigation of the binding site of GRA within the MMP9 molecule suggested that hydrophobic contacts, hydrogen bond formation and electrostatic interactions account for the binding of GRA. According molecular dynamics (MD) simulation results the ligand can interact with the protein, with affecting the secondary structure of MMP9 and with a modification of its tertiary structure. The biological significance of this work is evident because MMP9 serves as a potential target protein for anticancer agents. The binding study of GRA with MMP9 is of great importance in pharmacy, pharmacology and biochemistry. This work can provide some key data to clinical research and supply the theoretical basis for the new drug candidate designing.
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26
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Neelofar K, Arif Z, Alam K, Ahmad J. Hyperglycemia induced structural and functional changes in human serum albumin of diabetic patients: a physico-chemical study. MOLECULAR BIOSYSTEMS 2016; 12:2481-9. [DOI: 10.1039/c6mb00324a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Structural and functional changes in glycated-HSA, isolated from diabetic patients, suggests it has a significant role in diabetes progression and kidney dysfunction.
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Affiliation(s)
- Km Neelofar
- Rajiv Gandhi Centre for Diabetes and Endocrinology
- Faculty of Medicine
- J.N. Medical College
- Aligarh Muslim University
- Aligarh 202002
| | - Zarina Arif
- Department of Biochemistry
- Faculty of Medicine
- J.N. Medical College
- Aligarh Muslim University
- Aligarh 202002
| | - Khursheed Alam
- Department of Biochemistry
- Faculty of Medicine
- J.N. Medical College
- Aligarh Muslim University
- Aligarh 202002
| | - Jamal Ahmad
- Rajiv Gandhi Centre for Diabetes and Endocrinology
- Faculty of Medicine
- J.N. Medical College
- Aligarh Muslim University
- Aligarh 202002
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27
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Guan F, Li X, Guo J, Yang G, Li X. Ganglioside-magnetosome complex formation enhances uptake of gangliosides by cells. Int J Nanomedicine 2015; 10:6919-30. [PMID: 26609230 PMCID: PMC4644171 DOI: 10.2147/ijn.s92228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Bacterial magnetosomes, because of their nano-scale size, have a large surface-to-volume ratio and are able to carry large quantities of bioactive substances such as enzymes, antibodies, and genes. Gangliosides, a family of sialic acid-containing glycosphingolipids, function as distinctive cell surface markers and as specific determinants in cellular recognition and cell-to-cell communication. Exogenously added gangliosides are often used to study biological functions, transport mechanisms, and metabolism of their endogenous counterparts. Absorption of gangliosides into cells is typically limited by their tendency to aggregate into micelles in aqueous media. We describe here a simple strategy to remove proteins from the magnetosome membrane by sodium dodecyl sulfate treatment, and efficiently immobilize a ganglioside (GM1 or GM3) on the magnetosome by mild ultrasonic treatment. The maximum of 11.7±1.2 µg GM1 and 11.6±1.5 μg GM3 was loaded onto 1 mg magnetosome, respectively. Complexes of ganglioside-magnetosomes stored at 4°C for certain days presented the consistent stability. The use of GM1-magnetosome complex resulted in the greatest enhancement of ganglioside incorporation by cells. GM3-magnetosome complex significantly inhibited EGF-induced phosphorylation of the epidermal growth factor receptor. Both of these effects were further enhanced by the presence of a magnetic field.
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Affiliation(s)
- Feng Guan
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, People’s Republic of China
| | - Xiang Li
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, People’s Republic of China
| | - Jia Guo
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, People’s Republic of China
| | - Ganglong Yang
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, People’s Republic of China
| | - Xiang Li
- Wuxi Medical School, Jiangnan University, Wuxi, People’s Republic of China
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28
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Naik KM, Nandibewoor ST. Investigation into the interaction of methylparaben and erythromycin with human serum albumin using multispectroscopic methods. LUMINESCENCE 2015; 31:433-441. [DOI: 10.1002/bio.2979] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 05/12/2015] [Accepted: 06/21/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Keerti M. Naik
- Post Graduate Department of Studies in Chemistry; Karnatak University; Dharwad 580 003 India
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29
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Garzón A, Bravo I, Carrión-Jiménez MR, Rubio-Moraga Á, Albaladejo J. Spectroscopic study on binding of gentisic acid to bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 150:26-33. [PMID: 26010705 DOI: 10.1016/j.saa.2015.05.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 05/14/2015] [Accepted: 05/15/2015] [Indexed: 06/04/2023]
Abstract
The interaction of (gentisic acid) GA with (bovine serum albumin) BSA has been studied by different spectroscopic techniques. GA is a monoanionic specie at the working pH of 7.4, it was determined by combining UV-Vis absorption spectroscopy and theoretical calculations. A set of fluorescence quenching experiments at different temperatures was carried out employing the native fluorescence of BSA. A Stern-Volmer constant (KSV) of (2.07±0.12)×10(4) mol(-1) L and a binding constant (Ka) of (8.47±4.39)×10(3) were determined at 310 K. The static quenching caused by the BSA-GA complex formation seems to play a significant role in the overall quenching process. A single binding site on BSA for GA was observed. ΔH=-55.6±0.2 kJ mol(-1) and ΔS=-104.3±0.6 J mol(-1) K(-1) were determined in a set of experiments on the dependence of Ka with the temperature. The binding process is, therefore, spontaneous and enthalpy-driven. Van der Waals forces and hydrogen bonds could also play the major role in the binding mode. The secondary structure changes of BSA in the absence and presence of GA were studied by FTIR and UV-Vis absorption spectroscopy.
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Affiliation(s)
- Andrés Garzón
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los estudiantes, s/n, 02071 Albacete, Spain.
| | - Iván Bravo
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los estudiantes, s/n, 02071 Albacete, Spain
| | - M Rosario Carrión-Jiménez
- Departamento de Química Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los estudiantes, s/n, 02071 Albacete, Spain
| | - Ángela Rubio-Moraga
- Instituto Botánico, Facultad de Farmacia, Universidad de Castilla-La Mancha, Paseo de los estudiantes, s/n, 02071 Albacete, Spain
| | - José Albaladejo
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad de Castilla-La Mancha, Avenida Camilo José Cela, 10, 13071 Ciudad Real, Spain
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30
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Shu Y, Xue W, Xu X, Jia Z, Yao X, Liu S, Liu L. Interaction of erucic acid with bovine serum albumin using a multi-spectroscopic method and molecular docking technique. Food Chem 2015; 173:31-7. [DOI: 10.1016/j.foodchem.2014.09.164] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/01/2014] [Accepted: 09/29/2014] [Indexed: 10/24/2022]
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Yang L, Lv J, Wang X, Zhang J, Li Q, Zhang T, Zhang Z, Zhang L. Direct interactions in the recognition between the environmental estrogen bisphenol AF and human serum albumin. J Mol Recognit 2015; 28:459-66. [DOI: 10.1002/jmr.2463] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 10/29/2014] [Accepted: 01/14/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Lijun Yang
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Junna Lv
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Xin Wang
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Jing Zhang
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Qi Li
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Tingting Zhang
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Zhenzhen Zhang
- College of Chemistry; Liaoning University; Shenyang 110036 China
| | - Lei Zhang
- College of Chemistry; Liaoning University; Shenyang 110036 China
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Naik PN, Nandibewoor ST, Chimatadar SA. Non-covalent binding analysis of sulfamethoxazole to human serum albumin: Fluorescence spectroscopy, UV-vis, FT-IR, voltammetric and molecular modeling. J Pharm Anal 2015; 5:143-152. [PMID: 29403926 PMCID: PMC5762205 DOI: 10.1016/j.jpha.2015.01.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 01/09/2015] [Accepted: 01/12/2015] [Indexed: 12/04/2022] Open
Abstract
This study was designed to examine the interaction of sulfamethoxazole (SMZ) with human serum albumin(HSA). Spectroscopic analysis of the emission quenching at different temperatures revealed that the quenching mechanism of human serum albumin by SMZ was static mechanism. The binding constant values for the SMZ–HSA system were obtained to be 22,500 L/mol at 288 K, 15,600 L/mol at 298 K, and 8500 L/mol at 308 K. The distance r between donor and acceptor was evaluated according to the theory of Föster energy transfer. The results of spectroscopic analysis and molecular modeling techniques showed that the conformation of human serum albumin had been changed in the presence of SMZ. The thermodynamic parameters, namely enthalpy change (∆H0) −36.0 kJ/mol, entropy change (∆S0) −41.3 J/mol K and free energy change (∆G0) −23.7 kJ/mol, were calculated by using van׳t Hoff equation. The effect of common ions on the binding of SMZ to HSA was tested.
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Yue Y, Liu R, Liu J, Dong Q, Fan J. Experimental and theoretical investigation on the interaction between cyclovirobuxine D and human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:552-558. [PMID: 24691369 DOI: 10.1016/j.saa.2014.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 02/13/2014] [Accepted: 03/08/2014] [Indexed: 06/03/2023]
Abstract
Cyclovirobuxine D is an active compound extracted from the plant Buxux microphylla, and widely available as medications; however, its abuse may casts potential detrimental effects on human health. By using multispectroscopic techniques and molecular modeling, the interaction of cyclovirobuxine D with human serum albumin was investigated. The fluorescence results manifested that static type was the operative mechanism for the interaction with human serum albumin. The structural investigation of the complexed HSA through CD, three-dimensional, FT-IR and synchronous fluorescence shown the polypeptide chain of HSA partially destabilizing. Docking studies revealed the molecule to be bound in the subdomain IIA. Finally, we investigated the distance between the bound ligand and Trp-214 of human serum albumin.
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Affiliation(s)
- Yuanyuan Yue
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China; School of Environment, Henan Normal University, Xinxiang, Henan 453007, PR China.
| | - Ren Liu
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Jianming Liu
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Qiao Dong
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Jing Fan
- School of Environment, Henan Normal University, Xinxiang, Henan 453007, PR China
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Naik KM, Kolli DB, Nandibewoor ST. Elucidation of binding mechanism of hydroxyurea on serum albumins by different spectroscopic studies. SPRINGERPLUS 2014; 3:360. [PMID: 25089250 PMCID: PMC4117864 DOI: 10.1186/2193-1801-3-360] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/05/2014] [Indexed: 11/24/2022]
Abstract
Objectives The interaction of hydroxyurea (HU) with serum albumins (SAs) has not been investigated so far. However, it necessitates the interaction study of HU with SAs in phosphate buffer of pH 7.4. Methods The binding of HU on bovine serum albumin (BSA) and human serum albumin (HSA) was studied in vitro under simulated physiological conditions by spectroscopic methods viz., fluorescence, FT-IR, UV–vis absorption, synchronous fluorescence and three-dimensional fluorescence. Results The Stern-Volmer plot indicated the presence of dynamic quenching mechanism in the interaction of HU with SAs. The number of binding sites, n and binding constants, K were obtained at various temperatures according to the double logarithm regression curve. The result of FT-IR spectra, UV–vis absorption, synchronous fluorescence and three-dimensional fluorescence spectra showed that the conformation of SAs has been changed in the presence of HU. The thermodynamic parameters were calculated according to van’t Hoff equation and discussed. Conclusion This kind of study of interaction between BSA and HSA with HU would be useful in pharmaceutical industry, life sciences and clinical medicine.
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Affiliation(s)
- Keerti M Naik
- P. G. Department of Studies in Chemistry, Karnatak University, Dharwad, 580 003 India
| | - Deepa B Kolli
- P. G. Department of Studies in Chemistry, Karnatak University, Dharwad, 580 003 India
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Gowda JI, Nandibewoor ST. Binding and conformational changes of human serum albumin upon interaction with 4-aminoantipyrine studied by spectroscopic methods and cyclic voltammetry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 124:397-403. [PMID: 24508878 DOI: 10.1016/j.saa.2014.01.028] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 12/19/2013] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
The interactions of 4-aminoantipyrine (AAP) with human serum albumin (HSA) have been studied by UV-visible spectroscopy, fluorescence spectroscopy and cyclic voltammetry. The binding of 4-aminoantipyrine quenches the HSA fluorescence, revealing a 1:1 interaction with a binding constant of about 10(5) M(-1). The experimental results showed that AAP effectively quenched the intrinsic fluorescence of HSA via dynamic type of quenching. In addition, according to the synchronous fluorescence spectra of HSA in presence of 4-aminoantipyrine, the tryptophan residue of the proteins are most perturbed by the binding process. The number of binding sites, the binding constant, site probe study, some common metal ions effect and the thermodynamic parameters were calculated.
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Affiliation(s)
- Jayant I Gowda
- P.G. Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India
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Banerjee V, Kar RK, Datta A, Parthasarathi K, Chatterjee S, Das KP, Bhunia A. Use of a small peptide fragment as an inhibitor of insulin fibrillation process: a study by high and low resolution spectroscopy. PLoS One 2013; 8:e72318. [PMID: 24009675 PMCID: PMC3756998 DOI: 10.1371/journal.pone.0072318] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/10/2013] [Indexed: 01/13/2023] Open
Abstract
A non-toxic, nine residue peptide, NIVNVSLVK is shown to interfere with insulin fibrillation by various biophysical methods. Insulin undergoes conformational changes under certain stress conditions leading to amyloid fibrils. Fibrillation of insulin poses a problem in its long-term storage, reducing its efficacy in treating type II diabetes. The dissociation of insulin oligomer to monomer is the key step for the onset of fibrillation. The time course of insulin fibrillation at 62°C using Thioflavin T fluorescence shows an increase in the lag time from 120 min without peptide to 236 min with peptide. Transmission electron micrographs show branched insulin fibrils in its absence and less inter-fibril association in its presence. Upon incubation at 62°C and pH 2.6, insulin lost some α-helical structure as seen by Fourier transformed infra-red spectroscopy (FT-IR), but if the peptide is added, secondary structure is almost fully maintained for 3 h, though lost partially at 4 h. FT-IR spectroscopy also shows that insulin forms the cross beta structure indicative of fibrils beyond 2 h, but in the presence of the peptide, α-helix retention is seen till 4 h. Both size exclusion chromatography and dynamic light scattering show that insulin primarily exists as trimer, whose conversion to a monomer is resisted by the peptide. Saturation transfer difference nuclear magnetic resonance confirms that the hydrophobic residues in the peptide are in close contact with an insulin hydrophobic groove. Molecular dynamics simulations in conjunction with principal component analyses reveal how the peptide interrupts insulin fibrillation. In vitro hemolytic activity of the peptide showed insignificant cytotoxicity against HT1080 cells. The insulin aggregation is probed due to the inter play of two key residues, Phe(B24) and Tyr(B26) monitored from molecular dynamics simulations studies. Further new peptide based leads may be developed from this nine residue peptide.
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Affiliation(s)
| | - Rajiv K. Kar
- Biomolecular NMR and Drug Design Laboratory, Department of Biophysics, Bose Institute, Kolkata, India
| | - Aritreyee Datta
- Biomolecular NMR and Drug Design Laboratory, Department of Biophysics, Bose Institute, Kolkata, India
| | | | - Subhrangsu Chatterjee
- Biomolecular NMR and Drug Design Laboratory, Department of Biophysics, Bose Institute, Kolkata, India
| | - Kali P. Das
- Department of Chemistry, Bose Institute, Kolkata, India
| | - Anirban Bhunia
- Biomolecular NMR and Drug Design Laboratory, Department of Biophysics, Bose Institute, Kolkata, India
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Huang Z, Wang R, Han E, Xu L, Song Y. Investigation of the association behaviors between bovine serum albumin and 2-(4-methylphenyl)-3-(N-acetyl)-5-(2,4-dichlorophenoxymethyl)-1,3,4-oxodiazoline. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 111:260-265. [PMID: 23665471 DOI: 10.1016/j.saa.2013.04.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Revised: 03/16/2013] [Accepted: 04/02/2013] [Indexed: 06/02/2023]
Abstract
The study was designed to examine the interaction between 2-(4-methylphenyl)-3-(N-acetyl)-5-(2,4-dichlorophenoxymethyl)-1,3,4-oxodiazoline (MPNDO) and bovine serum albumin (BSA) under physiological conditions by using fluorescence spectroscopy, ultraviolet absorption spectroscopy, FT-IR spectroscopy and circular dichroism spectroscopy and atomic force microscope. Spectroscopic analysis of the fluorescence emission quenching and ultraviolet absorption revealed that the quenching mechanism of bovine serum albumin by MPNDO was static quenching procedure. The binding constant and binding sites number at different temperatures were measured. The average binding distances between donor (BSA) and acceptor (MPNDO) was estimated to be 1.46 nm (301 K), based on the Föster non-radioactive energy transfer theory. An average size of 3.1 nm had a high proportion and these dots might be ascribed to BSA, some other dots with an average size of 6.6 nm might result from BSA-MPNDO bioconjugates while the average diameter of MPNDO was 1.6 nm, which was reasonable to conclude that one BSA-MPNDO bioconjugates consisted of one BSA and one MPNDO. The thermodynamic parameters, enthalpy change (ΔH), entropy change (ΔS) and free energy change (ΔG) were calculated, which indicated that the action force was mainly van der Waals forces. The data collected through synchronous fluorescence, FT-IR spectroscopy and circular dichroism spectroscopy demonstrated that the conformation of BSA was not affected obviously in the presence of MPNDO.
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Affiliation(s)
- Zhenzhong Huang
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
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38
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Naik KM, Nandibewoor ST. Spectral characterization of the binding and conformational changes of bovine serum albumin upon interaction with an anti-fungal drug, methylparaben. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 105:418-423. [PMID: 23334503 DOI: 10.1016/j.saa.2012.12.055] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 12/20/2012] [Accepted: 12/22/2012] [Indexed: 06/01/2023]
Abstract
The binding of methylparaben with bovine serum albumin (BSA) was investigated by spectroscopic methods viz., fluorescence, FT-IR and UV-vis absorption techniques under physiological conditions i.e., pH 7.4. Spectroscopic analysis of the emission quenching at different temperatures revealed that the quenching mechanism of bovine serum albumin by methylparaben shows a dynamic quenching. The binding sites number n and binding constants, K were obtained at various temperatures. The distance, r between methylparaben and BSA was evaluated according to the theory of Förster energy transfer. The result of FT-IR spectra and UV-vis absorption spectra showed that the conformation of bovine serum albumin has been changed in the presence of methylparaben. The thermodynamic parameters, enthalpy change (ΔH(0)) and entropy change (ΔS(0)) were calculated according to van't Hoff equation, which indicated that the hydrophobic interaction was the predominant intermolecular force stabilizing the complex. The effect of common ions and site probes were also carried on the binding of methylparaben to BSA.
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Affiliation(s)
- Keerti M Naik
- Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India
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Khatoon F, Moinuddin, Alam K, Ali A. Physicochemical and immunological studies on 4-hydroxynonenal modified HSA: implications of protein damage by lipid peroxidation products in the etiopathogenesis of SLE. Hum Immunol 2012; 73:1132-9. [PMID: 22917540 DOI: 10.1016/j.humimm.2012.08.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 07/21/2012] [Accepted: 08/09/2012] [Indexed: 10/28/2022]
Abstract
4-Hydroxynonenal (HNE) is the most abundant and toxic aldehyde generated by the oxidation of plasma membrane polyunsaturated fatty acids. Systemic lupus erythematosus (SLE), a chronic autoimmune disease, is primarily characterized by increased levels of autoantibodies, predominantly against ds-DNA. However, the initial antigenic stimulus for the disease etiopathogenesis has remained elusive. HNE has been extensively used as a biomarker of oxidative stress. It can form adduct with proteins, making them highly immunogenic. Increased levels of such aldehyde-protein adducts have been reported in various pathological states, including autoimmune disorders like SLE and arthritis. In the present study, HNE-mediated structural changes in human serum albumin (HSA) were characterized by UV, fluorescence, CD and FT-IR spectroscopy as well as by polyacrylamide gel electrophoresis. Furthermore, immunogenicity of native and HNE-modified HSA was probed in female rabbits. The HNE-modified HSA was highly immunogenic eliciting high titre immunogen specific antibodies. Binding of SLE anti-DNA antibodies was analyzed by direct binding and competition ELISA. The data show preferential binding of SLE autoantibodies to HNE-modified HSA as compared to native HSA or native DNA. Our results suggest that HNE modification generates neoepitopes on HSA causing enhanced autoantibodies production. The results point towards the possible role of HNE-modified HSA in SLE etiopathogenesis.
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Affiliation(s)
- Farzana Khatoon
- Department of Biochemistry, JN Medical College, Faculty of Medicine, AMU, Aligarh, India
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Chatterjee T, Pal A, Dey S, Chatterjee BK, Chakrabarti P. Interaction of virstatin with human serum albumin: spectroscopic analysis and molecular modeling. PLoS One 2012; 7:e37468. [PMID: 22649528 PMCID: PMC3359307 DOI: 10.1371/journal.pone.0037468] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 04/24/2012] [Indexed: 12/20/2022] Open
Abstract
Virstatin is a small molecule that inhibits Vibrio cholerae virulence regulation, the causative agent for cholera. Here we report the interaction of virstatin with human serum albumin (HSA) using various biophysical methods. The drug binding was monitored using different isomeric forms of HSA (N form ∼pH 7.2, B form ∼pH 9.0 and F form ∼pH 3.5) by absorption and fluorescence spectroscopy. There is a considerable quenching of the intrinsic fluorescence of HSA on binding the drug. The distance (r) between donor (Trp214 in HSA) and acceptor (virstatin), obtained from Forster-type fluorescence resonance energy transfer (FRET), was found to be 3.05 nm. The ITC data revealed that the binding was an enthalpy-driven process and the binding constants K(a) for N and B isomers were found to be 6.09×10(5 )M(-1) and 4.47×10(5) M(-1), respectively. The conformational changes of HSA due to the interaction with the drug were investigated from circular dichroism (CD) and Fourier Transform Infrared (FTIR) spectroscopy. For 1:1 molar ratio of the protein and the drug the far-UV CD spectra showed an increase in α- helicity for all the conformers of HSA, and the protein is stabilized against urea and thermal unfolding. Molecular docking studies revealed possible residues involved in the protein-drug interaction and indicated that virstatin binds to Site I (subdomain IIA), also known as the warfarin binding site.
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Affiliation(s)
| | - Aritrika Pal
- Department of Biochemistry, Bose Institute, Kolkata, India
| | - Sucharita Dey
- Bioinformatics Centre, Bose Institute, Kolkata, India
| | | | - Pinak Chakrabarti
- Department of Biochemistry, Bose Institute, Kolkata, India
- Bioinformatics Centre, Bose Institute, Kolkata, India
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Grzyb J, Gagoś M, Myśliwa-Kurdziel B, Bojko M, Gruszecki WI, Waloszek A, Strzałka K. Cadmium inhibitory action leads to changes in structure of ferredoxin:NADP(+) oxidoreductase. J Biol Phys 2012; 38:415-28. [PMID: 22912532 PMCID: PMC3388194 DOI: 10.1007/s10867-012-9262-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Accepted: 01/03/2012] [Indexed: 11/25/2022] Open
Abstract
This study deals with the influence of cadmium on the structure and function of ferredoxin:NADP(+) oxidoreductase (FNR), one of the key photosynthetic enzymes. We describe changes in the secondary and tertiary structure of the enzyme upon the action of metal ions using circular dichroism measurements, Fourier transform infrared spectroscopy and fluorometry, both steady-state and time resolved. The decrease in FNR activity corresponds to a gentle unfolding of the protein, caused mostly by a nonspecific binding of metal ions to multiple sites all over the enzyme molecule. The final inhibition event is most probably related to a bond created between cadmium and cysteine in close proximity to the FNR active center. As a result, the flavin cofactor is released. The cadmium effect is compared to changes related to ionic strength and other ions known to interact with cysteine. The complete molecular mechanism of FNR inhibition by heavy metals is discussed.Electronic supplementary material The online version of this article (doi:10.1007/s10867-012-9262-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Joanna Grzyb
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland
- Laboratory of Biological Physics, Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Mariusz Gagoś
- Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
- Department of Cell Biology, Institute of Biology, Maria Curie-Skłodowska University, 20-033 Lublin, Poland
| | - Beata Myśliwa-Kurdziel
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland
| | - Monika Bojko
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland
| | | | - Andrzej Waloszek
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland
| | - Kazimierz Strzałka
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, ul. Gronostajowa 7, 30-387 Krakow, Poland
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B S, Hegde AH, K C R, J S. Exploring the binding mechanism of ondansetron hydrochloride to serum albumins: spectroscopic approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:410-416. [PMID: 22112579 DOI: 10.1016/j.saa.2011.10.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Revised: 10/17/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
The mechanism of interaction of ondansetron hydrochloride (OND) to serum albumins [bovine serum albumin (BSA) and human serum albumin (HSA)] was studied for the first time employing fluorimetric, circular dichroism, FTIR and UV-vis absorption techniques under the simulated physiological conditions. Fluorimetric results were utilized to investigate the binding and conformational characteristics of protein upon interaction with varying concentrations of the drug. Higher binding constant values revealed the strong interaction between the drug and protein while the number of binding sites close to unity indicated single class of binding site for OND in protein. Thermodynamic results revealed that both hydrogen bond and hydrophobic interactions played a major role in stabilizing drug-protein complex. Site marker competitive experiments indicated that the OND bound to albumins at subdomin II A (Sudlow's site I). Further, the binding distance between OND and serum albumin was calculated based on the Förster's theory of non-radioactive energy transfer and found to be 2.30 and 3.41 nm, respectively for OND-BSA and OND-HSA. The circular dichroism data revealed that the presence of OND decreased the α-helix content of serum albumins. 3D-fluorescence results also indicated the conformational changes in protein upon interaction with OND. Further, the effects of some cations have been investigated in the interaction of drug to protein.
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Affiliation(s)
- Sandhya B
- Department of Chemistry, Karnatak University, Dharwad 580 003, India
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43
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Xu Y, Du D, Oyola R. Infrared study of the stability and folding kinetics of a series of β-hairpin peptides with a common NPDG turn. J Phys Chem B 2011; 115:15332-8. [PMID: 22136248 DOI: 10.1021/jp2046867] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The thermal stability and folding kinetics of a series of 15-residue β-hairpins with a common Type I [3:5] NPDG turn were studied using Fourier transform infrared spectroscopy (FTIR) and laser-induced temperature jump (T-jump) with infrared detection, respectively. Mutations at positions 3, 5, or 13 in the peptide sequence SEXYXNPDGTWTXTE, where X represents the position of mutation, were performed to study the roles of hydrophobic interactions in determining the thermodynamic and kinetic properties of β-hairpin folding. The thermal stability studies show a broad thermal folding/unfolding transition for all the peptides. T-jump studies indicate that these β-hairpin peptides fold in less than 2 μs. In addition, both folding and unfolding rate constants decrease with increasing strength of hydrophobic interactions. Kinetically, the hydrophobic interactions have more significant influence on the unfolding rate than the folding rate. Φ-value analysis indicates that the hydrophobic interactions between the side chains are mainly formed at the latter part of the transition-state region during the folding process. In summary, the results suggest that the formation of the native structure of these β-hairpins depends on the correct topology of the hydrophobic cluster. Besides the formation of the turn region as a key process for folding as suggested by previous studies, a hydrophobic collapse process may also play a crucial role during β-hairpin folding.
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Affiliation(s)
- Yao Xu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Peng X, Yao D, Pan Y, Yu Q, Ni S, Bian H, Huang F, Liang H. Study on the structural changes of bovine serum albumin with effects on polydatin binding by a multitechnique approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:209-214. [PMID: 21723188 DOI: 10.1016/j.saa.2011.06.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/09/2011] [Accepted: 06/02/2011] [Indexed: 05/31/2023]
Abstract
Polydatin is a traditional Chinese medicine which shows effective biological activity as antimicrobial and antiviral agent. The secondary structure changes of bovine serum albumin (BSA) were investigated by the methods of Fourier transform infrared spectroscopy (FT-IR), circular dichroism (CD) and Raman spectroscopy. The experimental results indicated that polydatin changed the secondary structure of BSA. The presence of polydatin decreased α-helix content of BSA. The conformations of disulfide bridges and the microenvironment of Tyr, Trp residues were also changed.
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Affiliation(s)
- Xialian Peng
- Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry & Chemical Engineering of Guangxi Normal University, Guilin 541004, PR China
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Lorin A, Noël M, Provencher MÈ, Turcotte V, Masson C, Cardinal S, Lagüe P, Voyer N, Auger M. Revisiting peptide amphiphilicity for membrane pore formation. Biochemistry 2011; 50:9409-20. [PMID: 21942823 DOI: 10.1021/bi201335t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It has previously been shown that an amphipathic de novo designed peptide made of 10 leucines and four phenylalanines substituted with crown ethers induces vesicle leakage without selectivity. To gain selectivity against negatively charged dimyristoylphosphatidylglycerol (DMPG) bilayers, one or two leucines of the peptide were substituted with positively charged residues at each position. All peptides induce significant calcein leakage of DMPG vesicles. However, some peptides do not induce significant leakage of zwitterionic dimyristoylphosphatidylcholine vesicles and are thus active against only bacterial model membranes. The intravesicular leakage is induced by pore formation instead of membrane micellization. Nonselective peptides are mostly helical, while selective peptides mainly adopt an intermolecular β-sheet structure. This study therefore demonstrates that the position of the lysine residues significantly influences the secondary structure and bilayer selectivity of an amphipathic 14-mer peptide, with β-sheet peptides being more selective than helical peptides.
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Affiliation(s)
- Aurélien Lorin
- Département de chimie, Regroupement québécois de recherche sur la fonction, la structure et l'ingénierie des protéines, Centre de recherche sur les matériaux avancés, Université Laval, Québec, Québec, Canada G1V 0A6
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Wang C, Li Y. Study on the binding of propiconazole to protein by molecular modeling and a multispectroscopic method. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:8507-8512. [PMID: 21702493 DOI: 10.1021/jf200970s] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Propiconazole (PCZ) is an N-substituted triazole used as a fungicide on fruits, grains, seeds, hardwoods, and conifers. Although the triazole fungicides have shorter half-lives and lower bioaccumulation than the organochlorine pesticides, possible detrimental effects on the aquatic ecosystem and human health also exist. To evaluate the toxicity of PCZ at the protein level, its effects on human serum albumin (HSA) were characterized by molecular modeling and multispectroscopic method. On the basis of the fluorescence spectra, PCZ exhibited remarkable fluorescence quenching, which was attributed to the formation of a complex. The thermodynamic parameters ΔH and ΔS were calculated to be -14.980 KJ/mol and 26.966 J/(mol K), respectively, according to the van't Hoff equation, which suggests hydrophobic and electrostatic interactions are the predominant intermolecular forces in stabilizing the PCZ-protein complex. Furthermore, HSA conformation was slightly altered in the presence of PCZ. These results indicated that PCZ indeed affected the conformation of HSA.
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Affiliation(s)
- Chao Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, and College of Environment, Hohai University, NanJing, JiangSu Province, China
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Omidvar Z, Parivar K, Sanee H, Amiri-Tehranizadeh Z, Baratian A, Saberi MR, Asoodeh A, Chamani J. Investigations with Spectroscopy, Zeta Potential and Molecular Modeling of the Non-Cooperative Behaviour Between Cyclophosphamide Hydrochloride and Aspirin upon Interaction with Human Serum Albumin: Binary and Ternary Systems from the View Point of Multi-Drug Therapy. J Biomol Struct Dyn 2011; 29:181-206. [DOI: 10.1080/07391102.2011.10507382] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Sandhya B, Hegde AH, Kalanur SS, Katrahalli U, Seetharamappa J. Interaction of triprolidine hydrochloride with serum albumins: Thermodynamic and binding characteristics, and influence of site probes. J Pharm Biomed Anal 2011; 54:1180-6. [DOI: 10.1016/j.jpba.2010.12.012] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Revised: 12/06/2010] [Accepted: 12/09/2010] [Indexed: 11/25/2022]
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Hegde AH, Sandhya B, Kalanur SS, Seetharamappa J. Binding Mechanism of Bioactive Cetirizine Hydrochloride to Sudlow’s Site I of Serum Albumins. J SOLUTION CHEM 2011. [DOI: 10.1007/s10953-010-9640-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Naik P, Chimatadar S, Nandibewoor S. Interaction between a potent corticosteroid drug – Dexamethasone with bovine serum albumin and human serum albumin: A fluorescence quenching and fourier transformation infrared spectroscopy study. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2010; 100:147-59. [DOI: 10.1016/j.jphotobiol.2010.05.014] [Citation(s) in RCA: 171] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/25/2010] [Accepted: 05/31/2010] [Indexed: 10/19/2022]
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