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Bilog M, Cersosimo J, Vigil I, Desamero RZB, Profit AA. Effect of a SARS-CoV-2 Protein Fragment on the Amyloidogenic Propensity of Human Islet Amyloid Polypeptide. ACS Chem Neurosci 2024; 15:4431-4440. [PMID: 39582236 DOI: 10.1021/acschemneuro.4c00473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2024] Open
Abstract
Infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the onset of COVID-19 have been linked to an increased risk of developing type 2 diabetes. While a variety of mechanisms may ultimately be responsible for the onset of type 2 diabetes under these circumstances, one mechanism that has been postulated involves the increased aggregation of human islet amyloid polypeptide (hIAPP) through direct interaction with SARS-CoV-2 viral proteins. Previous computational studies investigating this possibility revealed that a nine-residue peptide fragment known as SK9 (SFYVYSRVK) from the SARS-CoV-2 envelope protein can stabilize the native conformation of hIAPP1-37 by interacting with the N-terminal region of amylin. One of the areas particularly stabilized through this interaction encompasses residues 15-28 of amylin. Given these findings, we investigated whether SK9 could interact with short amyloidogenic sequences derived from this region of amylin. Here, we employ docking studies, molecular dynamics simulations, and biophysical techniques to provide theoretical as well as direct experimental evidence that SK9 can interact with hIAPP12-18 and hIAPP20-29 peptides. Furthermore, we demonstrate that SK9 not only can interact with these sequences but also serves to prevent the self-assembly of these amyloidogenic peptides. In striking contrast, we also show that SK9 has little effect on the amyloidogenic propensity of full-length amylin. These findings are contrary to previous published simulations involving SK9 and hIAPP1-37. Such observations may assist in clarifying potential mechanisms of the SARS-CoV-2 interaction with hIAPP and its relevance to the onset of type 2 diabetes in the setting of COVID-19.
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Affiliation(s)
- Marvin Bilog
- PhD Programs in Chemistry and Biochemistry, the Graduate Center of the City University of New York, New York, New York 10016, United States
- Department of Chemistry, York College of the City University of New York, Jamaica, New York 11451, United States
| | - Jennifer Cersosimo
- PhD Programs in Chemistry and Biochemistry, the Graduate Center of the City University of New York, New York, New York 10016, United States
- Department of Chemistry, York College of the City University of New York, Jamaica, New York 11451, United States
| | - Iliana Vigil
- Department of Chemistry, York College of the City University of New York, Jamaica, New York 11451, United States
| | - Ruel Z B Desamero
- PhD Programs in Chemistry and Biochemistry, the Graduate Center of the City University of New York, New York, New York 10016, United States
- Department of Chemistry, York College of the City University of New York, Jamaica, New York 11451, United States
| | - Adam A Profit
- PhD Programs in Chemistry and Biochemistry, the Graduate Center of the City University of New York, New York, New York 10016, United States
- Department of Chemistry, York College of the City University of New York, Jamaica, New York 11451, United States
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Babych M, Garelja ML, Nguyen PT, Hay DL, Bourgault S. Converting the Amyloidogenic Islet Amyloid Polypeptide into a Potent Nonaggregating Peptide Ligand by Side Chain-to-Side Chain Macrocyclization. J Am Chem Soc 2024; 146:25513-25526. [PMID: 39225636 DOI: 10.1021/jacs.4c05297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
The islet amyloid polypeptide (IAPP), also known as amylin, is a hormone playing key physiological roles. However, its aggregation and deposition in the pancreatic islets are associated with type 2 diabetes. While this peptide adopts mainly a random coil structure in solution, its secondary conformational conversion into α-helix represents a critical step for receptor activation and contributes to amyloid formation and associated cytotoxicity. Considering the large conformational landscape and high amyloidogenicity of the peptide, as well as the complexity of the self-assembly process, it is challenging to delineate the delicate interplay between helical folding, peptide aggregation, and receptor activation. In the present study, we probed the roles of helical folding on the function-toxicity duality of IAPP by restricting its conformational ensemble through side chain-to-side chain stapling via azide-alkyne cycloaddition. Intramolecular macrocyclization (i; i + 4) constrained IAPP into α-helix and inhibited its aggregation into amyloid fibrils. These helical derivatives slowed down the self-assembly of unmodified IAPP. Site-specific macrocyclization modulated the capacity of IAPP to perturb lipid bilayers and cell plasma membrane and reduced, or even fully inhibited, the cytotoxicity associated with aggregation. Furthermore, the α-helical IAPP analogs showed moderate to high potency toward cognate G protein-coupled receptors. Overall, these results indicate that macrocyclization represents a promising strategy to protect an amyloidogenic peptide hormone from aggregation and associated toxicity, while maintaining high receptor activity.
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Affiliation(s)
- Margaryta Babych
- Department of Chemistry, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
| | - Michael L Garelja
- Department of Pharmacology and Toxicology, University of Otago, 18 Frederick Street, Dunedin 9016, New Zealand
| | - Phuong Trang Nguyen
- Department of Chemistry, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
| | - Debbie L Hay
- Department of Pharmacology and Toxicology, University of Otago, 18 Frederick Street, Dunedin 9016, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, 3A Symonds Street, Auckland 92019, New Zealand
| | - Steve Bourgault
- Department of Chemistry, Université du Québec à Montréal, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, C.P. 8888, Succursale Centre-Ville, Montréal H3C 3P8, Canada
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Nayak K, Ghosh P, Barman S, Sudhamalla B, Theato P, De P. Amyloid β-Peptide Segment Conjugated Side-Chain Proline-Based Polymers as Potent Inhibitors in Lysozyme Amyloidosis. Bioconjug Chem 2024; 35:312-323. [PMID: 38420925 DOI: 10.1021/acs.bioconjchem.3c00509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
Developing effective amyloidosis inhibitors poses a significant challenge due to the dynamic nature of the protein structures, the complex interplay of interfaces in protein-protein interactions, and the irreversible nature of amyloid assembly. The interactions of amyloidogenic polypeptides with other peptides play a pivotal role in modulating amyloidosis and fibril formation. This study presents a novel approach for designing and synthesizing amyloid interaction surfaces using segments derived from the amyloid-promoting sequence of amyloid β-peptide [VF(Aβ(18-19)/FF(Aβ(19-20)/LVF(Aβ(17-19)/LVFF(Aβ(17-20)], where VF, FF, LVF and LVFF stands for valine phenylalanine dipeptide, phenylalanine phenylalanine dipeptide, leucine valine phenylalanine tripeptide and leucine valine phenylalanine phenylalanine tetrapeptide, respectively. These segments are conjugated with side-chain proline-based methacrylate polymers serving as potent lysozyme amyloidosis inhibitors and demonstrating reduced cytotoxicity of amyloid aggregations. Di-, tri-, and tetra-peptide conjugated chain transfer agents (CTAs) were synthesized and used for the reversible addition-fragmentation chain transfer polymerization of tert-butoxycarbonyl (Boc)-proline methacryloyloxyethyl ester (Boc-Pro-HEMA). Deprotection of Boc-groups from the side-chain proline pendants resulted in water-soluble polymers with defined peptide chain ends as peptide-polymer bioconjugates. Among them, the LVFF-conjugated polymer acted as a potent inhibitor with significantly suppressed lysozyme amyloidosis, a finding supported by comprehensive spectroscopic, microscopic, and computational analyses. These results unveil the synergistic effect between the segment-derived amyloid β-peptide and side-chain proline-based polymers, offering new prospects for targeting lysozyme amyloidosis.
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Affiliation(s)
- Kasturee Nayak
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India
| | - Pooja Ghosh
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India
- Centre for Interdisciplinary Sciences, JIS Institute of Advanced Studies & Research (JISIASR) Kolkata, JIS University, GP Block, Sector-5, Salt Lake, Kolkata, West Bengal 700091, India
| | - Soumen Barman
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India
| | - Babu Sudhamalla
- Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India
| | - Patrick Theato
- Karlsruhe Institute of Technology (KIT), Institute for Chemical Technology and Polymer Chemistry (ITCP), Engesserstraße 18, Karlsruhe 76131, Germany
- Karlsruhe Institute of Technology (KIT), Soft Matter Synthesis Laboratory,Institute for Biological Interfaces III (IBG-3), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany
| | - Priyadarsi De
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal 741246, India
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Tsai HC, Huang CH, Tu LH. TPE conjugated islet amyloid polypeptide probe for detection of peptide oligomers. Biophys Chem 2024; 304:107129. [PMID: 37948788 DOI: 10.1016/j.bpc.2023.107129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/26/2023] [Accepted: 10/28/2023] [Indexed: 11/12/2023]
Abstract
Islet amyloid polypeptide (IAPP), also known as amylin, is a polypeptide hormone co-secreted with insulin by pancreatic β-cells. In general, IAPP is soluble and lacks a defined structure. However, under certain conditions, these peptides tend to aggregate into soluble oligomers, eventually forming insoluble amyloid fibrils with typical cross-β-sheet structures. Amylin aggregates, therefore, have been regarded as one of the hallmarks of type II diabetes (T2D). Among these aggregated species, oligomers were shown to exhibit significant cytotoxicity, leading to impaired β-cell function and reduced β-cell mass. Monitoring of oligomer appearance during IAPP fibrillation is of particular interest. In this study, we successfully grafted an aggregation-induced emission molecule, tetraphenylethylene (TPE), at the N-terminus of IAPP. By mixing a small amount of TPE-labeled IAPP with unlabeled IAPP, we were able to detect an increase in TPE fluorescence during the nucleation phase of IAPP aggregation in vitro. It may enable real-time monitoring of IAPP oligomer formation and is further applied in the diagnosis of T2D.
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Affiliation(s)
- Hsiao-Chieh Tsai
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ching-Hong Huang
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan
| | - Ling-Hsien Tu
- Department of Chemistry, National Taiwan Normal University, Taipei 11677, Taiwan.
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Khalifa J, Bourgault S, Gaudreault R. Interactions of Polyphenolic Gallotannins with Amyloidogenic Polypeptides Associated with Alzheimer's Disease: From Molecular Insights to Physiological Significance. Curr Alzheimer Res 2023; 20:603-617. [PMID: 38270140 DOI: 10.2174/0115672050277001231213073043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/30/2023] [Accepted: 11/10/2023] [Indexed: 01/26/2024]
Abstract
Polyphenols are natural compounds abundantly found in plants. They are known for their numerous benefits to human health, including antioxidant properties and anti-inflammatory activities. Interestingly, many studies have revealed that polyphenols can also modulate the formation of amyloid fibrils associated with disease states and can prevent the formation of cytotoxic oligomer species. In this review, we underline the numerous effects of four hydrolysable gallotannins (HGTs) with high conformational flexibility, low toxicity, and multi-targeticity, e.g., tannic acid, pentagalloyl glucose, corilagin, and 1,3,6-tri-O-galloyl-β-D-glucose, on the aggregation of amyloidogenic proteins associated with the Alzheimer's Disease (AD). These HGTs have demonstrated interesting abilities to reduce, at different levels, the formation of amyloid fibrils involved in AD, including those assembled from the amyloid β-peptide, the tubulin-associated unit, and the islet amyloid polypeptide. HGTs were also shown to disassemble pre-formed fibrils and to diminish cognitive decline in mice. Finally, this manuscript highlights the importance of further investigating these naturally occurring HGTs as promising scaffolds to design molecules that can interfere with the formation of proteotoxic oligomers and aggregates associated with AD pathogenesis.
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Affiliation(s)
- Jihane Khalifa
- Département de Chimie, Université du Québec à Montréal, 2101 Rue Jeanne-Mance, Montréal, QC, H2X 2J6, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, Canada
- Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montréal, QC, H2X 3Y7, Canada
| | - Steve Bourgault
- Département de Chimie, Université du Québec à Montréal, 2101 Rue Jeanne-Mance, Montréal, QC, H2X 2J6, Canada
- Quebec Network for Research on Protein Function, Engineering and Applications, PROTEO, Canada
| | - Roger Gaudreault
- Département de Chimie, Université du Québec à Montréal, 2101 Rue Jeanne-Mance, Montréal, QC, H2X 2J6, Canada
- Quebec Centre for Advanced Materials (QCAM), 3420 University Street, Montréal, QC, H2X 3Y7, Canada
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