1
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Li JX, Lu N, Tian R. (-)-Epigallocatechin gallate as an inhibitor of hemoglobin-catalyzed lipid oxidation: molecular mechanism of action and nutritional application. Toxicol In Vitro 2024; 99:105871. [PMID: 38851603 DOI: 10.1016/j.tiv.2024.105871] [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: 12/15/2023] [Revised: 05/22/2024] [Accepted: 06/05/2024] [Indexed: 06/10/2024]
Abstract
Hemoglobin (Hb) is effective inducer for lipid oxidation and protein-polyphenol interaction is a well-known phenomenon. The effects of the interaction of (-)-epigallocatechin gallate (EGCG) with Hb on lipid oxidation were rarely elucidated. The detailed interaction between bovine Hb and EGCG was systematically explored by experimental and theoretical approaches, to illustrate the molecular mechanisms by which EGCG influenced the redox states and stability of Hb. EGCG would bind to the central pocket of protein with one binding site to form Hb-EGCG complex. The binding constant for Hb-EGCG complex was 0.34 × 104 M-1 at 277 K, and thermodynamic parameters (ΔH > 0, ΔS > 0 and ΔG < 0) revealed the participation of hydrophobic forces in the binding process. The binding of EGCG would increase the compactness of protein molecule and diminish the crevice near the heme cavity, which was responsible for the reduction of met-Hb to oxy-Hb and inhibition of hemin release from met-Hb. Moreover, EGCG efficiently suppressed Hb-caused lipid oxidation in liposomes and cod muscles, which was possibly attributed to the reduction to oxy-Hb state and declined hemin dissociation from met-Hb. Altogether, our results provide significant insights into the binding of EGCG to redox-active Hb, which represents a novel mechanism for the anti-oxidant capacity of EGCG in human health and is favorable to the applications of natural EGCG in the good quality of Hb-containing products.
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Affiliation(s)
- Jia-Xin Li
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Naihao Lu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Rong Tian
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China.
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2
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Imtiaz F, Islam M, Saeed H, Ahmed A. Phenolic compounds from Tradescantia pallida ameliorate diabetes by inhibiting enzymatic and non-enzymatic pathways. J Biomol Struct Dyn 2023; 41:11872-11888. [PMID: 36597930 DOI: 10.1080/07391102.2022.2164059] [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: 10/01/2022] [Accepted: 12/24/2022] [Indexed: 01/05/2023]
Abstract
Diabetes is a chronic metabolic disorder marked by postprandial hyperglycemia due to several etiologies including abnormal carbohydrate digestion and glycation of hemoglobin. The prolong use of synthetic drugs results in characteristic side effects which necessitates the discovery of safe and cost-effective substitutes. The aim of the current study is to isolate and evaluate the antidiabetic potential of the phenolic compounds from the leaves of Tradescantia pallida. Syringic acid, p-coumaric acid, morin and catechin (compounds 1-4) were isolated and characterized from Tradescantia pallida leaves using column chromatography and spectroscopic techniques. The in vitro antidiabetic potential of the phenolic compounds were assessed using α-amylase and non-enzymatic glycosylation of hemoglobin protein assays. A mechanistic insight of interactions between phenolic compounds and human α-amylase and hemoglobin protein were scrutinized by employing molecular docking method. Prime Molecular Mechanics/Generalized Born Surface Area (MM-GBSA) calculations were carried out to find the binding energies of the ligand-protein complexes. Morin and catechin were further analyzed to find the dynamic and thermodynamic constraints of the complexes under specific biological conditions using molecular dynamic simulation trajectories. The stability and flexibility of the complexes were justified by fluctuation of α-carbon chain, Root Mean Square Deviation (RMSD), Root Mean Square Fluctuation (RMSF) and type of interactions involved which authenticated the in vitro inhibitory potential of morin and catechin against enzymatic and non-enzymatic pathways. The current study could be fruitful in rational designing of safe antidiabetic drugs of natural origin.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Fariha Imtiaz
- Section of Pharmaceutical Chemistry, Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Muhammad Islam
- Section of Pharmaceutical Chemistry, Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Hamid Saeed
- Section of Pharmaceutics, Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
| | - Abrar Ahmed
- Section of Pharmacognosy, Punjab University College of Pharmacy, University of the Punjab, Lahore, Pakistan
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3
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Tian R, Zhou L, Lu N. Binding of Quercetin to Hemoglobin Reduced Hemin Release and Lipid Oxidation. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12925-12934. [PMID: 36169386 DOI: 10.1021/acs.jafc.2c04129] [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] [Indexed: 06/16/2023]
Abstract
The interactions between quercetin and bovine (or human) hemoglobin (Hb) were systematically investigated by fluorescence, UV-vis absorption spectroscopy, and molecular docking to demonstrate the structural mechanism by which quercetin affected the Hb redox state and stability. Quercetin could interact with the central cavity of the Hb molecule with one binding site to generate an Hb-quercetin complex, and the hydrophobic interaction played an important role in the formation of the complex. The binding constant for the Hb-quercetin complex at 298 K was observed to be 1.25 × 104 M-1. In addition, quercetin effectively inhibited Hb-induced lipid oxidation in liposomes or washed muscles, which was ascribed to the conversion to oxy-Hb and decreased hemin dissociation from met-Hb. Consistent with its lower abilities to bind Hb and scavenge free radicals, rutin (i.e., quercetin-3-rhamnosylglucsoside) did not significantly influence the redox state of Hb nor reduce hemin release from Hb, and subsequently, it less effectively inhibited Hb-induced lipid oxidation than quercetin. Altogether, the results herein provide novel insights into the antioxidant mechanism for quercetin and are beneficial to the application of natural quercetin in Hb-containing foods.
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Affiliation(s)
- Rong Tian
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China
| | - Lan Zhou
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China
| | - Naihao Lu
- College of Chemistry and Chemical Engineering, Jiangxi Key Laboratory of Green Chemistry, Jiangxi Normal University, Nanchang 330022, China
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4
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Dai Y, Yang R, Yan Y, Wu Y, Meng X, Yang A, Wu Z, Shi L, Li X, Chen H. Digestive stability and transport ability changes of β-lactoglobulin–catechin complexes by M cell model in vitro. Front Nutr 2022; 9:955135. [PMID: 36071941 PMCID: PMC9441877 DOI: 10.3389/fnut.2022.955135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Accepted: 07/22/2022] [Indexed: 01/12/2023] Open
Abstract
The current research on interaction between catechin and protein has focused on non-covalent crosslinking, however, the mechanism of free radical-induced crosslinking between catechin and β-lactoglobulin (BLG) is not known. In this study, BLG bound to four catechins [epicatechin (EC), epigallocatechin (EGC), epicatechin gallate (ECG), and epigallocatechin gallate (EGCG)]. The structure change of complex was investigated by circular dichroism spectroscopy, ultraviolet-visible (UV-vis) spectroscopy and Acid and 8-Anilino-1-naphthalenesulfonic acid (ANS) fluorescence spectroscopy. M cell model was constructed to evaluate the transintestinal epithelial transport capacity of complex digestive products. The results showed that catechins were covalently bound to BLG by C-S and C-N bonds and their binding content was EGCG>EGC>ECG>EC. Moreover, catechins could change the secondary structure of BLG, with the decrease of α-helix and reduction of the irregular coilings, which leads to the loose spatial structure of the protein. Moreover, the catechin could enhance further the digestibility of BLG. Transport capacity of digestive products of M cell model was about twice of that of the Caco-2 cell model, indicating that M cell model had better antigen transport capacity. The difference between groups indicated that the transport efficiency of digestive products was decreased with the presence of catechin, in which BLG-EGCG and BLG-EGC groups were transported more strong than those of BLG-EC and BLG-ECG groups. The transport efficiency of BLG-catechin complexes were lower than that of BLG, indicating that catechin had the protective and repair roles on intestinal barrier permeability.
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Affiliation(s)
- Yan Dai
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Ruoting Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yuting Yan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
| | - Yong Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
| | - Xuanyi Meng
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
| | - Anshu Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
| | - Zhihua Wu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
| | - Linbo Shi
- Department of Pathogen Biology and Immunology, School of Basic Medical Sciences, Nanchang University, Nanchang, China
| | - Xin Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- School of Food Science and Technology, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
- *Correspondence: Xin Li,
| | - Hongbing Chen
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, China
- Sino-German Joint Research Institute, Nanchang University, Nanchang, China
- Jiangxi Province Key Laboratory of Food Allergy, Nanchang University, Nanchang, China
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5
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Synthesis, characterization, and biological evaluation of novel selenium-containing chitosan derivatives. Carbohydr Polym 2022; 284:119185. [DOI: 10.1016/j.carbpol.2022.119185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 01/10/2022] [Accepted: 01/22/2022] [Indexed: 12/28/2022]
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6
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Li D, Yang Y, Yang X, Wang Z, Yao X, Guo Y. Enhanced bioavailability and anti-hyperglycemic activity of young apple polyphenols by complexation with whey protein isolates. J Food Sci 2022; 87:1257-1267. [PMID: 35166381 DOI: 10.1111/1750-3841.16062] [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: 08/30/2021] [Revised: 12/29/2021] [Accepted: 01/04/2022] [Indexed: 12/01/2022]
Abstract
This study aims to evaluate the effects of complexation of whey protein isolate (WPI) and young apple polyphenols (YAP) on the bioavailability and anti-hyperglycemic activity of YAP. Two types of WPI-YAP complexes were fabricated by mixing WPI with YAP at 25℃ (WPI-YAP) and 90℃ (WPI-YAP-H), respectively. The intermolecular interactions between WPI and YAP were investigated by fluorescence spectroscopy and circular dichroism analyses. The in vitro bioaccessibility and bioavailability of YAP were determined using a simulated gastrointestinal digestion and human Caco-2 cells model. It was found that the total polyphenols transport efficiency was improved from 39.8% (YAP) to 48.2% (WPI-YAP) and 56.1% (WPI-YAP-H), indicating that the bioavailability of YAP was improved by complexation with WPI. Besides, after complexation with WPI, YAP displayed an improved in vivo effect on alleviating the increase in postprandial blood glucose level than the pure YAP, with WPI-YAP-H showing a better effect. This finding indicates that co-complexation of YAP with WPI is an effective way to improve the functionality of YAP, and the WPI-YAP complexes are also expected to have potential application in designing YAP-containing functional foods. PRACTICAL APPLICATION: The research provided a method to improve the bioavavibility of polyphenols, and the WPI-YAP complex can be developed in designing polyphenols related functional foods.
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Affiliation(s)
- Dan Li
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China.,School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, People's Republic of China
| | - Yongli Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China
| | - Xi Yang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China
| | - Zichao Wang
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China
| | - Xiaolin Yao
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, People's Republic of China
| | - Yurong Guo
- College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China.,National Research & Development Center of Apple Processing Technology, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China.,Engineering Research Center of High Value Utilization of Western China Fruit resources, Ministry of Education, Shaanxi Normal University, Xi'an, Shaanxi, People's Republic of China
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7
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Liu C, Lv N, Ren G, Wu R, Wang B, Cao Z, Xie H. Explore the interaction mechanism between zein and EGCG using multi-spectroscopy and molecular dynamics simulation methods. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2021.106906] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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8
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Molecular interaction of tea catechin with bovine β-lactoglobulin: A spectroscopic and in silico studies. Saudi Pharm J 2020; 28:238-245. [PMID: 32194324 PMCID: PMC7078544 DOI: 10.1016/j.jsps.2020.01.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 01/19/2020] [Indexed: 12/13/2022] Open
Abstract
Polyphenols has attained pronounced attention due to their beneficial values of health and found to prevent several chronic diseases. Here, we elucidated binding mechanism between frequently consumed polyphenol “tea catechin” and milk protein bovine beta-lactoglobulin (β-Lg). We investigated the conformational changes of β-Lg due to interaction with catechin using spectroscopic and in silico studies. Fluorescence quenching data (Stern-Volmer quenching constant) revealed that β-Lg interacted with catechin via dynamic quenching. Thermodynamic data revealed that the interaction between β-Lg and catechin is endothermic and spontaneously interacted mainly through hydrophobic interactions. The UV-Vis absorption and far-UV circular dichroism (CD) spectroscopy exhibited that the tertiary as well as secondary structure of β-Lg distorted after interaction with catechin. Molecular docking and simulation studies also confirm that catechin binds at the central cavity of β-Lg with high affinity (~105 M−1) and hydrophobic interactions play significant role in the formation of a stable β-Lg-catechin complex.
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9
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Bhuiya S, Chowdhury S, Das S. Molecular insight into the binding aspects of benzo[c]phenanthridine alkaloid nitidine with bovine hemoglobin: A biophysical exploration. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 223:117293. [PMID: 31260885 DOI: 10.1016/j.saa.2019.117293] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/04/2019] [Accepted: 06/18/2019] [Indexed: 06/09/2023]
Abstract
The association of a putative bioactive alkaloid nitidine (NIT) with blood protein bovine hemoglobin (BHb) was investigated by employing various biophysical and molecular docking techniques. NIT binding to BHb was first characterized by hypochromic effect on the Soret band absorption of BHb from spectrophotometric studies. Spectrofluorimetric titration and unchanged fluorescence lifetime of BHb confirmed ground state complexation followed by the static nature of the emission quenching mechanism of the protein induced by NIT. Substantial conformational changes in the protein structure were established from circular dichroism study. Conformational perturbation results a lowering in the α-helical organization of the tetrameric protein structure. Thermodynamics of the binding suggest that the binding is exothermic with a favourable small positive entropy change and negative enthalpy change making a sense of electrostatic interaction as the major acting force. Experimentally calculated free energy change for the NIT-BHb interaction was found to be -7.50 kcal mol-1 which is in well agreement to the theoretical docking energy value of -6.36 kcal mol-1. AutoDock based molecular docking suggests the internal cavity of BHb as the preferred binding position of NIT. Overall this manuscript depicts consequences on the molecular interaction of NIT with BHb from structural and energetic standpoints providing a profound insight into protein-ligand association.
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Affiliation(s)
- Sutanwi Bhuiya
- Biophysical Chemistry Laboratory, Physical Chemistry Section, Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
| | - Susmita Chowdhury
- Biophysical Chemistry Laboratory, Physical Chemistry Section, Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India
| | - Suman Das
- Biophysical Chemistry Laboratory, Physical Chemistry Section, Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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10
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Das S, Bora N, Rohman MA, Sharma R, Jha AN, Singha Roy A. Molecular recognition of bio-active flavonoids quercetin and rutin by bovine hemoglobin: an overview of the binding mechanism, thermodynamics and structural aspects through multi-spectroscopic and molecular dynamics simulation studies. Phys Chem Chem Phys 2018; 20:21668-21684. [PMID: 30101248 DOI: 10.1039/c8cp02760a] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The binding of two bio-active flavonoids, quercetin and rutin, with bovine hemoglobin (BHb) was investigated by multi-spectroscopic and computational (molecular docking and molecular dynamics simulation) studies. The two flavonoids were found to quench the intrinsic fluorescence of BHb through a static quenching mechanism. The binding constants at 288 K were observed to be (14.023 ± 0.73) × 104 M-1 and (7.848 ± 0.20) × 104 M-1, respectively for quercetin and rutin binding with BHb. Both rutin and quercetin were observed to increase the polarity around the Trp residues of BHb as indicated by synchronous and 3D spectral studies. No significant alterations in the secondary structural components of the protein were caused during the binding of the flavonoids as studied by CD and FTIR studies. The negative molar Gibbs free energies indicated the spontaneity of the interaction processes while the binding processes were characterized by a negative enthalpy change (ΔH) and a positive entropy change (ΔS). The possibility of energy transfer from the donor (BHb) to the acceptor molecules (flavonoids) was indicated by the FRET studies. According to the fluorescence studies, the flavonoids interact near to the β2-Trp37 residue of BHb. Excellent correlations with the experimental studies were observed from the molecular docking and molecular dynamics (MD) simulation studies. Further investigations established that these flavonoids are efficient in the inhibition of glucose mediated glycation of BHb.
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Affiliation(s)
- Sourav Das
- Department of Chemistry, National Institute of Technology, Meghalaya, Shillong 793003, India.
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11
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Cirkovic Velickovic TD, Stanic-Vucinic DJ. The Role of Dietary Phenolic Compounds in Protein Digestion and Processing Technologies to Improve Their Antinutritive Properties. Compr Rev Food Sci Food Saf 2017; 17:82-103. [PMID: 33350063 DOI: 10.1111/1541-4337.12320] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/18/2017] [Accepted: 10/18/2017] [Indexed: 12/11/2022]
Abstract
Digestion is the key step for delivering nutrients and bioactive substances to the body. The way different food components interact with each other and with digestive enzymes can modify the digestion process and affect human health. Understanding how food components interact during digestion is essential for the rational design of functional food products. Plant polyphenols have gained much attention for the bioactive roles they play in the human body. However, their strong beneficial effects on human health have also been associated with a negative impact on the digestion process. Due to the generally low absorption of phenolic compounds after food intake, most of the consumed polyphenols remain in the gastrointestinal tract, where they then can exert inhibitory effects on enzymes involved in the degradation of saccharides, lipids, and proteins. While the inhibitory effects of phenolics on the digestion of energy-rich food components (saccharides and lipids) may be regarded as beneficial, primarily in weight-control diets, their inhibitory effects on the digestion of proteins are not desirable for the reason of reduced utilization of amino acids. The effect of polyphenols on protein digestion is reviewed in this article, with an emphasis on food processing methods to improve the antinutritive properties of polyphenols.
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Affiliation(s)
- Tanja D Cirkovic Velickovic
- the Ghent Univ. Global Campus, 119 Songdomunhwa-Ro, Yeonsu-Gu, Incheon 21985, Korea.,Faculty of Bioscience Engineering, Ghent Univ., Coupure Links 653, 9000 Ghent, Belgium.,Center of Excellence for Molecular Food Sciences, Faculty of Chemistry, Univ. of Belgrade, Studenstki trg 16, 11 000 Belgrade, Serbia
| | - Dragana J Stanic-Vucinic
- Center of Excellence for Molecular Food Sciences, Faculty of Chemistry, Univ. of Belgrade, Studenstki trg 16, 11 000 Belgrade, Serbia
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12
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Perusko M, Al-Hanish A, Mihailovic J, Minic S, Trifunovic S, Prodic I, Cirkovic Velickovic T. Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction. Food Chem 2017; 232:744-752. [DOI: 10.1016/j.foodchem.2017.04.074] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 04/10/2017] [Accepted: 04/12/2017] [Indexed: 01/23/2023]
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13
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Jia J, Gao X, Hao M, Tang L. Comparison of binding interaction between β-lactoglobulin and three common polyphenols using multi-spectroscopy and modeling methods. Food Chem 2017; 228:143-151. [DOI: 10.1016/j.foodchem.2017.01.131] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/11/2017] [Accepted: 01/26/2017] [Indexed: 01/29/2023]
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14
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Yesudasan S, Wang X, Averett RD. Molecular dynamics simulations indicate that deoxyhemoglobin, oxyhemoglobin, carboxyhemoglobin, and glycated hemoglobin under compression and shear exhibit an anisotropic mechanical behavior. J Biomol Struct Dyn 2017; 36:1417-1429. [PMID: 28441918 DOI: 10.1080/07391102.2017.1323674] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We developed a new mechanical model for determining the compression and shear mechanical behavior of four different hemoglobin structures. Previous studies on hemoglobin structures have focused primarily on overall mechanical behavior; however, this study investigates the mechanical behavior of hemoglobin, a major constituent of red blood cells, using steered molecular dynamics (SMD) simulations to obtain anisotropic mechanical behavior under compression and shear loading conditions. Four different configurations of hemoglobin molecules were considered: deoxyhemoglobin (deoxyHb), oxyhemoglobin (HbO2), carboxyhemoglobin (HbCO), and glycated hemoglobin (HbA1C). The SMD simulations were performed on the hemoglobin variants to estimate their unidirectional stiffness and shear stiffness. Although hemoglobin is structurally denoted as a globular protein due to its spherical shape and secondary structure, our simulation results show a significant variation in the mechanical strength in different directions (anisotropy) and also a strength variation among the four different hemoglobin configurations studied. The glycated hemoglobin molecule possesses an overall higher compressive mechanical stiffness and shear stiffness when compared to deoxyhemoglobin, oxyhemoglobin, and carboxyhemoglobin molecules. Further results from the models indicate that the hemoglobin structures studied possess a soft outer shell and a stiff core based on stiffness.
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Affiliation(s)
- Sumith Yesudasan
- a School of Chemical, Materials, and Biomedical Engineering , College of Engineering, University of Georgia , 597 D.W. Brooks Drive, Athens , GA 30602 , USA
| | - Xianqiao Wang
- b School of Environmental, Civil, Agricultural and Mechanical Engineering , College of Engineering, University of Georgia , 712G Boyd Graduate Studies Research Center, Athens , GA 30602 , USA
| | - Rodney D Averett
- a School of Chemical, Materials, and Biomedical Engineering , College of Engineering, University of Georgia , 597 D.W. Brooks Drive, Athens , GA 30602 , USA
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Pharmacologically Active Plant Flavonols as Proton Transfer Based Multiparametric Fluorescence Probes Targeting Biomolecules: Perspectives and Prospects. REVIEWS IN FLUORESCENCE 2016 2017. [DOI: 10.1007/978-3-319-48260-6_4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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16
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Ren T, Zhang L, Wang J, Song C, Wang R, Chang J. Study on the interaction of taiwaniaquinoids with FTO by spectroscopy and molecular modeling. J Biomol Struct Dyn 2016; 35:3182-3193. [DOI: 10.1080/07391102.2016.1249957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Lijiao Zhang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Jinqian Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Chuanjun Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Ruiyong Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
| | - Junbiao Chang
- College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Avenue, Zhengzhou 450001, China
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17
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Lu N, Ding Y, Tian R, Yang Z, Chen J, Peng YY. Effects of pharmacological ascorbate on hemoglobin-induced cancer cell proliferation. Int J Biol Macromol 2016; 92:1215-1219. [PMID: 27527692 DOI: 10.1016/j.ijbiomac.2016.08.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/08/2016] [Accepted: 08/11/2016] [Indexed: 01/03/2023]
Abstract
The high heme content in red meat is associated with an increased risk of developing cancer. Pharmacologic concentrations of ascorbate can specifically kill a wide range of cancer cells. In this study, the impact of ascorbate at pharmacologic concentrations on hemoglobin (Hb)-modulated human hepatoma HepG2 cell survival was investigated. It was found that HepG2 cells were proliferated by Hb (5-25μM), but killed by high pharmacologic concentrations of ascorbate (2-10mM). Although ascorbate at the low pharmacologic concentration (0.5mM) alone exhibited insignificant effect on cell viability, it effectively inhibited Hb (10μM)-induced cancer cell proliferation. The mechanism of this cytotoxicity was based on the production of extracellular H2O2 and involved transition iron. The influence of ascorbate on Hb-dependent redox reactions (i.e. the oxidative stability of Hb and its cytotoxic ferryl intermediate) was further investigated to illustrate the reaction mechanism of ascorbate toxicity, where H2O2 was generated in the reaction of ascorbate with Hb. Furthermore, circular dichroism demonstrated no significant change in the secondary structure of Hb after ascorbate addition and molecular docking revealed binding modes of ascorbate with Hb. These results demonstrated that ascorbate could possess anti-cancer activity through interfering in Hb-dependent redox reactions.
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Affiliation(s)
- Naihao Lu
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Key Laboratory of Green Chemistry, Jiangxi Province and College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China.
| | - Yun Ding
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Key Laboratory of Green Chemistry, Jiangxi Province and College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Rong Tian
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Key Laboratory of Green Chemistry, Jiangxi Province and College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China
| | - Zhen Yang
- Department of Physics, University of Houston, Houston, TX, USA
| | - Jianfa Chen
- Department of Physics, University of Houston, Houston, TX, USA
| | - Yi-Yuan Peng
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education; Key Laboratory of Green Chemistry, Jiangxi Province and College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang, China.
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Lu N, Ding Y, Yang Z, Gao P. Effects of rutin on the redox reactions of hemoglobin. Int J Biol Macromol 2016; 89:175-80. [DOI: 10.1016/j.ijbiomac.2016.04.066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 04/21/2016] [Accepted: 04/22/2016] [Indexed: 01/17/2023]
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Serdiuk IE, Roshal AD, Błażejowski J. Origin of Spectral Features and Acid–Base Properties of 3,7-Dihydroxyflavone and Its Monofunctional Derivatives in the Ground and Excited States. J Phys Chem A 2016; 120:4325-37. [DOI: 10.1021/acs.jpca.6b03290] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Illia E. Serdiuk
- Department of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine
| | - Alexander D. Roshal
- Institute of Chemistry, V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine
| | - Jerzy Błażejowski
- Department of Chemistry, University of Gdańsk, 80-308 Gdańsk, Poland
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20
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Al-Hakeim HK, Al-Zabeba RS, Grulke E, Jaffar Al-Mulla EA. Interaction Of Calcium Phosphate Nanoparticles With Human Chorionic Gonadotropin Modifies Secondary And Tertiary Protein Structure. NOVA BIOTECHNOLOGICA ET CHIMICA 2015. [DOI: 10.1515/nbec-2015-0023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Calcium phosphate nanoparticles (CaPNP) have good biocompatibility and bioactivity inside human body. In this study, the interaction between CaPNP and human chorionic gonadotropin (hCG) was analyzed to determine the changes in the protein structure in the presence of CaPNP and the quantity of protein adsorbed on the CaPNP surface. The results showed a significant adsorption of hCG on the CaPNP nanoparticle surface. The optimal fit was achieved using the Sips isotherm equation with a maximum adsorption capacity of 68.23 µg/mg. The thermodynamic parameters, including ∆H° and ∆G°, of the adsorption process are positive, whereas ∆S° is negative. The circular dichroism results of the adsorption of hCG on CaPNP showed the changes in its secondary structure; such changes include the decomposition of α-helix strand and the increase in β-pleated sheet and random coil percentages. Fluorescence study indicated minimal changes in the tertiary structure near the microenvironment of the aromatic amino acids such as tyrosine and phenyl alanine caused by the interaction forces between the CaPNP and hCG protein. The desorption process showed that the quantity of the hCG desorbed significantly increases as temperature increases, which indicates the weak forces between hCG and the surface.
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Sahiner N, Sagbas S, Aktas N. Single step natural poly(tannic acid) particle preparation as multitalented biomaterial. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:824-834. [DOI: 10.1016/j.msec.2015.01.076] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 12/14/2014] [Accepted: 01/23/2015] [Indexed: 12/26/2022]
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Maity M, Dolui S, Maiti NC. Hydrogen bonding plays a significant role in the binding of coomassie brilliant blue-R to hemoglobin: FT-IR, fluorescence and molecular dynamics studies. Phys Chem Chem Phys 2015; 17:31216-27. [DOI: 10.1039/c5cp04661k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coomassie brilliant blue-R (CBB-R) specifically binds to bovine hemoglobin with a stoichiometric ratio of 1 : 1.
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Affiliation(s)
- Mritunjoy Maity
- Division of Structural Biology and Bioinformatics
- CSIR-Indian Institute of Chemical Biology
- India
| | - Sandip Dolui
- Division of Structural Biology and Bioinformatics
- CSIR-Indian Institute of Chemical Biology
- India
| | - Nakul C. Maiti
- Division of Structural Biology and Bioinformatics
- CSIR-Indian Institute of Chemical Biology
- India
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Pahari BP, Chaudhuri S, Chakraborty S, Sengupta PK. Ground and Excited State Proton Transfer of the Bioactive Plant Flavonol Robinetin in a Protein Environment: Spectroscopic and Molecular Modeling Studies. J Phys Chem B 2014; 119:2533-45. [DOI: 10.1021/jp508410v] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biswa Pathik Pahari
- Biophysics
and Structural Genomics Division, Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064, India
| | - Sudip Chaudhuri
- Gandhi
Centenary
B. T. College, Habra, Habra-Prafullanagar-743268, India
| | - Sandipan Chakraborty
- Department
of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700019, India
| | - Pradeep K. Sengupta
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India
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Han L, Zhou Y, Huang X, Xiao M, Zhou L, Zhou J, Wang A, Shen J. A multi-spectroscopic approach to investigate the interaction of prodigiosin with ct-DNA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 123:497-502. [PMID: 24440841 DOI: 10.1016/j.saa.2013.11.088] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 11/06/2013] [Accepted: 11/13/2013] [Indexed: 06/03/2023]
Abstract
The interaction between prodigiosin (PG) and calf thymus DNA (ct-DNA) was investigated firstly by using UV-Visible (UV-Vis), fluorescence, Fourier transform infrared (FT-IR), circular dichroism (CD) spectroscopies and viscosity measurement in Tris-HCl buffer solution (pH 6.8). The experimental results indicated that PG intercalated into the DNA helix. Upon addition of ct-DNA, PG showed hypochromic effect and slight redshift in the absorption spectra, and the melting temperature of ct-DNA was increased by from 58 to 64°C. Furthermore, FT-IR spectrum and CD spectra also suggested that the partial bases of ct-DNA react with prodigiosin. The fluorescence quenching mechanism was studied using ethidium bromide as a DNA probe, The binding constants of PG with ct-DNA in the presence of EB are 4.46×10(4) and 2.32×10(4)M(-1) at 298 and 310K, respectively, and the corresponding thermodynamic parameters ΔG, ΔH, ΔS at various temperatures were obtained.
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Affiliation(s)
- Lina Han
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Yanhuai Zhou
- Department of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Xiaoqin Huang
- Department of Physical Science and Technology, Nanjing Normal University, Nanjing 210023, China
| | - Mengsi Xiao
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Lin Zhou
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
| | - Jiahong Zhou
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China.
| | - Aihong Wang
- Nursing College of Nanjing University of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, China.
| | - Jian Shen
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of Biomedical Materials, College of Chemistry and Materials Science, Analysis and Testing Center, Key Laboratory of Applied Photochemistry, Nanjing Normal University, Nanjing 210023, China
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25
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Namadurai S, Balasuriya D, Rajappa R, Wiemhöfer M, Stott K, Klingauf J, Edwardson JM, Chirgadze DY, Jackson AP. Crystal structure and molecular imaging of the Nav channel β3 subunit indicates a trimeric assembly. J Biol Chem 2014; 289:10797-10811. [PMID: 24567321 PMCID: PMC4036194 DOI: 10.1074/jbc.m113.527994] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The vertebrate sodium (Nav) channel is composed of an ion-conducting α subunit and associated β subunits. Here, we report the crystal structure of the human β3 subunit immunoglobulin (Ig) domain, a functionally important component of Nav channels in neurons and cardiomyocytes. Surprisingly, we found that the β3 subunit Ig domain assembles as a trimer in the crystal asymmetric unit. Analytical ultracentrifugation confirmed the presence of Ig domain monomers, dimers, and trimers in free solution, and atomic force microscopy imaging also detected full-length β3 subunit monomers, dimers, and trimers. Mutation of a cysteine residue critical for maintaining the trimer interface destabilized both dimers and trimers. Using fluorescence photoactivated localization microscopy, we detected full-length β3 subunit trimers on the plasma membrane of transfected HEK293 cells. We further show that β3 subunits can bind to more than one site on the Nav 1.5 α subunit and induce the formation of α subunit oligomers, including trimers. Our results suggest a new and unexpected role for the β3 subunits in Nav channel cross-linking and provide new structural insights into some pathological Nav channel mutations.
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Affiliation(s)
- Sivakumar Namadurai
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QW, United Kingdom
| | - Dilshan Balasuriya
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, United Kingdom
| | - Rajit Rajappa
- Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch Strasse, 31 48149 Münster, Germany
| | - Martin Wiemhöfer
- Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch Strasse, 31 48149 Münster, Germany
| | - Katherine Stott
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QW, United Kingdom
| | - Jurgen Klingauf
- Institute of Medical Physics and Biophysics, University of Münster, Robert-Koch Strasse, 31 48149 Münster, Germany
| | - J Michael Edwardson
- Department of Pharmacology, University of Cambridge, Tennis Court Road, Cambridge CB2 1PD, United Kingdom
| | - Dimitri Y Chirgadze
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QW, United Kingdom.
| | - Antony P Jackson
- Department of Biochemistry, University of Cambridge, Tennis Court Road, Cambridge CB2 1QW, United Kingdom.
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Simultaneous quantitation of 5- and 7-hydroxyflavone antioxidants and their binding constants with BSA using dual chiral capillary electrophoresis (dCCE) and HPLC with fluorescent detection. Talanta 2014; 119:417-24. [DOI: 10.1016/j.talanta.2013.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 11/06/2013] [Accepted: 11/08/2013] [Indexed: 12/27/2022]
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27
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Shi JH, Wang J, Zhu YY, Chen J. Characterization of intermolecular interaction between cyanidin-3-glucoside and bovine serum albumin: Spectroscopic and molecular docking methods. LUMINESCENCE 2013; 29:522-30. [DOI: 10.1002/bio.2579] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2013] [Revised: 07/01/2013] [Accepted: 08/05/2013] [Indexed: 12/23/2022]
Affiliation(s)
- Jie-hua Shi
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou 310032 China
- State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology; Zhejiang University of Technology; Hangzhou 310032 China
| | - Jing Wang
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou 310032 China
| | - Ying-yao Zhu
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou 310032 China
| | - Jun Chen
- College of Pharmaceutical Sciences; Zhejiang University of Technology; Hangzhou 310032 China
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Robin MP, Mabire AB, Damborsky JC, Thom ES, Winzer-Serhan UH, Raymond JE, O’Reilly RK. New Functional Handle for Use as a Self-Reporting Contrast and Delivery Agent in Nanomedicine. J Am Chem Soc 2013; 135:9518-24. [DOI: 10.1021/ja403587c] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Mathew P. Robin
- Department of Chemistry, University of Warwick, Library Road, Coventry CV4 7AL,
United Kingdom
| | - Anne B. Mabire
- Department of Chemistry, University of Warwick, Library Road, Coventry CV4 7AL,
United Kingdom
| | - Joanne C. Damborsky
- Department of Neuroscience and Experimental Therapeutics, College of Medicine, Health Sciences Center, Texas A&M University System, Bryan, Texas 77807, United States
| | - Elizabeth S. Thom
- Department of Neuroscience and Experimental Therapeutics, College of Medicine, Health Sciences Center, Texas A&M University System, Bryan, Texas 77807, United States
| | - Ursula H. Winzer-Serhan
- Department of Neuroscience and Experimental Therapeutics, College of Medicine, Health Sciences Center, Texas A&M University System, Bryan, Texas 77807, United States
| | | | - Rachel K. O’Reilly
- Department of Chemistry, University of Warwick, Library Road, Coventry CV4 7AL,
United Kingdom
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29
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Binding affinity between dietary polyphenols and β-lactoglobulin negatively correlates with the protein susceptibility to digestion and total antioxidant activity of complexes formed. Food Chem 2013. [DOI: 10.1016/j.foodchem.2012.09.040] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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30
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Protti S, Mezzetti A. Any colour you like. Excited state and ground state proton transfer in flavonols and applications. PHOTOCHEMISTRY 2012. [DOI: 10.1039/9781849734882-00295] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The photoinduced and ground state proton transfer processes occurring in flavonols are responsible for their multi-wavelength emission. This peculiar behavior has touched on a wide range of research areas, ranging from biology to chemistry of materials leading, among others, to the development of fluorescent probes for physical and biophysical parameters, laser dyes, and wavelentgh shifting devices. This account aims to be a brief introduction to the multi-faceted applications of flavonols.
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Affiliation(s)
- Stefano Protti
- PhotoGreen Lab Department of Chemistry University of Pavia, V.Le Taramelli 12, 27100 Pavia Italy
| | - Alberto Mezzetti
- Laboratoire de Photocatalyse et BiohydrogèneSB2SM, CNRS URA 2096, CEA-Saclay, DSV/iBiTecS, 91191 Gif-sur-Yvette cedexFrance
- Laboratoire de Spectrochimie Infrarouge et Raman UMR CNRS 8516Université de Sciences et Technologies de Lille, Bat. C5, Cité Scientifique, 59655, Villeneuve d’AscqFrance
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31
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Tang J, Yang C, Zhou L, Ma F, Liu S, Wei S, Zhou J, Zhou Y. Studies on the binding behavior of prodigiosin with bovine hemoglobin by multi-spectroscopic techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:461-467. [PMID: 22728237 DOI: 10.1016/j.saa.2012.05.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 05/17/2012] [Accepted: 05/26/2012] [Indexed: 06/01/2023]
Abstract
In this article, the interaction mechanism of prodigiosin (PG) with bovine hemoglobin (BHb) is studied in detail using various spectroscopic technologies. UV-vis absorption and fluorescence spectra demonstrate the interaction process. The Stern-Volmer plot and the time-resolved fluorescence study suggest the quenching mechanism of fluorescence of BHb by PG is a static quenching procedure, and the hydrophobic interactions play a major role in binding of PG to BHb. Furthermore, synchronous fluorescence studies, Fourier transform infrared (FTIR) and circular dichroism (CD) spectra reveal that the conformation of BHb is changed after conjugation with PG.
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Affiliation(s)
- Jing Tang
- College of Chemistry and Materials Science, Analysis and Testing Center, Jiangsu Key Laboratory of Biofunctional Materials, Nanjing Normal University, Nanjing 210046, PR China
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Investigations on the binding of human hemoglobin with orange I and orange II. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2012; 113:14-21. [DOI: 10.1016/j.jphotobiol.2012.04.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2011] [Revised: 04/12/2012] [Accepted: 04/18/2012] [Indexed: 11/21/2022]
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Chakraborty S, Chaudhuri S, Pahari B, Taylor J, Sengupta PK, Sengupta B. A CRITICAL STUDY ON THE INTERACTIONS OF HESPERITIN WITH HUMAN HEMOGLOBIN: FLUORESCENCE SPECTROSCOPIC AND MOLECULAR MODELING APPROACH. JOURNAL OF LUMINESCENCE 2012; 132:1522-1528. [PMID: 22543928 PMCID: PMC3337693 DOI: 10.1016/j.jlumin.2012.01.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Hesperitin, a ubiquitous bioactive flavonoid abundant in citrus fruits is known to possess antioxidant, anti-carcinogenic, hypolipidemic, vasoprotective and other important therapeutic properties. Here we have explored the interactions of hesperitin with normal human hemoglobin (HbA), using steady state and time resolved fluorescence spectroscopy, far UV circular dicroism (CD) spectroscopy, combined with molecular modeling computations. Specific interaction of the flavonoid with HbA is confirmed from flavonoid-induced static quenching which is evident from steady state fluorescence as well as lifetime data. Both temperature dependent fluorescence measurements and molecular docking studies reveal that apart from hydrogen bonding and van der Waals interactions, electrostatic interactions also play crucial role in hesperitin-HbA interactions. Furthermore, electrostatic surface potential calculations indicate that the hesperitin binding site in HbA is intensely positive due to the presence of several lysine and histidine residues.
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Affiliation(s)
| | - Sudip Chaudhuri
- Biophysics Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - Biswapathik Pahari
- Biophysics Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - Jasmine Taylor
- Chemistry Department, Tougaloo College, Tougaloo, MS 39174, U.S.A
| | - Pradeep K. Sengupta
- Biophysics Division, Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - Bidisha Sengupta
- Chemistry Department, Tougaloo College, Tougaloo, MS 39174, U.S.A
- Corresponding author: Bidisha Sengupta, Chemistry Department, Tougaloo College, Tougaloo, MS 39174, U.S.A. , (FAX: 001-601-977-7898)
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Matei I, Ionescu S, Hillebrand M. Induced chirality in fisetin upon binding to serum albumin: experimental circular dichroism and TDDFT calculations. J Mol Model 2012; 18:4381-7. [DOI: 10.1007/s00894-012-1444-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Accepted: 04/19/2012] [Indexed: 11/30/2022]
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Pahari B, Chakraborty S, Chaudhuri S, Sengupta B, Sengupta PK. Binding and antioxidant properties of therapeutically important plant flavonoids in biomembranes: Insights from spectroscopic and quantum chemical studies. Chem Phys Lipids 2012; 165:488-96. [DOI: 10.1016/j.chemphyslip.2011.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 10/17/2011] [Accepted: 10/19/2011] [Indexed: 11/25/2022]
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36
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Ding F, Liu W, Sun Y, Yang XL, Sun Y, Zhang L. Analysis of conjugation of chloramphenicol and hemoglobin by fluorescence, circular dichroism and molecular modeling. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2011.10.022] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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37
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Arshadi S, Bekhradnia A, Ebrahimnejad A. Feasibility study of hydrogen-bonded nucleic acid base pairs in gas and water phases — A theoretical study. CAN J CHEM 2011. [DOI: 10.1139/v11-124] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
To investigate the base pair binding probabilities for nucleic acid bases, numerous models were studied for contacts between adenine, thymine, guanine, cytosine, and uracil using density functional theory (DFT) in combination with the 6–311G* basis set. We obtained an assessment for the energy given by our calculations in gas and aqueous phases, which showed that it should be incorporated into hydrogen bonding and propeller rotational energies. The 42 complexes of base pairs (5 regular and 37 irregular base pairs) were proposed and their hydrogen-bonding (H-bonding) properties were verified. The hydrogen bonds in some irregular base pairs, including CC, UU, and TT (series 1), were stronger than in regular GC and AT base pairs. Also, the strength of the hydrogen bonds in the proposed base pairs, including CU, GG, GU, and TU (series 2), were similar to regular base pairs from an energetic point of view. The propeller rotations revealed a higher rotational barrier energy (6–7.5 kcal/mol; 1 cal = 4.184 J) for irregular base pairs (series 1 and 2) than regular GC and AT ones (1–3 kcal/mol). Nevertheless, the trend in these affinities of the complex contact probabilities and their biological properties were confirmed by our calculations.
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Affiliation(s)
- S. Arshadi
- Department of Chemistry, Payame Noor University, 1935-4697, I.R. of Iran
| | - A.R. Bekhradnia
- Pharmaceutical Sciences Research Center, Department of Medicinal Chemistry, Mazandaran University of Medical Sciences, Sari, Iran
| | - A. Ebrahimnejad
- Department of Chemistry, Payame Noor University, 1935-4697, I.R. of Iran
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