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Kastal Z, Balabán A, Vida S, Kállay C, Nagy L, Várnagy K, Sóvágó I. Copper(II), Nickel(II) and Zinc(II) Complexes of Peptide Fragments of Tau Protein. Molecules 2024; 29:2171. [PMID: 38792033 PMCID: PMC11123990 DOI: 10.3390/molecules29102171] [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: 03/24/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/26/2024] Open
Abstract
Copper(II), nickel(II) and zinc(II) complexes of various peptide fragments of tau protein were studied by potentiometric and spectroscopic techniques. All peptides contained one histidyl residue and represented the sequences of tau(91-97) (Ac-AQPHTEI-NH2), tau(385-390) (Ac-KTDHGA-NH2) and tau(404-409) (Ac-SPRHLS-NH2). Imidazole-N donors of histidine were the primary metal binding sites for all peptides and all metal ions, but in the case of copper(II) and nickel(II), the deprotonated amide groups were also involved in metal binding by increasing pH. The most stable complexes were formed with copper(II) ions, but the presence of prolyl residues resulted in significant changes in the thermodynamic stability and speciation of the systems. It was also demonstrated that nickel(II) and especially zinc(II) complexes have relatively low thermodynamic stability with these peptides. The copper(II)-catalyzed oxidation of the peptides was also studied. In the presence of H2O2, the fragmentation of peptides was detected in all cases. In the simultaneous presence of H2O2 and ascorbic acid, the fragmentation of the peptide is less preferred, and the formation of 2-oxo-histidine also occurs.
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Affiliation(s)
- Zsuzsa Kastal
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
| | - Adrienn Balabán
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
| | - Szilvia Vida
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
| | - Csilla Kállay
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
| | - Lajos Nagy
- Department of Applied Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary;
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary; (Z.K.); (C.K.); (K.V.)
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Oliveri V. Unveiling the Effects of Copper Ions in the Aggregation of Amyloidogenic Proteins. Molecules 2023; 28:6446. [PMID: 37764220 PMCID: PMC10537474 DOI: 10.3390/molecules28186446] [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: 07/31/2023] [Revised: 08/30/2023] [Accepted: 09/03/2023] [Indexed: 09/29/2023] Open
Abstract
Amyloid diseases have become a global concern due to their increasing prevalence. Transition metals, including copper, can affect the aggregation of the pathological proteins involved in these diseases. Copper ions play vital roles in organisms, but the disruption of their homeostasis can negatively impact neuronal function and contribute to amyloid diseases with toxic protein aggregates, oxidative stress, mitochondrial dysfunction, impaired cellular signaling, inflammation, and cell death. Gaining insight into the imbalance of copper ions and its impact on protein folding and aggregation is crucial for developing focused therapies. This review examines the influence of copper ions on significant amyloid proteins/peptides, offering a comprehensive overview of the current understanding in this field.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università degli Studi di Catania, Viale A Doria 6, 95125 Catania, Italy
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3
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Suh JM, Kim M, Yoo J, Han J, Paulina C, Lim MH. Intercommunication between metal ions and amyloidogenic peptides or proteins in protein misfolding disorders. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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New TEMPO-Appended 2,2'-Bipyridine-Based Eu(III), Tb(III), Gd(III) and Sm(III) Complexes: Synthesis, Photophysical Studies and Testing Photoluminescence-Based Bioimaging Abilities. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238414. [PMID: 36500504 PMCID: PMC9739109 DOI: 10.3390/molecules27238414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 12/05/2022]
Abstract
Linked to Alzheimer's disease (AD), amyloids and tau-protein are known to contain a large number of cysteine (Cys) residues. In addition, certain levels of some common biogenic thiols (cysteine (Cys), homocysteine (Hcy), glutathione (GSH), etc.) in biological fluids are closely related to AD as well as other diseases. Therefore, probes with a selective interaction with the above-mentioned thiols can be used for the monitoring and visualizing changes of (bio)thiols in the biological fluids as well as in the brain of animal models of Alzheimer's disease. In this study, new Eu(III), Tb(III), Gd(III) and Sm(III) complexes of 2,2'-bipyridine ligands containing TEMPO fragments as receptor units for (bio)thiols are reported. The presence of free radical fragments of the ligand in the complexes was proved by using the electronic paramagnetic resonance (EPR) method. Among all the complexes, the Eu(III) complex turned out to be the most promising one as luminescence- and spin-probe for the detection of biogenic thiols. The EPR and fluorescent titration methods showed the interaction of the resulting complex with free Cys and GSH in solution. To study the practical applicability of the probes for the monitoring of AD in-vivo, by using the above-mentioned Eu(III)-based probe, the staining of the brain of mice with amyloidosis and Vero cell cultures supplemented with the cysteine-enriched medium was studied as well as the fluorescence titration of Bovine Serum Albumin, BSA (as the model for the thiol moieties containing protein), was carried out. Based on the results of fluorescence titration, the formation of a non-covalent inclusion complex between the above-mentioned Eu(III) complex and BSA was suggested.
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Bacchella C, Gentili S, Mozzi SI, Monzani E, Casella L, Tegoni M, Dell’Acqua S. Role of the Cysteine in R3 Tau Peptide in Copper Binding and Reactivity. Int J Mol Sci 2022; 23:ijms231810726. [PMID: 36142637 PMCID: PMC9503722 DOI: 10.3390/ijms231810726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/07/2022] [Accepted: 09/10/2022] [Indexed: 11/16/2022] Open
Abstract
Tau is a widespread neuroprotein that regulates the cytoskeleton assembly. In some neurological disorders, known as tauopathies, tau is dissociated from the microtubule and forms insoluble neurofibrillary tangles. Tau comprises four pseudorepeats (R1-R4), containing one (R1, R2, R4) or two (R3) histidines, that potentially act as metal binding sites. Moreover, Cys291 and Cys322 in R2 and R3, respectively, might have an important role in protein aggregation, through possible disulfide bond formation, and/or affecting the binding and reactivity of redox-active metal ions, as copper. We, therefore, compare the interaction of copper with octadeca-R3-peptide (R3C) and with the mutant containing an alanine residue (R3A) to assess the role of thiol group. Spectrophotometric titrations allow to calculate the formation constant of the copper(I) complexes, showing a remarkable stronger interaction in the case of R3C (l log Kf = 13.4 and 10.5 for copper(I)-R3C and copper(I)-R3A, respectively). We also evaluate the oxidative reactivity associated to these copper complexes in the presence of dopamine and ascorbate. Both R3A and R3C peptides increase the capability of copper to oxidize catechols, but copper-R3C displays a peculiar mechanism due to the presence of cysteine. HPLC-MS analysis shows that cysteine can form disulfide bonds and dopamine-Cys covalent adducts, with potential implication in tau aggregation process.
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Affiliation(s)
- Chiara Bacchella
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Silvia Gentili
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Sara Ida Mozzi
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Enrico Monzani
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Luigi Casella
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy
- Correspondence:
| | - Matteo Tegoni
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale, Università di Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Simone Dell’Acqua
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy
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Balogh BD, Szunyog G, Lukács M, Szakács B, Sóvágó I, Várnagy K. Thermodynamics and structural characterization of the nickel(II) and zinc(II) complexes of various peptide fragments of tau protein. Dalton Trans 2021; 50:14411-14420. [PMID: 34569575 DOI: 10.1039/d1dt02324a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nickel(II) and zinc(II) complexes of various peptide fragments of tau protein have been investigated by potentiometric, UV-Vis, CD and ESI-MS techniques. The peptides include the native fragment tau(9-16) (Ac-EVMEDHAG-NH2), and the Gln/Lys and Tyr/Ala mutated peptides (Ac-KGGYTMHK-NH2 and Ac-KGGATMHK-NH2) of tau(26-33). Similar to copper(II) the complexes of a chimeric peptide containing both His14 and His32 residues in one molecule (Ac-EDHAGTMHQD-NH2) were also studied. The metal binding ability of the R3 domain was studied by using the native fragment tau(326-333) (Ac-GNIHHKPG-NH2), and its two mutants (Ac-GNIHHKAG-NH2) and (Ac-GNGHHKPG-NH2) and the corresponding 1-histidine mutants (Ac-GNGAHKPG-NH2 and Ac-GNGHAKPG-NH2). The results of this study reveal that the histidyl residues of the N-terminal and R3 regions of tau protein can effectively bind nickel(II) and zinc(II) ions. In the case of nickel(II) and zinc(II) the M-Nim coordinated complexes are the major species in the physiological pH range and their stability is significantly enhanced by the presence of Glu and Asp residues in the neighbourhood of the His14 site. For all studied peptides, nickel(II) ions are able to promote the deprotonation and coordination of amide groups preceding histidine resulting in the exclusive formation of square planar (Nim,3N-) complexes in alkaline solutions. The native fragment of the R3 region and its mutants containing two adjacent histidine moieties also bind only one nickel(II) ion with the His330 residue being the primary metal binding site. Exclusive binding of the independent imidazole side chains (His14 and His32 sites) cannot prevent the hydrolysis of zinc(II) in a slightly basic solution but the adjacent histidines of the R3 domain can promote the formation of amide coordinated zinc(II) complexes.
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Affiliation(s)
- Bettina Diána Balogh
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
| | - Györgyi Szunyog
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
| | - Márton Lukács
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
| | - Bence Szakács
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4032, Debrecen, Hungary.
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Golec C, Esteves-Villanueva JO, Martic S. Electrochemical characterization of Cu(II) complexes of brain-related tau peptides. CAN J CHEM 2021. [DOI: 10.1139/cjc-2020-0288] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Metal ion dyshomeostasis plays an important role in diseases, including neurodegeneration. Tau protein is a known neurodegeneration biomarker, but its interactions with biologically relevant metal ions, such as Cu(II), are not fully understood. Herein, the Cu(II) complexes of four tau R peptides, based on the tau repeat domains, R1, R2, R3, and R4, were characterized by electrochemical methods, including cyclic voltammetry, square-wave voltammetry, and differential pulse voltammetry in solution under aerobic conditions. The current and potential associated with Cu(II)/(I) redox couple was modulated as a function of R peptide sequence and concentration. All R peptides coordinated Cu(II) resulting in a dramatic decrease in the current associated with free Cu(II), and the appearance of a new redox couple due to metallo–peptide complex. The metallo–peptide complexes were characterized by the irreversible redox couple at more positive potentials and slower electron-transfer rates compared with the free Cu(II). The competition binding studies between R peptides with Cu(II) indicated that the strongest binding affinity was observed for the R3 peptide, which contained 2 His and 1 Cys residues. The formation of complexes was also evaluated as a function of peptide concentration and in the presence of competing Zn(II) ions. Data indicate that all metallo–peptides remain redox active pointing to the potential importance of the interactions between tau protein with metal ions in a biological setting.
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Affiliation(s)
- Camilla Golec
- Department of Forensic Science and Environmental Life Sciences Program, Trent University, 1600 West Bank Road, Peterborough, ON K9L 0G2, Canada
| | | | - Sanela Martic
- Department of Forensic Science and Environmental Life Sciences Program, Trent University, 1600 West Bank Road, Peterborough, ON K9L 0G2, Canada
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8
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Maina MB, Al-Hilaly YK, Burra G, Rickard JE, Harrington CR, Wischik CM, Serpell LC. Oxidative Stress Conditions Result in Trapping of PHF-Core Tau (297-391) Intermediates. Cells 2021; 10:cells10030703. [PMID: 33809978 PMCID: PMC8005035 DOI: 10.3390/cells10030703] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 01/23/2023] Open
Abstract
The self-assembly of tau into paired helical filaments (PHFs) in neurofibrillary tangles (NFTs) is a significant event in Alzheimer's disease (AD) pathogenesis. Numerous post-translational modifications enhance or inhibit tau assembly into NFTs. Oxidative stress, which accompanies AD, induces multiple post-translational modifications in proteins, including the formation of dityrosine (DiY) cross-links. Previous studies have revealed that metal-catalysed oxidation (MCO) using Cu2+ and H2O2 leads to the formation of DiY cross-links in two misfolding proteins, Aβ and α-synuclein, associated with AD and Parkinson's disease respectively. The effect of MCO on tau remains unknown. Here, we examined the effect of MCO and ultra-violet oxidation to study the influence of DiY cross-linking on the self-assembly of the PHF-core tau fragment. We report that DiY cross-linking facilitates tau assembly into tau oligomers that fail to bind thioflavin S, lack β-sheet structure and prevents their elongation into filaments. At a higher concentration, Cu2+ (without H2O2) also facilitates the formation of these tau oligomers. The DiY cross-linked tau oligomers do not cause cell death. Our findings suggest that DiY cross-linking of pre-assembled tau promotes the formation of soluble tau oligomers that show no acute impact on cell viability.
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Affiliation(s)
- Mahmoud B. Maina
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK; (M.B.M.); (Y.K.A.-H.); (G.B.)
- College of Medical Sciences, Yobe State University, Damaturu P.M.B. 1144, Nigeria
| | - Youssra K. Al-Hilaly
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK; (M.B.M.); (Y.K.A.-H.); (G.B.)
- Chemistry Department, College of Sciences, Mustansiriyah University, Baghdad, Iraq
| | - Gunasekhar Burra
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK; (M.B.M.); (Y.K.A.-H.); (G.B.)
- Analytical Research and Development, Pharma Division, Biological E. Limited, Genome Valley, IKP-Shameerpet, Hyderabad 500 078, Telangana, India
| | - Janet E. Rickard
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZP, UK; (J.E.R.); (C.R.H.); (C.M.W.)
| | - Charles R. Harrington
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZP, UK; (J.E.R.); (C.R.H.); (C.M.W.)
- TauRx Therapeutics Ltd., Aberdeen AB24 5RP, UK
| | - Claude M. Wischik
- Institute of Medical Sciences, University of Aberdeen, Aberdeen AB25 2ZP, UK; (J.E.R.); (C.R.H.); (C.M.W.)
- TauRx Therapeutics Ltd., Aberdeen AB24 5RP, UK
| | - Louise C. Serpell
- Sussex Neuroscience, School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK; (M.B.M.); (Y.K.A.-H.); (G.B.)
- Correspondence:
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9
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Nguyen PH, Ramamoorthy A, Sahoo BR, Zheng J, Faller P, Straub JE, Dominguez L, Shea JE, Dokholyan NV, De Simone A, Ma B, Nussinov R, Najafi S, Ngo ST, Loquet A, Chiricotto M, Ganguly P, McCarty J, Li MS, Hall C, Wang Y, Miller Y, Melchionna S, Habenstein B, Timr S, Chen J, Hnath B, Strodel B, Kayed R, Lesné S, Wei G, Sterpone F, Doig AJ, Derreumaux P. Amyloid Oligomers: A Joint Experimental/Computational Perspective on Alzheimer's Disease, Parkinson's Disease, Type II Diabetes, and Amyotrophic Lateral Sclerosis. Chem Rev 2021; 121:2545-2647. [PMID: 33543942 PMCID: PMC8836097 DOI: 10.1021/acs.chemrev.0c01122] [Citation(s) in RCA: 378] [Impact Index Per Article: 126.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Protein misfolding and aggregation is observed in many amyloidogenic diseases affecting either the central nervous system or a variety of peripheral tissues. Structural and dynamic characterization of all species along the pathways from monomers to fibrils is challenging by experimental and computational means because they involve intrinsically disordered proteins in most diseases. Yet understanding how amyloid species become toxic is the challenge in developing a treatment for these diseases. Here we review what computer, in vitro, in vivo, and pharmacological experiments tell us about the accumulation and deposition of the oligomers of the (Aβ, tau), α-synuclein, IAPP, and superoxide dismutase 1 proteins, which have been the mainstream concept underlying Alzheimer's disease (AD), Parkinson's disease (PD), type II diabetes (T2D), and amyotrophic lateral sclerosis (ALS) research, respectively, for many years.
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Affiliation(s)
- Phuong H Nguyen
- CNRS, UPR9080, Université de Paris, Laboratory of Theoretical Biochemistry, IBPC, Fondation Edmond de Rothschild, PSL Research University, Paris 75005, France
| | - Ayyalusamy Ramamoorthy
- Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Bikash R Sahoo
- Biophysics and Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Jie Zheng
- Department of Chemical & Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Peter Faller
- Institut de Chimie, UMR 7177, CNRS-Université de Strasbourg, 4 rue Blaise Pascal, 67000 Strasbourg, France
| | - John E Straub
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Laura Dominguez
- Facultad de Química, Departamento de Fisicoquímica, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico
| | - Joan-Emma Shea
- Department of Chemistry and Biochemistry, and Department of Physics, University of California, Santa Barbara, California 93106, United States
| | - Nikolay V Dokholyan
- Department of Pharmacology and Biochemistry & Molecular Biology, Penn State University College of Medicine, Hershey, Pennsylvania 17033, United States
- Department of Chemistry, and Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Alfonso De Simone
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
- Molecular Biology, University of Naples Federico II, Naples 80138, Italy
| | - Buyong Ma
- Basic Science Program, Leidos Biomedical Research, Inc., Cancer and Inflammation Program, National Cancer Institute, Frederick, Maryland 21702, United States
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Ruth Nussinov
- Basic Science Program, Leidos Biomedical Research, Inc., Cancer and Inflammation Program, National Cancer Institute, Frederick, Maryland 21702, United States
- Sackler Institute of Molecular Medicine, Department of Human Genetics and Molecular Medicine Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Saeed Najafi
- Department of Chemistry and Biochemistry, and Department of Physics, University of California, Santa Barbara, California 93106, United States
| | - Son Tung Ngo
- Laboratory of Theoretical and Computational Biophysics & Faculty of Applied Sciences, Ton Duc Thang University, 33000 Ho Chi Minh City, Vietnam
| | - Antoine Loquet
- Institute of Chemistry & Biology of Membranes & Nanoobjects, (UMR5248 CBMN), CNRS, Université Bordeaux, Institut Européen de Chimie et Biologie, 33600 Pessac, France
| | - Mara Chiricotto
- Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K
| | - Pritam Ganguly
- Department of Chemistry and Biochemistry, and Department of Physics, University of California, Santa Barbara, California 93106, United States
| | - James McCarty
- Chemistry Department, Western Washington University, Bellingham, Washington 98225, United States
| | - Mai Suan Li
- Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City 700000, Vietnam
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
| | - Carol Hall
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Yiming Wang
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Yifat Miller
- Department of Chemistry and The Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Be'er Sheva 84105, Israel
| | | | - Birgit Habenstein
- Institute of Chemistry & Biology of Membranes & Nanoobjects, (UMR5248 CBMN), CNRS, Université Bordeaux, Institut Européen de Chimie et Biologie, 33600 Pessac, France
| | - Stepan Timr
- CNRS, UPR9080, Université de Paris, Laboratory of Theoretical Biochemistry, IBPC, Fondation Edmond de Rothschild, PSL Research University, Paris 75005, France
| | - Jiaxing Chen
- Department of Pharmacology and Biochemistry & Molecular Biology, Penn State University College of Medicine, Hershey, Pennsylvania 17033, United States
| | - Brianna Hnath
- Department of Pharmacology and Biochemistry & Molecular Biology, Penn State University College of Medicine, Hershey, Pennsylvania 17033, United States
| | - Birgit Strodel
- Institute of Complex Systems: Structural Biochemistry (ICS-6), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Rakez Kayed
- Mitchell Center for Neurodegenerative Diseases, and Departments of Neurology, Neuroscience and Cell Biology, University of Texas Medical Branch, Galveston, Texas 77555, United States
| | - Sylvain Lesné
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Guanghong Wei
- Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai 200438, China
| | - Fabio Sterpone
- CNRS, UPR9080, Université de Paris, Laboratory of Theoretical Biochemistry, IBPC, Fondation Edmond de Rothschild, PSL Research University, Paris 75005, France
| | - Andrew J Doig
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, U.K
| | - Philippe Derreumaux
- CNRS, UPR9080, Université de Paris, Laboratory of Theoretical Biochemistry, IBPC, Fondation Edmond de Rothschild, PSL Research University, Paris 75005, France
- Laboratory of Theoretical Chemistry, Ton Duc Thang University, 33000 Ho Chi Minh City, Vietnam
- Faculty of Pharmacy, Ton Duc Thang University, 33000 Ho Chi Minh City, Vietnam
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10
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Balogh BD, Szakács B, Di Natale G, Tabbì G, Pappalardo G, Sóvágó I, Várnagy K. Copper (II) binding properties of an octapeptide fragment from the R3 region of tau protein: A combined potentiometric, spectroscopic and mass spectrometric study. J Inorg Biochem 2021; 217:111358. [PMID: 33588277 DOI: 10.1016/j.jinorgbio.2021.111358] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 01/10/2021] [Accepted: 01/16/2021] [Indexed: 12/25/2022]
Abstract
The copper(II) complexes of a peptide fragment of the R3 domain of tau protein (tau(326-333) Ac-GNIHHKPG-NH2) and its mutants (Ac-GNGHHKPG-NH2, Ac-GNIHHKAG-NH2, Ac-GNGAHKPG-NH2 and Ac-GNGHAKPG-NH2) have been studied by potentiometric and spectroscopic (UV-Vis, CD) methods. ESR spectroscopy and mass spectrometry were also used to prove the coordination mode of the mononuclear complexes and the formation of dinuclear species, respectively. It has been demonstrated that the (326-333) fragment of tau protein is a versatile and effective ligand for copper(II) coordination. The versatility of copper(II) binding is related to the presence of two adjacent histidyl residues in the sequence, which results in the coexistence of mononuclear, bis(ligand) and dinuclear complexes at different metal to ligand ratios. The 1:1 mononuclear complexes are, however, the dominant species with all peptides and the imidazole-N and one to three deprotonated amide nitrogen atoms towards the N-terminal side of the histidyl residue have been suggested as metal binding sites. This binding mode allows the formation of coordination isomers because any of the two histidine moieties can be the primary anchoring site. It is evident from the CD spectroscopic measurements that the isomers are present in almost equal concentration. The copper(II) binding affinity of the native fragment of tau protein is comparable to that of a similar 2-histidine fragment of amyloid-β mutant, Ac-SGAEGHHQK-NH2 but the comparison with an independent histidyl residue (H32) from the N-terminal region of the protein reveals the predominance of H32 over the histidines in the R3 domain.
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Affiliation(s)
- Bettina Diána Balogh
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Bence Szakács
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Giuseppe Di Natale
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18, I-95126 Catania, Italy
| | - Giovanni Tabbì
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18, I-95126 Catania, Italy
| | - Giuseppe Pappalardo
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18, I-95126 Catania, Italy
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary.
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11
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Zubčić K, Hof PR, Šimić G, Jazvinšćak Jembrek M. The Role of Copper in Tau-Related Pathology in Alzheimer's Disease. Front Mol Neurosci 2020; 13:572308. [PMID: 33071757 PMCID: PMC7533614 DOI: 10.3389/fnmol.2020.572308] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 08/19/2020] [Indexed: 12/12/2022] Open
Abstract
All tauopathies, including Alzheimer's disease (AD), are characterized by the intracellular accumulation of abnormal forms of tau protein in neurons and glial cells, which negatively affect microtubule stability. Under physiological conditions, tubulin-associated unit (Tau) protein is intrinsically disordered, almost without secondary structure, and is not prone to aggregation. In AD, it assembles, and forms paired helical filaments (PHFs) that further build-up neurofibrillary tangles (NFTs). Aggregates are composed of hyperphosphorylated tau protein that is more prone to aggregation. The pathology of AD is also linked to disturbed copper homeostasis, which promotes oxidative stress (OS). Copper imbalance is widely observed in AD patients. Deregulated copper ions may initiate and exacerbate tau hyperphosphorylation and formation of β-sheet-rich tau fibrils that ultimately contribute to synaptic failure, neuronal death, and cognitive decline observed in AD patients. The present review summarizes factors affecting the process of tau aggregation, conformational changes of small peptide sequences in the microtubule-binding domain required for these motifs to act as seeding sites in aggregation, and the role of copper in OS induction, tau hyperphosphorylation and tau assembly. A better understanding of the various factors that affect tau aggregation under OS conditions may reveal new targets and novel pharmacological approaches for the therapy of AD.
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Affiliation(s)
- Klara Zubčić
- Laboratory for Developmental Neuropathology, Department for Neuroscience, Croatian Institute for Brain Research, University of Zagreb Medical School, Zagreb, Croatia
| | - Patrick R Hof
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Ronald M. Loeb Center for Alzheimer's Disease, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Goran Šimić
- Laboratory for Developmental Neuropathology, Department for Neuroscience, Croatian Institute for Brain Research, University of Zagreb Medical School, Zagreb, Croatia
| | - Maja Jazvinšćak Jembrek
- Laboratory for Protein Dynamics, Division of Molecular Medicine, Ruđer Bošković Institute, Zagreb, Croatia.,Department of Psychology, Catholic University of Croatia, Zagreb, Croatia
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12
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Lukács M, Szunyog G, Grenács Á, Lihi N, Kállay C, Di Natale G, Campagna T, Lanza V, Tabbi G, Pappalardo G, Sóvágó I, Várnagy K. Copper(II) Coordination Abilities of the Tau Protein's N-Terminus Peptide Fragments: A Combined Potentiometric, Spectroscopic and Mass Spectrometric Study. Chempluschem 2020; 84:1697-1708. [PMID: 31943878 DOI: 10.1002/cplu.201900504] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/19/2019] [Indexed: 12/20/2022]
Abstract
Copper(II) complexes of the N-terminal peptide fragments of tau protein have been studied by potentiometric and various spectroscopic techniques (UV-vis, CD, ESR and ESI-MS). The octapeptide Tau(9-16) (Ac-EVMEDHAG-NH2 ) contains the H14 residue of the native protein, while Tau(26-33) (Ac-QGGYTMHQ-NH2 ) and its mutants Tau(Q26K-Q33K) (Ac-KGGYTMHK-NH2 ) and Tau(Q26K-Y29A-Q33K) (Ac-KGGATMHK-NH2 ) include the H32 residue. To compare the binding ability of H14 and H32 in a single molecule the decapeptide Ac-EDHAGTMHQD-NH2 (Tau(12-16)(30-34)) has also been synthesized and studied. The histidyl residue is the primary metal binding site for metal ions in all the peptide models studied. In the case of Tau(9-16) the side chain carboxylate functions enhance the stability of the M-Nim coordinated complexes compared to Tau(26-33) (logK(Cu-Nim )=5.04 and 3.78, respectively). Deprotonation and metal ion coordination of amide groups occur around the physiological pH range for copper(II). The formation of the imidazole- and amide-coordinated species changes the metal ion preference and the complexes formed with the peptides containing the H32 residue predominate over those of H14 at physiological pH values (90 %-10 %) and in alkaline samples (96 %-4 %).
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Affiliation(s)
- Márton Lukács
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Györgyi Szunyog
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Ágnes Grenács
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Norbert Lihi
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary.,MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Csilla Kállay
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Giuseppe Di Natale
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18., 95126, Catania, Italy
| | - Tiziana Campagna
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18., 95126, Catania, Italy
| | - Valeria Lanza
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18., 95126, Catania, Italy
| | - Giovanni Tabbi
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18., 95126, Catania, Italy
| | - Giuseppe Pappalardo
- CNR-Istituto di Cristallografia (IC), s.s. Catania, Via Paolo Gaifami 18., 95126, Catania, Italy
| | - Imre Sóvágó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4032, Debrecen, Hungary
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13
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Bacchella C, Gentili S, Bellotti D, Quartieri E, Draghi S, Baratto MC, Remelli M, Valensin D, Monzani E, Nicolis S, Casella L, Tegoni M, Dell'Acqua S. Binding and Reactivity of Copper to R 1 and R 3 Fragments of tau Protein. Inorg Chem 2019; 59:274-286. [PMID: 31820933 DOI: 10.1021/acs.inorgchem.9b02266] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Tau protein is present in significant amounts in neurons, where it contributes to the stabilization of microtubules. Insoluble neurofibrillary tangles of tau are associated with several neurological disorders known as tauopathies, among which is Alzheimer's disease. In neurons, tau binds tubulin through its microtubule binding domain which comprises four imperfect repeats (R1-R4). The histidine residues contained in these fragments are potential binding sites for metal ions and are located close to the regions that drive the formation of amyloid aggregates of tau. In this study, we present a detailed characterization through potentiometric and spectroscopic methods of the binding of copper in both oxidation states to R1 and R3 peptides, which contain one and two histidine residues, respectively. We also evaluate how the redox cycling of copper bound to tau peptides can mediate oxidation that can potentially target exogenous substrates such as neuronal catecholamines. The resulting quinone oxidation products undergo oligomerization and can competitively give post-translational peptide modifications yielding catechol adducts at amino acid residues. The presence of His-His tandem in the R3 peptide strongly influences both the binding of copper and the reactivity of the resulting copper complex. In particular, the presence of the two adjacent histidines makes the copper(I) binding to R3 much stronger than in R1. The copper-R3 complex is also much more active than the copper-R1 complex in promoting oxidative reactions, indicating that the two neighboring histidines activate copper as a catalyst in molecular oxygen activation reactions.
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Affiliation(s)
- Chiara Bacchella
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Silvia Gentili
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale , Università di Parma , Parco Area delle Scienze 11/A , 43124 Parma , Italy
| | - Denise Bellotti
- Dipartimento di Scienze Chimiche e Farmaceutiche , Università di Ferrara , Via Luigi Borsari 46 , 44121 Ferrara , Italy
| | - Eleonora Quartieri
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale , Università di Parma , Parco Area delle Scienze 11/A , 43124 Parma , Italy
| | - Sara Draghi
- Dipartimento di Biotecnologie, Chimica e Farmacia , Università di Siena , Via A. Moro 2 , 53100 , Siena , Italy
| | - Maria Camilla Baratto
- Dipartimento di Biotecnologie, Chimica e Farmacia , Università di Siena , Via A. Moro 2 , 53100 , Siena , Italy
| | - Maurizio Remelli
- Dipartimento di Scienze Chimiche e Farmaceutiche , Università di Ferrara , Via Luigi Borsari 46 , 44121 Ferrara , Italy
| | - Daniela Valensin
- Dipartimento di Biotecnologie, Chimica e Farmacia , Università di Siena , Via A. Moro 2 , 53100 , Siena , Italy
| | - Enrico Monzani
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Stefania Nicolis
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Luigi Casella
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
| | - Matteo Tegoni
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilità Ambientale , Università di Parma , Parco Area delle Scienze 11/A , 43124 Parma , Italy
| | - Simone Dell'Acqua
- Dipartimento di Chimica , Università di Pavia , Via Taramelli 12 , 27100 Pavia , Italy
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14
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Ahmadi S, Zhu S, Sharma R, Wu B, Soong R, Dutta Majumdar R, Wilson DJ, Simpson AJ, Kraatz HB. Aggregation of Microtubule Binding Repeats of Tau Protein is Promoted by Cu 2. ACS OMEGA 2019; 4:5356-5366. [PMID: 31001602 PMCID: PMC6463671 DOI: 10.1021/acsomega.8b03595] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Understanding the factors that give rise to tau aggregation and reactive oxygen species (ROS) is the key aspect in Alzheimer's disease pathogenesis. Microtubule (MT) binding repeats of tau protein were suggested to play a critical role in tau aggregation. Here, we show that the interaction of Cu2+ with full-length MT binding repeats R1-R4 leads to the aggregation, and a Cys-based redox chemistry is critically involved in tau aggregation leading to disulfide-bridge dimerization of R2 and R3 and further aggregation into a fibrillar structure. Notably, ascorbate and glutathione, the most abundant antioxidants in neurons, cannot prevent the effect of Cu2+ on R2 and R3 aggregation. Detailed ESI-MS and NMR experiments demonstrate the interaction of Cu2+ with MT binding repeats. We show that redox activity of copper increases when bound to the MT repeats leading to ROS formation, which significantly contribute to cellular damage and neuron death. Results presented here provide new insights into the molecular mechanism of tau aggregation and ROS formation and suggest a new target domain for tau aggregation inhibitors.
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Affiliation(s)
- Soha Ahmadi
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - Shaolong Zhu
- Chemistry
Department, York University, Toronto, Ontario M3J1P3, Canada
- The
Centre for Research in Mass Spectrometry, York University, 4700 Keele Street, Toronto, Ontario M3J1P3, Canada
| | - Renu Sharma
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Bing Wu
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Ronald Soong
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - R. Dutta Majumdar
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
| | - Derek J. Wilson
- Chemistry
Department, York University, Toronto, Ontario M3J1P3, Canada
- The
Centre for Research in Mass Spectrometry, York University, 4700 Keele Street, Toronto, Ontario M3J1P3, Canada
| | - Andre J. Simpson
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
| | - Heinz-Bernhard Kraatz
- Department
of Physical and Environmental Science, University
of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department
of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 1A1, Canada
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15
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Ritsch I, Hintz H, Jeschke G, Godt A, Yulikov M. Improving the accuracy of Cu(ii)–nitroxide RIDME in the presence of orientation correlation in water-soluble Cu(ii)–nitroxide rulers. Phys Chem Chem Phys 2019; 21:9810-9830. [DOI: 10.1039/c8cp06573j] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Detailed analysis of artefacts in the Cu(ii)–nitroxide RIDME experiments, related to orientation averaging, echo-crossing, ESEEM and background-correction is presented.
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Affiliation(s)
- Irina Ritsch
- Laboratory of Physical Chemistry
- Department of Chemistry and Applied Bioscience
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Henrik Hintz
- Faculty of Chemistry and Center for Molecular Materials (CM2)
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry
- Department of Chemistry and Applied Bioscience
- ETH Zurich
- 8093 Zurich
- Switzerland
| | - Adelheid Godt
- Faculty of Chemistry and Center for Molecular Materials (CM2)
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Maxim Yulikov
- Laboratory of Physical Chemistry
- Department of Chemistry and Applied Bioscience
- ETH Zurich
- 8093 Zurich
- Switzerland
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16
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Shenberger Y, Marciano O, Gottlieb HE, Ruthstein S. Insights into the N-terminal Cu(II) and Cu(I) binding sites of the human copper transporter CTR1. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1492717] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yulia Shenberger
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Ortal Marciano
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Hugo E. Gottlieb
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
| | - Sharon Ruthstein
- The Department of Chemistry, Faculty of Exact Sciences, Bar-Ilan University, Ramat-Gan, Israel
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17
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Di Natale G, Bellia F, Sciacca MF, Campagna T, Pappalardo G. Tau-peptide fragments and their copper(II) complexes: Effects on Amyloid-β aggregation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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18
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Pirota V, Monzani E, Dell'Acqua S, Casella L. Interactions between heme and tau-derived R1 peptides: binding and oxidative reactivity. Dalton Trans 2016; 45:14343-51. [PMID: 27539650 DOI: 10.1039/c6dt02183b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The interaction of hemin with the first 18-amino acid repeat in tau protein has been investigated at both the N-terminal free-amine (R1τ) and N-acetylated (AcR1τ) forms for its potential relevance in traumatic brain injury and possibly other neurodegenerative diseases. The binding properties of hemin-R1τ and hemin-AcR1τ were compared with those of the hemin complex with amyloid-β peptide fragment 1-16 (Aβ16) and synthetic hemins. AcR1τ and R1τ bind with moderate affinity to both monomeric and dimeric hemin to form 1 : 1 complexes, but for the acetylated peptide, the affinity is one order of magnitude larger (K1 = 3.3 × 10(6) M(-1)). The binding constants were similar to that of Aβ16 for hemin, but unlike the latter, neither of the two R1τ peptides forms a 2 : 1 complex with hemin. This is mostly due to electrostatic repulsion between R1τ chains, and in particular the C-terminal proline-15 kink, while structural features of the hemin-R1τ complexes do not seem to play a role. In fact, the same features are observed for the interaction between ferric heme and peptide R1τ*, where the P15 residue is replaced by an alanine. Imidazole neither binds to [hemin(R1τ)] nor [hemin(AcR1τ)], whereas small ligands such as CN and CO easily bind to the ferric and ferrous forms of the complexes, respectively. A detailed comparative study of the peroxidase activity of [hemin(R1τ)] and [hemin(AcR1τ)] shows that such activity is very low. Thus, the association between heme and unfolded neuronal peptides does not, per se, involve a significant gain of toxic pseudo-enzymatic activity. However, under conditions of heavy heme release occurring on traumatic brain injury or when this activity is prolonged for long time, it can contribute to neuronal oxidative stress. In addition, the presence of hemin increases the aggregation propensity of R1τ.
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Affiliation(s)
- V Pirota
- Dipartimento di Chimica, Università di Pavia, Via Taramelli 12, 27100 Pavia, Italy.
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19
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Evaluation of ferritin and transferrin binding to tau protein. J Inorg Biochem 2016; 162:127-134. [PMID: 27356954 DOI: 10.1016/j.jinorgbio.2016.06.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 06/13/2016] [Accepted: 06/16/2016] [Indexed: 11/23/2022]
Abstract
Tau protein is a neurodegeneration biomarker. Due to the high concentration of metal ions in the brain, the metallation of tau proteins and their catalytic role in reactive oxygen formation have been identified as a major biochemical pathway of neurodegeneration. High levels of iron ions have been detected in Alzheimer's disease brains. One of biological sources of iron ions are iron-rich proteins, such as transferrin or ferritin. However, the interactions between tau and these metallo-proteins have not been fully characterized. Here, the interactions between the longest form of full-length tau protein (tau441) with iron-rich proteins were detected using electrochemical impedance spectroscopy. Tau441 was immobilized on Au surface, via N-terminal (N-tau-Au film) or Cys-residues (Cys-tau-Au film), and the charge-transfer resistance, Rct, was monitored prior and post ferritin or transferrin binding. Significant increase in Rct was observed post transferrin binding above 50μgmL-1, but not ferritin regardless of concentration with N-tau-Au film. Additionally, the electrochemical trend was linear with respect to transferrin concentration. Electrochemical data indicated low binding by ferritin to N-tau-Au or Cys-tau-Au films. The interaction of apotransferrin or apoferritin with tau films was also evaluated. Electrochemical data may be pointing to the differences in protein binding modes by transferrin compared to ferritin as well as to importance of metal ions in protein-protein interactions.
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20
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Du X, Zheng Y, Wang Z, Chen Y, Zhou R, Song G, Ni J, Liu Q. Inhibitory Act of Selenoprotein P on Cu+/Cu2+-Induced Tau Aggregation and Neurotoxicity. Inorg Chem 2014; 53:11221-30. [DOI: 10.1021/ic501788v] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiubo Du
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Youbiao Zheng
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhi Wang
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yijing Chen
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Rui Zhou
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Guoli Song
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jiazuan Ni
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
| | - Qiong Liu
- Department
of Marine Biology, Shenzhen Key Laboratory of Marine Biotechnology
and Ecology and ‡College of Life Sciences, Shenzhen Key Laboratory of Microbial Genetic
Engineering, Shenzhen University, Shenzhen 518060, China
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21
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Silva KI, Michael BC, Geib SJ, Saxena S. ESEEM analysis of multi-histidine Cu(II)-coordination in model complexes, peptides, and amyloid-β. J Phys Chem B 2014; 118:8935-44. [PMID: 25014537 PMCID: PMC4120975 DOI: 10.1021/jp500767n] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We validate the use of ESEEM to predict the number of (14)N nuclei coupled to a Cu(II) ion by the use of model complexes and two small peptides with well-known Cu(II) coordination. We apply this method to gain new insight into less explored aspects of Cu(II) coordination in amyloid-β (Aβ). Aβ has two coordination modes of Cu(II) at physiological pH. A controversy has existed regarding the number of histidine residues coordinated to the Cu(II) ion in component II, which is dominant at high pH (∼8.7) values. Importantly, with an excess amount of Zn(II) ions, as is the case in brain tissues affected by Alzheimer's disease, component II becomes the dominant coordination mode, as Zn(II) selectively substitutes component I bound to Cu(II). We confirm that component II only contains single histidine coordination, using ESEEM and set of model complexes. The ESEEM experiments carried out on systematically (15)N-labeled peptides reveal that, in component II, His 13 and His 14 are more favored as equatorial ligands compared to His 6. Revealing molecular level details of subcomponents in metal ion coordination is critical in understanding the role of metal ions in Alzheimer's disease etiology.
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Affiliation(s)
- K Ishara Silva
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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22
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Martic S, Rains MK, Kraatz HB. Probing copper/tau protein interactions electrochemically. Anal Biochem 2013; 442:130-7. [DOI: 10.1016/j.ab.2013.07.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 07/05/2013] [Accepted: 07/09/2013] [Indexed: 01/08/2023]
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23
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Azimi S, Rauk A. Fe(III)–Heme Complexes with the Amyloid Beta Peptide of Alzheimer’s Disease: QM/MM Investigations of Binding and Redox Properties of Heme Bound to the His Residues of Aβ(1–42). J Chem Theory Comput 2013; 9:4233-42. [DOI: 10.1021/ct400364b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Samira Azimi
- Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Arvi Rauk
- Department of Chemistry, The University of Calgary, Calgary, Alberta, Canada T2N 1N4
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24
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Gredičak M, Bregović N, Carić D, Jerić I. Amino acid-based tweezers: the role of turn-like conformation in the binding of copper(II). J Inorg Biochem 2012; 116:45-52. [PMID: 23010328 DOI: 10.1016/j.jinorgbio.2012.07.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 07/10/2012] [Accepted: 07/11/2012] [Indexed: 10/28/2022]
Abstract
The importance of turn-like peptide conformation for the copper(II) binding has been revealed by the synthesis of simple amino acid-based tweezers and the study of their interaction with copper(II). Amino acids Phe, Leu, Val, Ala and Gly were bridged through their C-terminuses with conformationally constrained motif, cis enediyne moiety ((Z)-octa-4-en-2,6-diyne-1,8-diamine). The interaction of prepared diamine ligands with copper(II) was studied by means of potentiometric titrations, UV-visible and EPR spectroscopic and mass spectrometric techniques. All ligands interact efficiently with copper(II) and form complexes of 1:1 stoichiometry differing in the protonation state of the ligand. LCu(2+) species were found predominant at pH<6.5, with log K* ranging from -8.06 to -6.65, while at higher pH deprotonation occurred, giving rise to LH(-1)Cu(+) complexes or LH(-2)Cu complex for the phenylalanine-related ligand. An additional species, LH(-3)Cu(-) were found at pH>9 for the valine- and alanine-related ligands, respectively. Comparing stability of studied complexes with those reported in previous work revealed that ligands effectively emulate properties of copper(II) binding peptides. Based on the results obtained in this work it can be concluded that structural rigidity significantly enhances coordination properties of the ligand, thus conforming importance of the turn-like peptide conformation for the copper(II) binding.
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Affiliation(s)
- Matija Gredičak
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
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Azimi S, Rauk A. The Binding of Fe(II)–Heme to the Amyloid Beta Peptide of Alzheimer’s Disease: QM/MM Investigations. J Chem Theory Comput 2012; 8:5150-8. [DOI: 10.1021/ct300716p] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Samira Azimi
- Department of Chemistry, The University of Calgary,
Calgary, Alberta, Canada T2N 1N4
| | - Arvi Rauk
- Department of Chemistry, The University of Calgary,
Calgary, Alberta, Canada T2N 1N4
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Eskici G, Axelsen PH. Copper and Oxidative Stress in the Pathogenesis of Alzheimer’s Disease. Biochemistry 2012; 51:6289-311. [DOI: 10.1021/bi3006169] [Citation(s) in RCA: 204] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Gözde Eskici
- Departments of Pharmacology, Biochemistry and Biophysics,
and Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, United
States
| | - Paul H. Axelsen
- Departments of Pharmacology, Biochemistry and Biophysics,
and Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania 19104, United
States
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