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Behzadi M, Eghtedardoost M, Bagheri M. Endocytosis Involved d-Oligopeptide of Tryptophan and Arginine Displays Ordered Nanostructures and Cancer Cell Stereoselective Toxicity by Autophagy. ACS APPLIED MATERIALS & INTERFACES 2022; 14:14928-14943. [PMID: 35319877 DOI: 10.1021/acsami.1c23846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Owing to their self-aggregation propensity and selective interaction with the anionic membranes, the peptides rich in tryptophan (Trp) and arginine (Arg) are considered for the development of novel anticancer therapeutics. However, the structural insights from the perspective of backbone chirality and spatial orientation of side chains into the selective toxicity of peptides are limited. Here, we investigated the selectivity and cellular uptake of HHC36, a Trp/Arg-rich nonapeptide, and its d-enantiomer (allDHHC36) and a retroinverso analogue in the lung A549 and breast MDA-MB-231 cancer cells. We realized that the d-peptides can specifically induce autophagy at nontoxic concentrations only in the A549 cells supported from the LC 3-II immunostaining expression in the vicinity of the nucleus and the ultrastructural analysis revealing the autophagosome formation. The autophagic flux was also remarkable in the cells exposed to d-peptides at a far lower concentration in synergism with doxorubicin (DOX). In marked contrast, nonselective cell death was observed only if a high amount of HHC36 was applied. HHC36 tended to irregular collagen-like fibrils relative to allDHHC36 that distinctly formed higher-order coiled nanostructures. Interestingly, the short d-peptide fragments were generated in a harsh oxidative condition. Compared with the direct membrane transduction of HHC36, the entry of d-peptides into the lung cancer cells was controlled by endocytosis through the contribution of heparan sulfate proteoglycans (HSPGs) and cholesterol (CHO). However, both l- and d-peptides feasibly crossed the membrane and localized inside the S-phase-arrested cell nucleus. This suggested the likelihood of peptide intercalation with DNA that might differently appear in selective and/or nonselective deaths. These results unraveled the d-handedness-selective toxicity of a self-assembling Trp/Arg-rich sequence that is dependent on the cell type from the aspects of the density of anionic charges and CHO in the outer leaflet of the plasma membrane, as well as the intracellular redox imbalance that may drive the formation of toxic peptide nanostructure fragments.
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Affiliation(s)
- Malihe Behzadi
- Peptide Chemistry Laboratory, Institute of Biochemistry and Biophysics, University of Tehran, 16 Azar Street, 14176-14335 Tehran, Iran
| | - Marzieh Eghtedardoost
- Peptide Chemistry Laboratory, Institute of Biochemistry and Biophysics, University of Tehran, 16 Azar Street, 14176-14335 Tehran, Iran
| | - Mojtaba Bagheri
- Peptide Chemistry Laboratory, Institute of Biochemistry and Biophysics, University of Tehran, 16 Azar Street, 14176-14335 Tehran, Iran
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2
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Chiki A, Zhang Z, Rajasekhar K, Abriata LA, Rostami I, Krapp LF, Boudeffa D, Dal Peraro M, Lashuel HA. Investigating Crosstalk Among PTMs Provides Novel Insight Into the Structural Basis Underlying the Differential Effects of Nt17 PTMs on Mutant Httex1 Aggregation. Front Mol Biosci 2021; 8:686086. [PMID: 34381813 PMCID: PMC8352439 DOI: 10.3389/fmolb.2021.686086] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/06/2021] [Indexed: 01/24/2023] Open
Abstract
Post-translational modifications (PTMs) within the first 17 amino acids (Nt17) of the Huntingtin protein (Htt) have been shown to inhibit the aggregation and attenuate the toxicity of mutant Htt proteins in vitro and in various models of Huntington’s disease. Here, we expand on these studies by investigating the effect of methionine eight oxidation (oxM8) and its crosstalk with lysine 6 acetylation (AcK6) or threonine 3 phosphorylation (pT3) on the aggregation of mutant Httex1 (mHttex1). We show that M8 oxidation delays but does not inhibit the aggregation and has no effect on the final morphologies of mHttex1aggregates. The presence of both oxM8 and AcK6 resulted in dramatic inhibition of Httex1 fibrillization. Circular dichroism spectroscopy and molecular dynamics simulation studies show that PTMs that lower the mHttex1 aggregation rate (oxM8, AcK6/oxM8, pT3, pT3/oxM8, and pS13) result in increased population of a short N-terminal helix (first eight residues) in Nt17 or decreased abundance of other helical forms, including long helix and short C-terminal helix. PTMs that did not alter the aggregation rate (AcK6) of mHttex1 exhibit a similar distribution of helical conformation as the unmodified peptides. These results show that the relative abundance of N- vs. C-terminal helical conformations and long helices, rather than the overall helicity of Nt17, better explains the effect of different Nt17 PTMs on mHttex1; thus, explaining the lack of correlation between the effect of PTMs on the overall helicity of Nt17 and mHttex1 aggregation in vitro. Taken together, our results provide novel structural insight into the differential effects of single PTMs and crosstalk between different PTMs in regulating mHttex1 aggregation.
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Affiliation(s)
- Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Zhidian Zhang
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Laboratory for Biomolecular Modeling, School of Life Sciences, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Kolla Rajasekhar
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Luciano A Abriata
- Laboratory for Biomolecular Modeling, School of Life Sciences, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Iman Rostami
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.,Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen, Switzerland
| | - Lucien F Krapp
- Laboratory for Biomolecular Modeling, School of Life Sciences, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Driss Boudeffa
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Matteo Dal Peraro
- Laboratory for Biomolecular Modeling, School of Life Sciences, Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, School of Life Sciences, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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3
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Rezvani Boroujeni E, Hosseini SM, Fani G, Cecchi C, Chiti F. Soluble Prion Peptide 107-120 Protects Neuroblastoma SH-SY5Y Cells against Oligomers Associated with Alzheimer's Disease. Int J Mol Sci 2020; 21:E7273. [PMID: 33019683 PMCID: PMC7582777 DOI: 10.3390/ijms21197273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 12/20/2022] Open
Abstract
Alzheimer's disease (AD) is the most prevalent form of dementia and soluble amyloid β (Aβ) oligomers are thought to play a critical role in AD pathogenesis. Cellular prion protein (PrPC) is a high-affinity receptor for Aβ oligomers and mediates some of their toxic effects. The N-terminal region of PrPC can interact with Aβ, particularly the region encompassing residues 95-110. In this study, we identified a soluble and unstructured prion-derived peptide (PrP107-120) that is external to this region of the sequence and was found to successfully reduce the mitochondrial impairment, intracellular ROS generation and cytosolic Ca2+ uptake induced by oligomeric Aβ42 ADDLs in neuroblastoma SH-SY5Y cells. PrP107-120 was also found to rescue SH-SY5Y cells from Aβ42 ADDL internalization. The peptide did not change the structure and aggregation pathway of Aβ42 ADDLs, did not show co-localization with Aβ42 ADDLs in the cells and showed a partial colocalization with the endogenous cellular PrPC. As a sequence region that is not involved in Aβ binding but in PrP self-recognition, the peptide was suggested to protect against the toxicity of Aβ42 oligomers by interfering with cellular PrPC and/or activating a signaling that protected the cells. These results strongly suggest that PrP107-120 has therapeutic potential for AD.
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Affiliation(s)
- Elham Rezvani Boroujeni
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Science and Biotechnology, Shahid Beheshti University, Tehran 1983969411, Iran;
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale G.B Morgagni 50, 50134 Florence, Italy; (G.F.); (C.C.)
| | - Seyed Masoud Hosseini
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Science and Biotechnology, Shahid Beheshti University, Tehran 1983969411, Iran;
| | - Giulia Fani
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale G.B Morgagni 50, 50134 Florence, Italy; (G.F.); (C.C.)
| | - Cristina Cecchi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale G.B Morgagni 50, 50134 Florence, Italy; (G.F.); (C.C.)
| | - Fabrizio Chiti
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Viale G.B Morgagni 50, 50134 Florence, Italy; (G.F.); (C.C.)
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4
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Forloni G, Chiesa R, Bugiani O, Salmona M, Tagliavini F. Review: PrP 106-126 - 25 years after. Neuropathol Appl Neurobiol 2019; 45:430-440. [PMID: 30635947 DOI: 10.1111/nan.12538] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 12/10/2018] [Indexed: 12/14/2022]
Abstract
A quarter of a century ago, we proposed an innovative approach to study the pathogenesis of prion disease, one of the most intriguing biomedical problems that remains unresolved. The synthesis of a peptide homologous to residues 106-126 of the human prion protein (PrP106-126), a sequence present in the PrP amyloid protein of Gerstmann-Sträussler-Scheinker syndrome patients, provided a tractable tool for investigating the mechanisms of neurotoxicity. Together with several other discoveries at the beginning of the 1990s, PrP106-126 contributed to underpin the role of amyloid in the pathogenesis of protein-misfolding neurodegenerative disorders. Later, the role of oligomers on one hand and of prion-like spreading of pathology on the other further clarified mechanisms shared by different neurodegenerative conditions. Our original report on PrP106-126 neurotoxicity also highlighted a role for programmed cell death in CNS diseases. In this review, we analyse the prion research context in which PrP106-126 first appeared and the advances in our understanding of prion disease pathogenesis and therapeutic perspectives 25 years later.
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Affiliation(s)
- G Forloni
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy
| | - R Chiesa
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy
| | - O Bugiani
- Department of Biochemistry, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy
| | - M Salmona
- Department of Biochemistry, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano, Italy
| | - F Tagliavini
- Fondazione IRCCS Istituto Neurologico "Carlo Besta", Milano, Italy
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Silva CJ. Applying the tools of chemistry (mass spectrometry and covalent modification by small molecule reagents) to the detection of prions and the study of their structure. Prion 2015; 8:42-50. [PMID: 24509645 DOI: 10.4161/pri.27891] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Prions are molecular pathogens, able to convert a normal cellular prion protein (PrP(C)) into a prion (PrP(Sc)). The information necessary for this conversion is contained in the conformation of PrP(Sc). Mass spectrometry (MS) and small-molecule covalent reactions have been used to study prions. Mass spectrometry has been used to detect and quantitate prions in the attomole range (10⁻¹⁸ mole). MS-based analysis showed that both possess identical amino acid sequences, one disulfide bond, a GPI anchor, asparagine-linked sugar antennae, and unoxidized methionines. Mass spectrometry has been used to define elements of the secondary and tertiary structure of wild-type PrP(Sc) and GPI-anchorless PrP(Sc). It has also been used to study the quaternary structure of the PrP(Sc) multimer. Small molecule reagents react differently with the same lysine in the PrP(C) conformation than in the PrP(Sc) conformation. Such differences can be detected by Western blot using mAbs with lysine-containing epitopes, such as 3F4 and 6D11. This permits the detection of PrP(Sc) without the need for proteinase K pretreatment and can be used to distinguish among prion strains. These results illustrate how two important chemical tools, mass spectrometry and covalent modification by small molecules, are being applied to the detection and structural study of prions. Furthermore these tools are or can be applied to the study of the other protein misfolding diseases such as Alzheimer Disease, Parkinson Disease, or ALS.
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Wang X, Cui M, Zhao C, He L, Zhu D, Wang B, Du W. Regulation of aggregation behavior and neurotoxicity of prion neuropeptides by platinum complexes. Inorg Chem 2014; 53:5044-54. [PMID: 24787240 DOI: 10.1021/ic500092t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Prion diseases belong to a group of infectious, fatal neurodegenerative disorders. The conformational conversion of a cellular prion protein (PrP(C)) into an abnormal misfolded isoform (PrP(Sc)) is the key event in prion disease pathology. PrP106-126 resembles PrP(Sc) in some physicochemical and biological characteristics, such as apoptosis induction in neurons, fibrillar formation, and mediation of the conversion of native cellular PrP(C) to PrP(Sc). Numerous studies have been conducted to explore the inhibiting methods on the aggregation and neurotoxicity of prion neuropeptide PrP106-126. We showed that PrP106-126 aggregation, as assessed by fluorescence assay and atomic force microscopy, is inhibited by platinum complexes cisplatin, carboplatin, and Pt(bpy)Cl2. ESI-MS and NMR assessments of PrP106-126 and its mutant peptides demonstrate that platinum complexes bind to the peptides in coordination and nonbonded interactions, which rely on the ligand properties and the peptide sequence. In peptides, methionine residue is preferred as a potent binding site over histidine residue for the studied platinum complexes, implying a typical thiophile characteristic of platinum. The neurotoxicity induced by PrP106-126 is better inhibited by Pt(bpy)Cl2 and cisplatin. Furthermore, the ligand configuration contributes to both the binding affinity and the inhibition of peptide aggregation. The pursuit of novel platinum candidates that selectively target prion neuropeptide is noteworthy for medicinal inorganic chemistry and chemical biology.
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Affiliation(s)
- Xuesong Wang
- Department of Chemistry, Renmin University of China , Beijing 100872, People's Republic of China
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7
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Glaves JP, Gorski PA, Alier K, Ma L, Renault L, Primeau JO, Jhamandas JH, Young HS. Distinct morphological and electrophysiological properties of an elk prion peptide. Peptides 2013; 40:49-56. [PMID: 23262353 DOI: 10.1016/j.peptides.2012.12.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/08/2012] [Accepted: 12/10/2012] [Indexed: 12/20/2022]
Abstract
A key event in prion diseases is the conversion of the prion protein (PrP) from its native α-helical conformation to a misfolded, β-sheet rich conformation. Thus, preventing or reversing PrP misfolding could provide a means to disrupt prion disease progression and transmission. However, determining the structure of misfolded PrP has been notoriously difficult due to its inherent heterogeneity and aggregation behavior. For these reasons, simplified peptide fragments have been used as models that recapitulate characteristics of full-length PrP, such as amyloid-like aggregation and fibril formation, and in vitro toxicity. We provide a biochemical and structural comparison of PrP(127-147) peptides from elk, bovine and hamster using electrophysiology, electron microscopy and fluorescence. Our results demonstrate that the PrP(127-147) peptides adopt distinct populations of fibril structures. In addition, the elk PrP(127-147) peptide is unique in its ability to enhance Thioflavin T fluorescence and its ability to modulate neuronal ion channel conductances.
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Affiliation(s)
- John Paul Glaves
- Department of Biochemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2H7
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Cui ZJ, Han ZQ, Li ZY. Modulating protein activity and cellular function by methionine residue oxidation. Amino Acids 2012; 43:505-17. [PMID: 22146868 DOI: 10.1007/s00726-011-1175-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 11/21/2011] [Indexed: 02/07/2023]
Abstract
The sulfur-containing amino acid residue methionine (Met) in a peptide/protein is readily oxidized to methionine sulfoxide [Met(O)] by reactive oxygen species both in vitro and in vivo. Methionine residue oxidation by oxidants is found in an accumulating number of important proteins. Met sulfoxidation activates calcium/calmodulin-dependent protein kinase II and the large conductance calcium-activated potassium channels, delays inactivation of the Shaker potassium channel ShC/B and L-type voltage-dependent calcium channels. Sulfoxidation at critical Met residues inhibits fibrillation of atherosclerosis-related apolipoproteins and multiple neurodegenerative disease-related proteins, such as amyloid beta, α-synuclein, prion, and others. Methionine residue oxidation is also correlated with marked changes in cellular activities. Controlled key methionine residue oxidation may be used as an oxi-genetics tool to dissect specific protein function in situ.
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Affiliation(s)
- Zong Jie Cui
- Institute of Cell Biology, Beijing Normal University, Beijing 100875, China.
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9
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Prion Peptide PrP106-126 Induces Inducible Nitric Oxide Synthase and Proinflammatory Cytokine Gene Expression Through the Activation of NF-κB in Macrophage Cells. DNA Cell Biol 2012; 31:833-8. [DOI: 10.1089/dna.2011.1362] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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10
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Martínez J, Lisa S, Sánchez R, Kowalczyk W, Zurita E, Teixidó M, Giralt E, Andreu D, Avila J, Gasset M. Selenomethionine incorporation into amyloid sequences regulates fibrillogenesis and toxicity. PLoS One 2011; 6:e27999. [PMID: 22132190 PMCID: PMC3222675 DOI: 10.1371/journal.pone.0027999] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Accepted: 10/30/2011] [Indexed: 11/30/2022] Open
Abstract
Background The capacity of a polypeptide chain to engage in an amyloid formation process and cause a conformational disease is contained in its sequence. Some of the sequences undergoing fibrillation contain critical methionine (Met) residues which in vivo can be synthetically substituted by selenomethionine (SeM) and alter their properties. Methodology/Principal Findings Using peptide synthesis, biophysical techniques and cell viability determinations we have studied the effect of the substitution of methionine (Met) by selenomethionine (SeM) on the fibrillogenesis and toxic properties of Aβ40 and HuPrP(106–140). We have found that the effects display site-specificity and vary from inhibition of fibrillation and decreased toxicity ([SeM35]Aβ40, [SeM129]HuPrP(106–140) and [SeM134]HuPrP(106–140)), retarded assembly, modulation of polymer shape and retention of toxicity ([SeM112]HuPrP(106–140) to absence of effects ([SeM109]HuPrP(106–140)). Conclusions/Significance This work provides direct evidence that the substitution of Met by SeM in proamyloid sequences has a major impact on their self-assembly and toxic properties, suggesting that the SeM pool can play a major role in dictating the allowance and efficiency of a polypeptide chain to undergo toxic polymerization.
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Affiliation(s)
- Javier Martínez
- Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Silvia Lisa
- Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Rosa Sánchez
- Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Wioleta Kowalczyk
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, Barcelona, Spain
| | - Esther Zurita
- Institute for Research in Biomedicine, Barcelona, Spain
| | | | - Ernest Giralt
- Institute for Research in Biomedicine, Barcelona, Spain
- Department of Organic Chemistry, University of Barcelona, Barcelona, Spain
| | - David Andreu
- Department of Experimental and Health Sciences, Pompeu Fabra University, Barcelona Biomedical Research Park, Barcelona, Spain
| | - Jesús Avila
- Centro de Biologia Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain
| | - María Gasset
- Instituto de Química-Física Rocasolano, Consejo Superior de Investigaciones Científicas, Madrid, Spain
- * E-mail:
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11
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Inhibition of peptide aggregation by lipids: Insights from coarse-grained molecular simulations. J Mol Graph Model 2011; 29:597-607. [DOI: 10.1016/j.jmgm.2010.11.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 10/30/2010] [Accepted: 11/01/2010] [Indexed: 11/22/2022]
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12
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Binger KJ, Griffin MDW, Heinemann SH, Howlett GJ. Methionine-oxidized amyloid fibrils are poor substrates for human methionine sulfoxide reductases A and B2. Biochemistry 2010; 49:2981-3. [PMID: 20218727 DOI: 10.1021/bi902203m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A common feature of many amyloid diseases is the appearance of oxidized, aggregated proteins. Methionine is one of the most readily oxidized amino acids, and its oxidative state is regulated in vivo by the methionine sulfoxide reductases (Msr). Here, we have explored the basis by which methionine oxidation is linked to amyloid disease by comparing the reduction of oxidized amyloid fibrils and monomer. We show that oxidized amyloid fibrils are not as effectively reduced by the Msr enzymes as the monomer. This work suggests a mechanism by which oxidized proteins and aggregates can accumulate as a part of degenerative disease.
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Affiliation(s)
- Katrina J Binger
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Parkville, Victoria, Australia.
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13
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Morshedi D, Ebrahim-Habibi A, Moosavi-Movahedi AA, Nemat-Gorgani M. Chemical modification of lysine residues in lysozyme may dramatically influence its amyloid fibrillation. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2010; 1804:714-22. [DOI: 10.1016/j.bbapap.2009.11.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2009] [Revised: 10/31/2009] [Accepted: 11/12/2009] [Indexed: 12/20/2022]
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Abstract
The crucial event in the development of transmissible spongiform encephalopathies (TSEs) is the conformational change of a host-encoded membrane protein - the cellular PrPC - into a disease associated, fibril-forming isoform PrPSc. This conformational transition from the α-helix-rich cellular form into the mainly β-sheet containing counterpart initiates an ‘autocatalytic’ reaction which leads to the accumulation of amyloid fibrils in the central nervous system (CNS) and to neurodegeneration, a hallmark of TSEs. The exact molecular mechanisms which lead to the conformational change are still unknown. It also remains to be brought to light how a polypeptide chain can adopt at least two stable conformations. This review focuses on structural aspects of the prion protein with regard to protein-protein interactions and the initiation of prion protein misfolding. It therefore highlights parts of the protein which might play a notable role in the conformational transition from PrPC to PrPSc and consequently in inducing a fatal chain reaction of protein misfolding. Furthermore, features of different proteins, which are able to adopt insoluble fibrillar states under certain circumstances, are compared to PrP in an attempt to understand the unique characteristics of prion diseases.
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Affiliation(s)
- L Kupfer
- Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, T2N 4N1, Canada
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15
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Legge FS, Binger KJ, Griffin MDW, Howlett GJ, Scanlon D, Treutlein H, Yarovsky I. Effect of Oxidation and Mutation on the Conformational Dynamics and Fibril Assembly of Amyloidogenic Peptides Derived from Apolipoprotein C-II. J Phys Chem B 2009; 113:14006-14. [DOI: 10.1021/jp903842u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. S. Legge
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - K. J. Binger
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - M. D. W. Griffin
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - G. J. Howlett
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - D. Scanlon
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - H. Treutlein
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
| | - I. Yarovsky
- Applied Physics, School of Applied Sciences, RMIT University, Melbourne, VIC, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; and Cytopia Research Pty. Ltd., Melbourne, VIC, Australia
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16
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Yamamoto N, Kuwata K. Difference in redox behaviors between copper-binding octarepeat and nonoctarepeat sites in prion protein. J Biol Inorg Chem 2009; 14:1209-18. [DOI: 10.1007/s00775-009-0564-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Accepted: 06/22/2009] [Indexed: 02/07/2023]
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Core structure of amyloid fibrils formed by residues 106-126 of the human prion protein. Structure 2009; 17:417-26. [PMID: 19278656 DOI: 10.1016/j.str.2008.12.018] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2008] [Revised: 11/24/2008] [Accepted: 12/21/2008] [Indexed: 11/21/2022]
Abstract
Peptides comprising residues 106-126 of the human prion protein (PrP) exhibit many features of the full-length protein. PrP(106-126) induces apoptosis in neurons, forms fibrillar aggregates, and can mediate the conversion of native cellular PrP (PrP(C)) to the scrapie form (PrP(Sc)). Despite a wide range of biochemical and biophysical studies on this peptide, including investigation of its propensity for aggregation, interactions with cell membranes, and PrP-like toxicity, the structure of amyloid fibrils formed by PrP(106-126) remains poorly defined. In this study we use solid-state nuclear magnetic resonance to define the secondary and quaternary structure of PrP(106-126) fibrils. Our results reveal that PrP(106-126) forms in-register parallel beta sheets, stacked in an antiparallel fashion within the mature fibril. The close intermolecular contacts observed in the fibril core provide a rational for the sequence-dependent behavior of PrP(106-126), and provide a basis for further investigation of its biological properties.
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Redecke L, Binder S, Elmallah MIY, Broadbent R, Tilkorn C, Schulz B, May P, Goos A, Eich A, Rübhausen M, Betzel C. UV-light-induced conversion and aggregation of prion proteins. Free Radic Biol Med 2009; 46:1353-61. [PMID: 19249347 DOI: 10.1016/j.freeradbiomed.2009.02.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 01/15/2009] [Accepted: 02/13/2009] [Indexed: 11/21/2022]
Abstract
Increasing evidence suggests a central role for oxidative stress in the pathology of prion diseases, a group of fatal neurodegenerative disorders associated with structural conversion of the prion protein (PrP). Because UV-light-induced protein damage is mediated by direct photo-oxidation and radical reactions, we investigated the structural consequences of UVB radiation on recombinant murine and human prion proteins at pH 7.4 and pH 5.0. As revealed by circular dichroism and dynamic light scattering measurements, the observed PrP aggregation follows two independent pathways: (i) complete unfolding of the protein structure associated with rapid precipitation or (ii) specific structural conversion into distinct soluble beta-oligomers. The choice of pathway was directly attributed to the chromophoric properties of the PrP species and the susceptibility to oxidation. Regarding size, the oligomers characterized in this study share a high degree of identity with oligomeric species formed after structural destabilization induced by other triggers, which significantly strengthens the theory that partly unfolded intermediates represent initial precursor molecules directing the pathway of PrP aggregation. Moreover, we identified the first suitable photo-trigger capable of inducing refolding of PrP, which has an important biotechnological impact in terms of analyzing the conversion process on small time scales.
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Affiliation(s)
- Lars Redecke
- Institute of Biochemistry and Molecular Biology, Department of Chemistry, University of Hamburg, Germany
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Zheng W, Wang L, Hong Y, Sha Y. PrP106–126 peptide disrupts lipid membranes: Influence of C-terminal amidation. Biochem Biophys Res Commun 2009; 379:298-303. [DOI: 10.1016/j.bbrc.2008.12.049] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2008] [Accepted: 12/10/2008] [Indexed: 11/30/2022]
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Can copper binding to the prion protein generate a misfolded form of the protein? Biometals 2009; 22:159-75. [PMID: 19140013 DOI: 10.1007/s10534-008-9196-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2008] [Accepted: 12/07/2008] [Indexed: 10/21/2022]
Abstract
The native prion protein (PrP) has a two domain structure, with a globular folded alpha-helical C-terminal domain and a flexible extended N-terminal region. The latter can selectively bind Cu(2+) via four His residues in the octarepeat (OR) region, as well as two sites (His96 and His111) outside this region. In the disease state, the folded C-terminal domain of PrP undergoes a conformational change, forming amorphous aggregates high in beta-sheet content. Cu(2+) bound to the ORs can be redox active and has been shown to induce cleavage within the OR region, a process requiring conserved Trp residues. Using computational modeling, we have observed that electron transfer from Trp residues to copper can be favorable. These models also reveal that an indole-based radical cation or Cu(+) can initiate reactions leading to protein backbone cleavage. We have also demonstrated, by molecular dynamics simulations, that Cu(2+) binding to the His96 and His111 residues in the remaining PrP N-terminal fragment can induce localized beta-sheet structure, allowing us to suggest a potential mechanism for the initiation of beta-sheet misfolding in the C-terminal domain by Cu(2+).
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21
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Hung A, Griffin MDW, Howlett GJ, Yarovsky I. Effects of oxidation, pH and lipids on amyloidogenic peptide structure: implications for fibril formation? EUROPEAN BIOPHYSICS JOURNAL: EBJ 2008; 38:99-110. [PMID: 18769912 DOI: 10.1007/s00249-008-0363-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2008] [Revised: 08/01/2008] [Accepted: 08/04/2008] [Indexed: 10/21/2022]
Abstract
We have performed experimental and computational studies to investigate the influences of phospholipids, methionine oxidation and acidic pH on amyloid fibril formation by a peptide derived from human apolipoprotein C-II (apoC-II), a known component of proteinaceous atherosclerotic plaques. Fibril growth monitored by thioflavin T fluorescence revealed inhibition under lipid-rich and oxidising conditions. We subsequently performed fully-solvated atomistic molecular dynamics (MD) simulations of the peptide monomer to study its conformations under both fibril favouring (neutral and low pH) and inhibiting (lipid-rich and oxidising) conditions. Examination of the chain topology, backbone hydrogen-bonding patterns and aromatic sidechain orientations of the peptide under different conditions reveals that, while the peptide adopts similar structures under the fibril-favouring conditions, significantly different structures are obtained under fibril-disruptive conditions. Based on our results, we advance hypotheses for the roles of peptide conformation on aggregation and fibrillisation propensities.
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Affiliation(s)
- Andrew Hung
- School of Applied Sciences, RMIT University, GPO Box 2476V, Melbourne, VIC 3001, Australia
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22
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Binger KJ, Griffin MDW, Howlett GJ. Methionine oxidation inhibits assembly and promotes disassembly of apolipoprotein C-II amyloid fibrils. Biochemistry 2008; 47:10208-17. [PMID: 18729385 DOI: 10.1021/bi8009339] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Methionine residues are linked to the pathogenicity of several amyloid diseases; however, the mechanism of this relationship is largely unknown. These diseases are characterized, in vivo, by the accumulation of insoluble proteinaceous plaques, of which the major constituents are amyloid fibrils. In vitro, methionine oxidation has been shown to modulate fibril assembly in several well-characterized amyloid systems. Human apolipoprotein (apo) C-II contains two methionine residues (Met-9 and Met-60) and readily self-assembles in vitro to form homogeneous amyloid fibrils, thus providing a convenient system to examine the effect of methionine oxidation on amyloid fibril formation and stability. Upon oxidation of the methionine residues of apoC-II with hydrogen peroxide, fibril formation was inhibited. Oxidized apoC-II molecules did not inhibit native apoC-II assembly, indicating that the oxidized molecules had a reduced ability to interact with the growing fibrils. Single Met-Val substitutions were performed and showed that oxidation of Met-60 had a more significant inhibitory effect than oxidation of Met-9. In addition, Met-Gln substitutions designed to mimic the effect of oxidation on side chain hydrophilicity showed that a change in hydrophobicity at position 60 within the core region of the fibril had a potent inhibitory effect. The oxidation of preformed apoC-II fibrils caused their dissociation; however, mutants in which the Met-60 was substituted with a valine were protected from this peroxide-induced dissociation. This work highlights an important role for methionine in the formation of amyloid fibril structure and gives new insight into how oxidation affects the stability of mature fibrils.
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Affiliation(s)
- Katrina J Binger
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria 3010, Australia.
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