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Cukierman DS, Bodnár N, Diniz R, Nagy L, Kállay C, Rey NA. Full Equilibrium Picture in Aqueous Binary and Ternary Systems Involving Copper(II), 1-Methylimidazole-Containing Hydrazonic Ligands, and the 103-112 Human Prion Protein Fragment. Inorg Chem 2021; 61:723-737. [PMID: 34918515 DOI: 10.1021/acs.inorgchem.1c03598] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work, we describe two novel 1-methylimidazole N-acylhydyrazonic ligands and their interaction with copper(II) in solution. Binary systems constituted by each of these hydrazones and the metal ion were studied by potentiometric titrations. The magnitude of their affinities for zinc(II) was also determined for the sake of comparison. Additionally, a full evaluation of the copper(II) chelation profile of the new ligands in ternary systems containing a human prion protein fragment was performed. Mixed ligand complexes comprising the HuPrP103-112 fragment, copper(II) ions, and an N-acylhydrazone were characterized by potentiometry, ultraviolet-visible spectroscopy, and circular dichroism. Some of these species were also identified by electrospray ionization mass spectrometry and unequivocally assigned through their isotopic distribution pattern. To the best of our knowledge, this is the first report concerning the stability of ternary complexes involving a hydrazonic metal-protein interaction modulator, copper, and a peptide. The ability of N-acylhydrazones to prevent peptide oxidation was also examined. Both ligands can partially prevent the formation of the doubly oxidized product, a process mediated by copper(II) ions. Oxidative stress is considered an important hallmark of neurodegenerative diseases such as prion-related spongiform encephalopathies. In this context, active intervention with respect to the deleterious copper-catalyzed methionine oxidation could represent an interesting therapeutic approach.
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Affiliation(s)
- Daphne S Cukierman
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil
| | - Nikolett Bodnár
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen 4032, Hungary
| | - Renata Diniz
- Department of Chemistry, ICEx, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil
| | - Lajos Nagy
- Department of Applied Chemistry, University of Debrecen, Debrecen 4032, Hungary
| | - Csilla Kállay
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Debrecen 4032, Hungary
| | - Nicolás A Rey
- Department of Chemistry, Pontifical Catholic University of Rio de Janeiro, Rio de Janeiro 22451-900, Brazil
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Sánchez-López C, Quintanar L. β-cleavage of the human prion protein impacts Cu(II) coordination at its non-octarepeat region. J Inorg Biochem 2021; 228:111686. [PMID: 34929540 DOI: 10.1016/j.jinorgbio.2021.111686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/25/2021] [Accepted: 11/28/2021] [Indexed: 11/26/2022]
Abstract
The cellular prion protein (PrPC) is a membrane-anchored copper binding protein that undergoes proteolytic processing. β-cleavage of PrPC is associated with a pathogenic condition and it yields two fragments: N2 with residues 23-89, and C2 including residues 90-231. The membrane-bound C2 fragment retains the Cu binding sites at His96 and His111, but it also has a free N-terminal NH2 group. In this study, the impact of β-cleavage of PrPC in its Cu(II) binding properties was evaluated, using the peptide of the human prion protein hPrP(90-115) as a model for the C2 fragment. The Cu(II) coordination properties of hPrP(90-115) were studied using circular dichroism (CD) and electron paramagnetic resonance (EPR); while the H96A and H111A substitutions and its acetylated variants were also studied. Cu binding to hPrP(90-115) is dependent on metal ion concentration: At low copper concentrations the participation of His96 and free NH2-terminus is evident, while at high copper concentrations the His111 site is populated without participation of the N-terminal NH2 group. The presence of a free NH2-terminal group in the C2 fragment significantly impacts the Cu(II) coordination properties of the His96 site, where the NH2 group also anchors the metal ion. This study provides further insights into the impact of proteolytic processing of PrPC in the Cu binding properties of this important neuronal protein.
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Affiliation(s)
- Carolina Sánchez-López
- Department of Chemistry, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico
| | - Liliana Quintanar
- Department of Chemistry, Center for Research and Advanced Studies (Cinvestav), Mexico City, Mexico.
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3
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Shiraishi N, Hirano Y. Combination of Copper Ions and Nucleotide Generates Aggregates from Prion Protein Fragments in the N-Terminal Domain. Protein Pept Lett 2021; 27:782-792. [PMID: 32096738 DOI: 10.2174/0929866527666200225124829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/13/2019] [Accepted: 12/17/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND It has been previously found that PrP23-98, which contains four highly conserved octarepeats (residues 60-91) and one partial repeat (residues 92-96), polymerizes into amyloid-like and proteinase K-resistant spherical aggregates in the presence of NADPH plus copper ions. OBJECTIVE We aimed to determine the requirements for the formation of these aggregates. METHODS In this study, we performed an aggregation experiment using N-acetylated and Camidated PrP fragments of the N-terminal domain, Octa1, Octa2, Octa3, Octa4, PrP84-114, and PrP76-114, in the presence of NADPH with copper ions, and focused on the effect of the number of copper-binding sites on aggregation. RESULTS Among these PrP fragments, Octa4, containing four copper-binding sites, was particularly effective in forming aggregates. We also tested the effect of other pyridine nucleotides and adenine nucleotides on the aggregation of Octa4. ATP was equally effective, but NADH, NADP, ADP, and AMP had no effect. CONCLUSION The phosphate group on the adenine-linked ribose moiety of adenine nucleotides and pyridine nucleotides is presumed to be essential for the observed effect on aggregation. Efficient aggregation requires the presence of the four octarepeats. These insights may be helpful in the eventual development of therapeutic agents against prion-related disorders.
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Affiliation(s)
- Noriyuki Shiraishi
- Department of Nutrition, Tokai Gakuen University, 2-901 Nakahira, Nagoya 468-8514, Japan
| | - Yoshiaki Hirano
- Department of Nutrition, Tokai Gakuen University, 2-901 Nakahira, Nagoya 468-8514, Japan
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4
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Stokowa-Sołtys K, Dzyhovskyi V, Wieczorek R, Jeżowska-Bojczuk M. Coordination pattern and reactivity of two model peptides from porin protein P1. J Inorg Biochem 2020; 215:111332. [PMID: 33340803 DOI: 10.1016/j.jinorgbio.2020.111332] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/17/2020] [Accepted: 12/05/2020] [Indexed: 12/17/2022]
Abstract
It has been reported that numerous of Fusobacterium nucleatum outer membrane proteins take part in cancerogenesis. Therefore, it is very interesting to study their interactions with metal ions and the ability to produce reactive oxygen species, which may be involved in cancer progression. Since investigations of metal binding to proteins are often based on fragments that contain the metal-binding domains, designing model peptides should be very mindful. As was shown in this paper, very similar protein fragments may behave differentially. Herein, combined potentiometric, spectroscopic, and computational studies were performed to determine metal ion binding by ligands constituting fragments of porin protein P1. Two studied tetrapeptides (Ac-KEHK-NH2 and Ac-EHKA-NH2) that have common EHK motif have different coordination properties and reactivity. Therefore, we should be cautious when transferring the behavior of small peptide fragments to whole protein.
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Affiliation(s)
- Kamila Stokowa-Sołtys
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland.
| | - Valentyn Dzyhovskyi
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
| | - Robert Wieczorek
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
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Perinelli M, Tegoni M, Freisinger E. Different Behavior of the Histidine Residue toward Cadmium and Zinc in a Cadmium-Specific Metallothionein from an Aquatic Fungus. Inorg Chem 2020; 59:16988-16997. [DOI: 10.1021/acs.inorgchem.0c02171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Monica Perinelli
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Matteo Tegoni
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17A, 43124 Parma, Italy
| | - Eva Freisinger
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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6
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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: 26] [Impact Index Per Article: 5.2] [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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Hecel A, Kolkowska P, Krzywoszynska K, Szebesczyk A, Rowinska-Zyrek M, Kozlowski H. Ag+ Complexes as Potential Therapeutic Agents in Medicine and Pharmacy. Curr Med Chem 2019; 26:624-647. [DOI: 10.2174/0929867324666170920125943] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 07/28/2017] [Accepted: 08/09/2017] [Indexed: 12/17/2022]
Abstract
Silver is a non-essential element with promising antimicrobial and anticancer properties. This work is a detailed summary of the newest findings on the bioinorganic chemistry of silver, with a special focus on the applications of Ag+ complexes and nanoparticles. The coordination chemistry of silver is given a reasonable amount of attention, summarizing the most common silver binding sites and giving examples of such binding motifs in biologically important proteins. Possible applications of this metal and its complexes in medicine, particularly as antibacterial and antifungal agents and in cancer therapy, are discussed in detail. The most recent data on silver nanoparticles are also summarized.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50383 Wroclaw, Poland
| | - Paulina Kolkowska
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, via A. Moro 2, 53100 Siena, Italy
| | - Karolina Krzywoszynska
- Institute of Cosmetology, Public Higher Medical Professional School in Opole, Katowicka 68, 45060 Opole, Poland
| | - Agnieszka Szebesczyk
- Institute of Cosmetology, Public Higher Medical Professional School in Opole, Katowicka 68, 45060 Opole, Poland
| | | | - Henryk Kozlowski
- Institute of Cosmetology, Public Higher Medical Professional School in Opole, Katowicka 68, 45060 Opole, Poland
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Hecel A, Valensin D, Kozłowski H. How copper ions and membrane environment influence the structure of the human and chicken tandem repeats domain? J Inorg Biochem 2018; 191:143-153. [PMID: 30529722 DOI: 10.1016/j.jinorgbio.2018.11.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 11/19/2018] [Accepted: 11/21/2018] [Indexed: 12/14/2022]
Abstract
Prion proteins (PrPs) from different species have the enormous ability to anchor copper ions. The N-terminal domain of human prion protein (hPrP) contains four tandem repeats of the -PHGGGWGQ- octapeptide sequence. This octarepeat domain can bind up to four Cu2+ ions. Similarly to hPrP, chicken prion protein (chPrP) is able to interact with Cu2+ through the tandem hexapeptide -HNPGYP- region (residues 53-94). In this work, we focused on the human octapeptide repeat (human Octa4, hPrP60-91) (Ac-PHGGGWGQPHGGGWGQPHGGGWGQPHGGGWGQ-NH2) and chicken hexapeptide repeat (chicken Hexa4, chPrP54-77) (Ac-HNPGYPHNPGYPHNPGYPHNPGYP-NH2) prion protein fragments. Due to the fact that PrP is a membrane-anchored glycoprotein and its unstructured and flexible N-terminal domain may interact with the lipid bilayer, our studies were carried out in presence of the surfactant sodium dodecyl sulfate (SDS) mimicking the membrane environment in vitro. The main objective of this work was to understand the effects of copper ion on the structural rearrangements of the human and chicken N-terminal repeat domain. The obtained results provide a fundamental first step in describing the thermodynamic (potentiometric titrations) and structural properties of Cu(II) binding (UV-Vis, NMR, CD spectroscopy) to both human Octa4 and chicken Hexa4 repeats in both a DMSO/water and SDS micelle environment. Interestingly, in SDS environment, both ligands indicate different copper coordination modes, which results of the conformational changes in micelle environment. Our results strongly support that copper binding mode strongly depends on the protein backbone structure. Moreover, we focused on previously obtained results for amyloidogenic human and chicken fragments in membrane mimicking environment.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50383 Wroclaw, Poland.
| | - Daniela Valensin
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Henryk Kozłowski
- Opole Medical School in Opole, Katowicka 68, 45060 Opole, Poland
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9
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10
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Hecel A, Draghi S, Valensin D, Kozlowski H. The effect of a membrane-mimicking environment on the interactions of Cu 2+ with an amyloidogenic fragment of chicken prion protein. Dalton Trans 2018; 46:7758-7769. [PMID: 28589973 DOI: 10.1039/c7dt01069a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Prion proteins (PrP) from different species have the ability to tightly bind Cu2+ ions. Copper coordination sites are located in the disordered and flexible N-terminal region which contains several His anchoring sites. Among them, two His residues are found in the so called amyloidogenic PrP region which is believed to play a key role in the process leading to oligomer and fibril formation. Both chicken and human amyloidogenic regions have a hydrophobic C-terminal region rich in Ala and Val amino acids. Recent findings revealed that this domain undergoes random coil to α-helix structuring upon interaction with membrane models. This interaction might strongly impact metal binding abilities either in terms of donor sets or affinity. In this study we investigated Cu2+ interaction with an amyloidogenic fragment, chPrP105-140, derived from chicken prion protein (chPrP), in different solution environments. The behavior of the peptide and its metal complexes was analyzed in water and in the presence of negative and positive charged membrane mimicking environments formed by sodium dodecyl sulfate (SDS) and dodecyl trimethyl ammonium chloride (DTAC) micelles. The metal coordination sphere, the metal binding affinity and stoichiometry were evaluated by combining spectroscopic and potentiometric methods. Finally we compare copper(ii) interactions with human and chicken amyloidogenic fragments. Our results indicate that the chicken amyloidogenic fragment is a stronger copper ligand than the human amyloidogenic fragment.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14., 50-383 Wroclaw, Poland
| | - Sara Draghi
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100 Siena, Italy.
| | - Daniela Valensin
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Via A. Moro 2, 53100 Siena, Italy.
| | - Henryk Kozlowski
- Public Higher Medical Professional School in Opole, Katowicka 68, 45060 Opole, Poland
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11
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Hecel A, Wątły J, Rowińska-Żyrek M, Świątek-Kozłowska J, Kozłowski H. Histidine tracts in human transcription factors: insight into metal ion coordination ability. J Biol Inorg Chem 2018; 23:81-90. [PMID: 29218639 PMCID: PMC5756558 DOI: 10.1007/s00775-017-1512-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 11/03/2017] [Indexed: 12/19/2022]
Abstract
Consecutive histidine repeats are chosen both by nature and by molecular biologists due to their high affinity towards metal ions. Screening of the human genome showed that transcription factors are extremely rich in His tracts. In this work, we examine two of such His-rich regions from forkhead box and MAFA proteins-MB3 (contains 18 His) and MB6 (with 21 His residues), focusing on the affinity and binding modes of Cu2+ and Zn2+ towards the two His-rich regions. In the case of Zn2+ species, the availability of imidazole nitrogen donors enhances metal complex stability. Interestingly, an opposite tendency is observed for Cu2+ complexes at above physiological pH, in which amide nitrogens participate in binding.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383, Wrocław, Poland.
| | - Joanna Wątły
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | | | | | - Henryk Kozłowski
- Public Higher Medical Professional School in Opole, Katowicka 68, 45-060, Opole, Poland.
- Wroclaw Research Centre EIT+, Stabłowicka 147, 54-066, Wrocław, Poland.
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12
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Kołkowska P, Hecel A, Kędzierska D, Ostrowska M, Walencik PK, Wątły J, Zdyb K, Spodzieja M, Rodziewicz-Motowidło S, Potocki S, Łuczkowski M, Gumienna-Kontecka E, Rowińska-Żyrek M. HENRYK - An endless source of metal coordination surprises. J Inorg Biochem 2016; 163:258-265. [PMID: 26952650 DOI: 10.1016/j.jinorgbio.2016.02.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/05/2016] [Accepted: 02/25/2016] [Indexed: 11/27/2022]
Abstract
The basic knowledge about biological inorganic chemistry, thermodynamics and metal binding sites of metalloproteins is crucial for the understanding of their metal binding-structure-function relationship. Metal-peptide complexes are useful and commonly used models of metal-enzyme active sites, among which copper and zinc models are one of the most extensively studied. HENRYK is a peptide sequence present in numerous proteins, and serves as a potentially tempting binding site for Cu2+ and Zn2+. Maybe more importantly, HENRYK also happens to be the first name of our group leader. The results of this work, which, at the first glance, might seem to be a 'chemical scrabble', went far beyond our expectations and surprised us with a novel, uncommon behavior of a Cu2+ complex with a peptide with a histidine in position one. At low pH, the binding is a typical histamine-like coordination, but with the increase of pH, the imidazole nitrogen is moved to the axial position and replaced with an amide; at basic pH, the binding mode is a {NH2, 3N-} one in the equatorial plane. It is important to note, that no dimeric species are formed in between. Such binding is thermodynamically much more stable than a simple complex with histamine, and quite comparable to complexes with several possible imidazole anchoring sites.
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Affiliation(s)
- Paulina Kołkowska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Dorota Kędzierska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Małgorzata Ostrowska
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Paulina K Walencik
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Joanna Wątły
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Karolina Zdyb
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Marta Spodzieja
- Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland
| | | | - Sławomir Potocki
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Marek Łuczkowski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wrocław, Poland
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Hecel A, Migliorini C, Valensin D, Luczkowski M, Kozlowski H. Impact of SDS surfactant on the interactions of Cu(2+) ions with the amyloidogenic region of human prion protein. Dalton Trans 2016; 44:13125-32. [PMID: 26107283 DOI: 10.1039/c5dt01488c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Prion diseases, known as Transmissible Spongiform Encephalopathies (TSEs), are a group of fatal neuronal, and to some extent infectious disorders, associated with a pathogenic protein agent called prion protein (PrP). The human prion protein (hPrP) fragment encompassing the 91-127 region, also known as the amyloidogenic domain, comprises two copper-binding sites corresponding to His-96 and His-111 residues that act as anchors for Cu(2+) binding. In this work, we investigated Cu(2+) interaction with hPrP91-127 in the presence of the anionic surfactant sodium dodecyl sulfate (SDS), which induces a partial α-helix folding of the peptide. Our data indicate that the Cu(2+) coordination ability of the amyloidogenic fragment in the presence of SDS micelles is significantly different to that observed in aqueous solution. This is mainly due to the fact that SDS micelles strongly stabilize the formation of the α-helical structure of the peptide backbone, which is well conserved also upon Cu(2+) binding, contrary to the random coil conformation mainly assumed by hPrP91-127 in aqueous solutions. Potentiometric and spectroscopic studies clearly indicate that in the case of SDS containing solutions, Cu(2+) ions coordinate simultaneously to both imidazoles, while in the case of water solutions, metal ion coordination involves only a single His side chain, which individually acts as an independent Cu(2+) anchoring site.
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Affiliation(s)
- Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50383 Wroclaw, Poland.
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14
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Pizzanelli S, Forte C, Pinzino C, Magrì A, La Mendola D. Copper(ii) complexes with peptides based on the second cell binding site of fibronectin: metal coordination and ligand exchange kinetics. Phys Chem Chem Phys 2016; 18:3982-94. [DOI: 10.1039/c5cp05798a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Copper(ii) complexes with short peptides based on the second cell binding site of fibronectin, PHSFN and PHSEN, have been characterized by potentiometric, UV-vis, CD, EPR and NMR spectroscopic methods.
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Affiliation(s)
- Silvia Pizzanelli
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Claudia Forte
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Calogero Pinzino
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Antonio Magrì
- Istituto di Biostrutture e Bioimmagini
- Consiglio Nazionale delle Ricerche-CNR
- 95126 Catania
- Italy
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15
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Valensin D, Padula EM, Hecel A, Luczkowski M, Kozlowski H. Specific binding modes of Cu(I) and Ag(I) with neurotoxic domain of the human prion protein. J Inorg Biochem 2015; 155:26-35. [PMID: 26606290 DOI: 10.1016/j.jinorgbio.2015.11.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 10/13/2015] [Accepted: 11/10/2015] [Indexed: 12/25/2022]
Abstract
Prion diseases are neurodegenerative disorders associated with a conformational change of the normal cellular isoform of the prion protein (PrP(C)) to an abnormal scrapie isoform (PrP(Sc)). human prion protein (hPrP(C)) is able to bind up to six Cu(II) ions. Four of them are distributed in the octarepeat domain, containing four tandem-repetitions of the sequence PHGGGWGQ. Immediately outside the octarepeat domain, in so called PrP amyloidogenic region, two additional and independent Cu(II) binding sites, encompassing His96 and His111 residues, respectively, are present. Considering the potential involvement of PrP in cellular redox homeostasis, investigations on Cu(I)-PrP interaction might be also biologically relevant. Interestingly, the amyloidogenic fragment of PrP contains a -M(X)nM- motif, known to act as Cu(I) binding site in different proteins. In order to shed more light on this issue, copper(I) and silver(I) interactions with model peptides derived from that region were analyzed. The results of our studies reveal that both metal ions are anchored to two thioether sulfurs of Met109 and Met112, respectively. Subsequent metal interaction and coordination to His96 and His111 imidazoles are primarily found for Cu(I) at physiological pH. Metal binding was also investigated in the presence of negatively charged micelles formed by the anionic surfactant, sodium dodecyl sulfate (SDS). Our results strongly support that metal binding mode strongly depends on the protein backbone structure. In particular we show that α-helix structuring of the amyloid PrP domain influences both the metal coordination sphere and the binding affinity.
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Affiliation(s)
- Daniela Valensin
- Department of Chemistry, University of Siena, Via A. Moro 2, 53100 Siena, Italy.
| | - Emilia Maria Padula
- Department of Chemistry, University of Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Aleksandra Hecel
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50383 Wroclaw, Poland
| | - Marek Luczkowski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50383 Wroclaw, Poland
| | - Henryk Kozlowski
- Department of Chemistry, University of Siena, Via A. Moro 2, 53100 Siena, Italy
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Di Natale G, Turi I, Pappalardo G, Sóvágó I, Rizzarelli E. Cross-Talk Between the Octarepeat Domain and the Fifth Binding Site of Prion Protein Driven by the Interaction of Copper(II) with the N-terminus. Chemistry 2015; 21:4071-84. [DOI: 10.1002/chem.201405502] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Indexed: 12/21/2022]
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17
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Huang L, Liu X, Cheng B, Huang K. How our bodies fight amyloidosis: effects of physiological factors on pathogenic aggregation of amyloidogenic proteins. Arch Biochem Biophys 2015; 568:46-55. [PMID: 25615529 DOI: 10.1016/j.abb.2015.01.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 01/08/2015] [Accepted: 01/11/2015] [Indexed: 12/15/2022]
Abstract
The process of protein aggregation from soluble amyloidogenic proteins to insoluble amyloid fibrils plays significant roles in the onset of over 30 human amyloidogenic diseases, such as Prion disease, Alzheimer's disease and type 2 diabetes mellitus. Amyloid deposits are commonly found in patients suffered from amyloidosis; however, such deposits are rarely seen in healthy individuals, which may be largely attributed to the self-regulation in vivo. A vast number of physiological factors have been demonstrated to directly affect the process of amyloid formation in vivo. In this review, physiological factors that influence amyloidosis, including biological factors (chaperones, natural antibodies, enzymes, lipids and saccharides) and physicochemical factors (metal ions, pH environment, crowding and pressure, etc.), together with the mechanisms underlying these proteostasis effects, are summarized.
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Affiliation(s)
- Lianqi Huang
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Xinran Liu
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
| | - Biao Cheng
- Department of Pharmacy, Central Hospital of Wuhan, Wuhan, Hubei 430014, PR China
| | - Kun Huang
- Tongji School of Pharmacy, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China; Centre for Biomedicine Research, Wuhan Institute of Biotechnology, Wuhan, Hubei 430075, PR China.
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18
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Stanyon HF, Cong X, Chen Y, Shahidullah N, Rossetti G, Dreyer J, Papamokos G, Carloni P, Viles JH. Developing predictive rules for coordination geometry from visible circular dichroism of copper(II) and nickel(II) ions in histidine and amide main-chain complexes. FEBS J 2014; 281:3945-54. [DOI: 10.1111/febs.12934] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/03/2014] [Accepted: 07/14/2014] [Indexed: 01/08/2023]
Affiliation(s)
- Helen F. Stanyon
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Xiaojing Cong
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
| | - Yan Chen
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Nabeela Shahidullah
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
| | - Giulia Rossetti
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Jülich Supercomputing Center; Forschungszentrum Jülich Germany
- Computational Biomedicine Section INM-9; Institute for Neuroscience and Medicine; Jülich Germany
| | - Jens Dreyer
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
| | - George Papamokos
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Scuola Internazionale Superiore di Studi Avanzati; Trieste Italy
| | - Paolo Carloni
- Computational Biophysics; German Research School for Simulation Sciences (Joint venture of RWTH Aachen University and Forschungszentrum Jülich); Germany
- Institute for Advanced Simulations IAS-5; Computational Biomedicine; Forschungszentrum Jülich Germany
- Computational Biomedicine Section INM-9; Institute for Neuroscience and Medicine; Jülich Germany
| | - John H. Viles
- School of Biological and Chemical Sciences; Queen Mary; University of London; UK
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20
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Evolutionary implications of metal binding features in different species' prion protein: an inorganic point of view. Biomolecules 2014; 4:546-65. [PMID: 24970230 PMCID: PMC4101497 DOI: 10.3390/biom4020546] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/29/2014] [Accepted: 05/06/2014] [Indexed: 12/21/2022] Open
Abstract
Prion disorders are a group of fatal neurodegenerative conditions of mammals. The key molecular event in the pathogenesis of such diseases is the conformational conversion of prion protein, PrPC, into a misfolded form rich in β-sheet structure, PrPSc, but the detailed mechanistic aspects of prion protein conversion remain enigmatic. There is uncertainty on the precise physiological function of PrPC in healthy individuals. Several evidences support the notion of its role in copper homeostasis. PrPC binds Cu2+ mainly through a domain composed by four to five repeats of eight amino acids. In addition to mammals, PrP homologues have also been identified in birds, reptiles, amphibians and fish. The globular domain of protein is retained in the different species, suggesting that the protein carries out an essential common function. However, the comparison of amino acid sequences indicates that prion protein has evolved differently in each vertebrate class. The primary sequences are strongly conserved in each group, but these exhibit a low similarity with those of mammals. The N-terminal domain of different prions shows tandem amino acid repeats with an increasing amount of histidine residues going from amphibians to mammals. The difference in the sequence affects the number of copper binding sites, the affinity and the coordination environment of metal ions, suggesting that the involvement of prion in metal homeostasis may be a specific characteristic of mammalian prion protein. In this review, we describe the similarities and the differences in the metal binding of different species' prion protein, as revealed by studies carried out on the entire protein and related peptide fragments.
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Copper-induced structural propensities of the amyloidogenic region of human prion protein. J Biol Inorg Chem 2014; 19:635-45. [DOI: 10.1007/s00775-014-1132-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 04/02/2014] [Indexed: 12/15/2022]
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22
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Interaction of Cu(II) and Ni(II) with Ypk9 protein fragment via NMR studies. ScientificWorldJournal 2014; 2014:656201. [PMID: 24790577 PMCID: PMC3982466 DOI: 10.1155/2014/656201] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 01/15/2014] [Indexed: 01/27/2023] Open
Abstract
P1D2E3K4H5E6L7 (PK9-H), a fragment of Ypk9, the yeast homologue of the human Park9 protein, was studied for its coordination abilities towards Ni(II) and Cu(II) ions through mono- and bi-dimensional NMR techniques. Both proteins are involved in the transportation of metal ions, including manganese and nickel, from the cytosol to the lysosomal lumen. Ypk9 showed manganese detoxification role, preventing a Mn-induced Parkinsonism (PD) besides mutations in Park9, linked to a juvenile form of the disease. Here, we tested PK9-H with Cu(II) and Ni(II) ions, the former because it is an essential element ubiquitous in the human body, so its trafficking should be strictly regulated and one cannot exclude that Ypk9 may play a role in it, and the latter because, besides being a toxic element for many organisms and involved in different pathologies and inflammation states, it seems that the protein confers protection against it. NMR experiments showed that both cations can bind PK9-H in an effective way, leading to complexes whose coordination mode depends on the pH of the solution. NMR data have been used to build a model for the structure of the major Cu(II) and Ni(II) complexes. Structural changes in the conformation of the peptide with organized side chain orientation promoted by nickel coordination were detected.
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Kozlowski H, Potocki S, Remelli M, Rowinska-Zyrek M, Valensin D. Specific metal ion binding sites in unstructured regions of proteins. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.01.024] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Insertion of beta-alanine in model peptides for copper binding to His96 and His111 of the human prion protein. J Inorg Biochem 2013; 126:104-10. [DOI: 10.1016/j.jinorgbio.2013.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2013] [Revised: 05/29/2013] [Accepted: 05/29/2013] [Indexed: 12/30/2022]
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25
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Emwas AHM, Al-Talla ZA, Guo X, Al-Ghamdi S, Al-Masri HT. Utilizing NMR and EPR spectroscopy to probe the role of copper in prion diseases. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:255-268. [PMID: 23436479 DOI: 10.1002/mrc.3936] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 12/19/2012] [Accepted: 01/11/2013] [Indexed: 06/01/2023]
Abstract
Copper is an essential nutrient for the normal development of the brain and nervous system, although the hallmark of several neurological diseases is a change in copper concentrations in the brain and central nervous system. Prion protein (PrP) is a copper-binding, cell-surface glycoprotein that exists in two alternatively folded conformations: a normal isoform (PrP(C)) and a disease-associated isoform (PrP(Sc)). Prion diseases are a group of lethal neurodegenerative disorders that develop as a result of conformational conversion of PrP(C) into PrP(Sc). The pathogenic mechanism that triggers this conformational transformation with the subsequent development of prion diseases remains unclear. It has, however, been shown repeatedly that copper plays a significant functional role in the conformational conversion of prion proteins. In this review, we focus on current research that seeks to clarify the conformational changes associated with prion diseases and the role of copper in this mechanism, with emphasis on the latest applications of NMR and EPR spectroscopy to probe the interactions of copper with prion proteins.
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Affiliation(s)
- Abdul-Hamid M Emwas
- NMR Core Lab, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia.
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26
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Janicka-Klos A, Porciatti E, Valensin D, Conato C, Remelli M, Oldziej S, Valensin G, Kozlowski H. The unusual stabilization of the Ni2+and Cu2+complexes with NSFRY. Dalton Trans 2013; 42:448-58. [DOI: 10.1039/c2dt31959d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Rowinska-Zyrek M, Witkowska D, Potocki S, Remelli M, Kozlowski H. His-rich sequences – is plagiarism from nature a good idea? NEW J CHEM 2013. [DOI: 10.1039/c2nj40558j] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Metal ions and amyloid fiber formation in neurodegenerative diseases. Copper, zinc and iron in Alzheimer's, Parkinson's and prion diseases. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.05.003] [Citation(s) in RCA: 293] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Zawisza I, Rózga M, Bal W. Affinity of copper and zinc ions to proteins and peptides related to neurodegenerative conditions (Aβ, APP, α-synuclein, PrP). Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.012] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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30
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Copper, zinc and iron in neurodegenerative diseases (Alzheimer's, Parkinson's and prion diseases). Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.013] [Citation(s) in RCA: 306] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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31
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Telpoukhovskaia MA, Orvig C. Werner coordination chemistry and neurodegeneration. Chem Soc Rev 2012; 42:1836-46. [PMID: 22952002 DOI: 10.1039/c2cs35236b] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Neurodegenerative diseases are capturing the world's attention as being the next set of diseases we must tackle collectively. Not only are the patients experiencing gradual cognitive and physical decline in most cases, but these diseases are fatal with no prevention currently available. As these diseases are progressive, providing care and symptom treatment for the ageing population is becoming both a medical and a financial challenge. This review discusses how Werner coordination chemistry plays a role in three diseases - those of Alzheimer's, Parkinson's, and prions. Metal ions are considered to be involved in these diseases in part via their propensity to cause toxic aggregation of proteins. First, the coordination of metal ions, with emphasis on copper(II), to metalloproteins that are hallmarks of these diseases - amyloid β, α-synuclein, and prion, respectively - will be discussed. We will present the current understanding of the metal coordination environments created by the amino acids of these proteins, as well as metal binding affinity. Second, a diverse set of examples of rationally designed metal chelators to outcompete this deleterious binding will be examined based on coordination mode and affinity toward bio-relevant metal ions. Overall, this review will give a general overview of protein and metal chelator coordination environments in neurodegenerative diseases.
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Affiliation(s)
- Maria A Telpoukhovskaia
- Medicinal Inorganic Chemistry Group, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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32
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Magrì A, D'Alessandro F, Distefano DA, Campagna T, Pappalardo G, Impellizzeri G, La Mendola D. Copper(II) coordination properties of the integrin ligand sequence PHSRN and its new β-cyclodextrin conjugates. J Inorg Biochem 2012; 113:15-24. [DOI: 10.1016/j.jinorgbio.2012.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2012] [Revised: 03/30/2012] [Accepted: 04/02/2012] [Indexed: 01/05/2023]
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33
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Remelli M, Valensin D, Toso L, Gralka E, Guerrini R, Marzola E, Kozłowski H. Thermodynamic and spectroscopic investigation on the role of Met residues in Cu(II) binding to the non-octarepeat site of the human prion protein. Metallomics 2012; 4:794-806. [PMID: 22791135 DOI: 10.1039/c2mt20060k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Among the common features shared by neurodegenerative diseases there is the central role played by specific proteins or peptides which accumulate in neurons as insoluble plaques or tangles, containing abnormal amounts of redox-active metal ions, like copper and iron. In the case of transmissible spongiform encephalopathies (TSE), the involved protein is known as "prion protein" (PrP(C)) since "prions" (proteinaceous and infectious) are the agents which make TSE transmissible. It is widely accepted that PrP(C), in its wild-type form, can bind up to six Cu(II) ions, four of them in the so-called "octarepeat domain" and the others in the "fifth (non-octarepeat) binding-site". The latter domain contains two His residues, acting as anchoring sites for Cu(II) ions, and other potential binding residues, such as Lys and Met. While it is widely accepted that Lys residues do not take part in complex-formation, the role of methionines is still debated. In order to shed light on this issue, some peptides have been synthesized, either directly mimicking the sequence of the second half of the fifth binding site of human-PrP(C) (apo-form) or analogues where Met residues have been substituted by n-leucine. In addition, a series of short peptides, containing both His and Met residues in different relative positions, have been investigated, for the sake of comparison. Spectroscopic results, including NMR spectra of systems containing Ni(II) as a probe for the paramagnetic Cu(II) ion, agree on the exclusion of any direct interaction between the sulphur atom of Met residues and the Cu(II) ion already bound to His-imidazole side-chains. However, thermodynamic data show that Met-109 somewhat contributes to stability of complex species and this can be attributed to different electronic and steric effects.
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Affiliation(s)
- Maurizio Remelli
- Dipartimento di Chimica, Università di Ferrara, via L. Borsari 46, 44121 Ferrara, Italy.
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Structural characterization of Cu2+, Ni2+ and Zn2+ binding sites of model peptides associated with neurodegenerative diseases. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2011.07.004] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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35
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Copper(II)-Induced Secondary Structure Changes and Reduced Folding Stability of the Prion Protein. J Mol Biol 2011; 410:369-82. [DOI: 10.1016/j.jmb.2011.05.013] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 05/03/2011] [Accepted: 05/07/2011] [Indexed: 11/19/2022]
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36
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Valensin D, Camponeschi F, Luczkowski M, Baratto MC, Remelli M, Valensin G, Kozlowski H. The role of His-50 of α-synuclein in binding Cu(ii): pH dependence, speciation, thermodynamics and structure. Metallomics 2011; 3:292-302. [DOI: 10.1039/c0mt00068j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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37
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Kozlowski H, Luczkowski M, Remelli M. Prion proteins and copper ions. Biological and chemical controversies. Dalton Trans 2010; 39:6371-85. [PMID: 20422067 DOI: 10.1039/c001267j] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The Prion protein (PrP(c)) involvement in some neurodegenerative diseases is well assessed although its "normal" biological role is not completely understood. It is known that PrP(C) can bind Cu(II) ions with high specificity but the order of magnitude of the corresponding affinity constant(s) is still highly debated. This perspective is an attempt to collect the current knowledge on these topics and to build up a bridge between the biological and the chemical points of view.
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Affiliation(s)
- Henryk Kozlowski
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383, Wroclaw, Poland
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38
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Structural investigation of zymogenic and activated forms of human blood coagulation factor VIII: a computational molecular dynamics study. BMC STRUCTURAL BIOLOGY 2010; 10:7. [PMID: 20184747 PMCID: PMC2837666 DOI: 10.1186/1472-6807-10-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 02/25/2010] [Indexed: 11/10/2022]
Abstract
BACKGROUND Human blood coagulation factor VIII (fVIII) is a large plasma glycoprotein with sequential domain arrangement in the order A1-a1-A2-a2-B-a3-A3-C1-C2. The A1, A2 and A3 domains are interconnected by long linker peptides (a1, a2 and a3) that possess the activation sites. Proteolysis of fVIII zymogen by thrombin or factor Xa results in the generation of the activated form (fVIIIa) which serves as a critical co-factor for factor IXa (fIXa) enzyme in the intrinsic coagulation pathway. RESULTS In our efforts to elucidate the structural differences between fVIII and fVIIIa, we developed the solution structural models of both forms, starting from an incomplete 3.7 A X-ray crystal structure of fVIII zymogen, using explicit solvent MD simulations. The full assembly of B-domainless single-chain fVIII was built between the A1-A2 (Ala1-Arg740) and A3-C1-C2 (Ser1669-Tyr2332) domains. The structural dynamics of fVIII and fVIIIa, simulated for over 70 ns of time scale, enabled us to evaluate the integral motions of the multi-domain assembly of the co-factor and the possible coordination pattern of the functionally important calcium and copper ion binding in the protein. CONCLUSIONS MD simulations predicted that the acidic linker peptide (a1) between the A1 and A2 domains is largely flexible and appears to mask the exposure of putative fIXa enzyme binding loop (Tyr555-Asp569) region in the A2 domain. The simulation of fVIIIa, generated from the zymogen structure, predicted that the linker peptide (a1) undergoes significant conformational reorganization upon activation by relocating completely to the A1-domain. The conformational transition led to the exposure of the Tyr555-Asp569 loop and the surrounding region in the A2 domain. While the proposed linker peptide conformation is predictive in nature and warrants further experimental validation, the observed conformational differences between the zymogen and activated forms may explain and support the large body of experimental data that implicated the critical importance of the cleavage of the peptide bond between the Arg372 and Ser373 residues for the full co-factor activity of fVIII.
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Walter ED, Stevens DJ, Spevacek AR, Visconte MP, Dei Rossi A, Millhauser GL. Copper binding extrinsic to the octarepeat region in the prion protein. Curr Protein Pept Sci 2010; 10:529-35. [PMID: 19538144 DOI: 10.2174/138920309789352056] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Accepted: 03/12/2009] [Indexed: 11/22/2022]
Abstract
Current research suggests that the function of the prion protein (PrP) is linked to its ability to bind copper. PrP is implicated in copper regulation, copper buffering and copper-dependent signaling. Moreover, in the development of prion disease, copper may modulate the rate of protein misfolding. PrP possesses a number of copper sites, each with distinct chemical characteristics. Most studies thus far have concentrated on elucidating chemical features of the octarepeat region (residues 60-91, hamster sequence), which can take up to four equivalents of copper, depending on the ratio of Cu2+ to protein. However, other sites have been proposed, including those at histidines 96 and 111, which are adjacent to the octarepeats, and also at histidines within PrP's folded C-terminal domain. Here, we review the literature of these copper sites extrinsic to the octarepeat region and add new findings and insights from recent experiments.
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Affiliation(s)
- Eric D Walter
- Department of Chemistry & Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA.
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40
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Gralka E, Valensin D, Gajda K, Bacco D, Szyrwiel L, Remelli M, Valensin G, Kamasz W, Baranska-Rybak W, Kozłowski H. Copper(II) coordination outside the tandem repeat region of an unstructured domain of chicken prion protein. MOLECULAR BIOSYSTEMS 2009; 5:497-510. [PMID: 19381364 DOI: 10.1039/b820635j] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combined potentiometric, calorimetric and spectroscopic methods were used to investigate the Cu(2+) binding ability and coordination behaviour of some peptide fragments related to the neurotoxic region of chicken Prion Protein. The systems studied were the following protein fragments: chPrP(106-114), chPrP(119-126), chPrP(108-127), chPrP(105-127) and chPrP(105-133).The complex formation always starts around pH 4 with the coordination of an imidazole nitrogen, followed by the deprotonation and binding of amide nitrogens from the peptidic backbone. At neutral pH, the {N(im), 3N(-)} binding mode is the preferred one. The amide nitrogens participating in the binding to the Cu(2+) ion derive from residues from the N-terminus side, with the formation of a six-membered chelate ring with the imidazolic side chain.Comparison of thermodynamic data for the two histydyl binding domains (around His-110 and His-124), clearly indicates that the closest to the hexarepeat domain (His-110) has the highest ability to bind Cu(2+) ions, although both of them have the same coordination mode. Conversely, in the case of the human neurotoxic peptide region, between the two binding sites, located at His-96 and His-111, the farthest from the tandem repeat region is the strongest one. Finally, thermodynamic data show that chicken peptide is a distinctly better ligand for coordination of copper ions with respect to the human fragment.
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Affiliation(s)
- Ewa Gralka
- Faculty of Chemistry, University of Wroclaw, F. Joliot-Curie 14, 50-383 Wroclaw, Poland
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Brasuń J, Matera-Witkiewicz A, Ołdziej S, Pratesi A, Ginanneschi M, Messori L. Impact of ring size on the copper(II) coordination abilities of cyclic tetrapeptides. J Inorg Biochem 2009; 103:813-7. [PMID: 19329186 DOI: 10.1016/j.jinorgbio.2009.02.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2008] [Revised: 02/10/2009] [Accepted: 02/12/2009] [Indexed: 11/28/2022]
Abstract
A new, 14-membered, tetraza cyclic tetrapeptide containing histidine and lysine side-chains, c(beta(3)homoLysdHisbeta-AlaHis), was designed, synthesized and characterized; its copper(II) binding properties were investigated in dependence of pH by potentiometric and spectroscopic methods. In line with previous studies of similar systems, the progressive involvement of amide nitrogens in copper(II) coordination was evidenced for pH values greater than 6. At physiological pH the dominant species consists of a copper(II) center coordinated by two amide nitrogens, an imidazole nitrogen and a water molecule. In contrast, at pH values higher than 8.7, a copper(II) coordination environment consisting of four amide nitrogens in the equatorial plane and the axial imidazole ligands is formed as clearly indicated by spectroscopic data and theoretical calculations. The behavior of this 14-membered cyclic tetrapeptide is compared to that of its 12-membered cyclic analog, particular attention being paid to the effects of ring size on the respective copper(II) binding abilities.
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Affiliation(s)
- Justyna Brasuń
- Department of Inorganic Chemistry, Wrocław Medical University, Poland.
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Valensin G, Molteni E, Valensin D, Taraszkiewicz M, Kozlowski H. Molecular Dynamics Study of the Cu2+ Binding-Induced “Structuring” of the N-Terminal Domain of Human Prion Protein. J Phys Chem B 2009; 113:3277-9. [DOI: 10.1021/jp901030a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gianni Valensin
- Department of Chemistry, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy, and Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Elena Molteni
- Department of Chemistry, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy, and Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Daniela Valensin
- Department of Chemistry, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy, and Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Magdalena Taraszkiewicz
- Department of Chemistry, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy, and Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Henryk Kozlowski
- Department of Chemistry, University of Siena, Via Aldo Moro 2, 53100 Siena, Italy, and Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
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Brown DR. Brain proteins that mind metals: a neurodegenerative perspective. Dalton Trans 2009:4069-76. [DOI: 10.1039/b822135a] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Remelli M, Valensin D, Bacco D, Gralka E, Guerrini R, Migliorini C, Kozlowski H. The complex-formation behaviour of His residues in the fifth Cu2+ binding site of human prion protein: a close look. NEW J CHEM 2009. [DOI: 10.1039/b9nj00202b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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