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Stehle J, Hülsmann M, Godt A, Drescher M, Azarkh M. Evaluation of Copper(II) Transfer between Amyloid-beta Peptides by Relaxation-Induced Dipolar Modulation Enhancement (RIDME). Chemphyschem 2024; 25:e202300928. [PMID: 38285014 DOI: 10.1002/cphc.202300928] [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: 12/11/2023] [Revised: 01/25/2024] [Accepted: 01/26/2024] [Indexed: 01/30/2024]
Abstract
In the brains of Alzheimer's disease patients, fibrillar aggregates containing amyloid-beta (Aβ) peptides are found, along with elevated concentrations of Cu(II) ions. The aggregation pathways of Aβ peptides can be modulated by Cu(II) ions and is determined by the formation and nature of the Cu(II)-Aβ complex. If spin-labeled, the Cu(II)-Aβ complex contains two dipolar coupled paramagnetic centers, the spin label and the Cu(II) ion. Measurement of the dipolar coupling between these paramagnetic centers by relaxation-induced dipolar modulation enhancement (RIDME) allows to monitor the complex formation and thus opens a way to follow the Cu(II) transfer between peptides if a mixture of wild-type and spin-labeled ones is used. We evaluate this approach for a specific Cu(II)-Aβ complex, the aggregation-inert Component II. The kinetics of the Cu(II) transfer can be resolved by performing RIDME in a time-dependent manner. A temporal resolution of seconds has been achieved, with the potential to reach milliseconds, using a rapid-freeze quench device to stop the Cu(II) transfer in solution after defined incubation times.
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Affiliation(s)
- Juliane Stehle
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstr. 10, 78457, Konstanz, Germany
| | - Miriam Hülsmann
- Faculty of Chemistry and Center for Molecular Materials (CM2), Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Adelheid Godt
- Faculty of Chemistry and Center for Molecular Materials (CM2), Bielefeld University, Universitätsstraße 25, 33615, Bielefeld, Germany
| | - Malte Drescher
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstr. 10, 78457, Konstanz, Germany
| | - Mykhailo Azarkh
- Department of Chemistry and Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstr. 10, 78457, Konstanz, Germany
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2
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Sunda AP, Sharma AK. Molecular Insights into Cu/Zn Metal Response to the Amyloid β-Peptide (1-42). ACS PHYSICAL CHEMISTRY AU 2024; 4:57-66. [PMID: 38283784 PMCID: PMC10811771 DOI: 10.1021/acsphyschemau.3c00041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 01/30/2024]
Abstract
Aβ1-40 peptide and Aβ1-42 peptide are the building units of beta-amyloid plaques present in Alzheimer's disease (AD)-affected brain. The binding affinity of various divalent metal ions such as Cu and Zn present in AD-affected brain with different amino acids available in Aβ-peptide became the focus to explore their role in soluble neurotoxic oligomer formation. Cu2+ metal ions are known to enhance the neurotoxicity of the Aβ1-42 peptide by catalyzing the formation of soluble neurotoxic oligomers. The competitive preference of both Cu2+ and Zn2+ simultaneously to interact with the Aβ-peptide is unknown. The divalent Cu and Zn ions were inserted in explicit aqueous Aβ1-42 peptide configurations to get insights into the binding competence of these metal ions with peptides using classical molecular dynamics (MD) simulations. The metal-ion interactions reveal that competitive binding preferences of various peptide sites become metal-ion-specific and differ significantly. For Cu2+, interactions are found to be more significant with respect to those of Asp-7, His-6, Glu-11, and His-14. Asp-1, Glu-3, Asp-7, His-6, Glu-11, and His-13 amino acid residues show higher affinity toward Zn2+ ions. MD simulations show notable variation in the solvent-accessible surface area in the hydrophobic region of the peptide. Infinitesimal mobility was obtained for Zn2+ compared to Cu2+ in an aqueous solution and Cu2+ diffusivity deviated significantly at different time scales, proving its labile features in aqueous Aβ1-42 peptides.
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Affiliation(s)
- Anurag Prakash Sunda
- Department
of Chemistry, J. C. Bose University of Science
and Technology, YMCA, Faridabad 121006, India
| | - Anuj Kumar Sharma
- Department
of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Ajmer 305817, India
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3
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Yi Y, Lim MH. Current understanding of metal-dependent amyloid-β aggregation and toxicity. RSC Chem Biol 2023; 4:121-131. [PMID: 36794021 PMCID: PMC9906324 DOI: 10.1039/d2cb00208f] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 11/22/2022] [Indexed: 11/23/2022] Open
Abstract
The discovery of effective therapeutics targeting amyloid-β (Aβ) aggregates for Alzheimer's disease (AD) has been very challenging, which suggests its complicated etiology associated with multiple pathogenic elements. In AD-affected brains, highly concentrated metals, such as copper and zinc, are found in senile plaques mainly composed of Aβ aggregates. These metal ions are coordinated to Aβ and affect its aggregation and toxicity profiles. In this review, we illustrate the current view on molecular insights into the assembly of Aβ peptides in the absence and presence of metal ions as well as the effect of metal ions on their toxicity.
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Affiliation(s)
- Yelim Yi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Mi Hee Lim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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4
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Aki K, Okamura E. Real-Time 1H NMR reveals position and sequence dependences of amino acid isomerization in amyloid beta fragments in situ. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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5
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Abstract
Amyloid-β (Aβ) peptides are involved in Alzheimer's disease (AD) development. The interactions of these peptides with copper and zinc ions also seem to be crucial for this pathology. Although Cu(II) and Zn(II) ions binding by Aβ peptides has been scrupulously investigated, surprisingly, this phenomenon has not been so thoroughly elucidated for N-truncated Aβ4-x-probably the most common version of this biomolecule. This negligence also applies to mixed Cu-Zn complexes. From the structural in silico analysis presented in this work, it appears that there are two possible mixed Cu-Zn(Aβ4-x) complexes with different stoichiometries and, consequently, distinct properties. The Cu-Zn(Aβ4-x) complex with 1:1:1 stoichiometry may have a neuroprotective superoxide dismutase-like activity. On the other hand, another mixed 2:1:2 Cu-Zn(Aβ4-x) complex is perhaps a seed for toxic oligomers. Hence, this work proposes a novel research direction for our better understanding of AD development.
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6
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Okamura E, Aki K. Real-time in-situ 1H NMR of reactions in peptide solution: preaggregation of amyloid-β fragments prior to fibril formation. PURE APPL CHEM 2020. [DOI: 10.1515/pac-2019-1201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Abstract
In-situ analytical methods are essential for the reliable observation of peptide reactions without perturbation of the system. In this work, a real-time in-situ NMR analysis was performed to gain insight into the initial stage of the aggregation of amyloid-beta (Aβ) 8–25 monomers, S8GY10EVHHQKLVFF20AEDVG25, in solution prior to the fibril formation. NMR chemical shift and intensity changes in combination with the CD spectra revealed no changes in Aβ secondary structure, but the presence of soluble, oligomeric intermediates followed by the appearance of insoluble and non-structured aggregates before β-fibril formation. Molecular views of intermediates and aggregation mechanisms were proposed in comparison with NMR spectral changes in wild-type Aβ 8–25 and its two mutants, A21G and E22G. The mutation of just one amino acid modified the aggregation properties of Aβ 8–25; it slowed or accelerated the fibril formation by controlling the progress of conversion from monomer to aggregate via a soluble, small oligomer.
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Affiliation(s)
- Emiko Okamura
- Faculty of Pharmaceutical Sciences , Himeji Dokkyo University , 7-2-1, Kamiohno , Himeji 670-8524, Japan
| | - Kenzo Aki
- Faculty of Pharmaceutical Sciences , Himeji Dokkyo University , 7-2-1, Kamiohno , Himeji 670-8524, Japan
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Ayala S, Genevaux P, Hureau C, Faller P. (Bio)chemical Strategies To Modulate Amyloid-β Self-Assembly. ACS Chem Neurosci 2019; 10:3366-3374. [PMID: 31265239 DOI: 10.1021/acschemneuro.9b00239] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Amyloid plaques are one of the two hallmarks of Alzheimer's disease (AD). They consist mainly of fibrils made of self-assembled amyloid-β (Aβ) peptides. Aβ is produced in healthy brains from proteolytic cleavage of the amyloid precursor protein. Aβ aggregates, in particular smaller, soluble aggregates, are toxic to cells. Hence, modulating the self-assembly of Aβ became a very active field of research, with the aim to reduce the amount of the toxic aggregates of Aβ or to block their toxic action. A great variety of molecules, chemical and biological, are able to modify the aggregation of Aβ. Here we give an overview of the different mechanistic ways to modulate Aβ aggregation and on which step in the self-assembly molecules can interfere. We discuss the aggregation modulators according to different important parameters, including the type of interaction (weak interaction, coordination or covalent bonds), the importance of kinetics and thermodynamics, the size of the modulating molecules, and binding specificity.
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Affiliation(s)
- Sara Ayala
- LCC, CNRS & University of Toulouse (UPS, INPT), 205 route de Narbonne, 31077 Toulouse, France
- Laboratoire de Microbiologie et de Génétique Moléculaires, Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Pierre Genevaux
- Laboratoire de Microbiologie et de Génétique Moléculaires, Centre de Biologie Intégrative (CBI), Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Christelle Hureau
- LCC, CNRS & University of Toulouse (UPS, INPT), 205 route de Narbonne, 31077 Toulouse, France
| | - Peter Faller
- LCC, CNRS & University of Toulouse (UPS, INPT), 205 route de Narbonne, 31077 Toulouse, France
- Institut de Chimie, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France
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8
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Stefaniak E, Bal W. Cu II Binding Properties of N-Truncated Aβ Peptides: In Search of Biological Function. Inorg Chem 2019; 58:13561-13577. [PMID: 31304745 DOI: 10.1021/acs.inorgchem.9b01399] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As life expectancy increases, the number of people affected by progressive and irreversible dementia, Alzheimer's Disease (AD), is predicted to grow. No drug designs seem to be working in humans, apparently because the origins of AD have not been identified. Invoking amyloid cascade, metal ions, and ROS production hypothesis of AD, herein we share our point of view on Cu(II) binding properties of Aβ4-x, the most prevalent N-truncated Aβ peptide, currently known as the main constituent of amyloid plaques. The capability of Aβ4-x to rapidly take over copper from previously tested Aβ1-x peptides and form highly stable complexes, redox unreactive and resistant to copper exchange reactions, prompted us to propose physiological roles for these peptides. We discuss the new findings on the reactivity of Cu(II)Aβ4-x with coexisting biomolecules in the context of synaptic cleft; we suggest that the role of Aβ4-x peptides is to quench Cu(II) toxicity in the brain and maintain neurotransmission.
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Affiliation(s)
- Ewelina Stefaniak
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences , Pawińskiego 5a , 02-106 Warsaw , Poland
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Valiente-Gabioud AA, Riedel D, Outeiro TF, Menacho-Márquez MA, Griesinger C, Fernández CO. Binding Modes of Phthalocyanines to Amyloid β Peptide and Their Effects on Amyloid Fibril Formation. Biophys J 2019. [PMID: 29539391 DOI: 10.1016/j.bpj.2018.01.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The inherent tendency of proteins to convert from their native states into amyloid aggregates is associated with a range of human disorders, including Alzheimer's and Parkinson's diseases. In that sense, the use of small molecules as probes for the structural and toxic mechanism related to amyloid aggregation has become an active area of research. Compared with other compounds, the structural and molecular basis behind the inhibitory interaction of phthalocyanine tetrasulfonate (PcTS) with proteins such as αS and tau has been well established, contributing to a better understanding of the amyloid aggregation process in these proteins. We present here the structural characterization of the binding of PcTS and its Cu(II) and Zn(II)-loaded forms to the amyloid β-peptide (Aβ) and the impact of these interactions on the peptide amyloid fibril assembly. Elucidation of the PcTS binding modes to Aβ40 revealed the involvement of specific aromatic and hydrophobic interactions in the formation of the Aβ40-PcTS complex, ascribed to a binding mode in which the planarity and hydrophobicity of the aromatic ring system in the phthalocyanine act as main structural determinants for the interaction. Our results demonstrated that formation of the Aβ40-PcTS complex does not interfere with the progression of the peptide toward the formation of amyloid fibrils. On the other hand, conjugation of Zn(II) but not Cu(II) at the center of the PcTS macrocyclic ring modified substantially the binding profile of this phthalocyanine to Aβ40 and became crucial to reverse the effects of metal-free PcTS on the fibril assembly of the peptide. Overall, our results provide a firm basis to understand the structural rules directing phthalocyanine-protein interactions and their implications on the amyloid fibril assembly of the target proteins; in particular, our results contradict the hypothesis that PcTS might have similar mechanisms of action in slowing the formation of a variety of pathological aggregates.
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Affiliation(s)
- Ariel A Valiente-Gabioud
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, Ocampo y Esmeralda, Rosario, Argentina
| | - Dietmar Riedel
- Facility for Transmission Electron Microscopy, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Tiago F Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration; Center for Nanoscale Microscopy and Molecular Physiology of the Brain, University Medical Center Göttingen, University of Göttingen, Göttingen, Germany; Max Planck Institute for Experimental Medicine, Göttingen, Germany
| | - Mauricio A Menacho-Márquez
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, Ocampo y Esmeralda, Rosario, Argentina
| | - Christian Griesinger
- Center for Nanoscale Microscopy and Molecular Physiology of the Brain, University Medical Center Göttingen, University of Göttingen, Göttingen, Germany; Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Claudio O Fernández
- Max Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC) and Instituto de Investigaciones para el Descubrimiento de Fármacos de Rosario (IIDEFAR, UNR-CONICET), Universidad Nacional de Rosario, Ocampo y Esmeralda, Rosario, Argentina; Department of NMR-Based Structural Biology, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.
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10
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Rana M, Sharma AK. Cu and Zn interactions with Aβ peptides: consequence of coordination on aggregation and formation of neurotoxic soluble Aβ oligomers. Metallomics 2019; 11:64-84. [DOI: 10.1039/c8mt00203g] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The coordination chemistry of transition metal ions (Fe, Cu, Zn) with the amyloid-β (Aβ) peptides has attracted a lot of attention in recent years due to its repercussions in Alzheimer's disease (AD).
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Affiliation(s)
- Monika Rana
- Department of Chemistry
- Central University of Rajasthan
- Ajmer 305817
- India
| | - Anuj Kumar Sharma
- Department of Chemistry
- Central University of Rajasthan
- Ajmer 305817
- India
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11
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Atrián-Blasco E, Gonzalez P, Santoro A, Alies B, Faller P, Hureau C. Cu and Zn coordination to amyloid peptides: From fascinating chemistry to debated pathological relevance. Coord Chem Rev 2018; 375:38-55. [PMID: 30262932 DOI: 10.1016/j.ccr.2018.04.007] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Several diseases share misfolding of different peptides and proteins as a key feature for their development. This is the case of important neurodegenerative diseases such as Alzheimer's and Parkinson's diseases and type II diabetes mellitus. Even more, metal ions such as copper and zinc might play an important role upon interaction with amyloidogenic peptides and proteins, which could impact their aggregation and toxicity abilities. In this review, the different coordination modes proposed for copper and zinc with amyloid-β, α-synuclein and IAPP will be reviewed as well as their impact on the aggregation, and ROS production in the case of copper. In addition, a special focus will be given to the mutations that affect metal binding and lead to familial cases of the diseases. Different modifications of the peptides that have been observed in vivo and could be relevant for the coordination of metal ions are also described.
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Affiliation(s)
- Elena Atrián-Blasco
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | - Paulina Gonzalez
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Alice Santoro
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Bruno Alies
- Université de Bordeaux, ChemBioPharm INSERM U1212 CNRS UMR 5320, Bordeaux, France
| | - Peter Faller
- Biometals and Biology Chemistry, Institut de Chimie (CNRS UMR7177), Université de Strasbourg, 4 rue B. Pascal, 67081 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), Strasbourg, France
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
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12
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Borghesani V, Alies B, Hureau C. Cu(II) binding to various forms of amyloid-β peptides. Are they friends or foes? Eur J Inorg Chem 2018; 2018:7-15. [PMID: 30186035 PMCID: PMC6120674 DOI: 10.1002/ejic.201700776] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Indexed: 01/25/2023]
Abstract
In the present micro-review, we describe the Cu(II) binding to several forms of amyloid-β peptides, the peptides involved in Alzheimer's disease. It has indeed been shown that in addition to the "full-length" peptide originating from the precursor protein after cleavage at position 1, several other shorter peptides do exist in large proportion and may be involved in the disease as well. Cu(II) binding to amyloid-β peptides is one of the key interactions that impact both the aggregating properties of the amyloid peptides and the Reactive Oxygen Species (ROS) production, two events linked to the etiology of the disease. Binding sites and affinity are described in correlation with Cu(II) induced ROS formation and Cu(II) altered aggregation, for amyloid peptides starting at position 1, 3, 4, 11 and for the corresponding pyroglutamate forms when they could be obtained (i.e. for peptides cleaved at positions 3 and 11). It appears that the current paradigm which points out a toxic role of the Cu(II) - amyloid-β interaction might well be shifted towards a possible protective role when the peptides considered are the N-terminally truncated ones.
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Affiliation(s)
- Valentina Borghesani
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
| | | | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099 31077 Toulouse Cedex 4, France
- University of Toulouse, UPS, INPT, 31077 Toulouse Cedex 4, France
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13
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Atrián-Blasco E, Conte-Daban A, Hureau C. Mutual interference of Cu and Zn ions in Alzheimer's disease: perspectives at the molecular level. Dalton Trans 2017; 46:12750-12759. [PMID: 28937157 PMCID: PMC5656098 DOI: 10.1039/c7dt01344b] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 06/22/2017] [Indexed: 12/26/2022]
Abstract
While metal ions such as copper and zinc are essential in biology, they are also linked to several amyloid-related diseases, including Alzheimer's disease (AD). Zinc and copper can indeed modify the aggregation pathways of the amyloid-β (Aβ) peptide, the key component encountered in AD. In addition, the redox active copper ions do produce Reactive Oxygen Species (ROS) when bound to the Aβ peptide. While Cu(i) or Cu(ii) or Zn(ii) coordination to the Aβ has been extensively studied in the last ten years, characterization of hetero-bimetallic Aβ complexes is still scarce. This is also true for the metal induced Aβ aggregation and ROS production, for which studies on the mutual influence of the copper and zinc ions are currently appearing. Last but not least, zinc can strongly interfere in therapeutic approaches relying on copper detoxification. This will be exemplified with a biological lead, namely metallothioneins, and with synthetic ligands.
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Affiliation(s)
- Elena Atrián-Blasco
- CNRS , LCC (Laboratoire de Chimie de Coordination) , 205 route de Narbonne , BP 44099 31077 Toulouse Cedex 4 , France .
- University of Toulouse , UPS , INPT , 31077 Toulouse Cedex 4 , France
| | - Amandine Conte-Daban
- CNRS , LCC (Laboratoire de Chimie de Coordination) , 205 route de Narbonne , BP 44099 31077 Toulouse Cedex 4 , France .
- University of Toulouse , UPS , INPT , 31077 Toulouse Cedex 4 , France
| | - Christelle Hureau
- CNRS , LCC (Laboratoire de Chimie de Coordination) , 205 route de Narbonne , BP 44099 31077 Toulouse Cedex 4 , France .
- University of Toulouse , UPS , INPT , 31077 Toulouse Cedex 4 , France
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14
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Dharmadana D, Reynolds NP, Conn CE, Valéry C. Molecular interactions of amyloid nanofibrils with biological aggregation modifiers: implications for cytotoxicity mechanisms and biomaterial design. Interface Focus 2017; 7:20160160. [PMID: 28630679 PMCID: PMC5474041 DOI: 10.1098/rsfs.2016.0160] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Amyloid nanofibrils are ubiquitous biological protein fibrous aggregates, with a wide range of either toxic or beneficial activities that are relevant to human disease and normal biology. Protein amyloid fibrillization occurs via nucleated polymerization, through non-covalent interactions. As such, protein nanofibril formation is based on a complex interplay between kinetic and thermodynamic factors. The process entails metastable oligomeric species and a highly thermodynamically favoured end state. The kinetics, and the reaction pathway itself, can be influenced by third party moieties, either molecules or surfaces. Specifically, in the biological context, different classes of biomolecules are known to act as catalysts, inhibitors or modifiers of the generic protein fibrillization process. The biological aggregation modifiers reviewed here include lipid membranes of varying composition, glycosaminoglycans and metal ions, with a final word on xenobiotic compounds. The corresponding molecular interactions are critically analysed and placed in the context of the mechanisms of cytotoxicity of the amyloids involved in diverse pathologies and the non-toxicity of functional amyloids (at least towards their biological host). Finally, the utilization of this knowledge towards the design of bio-inspired and biocompatible nanomaterials is explored.
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Affiliation(s)
- Durga Dharmadana
- School of Health and Biomedical Sciences, Discipline of Pharmaceutical Sciences, RMIT University, Bundoora, Melbourne, Victoria 3083, Australia
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3001, Australia
| | - Nicholas P. Reynolds
- ARC Training Centre for Biodevices, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
| | - Charlotte E. Conn
- School of Science, College of Science, Engineering and Health, RMIT University, Melbourne, Victoria 3001, Australia
| | - Céline Valéry
- School of Health and Biomedical Sciences, Discipline of Pharmaceutical Sciences, RMIT University, Bundoora, Melbourne, Victoria 3083, Australia
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15
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Istrate AN, Kozin SA, Zhokhov SS, Mantsyzov AB, Kechko OI, Pastore A, Makarov AA, Polshakov VI. Interplay of histidine residues of the Alzheimer's disease Aβ peptide governs its Zn-induced oligomerization. Sci Rep 2016; 6:21734. [PMID: 26898943 PMCID: PMC4761979 DOI: 10.1038/srep21734] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 01/29/2016] [Indexed: 12/18/2022] Open
Abstract
Conformational changes of Aβ peptide result in its transformation from native monomeric state to the toxic soluble dimers, oligomers and insoluble aggregates that are hallmarks of Alzheimer's disease (AD). Interactions of zinc ions with Aβ are mediated by the N-terminal Aβ(1-16) domain and appear to play a key role in AD progression. There is a range of results indicating that these interactions trigger the Aβ plaque formation. We have determined structure and functional characteristics of the metal binding domains derived from several Aβ variants and found that their zinc-induced oligomerization is governed by conformational changes in the minimal zinc binding site 6HDSGYEVHH14. The residue H6 and segment 11EVHH14, which are part of this site are crucial for formation of the two zinc-mediated interaction interfaces in Aβ. These structural determinants can be considered as promising targets for rational design of the AD-modifying drugs aimed at blocking pathological Aβ aggregation.
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Affiliation(s)
- Andrey N Istrate
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Sergey A Kozin
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Sergey S Zhokhov
- Faculty of Fundamental Medicine, M.V. Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Alexey B Mantsyzov
- Faculty of Fundamental Medicine, M.V. Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Olga I Kechko
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | | | - Alexander A Makarov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991, Moscow, Russia
| | - Vladimir I Polshakov
- Faculty of Fundamental Medicine, M.V. Lomonosov Moscow State University, 119991, Moscow, Russia
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16
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Noël S, Bustos Rodriguez S, Sayen S, Guillon E, Faller P, Hureau C. Use of a new water-soluble Zn sensor to determine Zn affinity for the amyloid-β peptide and relevant mutants. Metallomics 2015; 6:1220-2. [PMID: 24652294 DOI: 10.1039/c4mt00016a] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Evaluation of Zn affinity for the amyloid-β peptide involved in Alzheimer's disease and its modified counterparts is reported. This was made possible by the use of a new water-soluble chelator, the properties of which have also been described. Changes in the peptide sequence that impact Zn affinity are briefly discussed.
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Affiliation(s)
- Sabrina Noël
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
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17
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Faller P, Hureau C, La Penna G. Metal ions and intrinsically disordered proteins and peptides: from Cu/Zn amyloid-β to general principles. Acc Chem Res 2014; 47:2252-9. [PMID: 24871565 DOI: 10.1021/ar400293h] [Citation(s) in RCA: 190] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The interaction of d-block metal ions (Cu, Zn, Fe, etc.) with intrinsically disordered proteins (IDPs) has gained interest, partly due to their proposed roles in several diseases, mainly neurodegenerative. A prominent member of IDPs is the peptide amyloid-β (Aβ) that aggregates into metal-enriched amyloid plaques, a hallmark of Alzheimer's disease, in which Cu and Zn are bound to Aβ. IDPs are a class of proteins and peptides that lack a unique 3D structure when the protein is isolated. This disordered structure impacts their interaction with metal ions compared with structured metalloproteins. Metalloproteins either have a preorganized metal binding site or fold upon metal binding, resulting in defined 3D structure with a well-defined metal site. In contrast, for Aβ and likely most of the other IDPs, the affinity for Cu(I/II) and Zn(II) is weaker and the interaction is flexible with different coordination sites present. Coordination of Cu(I/II) with Aβ is very dynamic including fast Cu-exchange reactions (milliseconds or less) that are intrapeptidic between different sites as well as interpeptidic. This highly dynamic metal-IDP interaction has a strong impact on reactivity and potential biological role: (i) Due to the low affinity compared with classical metalloproteins, IDPs likely bind metals only at special places or under special conditions. For Aβ, this is likely in the neurons that expel Zn or Cu into the synapse and upon metal dysregulation occurring in Alzheimer's disease. (ii) Amino acid substitutions (mutations) on noncoordinating residues can change drastically the coordination sphere. (iii) Considering the Cu/Zn-Aβ aberrant interaction, therapeutic strategies can be based on removal of Cu/Zn or precluding their binding to the peptide. The latter is very difficult due to the multitude of metal-binding sites, but the fast koff facilitates removal. (iv) The high flexibility of the Cu-Aβ complex results in different conformations with different redox activity. Only some conformations are able to produce reactive oxygen species. (v) Other, more specific catalysis (like enzymes) is very unlikely for Cu/Zn-Aβ. (vi) The Cu/Zn exchange reactions with Aβ are faster than the aggregation process and can hence have a strong impact on this process. In conclusion, the coordination chemistry is fundamentally different for most of IDPs compared with the classical, structured metalloproteins or with (bio)-inorganic complexes. The dynamics is a key parameter to understand this interaction and its potential biological impact.
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Affiliation(s)
- Peter Faller
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, Toulouse F-31077 Cedex 4, France
- Université de Toulouse, UPS, INPT, Toulouse F-31077 Cedex 4, France
| | - Christelle Hureau
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, Toulouse F-31077 Cedex 4, France
- Université de Toulouse, UPS, INPT, Toulouse F-31077 Cedex 4, France
| | - Giovanni La Penna
- CNR - National Research Council of Italy, ICCOM
- Institute for chemistry of organo-metallic compounds, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Firenze, Italy
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18
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Hureau C, Faller P. Platinoid complexes to target monomeric disordered peptides: a forthcoming solution against amyloid diseases? Dalton Trans 2014; 43:4233-7. [DOI: 10.1039/c3dt52954a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Sharma AK, Pavlova ST, Kim J, Kim J, Mirica LM. The effect of Cu(2+) and Zn(2+) on the Aβ42 peptide aggregation and cellular toxicity. Metallomics 2013; 5:1529-36. [PMID: 23995980 PMCID: PMC4060528 DOI: 10.1039/c3mt00161j] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The coordination chemistry of Cu and Zn metal ions with the amyloid β (Aβ) peptides has attracted a lot of attention in recent years due to its implications in Alzheimer's disease. A number of reports indicate that Cu and Zn have profound effects on Aβ aggregation. However, the impact of these metal ions on Aβ oligomerization and fibrillization is still not well understood, especially for the more rapidly aggregating and more neurotoxic Aβ42 peptide. Here we report the effect of Cu(2+) and Zn(2+) on Aβ42 oligomerization and aggregation using a series of methods such as Thioflavin T (ThT) fluorescence, native gel and Western blotting, transmission electron microscopy (TEM), and cellular toxicity studies. Our studies suggest that both Cu(2+) and Zn(2+) ions inhibit Aβ42 fibrillization. While presence of Cu(2+) stabilizes Aβ42 oligomers, Zn(2+) leads to formation of amorphous, non-fibrillar aggregates. The effects of temperature, buffer, and metal ion concentration and stoichiometry were also studied. Interestingly, while Cu(2+) increases the Aβ42-induced cell toxicity, Zn(2+) causes a significant decrease in Aβ42 neurotoxicity. While previous reports have indicated that Cu(2+) can disrupt β-sheets and lead to non-fibrillar Aβ aggregates, the neurotoxic consequences were not investigated in detail. The data presented herein including cellular toxicity studies strongly suggest that Cu(2+) increases the neurotoxicity of Aβ42 due to stabilization of soluble Aβ42 oligomers.
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Affiliation(s)
- Anuj K Sharma
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
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20
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Alies B, Hureau C, Faller P. The role of metal ions in amyloid formation: general principles from model peptides. Metallomics 2013; 5:183-92. [DOI: 10.1039/c3mt20219d] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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21
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Alies B, LaPenna G, Sayen S, Guillon E, Hureau C, Faller P. Insights into the mechanisms of amyloid formation of Zn(II)-Ab11-28: pH-dependent zinc coordination and overall charge as key parameters for kinetics and the structure of Zn(II)-Ab11-28 aggregates. Inorg Chem 2012; 51:7897-902. [PMID: 22765389 DOI: 10.1021/ic300972j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Self-assembly of amyloidogenic peptides and their metal complexes are of multiple interest including their association with several neurological diseases. Therefore, a better understanding of the role of metal ions in the aggregation process is of broad interest. We report pH-dependent structural and aggregation studies on Zn(II) binding to the amyloidogenic peptide Ab11-28. The results suggest that coordination of the N-terminal amine to Zn(II) is responsible for the inhibition of amyloid formation and the overall charge for amorphous aggregates.
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Affiliation(s)
- Bruno Alies
- Laboratoire de Chimie de Coordination, CNRS, 205 route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France
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