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Brahma D, Sarangi AN, Kaushik R, Gupta AN. Oxidative stress induced conformational changes of human serum albumin. Phys Chem Chem Phys 2024; 26:8528-8538. [PMID: 38411624 DOI: 10.1039/d4cp00059e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Oxidative stress, generated by reactive oxygen species (ROS), is responsible for the loss of structure and functionality of proteins and is associated with several aging-related diseases. Here, we report an in vitro study to gauge the effect of ROS on the structural rearrangement of human serum albumin (HSA), a plasma protein, through metal-catalyzed oxidation (MCO) at physiological temperature through various biophysical techniques like UV-vis absorption, circular dichroism (CD), differential scanning calorimetry (DSC), MALDI-TOF, FTIR, and Raman spectroscopy. The UV-vis spectra of oxidized HSA show an early blueshift, signifying the unfolding of the protein because of ROS followed by the broadening of the absorption peak at a longer time. The DSC data corroborate the observation, revealing an exothermic transition for the oxidized sample at a longer time, suggesting in situ aggregation. The CD and FTIR spectra indicate the associated secondary structural changes occurring with time, depicting the variation of the helical content of HSA. The amide-III analysis of Raman data also complements the structural changes, and MALDI-TOF data show the mass distribution with time. Overall, this work might help determine the effect of oxidation on the biological activity of serum albumin as it can impact the physiological properties of HSA.
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Affiliation(s)
- Debdip Brahma
- Biophysics and Soft Matter Laboratory, Department of Physics, Indian Institute of Technology, Kharagpur, 721302, India.
| | - Akshay Narayan Sarangi
- Biophysics and Soft Matter Laboratory, Department of Physics, Indian Institute of Technology, Kharagpur, 721302, India.
| | - Rupal Kaushik
- Biophysics and Soft Matter Laboratory, Department of Physics, Indian Institute of Technology, Kharagpur, 721302, India.
| | - Amar Nath Gupta
- Biophysics and Soft Matter Laboratory, Department of Physics, Indian Institute of Technology, Kharagpur, 721302, India.
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2
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Rozhkov SP, Goryunov AS. Possible Phase Effects in the Dispersion of a Globular Protein in the Temperature Range of the Native State. Biophysics (Nagoya-shi) 2022. [DOI: 10.1134/s0006350922060215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
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3
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Warsi MS, Habib S, Talha M, Khan S, Singh P, Mir AR, Abidi M, Ali A. 4-Chloro-1,2-phenylenediamine induced structural perturbation and genotoxic aggregation in human serum albumin. Front Chem 2022; 10:1016354. [PMID: 36199663 PMCID: PMC9527296 DOI: 10.3389/fchem.2022.1016354] [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: 08/11/2022] [Accepted: 09/05/2022] [Indexed: 11/24/2022] Open
Abstract
4-Chloro-1,2-phenylenediamine (4-Cl-OPD) is a halogenated aromatic diamine used as a precursor in permanent hair color production. Despite its well-documented mutagenic and carcinogenic effects in various in vitro and in vivo models, its role in fibrillar aggregate formation and their genotoxic effect in therapeutic proteins has received less attention. The significance of human serum albumin (HSA) arises from its involvement in bio-regulatory and transport processes. HSA misfolding and aggregation are responsible for some of the most frequent neurodegenerative disorders. We used various complementary approaches to track the formation of amyloid fibrils and their genotoxic effect. Molecular dynamics study demonstrated the complex stability. The impact of 4-Cl-OPD on the structural dynamics of HSA was confirmed by Raman spectroscopy, X-ray diffraction, HPLC and SDS-PAGE. Fibrilllar aggregates were investigated using Congo red assay, DLS, and SEM. The genotoxic nature of 4-Cl-OPD was confirmed using plasmid nicking assay and DAPI staining, which revealed DNA damage and cell apoptosis. 4-Cl-OPD provides a model system for studying fibrillar aggregation and their genotoxic potential in the current investigation. Future studies should investigate the inhibition of the aggregation/fibrillation process, which may yield valuable clinical insights.
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Affiliation(s)
- Mohd Sharib Warsi
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Safia Habib
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Mohd Talha
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Shifa Khan
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Priyam Singh
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Abdul Rouf Mir
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Minhal Abidi
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Asif Ali
- Department of Biochemistry, Faculty of Medicine, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
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4
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Sun B, Zhang Y, Liu X, Wang K, Yang Y, Zhu L. Impacts of photoaging on the interactions between graphene oxide and proteins: Mechanisms and biological effect. WATER RESEARCH 2022; 216:118371. [PMID: 35381431 DOI: 10.1016/j.watres.2022.118371] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 03/01/2022] [Accepted: 03/25/2022] [Indexed: 06/14/2023]
Abstract
Graphene oxide (GO) are subjected to photoaging in aquatic environment, and inevitably enter biota and then interact with proteins. Here, the interactions of pristine and photoaged GO with two typical proteins (bovine serum albumin (BSA) and lysozyme) were systematically investigated. Due to long term photoirradiation (1-3 day), the lateral size of GO decreased greatly, and the oxygen-containing groups decreased as well while the graphitic carbon contents increased. Compared to pristine GO, the photoaged GO displayed stronger binding affinities with both proteins, which was mainly attributed to the increased binding sites as a result of smaller lateral size and increased hydrophobicity. The photoaging effect was more obvious for the negatively charged BSA, because hydrogen bonding and van der Waals force were mainly involved in the enthalpy-driven interactions between them. While, the strong electrostatic attraction between the positively charged lysozyme and GO diminished the photoaging effect. Analyses of synchronous, three-dimensional fluorescence spectra and fibrillation experiments intensified that the photoaged GO induced more serious changes in conformational structure of BSA and exhibited stronger inhibition on fibrillation of BSA compared to pristine GO. This study provided novel insights into the increased ecological risks of GO as a result of photoaging.
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Affiliation(s)
- Binbin Sun
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Yinqing Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Xinwei Liu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Kunkun Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Yi Yang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China
| | - Lingyan Zhu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.
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5
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Basu A, Bhowmick S, Mukherjee A. Flavonolignan silibinin abrogates SDS induced fibrillation of human serum albumin. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2021.100275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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6
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Kushwaha P, Prabhu NP. Imidazolium-based ionic liquids with increasing alkyl chain length of cations decrease the stability and fibrillation propensity of lysozyme. NEW J CHEM 2022. [DOI: 10.1039/d2nj00559j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imidazolium ionic liquids with longer alkyl side chains show a larger destabilization effect on lysozyme. Increased hydrophobicity of the IL increases its binding affinity and inhibits the fibril formation of lysozyme.
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Affiliation(s)
- Pratibha Kushwaha
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad – 500 046, India
| | - N. Prakash Prabhu
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad – 500 046, India
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7
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John R, Mathew J, Mathew A, Aravindakumar CT, Aravind UK. Probing the Role of Cu(II) Ions on Protein Aggregation Using Two Model Proteins. ACS OMEGA 2021; 6:35559-35571. [PMID: 34984287 PMCID: PMC8717569 DOI: 10.1021/acsomega.1c05119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/29/2021] [Indexed: 05/03/2023]
Abstract
Copper is an essential trace element for human biology where its metal dyshomeostasis accounts for an increased level of serum copper, which accelerates protein aggregation. Protein aggregation is a notable feature for many neurodegenerative disorders. Herein, we report an experimental study using two model proteins, bovine serum albumin (BSA) and human serum albumin (HSA), to elucidate the mechanistic pathway by which serum albumins get converted from a fully folded globular protein to a fibril and an amorphous aggregate upon interaction with copper. Steady-state fluorescence, time-resolved fluorescence studies, and Raman spectroscopy were used to monitor the unfolding of serum albumin with increasing copper concentrations. Steady-state fluorescence studies have revealed that the fluorescence quenching of BSA/HSA by Cu(II) has occurred through a static quenching mechanism, and we have evaluated both the quenching constants individually. The binding constants of BSA-Cu(II) and HSA-Cu(II) were found to be 2.42 × 104 and 0.05 × 104 M-1, respectively. Further nanoscale morphological changes of BSA mediated by oligomers to fibril and HSA to amorphous aggregate formation were studied using atomic force microscopy. This aggregation process correlates with the Stern-Volmer plots in the absence of discernible lag phase. Raman spectroscopy results obtained are in good agreement with the increase in antiparallel β-sheet structures formed during the aggregation of BSA in the presence of Cu(II) ions. However, an increase in α-helical fractions is observed for the amorphous aggregate formed from HSA.
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Affiliation(s)
- Reshmi John
- Inter
University Instrumentation Centre, Mahatma
Gandhi University, Kottayam 686560, Kerala, India
- Research
Department of Chemistry, S. B. College,
Assumption College, Changanacherry, Kottayam 686101, Kerala, India
| | - Jissy Mathew
- Research
Department of Chemistry, S. B. College,
Assumption College, Changanacherry, Kottayam 686101, Kerala, India
| | - Anu Mathew
- Sophisticated
Analytical Instrument Facility, Mahatma
Gandhi University, Kottayam 686560, Kerala, India
| | - Charuvila T. Aravindakumar
- Inter
University Instrumentation Centre, Mahatma
Gandhi University, Kottayam 686560, Kerala, India
- Sophisticated
Analytical Instrument Facility, Mahatma
Gandhi University, Kottayam 686560, Kerala, India
- School
of Environmental Sciences, Mahatma Gandhi
University, Kottayam 686560, Kerala, India
| | - Usha K. Aravind
- School
of Environmental Studies, Cochin University
of Science and Technology (CUSAT), Kochi 682022, Kerala, India
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8
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Sharma S, Modi P, Sharma G, Deep S. Kinetics theories to understand the mechanism of aggregation of a protein and to design strategies for its inhibition. Biophys Chem 2021; 278:106665. [PMID: 34419715 DOI: 10.1016/j.bpc.2021.106665] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/05/2021] [Accepted: 08/06/2021] [Indexed: 12/14/2022]
Abstract
Protein aggregation phenomenon is closely related to the formation of amyloids which results in many neurodegenerative diseases like Alzheimer's, Parkinson's, Huntington's, and Amyotrophic Lateral Sclerosis. In order to prevent and treat these diseases, a clear understanding of the mechanism of misfolding and self-assembly of peptides and proteins is very crucial. The aggregation of a protein may involve various microscopic events. Multiple simulations utilizing the solutions of the master equation have given a better understanding of the kinetic profiles involved in the presence and absence of a particular microscopic event. This review focuses on understanding the contribution of these molecular events to protein aggregation based on the analysis of kinetic profiles of aggregation. We also discuss the effect of inhibitors, which target various species of aggregation pathways, on the kinetic profile of protein aggregation. At the end of this review, some strategies for the inhibition of aggregation that can be utilized by combining the chemical kinetics approach with thermodynamics are proposed.
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Affiliation(s)
- Shilpa Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Priya Modi
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Gargi Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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9
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Li T, Wang L, Zhang X, Yu P, Chen Z. Effect of ionic strength on assembly behaviors and rheological properties of rice glutelin based fibrils. J Cereal Sci 2021. [DOI: 10.1016/j.jcs.2021.103224] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Masroor A, Chandel TI, Malik S, Mateen QN, Uversky VN, Khan RH. Evaluation of ThT augmentation and RLS inner filter effect caused by highly fluorescent coumarin derivative and establishing it as true inhibitor of amyloid fibrillation. Arch Biochem Biophys 2021; 709:108981. [PMID: 34214556 DOI: 10.1016/j.abb.2021.108981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 06/25/2021] [Accepted: 06/25/2021] [Indexed: 10/21/2022]
Abstract
Screening of inhibitors that slow down or suppress amyloid fibrils formation relies on some simple but sensitive spectroscopy techniques. Thioflavin T (ThT) fluorescence assay is one of the most common, amyloid specific and sensitive method. However, if an inhibitor is itself fluorescent in the ThT fluorescence range, its screening becomes complicated and require complementary assays. One of such molecules, 6, 7-dihydroxycoumarin (6, 7-DHC, also known as aesculetin, esculetin, and cichorigenin) is fluorescent in the ThT emission range and absorbs in the ThT excitation range. Therefore, it can produce a subtractive effect attributed to primary inner filter effect and/or additive effect due to its self-fluorescence in ThT assay. Our study shows that 6, 7-DHC produces an additive effect in ThT fluorescence, which is minimized at high concentration of ThT and decrease in ThT fluorescence is solely due to its inhibitory effect against HSA fibrillation. These ThT fluorescence-based results are verified through other complementary assays, such as Rayleigh and dynamic light scattering and amyloid-specific Congo red binding assay. Furthermore, hydrophobicity reduction is studied through Nile red (NR) and kinetics through far-UV circular dichroism (far-UV CD) in place of the most commonly employed ThT assay owing to extremely high fluorescence of 6, 7-DHC during initial incubation period.
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Affiliation(s)
- Aiman Masroor
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Tajalli Ilm Chandel
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Sadia Malik
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Qazi Noorul Mateen
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Vladimir N Uversky
- Department of Molecular Biology and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, United States
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India.
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11
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Sirangelo I, Iannuzzi C. Understanding the Role of Protein Glycation in the Amyloid Aggregation Process. Int J Mol Sci 2021; 22:ijms22126609. [PMID: 34205510 PMCID: PMC8235188 DOI: 10.3390/ijms22126609] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 02/06/2023] Open
Abstract
Protein function and flexibility is directly related to the native distribution of its structural elements and any alteration in protein architecture leads to several abnormalities and accumulation of misfolded proteins. This phenomenon is associated with a range of increasingly common human disorders, including Alzheimer and Parkinson diseases, type II diabetes, and a number of systemic amyloidosis characterized by the accumulation of amyloid aggregates both in the extracellular space of tissues and as intracellular deposits. Post-translational modifications are known to have an active role in the in vivo amyloid aggregation as able to affect protein structure and dynamics. Among them, a key role seems to be played by non-enzymatic glycation, the most unwanted irreversible modification of the protein structure, which strongly affects long-living proteins throughout the body. This study provided an overview of the molecular effects induced by glycation on the amyloid aggregation process of several protein models associated with misfolding diseases. In particular, we analyzed the role of glycation on protein folding, kinetics of amyloid formation, and amyloid cytotoxicity in order to shed light on the role of this post-translational modification in the in vivo amyloid aggregation process.
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12
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Lutzweiler G, Barthes J, Charles AL, Ball V, Louis B, Geny B, Vrana NE. Improving the colonization and functions of Wharton's Jelly-derived mesenchymal stem cells by a synergetic combination of porous polyurethane scaffold with an albumin-derived hydrogel. ACTA ACUST UNITED AC 2020; 16:015005. [PMID: 33300500 DOI: 10.1088/1748-605x/abaf05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The development of neo-tissues assisted by artificial scaffolds is continually progressing, but the reproduction of the extracellular environment surrounding cells is quite complex. While synthetic scaffolds can support cell growth, they lack biochemical cues that can prompt cell proliferation or differentiation. In this study, Wharton's Jelly-derived mesenchymal stem cells are seeded on a polyurethane (PU) scaffold combined with a hydrogel based on bovine serum albumin (BSA). BSA hydrogel is obtained through thermal treatment. While such treatment leads to partial unfolding of the protein, we show that the extent of denaturation is small enough to maintain its bioactivity, such as protein binding. Therefore, BSA provides a suitable playground for cells inside the scaffold, allowing higher spreading, proliferation and matrix secretions. Furthermore, the poor mechanical properties of the hydrogel are compensated for by the porous PU scaffold, whose architecture is well controlled. We show that even though PU by itself can allow cell adhesion and protein secretion, cell proliferation is 3.5 times higher in the PU + BSA scaffolds as compared to pure PU after 21 d, along with the non-collagenous protein secretions (389 versus 134 μmmg -1). Conversely, the secretion of sulphated glycosaminoglycans is 12.3-fold higher in the scaffold made solely of PU. Thereby, we propose a simple approach to generating a hybrid material composed of a combination of PU and BSA hydrogel as a promising scaffold for tissue regeneration.
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Affiliation(s)
- G Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121, 11 rue Humann, 67085, Strasbourg Cedex, France
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13
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Khan JM, Malik A, Rehman MT, AlAjmi MF, Ahmed MZ, Almutairi GO, Anwer MK, Khan RH. Cationic gemini surfactant stimulates amyloid fibril formation in bovine liver catalase at physiological pH. A biophysical study. RSC Adv 2020; 10:43751-43761. [PMID: 35519682 PMCID: PMC9058321 DOI: 10.1039/d0ra07560d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/09/2020] [Indexed: 11/23/2022] Open
Abstract
Surfactant molecules stimulate amyloid fibrillation and conformational switching in proteins but the mechanisms by which they accomplish these effects are unclear. A cationic gemini surfactant, C16C4C16Br2, with two positively charged heads and two-16C hydrophobic tails induces the amyloid fibrillation of bovine liver catalase (BLC) in vitro at physiological pH. The BLC transformed into amyloid aggregates in the presence of low concentrations (2–150 μM) of C16C4C16Br2 at pH 7.4, as confirmed by the use of several biophysical techniques (Rayleigh light scattering (RLS), intrinsic fluorescence, thioflavin T fluorescence (ThT), far-UV circular dichroism, and transmission electron microscopy). The secondary structure of BLC also changed according to the concentration of C16C4C16Br2: the α-helical structure of BLC decreased in the presence of 2–100 μM of C16C4C16Br2 but at concentrations above 200 μM BLC regained a α-helical structure very similar to the native BLC. In silico molecular docking between BLC and C16C4C16Br2 suggest that the positively charged heads of the surfactant interact with Asp127 through attractive electrostatic interactions. Moreover, a Pi-cation electrostatic interaction and hydrophobic interactions also take place between the tails of the surfactant and BLC. The stability of the BLC–C16C4C16Br2 complex was confirmed by performing a molecular dynamics simulation and evaluating parameters such as root mean square deviation (RMSD), root mean square fluctuation (RMSF), radius of gyration (Rg), and solvent accessible surface area (SASA). Apart from its aggregation inducing properties, the gemini surfactant itself causes toxicity to the cancerous cell (A549): which is confirmed by MTT assay. This work delivers new insight into the effect of cationic gemini surfactants in amyloid aggregation and paves the way to the rational design of new anti-amyloidogenic agents. Surfactant molecules stimulate amyloid fibrillation and conformational switching in proteins but the mechanisms by which they accomplish these effects are unclear.![]()
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Affiliation(s)
- Javed Masood Khan
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University 2460 Riyadh 11451 Saudi Arabia
| | - Ajamaluddin Malik
- Department of Biochemistry, College of Science, King Saud University Riyadh Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University Riyadh Saudi Arabia
| | - Mohamed F AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University Riyadh Saudi Arabia
| | - Mohammad Z Ahmed
- Department of Pharmacognosy, College of Pharmacy, King Saud University Riyadh Saudi Arabia
| | - Ghada Obaid Almutairi
- Department of Biochemistry, College of Science, King Saud University Riyadh Saudi Arabia
| | - Md Khalid Anwer
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University Alkharj 11942 Saudi Arabia
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh U.P. India
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14
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Anomalous Salt Dependence Reveals an Interplay of Attractive and Repulsive Electrostatic Interactions in α-synuclein Fibril Formation. QRB DISCOVERY 2020. [PMID: 37528959 PMCID: PMC10392692 DOI: 10.1017/qrd.2020.7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Abstractα-Synuclein (α-syn) is an intrinsically disordered protein with a highly asymmetric charge distribution, whose aggregation is linked to Parkinson’s disease. The effect of ionic strength was investigated at mildly acidic pH (5.5) in the presence of catalytic surfaces in the form of α-syn seeds or anionic lipid vesicles using thioflavin T fluorescence measurements. Similar trends were observed with both surfaces: increasing ionic strength reduced the rate of α-syn aggregation although the surfaces as well as α-syn have a net negative charge at pH 5.5. This anomalous salt dependence implies that short-range attractive electrostatic interactions are critical for secondary nucleation as well as heterogeneous primary nucleation. Such interactions were confirmed in Monte Carlo simulations of α-syn monomers interacting with surface-grafted C-terminal tails, and found to be weakened in the presence of salt. Thus, nucleation of α-syn aggregation depends critically on an attractive electrostatic component that is screened by salt to the extent that it outweighs the screening of the long-range repulsion between negatively charged monomers and negative surfaces. Interactions between the positively charged N-termini of α-syn monomers on the one hand, and the negatively C-termini of α-syn on fibrils or vesicles surfaces on the other hand, are thus critical for nucleation.
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15
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Al Adem K, Lukman S, Kim TY, Lee S. Inhibition of lysozyme aggregation and cellular toxicity by organic acids at acidic and physiological pH conditions. Int J Biol Macromol 2020; 149:921-930. [DOI: 10.1016/j.ijbiomac.2020.01.267] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/26/2020] [Accepted: 01/27/2020] [Indexed: 12/16/2022]
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16
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Masroor A, Zaidi N, Chandel TI, Aqueel Z, Malik S, Khan RH. Probing the Nongeneralized Amyloid Inhibitory Mechanism of Hydrophobic Chaperone. ACS Chem Neurosci 2020; 11:373-384. [PMID: 31935057 DOI: 10.1021/acschemneuro.9b00593] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Increasing prevalence of protein misfolding disorders urges the search for effective therapies. Although several antiaggregation molecules have been identified, their molecular process of aggregation and clinical trials are underway. The present study is focused on the mechanism through which phenyl butyrate (PB), a chemical chaperone, triggers inhibition of human serum albumin (HSA) fibrillation. Turbidity and Rayleigh light scattering (RLS) measurements reveal the marked presence of aggregates in HSA that were confirmed as amyloid fibrils by thioflavin T (ThT) and Congo red (CR) and were subsequently inhibited by PB in a dose dependent manner. ThT fluorescence kinetics reveals a decrease in the apparent rate constant, Kapp, in the presence of PB without triggering a lag phase in HSA suggesting PB's interference with the elongation phase. Dynamic light scattering (DLS) results display a reduction in the aggregate size in the presence of PB. Isothermal titration calorimetry (ITC) data reveals strong binding of PB at site II both at 25 °C (Kb ≈ 1.94 × 105 M-1) and 65 °C (Kb ≈ 2.90 × 104 M-1), mediated by hydrogen bonding. Overall, our finding establishes that PB stabilizes partially unfolded HSA molecules through hydrogen bonding, thereby preventing establishment of hydrogen bonds between them and hindering their progression into amyloid fibrils. This is in contrast to its chaperone effect manifested with other proteins.
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Affiliation(s)
- Aiman Masroor
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Tajalli Ilm Chandel
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Zoha Aqueel
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Sadia Malik
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India
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Maciążek-Jurczyk M, Janas K, Pożycka J, Szkudlarek A, Rogóż W, Owczarzy A, Kulig K. Human Serum Albumin Aggregation/Fibrillation and its Abilities to Drugs Binding. Molecules 2020; 25:molecules25030618. [PMID: 32023900 PMCID: PMC7038104 DOI: 10.3390/molecules25030618] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 01/23/2020] [Accepted: 01/29/2020] [Indexed: 02/07/2023] Open
Abstract
Human serum albumin (HSA) is a protein that transports neutral and acid ligands in the organism. Depending on the environment's pH conditions, HSA can take one of the five isomeric forms that change its conformation. HSA can form aggregates resembling those in vitro formed from amyloid at physiological pH (neutral and acidic). Not surprisingly, the main goal of the research was aggregation/fibrillation of HSA, the study of the physicochemical properties of formed amyloid fibrils using thioflavin T (ThT) and the analysis of ligand binding to aggregated/fibrillated albumin in the presence of dansyl-l-glutamine (dGlu), dansyl-l-proline (dPro), phenylbutazone (Phb) and ketoprofen (Ket). Solutions of human serum albumin, both non-modified and modified, were examined with the use of fluorescence, absorption and circular dichroism (CD) spectroscopy. The experiments conducted allowed observation of changes in the structure of incubated HSA (HSAINC) in relation to nonmodified HSA (HSAFR). The formed aggregates/fibrillation differed in structure from HSA monomers and dimers. Based on CD spectroscopy, previously absent βstructural constructs have been registered. Whereas, using fluorescence spectroscopy, the association constants differing for fresh and incubated HSA solutions in the presence of dansyl-amino acids and markers for binding sites were calculated and allowed observation of the conformational changes in HSA molecule.
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Affiliation(s)
- Małgorzata Maciążek-Jurczyk
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
- Correspondence: ; Tel.: +48-32-364-1582
| | - Kamil Janas
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
| | - Jadwiga Pożycka
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
| | - Agnieszka Szkudlarek
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
| | - Wojciech Rogóż
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
| | - Aleksandra Owczarzy
- Independent Public Clinical Hospital No. 1 in Zabrze, Medical University of Silesia, 40-055 Katowice, Poland;
| | - Karolina Kulig
- Department of Physical Pharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, 40-055 Katowice, Poland; (K.J.); (J.P.); (A.S.); (W.R.); (K.K.)
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18
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Donnarumma F, Leone S, Delfi M, Emendato A, Ami D, Laurents DV, Natalello A, Spadaccini R, Picone D. Probing structural changes during amyloid aggregation of the sweet protein MNEI. FEBS J 2019; 287:2808-2822. [DOI: 10.1111/febs.15168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/20/2019] [Accepted: 12/05/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Federica Donnarumma
- Department of Chemical Sciences University of Naples ‘Federico II’ Napoli Italy
| | - Serena Leone
- Department of Chemical Sciences University of Naples ‘Federico II’ Napoli Italy
| | - Masoud Delfi
- Department of Chemical Sciences University of Naples ‘Federico II’ Napoli Italy
| | - Alessandro Emendato
- Department of Chemical Sciences University of Naples ‘Federico II’ Napoli Italy
| | - Diletta Ami
- Department of Biotechnology and Biosciences University of Milano‐Bicocca Italy
| | - Douglas V. Laurents
- Institute of Physical Chemistry ‘Rocasolano’ Consejo Superior de Investigaciones Científicas Madrid Spain
| | - Antonino Natalello
- Department of Biotechnology and Biosciences University of Milano‐Bicocca Italy
| | - Roberta Spadaccini
- Department of Science and Technology Università degli Studi del Sannio Benevento Italy
| | - Delia Picone
- Department of Chemical Sciences University of Naples ‘Federico II’ Napoli Italy
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19
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Prudkin-Silva C, Pérez OE, Martínez KD, Barroso da Silva FL. Combined Experimental and Molecular Simulation Study of Insulin–Chitosan Complexation Driven by Electrostatic Interactions. J Chem Inf Model 2019; 60:854-865. [DOI: 10.1021/acs.jcim.9b00814] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Cecilia Prudkin-Silva
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales, IQUIBICEN-CONICET, Universidad de Buenos Aires, Buenos Aires, Intendente Güiraldes, s/n, Ciudad Universitaria, Pabellón 2, Buenos Aires CP 1428, Argentina
| | - Oscar E. Pérez
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales, IQUIBICEN-CONICET, Universidad de Buenos Aires, Buenos Aires, Intendente Güiraldes, s/n, Ciudad Universitaria, Pabellón 2, Buenos Aires CP 1428, Argentina
| | - Karina D. Martínez
- Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigación Científica y Técnicas de la República Argentina, ITAPROQ-CONICET, Universidad de Buenos Aires, Intendente Güiraldes, s/n, Ciudad Universitaria, Buenos Aires CP 1428, Argentina
| | - Fernando L. Barroso da Silva
- Departamento de Ciências Biomoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, 14040-903 Brazil
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
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20
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Parveen M, Aslam A, Alam M, Siddiqui MF, Bano B, Azaz S, Silva MR, Silva PSP. Synthesisand Characterization of Benzothiophene‐3‐carbonitrile Derivative and Its Interactions with Human Serum Albumin (HSA). ChemistrySelect 2019. [DOI: 10.1002/slct.201902378] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mehtab Parveen
- Division of Organic SynthesisDepartment of ChemistryAligarh Muslim University Aligarh 202002 India
| | - Afroz Aslam
- Division of Organic SynthesisDepartment of ChemistryAligarh Muslim University Aligarh 202002 India
| | - Mahboob Alam
- Division of Chemistry and BiotechnologyDongguk University 123Dongdae-ro Gyeongju 780-714 Republic of Korea
| | | | - Bilqees Bano
- Department of BiochemistryAligarh Muslim University Aligarh 202002 India
| | - Shaista Azaz
- Division of Organic SynthesisDepartment of ChemistryAligarh Muslim University Aligarh 202002 India
| | - Manuela Ramos Silva
- CFisUCDepartment of PhysicsUniversity of Coimbra, P- 3004-516 Coimbra Portugal
| | - P. S. Pereira Silva
- CFisUCDepartment of PhysicsUniversity of Coimbra, P- 3004-516 Coimbra Portugal
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21
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Park JH, Ferhan AR, Jackman JA, Cho NJ. Modulating conformational stability of human serum albumin and implications for surface passivation applications. Colloids Surf B Biointerfaces 2019; 180:306-312. [DOI: 10.1016/j.colsurfb.2019.04.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 04/08/2019] [Indexed: 12/11/2022]
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22
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Probing the binding effects of zinc and cadmium with garlic phytocystatin: Implication of the abiotic stress on garlic phytocystatin. Int J Biol Macromol 2019; 133:945-956. [DOI: 10.1016/j.ijbiomac.2019.04.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/10/2019] [Accepted: 04/05/2019] [Indexed: 11/24/2022]
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23
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Li J, Pylypchuk I, Johansson DP, Kessler VG, Seisenbaeva GA, Langton M. Self-assembly of plant protein fibrils interacting with superparamagnetic iron oxide nanoparticles. Sci Rep 2019; 9:8939. [PMID: 31222107 PMCID: PMC6586877 DOI: 10.1038/s41598-019-45437-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 06/05/2019] [Indexed: 11/09/2022] Open
Abstract
In situ fibrillation of plant proteins in presence of the superparamagnetic iron oxide nanoparticles (NP) promoted formation of a hybrid nanocomposite. The morphology of NP-fibril composite was revealed using ex-situ atomic force microscopy (AFM) in air. The NP-fibrils were associated into extended multi-fibril structures, indicating that the addition of NPs promoted protein association via β-sheet assembly. Real-time movement of NPs attached to fibrils under an external magnetic field was visualized using in-situ AFM in liquid, revealing that composite structures were stable at low pH, and displaying dipolar property of the NPs in the composite at high pH. Changes in magnetic properties of NPs when interacting with protein fibrils were quantitatively mapped using magnetic force microscopy (MFM). The magnetic moment of the NPs in composite was increased by co-existing with protein at low pH, while their dipolar nature was maintained at high pH. Self-assembly of the protein into fibrils is accelerated with increasing NP concentration within an optimal range, which is attributed to a fibrillation-competent conformation of the peptides. The latter was explained by the formation of favorable hydrogen bonds, electrostatic interactions, and efficient surface energy transfer between NPs and proteins.
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Affiliation(s)
- Jing Li
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
| | - Ievgen Pylypchuk
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Daniel P Johansson
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Vadim G Kessler
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Gulaim A Seisenbaeva
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
| | - Maud Langton
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
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24
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Sequeira MA, Herrera MG, Dodero VI. Modulating amyloid fibrillation in a minimalist model peptide by intermolecular disulfide chemical reduction. Phys Chem Chem Phys 2019; 21:11916-11923. [PMID: 31125036 DOI: 10.1039/c9cp01846h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Peptide structural transformation and aggregation is associated with a large number of outsider aetiology diseases, and it is intrinsically linked to amyloid peptide aggregation. Diphenylalanine self-assembled structures are used as robust minimalist beta amyloids not only to elucidate protein aggregation but also to generate hydrogels. Herein, we employed a neutral model peptide Ac-Phe-Phe-Cys-NH2 (Ac-FFC-NH2) to elucidate the role of intermolecular disulfide bonds in protein fibrillation. The Ac-FFC-NH2 peptide initially self-assembles into nanospheres that evolve to amyloid type fibrils under mild oxidative conditions. Incubation of the peptide in the presence of the chemical reduction agent TCEP inhibits the formation of the fibrils, detecting only spherical nanostructures with no secondary structure. Importantly, we triggered the transformation of the preformed linear straight amyloid fibrils to non-fibrillar structures by TCEP treatment. Under this condition, the amyloid bundles are transformed into rings, which evolve to a new spherical microstructure. We showed that the chemical reduction of intermolecular S-S in internal amyloid sequences might favour the off-path intermediates of amyloid fibril growth, even when the fibrils are formed. Our findings demonstrated that in internal amyloid sequences, the formation of intermolecular S-S promotes the formation of amyloid type fibrils; meanwhile, its reduction stabilises non-fibrillar structures. Altogether, this work provides fundamental understanding at the molecular and supramolecular level, thus facilitating the rational design of therapeutic tools for protein aggregation diseases.
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Affiliation(s)
- María Alejandra Sequeira
- Instituto de Química del Sur (INQUISUR-CONICET), Departamento de Química, Universidad Nacional del Sur, 8000FTN Bahía Blanca, Argentina
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25
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Basu A, Kundu S, Basu C, Ghosh SK, Sur R, Mukherjee A. Biopolymer nanoparticle surface chemistry dictates the nature and extent of protein hard corona. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Kim J, Thomas CA, Ewald JM, Kurien NM, Booker ME, Greve HJ, Albu TV. Studies on lysozyme modifications induced by substituted p-benzoquinones. Bioorg Chem 2019; 85:386-398. [PMID: 30665033 DOI: 10.1016/j.bioorg.2019.01.018] [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: 10/23/2018] [Revised: 01/03/2019] [Accepted: 01/08/2019] [Indexed: 11/19/2022]
Abstract
Protein misfolding can facilitate a protein damaging process and makes it susceptible to a series of events such as unfolding, adduct formation, oligomerization, or aggregation. Loss of a protein's native structure may result in its biological malfunction and/or cellular toxicity that could cause associated diseases. Several factors were identified for causing structural changes of a protein, however quinone-induced protein modifications received very little attention whether for amyloidal or non-amyloidal proteins. In this paper, we report our investigation on lysozyme modifications upon treatment with selected benzoquinones (BQs), utilizing fluorescence spectroscopy including anisotropy determination, UV-Vis spectroscopy, and SDS-PAGE. Lysozyme was reacted with substituted BQs in order to examine substituent effects on protein modifications. In addition, we evaluated lysozyme modifications induced by 1,4-benzoquinone in concentration-, pH-, temperature-, and time-dependent studies. Our study shows that all BQs can readily modify lysozyme in a complex manner through adduct formation, oligomerization, polymeric aggregation, and/or fibrilization. Electrochemical properties of selected BQs were monitored using cyclic voltammetry in phosphate buffered aqueous solution, and it was found that quinone reduction potentials correlate well with their reactivity trend toward lysozyme.
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Affiliation(s)
- Jisook Kim
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA.
| | - Charles A Thomas
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
| | - Jacob M Ewald
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
| | - Neethu M Kurien
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
| | - Mary E Booker
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
| | - Hendrik J Greve
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA
| | - Titus V Albu
- Department of Chemistry and Physics, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA.
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27
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Yue Y, Wang Z, Zhang Y, Wang Z, Lv Q, Liu J. Binding of triclosan and triclocarban to pepsin: DFT, spectroscopic and dynamic simulation studies. CHEMOSPHERE 2019; 214:278-287. [PMID: 30265935 DOI: 10.1016/j.chemosphere.2018.09.108] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/29/2018] [Accepted: 09/18/2018] [Indexed: 06/08/2023]
Abstract
The use of antibacterial agents, triclosan (TCS) and triclocarban (TCC), in personal care products can result in direct human exposure. Density Functional Theory (DFT) was utilized to evaluate the electronic properties of TCS and TCC, and the determined energetically accessible transitions across the HOMO-LUMO gap. Choosing pepsin as a model protein, we explored the binding effects of TCS or TCC on pepsin by molecular docking and dynamic simulations. Titration of pepsin with TCS or TCC at pH 2.2 led to quenching of the pepsin intrinsic fluorescence via formation of a ground-state complex. The binding constants of the TCS/TCC-pepsin complexes, determined at 296 K, were (7.053 ± 0.030) × 104 M-1 and (6.233 ± 0.060) × 104 M-1, respectively. Analysis of the thermodynamic properties of each system at various temperatures demonstrated that the binding reaction is a spontaneous process driven by hydrophobic interactions. The spectroscopic results revealed that changes in the secondary structure of pepsin are induced by TCS or TCC. The thermal stability of pepsin was evaluated, and no change in thermal stability was observed upon substrate binding. However, the binding of either TCS or TCC to pepsin effectively reduced the activity.
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Affiliation(s)
- Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
| | - Zhiyue Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Yanyan Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Zhixian Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Qingzhang Lv
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, PR China.
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28
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Siddiqui MF, Khan MS, Husain FM, Bano B. Deciphering the binding of carbendazim (fungicide) with human serum albumin: A multi-spectroscopic and molecular modelling studies. J Biomol Struct Dyn 2018; 37:2230-2241. [DOI: 10.1080/07391102.2018.1481768] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Mohd Faizan Siddiqui
- Department of Biochemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
| | - Mohd Shahnawaz Khan
- Protein Research Chair, Department of Biochemistry, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi ArabiaCommunicated by Ramaswamy H. Sarma
| | - Bilqees Bano
- Department of Biochemistry, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
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29
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Insulin adsorption onto zinc oxide nanoparticle mediates conformational rearrangement into amyloid-prone structure with enhanced cytotoxic propensity. Biochim Biophys Acta Gen Subj 2018; 1863:153-166. [PMID: 30315849 DOI: 10.1016/j.bbagen.2018.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 09/02/2018] [Accepted: 10/03/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Injection localized amyloidosis is one of the most prevalent disorders in type II diabetes mellitus (TIIDM) patients relying on insulin injections. Previous studies have reported that nanoparticles can play a role in the amyloidogenic process of proteins. Hence, the present study deals with the effect of zinc oxide nanoparticles (ZnONP) on the amyloidogenicity and cytotoxicity of insulin. METHODS ZnONP is synthesised and characterized using XRD, Zeta Sizer, UV-Visible spectroscope and TEM. The characterization is followed by ZnONP interaction with insulin, which is studied employing fluorescence spectroscopes, isothermal titration calorimetry and molecular dynamics simulations. The interaction leads insulin conformational rearrangement into amyloid-like fibril, which is studied using thioflavin T dye binding assay, circular dichroism spectroscopy and TEM, followed by cytotoxicity propensity using Alamar Blue dye reduction assay. RESULTS Insulin has very weak interaction with ZnONP interface. Insulin at studied concentration forms amorphous aggregates at physiological pH, whereas in presence of ZnONP interface amyloid-like fibrils are formed. While the amyloid-like fibrils are cytotoxic to MIN6 and THP-1 cell lines, insulin and ZnONP individual solutions and their fresh mixtures enhance the cells proliferation. CONCLUSIONS The presence of ZnONP interface enhances insulin fibrillation at physiological pH by providing a favourable template for the nucleation and growth of insulin amyloids. GENERAL SIGNIFICANCE The studied protein-nanoparticle system from protein conformational dynamics point of view throws caution over nanoparticle use in biological applications, especially in vivo applications, considering the amyloidosis a very slow but non-curable degenerative disease.
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30
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Silva CP, Martínez JH, Martínez KD, Farías ME, Leskow FC, Pérez OE. Proposed molecular model for electrostatic interactions between insulin and chitosan. Nano-complexation and activity in cultured cells. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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31
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Shanmugapriya A, Dallemer F, Prabhakaran R. Synthesis, characterisation, crystal structures and biological studies of palladium(ii) complexes containing 5-(2-hydroxy-3-methoxy-phenyl)-2,4-dihydro[1,2,4]triazole-3-thione derivatives. NEW J CHEM 2018. [DOI: 10.1039/c8nj03714k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New structurally different palladium(ii) complexes have been synthesized and characterized and evaluated for their cytotoxic nature against human breast cancer cell line (MCF 7) which showed significant activity.
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Affiliation(s)
- A. Shanmugapriya
- Department of Chemistry, Bharathiar University
- Coimbatore 641 046
- India
| | - F. Dallemer
- Lab MADIREL CNRS UMR 7246, Aix Marseille University
- 13397 Marseille Cedex 20
- France
| | - R. Prabhakaran
- Department of Chemistry, Bharathiar University
- Coimbatore 641 046
- India
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32
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Basu A, Bhayye S, Kundu S, Das A, Mukherjee A. Andrographolide inhibits human serum albumin fibril formations through site-specific molecular interactions. RSC Adv 2018; 8:30717-30724. [PMID: 35548768 PMCID: PMC9085492 DOI: 10.1039/c8ra04637a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/03/2018] [Indexed: 01/13/2023] Open
Abstract
Protein misfolding and fibrillation are the fundamental traits in degenerative diseases like Alzheimer's, Parkinsonism, and diabetes mellitus. Bioactives such as flavonoids and terpenoids from plant sources are known to express protective effects against an array of diseases including diabetes, Alzheimer's and obesity. Andrographolide (AG), a labdane diterpenoid is prescribed widely in the Indian and Chinese health care systems for classical efficacy against a number of degenerative diseases. This work presents an in depth study on the effects of AG on protein fibrillating pathophysiology. Thioflavin T fluorescence spectroscopy and DLS results indicated concentration dependent inhibition of human serum albumin (HSA) fibrillation. The results were confirmed by electron microscopy studies. HSA fibril formations were markedly reduced in the presence of AG. Fluorescence studies and UV-Vis experiments confirmed further that AG molecularly interacts with HSA at site. In silico molecular docking studies revealed hydrogen bonding and hydrophobic interactions with HSA in the native state. Thus AG interacts with HSA, stabilizes the native protein structure and inhibits fibrillation. The results demonstrated that the compound possesses anti-amyloidogenic properties and can be promising against some human degenerative diseases. Andrographolide inhibited HSA protein fibrillation through site specific interactions.![]()
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Affiliation(s)
- Aalok Basu
- Division of Pharmaceutical and Fine Chemical Technology
- Department of Chemical Technology
- University of Calcutta
- Kolkata 700009
- India
| | - Sagar Bhayye
- Division of Pharmaceutical and Fine Chemical Technology
- Department of Chemical Technology
- University of Calcutta
- Kolkata 700009
- India
| | - Sonia Kundu
- Division of Pharmaceutical and Fine Chemical Technology
- Department of Chemical Technology
- University of Calcutta
- Kolkata 700009
- India
| | - Aatryee Das
- Division of Pharmaceutical and Fine Chemical Technology
- Department of Chemical Technology
- University of Calcutta
- Kolkata 700009
- India
| | - Arup Mukherjee
- Division of Pharmaceutical and Fine Chemical Technology
- Department of Chemical Technology
- University of Calcutta
- Kolkata 700009
- India
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33
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Bhattacharya A, Bhowmik S, Singh AK, Kodgire P, Das AK, Mukherjee TK. Direct Evidence of Intrinsic Blue Fluorescence from Oligomeric Interfaces of Human Serum Albumin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10606-10615. [PMID: 28930631 DOI: 10.1021/acs.langmuir.7b02463] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The molecular origin behind the concentration-dependent intrinsic blue fluorescence of human serum albumin (HSA) is not known yet. This unusual blue fluorescence is believed to be a characteristic feature of amyloid-like fibrils of protein/peptide and originates due to the delocalization of peptide bond electrons through the extended hydrogen bond networks of cross-β-sheet structure. Herein, by combining the results of spectroscopy, size exclusion chromatography, native gel electrophoresis, and confocal microscopy, we have shown that the intrinsic blue fluorescence of HSA exclusively originates from oligomeric interfaces devoid of any amyloid-like fibrillar structure. Our study suggests that this low energy fluorescence band is not due to any particular residue/sequence, but rather it is a common feature of self-assembled peptide bonds. The present findings of intrinsic blue fluorescence from oligomeric interfaces pave the way for future applications of this unique visual phenomenon for early stage detection of various protein aggregation related human diseases.
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Affiliation(s)
- Arpan Bhattacharya
- Discipline of Chemistry, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
| | - Soumitra Bhowmik
- Discipline of Chemistry, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
| | - Amit K Singh
- Centre of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
| | - Prashant Kodgire
- Centre of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
| | - Apurba K Das
- Discipline of Chemistry, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
| | - Tushar Kanti Mukherjee
- Discipline of Chemistry, Indian Institute of Technology Indore , Khandwa Road, Indore 453552, Madhya Pradesh, India
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Kiran Kumar E, Prasad DK, Prakash Prabhu N. Concentration dependent switch in the kinetic pathway of lysozyme fibrillation: Spectroscopic and microscopic analysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 183:187-194. [PMID: 28448956 DOI: 10.1016/j.saa.2017.04.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 03/09/2017] [Accepted: 04/14/2017] [Indexed: 06/07/2023]
Abstract
Formation of amyloid fibrils is found to be a general tendency of many proteins. Investigating the kinetic mechanisms and structural features of the intermediates and the final fibrillar state is essential to understand their role in amyloid diseases. Lysozyme, a notable model protein for amyloidogenic studies, readily formed fibrils in vitro at neutral pH in the presence of urea. It, however, showed two different kinetic pathways under varying urea concentrations when probed with thioflavin T (ThT) fluorescence. In 2M urea, lysozyme followed a nucleation-dependent fibril formation pathway which was not altered by varying the protein concentration from 2mg/ml to 8mg/ml. In 4M urea, the protein exhibited concentration dependent change in the mechanism. At lower protein concentrations, lysozyme formed fibrils without any detectable nuclei (nucleation-independent polymerization pathway). When the concentration of the protein was increased above 3mg/ml, the protein followed nucleation-dependent polymerization pathway as observed in the case of 2M urea condition. This was further verified using microscopic images of the fibrils. The kinetic parameters such as lag time, elongation rate, and fibrillation half-time, which were derived from ThT fluorescence changes, showed linear dependency against the initial protein concentration suggested that under the nucleation-dependent pathway conditions, the protein followed primary-nucleation mechanism without any significant secondary nucleation events. The results also suggested that the differences in the initial protein conformation might alter the mechanism of fibrillation; however, at the higher protein concentrations lysozyme shifted to nucleation-dependent pathway.
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Affiliation(s)
- E Kiran Kumar
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India
| | - Deepak Kumar Prasad
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India
| | - N Prakash Prabhu
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India.
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Rabbani G, Baig MH, Lee EJ, Cho WK, Ma JY, Choi I. Biophysical Study on the Interaction between Eperisone Hydrochloride and Human Serum Albumin Using Spectroscopic, Calorimetric, and Molecular Docking Analyses. Mol Pharm 2017; 14:1656-1665. [DOI: 10.1021/acs.molpharmaceut.6b01124] [Citation(s) in RCA: 158] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Gulam Rabbani
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Mohammad Hassan Baig
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Eun Ju Lee
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Won-Kyung Cho
- Korean
Medicine (KM) Application Center, Korea Institute of Oriental Medicine (KIOM), Donggu, Daegu-41062, Republic of Korea
| | - Jin Yeul Ma
- Korean
Medicine (KM) Application Center, Korea Institute of Oriental Medicine (KIOM), Donggu, Daegu-41062, Republic of Korea
| | - Inho Choi
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
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Rabbani G, Baig MH, Lee EJ, Cho WK, Ma JY, Choi I. Biophysical Study on the Interaction between Eperisone Hydrochloride and Human Serum Albumin Using Spectroscopic, Calorimetric, and Molecular Docking Analyses. Mol Pharm 2017. [DOI: 10.1021/acs.molpharmaceut.6b01124 pmid: 28380300] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Gulam Rabbani
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Mohammad Hassan Baig
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Eun Ju Lee
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
| | - Won-Kyung Cho
- Korean
Medicine (KM) Application Center, Korea Institute of Oriental Medicine (KIOM), Donggu, Daegu-41062, Republic of Korea
| | - Jin Yeul Ma
- Korean
Medicine (KM) Application Center, Korea Institute of Oriental Medicine (KIOM), Donggu, Daegu-41062, Republic of Korea
| | - Inho Choi
- Department
of Medical Biotechnology, YeungNam University, 280 Daehak-ro, Gyeongsan, Gyeongbuk-38541, Republic of Korea
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Byadagi K, Meti M, Nandibewoor S, Chimatadar S. Investigation of binding behaviour of procainamide hydrochloride with human serum albumin using synchronous, 3D fluorescence and circular dichroism. J Pharm Anal 2017; 7:103-109. [PMID: 29404024 PMCID: PMC5686859 DOI: 10.1016/j.jpha.2016.07.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 07/15/2016] [Accepted: 07/17/2016] [Indexed: 11/15/2022] Open
Abstract
Interaction of procainamide hydrochloride (PAH) with human serum albumin (HSA) is of great significance in understanding the pharmacokinetic and pharmacodynamic mechanisms of the drug. Multi-spectroscopic techniques were used to investigate the binding mode of PAH to HSA and results revealed the presence of static type of quenching mechanism. The number of binding sites, binding constants and thermodynamic parameters were calculated. The results showed a spontaneous binding of PAH to HSA and hydrophobic interactions played a major role. In addition, the distance between PAH and the Trp-214 was estimated employing the Förster's theory. Site marker competitive experiments indicated that the binding of PAH to HSA primarily took place in subdomain IIA (Sudlow's site I). The influence of interference of some common metal ions on the binding of PAH to HSA was studied. Synchronous fluorescence spectra (SFS), 3D fluorescence spectra and circular dichroism (CD) results indicated the conformational changes in the structure of HSA.
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Chandra K, Das P, Metanis N, Friedler A, Reches M. Peptide fibrils as monomer storage of the covalent HIV-1 integrase inhibitor. J Pept Sci 2017; 23:117-121. [PMID: 28070909 DOI: 10.1002/psc.2959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/13/2016] [Accepted: 11/17/2016] [Indexed: 12/27/2022]
Abstract
We have recently reported the covalent inhibition of HIV-1 integrase by an N-terminal succinimide-modified lens epithelium-derived growth factor (361-370) peptide. We also showed that this peptide is proteolytically stable. Here, we show that this inhibitor is stored as fibrils that serve as a stock for the inhibitory monomers. The fibrils increase the local concentration of the peptide at the target protein. When the monomers bind integrase, the equilibrium between the fibrils and their monomers shifts towards the formation of peptide monomers. The combination of fibril formation and subsequent proteolytic stability of the peptide may bring to new strategy for developing therapeutic agents. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- Koushik Chandra
- Institute of Chemistry and the Centre for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel.,Department of Chemistry, Midnapore College (Autonomous), Raja Bazar Main Road, Midnapore (West), 721101, West Bengal, India
| | - Priyadip Das
- Institute of Chemistry and the Centre for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
| | - Norman Metanis
- Institute of Chemistry and the Centre for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
| | - Assaf Friedler
- Institute of Chemistry and the Centre for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
| | - Meital Reches
- Institute of Chemistry and the Centre for Nanoscience and Nanotechnology, Edmond J. Safra Campus, The Hebrew University of Jerusalem, Givat-Ram, Jerusalem, 91904, Israel
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Park JH, Sut TN, Jackman JA, Ferhan AR, Yoon BK, Cho NJ. Controlling adsorption and passivation properties of bovine serum albumin on silica surfaces by ionic strength modulation and cross-linking. Phys Chem Chem Phys 2017; 19:8854-8865. [DOI: 10.1039/c7cp01310h] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the physicochemical factors that influence protein adsorption onto solid supports holds wide relevance for fundamental insights into protein structure and function as well as for applications such as surface passivation.
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Affiliation(s)
- Jae Hyeon Park
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Tun Naw Sut
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Joshua A. Jackman
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Abdul Rahim Ferhan
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Bo Kyeong Yoon
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
| | - Nam-Joon Cho
- School of Materials Science and Engineering
- Nanyang Technological University
- Singapore
- Centre for Biomimetic Sensor Science
- Nanyang Technological University
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40
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Stirpe A, Pantusa M, Rizzuti B, De Santo MP, Sportelli L, Bartucci R, Guzzi R. Resveratrol induces thermal stabilization of human serum albumin and modulates the early aggregation stage. Int J Biol Macromol 2016; 92:1049-1056. [DOI: 10.1016/j.ijbiomac.2016.08.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 08/03/2016] [Accepted: 08/06/2016] [Indexed: 10/21/2022]
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41
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Patgar M, Durgannavar A, Nandibewoor S, Chimatadar S. Spectroscopic exploration and thermodynamic characterization of desvenlafaxine interacting with fluorescent bovine serum albumin. J Mol Recognit 2016; 30. [DOI: 10.1002/jmr.2567] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 07/16/2016] [Accepted: 08/21/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Manjanath Patgar
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580003 Karnataka India
| | - Amar Durgannavar
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580003 Karnataka India
| | - Sharanappa Nandibewoor
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580003 Karnataka India
| | - Shivamurti Chimatadar
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580003 Karnataka India
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42
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Amdursky N. Photoacids as a new fluorescence tool for tracking structural transitions of proteins: following the concentration-induced transition of bovine serum albumin. Phys Chem Chem Phys 2016; 17:32023-32. [PMID: 26573990 DOI: 10.1039/c5cp05548b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Spectroscopy-based techniques for assessing structural transitions of proteins follow either an intramolecular chromophore, as in absorption-based circular dichroism (CD) or fluorescence-based tryptophan emission, or an intermolecular chromophore such as fluorescent probes. Here a new fluorescent probe method to probe the structural transition of proteins by photoacids is presented, which has a fundamentally different photo-physical origin to that of common fluorescent probes. Photoacids are molecules that release a proton upon photo-excitation. By following the steady-state and time-resolved emission of the protonated and de-protonated species of the photoacid we probe the environment of its binding site in bovine serum albumin (BSA) in a wide range of weight concentrations (0.001-8%). We found a unique concentration-induced structural transition of BSA at pH2 and at concentrations of >0.75%, which involves the exposure of its hydrophobic core to the solution. We confirm our results with the common tryptophan emission method, and show that the use of photoacids can result in a much more sensitive tool. We also show that common fluorescent probes and the CD methodologies have fundamental restrictions that limit their use in a concentration-dependent study. The use of photoacids is facile and requires only a fluorospectrometer (and preferably, but not mandatorily, a time-resolution emission system). The photoacid can be either non-covalently (as in this study) or covalently attached to the molecule, and can be readily employed to follow the local environment of numerous (bio-)systems.
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Affiliation(s)
- Nadav Amdursky
- Departments of Materials and Bioengineering, Imperial College London, London, SW7 2AZ, UK.
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Sekar G, Sivakumar A, Mukherjee A, Chandrasekaran N. Prion like behavior of HSA-hydroxylated MWCNT interface. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2016; 161:411-421. [PMID: 27314539 DOI: 10.1016/j.jphotobiol.2016.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 06/05/2016] [Indexed: 06/06/2023]
Abstract
Carbon nanotubes (CNTs) with unique and outstanding properties were expected to revolutionize various aspects of the biomedical sector. Interaction studies of proteins with functionalized CNTs would shed light on their toxicological aspects upon entering the human body. Hyperchromicity of the UV-Visible spectra and declining fluorescence potential of HSA on interaction with CNTs suggested ground state complex to exist between them. Synchronous and 3D spectral features of CNT-HSA system proposed their possible binding site to occur nearby Trp and Tyr residues. FTIR and FT-Raman spectra showed a shift in the amide band region that proportionate the possible alteration to occur in the alpha-helical structures. CD far and near spectra showed loss of alpha-helical structures and shift in the Trp position of the polypeptide backbone. CNT's UV and FTIR band showed shift on interaction with HSA, which conveys the possible aggregation of CNTs in the presence of protein. The promoting role of CNTs against HSA fibril formation has been confirmed by spectroscopic and microscopic evaluations. Secondary conformational changes, besides the existence of increased beta-sheet structures of HSA amyloid fibrils, remain similar to the amyloid behavior of Prion protein. Hence, HSA fibril-CNT interface predominates the possible mechanism for several amyloid-related disorders concerning their toxic accumulations in the body.
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Affiliation(s)
- Gajalakshmi Sekar
- Centre for Nanobiotechnology, VIT University, Vellore, 632014, Tamil Nadu, India
| | - A Sivakumar
- School of Advanced Sciences, VIT University, Vellore, 632014, Tamil Nadu, India
| | - Amitava Mukherjee
- Centre for Nanobiotechnology, VIT University, Vellore, 632014, Tamil Nadu, India
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Production of lysozyme nanofibers using deep eutectic solvent aqueous solutions. Colloids Surf B Biointerfaces 2016; 147:36-44. [PMID: 27478961 DOI: 10.1016/j.colsurfb.2016.07.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/23/2016] [Accepted: 07/03/2016] [Indexed: 12/30/2022]
Abstract
Amyloid fibrils have recently gained a lot of attention due to their morphology, functionality and mechanical strength, allowing for their application in nanofiber-based materials, biosensors, bioactive membranes and tissue engineering scaffolds. The in vitro production of amyloid fibrils is still a slow process, thus hampering the massive production of nanofibers and its consequent use. This work presents a new and faster (2-3h) fibrillation method for hen egg white lysozyme (HEWL) using a deep eutectic solvent based on cholinium chloride and acetic acid. Nanofibers with dimensions of 0.5-1μm in length and 0.02-0.1μm in thickness were obtained. Experimental variables such as temperature and pH were also studied, unveiling their influence in fibrillation time and nanofibers morphology. These results open a new scope for protein fibrillation into nanofibers with applications ranging from medicine to soft matter and nanotechnology.
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Magdum PA, Gokavi NM, Nandibewoor ST. Study on the interaction between anti-tuberculosis drug ethambutol and bovine serum albumin: multispectroscopic and cyclic voltammetric approaches. LUMINESCENCE 2016; 32:206-216. [PMID: 27377878 DOI: 10.1002/bio.3169] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/06/2016] [Accepted: 05/10/2016] [Indexed: 11/09/2022]
Abstract
The binding of bovine serum albumin (BSA) to ethambutol (EMB) was investigated using spectroscopic methods, viz., fluorescence, Fourier transform infrared (FTIR), ultraviolet (UV)/vis absorption and cyclic voltammetry techniques. Spectroscopic analysis of the emission quenching at different temperatures revealed that the quenching mechanism of serum albumin by EMB is static, which was also confirmed by lifetime measurements. The number of binding sites, n, and binding constant, K, were obtained at various temperatures. The distance, r, between EMB and the protein was evaluated according to the Förster energy transfer theory. Based on displacement experiments using site probes, viz., warfarin, ibuprofen and digitoxin, the site of binding of EMB in BSA was proposed to be Sudlow's site I. The effect of EMB on the conformation of BSA was analyzed by using synchronous fluorescence spectra (SFS) and 3D fluorescence spectra. The results of fluorescence, UV/vis absorption and FTIR spectra showed that the conformation of BSA was changed in the presence of EMB. The thermodynamic parameters including enthalpy change (ΔH0 ), entropy change (ΔS0 ) and free energy change (ΔG0 ) for BSA-EMB were calculated according to the van't Hoff equation and are discussed.
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Affiliation(s)
- Prashant A Magdum
- Department of Studies in Chemistry, Karnatak University, Dharwad, Karnataka state, India
| | - Naveen M Gokavi
- Department of Studies in Chemistry, Karnatak University, Dharwad, Karnataka state, India
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46
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Polypeptide-Nanoparticle Interactions and Corona Formation Investigated by Monte Carlo Simulations. Polymers (Basel) 2016; 8:polym8060203. [PMID: 30979300 PMCID: PMC6432162 DOI: 10.3390/polym8060203] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 05/11/2016] [Accepted: 05/12/2016] [Indexed: 12/23/2022] Open
Abstract
Biomacromolecule activity is usually related to its ability to keep a specific structure. However, in solution, many parameters (pH, ionic strength) and external compounds (polyelectrolytes, nanoparticles) can modify biomacromolecule structure as well as acid/base properties, thus resulting in a loss of activity and denaturation. In this paper, the impact of neutral and charged nanoparticles (NPs) is investigated by Monte Carlo simulations on polypeptide (PP) chains with primary structure based on bovine serum albumin. The influence of pH, salt valency, and NP surface charge density is systematically studied. It is found that the PP is extended at extreme pH, when no complex formation is observed, and folded at physiological pH. PP adsorption around oppositely-charged NPs strongly limits chain structural changes and modifies its acid/base properties. At physiological pH, the complex formation occurs only with positively-charged NPs. The presence of salts, in particular those with trivalent cations, introduces additional electrostatic interactions, resulting in a mitigation of the impact of negative NPs. Thus, the corona structure is less dense with locally-desorbed segments. On the contrary, very limited impact of salt cation valency is observed when NPs are positive, due to the absence of competitive effects between multivalent cations and NP.
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47
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Garg DK, Kundu B. Clues for divergent, polymorphic amyloidogenesis through dissection of amyloid forming steps of bovine carbonic anhydrase and its critical amyloid forming stretch. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:794-804. [PMID: 27045222 DOI: 10.1016/j.bbapap.2016.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 03/12/2016] [Accepted: 03/31/2016] [Indexed: 01/23/2023]
Abstract
Certain amino acid stretches are considered 'critical' to trigger amyloidogenesis in a protein. Synthetic peptides corresponding to these stretches are often used as experimental mimics for studying the amyloidogenesis of their parent protein. Here we provide evidence that such simple extrapolation is misleading. We scrutinized each step of amyloid progression of full length bovine carbonic anhydrase (BCA) and compared it with the amyloidogenic process of its critical peptide stretch 201-227 (PepB). We found that under similar solution conditions amyloidogenesis of BCA followed surface-catalyzed secondary nucleation, whereas, that of PepB followed classical nucleation-dependent pathway. AFM images showed that while BCA formed short, thick and branched fibrils, PepB formed thin, long and unbranched fibrils. Structural information obtained by ATR-FTIR spectroscopy suggested parallel arrangement of intermolecular β-sheet in BCA amyloids in contrast to PepB amyloids which arranged into antiparallel β sheets. Amyloids formed by BCA were unable to seed the fibrillation of PepB and vice versa. Even the intermediates formed during lag phase revealed contrasting FTIR and far UV CD signature, hydrophobicity, morphology and cell cytotoxicity. Thus, we propose that sequences other than critical amyloidogenic stretches may significantly influence the initiation, polymerization and final fibrillar morphology of amyloid forming protein. The results have been discussed in light of primary sequence mediated amyloid polymorphism and its importance in the rational design of amyloid nanomaterials possessing desired physico-chemical properties.
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Affiliation(s)
- Dushyant Kumar Garg
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Bishwajit Kundu
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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48
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Meti MD, Nandibewoor ST, Joshi SD, More UA, Chimatadar SA. Binding interaction and conformational changes of human serum albumin with ranitidine studied by spectroscopic and time-resolved fluorescence methods. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0847-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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49
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Bolattin MB, Nandibewoor ST, Chimatadar SA. Biomolecular interaction study of hydralazine with bovine serum albumin and effect ofβ-cyclodextrin on binding by fluorescence, 3D, synchronous, CD, and Raman spectroscopic methods. J Mol Recognit 2016; 29:308-17. [DOI: 10.1002/jmr.2532] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/04/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Mallavva B. Bolattin
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580 003 Karnataka India
| | - Sharanappa T. Nandibewoor
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580 003 Karnataka India
| | - Shivamurti A. Chimatadar
- P. G. Department of Studies in Chemistry; Karnatak University; Pavate Nagar Dharwad 580 003 Karnataka India
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50
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Della Porta V, Bramanti E, Campanella B, Tiné MR, Duce C. Conformational analysis of bovine serum albumin adsorbed on halloysite nanotubes and kaolinite: a Fourier transform infrared spectroscopy study. RSC Adv 2016. [DOI: 10.1039/c6ra12525e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Clay minerals are widely used in pharmaceutical formulations, therefore studying how they interaction with proteins is important because they can alter their biological functions.
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Affiliation(s)
- Valentina Della Porta
- National Research Council of Italy
- C.N.R
- Institute of Chemsitry of Organo Metallic Compounds-ICCOM-UOS Pisa
- 56124 Pisa
- Italy
| | - Emilia Bramanti
- National Research Council of Italy
- C.N.R
- Institute of Chemsitry of Organo Metallic Compounds-ICCOM-UOS Pisa
- 56124 Pisa
- Italy
| | - Beatrice Campanella
- National Research Council of Italy
- C.N.R
- Institute of Chemsitry of Organo Metallic Compounds-ICCOM-UOS Pisa
- 56124 Pisa
- Italy
| | - Maria Rosaria Tiné
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- 56124 Pisa
- Italy
| | - Celia Duce
- University of Pisa
- Dipartimento di Chimica e Chimica Industriale
- 56124 Pisa
- Italy
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