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Agarwala P, Ghosh A, Hazarika P, Acharjee D, Ghosh S, Rout D, Sasmal DK. Unraveling the Interaction of Diflunisal with Cyclodextrin and Lysozyme by Fluorescence Spectroscopy. J Phys Chem B 2023; 127:9710-9723. [PMID: 37917720 DOI: 10.1021/acs.jpcb.3c04295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Understanding the interaction between the drug:carrier complex and protein is essential for the development of a new drug-delivery system. However, the majority of reports are based on an understanding of interactions between the drug and protein. Here, we present our findings on the interaction of the anti-inflammatory drug diflunisal with the drug carrier cyclodextrin (CD) and the protein lysozyme, utilizing steady-state and time-resolved fluorescence spectroscopy. Our findings reveal a different pattern of molecular interaction between the inclusion complex of β-CD (β-CD) or hydroxypropyl-β-CD (HP-β-CD) (as the host) and diflunisal (as the guest) in the presence of protein lysozyme. The quantum yield for the 1:2 guest:host complex is twice that of the 1:1 guest:host complex, indicating a more stable hydrophobic microenvironment created in the 1:2 complex. Consequently, the nonradiative decay pathway is significantly reduced. The interaction is characterized by ultrafast solvation dynamics and time-resolved fluorescence resonance energy transfer. The solvation dynamics of the lysozyme becomes 10% faster under the condition of binding with the drug, indicating a negligible change in the polar environment after binding. In addition, the fluorescence lifetime of diflunisal (acceptor) is increased by 50% in the presence of the lysozyme (donor), which indicates that the drug molecule is bound to the binding pocket on the surface of the protein, and the average distance between active tryptophan in the hydrophobic region and diflunisal is calculated to be approximately 50 Å. Excitation and emission matrix spectroscopy reveals that the tryptophan emission increases 3-5 times in the presence of both diflunisal and CD. This indicates that the tryptophan of lysozyme may be present in a more hydrophobic environment in the presence of both diflunisal and CD. Our observations on the interaction of diflunisal with β-CD and lysozyme are well supported by molecular dynamics simulation. Results from this study may have an impact on the development of a better drug-delivery system in the future. It also reveals a fundamental molecular mechanism of interaction of the drug-carrier complex with the protein.
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Affiliation(s)
- Pratibha Agarwala
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Arabinda Ghosh
- Department of Computational Biology and Biotechnology, Mahapurusha Srimanta Sankaradeva Viswavidyalaya, Guwahati Unit, Guwahati, Assam 781032, India
| | - Priyanka Hazarika
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha 752050, India
| | - Shirsendu Ghosh
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), Hyderabad Campus, Hyderabad 502329, India
| | - Debasish Rout
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Dibyendu K Sasmal
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
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Parveen S, Ali MS, Al-Lohedan HA, Hoti N, Tabassum S. Molecular interaction of lysozyme with therapeutic drug azithromycin: Effect of sodium dodecyl sulfate on binding profile. Int J Biol Macromol 2023; 242:124844. [PMID: 37210056 DOI: 10.1016/j.ijbiomac.2023.124844] [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: 01/11/2023] [Revised: 05/08/2023] [Accepted: 05/09/2023] [Indexed: 05/22/2023]
Abstract
This paper describes an inclusive biophysical study elucidating the interaction of therapeutic drug azithromycin (Azith) with hen egg white lysozyme (HEWL). Spectroscopic and computational tools have been employed to study the interaction of Azith with HEWL at pH 7.4. The fluorescence quenching constant values (Ksv) exhibited a decrease with the increase in temperature which revealed the occurrence of static quenching mechanism between Azith and HEWL. The thermodynamic data demonstrated that hydrophobic interactions were predominantly involved in the Azith-HEWL interaction. The negative value of standard Gibbs free energy (ΔG°) stated that the Azith-HEWL complex formed via spontaneous molecular interactions. The effect of sodium dodecyl sulfate (SDS) surfactant monomers on the binding propensity of Azith with HEWL was insignificant at lower concentrations however the binding significantly decreased at increased concentrations of the former. Far-UV CD data revealed alteration in the secondary structure of HEWL in the presence of Azith and the overall HEWL conformation changed. Molecular docking results revealed that the binding of Azith with HEWL takes place through hydrophobic interactions and hydrogen bonds.
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Affiliation(s)
- Sabiha Parveen
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Mohd Sajid Ali
- Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, the Kingdom of Saudi Arabia
| | - Hamad A Al-Lohedan
- Department of Chemistry, College of Sciences, King Saud University, Riyadh 11451, the Kingdom of Saudi Arabia
| | | | - Sartaj Tabassum
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India.
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Delbue S, Pariani E, Parapini S, Galli C, Basilico N, D'Alessandro S, Pellegrino S, Pini E, Ciceri S, Ferraboschi P, Grisenti P. Heat-Treated Lysozyme Hydrochloride: A Study on Its Structural Modifications and Anti-SARS-CoV-2 Activity. Molecules 2023; 28:molecules28062848. [PMID: 36985820 PMCID: PMC10054570 DOI: 10.3390/molecules28062848] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 03/30/2023] Open
Abstract
Lysozyme (E.C. 3.2.1.17), an about 14 kDa protein and pI 11, widely spread in nature, is present in humans mainly in milk, saliva, and intestinal mucus as a part of innate defense mechanisms. It is endowed with antimicrobial activity due to its action as an N-acetylmuramidase, cleaving the 1-4β glycosidic linkage in the peptidoglycan layer of Gram-positive bacteria. This antimicrobial activity is exerted only against a limited number of Gram-negative bacteria. Different action mechanisms are proposed to explain its activity against Gram-negative bacteria, viruses, and fungi. The antiviral activity prompted the study of a possible application of lysozyme in the treatment of SARS-CoV-2 infections. Among the different sources of lysozyme, the chicken egg albumen was chosen, being the richest source of this protein (c-type lysozyme, 129 amino acids). Interestingly, the activity of lysozyme hydrochloride against SARS-CoV-2 was related to the heating (to about 100 °C) of this molecule. A chemical-physical characterization was required to investigate the possible modifications of native lysozyme hydrochloride by heat treatment. The FTIR analysis of the two preparations of lysozyme hydrochloride showed appreciable differences in the secondary structure of the two protein chains. HPLC and NMR analyses, as well as the enzymatic activity determination, did not show significant modifications.
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Affiliation(s)
- Serena Delbue
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Elena Pariani
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy
| | - Silvia Parapini
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy
| | - Cristina Galli
- Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy
| | - Nicoletta Basilico
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Sarah D'Alessandro
- Department of Pharmacological and Biomedical Sciences, Università degli Studi di Milano, 20133 Milan, Italy
| | - Sara Pellegrino
- Department of Pharmaceutical Sciences, General and Organic Chemistry Section "Alessandro Marchesini", University of Milan, 20133 Milan, Italy
| | - Elena Pini
- Department of Pharmaceutical Sciences, General and Organic Chemistry Section "Alessandro Marchesini", University of Milan, 20133 Milan, Italy
| | - Samuele Ciceri
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milan, Italy
| | - Patrizia Ferraboschi
- Department of Medical Biotechnology and Translational Medicine, Università degli Studi di Milano, Via Saldini 50, 20133 Milan, Italy
| | - Paride Grisenti
- Bioseutica, Landbouwweg 83, 3899 BD Zeewolde, The Netherlands
- Bioseutica, Corso Elvezia 4, 6900 Lugano, Switzerland
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Huo C, Zhao Q, Liu R, Li X, He F, Jing M, Wan J, Zong W. Cytotoxicity and Oxidative Stress Effects of Indene on Coelomocytes of Earthworm ( Eisenia foetida): Combined Analysis at Cellular and Molecular Levels. TOXICS 2023; 11:136. [PMID: 36851011 PMCID: PMC9961689 DOI: 10.3390/toxics11020136] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 01/24/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Indene (IND) is a kind of important aromatic hydrocarbon that is extracted from coal tar and has important applications in industry and biology. In the process of production and utilization, it is easy to enter the soil and produce toxic effects on the soil or organisms. The earthworm is an important organism in the soil. The toxicity of indene on earthworm coelomocytes is rarely studied, and the oxidative stress effects of IND on earthworm coelomocytes remain unclear. In this study, coelomocytes from earthworms and antioxidant enzymes were selected as the research targets. In addition, IND caused oxidative stress, and its related toxic effects and mechanisms were systematically studied and evaluated at the cellular and molecular levels. The results showed that IND destroyed the redox balance in earthworm coelomocytes, and the large accumulation of reactive oxygen species (ROS) significantly inhibited the activities of the antioxidant system, including superoxide dismutase (SOD), catalase (CAT), and glutathione (GSH), and caused lipid peroxidation and membrane permeability changes, resulting in a decrease in cell viability to 74.5% of the control group. At the molecular level, IND was bound to SOD by the arene-H bond, and the binding constant was 4.95 × 103. IND changed the secondary structure of the SOD and led to a loosening of the structure of the SOD peptide chain. Meanwhile, IND caused SOD fluorescence sensitization, and molecular simulation showed that IND was mainly bound to the junction of SOD subunits. We hypothesized that the changes in SOD structure led to the increase in SOD activity. This research can provide a scientific basis for IND toxicity evaluation.
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Affiliation(s)
- Chengqian Huo
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Qiang Zhao
- Shandong Provincial Eco-Environment Monitoring Center, 3377 Jingshi Dong Lu, Jinan 250100, China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Xiangxiang Li
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Falin He
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Mingyang Jing
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Jingqiang Wan
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, 72# Jimo Binhai Road, Qingdao 266237, China
| | - Wansong Zong
- College of Population, Resources and Environment, Shandong Normal University, 88# East Wenhua Road, Jinan 250014, China
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Jia D, Miao W, Huang M, Huang X, Yi Z. Investigations on the binding properties of hydroxylated polybrominated diphenyl ethers with lysozyme using the multispectral techniques and molecular modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121864. [PMID: 36137501 DOI: 10.1016/j.saa.2022.121864] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/23/2022] [Accepted: 09/05/2022] [Indexed: 06/16/2023]
Abstract
As a kind of phenolic chemical with endocrine disrupting potency, hydroxylated polybrominated diphenyl ethers (OH-PBDEs) cause a latent threat to human health from their residue in the environment. Their binding efficiency with lysozyme (LYSO) was studied by molecular simulation combined with fluorescence, UV-vis absorption and circular dichroism (CD), so as to assess their toxicity at the molecular level. Molecular docking data indicate that van der Waals force is the principal interaction force between OH-PBDEs and LYSO. The binding site for 5'-OH-BDE-25 in LYSO is ascertained as the active site, which interaction with the TRP63 and TRP108 residues of LYSO to take shape a strong face-to-face stacked rank (F-shaped). Both 4'-OH-BDE-99 and 3'-OH-BDE-154 display a certain degree of deviation from the active site. Nevertheless, their F-shaped interaction with TRP63 conduce to bind LYSO and stabilize the docking conformation. Combined with dynamics simulation and spectral analysis, the secondary structure of LYSO can be induced by the three kinds of OH-PBDEs. CD spectrum shows that the combination of LYSO and OH-PBDEs will make α- Helix content increased. The combination of OH-PBDEs and LYSO touch upon a static quenching mechanism as a result of steady state fluorescence. The energy decomposition analysis exhibited that LYSO-OH-PBDEs binding site was stable by van der Waals and hydrophobic interaction. As enzyme activity experiments demonstrate that OH-PBDEs can inhibit the activity of LYSO, which is helpful to clarify the molecular toxicity mechanism of OH-PBDEs.
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Affiliation(s)
- Dan Jia
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Wangli Miao
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Muwei Huang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Xiaomei Huang
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Zhongsheng Yi
- College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
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Lyndem S, Gazi R, Belwal VK, Bhatta A, Jana M, Roy AS. Binding of bioactive esculin and esculetin with hen egg white lysozyme: Spectroscopic and computational methods to comprehensively elucidate the binding affinities, interacting forces, and conformational alterations at molecular level. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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7
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Ni X, Zhang M, Zhang J, Zhang Z, Dong S, Zhao L. Molecular mechanism of two functional protein structure changes under 2,3-butanedione-induced oxidative stress and apoptosis effects in the hepatocytes. Int J Biol Macromol 2022; 218:969-980. [PMID: 35907461 DOI: 10.1016/j.ijbiomac.2022.07.171] [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: 04/27/2022] [Revised: 07/21/2022] [Accepted: 07/21/2022] [Indexed: 11/24/2022]
Abstract
Food security has become closely watched with the occurrence of a series of food safety incidents in recent years. The widespread adoption of 2,3-butanedione (BUT), as a food additive, is an unpreventable significant risk factor to food security. Based on this, mouse hepatocyte AML-12 cells and two functional proteins (bovine serum albumin and lysozyme) were utilized as targeted receptors to study the adverse effects of BUT at the cellular and molecular levels. Results suggested that BUT could disrupt the redox balance of AML-12 cells, reducing glutathione (GSH) activity fell to 87.18 %, which cannot offset the production of reactive oxygen species (ROS). Meanwhile, the increasement of lipid peroxidation and malondialdehyde (MDA) levels were observed. The mitochondrial membrane function was also abnormal due to the excessive accumulation of ROS and eventually leads to cell apoptosis and death. At the molecular level, the exposure of BUT could alter the skeleton and secondary structure of bovine serum albumin (BSA) and lysozyme (LYZ), and it could statically quench the intrinsic fluorescence of proteins. The combined experiments confirmed proved the potentially toxic effects of BUT accumulation on the detoxification organ, providing theoretical support for the liver diseases caused by BUT exposure, and a reference for the risk assessment of occupational exposure of BUT.
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Affiliation(s)
- Xinyu Ni
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, PR China
| | - Miao Zhang
- College of Chemistry & Environmental Science, Hebei University, Baoding, Hebei 071002, PR China
| | - Jing Zhang
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, PR China
| | - Zhen Zhang
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, PR China
| | - Sijun Dong
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, PR China.
| | - Lining Zhao
- College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, PR China.
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8
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Rial R, González-Durruthy M, Liu Z, Ruso JM. Conformational binding mechanism of lysozyme induced by interactions with penicillin antibiotic drugs. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Kaur N, Kaur G, Kaur H, Chaudhary GR. Comparative scrutinize of BSA and HEWL in the vicinity of metallo-catanionic aggregates derived from single chain metallosurfactant and anionic surfactant. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117818] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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10
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Basu A, Mahammad A, Das A. Inhibition of the formation of lysozyme fibrillar assemblies by the isoquinoline alkaloid coralyne. NEW J CHEM 2022. [DOI: 10.1039/d1nj06007d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The isoquinoline alkaloid coralyne can efficiently attenuate fibrillogenesis in lysozyme.
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Affiliation(s)
- Anirban Basu
- Department of Chemistry, Vidyasagar University, Midnapore 721 102, India
| | - Adil Mahammad
- Department of Chemistry, Vidyasagar University, Midnapore 721 102, India
| | - Arindam Das
- Department of Chemistry, Vidyasagar University, Midnapore 721 102, India
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Cheng-Ming Y, Ning-Qiu L, Li-Chao R, Zhe W, Lian-Qin C, Jiang-Feng L. Identification and characterization of two highly homologous lysozymes from red swamp crayfish, Procambarus clarkii. FISH AND SHELLFISH IMMUNOLOGY REPORTS 2021; 2:100017. [PMID: 36420494 PMCID: PMC9680052 DOI: 10.1016/j.fsirep.2021.100017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/02/2021] [Accepted: 07/01/2021] [Indexed: 12/03/2022] Open
Abstract
Lysozyme is an important immune effector in innate immunity against pathogen infection. But the study on the active region of lysozyme is limited. In this study, two highly homologous lysozymes were identified from crayfish (designated as PcLysi4 and PcLysi5). The molecular structures of PcLysi4 and PcLysi5 were predicted by SWISS-MODEL with the structure of lysozyme (PDB accession No. 4PJ2.2.B) as model. The results suggested that the structure of PcLysi4 and PcLysi5 were highly similar, but there were more α-helices at positions (127–139) and longer β-sheet at positions (49–57) in the structure of PcLysi5 than in that of PcLysi4. The antibacterial and antiviral functions of the two lysozymes were investigated. PcLysi4 and PcLysi5 could promote the bacterial clearance ability of crayfish, and increase the survival rate of Vibrio-infected crayfish. Further study showed that PcLysi5 inhibited WSSV replication, and enhanced the survival rate of WSSV-infected crayfish. There was no evidence that PcLysi4 has an influence on WSSV replication. Furthermore, PcLysi5 was detected to interact with envelope protein VP24 of WSSV. Our results would provide a new reference for the study on active region of lysozyme.
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Affiliation(s)
- Yin Cheng-Ming
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Li Ning-Qiu
- Pearl River Fishery Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangzhou 510380, China
| | - Ren Li-Chao
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
| | - Wang Zhe
- State Key Laboratory of Cotton Biology, School of Life Sciences Henan University, Kaifeng 475004, China
| | - Chai Lian-Qin
- State Key Laboratory of Cotton Biology, School of Life Sciences Henan University, Kaifeng 475004, China
- School of Life Sciences Henan University, Kaifeng 475004, China.
| | - Lan Jiang-Feng
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271018, China
- Corresponding authors at: Shandong Agricultural University, Taian 271018, China.
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Characterization of Conjugates between α-Lactalbumin and Benzyl Isothiocyanate-Effects on Molecular Structure and Proteolytic Stability. Molecules 2021; 26:molecules26206247. [PMID: 34684828 PMCID: PMC8539348 DOI: 10.3390/molecules26206247] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/12/2021] [Accepted: 10/12/2021] [Indexed: 11/27/2022] Open
Abstract
In complex foods, bioactive secondary plant metabolites (SPM) can bind to food proteins. Especially when being covalently bound, such modifications can alter the structure and, thus, the functional and biological properties of the proteins. Additionally, the bioactivity of the SPM can be affected as well. Consequently, knowledge of the influence of chemical modifications on these properties is particularly important for food processing, food safety, and nutritional physiology. As a model, the molecular structure of conjugates between the bioactive metabolite benzyl isothiocyanate (BITC, a hydrolysis product of the glucosinolate glucotropaeolin) and the whey protein α-lactalbumin (α-LA) was investigated using circular dichroism spectroscopy, anilino-1-naphthalenesulfonic acid fluorescence, and dynamic light scattering. Free amino groups were determined before and after the BITC conjugation. Finally, mass spectrometric analysis of the BITC-α-LA protein hydrolysates was performed. As a result of the chemical modifications, a change in the secondary structure of α-LA and an increase in surface hydrophobicity and hydrodynamic radii were documented. BITC modification at the ε-amino group of certain lysine side chains inhibited tryptic hydrolysis. Furthermore, two BITC-modified amino acids were identified, located at two lysine side chains (K32 and K113) in the amino acid sequence of α-LA.
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Islam S, Mukhopadhyay C. Aggregation of Lysozyme in the Presence of a Mixed Bilayer of POPC and POPG. ACS OMEGA 2021; 6:17861-17869. [PMID: 34308021 PMCID: PMC8295997 DOI: 10.1021/acsomega.1c01145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/30/2021] [Indexed: 05/04/2023]
Abstract
Understanding the molecular mechanisms by which amyloidogenic proteins interact with membranes is a challenging task. Amyloid accumulates from many human diseases have been observed to contain membrane lipids. In this work, coarse-grained molecular dynamics simulations have been used to inspect hen egg white lysozyme (HEWL) aggregation and membrane association in the presence of a pure POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine) bilayer and a POPC and POPG (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylglycerol) mixed bilayer. It was observed that, in both cases, two HEWLs formed aggregates. In the presence of a mixed bilayer, after aggregation, the aggregated system started to interact with the membrane. It has been found that one of the lysozymes which came closer to the mixed bilayer unfolded more. The process of the initial insertion of an aggregated system in the mixed bilayer has been analyzed. The structural rearrangements of the protein and lipids were analyzed as well along the course of the simulation. Although with a pure POPC bilayer, aggregation was observed, the aggregated system moved away from the membrane. We believe that our study will provide considerable insights into lysozyme aggregation in the presence of a membrane environment.
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Affiliation(s)
- Shahee Islam
- Department of Chemistry, University
of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
| | - Chaitali Mukhopadhyay
- Department of Chemistry, University
of Calcutta, 92, A. P. C. Road, Kolkata 700009, India
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14
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Pramanik U, Kongasseri AA, Shekhar S, Mathew A, Yadav R, Mukherjee S. Structural Compactness in Hen Egg White Lysozyme Induced by Bisphenol S: A Spectroscopic and Molecular Dynamics Simulation Approach. Chemphyschem 2021; 22:1745-1753. [PMID: 34227204 DOI: 10.1002/cphc.202100272] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 06/15/2021] [Indexed: 12/24/2022]
Abstract
The endocrine disrupting compound Bisphenol and its analogues are widely used in food packaging products and can cause serious health hazards. The protein, Lysozyme (Lyz), showing anti-microbial properties, is used as a "natural" food and dairy preservative. Herein, we explored the interaction between Lyz and Bisphenol S (BPS) by multi-spectroscopic and theoretical approaches. Lyz interacts with BPS through static quenching, where hydrophobic force governed the underlying interaction. Molecular docking results reveal that tryptophan plays a vital role in binding, corroborated well with near UV-CD studies. A decrease in the radius of gyration (from 1.43 nm to 1.35 nm) of Lyz substantiates the compactness of the protein conformation owing to such an interaction. This structural alteration experienced by Lyz may alter its functional properties as a food preservative. Consequently, this can degrade the quality of the food products and thereby lead to severe health issues.
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Affiliation(s)
- Ushasi Pramanik
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Anju Ajayan Kongasseri
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Shashi Shekhar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Ashwin Mathew
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Rahul Yadav
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhopal, 462 066, Madhya Pradesh, India
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15
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Pavani P, Kumar K, Rani A, Venkatesu P, Lee MJ. The influence of sodium phosphate buffer on the stability of various proteins: Insights into protein-buffer interactions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115753] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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16
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Khamari L, Pramanik U, Shekhar S, Mohanakumar S, Mukherjee S. Thermal Reversibility and Structural Stability in Lysozyme Induced by Epirubicin Hydrochloride. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3456-3466. [PMID: 33703900 DOI: 10.1021/acs.langmuir.1c00179] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Herein we report the binding interactions between lysozyme (Lyz) and an anthracycline drug, epirubicin hydrochloride (EPR), through an extensive spectroscopic approach at both ensemble average and single molecular resolution. Our steady-state and time-resolved fluorescence spectroscopy reveals that the drug-induced fluorescence quenching of the protein proceeds through a static quenching mechanism. Isothermal titration calorimetry (ITC) and steady-state experiments reveal almost similar thermodynamic signatures of the drug-protein interactions. The underlying force that plays pivotal roles in the said interaction is hydrophobic in nature, which is enhanced in the presence of a strong electrolyte (NaCl). Circular dichroism (CD) spectra indicate that there is a marginal increase in the secondary structure of the native protein (α-helical content increases from 26.9 to 31.4% in the presence of 100 μM EPR) upon binding with the drug. Fluorescence correlation spectroscopy (FCS) was used to monitor the changes in structure and conformational dynamics of Lyz upon interaction with EPR. The individual association (Kass = 0.33 × 106 ms-1 M-1) and dissociation (Kdiss = 1.79 ms-1) rate constants and the binding constant (Kb = 1.84 × 105 M-1) values, obtained from fluctuations of fluorescence intensity of the EPR-bound protein, have also been estimated. AutoDock results demonstrate that the drug molecule is encapsulated within the hydrophobic pocket of the protein (in close proximity to both Trp62 and Trp108) and resides ∼20 Å apart from the covalently labelled CPM dye. Förster resonance energy transfer (FRET) studies proved that the distance between the donor (CPM) and the acceptor (EPR) is ∼22 Å, which is very similar to that obtained from molecular docking analysis (∼20 Å). The system also shows temperature-dependent reversible FRET, which may be used as a thermal sensor for the temperature-sensitive biological systems.
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Affiliation(s)
- Laxmikanta Khamari
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426 066, Madhya Pradesh, India
| | - Ushasi Pramanik
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426 066, Madhya Pradesh, India
| | - Shashi Shekhar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426 066, Madhya Pradesh, India
| | - Shilpa Mohanakumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426 066, Madhya Pradesh, India
| | - Saptarshi Mukherjee
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 426 066, Madhya Pradesh, India
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17
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Rui Y, Zuo Y, Yang L, Xu J, Wei Y, Yi Z. Molecular dynamics and spectral analysis for the binding of methoxylated polybrominated diphenyl ethers to lysozyme. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Outstanding protein-repellent feature of soft nanoparticles based on poly(N-(2-hydroxypropyl) methacrylamide) outer shells. J Colloid Interface Sci 2020; 574:260-271. [DOI: 10.1016/j.jcis.2020.04.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/13/2022]
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19
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Roy N, Bomzan P, Nath Roy M. Probing Host-Guest inclusion complexes of Ambroxol Hydrochloride with α- & β-Cyclodextrins by physicochemical contrivance subsequently optimized by molecular modeling simulations. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137372] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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20
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A spectroscopic and computational intervention of interaction of lysozyme with 6-mercaptopurine. Anal Bioanal Chem 2020; 412:2565-2577. [DOI: 10.1007/s00216-020-02483-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 01/09/2020] [Accepted: 02/03/2020] [Indexed: 12/26/2022]
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21
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Kabir A, Jash C, Payghan PV, Ghoshal N, Kumar GS. Polyamines and its analogue modulates amyloid fibrillation in lysozyme: A comparative investigation. Biochim Biophys Acta Gen Subj 2020; 1864:129557. [PMID: 32045632 DOI: 10.1016/j.bbagen.2020.129557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 01/03/2020] [Accepted: 02/07/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Polyamines can induce protein aggregation that can be related to the physiology of the cellular function. Polyamines have been implicated in protein aggregation which may lead to neuropathic and non neuropathic amyloidosis. SCOPE OF REVIEW Change in the level of polyamine concentration has been associated with ageing and neurodegeneration such as Parkinson's disease, Alzheimer's disease. Lysozyme aggregation in the presence of polyamines leads to non neuropathic amyloidosis. Polyamine analogues can suppress or inhibit protein aggregation suggesting their efficacy against amyloidogenic protein aggregates. MAJOR CONCLUSIONS In this study we report the comparative interactions of lysozyme with the polyamine analogue, 1-naphthyl acetyl spermine in comparison with the biogenic polyamines through spectroscopy, calorimetry, imaging and docking techniques. The findings revealed that the affinity of binding varied as spermidine > 1-naphthyl acetyl spermine > spermine. The biogenic polyamines accelerated the rate of fibrillation significantly, whereas the analogue inhibited the rate of fibrillation to a considerable extent. The polyamines bind near the catalytic diad residues viz. Glu35 and Asp52, and in close proximity of Trp62 residue. However, the analogue showed dual nature of interaction where its alkyl amine region bind in same way as the biogenic polyamines bind to the catalytic site, while the naphthyl group makes hydrophobic contacts with Trp62 and Trp63, thereby suggesting its direct influence on fibrillation. GENERAL SIGNIFICANCE This study, thus, potentiates, the development of a polyamine analogue that can perform as an effective inhibitor targeted towards aggregation of amyloidogenic proteins.
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Affiliation(s)
- Ayesha Kabir
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata 700 032, India
| | - Chandrima Jash
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata 700 032, India
| | - Pavan V Payghan
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata 700 032, India
| | - Nanda Ghoshal
- Structural Biology and Bioinformatics Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Organic and Medicinal Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja SC Mullick Road, Kolkata 700 032, India.
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22
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Xu M, Liu G, Li M, Huo M, Zong W, Liu R. Probing the Cell Apoptosis Pathway Induced by Perfluorooctanoic Acid and Perfluorooctane Sulfonate at the Subcellular and Molecular Levels. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:633-641. [PMID: 31891488 DOI: 10.1021/acs.jafc.9b07072] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As typical perfluorinated compounds (PFCs), perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) have been detected in various environmental media and their toxic effects have been extensively studied. Nevertheless, it remains unclear how PFCs cause cell apoptosis in healthy hepatocytes by inducing oxidative stress at the subcellular and molecular levels. In this study, the apoptotic pathways induced by PFOA and PFOS were explored. Besides, the effects of PFCs on the structure and function of lysozyme (LYZ) were investigated. After PFOA and PFOS exposure, the cell membrane and mitochondrial membrane potential were damaged. Further, PFOA and PFOS increased intracellular Ca2+ levels to 174.41 ± 1.70 and 158.91 ± 5.94%, respectively. Ultimately, caspase-3 was activated, causing cell apoptosis. As an indirect antioxidant enzyme, the molecular structure of LYZ was destroyed after interacting with PFOA and PFOS. Both PFOA and PFOS bound to the active center of LYZ, leading to the decrease of LYZ activity to 91.26 ± 0.78 and 76.01 ± 4.86%, respectively. This study demonstrates that PFOA and PFOS inhibit LYZ function, which can reduce the body's ability to resist oxidative stress, and then lead to mitochondria-mediated apoptosis.
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Affiliation(s)
- Mengchen Xu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health , Shandong University , 72# Jimo Binhai Road , Qingdao , Shandong 266237 , P. R. China
| | - Guiliang Liu
- Shandong Institute for Food and Drug Control , 2749# Xinluo Street, High Tech Zone , Jinan City , Shandong Province 250100 , PR China
| | - Meifei Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health , Shandong University , 72# Jimo Binhai Road , Qingdao , Shandong 266237 , P. R. China
| | - Mengling Huo
- School of Environmental Science and Engineering, China-America CRC for Environment & Health , Shandong University , 72# Jimo Binhai Road , Qingdao , Shandong 266237 , P. R. China
| | - Wansong Zong
- College of Population, Resources and Environment , Shandong Normal University , 88# East Wenhua Road , Jinan 250014 , P. R. China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health , Shandong University , 72# Jimo Binhai Road , Qingdao , Shandong 266237 , P. R. China
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23
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Wang L, Li L, Xu N, Sun W, Ding B, Xu W, Li Z. Effect of carboxymethylcellulose on the affinity between lysozyme and liposome monolayers:evidence for its bacteriostatic mechanism. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2019.105263] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Kumari A, Kumari K, Gupta S. Protease Responsive Essential Amino-Acid Based Nanocarriers for Near-Infrared Imaging. Sci Rep 2019; 9:20334. [PMID: 31889129 PMCID: PMC6937316 DOI: 10.1038/s41598-019-56871-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 12/18/2019] [Indexed: 11/09/2022] Open
Abstract
Delivery of the theranostic agents with effective concentration to the desired sites inside the body is a major challenge in disease management. Nanotechnology has gained attention for the delivery of theranostic agents to the targeted location. The use of essential amino-acid based homopolymers for the synthesis of biocompatible and biodegradable nanoparticles (NPs) could serve as a nanocarrier for delivery applications. In this study, poly-l-lysine (PLL) and salts were used to fabricate the NPs for the delivery of exogenous contrast agents. Here, indocyanine green (ICG) was encapsulated within these NPs, and a simple two-step green chemistry-based self-assembly process was used for the fabrication. The morphological and biochemical characterizations confirm the formation of ICG encapsulating spherical PLL NPs with an average diameter of ~225 nm. Further, a detailed study has been carried out to understand the role of constituents in the assembly mechanism of PLL NPs. Our results show a controlled release of the ICG from PLL NPs in the presence of the proteolytic enzyme. In-vitro cellular studies suggest that the PLL NPs were readily taken up by the cells showing their superior delivery efficiency of ICG in comparison to the free-form of the ICG.
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Affiliation(s)
- Anshu Kumari
- Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India
| | - Kalpana Kumari
- Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India
| | - Sharad Gupta
- Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India.
- Metallurgical Engineering and Material Science, Indian Institute of Technology Indore, Simrol, Indore, Madhya Pradesh, 453552, India.
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25
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Bapli A, Gautam RK, Jana R, Seth D. Investigation of Different Prototropic Forms of Biologically Active Flavin Lumichrome in the Presence of Liposome. Photochem Photobiol 2019; 95:1151-1159. [PMID: 30932194 DOI: 10.1111/php.13105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/26/2019] [Indexed: 12/26/2022]
Abstract
Herein, we reported the photophysical behavior of lumichrome (LC), one of the biologically active flavin molecules, in the presence of small unilamellar vesicle of anionic lipid 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC). With the help of different spectroscopic techniques, we have proposed that anionic DMPC liposome interacts with the cationic form LC in ground state and in excited state and modulate the spectral properties of LC. Photophysical study reveals that different prototropic forms of LC are present in DMPC liposome medium. In the presence of DMPC liposome, fluorescence emission properties of LC vary with change in excitation and emission wavelengths. This indicates switch over between different structural forms of LC. From fluorescence lifetime measurements and fluorescence lifetime imaging (FLIM) study, it was revealed that emission decay profile of LC was fitted biexponentially in the presence of liposome. It suggests that in the presence of liposome, more than one form of LC is present. We have constructed the time-resolved area-normalized emission spectra (TRANES) of LC in the liposome and found one isoemissive point. This confirmed that two emissive species of LC are present in liposome. FLIM study and FE-SEM study give an idea about the structural feature of the complex between LC and liposome.
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Affiliation(s)
- Aloke Bapli
- Department of Chemistry, Indian Institute of Technology Patna, Patna, India
| | | | - Rabindranath Jana
- Department of Chemistry, Indian Institute of Technology Patna, Patna, India
| | - Debabrata Seth
- Department of Chemistry, Indian Institute of Technology Patna, Patna, India
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26
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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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27
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Ramalingam S, Le Bourdon G, Pouget E, Scalabre A, Rao JR, Perro A. Adsorption of Proteins on Dual Loaded Silica Nanocapsules. J Phys Chem B 2019; 123:1708-1717. [DOI: 10.1021/acs.jpcb.8b12028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Sathya Ramalingam
- Inorganic and Physical Chemistry Laboratory, Council of Scientific & Industrial Research-Central Leather Research Institute, Adyar, Chennai-6000 20, India
| | - Gwenaelle Le Bourdon
- Institut des Sciences Moléculaires (ISM) - CNRS - Université de Bordeaux - Bordeaux INP, UMR 5255, 351 cours de la libération, 33405 Talence, France
| | - Emilie Pouget
- Chimie et Biologie des Membranes et des Nanoobjets (CBMN), CNRS - Université Bordeaux - Bordeaux INP, UMR 5248, Allée St Hilaire, Bat B14, 33607 Pessac, France
| | - Antoine Scalabre
- Chimie et Biologie des Membranes et des Nanoobjets (CBMN), CNRS - Université Bordeaux - Bordeaux INP, UMR 5248, Allée St Hilaire, Bat B14, 33607 Pessac, France
| | - Jonnalagadda Raghava Rao
- Inorganic and Physical Chemistry Laboratory, Council of Scientific & Industrial Research-Central Leather Research Institute, Adyar, Chennai-6000 20, India
| | - Adeline Perro
- Université de Bordeaux, Bordeaux INP, ISM, UMR 5255, Site ENSCBP, 16 avenue Pey Berland, 33607 Pessac, France
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28
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Characterization of the binding of triprolidine hydrochloride to hen egg white lysozyme by multi-spectroscopic and molecular docking techniques. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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29
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30
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Ansari SS, Yousuf I, Arjmand F, Siddiqi MK, Naqvi S. Exploring the intermolecular interactions and contrasting binding of flufenamic acid with hemoglobin and lysozyme: A biophysical and docking insight. Int J Biol Macromol 2018; 116:1105-1118. [DOI: 10.1016/j.ijbiomac.2018.05.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 04/22/2018] [Accepted: 05/10/2018] [Indexed: 12/13/2022]
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31
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Exploring the effect of 5-Fluorouracil on conformation, stability and activity of lysozyme by combined approach of spectroscopic and theoretical studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 179:23-31. [DOI: 10.1016/j.jphotobiol.2017.12.019] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 12/13/2017] [Accepted: 12/19/2017] [Indexed: 01/03/2023]
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32
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Rudra S, Jana A, Sepay N, Patel BK, Mahapatra A. Characterization of the binding of strychnine with bovine β-lactoglobulin and human lysozyme using spectroscopic, kinetic and molecular docking analysis. NEW J CHEM 2018. [DOI: 10.1039/c8nj00810h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The binding interaction of a well known alkaloid strychnine (STN) with the mammalian milk protein β-lactoglobulin and human lysozyme has been explored by using several spectroscopic techniques along with computational studies.
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Affiliation(s)
- Suparna Rudra
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
| | - Abhisek Jana
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
| | - Nayim Sepay
- Department of Chemistry
- Jadavpur University
- Kolkata 700032
- India
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33
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Spectroscopic Evidence of Phosphorous Heterocycle–DNA Interaction and its Verification by Docking Approach. J Fluoresc 2017; 28:373-380. [DOI: 10.1007/s10895-017-2199-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Accepted: 12/07/2017] [Indexed: 10/18/2022]
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34
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Roy S. Binding affinity of pyrano[3, 2-f]quinoline and DNA: spectroscopic and docking approach. J Biomol Struct Dyn 2017; 36:3869-3877. [PMID: 29113576 DOI: 10.1080/07391102.2017.1402710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The interaction between pyrano[3, 2-f]quinoline (PQ) and calf thymus DNA (CTDNA) using spectroscopic and molecular modeling approach has been presented here. Apparent association constant (1.05×105 L/mol) calculated from UV-vis specta, indicates a moderate complex formation between CTDNA and PQ. The quenching phenomena as obtained from emission spectra of ethidium bromide (EB)-CTDNA by PQ was found to be a dynamic one and the binding constants found to be 8.64, 9.25, 11.17, 12.03 × 104 L/mol at 293, 300, 308, and 315 K. Thermodynamic parameter enthalpy change (ΔH) and entropy change (ΔS), indicates weak force like van der Walls force and hydrogen bonds having the key role in this binding process. The results of circular dichroism (CD) demonstrate that PQ has not induced characteristic changed in CTDNA. Results achieved from UV absorption and fluorescence spectroscopy indicating the binding mode of PQ with DNA seems to be a nonintercalative binding. The theoretical results as originating from molecular modeling showed that PQ possibly will bind into the hydrophobic region of DNA having docking binding energy = -10.03 kcal/mol and the obtained results are in consonance with the inferences obtained from experimental data. This result is important for the better understanding of pharmaceutical aspects of binding affinity of PQ and CTDNA.
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Affiliation(s)
- Swarup Roy
- a Discipline of Physics and MEMS , Indian Institute of Technology Indore , Simrol 453552 , India
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35
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Shanmugaraj K, Umadevi P, Senthilkumar L, Ilanchelian M. Elucidation of Binding Mechanism of Photodynamic Therapeutic Agent Toluidine Blue O with Chicken Egg White Lysozyme by Spectroscopic and Molecular Dynamics Studies. Photochem Photobiol 2017; 93:1043-1056. [DOI: 10.1111/php.12744] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 01/24/2017] [Indexed: 11/30/2022]
Affiliation(s)
| | - Palanivel Umadevi
- Department of Physics; Bharathiar University; Coimbatore Tamil Nadu India
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36
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Millan S, Satish L, Bera K, Susrisweta B, Singh DV, Sahoo H. A Spectroscopic and Molecular Simulation Approach toward the Binding Affinity between Lysozyme and Phenazinium Dyes: An Effect on Protein Conformation. J Phys Chem B 2017; 121:1475-1484. [DOI: 10.1021/acs.jpcb.6b10991] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sabera Millan
- Department
of Chemistry, National Institute of Technology (NIT), Rourkela, Odisha, India
| | - Lakkoji Satish
- Department
of Chemistry, National Institute of Technology (NIT), Rourkela, Odisha, India
| | - Krishnendu Bera
- Department
of Bioinformatics, Central University of South Bihar, Patna, India
| | - B. Susrisweta
- Department
of Chemistry, National Institute of Technology (NIT), Rourkela, Odisha, India
| | - Durg Vijay Singh
- Department
of Bioinformatics, Central University of South Bihar, Patna, India
| | - Harekrushna Sahoo
- Department
of Chemistry, National Institute of Technology (NIT), Rourkela, Odisha, India
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37
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Rakshit S, Moulik SP, Bhattacharya SC. Understanding the effect of size and shape of gold nanomaterials on nanometal surface energy transfer. J Colloid Interface Sci 2016; 491:349-357. [PMID: 28056444 DOI: 10.1016/j.jcis.2016.12.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 12/21/2016] [Accepted: 12/22/2016] [Indexed: 12/30/2022]
Abstract
Gold Nanomaterials (GNMs) interact with fluorophores via electromagnetic coupling under excitation. In this particular work we carried out (to the best of our knowledge for the first time) a comprehensive study of systematic quenching of a blue emitter 2-Anthracene Sulfonate (2-AS) in the presence of gold nanoparticles of different size and shape. We synthesized gold nanomaterials of four different dimensions [nanoparticle (0D), nanorod (1D), nanotriangle (2D) and nanobipyramids (3D)] and realized the underlying effect on the emitting dipole in terms of steady and time resolved fluorescence. Nanometal Surface Energy Transfer (NSET) has already been proved to be the best long range spectroscopic ruler so far. Many attempts have been made to understand the interaction between a fluorescent molecule and gold nanomaterials. But not a single model can interpret alone the interaction phenomena. We have opted three different models to compare the experimental and theoretical data. Due to the presence of size dependent absorptivity and dielectric function, modified CPS-Kuhn model was proved to be the worthiest to comprehend variance of behavior of an emitting dipole in close proximity to nanometal surface by coupling with the image dipole of gold nanomaterials.
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Affiliation(s)
- Soumyadipta Rakshit
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India; Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Satya Priya Moulik
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India; Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Subhash Chandra Bhattacharya
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India; Centre for Surface Science, Department of Chemistry, Jadavpur University, Kolkata 700 032, India.
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Das A, Adhikari C, Chakraborty A. Lipoplex-Mediated Deintercalation of Doxorubicin from Calf Thymus DNA-Doxorubicin Complex. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:8889-8899. [PMID: 27465781 DOI: 10.1021/acs.langmuir.6b01860] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this paper, we report the lipoplex-mediated deintercalation of anticancer drug doxorubicin (DOX) from the DOX-DNA complex under controlled experimental conditions. We used three zwitterionic liposomes, namely, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and 2-oleoyl-1-palmitoyl-sn-glycero-3-phosphocholine (POPC), which are widely different in their phase transition temperatures to form a lipoplex with calf thymus DNA in the presence of Ca(2+) ions. The study revealed that DPPC being in sol-gel phase was more effective in releasing the drug from the DOX-DNA complex compared with liposomes that remain in liquid crystalline phase (DMPC and POPC). The higher extent of drug release in the case of DPPC liposomes was attributed to the stronger lipoplex formation with DNA as compared with that of other liposomes. Owing to the relatively smaller head group area, the DPPC liposomes in their sol-gel phase can absorb a larger number of Ca(2+) ions and hence offer a strong electrostatic interaction with DNA. This interaction was confirmed by time-resolved anisotropy and circular dichroism spectroscopy. Apart from the electrostatic interaction, the possible hydrophobic interaction between the liposomes and DNA was also taken into account for the observed deintercalation. The successful uptake of drug molecules by liposomes from the drug-DNA complex in the post-release period was also confirmed using confocal laser scanning microscopy (CLSM).
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Affiliation(s)
- Anupam Das
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
| | - Chandan Adhikari
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
| | - Anjan Chakraborty
- Discipline of Chemistry, Indian Institute of Technology Indore , Indore 453552, Madhya Pradesh, India
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Han R, Liu B, Li G, Zhang Q. Investigation on the interaction of cefpirome sulfate with lysozyme by fluorescence quenching spectroscopy and synchronous fluorescence spectroscopy. LUMINESCENCE 2016; 31:580-586. [PMID: 26304690 DOI: 10.1002/bio.2998] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/09/2015] [Accepted: 07/10/2015] [Indexed: 12/16/2023]
Abstract
The reaction mechanism of cefpirome sulfate with lysozyme at different temperatures (298, 310 and 318 K) was investigated using fluorescence quenching and synchronous fluorescence spectroscopy under simulated physiological conditions. The results clearly demonstrated that cefpirome sulfate caused strong quenching of the fluorescence of lysozyme by a static quenching mechanism. The binding constants obtained using the above methods were of the same order of magnitude and very similar. Static electric forces played a key role in the interaction between cefpirome sulfate and lysozyme, and the number of binding sites in the interaction was close to 1. The values of Hill's coefficients were > 1, indicating that drugs or proteins showed a very weakly positive cooperativity in the system. In addition, the conclusions obtained from the two methods using the same equation were consistent. The results indicated that synchronous fluorescence spectrometry could be used to study the binding mechanism between drug and protein, and was a useful supplement to the fluorescence quenching method. In addition, the effect of cefpirome sulfate on the secondary structure of lysozyme was analyzed using circular dichroism spectroscopy.
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Affiliation(s)
- Rong Han
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Baosheng Liu
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Gaixia Li
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
| | - Qiuju Zhang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry & Enviro nmental Science, Hebei University, Baoding, People's Republic of China
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40
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Tian L, Hu X, Liu Z, Liu S. Studies on the interaction of heparin with lysozyme by multi-spectroscopic techniques and atomic force microscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 154:27-32. [PMID: 26505285 DOI: 10.1016/j.saa.2015.09.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 08/01/2015] [Accepted: 09/27/2015] [Indexed: 06/05/2023]
Abstract
The interaction between heparin (Hep) and lysozyme (Lyso) in vitro was studied by fluorescence, UV-vis, circular dichroism (CD), resonance Rayleigh scattering (RRS) spectroscopy and atomic force microscopy (AFM) under normal physiological conditions. UV-vis spectra of Lyso showed the absorbance was significantly increased with the addition of Hep. Fluorescence studies revealed that the emission quenching of Lyso with Hep was initiated by static quenching mechanism. CD spectral studies showed that Hep induced conformational changes in the secondary structure of Lyso. RRS spectra of Lyso showed the intensity of scattering was significantly increased with the addition of Hep and the enhanced RRS intensities were proportional to the concentration of Hep in a certain range. Thus, a new RRS method using Lyso as a probe could be used for the determination of Hep. The detection limit for Hep was 3.9 ng mL(-1). In addition, the shape of the complex was characterized by AFM. The possible reaction mechanism and the reasons for the enhancement of RRS intensity had been discussed through experimental results.
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Affiliation(s)
- Lunfu Tian
- Institute of Mechanical Manufacturing Technology, Chinese Academy of Engineering Physics, Mianyang 621900, China; Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoli Hu
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Zhongfang Liu
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Shaopu Liu
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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41
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Wang Q, Ma X, He J, Sun Q, Li Y, Li H. Binding properties of drospirenone with human serum albumin and lysozyme in vitro. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 153:612-8. [PMID: 26448295 DOI: 10.1016/j.saa.2015.09.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 07/28/2015] [Accepted: 09/26/2015] [Indexed: 05/19/2023]
Abstract
The interaction of drospirenone (DP) with human serum albumin (HSA)/lysozyme (LYZ) was investigated using different optical techniques and molecular models. Results from the emission and time resolved fluorescence studies revealed that HSA/LYZ emission quenching with DP was initiated by static quenching mechanism. The LYZ-DP system was more easily influenced by temperature than the HSA-DP system. Displacement experiments demonstrated that the DP binding site was mainly located in site 1 of HSA. Based on the docking methods, DP was mainly bound in the active site hinge region where Trp-62 and Trp-63 are located. Conformation study showed that DP had different effects on the local conformation of HSA and LYZ molecules.
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Affiliation(s)
- Qing Wang
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Xiangling Ma
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Jiawei He
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Qiaomei Sun
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Yuanzhi Li
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
| | - Hui Li
- College of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China.
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42
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Wang Q, Xiao Y, Huang Y, Li H. An important prerequisite for efficient Förster resonance energy transfer (FRET) from human serum albumin to alkyl gallate. RSC Adv 2016. [DOI: 10.1039/c6ra06920g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The formation of a stable complex by fixing alkyl gallate to HSA at an appropriate orientation and distance was an important prerequisite for efficient FRET. The specific structure of HSA helped provide the selectivity of alkyl gallate.
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Affiliation(s)
- Qing Wang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Ying Xiao
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Yanmei Huang
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
| | - Hui Li
- College of Chemical Engineering
- Sichuan University
- Chengdu
- China
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43
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Wang J, Yang X, Wang J, Xu C, Zhang W, Liu R, Zong W. Probing the binding interaction between cadmium(ii) chloride and lysozyme. NEW J CHEM 2016. [DOI: 10.1039/c5nj02911b] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Key binding sites influencing lysozyme activity when interacting with CdCl2.
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Affiliation(s)
- Jing Wang
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Xinping Yang
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Jinhu Wang
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Chi Xu
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Wandi Zhang
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Rutao Liu
- School of Environmental Science and Engineering
- Shandong University
- China–America CRC for Environment & Health
- Jinan 250100
- P. R. China
| | - Wansong Zong
- College of Population, Resources and Environment
- Shandong Normal University
- Jinan 250014
- P. R. China
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Bhatia NK, Srivastava A, Katyal N, Jain N, Khan MAI, Kundu B, Deep S. Curcumin binds to the pre-fibrillar aggregates of Cu/Zn superoxide dismutase (SOD1) and alters its amyloidogenic pathway resulting in reduced cytotoxicity. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:426-36. [PMID: 25666897 DOI: 10.1016/j.bbapap.2015.01.014] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 12/25/2014] [Accepted: 01/31/2015] [Indexed: 12/13/2022]
Abstract
Amyotrophic Lateral Sclerosis (ALS) is a fatal neurodegenerative disease that affects motor neurons. Unfortunately, effective therapeutics against this disease is still not available. Almost 20% of familial ALS (fALS) is suggested to be associated with pathological deposition of superoxide dismutase (SOD1). Evidences suggest that SOD1-containing pathological inclusions in ALS exhibit amyloid like properties. An effective strategy to combat ALS may be to inhibit amyloid formation of SOD1 using small molecules. In the present study, we observed the fibrillation of one of the premature forms of SOD1 (SOD1 with reduced disulfide) in the presence of curcumin. Using ThT binding assay, AFM, TEM images and FTIR, we demonstrate that curcumin inhibits the DTT-induced fibrillation of SOD1 and favors the formation of smaller and disordered aggregates of SOD1. The enhancement in curcumin fluorescence on the addition of oligomers and pre-fibrillar aggregates of SOD1 suggests binding of these species to curcumin. Docking studies indicate that putative binding site of curcumin may be the amyloidogenic regions of SOD1. Further, there is a significant increase in SOD1 mediated toxicity in the regime of pre-fibrillar and fibrillar aggregates which is not evident in curcumin containing samples. All these data suggest that curcumin reduces toxicity by binding to the amyloidogenic regions of the species on the aggregation pathway and blocking the formation of the toxic species. Nanoparticles of curcumin with higher aqueous solubility show similar aggregation control as that of curcumin bulk. This suggests a potential role for curcumin in the treatment of ALS.
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Affiliation(s)
- Nidhi K Bhatia
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - Ankit Srivastava
- Kusuma School of Biological Sciences, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - Nidhi Katyal
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - Nidhi Jain
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - M Ashhar I Khan
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - Bishwajit Kundu
- Kusuma School of Biological Sciences, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, India.
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45
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Wu FG, Sun HY, Zhou Y, Deng G, Yu ZW. Molecular-level pictures of the phase transitions of saturated and unsaturated phospholipid binary mixtures. RSC Adv 2015. [DOI: 10.1039/c4ra07569b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Saturated and unsaturated lipids change nonsynchronously upon heating-induced phase transitions.
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Affiliation(s)
- Fu-Gen Wu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Hai-Yuan Sun
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Yu Zhou
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Geng Deng
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
| | - Zhi-Wu Yu
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education)
- Department of Chemistry
- Tsinghua University
- Beijing 100084
- P. R. China
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46
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Jash C, Basu P, Payghan PV, Ghoshal N, Kumar GS. Chelerythrine–lysozyme interaction: spectroscopic studies, thermodynamics and molecular modeling exploration. Phys Chem Chem Phys 2015; 17:16630-45. [DOI: 10.1039/c5cp00424a] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The binding of the iminium and alkanolamine forms of chelerythrine to lysozyme (Lyz) was investigated by spectroscopy and molecular modeling studies.
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Affiliation(s)
- Chandrima Jash
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | - Pritha Basu
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | - Pavan V. Payghan
- Structural Biology and Bioinformatics Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | - Nanda Ghoshal
- Structural Biology and Bioinformatics Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory
- Chemistry Division
- CSIR-Indian Institute of Chemical Biology
- Kolkata 700 032
- India
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