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Effect of Antihypertensive Drug (Chlorothiazide) on Fibrillation of Lysozyme: A Combined Spectroscopy, Microscopy, and Computational Study. Int J Mol Sci 2023; 24:ijms24043112. [PMID: 36834523 PMCID: PMC9959601 DOI: 10.3390/ijms24043112] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/14/2023] [Accepted: 01/18/2023] [Indexed: 02/08/2023] Open
Abstract
Amyloid fibrils abnormally accumulate together in the human body under certain conditions, which can result in lethal conditions. Thus, blocking this aggregation may prevent or treat this disease. Chlorothiazide (CTZ) is a diuretic and is used to treat hypertension. Several previous studies suggest that diuretics prevent amyloid-related diseases and reduce amyloid aggregation. Thus, in this study we examine the effects of CTZ on hen egg white lysozyme (HEWL) aggregation using spectroscopic, docking, and microscopic approaches. Our results showed that under protein misfolding conditions of 55 °C, pH 2.0, and 600 rpm agitation, HEWL aggregated as evidenced by the increased turbidity and Rayleigh light scattering (RLS). Furthermore, thioflavin-T, as well as trans electron microscope (TEM) analysis confirmed the formation of amyloid structures. An anti-aggregation effect of CTZ is observed on HEWL aggregations. Circular dichroism (CD), TEM, and Thioflavin-T fluorescence show that both CTZ concentrations reduce the formation of amyloid fibrils as compared to fibrillated. The turbidity, RLS, and ANS fluorescence increase with CTZ increasing. This increase is attributed to the formation of a soluble aggregation. As evidenced by CD analysis, there was no significant difference in α-helix content and β-sheet content between at 10 µM CTZ and 100 µM. A TEM analysis of HEWL coincubated with CTZ at different concentrations validated all the above-mentioned results. The TEM results show that CTZ induces morphological changes in the typical structure of amyloid fibrils. The steady-state quenching study demonstrated that CTZ and HEWL bind spontaneously via hydrophobic interactions. HEWL-CTZ also interacts dynamically with changes in the environment surrounding tryptophan. Computational results revealed the binding of CTZ to ILE98, GLN57, ASP52, TRP108, TRP63, TRP63, ILE58, and ALA107 residues in HEWL via hydrophobic interactions and hydrogen bonds with a binding energy of -6.58 kcal mol-1. We suggest that at 10 µM and 100 μM, CTZ binds to the aggregation-prone region (APR) of HEWL and stabilizes it, thus preventing aggregation. Based on these findings, we can conclude that CTZ has antiamyloidogenic activity and can prevent fibril aggregation.
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Cerón R, Peimbert M, Rojo-Domínguez A, Nájera H. Hen lysozyme fibrillogenesis, molten globule intermediate and effect of copper salts. J Biomol Struct Dyn 2023; 41:423-434. [PMID: 34821199 DOI: 10.1080/07391102.2021.2006090] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The amyloid fibres have been related to many diseases. The molten globule intermediate has been proposed to form part of the folding pathway of many proteins. In the present study, we investigated the mechanism of amyloid-fibres formation of hen egg-white lysozyme (HEWL) incubated in a potassium phosphate buffer, pH 11.8, 100 mM, at 37 °C for 30 h, and evaluated the influence of Cu(II) present in two salts (CuSO4 and CuCl2) during fibrillogenesis. Co-incubation and post-incubation of lysozyme with copper salts reduced the fluorescence signal of thioflavin T with an increment in the intrinsic fluorescence of the protein. The ANS fluorescence test showed that incubation of HEWL for 6 h generated a molten globule intermediate state that formed amyloid fibres when incubation was carried out for a 30-h timespan. Dynamic light scattering showed a heterogeneous population of states in samples incubated in the absence or the presence of salts during the fibrillation process. The existence of a reducing potential was verified during the formation of HEWL amyloid fibres with the bathocuproine disulphonate test. Transmission electron microscopy confirmed the presence and absence of fibres in solutions incubated with and without Cu(II). This work demonstrated that lysozyme formed amyloid fibres at 37 °C and copper inhibited its formation.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Ricardo Cerón
- Posgrado en Ciencias Naturales e Ingeniería, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico.,Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Mariana Peimbert
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Arturo Rojo-Domínguez
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
| | - Hugo Nájera
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana-Cuajimalpa, Mexico City, Mexico
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3
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Banerjee S. Biophysical and mass spectrometry based characterization of methylglyoxal-modified myoglobin: Role of advanced glycation end products in inducing protein structural alterations. Int J Biol Macromol 2021; 193:2165-2172. [PMID: 34774865 DOI: 10.1016/j.ijbiomac.2021.11.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 09/08/2021] [Accepted: 11/05/2021] [Indexed: 11/25/2022]
Abstract
Methylglyoxal (MG) is a highly reactive α-dicarbonyl compound which reacts with proteins to form advanced glycation end products (AGEs). MG-induced AGE (MAGE) formation is particularly significant in diabetic condition. In the current study, we have undertaken a time-dependant characterization of MG-modified myoglobin following incubation of the heme protein with the α-dicarbonyl compound for different time periods. Interestingly, mass spectrometric studies indicated modifications at two specific lysine residues, Lys-87 and Lys-133. The AGE adducts identified at Lys-87 were carboxymethyllysine and carboxyethyllysine, while those detected at Lys-133 included pyrraline-carboxymethyllysine and carboxyethyllysine, respectively. Far-UV CD studies revealed a decrease in the native α-helical content of the heme protein gradually with increasing time of MG incubation. In addition, MG modification was found to induce changes in tertiary structure as well as surface hydrophobicity of the heme protein. MG-derived AGE adducts thus appear to alter the structure of Mb considerably. Considering the increased level of MG in diabetic condition, the current study appears physiologically relevant in terms of understanding AGE-mediated protein modification and subsequent structural changes.
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Affiliation(s)
- Sauradipta Banerjee
- Department of Biophysics, Molecular Biology & Bioinformatics, University of Calcutta, 92, Acharyya Prafulla Chandra Road, Kolkata 700009, India.
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Feng Z, Li Y, Bai Y. Elevated temperatures accelerate the formation of toxic amyloid fibrils of hen egg-white lysozyme. Vet Med Sci 2021; 7:1938-1947. [PMID: 33978313 PMCID: PMC8464291 DOI: 10.1002/vms3.522] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 03/17/2021] [Accepted: 04/22/2021] [Indexed: 11/17/2022] Open
Abstract
The formation of amyloid fibrils is critical for neurodegenerative diseases. Some physiochemical conditions can promote the conversion of proteins from soluble globular shapes into insoluble well‐organized amyloid fibrils. The aim of this study was to investigate the effect of temperatures on amyloid fibrils formation in vitro using the protein model of hen egg‐white lysozyme (HEWL). The HEWL fibrils were prepared at temperatures of 37, 45, 50 and 57°C in glycine solution of pH 2.2. Under transmission electron microscopy, we found the well‐organized HEWL amyloid fibrils at temperatures of 45, 50 and 57°C after 10 days of incubation. Thioflavin T and Congo red florescence assays confirmed that the formation and growth of HEWL fibrils displayed a temperature‐dependent increase, and 57°C produced the most amounts. Meanwhile, the surface hydrophobicity of aggregates was greatly increased by ANS binding assay, and β‐sheet contents by circular dichroism analysis were increased by 17.8%, 22.0% and 34.9%, respectively. Furthermore, the HEWL fibrils formed at 57°C caused significant cytotoxicity in SH‐SY5Y cells after 48 hr exposure, and the cell viability determined by MTT assay was decreased, with 81.35 ± 0.29% for 1 μM, 61.45 ± 2.62% for 2 μM, and 11.58 ± 0.39% (p < .01) for 3 μM. Nuclear staining results also confirmed the apoptosis features. These results suggest that the elevated temperatures could accelerate protein unfolding of the native structure and formation of toxic amyloid fibrils, which can improve understanding the mechanisms of the unfolding and misfolding process of prion protein.
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Affiliation(s)
- Zili Feng
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, P.R. China
| | - Ying Li
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, P.R. China
| | - Yu Bai
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, P.R. China
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Amyloid Aggregates of Smooth-Muscle Titin Impair Cell Adhesion. Int J Mol Sci 2021; 22:ijms22094579. [PMID: 33925514 PMCID: PMC8123791 DOI: 10.3390/ijms22094579] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/21/2021] [Accepted: 04/24/2021] [Indexed: 11/17/2022] Open
Abstract
Various amyloid aggregates, in particular, aggregates of amyloid β-proteins, demonstrate in vitro and in vivo cytotoxic effects associated with impairment of cell adhesion. We investigated the effect of amyloid aggregates of smooth-muscle titin on smooth-muscle-cell cultures. The aggregates were shown to impair cell adhesion, which was accompanied by disorganization of the actin cytoskeleton, formation of filopodia, lamellipodia, and stress fibers. Cells died after a 72-h contact with the amyloid aggregates. To understand the causes of impairment, we studied the effect of the microtopology of a titin-amyloid-aggregate-coated surface on fibroblast adhesion by atomic force microscopy. The calculated surface roughness values varied from 2.7 to 4.9 nm, which can be a cause of highly antiadhesive properties of this surface. As all amyloids have the similar structure and properties, it is quite likely that the antiadhesive effect is also intrinsic to amyloid aggregates of other proteins. These results are important for understanding the mechanisms of the negative effect of amyloids on cell adhesion.
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Banerjee S. Long-term incubation of myoglobin with glyoxal induces amyloid like aggregation of the heme protein: Implications of advanced glycation end products in protein conformational disorders. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Banerjee S. Effect of glyoxal and 1-methylisatin on stress-induced fibrillation of Hen Egg White Lysozyme: Insight into the anti-amyloidogenic property of the compounds with possible therapeutic implications. Int J Biol Macromol 2020; 165:1552-1561. [DOI: 10.1016/j.ijbiomac.2020.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/26/2020] [Accepted: 10/02/2020] [Indexed: 10/23/2022]
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8
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Shahnawaz Khan M, Tabrez S, Rehman MT, Alokail MS. Al (III) metal augment thermal aggregation and fibrillation in protein: Role of metal toxicity in neurological diseases. Saudi J Biol Sci 2020; 27:2221-2226. [PMID: 32874119 PMCID: PMC7451595 DOI: 10.1016/j.sjbs.2020.05.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/17/2020] [Accepted: 05/03/2020] [Indexed: 02/06/2023] Open
Abstract
Protein fibrillation is a leading cause of innumerable neurodegenerative diseases. The exact underlying mechanism associated with the formation of fibrils is yet to be known. Recently, the role of metal ions resulting into fibrillation of proteins has gained attention of the scientific community. In this piece of work, we have investigated the effect of the aluminum (Al) metal ion on the kinetics of aggregation of bovine serum albumin (BSA) protein under physiological conditions by employing several biophysical and microscopic techniques. Quenching of tryptophan fluorescence was observed along with 9 nm blue shift, demonstrating BSA becomes more hydrophobic during unfolding pathway of thermal denaturation. Moreover, ANS (8-Anilino-1-naphthalene sulfonic acid) binding shows quenching in fluorescence intensity with increasing time of incubation at 65 °C, suggesting unfolding leading to the disruption of hydrophobic patches in BSA. Besides, Thioflavin T intensity indicated a significant acceleration in BSA fibrillation at a ratio of 1:1 and 1:2 of BSA and Al (III) metal ion respectively. In addition, circular dichroism (CD) spectroscopy study revealed the transition of BSA from α-helical conformation to the β-sheet rich structure. Molecular docking analysis demonstrated significant binding affinity (-1.2 kcal/mol) of Al (III) with BSA involving Phe501, Phe506, Val575, Thr578, Gln579, Leu531 residues. Transmission electron microscopy (TEM) reaffirm augmentation of thermal-induced BSA fibril formation in the presence of Al (III) metal ions. This study highlights the metal chelating potency as the possible therapeutic target for neurological diseases.
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Affiliation(s)
- Mohd Shahnawaz Khan
- Protein Research Chair, Department of Biochemistry, College of Sciences, King, Saud University, Riyadh, Saudi Arabia
| | - Shams Tabrez
- King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Majed S. Alokail
- Protein Research Chair, Department of Biochemistry, College of Sciences, King, Saud University, Riyadh, Saudi Arabia
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9
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Banerjee S. Methylglyoxal modification reduces the sensitivity of hen egg white lysozyme to stress-induced aggregation: Insight into the anti-amyloidogenic property of α-dicarbonyl compound. J Biomol Struct Dyn 2019; 38:5474-5487. [PMID: 31814530 DOI: 10.1080/07391102.2019.1702589] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The reactive α-oxoaldehyde, methylglyoxal reacts with different proteins to form Advanced Glycation End Products (AGEs) through Maillard reaction. Its level increases significantly in diabetic condition. Here, we have investigated the effect of different concentrations of methylglyoxal (200-400 µM) on the monomeric protein, hen egg white lysozyme (HEWL) following incubation for 3 weeks. Reaction of methylglyoxal with HEWL induced considerable changes in tertiary structure of the protein, but no significant alteration in secondary structure, as evident from different spectroscopic and biophysical studies. Interestingly, methylglyoxal modification was found to enhance the thermal stability of the protein and reduce its sensitivity to stress-induced aggregation. Finally, peptide mass fingerprinting revealed modification of arginine (Arg-45, Arg-14, Arg-68 or Arg-72) and lysine (Lys-116) residues of the protein to AGE adducts, namely, hydroimidazolone, tetrahydropyrimidine, and carboxyethyllysine. Methylglyoxal-derived AGE adducts (MAGE) appear to be responsible for the observed changes in protein. As demonstrated in the present study, the findings may highlight a possible therapeutic potential of the α-oxoaldehyde against protein misfolding and conformational disorder.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sauradipta Banerjee
- School of Chemical Sciences, Indian Association for the Cultivation of Sciences, Kolkata, India
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10
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Furkan M, Sidddiqi MK, Khan AN, Khan RH. An antibiotic (sulfamethoxazole) stabilizes polypeptide (human serum albumin) even under extreme condition (elevated temperature). Int J Biol Macromol 2019; 135:337-343. [DOI: 10.1016/j.ijbiomac.2019.05.152] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 05/03/2019] [Accepted: 05/14/2019] [Indexed: 10/26/2022]
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Protein misfolding, aggregation and mechanism of amyloid cytotoxicity: An overview and therapeutic strategies to inhibit aggregation. Int J Biol Macromol 2019; 134:1022-1037. [PMID: 31128177 DOI: 10.1016/j.ijbiomac.2019.05.109] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Revised: 05/18/2019] [Accepted: 05/18/2019] [Indexed: 12/18/2022]
Abstract
Protein and peptides are converted from their soluble forms into highly ordered fibrillar aggregates under various conditions inside the cell. Such transitions confer diverse neurodegenerative diseases including Alzheimer's disease, Huntington's disease Prion's disease, Parkinson's disease, polyQ and share abnormal folding of potentially cytotoxic protein species linked with degeneration and death of precise neuronal populations. Presently, major advances are made to understand and get detailed insight into the structural basis and mechanism of amyloid formation, cytotoxicity and therapeutic approaches to combat them. Here we highlight classifies and summarizes the detailed overview of protein misfolding and aggregation at their molecular level including the factors that promote protein aggregation under in vivo and in vitro conditions. In addition, we describe the recent technologies that aid the characterization of amyloid aggregates along with several models that might be responsible for amyloid induced cytotoxicity to cells. Overview on the inhibition of amyloidosis by targeting different small molecules (both natural and synthetic origin) have been also discussed, that provides important approaches to identify novel targets and develop specific therapeutic strategies to combat protein aggregation related neurodegenerative diseases.
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12
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Khan MV, Zakariya SM, Khan RH. Protein folding, misfolding and aggregation: A tale of constructive to destructive assembly. Int J Biol Macromol 2018; 112:217-229. [DOI: 10.1016/j.ijbiomac.2018.01.099] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/04/2018] [Accepted: 01/14/2018] [Indexed: 12/20/2022]
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13
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Nusrat S, Zaman M, Masroor A, Siddqi MK, Zaidi N, Neelofar K, Abdelhameed AS, Khan RH. Deciphering the enhanced inhibitory, disaggregating and cytoprotective potential of promethazine towards amyloid fibrillation. Int J Biol Macromol 2018; 106:851-863. [DOI: 10.1016/j.ijbiomac.2017.08.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/12/2017] [Accepted: 08/13/2017] [Indexed: 11/26/2022]
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14
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Nusrat S, Zaidi N, Siddiqi MK, Zaman M, Siddique IA, Ajmal MR, Abdelhameed AS, Khan RH. Anti-Parkinsonian L-Dopa can also act as anti-systemic amyloidosis—A mechanistic exploration. Int J Biol Macromol 2017; 99:630-640. [DOI: 10.1016/j.ijbiomac.2017.03.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 03/05/2017] [Accepted: 03/06/2017] [Indexed: 01/15/2023]
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15
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Sequestration of Ribosome during Protein Aggregate Formation: Contribution of ribosomal RNA. Sci Rep 2017; 7:42017. [PMID: 28169307 PMCID: PMC5294636 DOI: 10.1038/srep42017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Accepted: 01/06/2017] [Indexed: 12/21/2022] Open
Abstract
An understanding of the mechanisms underlying protein aggregation and cytotoxicity of the protein aggregates is crucial in the prevention of several diseases in humans. Ribosome, the cellular protein synthesis machine is capable of acting as a protein folding modulator. The peptidyltransferase center residing in the domain V of large ribosomal subunit 23S rRNA is the centre for the protein folding ability of the ribosome and is also the cellular target of several antiprion compounds. Our in vitro studies unexpectedly reveal that the partial unfolding or aggregation of lysozyme under reducing conditions in presence of the ribosome can induce aggregation of ribosomal components. Electrostatic interactions complemented by specific rRNA-protein interaction drive the ribosome-protein aggregation process. Under similar conditions the rRNA, especially the large subunit rRNA and in vitro transcribed RNA corresponding to domain V of 23S rRNA (bDV RNA) stimulates lysozyme aggregation leading to RNA-protein aggregate formation. Protein aggregation during the refolding of non-disulfide containing protein BCAII at high concentrations also induces ribosome aggregation. BCAII aggregation was also stimulated in presence of the large subunit rRNA. Our observations imply that the specific sequestration of the translation machine by aggregating proteins might contribute to their cytotoxicity.
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Sanjeev A, Sahu RK, Mattaparthi VSK. Potential of mean force and molecular dynamics study on the transient interactions between α and β synuclein that drive inhibition of α-synuclein aggregation. J Biomol Struct Dyn 2016; 35:3342-3353. [DOI: 10.1080/07391102.2016.1254119] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Airy Sanjeev
- Molecular Modelling and Simulation Lab, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784 028, Assam, India
| | - Ravi Kumar Sahu
- Molecular Modelling and Simulation Lab, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784 028, Assam, India
| | - Venkata Satish Kumar Mattaparthi
- Molecular Modelling and Simulation Lab, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur 784 028, Assam, India
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Javadi S, Yousefi R, Hosseinkhani S, Tamaddon AM, Uversky VN. Protective effects of carnosine on dehydroascorbate-induced structural alteration and opacity of lens crystallins: important implications of carnosine pleiotropic functions to combat cataractogenesis. J Biomol Struct Dyn 2016; 35:1766-1784. [PMID: 27472261 DOI: 10.1080/07391102.2016.1194230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The high level of dehydroascorbic acid (DHA) in the lenticular tissue is an important risk factor for the development of age-related cataracts. In this study, the effects of DHA on structure and function of lens crystallins were studied in the presence of carnosine using gel mobility shift assay, different spectroscopic techniques, and lens culture analysis. The DHA-induced unfolding and aggregation of lens proteins were largely prevented by this endogenous dipeptide. The ability of carnosine to preserve native protein structure upon exposure to DHA suggests the essential role of this dipeptide in prevention of the senile cataract development. Although the DHA-modified α-crystallin was characterized by altered chaperone activity, functionality of this protein was significantly restored in the presence of carnosine. The increased proteolytic instability of DHA-modified lens proteins was also attenuated in the presence of carnosine. Furthermore, the assessment of lens culture suggested that DHA can induce significant lens opacity which can be prevented by carnosine. These observations can be explained by the pleiotropic functions of this endogenous and pharmaceutical compound, notably by its anti-glycation and anti-aggregation properties. In summary, our study suggests that carnosine may have therapeutic potential in preventing senile cataracts linked with the increased lenticular DHA generation, particularly under pathological conditions associated with the oxidative stress.
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Affiliation(s)
- Sajjad Javadi
- a Protein Chemistry Laboratory (PCL), Department of Biology , College of Sciences, Shiraz University , Shiraz , Iran
| | - Reza Yousefi
- a Protein Chemistry Laboratory (PCL), Department of Biology , College of Sciences, Shiraz University , Shiraz , Iran
| | - Saman Hosseinkhani
- b Faculty of Biological Sciences, Department of Biochemistry , Tarbiat Modares University , Tehran , Iran
| | - Ali-Mohammad Tamaddon
- c Center for Nanotechnology in Drug Delivery, School of Pharmacy , Shiraz University of Medical Sciences , Shiraz , Iran
| | - Vladimir N Uversky
- d Department of Molecular Medicine and Byrd Alzheimer's Research Institute, Morsani College of Medicine , University of South Florida , Tampa , FL 33612 , USA
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Kumari M, Dohare N, Maurya N, Dohare R, Patel R. Effect of 1-methyl-3-octyleimmidazolium chloride on the stability and activity of lysozyme: a spectroscopic and molecular dynamics studies. J Biomol Struct Dyn 2016; 35:2016-2030. [DOI: 10.1080/07391102.2016.1204946] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Meena Kumari
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Neeraj Dohare
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Neha Maurya
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Ravins Dohare
- Nonlinear Dynamic Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
| | - Rajan Patel
- Biophysical Chemistry Laboratory, Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia (A Central University), New Delhi 110025, India
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Dutta M, Mattaparthi VSK. Inhibition of Aβ₁-₄₂ peptide aggregation using short ss-oligonucleotide as polyions: an in silico approach. J Biomol Struct Dyn 2016; 35:1401-1406. [PMID: 27174215 DOI: 10.1080/07391102.2016.1189358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mary Dutta
- a Molecular Modelling and Simulation Lab, Department of Molecular Biology and Biotechnology , Tezpur University , Tezpur 784 028 , Assam , India
| | - Venkata Satish Kumar Mattaparthi
- a Molecular Modelling and Simulation Lab, Department of Molecular Biology and Biotechnology , Tezpur University , Tezpur 784 028 , Assam , India
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20
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Zaman M, Zakariya SM, Nusrat S, Khan MV, Qadeer A, Ajmal MR, Khan RH. Surfactant-mediated amyloidogenesis behavior of stem bromelain; a biophysical insight. J Biomol Struct Dyn 2016; 35:1407-1419. [DOI: 10.1080/07391102.2016.1185040] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Masihuz Zaman
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Syed Mohammad Zakariya
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Saima Nusrat
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Mohsin Vahid Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Atiyatul Qadeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Mohammad Rehan Ajmal
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, UP 202002, India
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21
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Vitamin k3 inhibits protein aggregation: Implication in the treatment of amyloid diseases. Sci Rep 2016; 6:26759. [PMID: 27230476 PMCID: PMC4882616 DOI: 10.1038/srep26759] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/29/2016] [Indexed: 12/22/2022] Open
Abstract
Protein misfolding and aggregation have been associated with several human diseases such as Alzheimer’s, Parkinson’s and familial amyloid polyneuropathy etc. In this study, anti-fibrillation activity of vitamin k3 and its effect on the kinetics of amyloid formation of hen egg white lysozyme (HEWL) and Aβ-42 peptide were investigated. Here, in combination with Thioflavin T (ThT) fluorescence assay, circular dichroism (CD), transmission electron microscopy and cell cytotoxicity assay, we demonstrated that vitamin k3 significantly inhibits fibril formation as well as the inhibitory effect is dose dependent manner. Our experimental studies inferred that vitamin k3 exert its neuro protective effect against amyloid induced cytotoxicity through concerted pathway, modifying the aggregation formation towards formation of nontoxic aggregates. Molecular docking demonstrated that vitamin k3 mediated inhibition of HEWL and Aβ-42 fibrillogenesis may be initiated by interacting with proteolytic resistant and aggregation prone regions respectively. This work would provide an insight into the mechanism of protein aggregation inhibition by vitamin k3; pave the way for discovery of other small molecules that may exert similar effect against amyloid formation and its associated neurodegenerative diseases.
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Fazili NA, Bhat IA, Bhat WF, Naeem A. Anti-fibrillation propensity of a flavonoid baicalein against the fibrils of hen egg white lysozyme: potential therapeutics for lysozyme amyloidosis. J Biomol Struct Dyn 2016; 34:2102-14. [DOI: 10.1080/07391102.2015.1108232] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Naveed Ahmad Fazili
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, , India
| | - Imtiyaz Ahmad Bhat
- Department of Chemistry, Faculty of Sciences, Aligarh Muslim University, Aligarh, , India
| | - Waseem Feeroze Bhat
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, , India
| | - Aabgeena Naeem
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, , India
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Chaturvedi SK, Zaidi N, Alam P, Khan JM, Qadeer A, Siddique IA, Asmat S, Zaidi Y, Khan RH. Unraveling Comparative Anti-Amyloidogenic Behavior of Pyrazinamide and D-Cycloserine: A Mechanistic Biophysical Insight. PLoS One 2015; 10:e0136528. [PMID: 26312749 PMCID: PMC4552381 DOI: 10.1371/journal.pone.0136528] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 08/04/2015] [Indexed: 12/24/2022] Open
Abstract
Amyloid fibril formation by proteins leads to variety of degenerative disorders called amyloidosis. While these disorders are topic of extensive research, effective treatments are still unavailable. Thus in present study, two anti-tuberculosis drugs, i.e., pyrazinamide (PYZ) and D-cycloserine (DCS), also known for treatment for Alzheimer's dementia, were checked for the anti-aggregation and anti-amyloidogenic ability on Aβ-42 peptide and hen egg white lysozyme. Results demonstrated that both drugs inhibit the heat induced aggregation; however, PYZ was more potent and decelerated the nucleation phase as observed from various spectroscopic and microscopic techniques. Furthermore, pre-formed amyloid fibrils incubated with these drugs also increased the PC12/SH-SY5Y cell viability as compare to the amyloid fibrils alone; however, the increase was more pronounced for PYZ as confirmed by MTT assay. Additionally, molecular docking study suggested that the greater inhibitory potential of PYZ as compare to DCS may be due to strong binding affinity and more occupancy of hydrophobic patches of HEWL, which is known to form the core of the protein fibrils.
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Affiliation(s)
| | - Nida Zaidi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Parvez Alam
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Javed Masood Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Atiyatul Qadeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Ibrar Ahmad Siddique
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Shamoon Asmat
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Yusra Zaidi
- Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Rizwan Hasan Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
- * E-mail:
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