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Ghosh A, Zhao Y. Nanoparticles that Distinguish Chemical and Supramolecular Contexts of Lysine for Single-Site Functionalization of Protein. NANO LETTERS 2024. [PMID: 38976835 DOI: 10.1021/acs.nanolett.4c02412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/10/2024]
Abstract
Lysine is one of the most abundant residues on the surface of proteins and its site-selective functionalization is extremely challenging. The existing methods of functionalization rely on differential reactivities of lysine on a protein, making it impossible to label less reactive lysines selectively. We here report polymeric nanoparticles that mimic enzymes involved in the posttranslational modifications of proteins that distinguish the chemical and supramolecular contexts of a lysine and deliver the labeling reagent precisely to its ε amino group. The nanoparticles are prepared through molecular imprinting of cross-linkable surfactant micelles, plus an in situ, on-micelle derivatization of the peptide template prior to the imprinting. The procedures encode the polymeric nanoparticles with all the supramolecular information needed for sequence identification and precise labeling, allowing single-site functionalization of a predetermined lysine on the target protein in a mixture.
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Affiliation(s)
- Avijit Ghosh
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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2
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Roy S, Srinivasan VR, Arunagiri S, Mishra N, Bhatia A, Shejale KP, Prajapati KP, Kar K, Anand BG. Molecular insights into the phase transition of lysozyme into amyloid nanostructures: Implications of therapeutic strategies in diverse pathological conditions. Adv Colloid Interface Sci 2024; 331:103205. [PMID: 38875805 DOI: 10.1016/j.cis.2024.103205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 05/13/2024] [Accepted: 05/21/2024] [Indexed: 06/16/2024]
Abstract
Lysozyme, a well-known bacteriolytic enzyme, exhibits a fascinating yet complex behavior when it comes to protein aggregation. Under certain conditions, this enzyme undergoes flexible transformation, transitioning from partially unfolded intermediate units of native conformers into complex cross-β-rich nano fibrillar amyloid architectures. Formation of such lysozyme amyloids has been implicated in a multitude of pathological and medical severities, like hepatic dysfunction, hepatomegaly, splenic rupture as well as spleen dysfunction, nephropathy, sicca syndrome, renal dysfunction, renal amyloidosis, and systemic amyloidosis. In this comprehensive review, we have attempted to provide in-depth insights into the aggregating behavior of lysozyme across a spectrum of variables, including concentrations, temperatures, pH levels, and mutations. Our objective is to elucidate the underlying mechanisms that govern lysozyme's aggregation process and to unravel the complex interplay between its structural attributes. Moreover, this work has critically examined the latest advancements in the field, focusing specifically on novel strategies and systems, that have been implemented to delay or inhibit the lysozyme amyloidogenesis. Apart from this, we have tried to explore and advance our fundamental understanding of the complex processes involved in lysozyme aggregation. This will help the research community to lay a robust foundation for screening, designing, and formulating targeted anti-amyloid therapeutics offering improved treatment modalities and interventions not only for lysozyme-linked amyloidopathy but for a wide range of amyloid-related disorders.
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Affiliation(s)
- Sindhujit Roy
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Venkat Ramanan Srinivasan
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Subash Arunagiri
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Nishant Mishra
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Anubhuti Bhatia
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India
| | - Kiran P Shejale
- Dept. of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, South Korea
| | - Kailash Prasad Prajapati
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Karunakar Kar
- Biophysical and Biomaterials Research Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India..
| | - Bibin Gnanadhason Anand
- Biomolecular Self-Assembly Lab, Department of Biotechnology, School of Bioengineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu 603203, India..
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3
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Ghosh A, Sharma M, Zhao Y. Cell-penetrating protein-recognizing polymeric nanoparticles through dynamic covalent chemistry and double imprinting. Nat Commun 2024; 15:3731. [PMID: 38702306 PMCID: PMC11068882 DOI: 10.1038/s41467-024-48131-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 04/22/2024] [Indexed: 05/06/2024] Open
Abstract
Molecular recognition of proteins is key to their biological functions and processes such as protein-protein interactions (PPIs). The large binding interface involved and an often relatively flat binding surface make the development of selective protein-binding materials extremely challenging. A general method is reported in this work to construct protein-binding polymeric nanoparticles from cross-linked surfactant micelles. Preparation involves first dynamic covalent chemistry that encodes signature surface lysines on a protein template. A double molecular imprinting procedure fixes the binding groups on the nanoparticle for these lysine groups, meanwhile creating a binding interface complementary to the protein in size, shape, and distribution of acidic groups on the surface. These water-soluble nanoparticles possess excellent specificities for target proteins and sufficient affinities to inhibit natural PPIs such as those between cytochrome c (Cytc) and cytochrome c oxidase (CcO). With the ability to enter cells through a combination of energy-dependent and -independent pathways, they intervene apoptosis by inhibiting the PPI between Cytc and the apoptotic protease activating factor-1 (APAF1). Generality of the preparation and the excellent molecular recognition of the materials have the potential to make them powerful tools to probe protein functions in vitro and in cellulo.
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Affiliation(s)
- Avijit Ghosh
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA
| | - Mansi Sharma
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA.
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4
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Abbaspour S, Alijanvand SH, Morshedi D, Shojaosadati SA. Inhibitory effect of plain and functionalized graphene nanoplateles on hen egg white lysozyme fibrillation. Colloids Surf B Biointerfaces 2023; 230:113487. [PMID: 37542838 DOI: 10.1016/j.colsurfb.2023.113487] [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: 05/02/2023] [Revised: 07/22/2023] [Accepted: 07/30/2023] [Indexed: 08/07/2023]
Abstract
Protein fibrillation is a phenomenon associated with misfolding and the production of highly ordered nanofibrils, which may cause serious degenerative diseases such as Parkinson's disease, Alzheimer's disease, and type 2 diabetes. Upon contact with biological fluids, the nanomaterials are immediately covered by proteins and interact with them. In this study, the effects of Graphene NanoPlateles (Plain-GNPs) and their modified forms with a carboxyl group (GNPs -COOH) and an amine group (GNPs -NH2) are evaluated on the fibrillation process of Hen Egg White Lysozyme (HEWL). The fibrillation process of HEWL was studied using thioflavin-T, Circular Dichroism spectrometry, and Atomic Force Microscopy. Plain-GNPs significantly decreased the fibrillation process at different stages, including nucleation, exponential fibrillation phases, and end-mature fibril products. However, GNPs-COOH and GNPs-NH2 affected the final fluorescence of ThT. The species formed in the presence of Plain-GNPs showed less toxicity in SH-SY5Y cells, which could be applicable for therapeutic purposes.
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Affiliation(s)
- Sakineh Abbaspour
- Biotechnology Group Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box: 14115-111, Tehran, the Islamic Republic of Iran; Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box 14965-161, Tehran, the Islamic Republic of Iran
| | - Saeid Hadi Alijanvand
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box 14965-161, Tehran, the Islamic Republic of Iran
| | - Dina Morshedi
- Department of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology, P.O. Box 14965-161, Tehran, the Islamic Republic of Iran
| | - Seyed Abbas Shojaosadati
- Biotechnology Group Faculty of Chemical Engineering, Tarbiat Modares University, P.O. Box: 14115-111, Tehran, the Islamic Republic of Iran.
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5
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The Ability of Some Polysaccharides to Disaggregate Lysozyme Amyloid Fibrils and Renature the Protein. Pharmaceutics 2023; 15:pharmaceutics15020624. [PMID: 36839946 PMCID: PMC9962556 DOI: 10.3390/pharmaceutics15020624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
The deposition of proteins in the form of insoluble amyloid fibril aggregates is linked to a range of diseases. The supramolecular architecture of such deposits is governed by the propagation of β-strands in the direction of protofilament growth. In the present study, we analyze the structural changes of hen egg-white lysozyme fibrils upon their interactions with a range of polysaccharides, using AFM and FTIR spectroscopy. Linear anionic polysaccharides, such as κ-carrageenan and sodium alginate, are shown to be capable to disaggregate protofilaments with eventual protein renaturation. The results help to understand the mechanism of amyloid disaggregation and create a platform for both the development of new therapeutic agents for amyloidose treatment, and the design of novel functional protein-polysaccharide complex-based nanomaterials.
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Nikoo S, Maghari A, Habibi-Rezaei M, Moosavi-Movahedi AA. Mechanistic study of lysozyme glycation by fructose and modulation by curcumin derivatives. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Wang Y, Milewska M, Foster H, Chapman R, Stenzel MH. The Core-Shell Structure, Not Sugar, Drives the Thermal Stabilization of Single-Enzyme Nanoparticles. Biomacromolecules 2021; 22:4569-4581. [PMID: 34617439 DOI: 10.1021/acs.biomac.1c00871] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Trehalose is widely assumed to be the most effective sugar for protein stabilization, but exactly how unique the structure is and the mechanism by which it works are still debated. Herein, we use a polyion complex micelle approach to control the position of trehalose relative to the surface of glucose oxidase within cross-linked and non-cross-linked single-enzyme nanoparticles (SENs). The distribution and density of trehalose molecules in the shell can be tuned by changing the structure of the underlying polymer, poly(N-[3-(dimethylamino)propyl] acrylamide (PDMAPA). SENs in which the trehalose is replaced with sucrose and acrylamide are prepared as well for comparison. Isothermal titration calorimetry, dynamic light scattering, and asymmetric flow field-flow fraction in combination with multiangle light scattering reveal that two to six polymers bind to the enzyme. Binding either trehalose or sucrose close to the enzyme surface has very little effect on the thermal stability of the enzyme. By contrast, encapsulation of the enzyme within a cross-linked polymer shell significantly enhances its thermal stability and increases the unfolding temperature from 70.3 °C to 84.8 °C. Further improvements (up to 92.8 °C) can be seen when trehalose is built into this shell. Our data indicate that the structural confinement of the enzyme is a far more important driver in its thermal stability than the location of any sugar.
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Affiliation(s)
- Yiping Wang
- Centre for Advanced Macromolecular Design (CAMD), School of Chemistry, UNSW Sydney, Kensington, New South Wales 2052, Australia
| | - Malgorzata Milewska
- Department of Organic Chemistry, Bioorganic Chemistry, and Biotechnology, Faculty of Chemistry, Silesian University of Technology, B. Krzywoustego 4, Gliwice 44 100, Poland
| | - Henry Foster
- Centre for Advanced Macromolecular Design (CAMD), School of Chemistry, UNSW Sydney, Kensington, New South Wales 2052, Australia
| | - Robert Chapman
- Centre for Advanced Macromolecular Design (CAMD), School of Chemistry, UNSW Sydney, Kensington, New South Wales 2052, Australia.,School of Environmental and Life Sciences, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia
| | - Martina H Stenzel
- Centre for Advanced Macromolecular Design (CAMD), School of Chemistry, UNSW Sydney, Kensington, New South Wales 2052, Australia
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8
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Wang Y, Wang X, Montclare JK. Free-Standing Photocrosslinked Protein Polymer Hydrogels for Sustained Drug Release. Biomacromolecules 2021; 22:1509-1522. [PMID: 33685120 DOI: 10.1021/acs.biomac.0c01721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The fabrication of protein hydrogels consisting of different properties and functional motifs is critical in the development of protein-based materials for biomedical applications. Here, we report the design and characterization of a triblock protein polymer, CEC, composed of two different self-assembling domains derived from elastin protein (E) and coiled-coil protein (C), photopolymerized with a NHS-diazirine (D) crosslinker into a CEC-D hydrogel. The optimal photocrosslinker concentration and exposure time is determined to fabricate a free-standing hydrogel. Upon increasing the concentration of the CEC-D monomer and environmental temperature, the CEC-D hydrogel's conformation decreases in helical content from 58.0% to 44.8% and increases in β-content from 25.9% to 38.1%. These gels experience 55 ± 6% protein erosion from the free-standing gel in 13 days as the gel films gradually decrease in size. The swelling ratio of 12 ± 1% denotes that the gel has a swelling ability comparable to other protein hydrogels. These photocrosslinked CEC-D hydrogels can be employed for drug delivery with high encapsulation and 14 ± 2% release of curcumin into the supernatant in a week long study. Overall, the photocrosslinked CEC-D hydrogels exhibit stability, swelling ability, and sustained release of drug.
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Affiliation(s)
- Yao Wang
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, New York 11201, United States
| | - Xiaole Wang
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, New York 11201, United States
| | - Jin Kim Montclare
- Department of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, New York 11201, United States.,Department of Chemistry, New York University, New York, New York 10003, United States.,Department of Biomaterials, New York University College of Dentistry, New York, New York 10010, United States.,Department of Radiology, New York University Langone Health, New York, New York 10016, United States
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9
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The concept of protein folding/unfolding and its impacts on human health. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2021. [PMID: 34090616 DOI: 10.1016/bs.apcsb.2021.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Proteins have evolved in specific 3D structures and play different functions in cells and determine various reactions and pathways. The newly synthesized amino acid chains once depart ribosome must crumple into three-dimensional structures so can be biologically active. This process of protein that makes a functional molecule is called protein folding. The protein folding is both a biological and a physicochemical process that depends on the sequence of it. In fact, this process occurs more complicated and in some cases and in exposure to some molecules like glucose (glycation), mistaken folding leads to amyloid structures and fatal disorders called conformational diseases. Such conditions are detected by the quality control system of the cell and these abnormal proteins undergo renovation or degradation. This scenario takes place by the chaperones, chaperonins, and Ubiquitin-proteasome complex. Understanding of protein folding mechanisms from different views including experimental and computational approaches has revealed some intermediate ensembles such as molten globule and has been subjected to biophysical and molecular biology attempts to know more about prevalent conformational diseases.
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10
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Computational Assessment of Bacterial Protein Structures Indicates a Selection Against Aggregation. Cells 2019; 8:cells8080856. [PMID: 31398930 PMCID: PMC6721704 DOI: 10.3390/cells8080856] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/05/2019] [Accepted: 08/06/2019] [Indexed: 12/14/2022] Open
Abstract
The aggregation of proteins compromises cell fitness, either because it titrates functional proteins into non-productive inclusions or because it results in the formation of toxic assemblies. Accordingly, computational proteome-wide analyses suggest that prevention of aggregation upon misfolding plays a key role in sequence evolution. Most proteins spend their lifetimes in a folded state; therefore, it is conceivable that, in addition to sequences, protein structures would have also evolved to minimize the risk of aggregation in their natural environments. By exploiting the AGGRESCAN3D structure-based approach to predict the aggregation propensity of >600 Escherichia coli proteins, we show that the structural aggregation propensity of globular proteins is connected with their abundance, length, essentiality, subcellular location and quaternary structure. These data suggest that the avoidance of protein aggregation has contributed to shape the structural properties of proteins in bacterial cells.
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Jansens KJA, Lambrecht MA, Rombouts I, Monge Morera M, Brijs K, Rousseau F, Schymkowitz J, Delcour JA. Conditions Governing Food Protein Amyloid Fibril Formation-Part I: Egg and Cereal Proteins. Compr Rev Food Sci Food Saf 2019; 18:1256-1276. [PMID: 33336994 DOI: 10.1111/1541-4337.12462] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/26/2019] [Accepted: 05/13/2019] [Indexed: 12/18/2022]
Abstract
Conditions including heating mode, time, temperature, pH, moisture and protein concentration, shear, and the presence of alcohols, chaotropic/reducing agents, enzymes, and/or salt influence amyloid fibril (AF) formation as they can affect the accessibility of amino acid sequences prone to aggregate. As some conditions applied on model protein resemble conditions in food processing unit operations, we here hypothesize that food processing can lead to formation of protein AFs with a compact cross β-sheet structure. This paper reviews conditions and food constituents that affect amyloid fibrillation of egg and cereal proteins. While egg and cereal proteins often coexist in food products, their impact on each other's fibrillation remains unknown. Hen egg ovalbumin and lysozyme form AFs when subjected to moderate heating at acidic pH separately. AFs can also be formed at higher pH, especially in the presence of alcohols or chaotropic/reducing agents. Tryptic wheat gluten digests can form fibrillar structures at neutral pH and maize and rice proteins do so in aqueous ethanol or at acidic pH, respectively.
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Affiliation(s)
- Koen J A Jansens
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium.,Nutrex NV, Achterstenhoek 5, B-2275, Lille, Belgium
| | - Marlies A Lambrecht
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium
| | - Ine Rombouts
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium.,KU Leuven, ECOVO, Kasteelpark Arenberg 21, B-3001, Leuven, Belgium
| | - Margarita Monge Morera
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium
| | - Kristof Brijs
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB, and Dept. of Cellular and Molecular Medicine, KU Leuven, B-3000, Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB, and Dept. of Cellular and Molecular Medicine, KU Leuven, B-3000, Leuven, Belgium
| | - Jan A Delcour
- KU Leuven, Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), Kasteelpark Arenberg 20, B-3001, Leuven, Belgium
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Al-Shabib NA, Khan JM, Malik A, Sen P, Ramireddy S, Chinnappan S, Alamery SF, Husain FM, Ahmad A, Choudhry H, Khan MI, Shahzad SA. Allura red rapidly induces amyloid-like fibril formation in hen egg white lysozyme at physiological pH. Int J Biol Macromol 2019; 127:297-305. [DOI: 10.1016/j.ijbiomac.2019.01.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 12/30/2022]
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13
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Siddiqui MF, Bano B. A biophysical insight into the formation of aggregates upon trifluoroethanol induced structural and conformational changes in garlic cystatin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:7-17. [PMID: 29902773 DOI: 10.1016/j.saa.2018.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/26/2018] [Accepted: 06/02/2018] [Indexed: 06/08/2023]
Abstract
Intrinsic and extrinsic factors are responsible for the transition of soluble proteins into aggregated form. Trifluoroethanol is among such potent extrinsic factor which facilitates the formation of aggregated structure. It disrupts the interactive forces and destabilizes the native structure of the protein. The present study investigates the effect of trifluoroethanol (TFE) on garlic cystatin. Garlic cystatin was incubated with increasing concentration of TFE (0-90% v/v) for 4 h. Incubation of GPC with TFE induces structural changes thereby resulting in the formation of aggregates. Inactivation of garlic phytocystatin was confirmed by cysteine proteinase inhibitory activity. Garlic cystatin at 30% TFE exhibits native-like secondary structure and high ANS fluorescence, thus suggesting the presence of molten globule state. Circular dichroism and FTIR confirmed the transition of the native alpha-helical structure of garlic cystatin to the beta-sheet structure at 60% TFE. Furthermore, increased ThT fluorescence and redshift in Congo red absorbance assay confirmed the presence of aggregates. Rayleigh and turbidity assay was also performed to validate the aggregation results. Scanning electron microscopy was followed to analyze the morphological changes which confirm the presence of sheath-like structure at 60% TFE. The study sheds light on the conformational behavior of a plant protein when kept under stress condition induced by an extrinsic factor.
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Affiliation(s)
| | - Bilqees Bano
- Department of Biochemistry, Aligarh Muslim University, Uttar Pradesh, India.
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14
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Zhou D, Yang T, Qian W, Xing M, Luo G. Study of the mechanism of environmentally friendly translucent balsa-modified lysozyme dressing for facilitating wound healing. Int J Nanomedicine 2018; 13:4171-4187. [PMID: 30046241 PMCID: PMC6054277 DOI: 10.2147/ijn.s165075] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Objective This study aimed to prepare an eco-friendly dressing using a balsa-derived membrane with lysozymes designed for antibacterial purposes. Methods The groups included controls, balsa (group A), translucent balsa (group B), translucent balsa–lysozymes (group C), and translucent balsa-modified lysozymes (group D). Physical and chemical methods were used to characterize the materials, and the function of the materials was evaluated by in vivo and in vitro experiments. Results Antibacterial activity against Escherichia coli and Staphylococcus aureus was ordered D > C > B ≈ A (P<0.05). Healing rates in the control, A, B, C, and D groups were 30.6%, 48.3%, 56.7%, 70.9%, and 79.2%, respectively at 7 days after injury. The lengths of new epithelia of the wound surface were ordered D > C > B ≈ A > control (P<0.05). Reverse-transcription polymerase chain reaction showed that expression of Wnt3a, β-catenin, and PCNA mRNA were ordered D > C > B ≈ A > control (P<0.05). The order of expression of PCNA was D > C > B ≈ A > control (P<0.05). There were no differences in GSK3β expression (P>0.05). The order of expression of axin was D < C < B ≈ A < control (P<0.05). The cell-migration rate at 24 hours was ordered D > C > B ≈ A > control (P<0.05). Conclusion This translucent balsa-modified lysozyme dressing is characterized by strong antibacterial properties, stable and persistent release, no cytotoxicity, and capacity to promote antibacterial ability and epithelial growth, as well as cell proliferation and migration.
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Affiliation(s)
- Daijun Zhou
- Institute of Burn Research; State Key Laboratory of Trauma, Burn and Combined Injury; Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China, ;
| | - Tao Yang
- Institute of Burn Research; State Key Laboratory of Trauma, Burn and Combined Injury; Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China, ;
| | - Wei Qian
- Institute of Burn Research; State Key Laboratory of Trauma, Burn and Combined Injury; Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China, ;
| | - Malcolm Xing
- Institute of Burn Research; State Key Laboratory of Trauma, Burn and Combined Injury; Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China, ;
| | - Gaoxing Luo
- Institute of Burn Research; State Key Laboratory of Trauma, Burn and Combined Injury; Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China, ;
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15
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Inhibition of amyloid fibrillation of lysozyme by bisdemethoxycurcumin and diacetylbisdemethoxycurcumin. Biophys Chem 2018; 235:56-65. [DOI: 10.1016/j.bpc.2018.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 02/07/2018] [Accepted: 02/09/2018] [Indexed: 11/19/2022]
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16
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Jangholi A, Ashrafi-Kooshk MR, Arab SS, Karima S, Poorebrahim M, Ghadami SA, Moosavi-Movahedi AA, Khodarahmi R. Can any “non-specific charge modification within microtubule binding domains of Tau” be a prerequisite of the protein amyloid aggregation? An in vitro study on the 1N4R isoform. Int J Biol Macromol 2018; 109:188-204. [DOI: 10.1016/j.ijbiomac.2017.12.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 12/07/2017] [Accepted: 12/11/2017] [Indexed: 01/26/2023]
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17
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Azami-Movahed M, Meratan AA, Ghasemi A, Ebrahim-Habibi A, Nemat-Gorgani M. Acetylation of lysine residues in apomyoglobin: Structural changes, amyloid fibrillation, and role of surface charge. Int J Biol Macromol 2018; 107:626-634. [DOI: 10.1016/j.ijbiomac.2017.09.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 09/11/2017] [Accepted: 09/13/2017] [Indexed: 12/21/2022]
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18
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Kachooei E, Mozaffarian F, Khodagholi F, Sadeghi P, Karami L, Ghasemi A, Vahdat E, Saboury AA, Sheibani N, Moosavi-Movahedi AA. Paclitaxel inhibited lysozyme fibrillation by increasing colloidal stability through formation of "off-pathway" oligomers. Int J Biol Macromol 2018; 111:870-879. [PMID: 29352977 DOI: 10.1016/j.ijbiomac.2018.01.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 12/13/2022]
Abstract
Protein fibrillation is a challenging issue in medicine, causing many diseases, and an impediment to pharmaceutics and protein industry. Many chemicals, especially polyphenol compounds and aromatic small molecules, have been widely used as an effective strategy to combat protein fibril formation. Hence, understanding mechanisms of fibrillation inhibition and contributing forces in this process are significant. In this study, the inhibitory effect of paclitaxel on lysozyme fibrillation was investigated with respect to thermal and colloidal stability. Fibrillation was monitored with ThT fluorescence, circular dichroism, and AFM; paclitaxel-lysozyme interaction with isothermal titration calorimetry and docking; thermal and colloidal stability with differential scanning calorimetry and zeta-pulse, respectively. Paclitaxel inhibited lysozyme fibrillation, and interacted with lysozyme through hydrogen bonds and van der Waals' interactions. The viability of PC12 cells retrieved as a result of fibrillation inhibition by paclitaxel. Hydrophobic forces dominantly shielded the aggregation-prone region of lysozyme and suppressed the effective interactions between lysozyme monomers. Although paclitaxel did not affect lysozyme's thermal stability, it increased lysozyme's colloidal stability by either increasing the surface charge density or charge distribution on lysozyme. In conclusion, our results suggest a model for paclitaxel's inhibitory role through two complementary steps driving to "off-pathway" oligomer formation and attenuation of fibril formation.
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Affiliation(s)
- Ehsan Kachooei
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Faroogh Mozaffarian
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Payam Sadeghi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Karami
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Elham Vahdat
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran
| | - Nader Sheibani
- Departments of Ophthalmology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Ali Akbar Moosavi-Movahedi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran; Center of Excellence in Biothermodynamics, University of Tehran, Tehran, Iran.
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19
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Akbari A, Bamdad F, Wu J. Chaperone-like food components: from basic concepts to food applications. Food Funct 2018; 9:3597-3609. [DOI: 10.1039/c7fo01902e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The significance of chaperones in preventing protein aggregation including amyloid fibril formation has been extensively documented in the biological field, but there is limited research on the potential effect of chaperone-like molecules on food protein functionality and food quality.
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Affiliation(s)
- Ali Akbari
- Department of Agricultural
- Food and Nutritional Science
- University of Alberta
- Edmonton
- Canada T6G2P5
| | - Fatemeh Bamdad
- Faculty of Pharmacy and Pharmaceutical Sciences
- University of Alberta
- Edmonton
- Canada T6G 2E1
| | - Jianping Wu
- Department of Agricultural
- Food and Nutritional Science
- University of Alberta
- Edmonton
- Canada T6G2P5
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20
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Xue C, Lee YK, Tran J, Chang D, Guo Z. A mix-and-click method to measure amyloid-β concentration with sub-micromolar sensitivity. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170325. [PMID: 28878984 PMCID: PMC5579099 DOI: 10.1098/rsos.170325] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 07/13/2017] [Indexed: 05/27/2023]
Abstract
Aggregation of amyloid-β (Aβ) protein plays a central role in Alzheimer's disease. Because protein aggregation is a concentration-dependent process, rigorous investigations require accurate concentration measurements. Owing to the high aggregation propensity of Aβ protein, working solutions of Aβ are typically in the low micromolar range. Therefore, an ideal Aβ quantification method requires high sensitivity without sacrificing speed and accuracy. Absorbance at 280 nm is frequently used to measure Aβ concentration, but the sensitivity is low with only one tyrosine and no tryptophan residues in the Aβ sequence. Here we present a fluorescence method for Aβ quantification using fluorescamine, which gives high fluorescence upon reaction with primary amines. We show that, using hen egg white lysozyme as a standard, fluorescence correlates linearly with primary amine concentration across a wide range of fluorescamine concentrations, from 62.5 to 1000 µM. The maximal sensitivity of detection is achieved at a fluorescamine concentration of 250 µM or higher. The fluorescamine method is compatible with the presence of dimethyl sulfoxide, which is commonly used in the preparation of Aβ oligomers, and limits the use of absorbance at 280 nm due to its high background reading. Using aggregation kinetics, we show that the fluorescamine method gives accurate concentration measurements at low micromolar range and leads to highly consistent aggregation data. We recommend the fluorescamine assay to be used for routine and on-the-fly concentration determination in Aβ oligomerization and fibrillization experiments.
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Affiliation(s)
| | | | | | | | - Zhefeng Guo
- Author for correspondence: Zhefeng Guo e-mail:
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21
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Maleki B, Tabandeh F, Soheili ZS, Morshedi D. Application of proteinous nanofibrils to culture retinal pigmented epithelium cells: A versatile biomaterial. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Kuo CT, Chen YL, Hsu WT, How SC, Cheng YH, Hsueh SS, Liu HS, Lin TH, Wu JW, Wang SSS. Investigating the effects of erythrosine B on amyloid fibril formation derived from lysozyme. Int J Biol Macromol 2017; 98:159-168. [DOI: 10.1016/j.ijbiomac.2017.01.110] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 01/11/2017] [Accepted: 01/25/2017] [Indexed: 10/20/2022]
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23
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Furkan M, Rizvi A, Alam MT, Naeem A. Peroxidase improves the activity of catalase by preventing aggregation during TFE-induced denaturation. J Biomol Struct Dyn 2017; 36:551-560. [DOI: 10.1080/07391102.2017.1287007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Mohammad Furkan
- Faculty of Life Sciences, Department of Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Asim Rizvi
- Faculty of Life Sciences, Department of Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Md Tauqir Alam
- Faculty of Life Sciences, Department of Biochemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Aabgeena Naeem
- Faculty of Life Sciences, Department of Biochemistry, Aligarh Muslim University, Aligarh 202002, India
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24
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Chinisaz M, Ebrahim-Habibi A, Dehpour AR, Yaghmaei P, Parivar K, Moosavi-Movahedi AA. Structure and function of anhydride-modified forms of human insulin: In silico, in vitro and in vivo studies. Eur J Pharm Sci 2017; 96:342-350. [DOI: 10.1016/j.ejps.2016.09.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 09/19/2016] [Accepted: 09/21/2016] [Indexed: 01/20/2023]
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25
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Kuczyńska-Wiśnik D, Moruno-Algara M, Stojowska-Swędrzyńska K, Laskowska E. The effect of protein acetylation on the formation and processing of inclusion bodies and endogenous protein aggregates in Escherichia coli cells. Microb Cell Fact 2016; 15:189. [PMID: 27832787 PMCID: PMC5105262 DOI: 10.1186/s12934-016-0590-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 11/03/2016] [Indexed: 12/21/2022] Open
Abstract
Background Acetylation of lysine residues is a reversible post-translational modification conserved from bacteria to humans. Several recent studies have revealed hundreds of lysine-acetylated proteins in various bacteria; however, the physiological role of these modifications remains largely unknown. Since lysine acetylation changes the size and charge of proteins and thereby may affect their conformation, we assumed that lysine acetylation can stimulate aggregation of proteins, especially for overproduced recombinant proteins that form inclusion bodies. Results To verify this assumption, we used Escherichia coli strains that overproduce aggregation-prone VP1GFP protein. We found that in ΔackA-pta cells, which display diminished protein acetylation, inclusion bodies were formed with a delay and processed faster than in the wild-type cells. Moreover, in ΔackA-pta cells, inclusion bodies exhibited significantly increased specific GFP fluorescence. In CobB deacetylase-deficient cells, in which protein acetylation was enhanced, the formation of inclusion bodies was increased and their processing was significantly inhibited. Similar results were obtained with regard to endogenous protein aggregates formed during the late stationary phase in ΔackA-pta and ΔcobB cells. Conclusions Our studies revealed that protein acetylation affected the aggregation of endogenous E. coli proteins and the yield, solubility, and biological activity of a model recombinant protein. In general, decreased lysine acetylation inhibited the formation of protein aggregates, whereas increased lysine acetylation stabilized protein aggregates. These findings should be considered during the designing of efficient strategies for the production of recombinant proteins in E. coli cells. Electronic supplementary material The online version of this article (doi:10.1186/s12934-016-0590-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Dorota Kuczyńska-Wiśnik
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308, Gdansk, Poland
| | - María Moruno-Algara
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308, Gdansk, Poland
| | - Karolina Stojowska-Swędrzyńska
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308, Gdansk, Poland
| | - Ewa Laskowska
- Department of General and Medical Biochemistry, Faculty of Biology, University of Gdansk, Wita Stwosza 59, 80-308, Gdansk, Poland.
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26
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Amyloid-like aggregates formation by bovine apo-carbonic anhydrase in various alcohols: A comparative study. Int J Biol Macromol 2016; 92:573-580. [DOI: 10.1016/j.ijbiomac.2016.07.083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 07/11/2016] [Accepted: 07/24/2016] [Indexed: 12/31/2022]
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27
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Schrader T, Bitan G, Klärner FG. Molecular tweezers for lysine and arginine - powerful inhibitors of pathologic protein aggregation. Chem Commun (Camb) 2016; 52:11318-34. [PMID: 27546596 PMCID: PMC5026632 DOI: 10.1039/c6cc04640a] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Molecular tweezers represent the first class of artificial receptor molecules that have made the way from a supramolecular host to a drug candidate with promising results in animal tests. Due to their unique structure, only lysine and arginine are well complexed with exquisite selectivity by a threading mechanism, which unites electrostatic, hydrophobic and dispersive attraction. However, tweezer design must avoid self-dimerization, self-inclusion and external guest binding. Moderate affinities of molecular tweezers towards sterically well accessible basic amino acids with fast on and off rates protect normal proteins from potential interference with their biological function. However, the early stages of abnormal Aβ, α-synuclein, and TTR assembly are redirected upon tweezer binding towards the generation of amorphous non-toxic materials that can be degraded by the intracellular and extracellular clearance mechanisms. Thus, specific host-guest chemistry between aggregation-prone proteins and lysine/arginine binders rescues cell viability and restores animal health in models of AD, PD, and TTR amyloidosis.
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Affiliation(s)
- Thomas Schrader
- Faculty of Chemistry, University of Duisburg-Essen, Essen, Germany.
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28
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Højgaard C, Kofoed C, Espersen R, Johansson KE, Villa M, Willemoës M, Lindorff-Larsen K, Teilum K, Winther JR. A Soluble, Folded Protein without Charged Amino Acid Residues. Biochemistry 2016; 55:3949-56. [PMID: 27307139 DOI: 10.1021/acs.biochem.6b00269] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Charges are considered an integral part of protein structure and function, enhancing solubility and providing specificity in molecular interactions. We wished to investigate whether charged amino acids are indeed required for protein biogenesis and whether a protein completely free of titratable side chains can maintain solubility, stability, and function. As a model, we used a cellulose-binding domain from Cellulomonas fimi, which, among proteins of more than 100 amino acids, presently is the least charged in the Protein Data Bank, with a total of only four titratable residues. We find that the protein shows a surprising resilience toward extremes of pH, demonstrating stability and function (cellulose binding) in the pH range from 2 to 11. To ask whether the four charged residues present were required for these properties of this protein, we altered them to nontitratable ones. Remarkably, this chargeless protein is produced reasonably well in Escherichia coli, retains its stable three-dimensional structure, and is still capable of strong cellulose binding. To further deprive this protein of charges, we removed the N-terminal charge by acetylation and studied the protein at pH 2, where the C-terminus is effectively protonated. Under these conditions, the protein retains its function and proved to be both soluble and have a reversible folding-unfolding transition. To the best of our knowledge, this is the first time a soluble, functional protein with no titratable side chains has been produced.
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Affiliation(s)
- Casper Højgaard
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Christian Kofoed
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Roall Espersen
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Kristoffer Enøe Johansson
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Mara Villa
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Martin Willemoës
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Kresten Lindorff-Larsen
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Kaare Teilum
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
| | - Jakob R Winther
- Linderstrøm-Lang Centre for Protein Science, Department of Biology, University of Copenhagen , DK-2200 Copenhagen N, Denmark
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29
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González MC, Romero JM, Ingaramo MC, Muñoz Sosa CJ, Curtino JA, Carrizo ME. Enhancement by GOSPEL protein of GAPDH aggregation induced by nitric oxide donor and its inhibition by NAD(.). FEBS Lett 2016; 590:2210-20. [PMID: 27282776 DOI: 10.1002/1873-3468.12242] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 05/31/2016] [Accepted: 06/06/2016] [Indexed: 11/12/2022]
Abstract
Glyceraldehyde-3-phosphate dehydrogenase's (GAPDH's) competitor of Siah Protein Enhances Life (GOSPEL) is the protein that competes with Siah1 for binding to GAPDH under NO-induced stress conditions preventing Siah1-bound GAPDH nuclear translocation and subsequent apoptosis. Under these conditions, GAPDH may also form amyloid-like aggregates proposed to be involved in cell death. Here, we report the in vitro enhancement by GOSPEL of NO-induced GAPDH aggregation resulting in the formation GOSPEL-GAPDH co-aggregates with some amyloid-like properties. Our findings suggest a new function for GOSPEL, contrasting with its helpful role against the apoptotic nuclear translocation of GAPDH. NAD(+) inhibited both GAPDH aggregation and co-aggregation with GOSPEL, a hitherto undescribed effect of the coenzyme against the consequences of oxidative stress.
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Affiliation(s)
- María C González
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
| | - Jorge M Romero
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
| | - María C Ingaramo
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
| | - Christian J Muñoz Sosa
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
| | - Juan A Curtino
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
| | - María E Carrizo
- Departamento de Química Biológica, Facultad de Ciencias Químicas, Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Universidad Nacional de Córdoba-Consejo Nacional de Investigaciones Científicas y Técnicas (UNC-CONICET), Universidad Nacional de Córdoba, Argentina
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30
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Chaturvedi SK, Khan JM, Siddiqi MK, Alam P, Khan RH. Comparative insight into surfactants mediated amyloidogenesis of lysozyme. Int J Biol Macromol 2016; 83:315-25. [DOI: 10.1016/j.ijbiomac.2015.11.053] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 11/18/2015] [Accepted: 11/19/2015] [Indexed: 12/14/2022]
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31
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Mohammadi F, Mahmudian A, Moeeni M, Hassani L. Inhibition of amyloid fibrillation of hen egg-white lysozyme by the natural and synthetic curcuminoids. RSC Adv 2016. [DOI: 10.1039/c5ra18992f] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
As one of the strategies for synthesis of novel amyloid inhibitors, chemical modification of the natural curcuminoids framework can be introduced.
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Affiliation(s)
- Fakhrossadat Mohammadi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Afshin Mahmudian
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Marzieh Moeeni
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
| | - Leila Hassani
- Department of Biological Sciences
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-66731
- Iran
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32
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Wu FG, Jiang YW, Sun HY, Luo JJ, Yu ZW. Complexation of Lysozyme with Sodium Poly(styrenesulfonate) via the Two-State and Non-Two-State Unfoldings of Lysozyme. J Phys Chem B 2015; 119:14382-92. [DOI: 10.1021/acs.jpcb.5b07277] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fu-Gen Wu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Yao-Wen Jiang
- State
Key Laboratory of Bioelectronics, School of Biological Science and
Medical Engineering, Southeast University, Nanjing 210096, People’s Republic of China
| | - Hai-Yuan Sun
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Jun-Jie Luo
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Zhi-Wu Yu
- Key
Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology
(Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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33
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Morshedi D, Aliakbari F, Tayaranian-Marvian A, Fassihi A, Pan-Montojo F, Pérez-Sánchez H. Cuminaldehyde as the Major Component of Cuminum cyminum, a Natural Aldehyde with Inhibitory Effect on Alpha-Synuclein Fibrillation and Cytotoxicity. J Food Sci 2015; 80:H2336-45. [PMID: 26351865 DOI: 10.1111/1750-3841.13016] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 08/04/2015] [Indexed: 02/02/2023]
Abstract
Fibrillation of alpha-synuclein (α-SN) is a critical process in the pathophysiology of several neurodegenerative diseases, especially Parkinson's disease. Application of bioactive inhibitory compounds from herbal extracts is a potential therapeutic approach for this cytotoxic process. Here, we investigated the inhibitory effects of the Iranian Cuminum cyminum essential oil on the fibrillation of α-SN. Analysis of different fractions from the total extract identified cuminaldehyde as the active compound involved in the antifibrillation activity. In comparison with baicalein, a well-known inhibitor of α-SN fibrillation, cuminaldehyde showed the same activity in some aspects and a different activity on other parameters influencing α-SN fibrillation. The presence of spermidine, an α-SN fibrillation inducer, dominantly enforced the inhibitory effects of cuminaldehyde even more intensively than baicalein. Furthermore, the results from experiments using preformed fibrils and monobromobimane-labeled monomeric protein also suggest that cuminaldehyde prevents α-SN fibrillation even in the presence of seeds, having no disaggregating impact on the preformed fibrils. Structural studies showed that cuminaldehyde stalls protein assembly into β-structural fibrils, which might be achieved by the interaction with amine groups through its aldehyde group as a Schiff base reaction. This assumption was supported by FITC labeling efficiency assay. In addition, cytotoxicity assays on PC12 cells showed that cuminaldehyde is a nontoxic compound, treatment with cuminaldehyde throughout α-SN fibrillation showed no toxic effects on the cells. Taken together, these results show for the first time that the small abundant natural compound, cuminaldehyde, can modulate α-SN fibrillation. Hence, suggesting that such natural active aldehyde could have potential therapeutic applications.
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Affiliation(s)
- Dina Morshedi
- Dept. of Industrial and Environmental Biotechnology, National Inst. of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Farhang Aliakbari
- Dept. of Industrial and Environmental Biotechnology, National Inst. of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Amir Tayaranian-Marvian
- Dept. of Industrial and Environmental Biotechnology, National Inst. of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Afshin Fassihi
- Bioinformatics and High Performance Computing Research Group, Univ. Católica San Antonio de Murcia (UCAM), Spain
| | - Francisco Pan-Montojo
- Neurologische Klinik und Poliklinik., Klinikum der Univ. München, Munich, Germany.,Munich Cluster for Systems Neurology, SyNergy Clinician Scientist Group, Germany
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group, Univ. Católica San Antonio de Murcia (UCAM), Spain
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34
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Yousefi R, Taheri B, Alavi P, Shahsavani MB, Asadi Z, Ghahramani M, Niazi A, Alavianmehr MM, Moosavi-Movahedi AA. Aspirin-mediated acetylation induces structural alteration and aggregation of bovine pancreatic insulin. J Biomol Struct Dyn 2015; 34:362-75. [DOI: 10.1080/07391102.2015.1039584] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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35
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Evidence of two oxidation states of copper during aggregation of hen egg white lysozyme (HEWL). Int J Biol Macromol 2015; 76:1-9. [DOI: 10.1016/j.ijbiomac.2015.02.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 02/13/2015] [Accepted: 02/13/2015] [Indexed: 11/18/2022]
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36
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Employing in vitro analysis to test the potency of methylglyoxal in inducing the formation of amyloid-like aggregates of caprine brain cystatin. Amino Acids 2014; 47:135-46. [DOI: 10.1007/s00726-014-1848-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 09/29/2014] [Indexed: 10/24/2022]
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Bhat SA, Bano B. Conformational behaviour and aggregation of chickpea cystatin in trifluoroethanol: effects of epicatechin and tannic acid. Arch Biochem Biophys 2014; 562:51-61. [PMID: 25173679 DOI: 10.1016/j.abb.2014.08.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/12/2014] [Accepted: 08/20/2014] [Indexed: 11/29/2022]
Abstract
Conformational alterations and aggregates of chickpea cystatin (CPC) were investigated upon sequential addition of trifluoroethanol (TFE) over a range of 0-70% v/v. CPC on 30% and 40% v/v TFE addition exhibited non-native β-sheet, altered intrinsic fluorescence, increased thioflavin T fluorescence, prominent red shifted shoulder peak in Congo red absorbance, and enhanced turbidity as well as Rayleigh scattering, suggesting the aggregate formation. TEM results confirmed the formation of fibrillar aggregates at 30% and 40% v/v TFE. On increasing concentration of TFE to 70% v/v, CPC showed retention of native-like secondary structure, increased intrinsic and ANS fluorescence. Thus our results show that favourable condition for fibrillation of CPC is in the range of 30-40% TFE. Moreover, anti-aggregational effects of polyphenols, epicatechin (EC) and tannic acid (TA) were analysed using ThT binding assay and other biophysical assays. EC and TA produced a concentration dependent decline in ThT fluorescence suggesting inhibition of the fibril formation. Furthermore, TA in comparison to EC, served as a more effective inhibitor against amyloid fibril formation of CPC. This work supports the universality of the amyloid-like aggregation not restricted to some special categories of protein and the fact that this aggregation can be prevented.
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Affiliation(s)
- Sheraz Ahmad Bhat
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India
| | - Bilqees Bano
- Department of Biochemistry, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India.
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Ghosh S, Pandey NK, Banerjee P, Chaudhury K, Nagy NV, Dasgupta S. Copper(II) directs formation of toxic amorphous aggregates resulting in inhibition of hen egg white lysozyme fibrillation under alkaline salt-mediated conditions. J Biomol Struct Dyn 2014; 33:991-1007. [PMID: 24806136 DOI: 10.1080/07391102.2014.921864] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Hen egg white lysozyme (HEWL) adopts a molten globule-like state at high pH (~12.75) and is found to form amyloid fibrils at alkaline pH. Here, we report that Cu(II) inhibits self-association of HEWL at pH 12.75 both at 37 and 65 °C. A significant reduction in Thioflavin T fluorescence intensity, attenuation in β-sheet content and reduction in hydrophobic exposure were observed with increasing Cu(II) stoichiometry. Electron paramagnetic resonance spectroscopy suggests a 4N type of coordination pattern around Cu(II) during fibrillation. Cu(II) is also capable of altering the cytotoxicity of the proteinaceous aggregates. Fibrillar species of diverse morphology were found in the absence of Cu(II) with the generation of amorphous aggregates in the presence of Cu(II), which are more toxic compared to the fibrils alone.
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Affiliation(s)
- Sudeshna Ghosh
- a Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , India
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Khan JM, Chaturvedi SK, Rahman SK, Ishtikhar M, Qadeer A, Ahmad E, Khan RH. Protonation favors aggregation of lysozyme with SDS. SOFT MATTER 2014; 10:2591-2599. [PMID: 24647567 DOI: 10.1039/c3sm52435c] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Different proteins have different amino acid sequences as well as conformations, and therefore different propensities to aggregate. Electrostatic interactions have an important role in the aggregation of proteins as revealed by our previous report (J. M. Khan et al., PLoS One, 2012, 7, e29694). In this study, we designed and executed experiments to gain knowledge of the role of charge variations on proteins during the events of protein aggregation with lysozyme as a model protein. To impart positive and negative charges to proteins, we incubated lysozyme at different pH values of below and above the pI (∼11). Negatively charged SDS was used to 'antagonize' positive charges on lysozyme. We examined the effects of pH variations on SDS-induced amyloid fibril formation by lysozyme using methods such as far-UV circular dichroism, Rayleigh scattering, turbidity measurements, dye binding assays and dynamic light scattering. We found that sub-micellar concentrations of SDS (0.1 to 0.6 mM) induced amyloid fibril formation by lysozyme in the pH range of 10.0-1.0 and maximum aggregation was observed at pH 1.0. The morphology of aggregates was fibrillar in structure, as visualized by transmission electron microscopy. Isothermal titration calorimetry studies demonstrated that fibril formation is exothermic. To the best of our current understanding of the mechanism of aggregation, this study demonstrates the crucial role of electrostatic interactions during amyloid fibril formation. The model proposed here will help in designing molecules that can prevent or reverse the amyloid fibril formation or the aggregation.
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Affiliation(s)
- Javed M Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh 202002, India.
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Induction of amyloidogenicity in wild type HEWL by a dialdehyde: Analysis involving multi dimensional approach. Int J Biol Macromol 2014; 64:36-44. [DOI: 10.1016/j.ijbiomac.2013.11.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/17/2013] [Accepted: 11/18/2013] [Indexed: 11/23/2022]
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Takai E, Uda K, Matsushita S, Shikiya Y, Yamada Y, Shiraki K, Zako T, Maeda M. Cysteine inhibits amyloid fibrillation of lysozyme and directs the formation of small worm-like aggregates through non-covalent interactions. Biotechnol Prog 2014; 30:470-8. [DOI: 10.1002/btpr.1866] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 12/30/2013] [Indexed: 12/27/2022]
Affiliation(s)
- Eisuke Takai
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Ken Uda
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Shuhei Matsushita
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Yui Shikiya
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Yoichi Yamada
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Kentaro Shiraki
- Faculty of Pure and Applied Sciences; University of Tsukuba; Tsukuba Ibaraki 305-8573 Japan
| | - Tamotsu Zako
- Bioengineering Laboratory; RIKEN, 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Mizuo Maeda
- Bioengineering Laboratory; RIKEN, 2-1 Hirosawa Wako Saitama 351-0198 Japan
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Azami-Movahed M, Shariatizi S, Sabbaghian M, Ghasemi A, Ebrahim-Habibi A, Nemat-Gorgani M. Heme binding site in apomyoglobin may be effectively targeted with small molecules to control aggregation. Int J Biochem Cell Biol 2013; 45:299-307. [DOI: 10.1016/j.biocel.2012.10.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Revised: 10/08/2012] [Accepted: 10/11/2012] [Indexed: 12/31/2022]
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43
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Ghosh S, Pandey NK, Bhattacharya S, Roy A, Dasgupta S. Fibrillation of hen egg white lysozyme triggers reduction of copper(II). Int J Biol Macromol 2012; 51:1-6. [DOI: 10.1016/j.ijbiomac.2012.04.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 04/12/2012] [Accepted: 04/25/2012] [Indexed: 10/28/2022]
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Abstract
Protein aggregation underlies the development of an increasing number of conformational human diseases of growing incidence, such as Alzheimer's and Parkinson's diseases. Furthermore, the accumulation of recombinant proteins as intracellular aggregates represents a critical obstacle for the biotechnological production of polypeptides. Also, ordered protein aggregates constitute novel and versatile nanobiomaterials. Consequently, there is an increasing interest in the development of methods able to forecast the aggregation properties of polypeptides in order to modulate their intrinsic solubility. In this context, we have developed AGGRESCAN, a simple and fast algorithm that predicts aggregation-prone segments in protein sequences, compares the aggregation properties of different proteins or protein sets and analyses the effect of mutations on protein aggregation propensities.
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Pryor E, Kotarek JA, Moss MA, Hestekin CN. Monitoring insulin aggregation via capillary electrophoresis. Int J Mol Sci 2011; 12:9369-88. [PMID: 22272138 PMCID: PMC3257135 DOI: 10.3390/ijms12129369] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 12/06/2011] [Accepted: 12/12/2011] [Indexed: 01/30/2023] Open
Abstract
Early stages of insulin aggregation, which involve the transient formation of oligomeric aggregates, are an important aspect in the progression of Type II diabetes and in the quality control of pharmaceutical insulin production. This study is the first to utilize capillary electrophoresis (CE) with ultraviolet (UV) detection to monitor insulin oligomer formation at pH 8.0 and physiological ionic strength. The lag time to formation of the first detected species in the aggregation process was evaluated by UV-CE and thioflavin T (ThT) binding for salt concentrations from 100 mM to 250 mM. UV-CE had a significantly shorter (5–8 h) lag time than ThT binding (15–19 h). In addition, the lag time to detection of the first aggregated species via UV-CE was unaffected by salt concentration, while a trend toward an increased lag time with increased salt concentration was observed with ThT binding. This result indicates that solution ionic strength impacts early stages of aggregation and β-sheet aggregate formation differently. To observe whether CE may be applied for the analysis of biological samples containing low insulin concentrations, the limit of detection using UV and laser induced fluorescence (LIF) detection modes was determined. The limit of detection using LIF-CE, 48.4 pM, was lower than the physiological insulin concentration, verifying the utility of this technique for monitoring biological samples. LIF-CE was subsequently used to analyze the time course for fluorescein isothiocyanate (FITC)-labeled insulin oligomer formation. This study is the first to report that the FITC label prevented incorporation of insulin into oligomers, cautioning against the use of this fluorescent label as a tag for following early stages of insulin aggregation.
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Affiliation(s)
- Elizabeth Pryor
- Ralph E. Martin Department of Chemical Engineering, 3202 Bell Engineering Center, University of Arkansas, Fayetteville, AR 72701, USA; E-Mail: (E.P.)
| | - Joseph A. Kotarek
- Department of Chemical Engineering, 2C02 Swearingen Engineering Center, University of South Carolina, Columbia, SC 29208, USA; E-Mail:
| | - Melissa A. Moss
- Department of Chemical Engineering, 2C02 Swearingen Engineering Center, University of South Carolina, Columbia, SC 29208, USA; E-Mail:
| | - Christa N. Hestekin
- Ralph E. Martin Department of Chemical Engineering, 3202 Bell Engineering Center, University of Arkansas, Fayetteville, AR 72701, USA; E-Mail: (E.P.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-479-575-3416; Fax: +1-479-575-7926
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Saluja A, Fesinmeyer RM, Hogan S, Brems DN, Gokarn YR. Diffusion and sedimentation interaction parameters for measuring the second virial coefficient and their utility as predictors of protein aggregation. Biophys J 2011; 99:2657-65. [PMID: 20959107 DOI: 10.1016/j.bpj.2010.08.020] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Revised: 08/05/2010] [Accepted: 08/10/2010] [Indexed: 12/28/2022] Open
Abstract
The concentration-dependence of the diffusion and sedimentation coefficients (k(D) and k(s), respectively) of a protein can be used to determine the second virial coefficient (B₂), a parameter valuable in predicting protein-protein interactions. Accurate measurement of B₂ under physiologically and pharmaceutically relevant conditions, however, requires independent measurement of k(D) and k(s) via orthogonal techniques. We demonstrate this by utilizing sedimentation velocity (SV) and dynamic light scattering (DLS) to analyze solutions of hen-egg white lysozyme (HEWL) and a monoclonal antibody (mAb1) in different salt solutions. The accuracy of the SV-DLS method was established by comparing measured and literature B₂ values for HEWL. In contrast to the assumptions necessary for determining k(D) and k(s) via SV alone, k(D) and ks were of comparable magnitudes, and solution conditions were noted for both HEWL and mAb1 under which 1), k(D) and k(s) assumed opposite signs; and 2), k(D) ≥k(s). Further, we demonstrate the utility of k(D) and k(s) as qualitative predictors of protein aggregation through agitation and accelerated stability studies. Aggregation of mAb1 correlated well with B₂, k(D), and k(s), thus establishing the potential for k(D) to serve as a high-throughput predictor of protein aggregation.
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Affiliation(s)
- Atul Saluja
- Process and Product Development, Amgen, Seattle, Washington
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Swaminathan R, Ravi VK, Kumar S, Kumar MVS, Chandra N. Lysozyme: a model protein for amyloid research. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2011; 84:63-111. [PMID: 21846563 DOI: 10.1016/b978-0-12-386483-3.00003-3] [Citation(s) in RCA: 187] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Ever since lysozyme was discovered by Fleming in 1922, this protein has emerged as a model for investigations on protein structure and function. Over the years, several high-resolution structures have yielded a wealth of structural data on this protein. Extensive studies on folding of lysozyme have shown how different regions of this protein dynamically interact with one another. Data is also available from numerous biotechnological studies wherein lysozyme has been employed as a model protein for recovering active recombinant protein from inclusion bodies using small molecules like l-arginine. A variety of conditions have been developed in vitro to induce fibrillation in hen lysozyme. They include (a) acidic pH at elevated temperature, (b) concentrated solutions of ethanol, (c) moderate concentrations of guanidinium hydrochloride at moderate temperature, and (d) alkaline pH at room temperature. This review aims to bring together similarities and differences in aggregation mechanisms, morphology of aggregates, and related issues that arise using the different conditions mentioned above to improve our understanding. The alkaline pH condition (pH 12.2), discovered and studied extensively in our lab, shall receive special attention. More than a decade ago, it was revealed that mutations in human lysozyme can cause accumulation of large quantities of amyloid in liver, kidney, and other regions of gastrointestinal tract. Understanding the mechanism of lysozyme aggregation will probably have therapeutic implications for the treatment of systemic nonneuropathic amyloidosis. Numerous studies have begun to focus attention on inhibition of lysozyme aggregation using antibody or small molecules. The enzymatic activity of lysozyme presents a convenient handle to quantify the native population of lysozyme in a sample where aggregation has been inhibited. The rich information available on lysozyme coupled with the multiple conditions that have been successful in inducing/inhibiting its aggregation in vitro makes lysozyme an ideal model protein to investigate amyloidogenesis.
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Affiliation(s)
- Rajaram Swaminathan
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
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48
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Jain N, Bhattacharya M, Mukhopadhyay S. Kinetics of Surfactant-induced Aggregation of Lysozyme Studied by Fluorescence Spectroscopy. J Fluoresc 2010; 21:615-25. [DOI: 10.1007/s10895-010-0749-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Accepted: 10/05/2010] [Indexed: 01/18/2023]
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