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Lan T, Dong Y, Jiang L, Zhang Y, Sui X. Analytical approaches for assessing protein structure in protein-rich food: A comprehensive review. Food Chem X 2024; 22:101365. [PMID: 38623506 PMCID: PMC11016869 DOI: 10.1016/j.fochx.2024.101365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 03/24/2024] [Accepted: 04/05/2024] [Indexed: 04/17/2024] Open
Abstract
This review focuses on changes in nutrition and functional properties of protein-rich foods, primarily attributed to alterations in protein structures. We provide a comprehensive overview and comparison of commonly used laboratory methods for protein structure identification, aiming to offer readers a convenient understanding of these techniques. The review covers a range of detection technologies employed in food protein analysis and conducts an extensive comparison to identify the most suitable method for various proteins. While these techniques offer distinct advantages for protein structure determination, the inherent complexity of food matrices presents ongoing challenges. Further research is necessary to develop and enhance more robust detection methods to improve accuracy in protein conformation and structure analysis.
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Affiliation(s)
- Tian Lan
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yabo Dong
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Lianzhou Jiang
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
| | - Yan Zhang
- College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Xiaonan Sui
- College of Food Science, Northeast Agricultural University, Harbin 150030, China
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2
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Mashood Ahamed FM, Shakya B, Shakya S. Synthesis and characterization of a novel Mannich base benzimidazole derivative to explore interaction with human serum albumin and antimicrobial property: experimental and theoretical approach. J Biomol Struct Dyn 2023; 41:8701-8714. [PMID: 36284457 DOI: 10.1080/07391102.2022.2136757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/09/2022] [Indexed: 10/31/2022]
Abstract
The novel Mannich base benzimidazole derivative (CB-1), 1-((1H-benzo[d]imidazol-1-yl)(3-chlorophenyl)methyl)-3-phenylurea) has been designed and synthesized by reacting benzimidazole, 3-chloro benzaldehyde, and N-Phenyl urea. CB-1 has been characterized by UV- Visible, FTIR, and 1H NMR. CB-1 was explored to study the interaction with the most abundant blood protein which involved in the role of transport of molecules (drugs), human serum albumin (HSA). Fluorescence results are evident for the presence of both dynamic and static quenching mechanisms in the binding of CB-1 to HSA. Antimicrobial screening were carried out against three bacteria and three fungi pathogens employing disc diffusion method. Molecular docking using AutoDock Vina tool further confirms the experimental binding interactions obtained from fluorescence. Density functional theory (DFT) with B3LYP/6-311G++ basis set was used for correlating theoretical data and obtaining optimized structures of CB-1 along with reactants with molecular electrostatic potential (MEP) map and HOMO→LUMO energy gap calculation. HIGHLIGHTSThe novel Mannich base benzimidazole derivative (CB-1) has been designed and synthesized by Mannich reaction.CB-1 has been characterized by UV- Visible, FTIR, and 1H NMR.Fluorescence quenching reveals that HSA binds to CB-1 via aromatic residues, which is corroborated by molecular docking.Antifungal and antibacterial activity was evaluated in comparison to Nystatin and Gentamicin standard drugs, respectively.DFT calculations support experimental data and provide HOMO-LUMO energy gap.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- F M Mashood Ahamed
- PG and Research Department of Chemistry, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli, India
| | - Barkha Shakya
- Department of Zoology, Aligarh Muslim University, Aligarh, India
| | - Sonam Shakya
- Department of Chemistry, Aligarh Muslim University, Aligarh, India
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3
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Tavares MC, Dos Santos Nascimento IJ, de Aquino TM, de Oliveira Brito T, Macedo F, Modolo LV, de Fátima Â, Santos JCC. The influence of N-alkyl chains in benzoyl-thiourea derivatives on urease inhibition: Soil studies and biophysical and theoretical investigations on the mechanism of interaction. Biophys Chem 2023; 299:107042. [PMID: 37263179 DOI: 10.1016/j.bpc.2023.107042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 06/03/2023]
Abstract
Ureases are enzymes produced by fungi, plants, and bacteria associated with agricultural and clinical problems. The urea hydrolysis in NH3 and CO2 leads to the loss of N-urea fertilizers in soils and changes the human stomach microenvironment, favoring the colonization of H. pylori. In this sense, it is necessary to evaluate potential enzyme inhibitors to mitigate the effects of their activities and respond to scientific and market demands to produce fertilizers with enhanced efficiency. Thus, biophysical and theoretical studies were carried out to evaluate the influence of the N-alkyl chain in benzoyl-thiourea derivatives on urease enzyme inhibition. A screening based on IC50, binding constants, and theoretical studies demonstrated that BTU1 without the N-alkyl chain (R = H) was more active than other compounds, so the magnitude of the interaction was determined as BTU1 > BTU2 > BTU3 > BTU4 > BTU5, corresponding to progressively increased chain length. Thus, BTU1 was selected for interaction and soil application essays. The binding constants (Kb) for the supramolecular urease-BTU1 complex ranged from 7.95 to 5.71 × 103 M-1 at different temperatures (22, 30, and 38 °C), indicating that the preferential forces responsible for the stabilization of the complex are hydrogen bonds and van der Waals forces (ΔH = -15.84 kJ mol-1 and ΔS = -36.61 J mol-1 K-1). Theoretical and experimental results (thermodynamics, synchronous fluorescence, and competition assay) agree and indicate that BTU1 is a mixed inhibitor. Finally, urease inhibition was evaluated in the four soil samples, where BTU1 was as efficient as NBPT (based on ANOVA two-way and Tukey test with 95% confidence), with an average inhibition of 20% of urease activity. Thus, the biophysics and theoretical studies are strategies for evaluating potential inhibitors and showed that increasing the N-alkyl chain in benzoyl-thiourea derivatives did not favor urease inhibition.
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Affiliation(s)
- Maria Célia Tavares
- Instituto de Química e Biotecnologia, Universidade Federal de Alagoas, Maceió, AL, Brazil; Instituto Federal de Educação, Ciência e Tecnologia de Alagoas, Campus Batalha, AL, Brazil
| | | | | | - Tiago de Oliveira Brito
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | - Fernando Macedo
- Departamento de Química, Centro de Ciências Exatas, Universidade Estadual de Londrina, Londrina, PR, Brazil
| | - Luzia Valentina Modolo
- Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ângelo de Fátima
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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4
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Khan IM, Khan A, Shakya S, Islam M. Exploring the photocatalytic activity of synthesized hydrogen bonded charge transfer co-crystal of chloranilic acid with 2-ethylimidazole: DFT, molecular docking and spectrophotometric studies in different solvents. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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5
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Zhang Y, Cao Y, Li Y, Zhang X. Interactions between Human Serum Albumin and Sulfadimethoxine Determined Using Spectroscopy and Molecular Docking. Molecules 2022; 27:molecules27051526. [PMID: 35268627 PMCID: PMC8911820 DOI: 10.3390/molecules27051526] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/19/2022] [Accepted: 02/22/2022] [Indexed: 11/16/2022] Open
Abstract
Sulfonamides are widely used antibiotics in agricultural production. However, the potential threat of these drugs to human health has increased global concern. Human serum albumin (HSA) is the main reservoir and transporter of exogenous small molecules in humans. In this study, the interaction between sulfadimethoxine (SMT) and human serum albumin (HSA) was studied using spectroscopy and computer simulation. Our results showed that the hydrogen bonding and van der Waals forces drove SMT to enter the binding site I of HSA spontaneously and resulted in the fluorescence quenching of HSA. The stability of the HSA–SMT complex decreased with an increase in temperature. The binding of SMT to HSA induced alterations in the secondary structure of HSA, where the content of α-helix decreased from 61.0% of the free state to 59.0% of the compound state. The π–π, π–σ, and π–alkyl interactions between HSA and SMT were found to play important roles in maintaining the stability of the complex.
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Affiliation(s)
- Yuai Zhang
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China;
- NanChang Bozekang Pharmaceutical Technology Co., Ltd., Nanchang 330000, China
| | - Yiqing Cao
- Department of Pharmaceutical Analysis, School of Pharmacy, Fudan University, Shanghai 201203, China;
| | - Yan Li
- Department of Pharmaceutical Analysis, School of Pharmacy, Fudan University, Shanghai 201203, China;
- Correspondence: (Y.L.); (X.Z.)
| | - Xuemei Zhang
- Department of Pharmacology, School of Pharmacy, Fudan University, Shanghai 201203, China;
- Correspondence: (Y.L.); (X.Z.)
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6
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Li N, Yang X, Chen F, Zeng G, Zhou L, Li X, Tuo X. Spectroscopic and in silico insight into the interaction between dicofol and human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120277. [PMID: 34455384 DOI: 10.1016/j.saa.2021.120277] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/20/2021] [Accepted: 08/09/2021] [Indexed: 06/13/2023]
Abstract
Dicofol, a broad-spectrum acaricide, has garnered considerable attention because of the potential harm to the environment and various organisms. Herein, this study applied spectroscopic and in silico methods to understand the interaction between human serum albumin (HSA) and dicofol. Fluorescence experiments demonstrated that dicofol formed a stable complex and the binding process occurred in Suldow's site I of HSA. Its binding constant was 2.26 × 105 M-1 at 298 K. Van der Waals forces and hydrogen bond were primarily facilitated the interaction between dicofol and HSA (ΔH < 0, ΔS < 0) according to thermodynamic experiments. Additionally, 3D fluorescence and circular dichroism (CD) spectra revealed a few conformational changes in HSA due to dicofol. Molecular docking analysis indicated that dicofol interacted with Ser192, Gln196, Leu481, Arg218, Leu238, and Phe211 via van der Waals forces and formed a hydrogen bond with His242. Molecular dynamics (MD) simulation showed that Lys195 and Arg218 residues contributed greater energy for forming the HSA-dicofol complex. MD simulation analysis also showed that dicofol can affect the HSA structure with a reduction in α-helix. This research is desired to facilitate a new perspective on the toxicity mechanism of dicofol in the human body.
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Affiliation(s)
- Na Li
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Xi Yang
- School of Pharmacy, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Fengping Chen
- School of Pharmacy, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Guofang Zeng
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Like Zhou
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Xiaoke Li
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Xun Tuo
- College of Chemistry, Nanchang University, Nanchang, Jiangxi 330031, China.
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7
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Wang J, Yu X, Jia R, Liu R, Zong W. An in vitro and in silico study to explore the response of catalase to 4-chlorophenol and their interacting mechanisms. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Ayanlowo AG, Garádi Z, Boldizsár I, Darcsi A, Nedves AN, Varjas B, Simon A, Alberti Á, Riethmüller E. UHPLC-DPPH method reveals antioxidant tyramine and octopamine derivatives in Celtis occidentalis. J Pharm Biomed Anal 2020; 191:113612. [PMID: 32980795 DOI: 10.1016/j.jpba.2020.113612] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/01/2020] [Accepted: 09/01/2020] [Indexed: 11/19/2022]
Abstract
Celtis occidentalis L. (common Hackberry, Cannabaceae) has been applied in the traditional medicine for a long time as a remedy for sore throat, aid during menstruation and for treating jaundice. Nevertheless, the phytochemical exploration of the plant is still incomplete, literature data is limited to flavonoid derivatives isolated from the leaves. The present study reports screening approaches for bioactive compounds in C. occidentalis by fast and simple UHPLC-coupled assays. The UHPLC-DPPH method revealed six constituents in the methanolic extract of the twigs that had not been reported in C. occidentalis before. The antioxidant compounds were isolated by the means of flash chromatography and semi-preparative HPLC and identified by Orbitrap® MS and NMR spectroscopy as N-trans-p-coumaroyloctopamine (1), N-trans-feruloyloctopamine (2), N-trans-caffeoyltyramine (3), 2-trans-3-(4-hydroxyphenyl)-N-[2-(4-hydroxyphenyl)-2-oxoethyl] prop-2-enamide (4), N-trans-p-coumaroyltryramine (5) and N-trans-feruloyltyramine (6). Despite the high antioxidant activity measured in the present study and literature data suggesting potential positive effects of the compounds in the central nervous system, the PAMPA-BBB assay performed with the Celtis extract revealed that none of the aforementioned compounds are able to penetrate across the blood-brain barrier via transcellular passive diffusion.
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Affiliation(s)
| | - Zsófia Garádi
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | - Imre Boldizsár
- Department of Plant Anatomy, Eötvös Loránd University, Budapest, Hungary
| | - András Darcsi
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | | | - Bence Varjas
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | - Alexandra Simon
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
| | - Ágnes Alberti
- Department of Pharmacognosy, Semmelweis University, Budapest, Hungary
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9
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Leonard W, Zhang P, Ying D, Fang Z. Tyramine-derived hydroxycinnamic acid amides in plant foods: sources, synthesis, health effects and potential applications in food industry. Crit Rev Food Sci Nutr 2020; 62:1608-1625. [PMID: 33206548 DOI: 10.1080/10408398.2020.1845603] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Tyramine-derived hydroxycinnamic acid amines (HCAAT) are naturally occurring group of secondary metabolites present in various plant genera, such as Allium, Cannabis, Lycium, Polyganotum and Solanum. It belongs to the neutral, water-insoluble compounds and plays a role in plant growth, development and defence mechanism. The past two decades have seen a shift in the study of HCAAT from its role in plants to its potent biological activities. This review highlights the sources, roles in plants, biosynthetic pathways, metabolic engineering and chemical synthesis of HCAAT. The biological properties of HCAAT remain the focus in this paper, including antioxidant, anti-inflammatory, anti-cancer, anti-diabetic, anti-melanogenesis and neuroprotective properties. The effects of food processing and technology on HCAAT are also discussed. Given the current research gap, this review proposes future directions on the study of HCAAT, as well as its potential applications in food and pharmaceutical industry.
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Affiliation(s)
- William Leonard
- School of Agriculture and Food, The University of Melbourne, Melbourne, Victoria, Australia
| | - Pangzhen Zhang
- School of Agriculture and Food, The University of Melbourne, Melbourne, Victoria, Australia
| | - Danyang Ying
- CSIRO Agriculture & Food, Werribee, Victoria, Australia
| | - Zhongxiang Fang
- School of Agriculture and Food, The University of Melbourne, Melbourne, Victoria, Australia
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10
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Exploring interaction dynamics of designed organic cocrystal charge transfer complex of 2-hydroxypyridine and oxalic acid with human serum albumin: Single crystal, spectrophotometric, theoretical and antimicrobial studies. Bioorg Chem 2020; 100:103872. [DOI: 10.1016/j.bioorg.2020.103872] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 04/20/2020] [Indexed: 01/29/2023]
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11
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Caruso ÍP, Vilegas W, Cristante de Oliveira L, Cornélio ML. Fluorescence spectroscopic and dynamics simulation studies on isoorientin binding with human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 228:117738. [PMID: 31718973 DOI: 10.1016/j.saa.2019.117738] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 10/29/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Isoorientin (ISOO) a glycosylated flavonoid found in acai berry exhibits relevant activities such as antidiabetic and antidepressant. However, its physicochemical action on any molecular target is scarcely known. In this work, we tackle the problem about the binding of ISOO to human serum albumin (HSA) applying fluorescence spectroscopy bimodal analysis aided by computational simulations. A static quenching process was detected having hypsochromic shift with implication in the polarizability around the endogenous probe (Trp 214) during complex formation. The binding mechanism reveals that all sites are equivalents and independents with binding constant value of 9.1 × 104 M-1 and, a total of six sites accessed whereas three of them were identified experimentally. The thermodynamic evaluation indicates that the complex formation is spontaneous (ΔG<0). The dynamics and docking simulations corroborated the experimental data by adding details of each site and its respective microenvironment.
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Affiliation(s)
- Ícaro Putinhon Caruso
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas (IBILCE), UNESP, Rua Cristovão Colombo 2265, CEP 15054-000, São José do Rio Preto, SP, Brazil; Centro Nacional de Ressonância Magnética Nuclear de Macromoléculas, Instituto de Bioquímica Média e Centro Nacional de Biologia Estrutural e Bioimagem (CENABIO), UFRJ, Ilha do Fundão, CEP 21941-590, Rio de Janeiro, RJ, Brazil.
| | - Wagner Vilegas
- Laboratório de Bioprospecção de Produtos Naturais (LBPN), Instituto de Biociências, UNESP, Praça Infante Dom Henrique, CEP 11380-972, São Vicente, SP, Brazil.
| | - Leandro Cristante de Oliveira
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas (IBILCE), UNESP, Rua Cristovão Colombo 2265, CEP 15054-000, São José do Rio Preto, SP, Brazil.
| | - Marinônio Lopes Cornélio
- Departamento de Física, Instituto de Biociências, Letras e Ciências Exatas (IBILCE), UNESP, Rua Cristovão Colombo 2265, CEP 15054-000, São José do Rio Preto, SP, Brazil.
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12
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Molecular interaction of manganese based carbon monoxide releasing molecule (MnCORM) with human serum albumin (HSA). Bioorg Chem 2019; 92:103078. [DOI: 10.1016/j.bioorg.2019.103078] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 06/12/2019] [Accepted: 06/17/2019] [Indexed: 12/25/2022]
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13
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Liu B, Jin SF, Li HC, Sun XY, Yan SQ, Deng SJ, Zhao P. The Bio-Safety Concerns of Three Domestic Temporary Hair Dye Molecules: Fuchsin Basic, Victoria Blue B and Basic Red 2. Molecules 2019; 24:molecules24091744. [PMID: 31060332 PMCID: PMC6539679 DOI: 10.3390/molecules24091744] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 12/14/2022] Open
Abstract
Hair-coloring products include permanent, semi-permanent and temporary dyes that vary by chemical formulation and are distinguished mainly by how long they last. Domestic temporary hair dyes, such as fuchsin basic, basic red 2 and Victoria blue B, are especially popular because of their cheapness and facile applications. Despite numerous studies on the relationship between permanent hair dyes and disease, there are few studies addressing whether these domestic temporary hair dyes are associated with an increased cancer risk. Herein, to ascertain the bio-safety of these temporary hair dyes, we comparatively studied their percutaneous absorption, hemolytic effect and cytotoxic effects in this paper. Furthermore, to better understand the risk of these dyes after penetrating the skin, experimental and theoretical studies were carried out examining the interactions between the dyes and serum albumins as well as calf thymus (CT)-DNA. The results showed that these domestic temporary hair dyes are cytotoxic with regard to human red blood cells and NIH/3T3 cell lines, due to intense interactions with bovine serum albumin (BSA)/DNA. We conclude that the temporary hair dyes may have risk to human health, and those who use them should be aware of their potential toxic effects.
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Affiliation(s)
- Bing Liu
- Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China.
- Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou 510006, China.
| | - Shu-Fang Jin
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, China.
| | - Hua-Chao Li
- Guangzhou Key Laboratory of Construction and Application of New Drug Screening Model Systems, Guangdong Pharmaceutical University, Guangzhou 510006, China.
- Key Laboratory of New Drug Discovery and Evaluation of Ordinary Universities of Guangdong Province, Guangdong Pharmaceutical University, Guangzhou 510006, China.
| | - Xiang-Yu Sun
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, China.
| | - Si-Qi Yan
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, China.
| | - Shu-Jun Deng
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, China.
| | - Ping Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, No. 280, Waihuandong Road, Education Mega Centre, Guangzhou 510006, China.
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14
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Mukherjee S, Ganorkar K, Kumar A, Sehra N, Ghosh SK. Switching of Trp-214 intrinsic rotamer population in human serum albumin: An insight into the aftermath of embracing therapeutic bioorganic luminophore azapodophyllotoxin into sudlow site I. Bioorg Chem 2019; 84:63-75. [DOI: 10.1016/j.bioorg.2018.11.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/02/2018] [Accepted: 11/13/2018] [Indexed: 01/14/2023]
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15
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Kumar H, Devaraji V, Joshi R, Wankar S, Ghosh SK. A Chalcone-Based Potential Therapeutic Small Molecule That Binds to Subdomain IIA in HSA Precisely Controls the Rotamerization of Trp-214. ACS OMEGA 2018; 3:10114-10128. [PMID: 31459141 PMCID: PMC6644364 DOI: 10.1021/acsomega.8b01079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 08/20/2018] [Indexed: 06/10/2023]
Abstract
The principal intent of this work is to explore whether the site-specific binding of a newly synthesized quinoline-appended anthracenyl chalcone, (E)-3-(anthracen-10-yl)-1-(6,8-dibromo-2-methylquinolin-3-yl)prop-2-en-1-one (ADMQ), with an extracellular protein of the human circulatory system, human serum albumin (HSA), can control the rotamerization of its sole tryptophan residue, Trp-214. With this aim, we have systematically studied the binding affinity, interactions, and localization pattern of the title compound inside the specific binding domain of the transport protein and any conformation alteration caused therein. Multiple spectroscopic experiments substantiated by an in silico molecular modeling exercise provide evidence for the binding of the guest ADMQ in the hydrophobic domain of HSA, which is primarily constituted by residues Trp-214, Arg-218, Arg-222, Asp-451, and Tyr-452. Rotationally restricted ADMQ prefers to reside in Sudlow site I (subdomain IIA) of HSA in close proximity (2.45 nm) to the intrinsic fluorophore Trp-214 and is interestingly found to control its vital rotamerization process. The driving force for this rotational interconversion is predominantly found to be governed by the direct interaction of ADMQ with Trp-214. However, the role of induced conformational perturbation in the biomacromolecule itself upon ADMQ adoption cannot be ruled out completely, as indicated by circular dichroism, 3D fluorescence, root-mean-square deviation, root-mean-square fluctuation, and secondary structure element observations. The comprehensive spectroscopic study outlined herein provides important information on the biophysical interaction of a chalcone-based potential therapeutic candidate with a carrier protein, exemplifying its utility in having a regulatory effect on the microconformations of Trp-214.
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Affiliation(s)
- Himank Kumar
- Department
of Chemistry, Visvesvaraya National Institute
of Technology, Nagpur, Maharashtra 440010, India
| | - Vinod Devaraji
- Department
of Pharmaceutical Chemistry, College of Pharmacy, Madras Medical College, Chennai 600003, India
| | - Ritika Joshi
- Department
of Chemistry, Visvesvaraya National Institute
of Technology, Nagpur, Maharashtra 440010, India
| | - Sneha Wankar
- Department
of Chemistry, Visvesvaraya National Institute
of Technology, Nagpur, Maharashtra 440010, India
| | - Sujit Kumar Ghosh
- Department
of Chemistry, Visvesvaraya National Institute
of Technology, Nagpur, Maharashtra 440010, India
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16
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Guo X, Yao J, Liu X, Wang H, Zhang L, Xu L, Hao A. LaPO 4:Eu fluorescent nanorods, synthesis, characterization and spectroscopic studies on interaction with human serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 198:248-256. [PMID: 29549866 DOI: 10.1016/j.saa.2018.02.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 01/25/2018] [Accepted: 02/24/2018] [Indexed: 06/08/2023]
Abstract
Eu3+ doped LaPO4 fluorescent nanorods (LaPO4:Eu) was successfully fabricated by a hydrothermal process. The obtained LaPO4:Eu nanorods under the optimal conditions were characterized by means of transmission electron microscopy (TEM), X-ray diffraction (XRD) technique, Fourier transform infrared (FTIR), UV-vis absorption and fluorescence spectroscopy. The nanorods with a length of 50-100nm and a diameter of about 10nm, can emit strong red fluorescence upon excitation at 241nm. The FTIR result confirmed that there are lots of phosphate groups on the surfaces of nanorods. In order to better understand the physiological behavior of nanorods in human body, multiple spectroscopic methods were used to study the interaction between the LaPO4:Eu nanorods and human serum albumin (HSA) in the simulated physiological conditions. The results indicated that the nanorods can effectively quench the intrinsic fluorescence of HSA through a dynamic quenching mode with the association constants of the order of 103Lmol-1. The values of the thermodynamic parameters suggested that the binding of the nanorods to HSA was a spontaneous process and van der Waals forces and hydrogen bonds played a predominant role. The displacement experiments verified that the binding site of nanorods on HSA was mainly located in the hydrophobic pocket of subdomain IIA (site I) of HSA. The binding distance between nanorods and HSA was calculated to be 4.2nm according to the theory of Förster non-radiation energy transfer. The analysis of synchronous fluorescence, three-dimensional fluorescence (3D) and circular dichroism (CD) spectra indicated that there the addition of LaPO4:Eu nanorods did not caused significant alterations in conformation of HSA secondary structure and the polarity around the amino acid residues.
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Affiliation(s)
- Xingjia Guo
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Jie Yao
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Xuehui Liu
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Hongyan Wang
- Jingzhou Products Quality Supervision and Testing Institute, Jinzhou 121000, PR China
| | - Lizhi Zhang
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Liping Xu
- College of Chemistry, Liaoning University, Shenyang 110036, PR China
| | - Aijun Hao
- College of Pharmacy, Liaoning University, Shenyang 110036, PR China.
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17
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Is the Sudlow site I of human serum albumin more generous to adopt prospective anti-cancer bioorganic compound than that of bovine: A combined spectroscopic and docking simulation approach. Bioorg Chem 2017; 75:332-346. [DOI: 10.1016/j.bioorg.2017.10.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 10/16/2017] [Accepted: 10/22/2017] [Indexed: 11/18/2022]
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18
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Yang H, Huang Y, Liu J, Tang P, Sun Q, Xiong X, Tang B, He J, Li H. Binding modes of environmental endocrine disruptors to human serum albumin: insights from STD-NMR, ITC, spectroscopic and molecular docking studies. Sci Rep 2017; 7:11126. [PMID: 28894220 PMCID: PMC5593971 DOI: 10.1038/s41598-017-11604-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 08/29/2017] [Indexed: 12/17/2022] Open
Abstract
Given that bisphenols have an endocrine-disrupting effect on human bodies, thoroughly exposing their potential effects at the molecular level is important. Saturation transfer difference (STD) NMR-based binding studies were performed to investigate the binding potential of two bisphenol representatives, namely, bisphenol B (BPB) and bisphenol E (BPE), toward human serum albumin (HSA). The relative STD (%) suggested that BPB and BPE show similar binding modes and orientations, in which the phenolic rings were spatially close to HSA binding site. ITC analysis results showed that BPB and BPE were bound to HSA with moderately strong binding affinity through electrostatic interactions and hydrogen bonds. The order of binding affinity of HSA for two test bisphenols is as follows: BPE > BPB. The results of fluorescence competitive experiments using 5-dimethylaminonaphthalene-1-sulfonamide and dansylsarcosine as competitors, combined with molecular docking indicated that both bisphenols are prone to attach to the binding site II in HSA. Spectroscopic results (FT-IR, CD, synchronous and 3D fluorescence spectra) showed that BPB/BPE induces different degrees of microenvironmental and conformational changes to HSA.
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Affiliation(s)
- Hongqin Yang
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yanmei Huang
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Jiuyang Liu
- School of Life Sciences, University of Science and Technology of China, Hefei, 230026, China
| | - Peixiao Tang
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
| | - Qiaomei Sun
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Xinnuo Xiong
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Bin Tang
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Jiawei He
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Hui Li
- College of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
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19
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Liu J, Yan X, Yue Y, Zhao S. Investigation of the interaction of aurantio-obtusin with human serum albumin by spectroscopic and molecular docking methods. LUMINESCENCE 2017; 33:104-111. [DOI: 10.1002/bio.3378] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/30/2017] [Accepted: 06/09/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Normal University; Xinxiang Henan P. R. China
- Henan Key Laboratory of Green Chemical Media and Reactions, School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan P. R. China
| | - Xuyang Yan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Normal University; Xinxiang Henan P. R. China
| | - Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Normal University; Xinxiang Henan P. R. China
- Henan Key Laboratory of Green Chemical Media and Reactions, School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan P. R. China
| | - Shufang Zhao
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education; Henan Normal University; Xinxiang Henan P. R. China
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20
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Olatunji OJ, Chen H, Zhou Y. Neuroprotective effect of trans-N-caffeoyltyramine from Lycium chinense against H 2O 2 induced cytotoxicity in PC12 cells by attenuating oxidative stress. Biomed Pharmacother 2017; 93:895-902. [PMID: 28715870 DOI: 10.1016/j.biopha.2017.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 06/24/2017] [Accepted: 07/05/2017] [Indexed: 01/03/2023] Open
Abstract
Natural products play a critical role in the promotion of good health as regards the prevention and management of oxidative stress related and neurodegenerative disorders. Oxidative stress has been implicated in several apoptotic pathways associated with cell damages in neuronal disorders. The aim of this study was to investigate the antioxidant effect of trans-N-caffeoyltyramine (TNC) isolated from Cortex lycii against hydrogen peroxide (H2O2) induced cell damages in PC12 cells as well as its mechanism of action. The results obtained indicated that pretreatment with TNC before the exposure of cells to H2O2 toxicity lead to a significant increase in the cell viability and the antioxidant enzyme activities catalase (CAT), superoxide dismutase (SOD), glutathione (GSH) and reduced the level of malondialdehyde (MDA). Furthermore, TNC attenuated the influx of Ca2+, ROS formation and restored the impaired mitochondria membrane potential (MMP). Thus TNC may be used as an alternative therapy for the prevention and treatment of neuronal disorders elicited by oxidative stress.
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Affiliation(s)
- Opeyemi J Olatunji
- Faculty of Thai Traditional Medicine, Prince of Songkla University, Hat Yai, 90112, Thailand
| | - Hongxia Chen
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, China
| | - Yifeng Zhou
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden Mem, Sun Yat-sen, Nanjing, 210014, China; Dongtai Institute of Tidal Flat, Nanjing Branch of Chinese Academy of Sciences, Dongtai 224200, China.
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21
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Chaves OA, de Barros LS, de Oliveira MC, Sant’Anna CMR, Ferreira AB, da Silva FA, Cesarin-Sobrinho D, Netto-Ferreira JC. Biological interactions of fluorinated chalcones: Stimulation of tyrosinase activity and binding to bovine serum albumin. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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22
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Domain-specific interactions between MLN8237 and human serum albumin estimated by STD and WaterLOGSY NMR, ITC, spectroscopic, and docking techniques. Sci Rep 2017; 7:45514. [PMID: 28358124 PMCID: PMC5371984 DOI: 10.1038/srep45514] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/27/2017] [Indexed: 12/26/2022] Open
Abstract
Alisertib (MLN8237) is an orally administered inhibitor of Aurora A kinase. This small-molecule inhibitor is under clinical or pre-clinical phase for the treatment of advanced malignancies. The present study provides a detailed characterization of the interaction of MLN8237 with a drug transport protein called human serum albumin (HSA). STD and WaterLOGSY nuclear magnetic resonance (NMR)-binding studies were conducted first to confirm the binding of MLN8237 to HSA. In the ligand orientation assay, the binding sites of MLN8237 were validated through two site-specific spy molecules (warfarin sodium and ibuprofen, which are two known site-selective probes) by using STD and WaterLOGSY NMR competition techniques. These competition experiments demonstrate that both spy molecules do not compete with MLN8237 for the specific binding site. The AutoDock-based blind docking study recognizes the hydrophobic subdomain IB of the protein as the probable binding site for MLN8237. Thermodynamic investigations by isothermal titration calorimetry (ITC) reveal that the non-covalent interaction between MLN8237 and HSA (binding constant was approximately 105 M−1) is driven mainly by favorable entropy and unfavorable enthalpy. In addition, synchronous fluorescence, circular dichroism (CD), and 3D fluorescence spectroscopy suggest that MLN8237 may induce conformational changes in HSA.
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23
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Cheng LY, Fang M, Bai AM, Ouyang Y, Hu YJ. Insights into the interaction of methotrexate and human serum albumin: A spectroscopic and molecular modeling approach. LUMINESCENCE 2017; 32:873-879. [DOI: 10.1002/bio.3267] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/03/2016] [Accepted: 11/16/2016] [Indexed: 01/03/2023]
Affiliation(s)
- Li-Yang Cheng
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Min Fang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Ai-Min Bai
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Yu Ouyang
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
| | - Yan-Jun Hu
- Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Department of Chemistry; Hubei Normal University; Huangshi 435002 People's Republic of China
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education); Wuhan University; Wuhan 430072 People's Republic of China
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24
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Assaran Darban R, Shareghi B, Asoodeh A, Chamani J. Multi-spectroscopic and molecular modeling studies of interaction between two different angiotensin I converting enzyme inhibitory peptides from gluten hydrolysate and human serum albumin. J Biomol Struct Dyn 2016; 35:3648-3662. [PMID: 27897084 DOI: 10.1080/07391102.2016.1264892] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The present study was carried out to characterize Angiotensin-converting enzyme (ACE) inhibitory peptides which are released from the trypsin hydrolysate of wheat gluten protein. The binding of two inhibitory peptide (P4 and P6) to human serum albumin (HSA) under physiological conditions has been investigated by multi-spectroscopic in combination with molecular modeling techniques. Time-resolved and quenching fluorescence spectroscopies results revealed that the quenching of HSA fluorescence by P4 and P6 in the binary and ternary systems caused HSA-peptides complexes formation. The results indicated that both peptides quenched the fluorescence intensity of HSA through a static mechanism. The binding affinities and number of binding sites were obtained for the HSA-peptides complexes. The circular dichroism (CD) data revealed that the presence of both peptides increased the α-helix content of HSA and induced the remarkable folding of the polypeptide of the protein. Therefore, the CD data determined that the protein structure has been stabilized in the percent of ACE inhibitory peptides in binary and ternary systems. The binding distances between HSA and both peptides were estimated by the Forster theory, and it was revealed that nonradiative energy transfer from HSA to peptides occurred with a high probability. ITC experiments reveal that, in the absence and presence of P6, the dominant forces are electrostatic in binary and ternary systems. Furthermore, molecular modeling studies confirmed the experimental results. Molecular modeling investigation suggested that P4 bound to the site IA and IIA of HSA in binary and ternary systems, respectively. This study on the interaction of peptides with HSA should prove helpful for realizing the distribution and transportation of food compliments and drugs in vivo, elucidating the action mechanism and dynamics of food compliments and drugs at the molecular level. It should moreover be of great use for understanding the pharmacokinetic and pharmacodynamic mechanism of the food compliments and drugs.
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Affiliation(s)
- Reza Assaran Darban
- a Department of Biology, Faculty of Science , University of Shahrekord , P.O. Box 115 , Shahrekord , Iran
| | - Behzad Shareghi
- a Department of Biology, Faculty of Science , University of Shahrekord , P.O. Box 115 , Shahrekord , Iran
| | - Ahmad Asoodeh
- b Department of Chemistry, Faculty of Sciences , Ferdowsi University of Mashhad , Mashhad , Iran
| | - Jamshidkhan Chamani
- c Department of Biochemistry and Biophysics, Faculty of Sciences , Mashhad Branch, Islamic Azad University , Mashhad , Iran
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25
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Wang Y, Zhu M, Liu F, Wu X, Pan D, Liu J, Fan S, Wang Z, Tang J, Na R, Li QX, Hua R, Liu S. Comparative Studies of Interactions between Fluorodihydroquinazolin Derivatives and Human Serum Albumin with Fluorescence Spectroscopy. Molecules 2016; 21:molecules21101373. [PMID: 27754443 PMCID: PMC6273767 DOI: 10.3390/molecules21101373] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/05/2016] [Accepted: 10/12/2016] [Indexed: 12/15/2022] Open
Abstract
In the present study, 3-(fluorobenzylideneamino)-6-chloro-1-(3,3-dimethylbutanoyl)-phenyl-2,3-dihydroquinazolin-4(1H)-one (FDQL) derivatives have been designed and synthesized to study the interaction between fluorine substituted dihydroquinazoline derivatives with human serum albumin (HSA) using fluorescence, circular dichroism and Fourier transform infrared spectroscopy. The results indicated that the FDQL could bind to HSA, induce conformation and the secondary structure changes of HSA, and quench the intrinsic fluorescence of HSA through a static quenching mechanism. The thermodynamic parameters, ΔH, ΔS, and ΔG, calculated at different temperatures, revealed that the binding was through spontaneous and hydrophobic forces and thus played major roles in the association. Based on the number of binding sites, it was considered that one molecule of FDQL could bind to a single site of HSA. Site marker competition experiments indicated that the reactive site of HSA to FDQL mainly located in site II (subdomain IIIA). The substitution by fluorine in the benzene ring could increase the interactions between FDQL and HSA to some extent in the proper temperature range through hydrophobic effect, and the substitution at meta-position enhanced the affinity greater than that at para- and ortho-positions.
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Affiliation(s)
- Yi Wang
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
- Department of Applied Chemistry, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Meiqing Zhu
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Feng Liu
- Department of Applied Chemistry, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
| | - Xiangwei Wu
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Dandan Pan
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Jia Liu
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Shisuo Fan
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Zhen Wang
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Jun Tang
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Risong Na
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
- Collaborative Innovation Center of Henan Grain Crops, National Key Laboratory of Wheat and Maize Crop Science, College of Plant Protection, Henan Agricultural University, Wenhua Road No. 95, Zhengzhou 450002, China.
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii, 1955 East-West Road, Honolulu, HI 96822, USA.
| | - Rimao Hua
- Department of Science of Pesticides, School of Resources and Environment, Anhui Agricultural University, No. 130 Changjiang West Road, Hefei 230036, China.
| | - Shangzhong Liu
- Department of Applied Chemistry, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
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26
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Compositions, Formation Mechanism, and Neuroprotective Effect of Compound Precipitation from the Traditional Chinese Prescription Huang-Lian-Jie-Du-Tang. Molecules 2016; 21:molecules21081094. [PMID: 27548137 PMCID: PMC6272921 DOI: 10.3390/molecules21081094] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 07/26/2016] [Accepted: 08/01/2016] [Indexed: 11/17/2022] Open
Abstract
Compounds in the form of precipitation (CFP) are universally formed during the decocting of Chinese prescriptions, such as Huang-Lian-Jie-Du-Tang (HLJDT). The formation rate of HLJDT CFP even reached 2.63% ± 0.20%. The identification by liquid chromatography mass spectrometry (LC-MS(n)) proved that the main chemical substances of HLJDT CFP are baicalin and berberine, which is coincident with the theory that the CFP might derive from interaction between acidic and basic compounds. To investigate the formation mechanism of HLJDT CFP, baicalin and berberine were selected to synthesize a simulated precipitation and then the baicalin-berberine complex was obtained. Results indicated that the melting point of the complex interposed between baicalin and berberine, and the UV absorption, was different from the mother material. In addition, ¹H-NMR integral and high-resolution mass spectroscopy (HR-MS) can validate that the binding ratio was 1:1. Compared with baicalin, the chemical shifts of H and C on glucuronide had undergone significant changes by ¹H-, (13)C-NMR, which proved that electron transfer occurred between the carboxylic proton and the lone pair of electrons on the N atom. Both HLJDT CFP and the baicalin-berberine complex showed protective effects against cobalt chloride-induced neurotoxicity in differentiated PC12 cells. It is a novel idea, studying the material foundation of CFP in Chinese prescriptions.
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