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Duan H, Yin L, Chen T, Qi D, Zhang D. A “metal ions-induced poisoning behavior of biomolecules” inspired polymeric probe for Cu2+ selective detection on basis of coil to helix conformation transition. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Lupaescu AV, Humelnicu I, Petre BA, Ciobanu CI, Drochioiu G. Direct evidence for binding of aluminum to NAP anti-amyloid peptide and its analogs. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2020; 26:106-116. [PMID: 31550911 DOI: 10.1177/1469066719877714] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
NAP (NAPVSIPQ) is a small peptide derived from the activity-dependent neuroprotective protein (ADNP), which provides neuroprotection against amyloid-β peptide toxicity associated with Alzheimer disease. Several metal ions are able to promote the formation of amyloid-β peptide oligomers and protofibrils in human brain tissue. Although the relationship between metal ions and amyloid-β peptide peptides is extensively investigated, that with the NAP peptide is less understood. Nevertheless, our previous research revealed unexpected iron binding to NAP peptide and its analogs. However, a link between aluminum ions, Alzheimer disease and amyloid-β peptide or NAP peptides still remains controversial. Therefore, we have investigated the possible binding of aluminum ions to NAP peptide and its four analogs. Indeed, MALDI-ToF mass spectrometry (MS), including MS/MS study, and Fourier transform infrared (FT-IR) spectroscopy revealed an unexpected pattern of aluminum ion binding to both NAP peptide and its analogs. Our results have been discussed with respect to NAP protection against Alzheimer disease-related neurotoxicity.
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Affiliation(s)
| | - Ionel Humelnicu
- Faculty of Chemistry, Al. I. Cuza University of Iasi, Iasi, Romania
| | - Brindusa Alina Petre
- Faculty of Chemistry, Al. I. Cuza University of Iasi, Iasi, Romania
- Center for Fundamental Research and Experimental Development in Translation Medicine - TRANSCEND, Regional Institute of Oncology, Iasi, Romania
| | | | - Gabi Drochioiu
- Faculty of Chemistry, Al. I. Cuza University of Iasi, Iasi, Romania
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Zhang Q, Zhang F, Ni Y, Kokot S. Effects of aluminum on amyloid-beta aggregation in the context of Alzheimer’s disease. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2015.06.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Braidy N, Poljak A, Marjo C, Rutlidge H, Rich A, Jayasena T, Inestrosa NC, Sachdev P. Metal and complementary molecular bioimaging in Alzheimer's disease. Front Aging Neurosci 2014; 6:138. [PMID: 25076902 PMCID: PMC4098123 DOI: 10.3389/fnagi.2014.00138] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 06/09/2014] [Indexed: 12/30/2022] Open
Abstract
Alzheimer's disease (AD) is the leading cause of dementia in the elderly, affecting over 27 million people worldwide. AD represents a complex neurological disorder which is best understood as the consequence of a number of interconnected genetic and lifestyle variables, which culminate in multiple changes to brain structure and function. These can be observed on a gross anatomical level in brain atrophy, microscopically in extracellular amyloid plaque and neurofibrillary tangle formation, and at a functional level as alterations of metabolic activity. At a molecular level, metal dyshomeostasis is frequently observed in AD due to anomalous binding of metals such as Iron (Fe), Copper (Cu), and Zinc (Zn), or impaired regulation of redox-active metals which can induce the formation of cytotoxic reactive oxygen species and neuronal damage. Metal chelators have been administered therapeutically in transgenic mice models for AD and in clinical human AD studies, with positive outcomes. As a result, neuroimaging of metals in a variety of intact brain cells and tissues is emerging as an important tool for increasing our understanding of the role of metal dysregulation in AD. Several imaging techniques have been used to study the cerebral metallo-architecture in biological specimens to obtain spatially resolved data on chemical elements present in a sample. Hyperspectral techniques, such as particle-induced X-ray emission (PIXE), energy dispersive X-ray spectroscopy (EDS), X-ray fluorescence microscopy (XFM), synchrotron X-ray fluorescence (SXRF), secondary ion mass spectrometry (SIMS), and laser ablation inductively coupled mass spectrometry (LA-ICPMS) can reveal relative intensities and even semi-quantitative concentrations of a large set of elements with differing spatial resolution and detection sensitivities. Other mass spectrometric and spectroscopy imaging techniques such as laser ablation electrospray ionization mass spectrometry (LA ESI-MS), MALDI imaging mass spectrometry (MALDI-IMS), and Fourier transform infrared spectroscopy (FTIR) can be used to correlate changes in elemental distribution with the underlying pathology in AD brain specimens. Taken together, these techniques provide new techniques to probe the pathobiology of AD and pave the way for identifying new therapeutic targets. The current review aims to discuss the advantages and challenges of using these emerging elemental and molecular imaging techniques, and highlight clinical achievements in AD research using bioimaging techniques.
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Affiliation(s)
- Nady Braidy
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia
| | - Anne Poljak
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia ; Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia ; Faculty of Medicine, School of Medical Sciences, University of New South Wales Sydney, NSW, Australia
| | - Christopher Marjo
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Helen Rutlidge
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Anne Rich
- Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales Sydney, NSW, Australia
| | - Tharusha Jayasena
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia
| | - Nibaldo C Inestrosa
- Faculty of Biological Sciences, Centre for Ageing and Regeneration, P. Catholic University of Chile Santiago, Chile
| | - Perminder Sachdev
- Faculty of Medicine, Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales Sydney, NSW, Australia ; Euroa Centre, Neuropsychiatric Institute, Prince of Wales Hospital Sydney, NSW, Australia
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Di Natale G, Ősz K, Kállay C, Pappalardo G, Sanna D, Impellizzeri G, Sóvágó I, Rizzarelli E. Affinity, speciation, and molecular features of copper(II) complexes with a prion tetraoctarepeat domain in aqueous solution: insights into old and new results. Chemistry 2013; 19:3751-61. [PMID: 23355367 DOI: 10.1002/chem.201202912] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 11/29/2012] [Indexed: 11/08/2022]
Abstract
Characterization of the copper(II) complexes formed with the tetraoctarepeat peptide at low and high metal-to-ligand ratios and in a large pH range, would provide a breakthrough in the interpretation of biological relevance of the different metal complexes of copper(II)-tetraoctarepeat system. In the present work, the potentiometric, UV/Vis, circular dichroism (CD), and electron paramagnetic resonance (EPR) studies were carried out on copper(II) complexes with a PEG-ylated derivative of the tetraoctarepeats peptide sequence (Ac-PEG27 -(PHGGGWGQ)4 -NH2 ) and the peptide Ac-(PHGGGWGQ)2 -NH2 . Conjugation of tetraoctarepeat peptide sequence with polyethyleneglycol improved the solubility of the copper(II) complexes. The results enable a straightforward explanation of the conflicting results originated from the underestimation of all metal-ligand equilibria and the ensuing speciation. A complete and reliable speciation is therefore obtained with the released affinity and binding details of the main complexes species formed in aqueous solution. The results contribute to clarify the discrepancies of several studies in which the authors ascribe the redox activity of copper(II)-tetraoctarepeat system considering only the average effects of several coexisting species with very different stoichiometries and binding modes.
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Affiliation(s)
- Giuseppe Di Natale
- CNR Institute of Biostructures and Bioimaging, V.le A. Doria 6, 95125 Catania, Italy
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Abstract
In this chapter we provided the overall background to the subject of protein aggregation and fibrillogenesis in amyloidogenesis, with introduction and brief discussion of the various topics that are included with the coming chapters. The division of the book into basic science and clinical science sections enables correlation of the topics to be made. The many proteins and peptides that have currently been found to undergo fibrillogenesis are tabulated. A broad technical survey is made, to indicate the vast array of techniques currently available to study aspects of protein oligomerization, aggregation and fibrillogenesis. These are split into three groups and tabulated, as the microscopical techniques, the analytical and biophysical methods, and the biochemical and cellular techniques. A few techniques are discussed, but in most cases only a link to relevant recent literature is provided.
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Thakur AK, Srivastava AK, Srinivas V, Chary KVR, Rao CM. Copper alters aggregation behavior of prion protein and induces novel interactions between its N- and C-terminal regions. J Biol Chem 2011; 286:38533-38545. [PMID: 21900252 DOI: 10.1074/jbc.m111.265645] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Copper is reported to promote and prevent aggregation of prion protein. Conformational and functional consequences of Cu(2+)-binding to prion protein (PrP) are not well understood largely because most of the Cu(2+)-binding studies have been performed on fragments and truncated variants of the prion protein. In this context, we set out to investigate the conformational consequences of Cu(2+)-binding to full-length prion protein (PrP) by isothermal calorimetry, NMR, and small angle x-ray scattering. In this study, we report altered aggregation behavior of full-length PrP upon binding to Cu(2+). At physiological temperature, Cu(2+) did not promote aggregation suggesting that Cu(2+) may not play a role in the aggregation of PrP at physiological temperature (37 °C). However, Cu(2+)-bound PrP aggregated at lower temperatures. This temperature-dependent process is reversible. Our results show two novel intra-protein interactions upon Cu(2+)-binding. The N-terminal region (residues 90-120 that contain the site His-96/His-111) becomes proximal to helix-1 (residues 144-147) and its nearby loop region (residues 139-143), which may be important in preventing amyloid fibril formation in the presence of Cu(2+). In addition, we observed another novel interaction between the N-terminal region comprising the octapeptide repeats (residues 60-91) and helix-2 (residues 174-185) of PrP. Small angle x-ray scattering studies of full-length PrP show significant compactness upon Cu(2+)-binding. Our results demonstrate novel long range inter-domain interactions of the N- and C-terminal regions of PrP upon Cu(2+)-binding, which might have physiological significance.
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Affiliation(s)
- Abhay Kumar Thakur
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Uppal Road, Hyderabad 500 007, India
| | - Atul Kumar Srivastava
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - Volety Srinivas
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Uppal Road, Hyderabad 500 007, India
| | - Kandala Venkata Ramana Chary
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005, India
| | - Chintalagiri Mohan Rao
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Uppal Road, Hyderabad 500 007, India.
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Kawahara M, Koyama H, Nagata T, Sadakane Y. Zinc, copper, and carnosine attenuate neurotoxicity of prion fragment PrP106-126. Metallomics 2011; 3:726-34. [PMID: 21442127 DOI: 10.1039/c1mt00015b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Prion diseases are progressive neurodegenerative diseases that are associated with the conversion of normal cellular prion protein (PrP(C)) to abnormal pathogenic prion protein (PrP(SC)) by conformational changes. Prion protein is a metal-binding protein that is suggested to be involved in metal homeostasis. We investigated here the effects of trace elements on the conformational changes and neurotoxicity of synthetic prion peptide (PrP106-126). PrP106-126 exhibited the formation of β-sheet structures and enhanced neurotoxicity during the aging process. The co-existence of Zn(2+) or Cu(2+) during aging inhibited β-sheet formation by PrP106-126 and attenuated its neurotoxicity on primary cultured rat hippocampal neurons. Although PrP106-126 formed amyloid-like fibrils as observed by atomic force microscopy, the height of the fibers was decreased in the presence of Zn(2+) or Cu(2+). Carnosine (β-alanyl histidine) significantly inhibited both the β-sheet formation and the neurotoxicity of PrP106-126. Our results suggested that Zn(2+) and Cu(2+) might be involved in the pathogenesis of prion diseases. It is also possible that carnosine might become a candidate for therapeutic treatments for prion diseases.
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Affiliation(s)
- Masahiro Kawahara
- Department of Analytical Chemistry, School of Pharmaceutical Sciences Kyushu University of Health and Welfare, 1714-1 Yoshino-cho, Nobeoka-shi, Miyazaki. Japan.
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Rivillas-Acevedo L, Grande-Aztatzi R, Lomelí I, García JE, Barrios E, Teloxa S, Vela A, Quintanar L. Spectroscopic and Electronic Structure Studies of Copper(II) Binding to His111 in the Human Prion Protein Fragment 106−115: Evaluating the Role of Protons and Methionine Residues. Inorg Chem 2011; 50:1956-72. [DOI: 10.1021/ic102381j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lina Rivillas-Acevedo
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Rafael Grande-Aztatzi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Italia Lomelí
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Javier E. García
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Erika Barrios
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Sarai Teloxa
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Alberto Vela
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
| | - Liliana Quintanar
- Departamento de Química, Centro de Investigación y de Estudios Avanzados (Cinvestav), 07360, D.F., Mexico
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Abstract
The prion protein is well known because of its association with prion diseases. These diseases, which include variant CJD, are unusual because they are neurodegenerative diseases that can be transferred between individuals experimentally. The prion protein is also widely known as a copper binding protein. The binding of copper to the prion protein is possibly necessary for its normal cellular function. The prion protein has also been suggested to bind other metals, and among these, manganese. Despite over ten years of research on manganese and prion disease, this interaction has often been dismissed or at best seen as a poor cousin to the involvement of copper. However, recent data has shown that manganese could stabilise prions in the environment and that chelation therapy specifically aimed at manganese can extend the life of animals with prion disease. This article reviews the evidence for a link between prions and manganese.
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Affiliation(s)
- David R Brown
- Department of Biology and Biochemistry, University of Bath, Bath, UKBA2 7AY.
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Suhre MH, Hess S, Golser AV, Scheibel T. Influence of divalent copper, manganese and zinc ions on fibril nucleation and elongation of the amyloid-like yeast prion determinant Sup35p-NM. J Inorg Biochem 2009; 103:1711-20. [DOI: 10.1016/j.jinorgbio.2009.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 09/22/2009] [Accepted: 09/23/2009] [Indexed: 01/28/2023]
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Metal ion physiopathology in neurodegenerative disorders. Neuromolecular Med 2009; 11:223-38. [PMID: 19946766 DOI: 10.1007/s12017-009-8102-1] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 10/14/2009] [Indexed: 12/14/2022]
Abstract
Metal dyshomeostasis in the brain (BMD) has often been proposed as a possible cause for several neurodegenerative disorders (NDs). Nevertheless, the precise nature of the biochemical mechanisms of metal involvement in NDs is still largely unknown. Mounting evidence suggests that normal aging itself is characterized by, among other features, a significant degree of metal ion dysmetabolism in the brain. This is probably the result of a progressive deterioration of the metal regulatory systems and, at least in some cases, of life-long metal exposure and brain accumulation. Although alterations of metal metabolism do occur to some extent in normal aging, they appear to be highly enhanced under various neuropathological conditions, causing increased oxidative stress and favoring abnormal metal-protein interactions. Intriguingly, despite the fact that most common NDs have a distinct etiological basis, they share striking similarities as they are all characterized by a documented brain metal impairment. This review will primarily focus on the alterations of metal homeostasis that are observed in normal aging and in Alzheimer's disease. We also present a brief survey on BMD in other NDs (Amyotrophic Lateral Sclerosis, Parkinson's, and Prion Protein disease) in order to highlight what represents the most reliable evidence supporting a crucial involvement of metals in neurodegeneration. The opportunities for metal-targeted pharmacological strategies in the major NDs are briefly outlined as well.
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Phosphorylation of prion protein at serine 43 induces prion protein conformational change. J Neurosci 2009; 29:8743-51. [PMID: 19587281 DOI: 10.1523/jneurosci.2294-09.2009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The cause of the conformational change of normal cellular prion protein (PrP) into its disease-associated form is unknown. Posttranslational modifications, such as glycosylation, acetylation, S-nitrosylation, and phosphorylation, are known to induce protein conformational changes. Here, we investigated whether phosphorylation could induce the conformational change of PrP because PrP contains several kinase motifs and has been found recently in the cytosol, in which kinases generally reside. Neuronal cyclin-dependent kinase 5 (Cdk5) phosphorylated recombinant PrP(23-231) at serine 43 (S43) in an in vitro kinase assay. Cdk5-phosphorylated PrP became proteinase K resistant, formed Congo Red-positive fibrils, and formed aggregates that were immunostained with anti-PrP and anti-phospho-PrP(S43) (anti-pPrP(S43)). pPrP(S43) was detected in PrP/Cdk5/p25 cotransfected N2a cells. Roscovitine inhibition of Cdk5 activity or transfection of N2a cells with mutant PrP S43A eliminated the anti-pPrP(S43)-immunopositive protein. Alkaline phosphatase-sensitive and proteinase K-resistant pPrP(S43) immunoreactivity was observed in scrapie-infected but not control-injected mice brains. These results raise the possibility that phosphorylation could represent a physiological mechanism of PrP conversion in vivo.
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Stawoska I, Wesełucha-Birczyńska A, Regonesi ME, Riva M, Tortora P, Stochel G. Interaction of selected divalent metal ions with human ataxin-3 Q36. J Biol Inorg Chem 2009; 14:1175-85. [DOI: 10.1007/s00775-009-0561-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Accepted: 06/18/2009] [Indexed: 11/24/2022]
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Greer AM, Huang Z, Oriakhi A, Lu Y, Lou J, Matthews KS, Bondos SE. The Drosophila Transcription Factor Ultrabithorax Self-Assembles into Protein-Based Biomaterials with Multiple Morphologies. Biomacromolecules 2009; 10:829-37. [DOI: 10.1021/bm801315v] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Alexandra M. Greer
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Zhao Huang
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Ashley Oriakhi
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Yang Lu
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Jun Lou
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Kathleen S. Matthews
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
| | - Sarah E. Bondos
- Departments of Biochemistry and Cell Biology and Mechanical Engineering and Materials Science, Rice University, 6100 South Main Street, Houston, Texas 77005, and Department of Molecular and Cellular Medicine, Texas A&M Health Science Center, 440 Reynolds Medical Building, College Station, Texas 77843-1114
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Palladino P, Ronga L, Benedetti E, Rossi F, Ragone R. Peptide Fragment Approach to Prion Misfolding: The Alpha-2 Domain. Int J Pept Res Ther 2009. [DOI: 10.1007/s10989-009-9171-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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18
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Trevino SR, Scholtz J, Pace C. Measuring and Increasing Protein Solubility. J Pharm Sci 2008; 97:4155-66. [DOI: 10.1002/jps.21327] [Citation(s) in RCA: 106] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Fernandes AT, Martins LO, Melo EP. The hyperthermophilic nature of the metallo-oxidase from Aquifex aeolicus. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2008; 1794:75-83. [PMID: 18930169 DOI: 10.1016/j.bbapap.2008.09.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 08/22/2008] [Accepted: 09/11/2008] [Indexed: 10/21/2022]
Abstract
The stability of the Aquifex aeolicus multicopper oxidase (McoA) was studied by spectroscopy, calorimetry and chromatography to understand its thermophilic nature. The enzyme is hyperthermostable as deconvolution of the differential scanning calorimetry trace shows that thermal unfolding is characterized by temperature values at the mid-point of 105, 110 and 114 degrees C. Chemical denaturation revealed however a very low stability at room temperature (2.8 kcal/mol) because copper bleaching/depletion occur before the unfolding of the tertiary structure and McoA is highly prone to aggregate. Indeed, unfolding kinetics measured with the stopped-flow technique quantified the stabilizing effect of copper on McoA (1.5 kcal/mol) and revealed quite an uncommon observation further confirmed by light scattering and gel filtration chromatography: McoA aggregates in the presence of guanidinium hydrochloride, i.e., under unfolding conditions. The aggregation process results from the accumulation of a quasi-native state of McoA that binds to ANS and is the main determinant of the stability curve of McoA. Kinetic partitioning between aggregation and unfolding leads to a very low heat capacity change and determines a flat dependence of stability on temperature.
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Affiliation(s)
- André T Fernandes
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2781-901 Oeiras, Portugal
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Natalello A, Prokorov VV, Tagliavini F, Morbin M, Forloni G, Beeg M, Manzoni C, Colombo L, Gobbi M, Salmona M, Doglia SM. Conformational Plasticity of the Gerstmann–Sträussler–Scheinker Disease Peptide as Indicated by Its Multiple Aggregation Pathways. J Mol Biol 2008; 381:1349-61. [DOI: 10.1016/j.jmb.2008.06.063] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Revised: 06/17/2008] [Accepted: 06/21/2008] [Indexed: 10/21/2022]
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21
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Bolognin S, Zatta P, Drago D, Parnigotto PP, Ricchelli F, Tognon G. Mutual Stimulation of Beta-Amyloid Fibrillogenesis by Clioquinol and Divalent Metals. Neuromolecular Med 2008; 10:322-32. [DOI: 10.1007/s12017-008-8046-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2008] [Accepted: 07/30/2008] [Indexed: 01/06/2023]
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22
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Broomell CC, Chase SF, Laue T, Waite JH. Cutting Edge Structural Protein from the Jaws of Nereis virens. Biomacromolecules 2008; 9:1669-77. [DOI: 10.1021/bm800200a] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chris C. Broomell
- University of California at Santa Barbara, Santa Barbara, California 93106, and Center to Advance Molecular Interaction Science, University of New Hampshire, Durham, New Hampshire 03824
| | - Sue F. Chase
- University of California at Santa Barbara, Santa Barbara, California 93106, and Center to Advance Molecular Interaction Science, University of New Hampshire, Durham, New Hampshire 03824
| | - Tom Laue
- University of California at Santa Barbara, Santa Barbara, California 93106, and Center to Advance Molecular Interaction Science, University of New Hampshire, Durham, New Hampshire 03824
| | - J. Herbert Waite
- University of California at Santa Barbara, Santa Barbara, California 93106, and Center to Advance Molecular Interaction Science, University of New Hampshire, Durham, New Hampshire 03824
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23
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The chemistry of copper binding to PrP: is there sufficient evidence to elucidate a role for copper in protein function? Biochem J 2008; 410:237-44. [DOI: 10.1042/bj20071477] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
There has been an enormous body of literature published in the last 10 years concerning copper and PrP (prion protein). Despite this, there is still no generally accepted role for copper in the function of PrP or any real consensus as to how and to what affinity copper associates with the protein. The present review attempts to look at all the evidence for the chemistry, co-ordination and affinity of copper binding to PrP, and then looks at what effect this has on the protein. We then connect this evidence with possible roles for PrP when bound to copper. No clear conclusions can be made from the available data, but it is clear from the present review what aspects of copper association with PrP need to be re-investigated.
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Potential pathogenic role of β-amyloid1–42–aluminum complex in Alzheimer's disease. Int J Biochem Cell Biol 2008; 40:731-46. [DOI: 10.1016/j.biocel.2007.10.014] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 10/09/2007] [Accepted: 10/09/2007] [Indexed: 11/20/2022]
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Boshuizen RS, Morbin M, Mazzoleni G, Tagliavini F, Meloen RH, Langedijk JPM. Polyanion induced fibril growth enables the development of a reproducible assay in solution for the screening of fibril interfering compounds, and the investigation of the prion nucleation site. Amyloid 2007; 14:205-19. [PMID: 17701468 DOI: 10.1080/13506120701464628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The misfolded conformer of the prion protein (PrP) that aggregates into fibrils is believed to be the pathogenic agent in transmissible spongiform encephalopathies. In order to find fibril interfering compounds a screening assay in solution would be the preferred format to approximate more closely to physical conditions and enable the performance of kinetic studies. However, such an assay is hampered by the high irreproducibility because of the stochastic nature of the fibril formation process. According to published fibril models, the fibrillar core may be composed of stacked parallel beta-strands. In these models positive charge repulsion may reduce the chance of favorable stacking and cause the irreproducibility in the fibril formation. This study shows that the charge compensation by polyanions induced a very strong fibril growth which made it possible to develop a highly reproducible fibril interference assay. The stimulating effect of the polyanions depended on the presence of the basic residues Lys(106), Lys(110) and His(111). The assay was validated by comparison of the 50% fibril inhibition levels of peptide huPrP106-126 by six tetracyclic compounds. With this new assay, the fibrillogenic core (GAAAAGAVVG) of peptide huPrP106-126 was determined and for the first time it was possible to test the inhibition potentials of peptide analogues. Also it was found that variants of peptide huPrP106-126 with proline substitutions at positions Ala(115), Ala(120), or Val(122) inhibited the fibril formation of huPrP106-126.
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Yu S, Yin S, Li C, Wong P, Chang B, Xiao F, Kang SC, Yan H, Xiao G, Tien P, Sy MS. Aggregation of prion protein with insertion mutations is proportional to the number of inserts. Biochem J 2007; 403:343-51. [PMID: 17187581 PMCID: PMC1874237 DOI: 10.1042/bj20061592] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mutation in the prion gene, PRNP, accounts for approx. 10-15% of human prion diseases. However, little is known about the mechanisms by which a mutant prion protein (PrP) causes disease. We compared the biochemical properties of a wild-type human prion protein, rPrP(C) (recombinant wild-type PrP), which has five octapeptide-repeats, with two recombinant human prion proteins with insertion mutations, one with three more octapeptide repeats, rPrP(8OR), and the other with five more octapeptide repeats, rPrP(10OR). We found that the insertion mutant proteins are more prone to aggregate, and the degree and kinetics of aggregation are proportional to the number of inserts. The octapeptide-repeat and alpha-helix 1 regions are important in aggregate formation, because aggregation is inhibited with monoclonal antibodies that are specific for epitopes in these regions. We also showed that a small amount of mutant protein could enhance the formation of mixed aggregates that are composed of mutant protein and wild-type rPrP(C). Accordingly, rPrP(10OR) is also more efficient in promoting the aggregation of rPrP(C) than rPrP(8OR). These findings provide a biochemical explanation for the clinical observations that the severity of the disease in patients with insertion mutations is proportional to the number of inserts, and thus have implications for the pathogenesis of inherited human prion disease.
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Affiliation(s)
- Shuiliang Yu
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Shaoman Yin
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Chaoyang Li
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Poki Wong
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Binggong Chang
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Fan Xiao
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Shin-Chung Kang
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
| | - Huimin Yan
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
- †Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Gengfu Xiao
- †Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
| | - Po Tien
- †Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, Hubei 430072, People's Republic of China
- ‡Institute of Microbiology, Chinese Academy of Science, Beijing 100080, People's Republic of China
| | - Man-Sun Sy
- *Department of Pathology, School of Medicine, Case Western Reserve University, 10900 Euclid Ave., Cleveland, OH 44120, U.S.A
- To whom correspondence should be addressed (email )
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Ricchelli F, Fusi P, Tortora P, Valtorta M, Riva M, Tognon G, Chieregato K, Bolognin S, Zatta P. Destabilization of non-pathological variants of ataxin-3 by metal ions results in aggregation/fibrillogenesis. Int J Biochem Cell Biol 2007; 39:966-77. [PMID: 17300980 DOI: 10.1016/j.biocel.2007.01.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 01/10/2007] [Indexed: 10/23/2022]
Abstract
Ataxin-3 (AT3), a protein that causes spinocerebellar ataxia type 3, has a C-terminus containing a polyglutamine stretch, the length of which can be expanded in its pathological variants. Here, we report on the role of Cu(2+), Mn(2+), Zn(2+) and Al(3+) in the induction of defective protein structures and subsequent aggregation/fibrillogenesis of three different non-pathological forms of AT3, i.e. murine (Q6), human non-expanded (Q26) and human moderately expanded (Q36). AT3 variants showed an intrinsic propensity to misfolding/aggregation; on the other hand, Zn(2+) and Al(3+) strongly stimulated the amplitude and kinetics of these conformational conversions. While both metal ions induced a time-dependent aggregation into amyloid-like fibrillar forms, only small oligomers and/or short protofibrillar species were detected for AT3s alone. The rate and extent of the metal-induced aggregation/fibrillogenesis processes increased with the size of the polyglutamine stretch. Mn(2+) and Cu(2+) had no effect on (Q6) or actually prevented (Q26 and Q36) the AT3 structural transitions. The observation that Zn(2+) and Al(3+) promote AT3 fibrillogenesis is consistent with similar results found for other amyloidogenic molecules, such as beta-amyloid and prion proteins. Plausibly, these metal ions are a major common factor/cofactor in the etiopathogenesis of neurodegenerative diseases. Studies of liposomes as membrane models showed dramatic changes in the structural properties of the lipid bilayer in the presence of AT3, which were enhanced after supplementing the protein with Zn(2+) and Al(3+). This suggests that cell membranes could be a potential primary target in the ataxin-3 pathogenesis and metals could be a biological factor capable of modulating their interaction with AT3.
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Affiliation(s)
- Fernanda Ricchelli
- C.N.R. Institute of Biomedical Technologies, Metalloproteins Unit, at the Department of Biology, University of Padova, Viale G. Colombo 3-35121 Padova, Italy.
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Liu LL, Franz KJ. Phosphorylation-dependent metal binding by alpha-synuclein peptide fragments. J Biol Inorg Chem 2006; 12:234-47. [PMID: 17082919 DOI: 10.1007/s00775-006-0181-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2006] [Accepted: 10/04/2006] [Indexed: 10/24/2022]
Abstract
Alpha-synuclein (alpha-syn) is the major protein component of the insoluble fibrils that make up Lewy bodies, the hallmark lesions of Parkinson's disease. Its C-terminal region contains motifs of charged amino acids that potentially bind metal ions, as well as several identified phosphorylation sites. We have investigated the metal-binding properties of synthetic model peptides and phosphopeptides that correspond to residues 119-132 of the C-terminal, polyacidic stretch of human alpha-syn, with the sequence Ac-Asp-Pro-Asp-Asn-Glu-Ala-Tyr-Glu-Met-Pro-Ser-Glu-Glu-Gly (alpha-syn119-132). The peptide pY125 replaces tyrosine with phosphotyrosine, whereas pS129 replaces serine with phosphoserine. By using Tb(3+) as a luminescent probe of metal binding, we find a marked selectivity of pY125 for Tb(3+) compared with pS129 and alpha-syn119-132, a result confirmed by isothermal titration calorimetry. Truncated or alanine-substituted peptides show that the phosphoester group on tyrosine provides a metal-binding anchor that is supplemented by carboxylic acid groups at positions 119, 121, and 126 to establish a multidentate ligand, while two glutamic acid residues at positions 130 and 131 contribute to binding additional Tb(3+) ions. The interaction of other metal ions was investigated by electrospray ionization mass spectrometry, which confirmed that pY125 is selective for trivalent metal ions over divalent metal ions, and revealed that Fe(3+) and Al(3+) induce peptide dimerization through metal ion cross-links. Circular dichroism showed that Fe(3+) can induce a partially folded structure for pY125, whereas no change was observed for pS129 or the unphosphorylated analog. The results of this study show that the type and location of a phosphorylated amino acid influence a peptide's metal-binding specificity and affinity as well as its overall conformation.
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Affiliation(s)
- Lucy L Liu
- Department of Chemistry, Duke University, P.O. Box 90346, Durham, NC 27708, USA
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