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Chang CY, Wang SSS, Lai YR, Koh WG, Wu JW, Chiang YH. Ophthalmic drug effects on the amyloidogenesis of a transforming growth factor β-induced protein (TGFBIp) peptide fragment. Exp Eye Res 2024; 244:109932. [PMID: 38762008 DOI: 10.1016/j.exer.2024.109932] [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: 11/05/2023] [Revised: 03/30/2024] [Accepted: 05/15/2024] [Indexed: 05/20/2024]
Abstract
Drugs that can treat one disease may either be detrimental or beneficial toward another due to possible cross-interactions. Therefore, care in choosing a suitable drug for patients with multiple diseases is crucial in successful patient management. This study explores several currently available ophthalmic drugs used to treat common ocular diseases to understand how they can affect the amyloidogenesis of a transforming growth factor β-induced protein (TGFBIp) peptide fragment found in abundance in the corneal protein aggregation deposits of lattice corneal dystrophy (LCD) patients. Results from this study provided supporting evidence that some drugs intended to treat other diseases can enhance or inhibit fibrillar aggregation of TGFBIp peptide, which may have potential implication of affecting the disease progression of LCD by either worsening or ameliorating it. Comparisons of the different properties of ophthalmic compounds explored in this study may also provide some guidance for future design of drugs geared toward the treatment of LCD.
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Affiliation(s)
- Chia-Yu Chang
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Steven S-S Wang
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - You-Ren Lai
- Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering, Yonsei University, South Korea
| | - Josephine W Wu
- Department of Optometry, Yuanpei University of Medical Technology, Hsinchu City, 30015, Taiwan; Department of Optometry, Mackay Medical College, New Taipei City, 252, Taiwan.
| | - Yi-Hui Chiang
- Department of Ophthalmology, En Chu Kong Hospital, New Taipei City, 237, Taiwan.
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2
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De Oliveira DH, Gowda V, Sparrman T, Gustafsson L, Sanches Pires R, Riekel C, Barth A, Lendel C, Hedhammar M. Structural conversion of the spidroin C-terminal domain during assembly of spider silk fibers. Nat Commun 2024; 15:4670. [PMID: 38821983 PMCID: PMC11143275 DOI: 10.1038/s41467-024-49111-5] [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: 10/26/2023] [Accepted: 05/24/2024] [Indexed: 06/02/2024] Open
Abstract
The major ampullate Spidroin 1 (MaSp1) is the main protein of the dragline spider silk. The C-terminal (CT) domain of MaSp1 is crucial for the self-assembly into fibers but the details of how it contributes to the fiber formation remain unsolved. Here we exploit the fact that the CT domain can form silk-like fibers by itself to gain knowledge about this transition. Structural investigations of fibers from recombinantly produced CT domain from E. australis MaSp1 reveal an α-helix to β-sheet transition upon fiber formation and highlight the helix No4 segment as most likely to initiate the structural conversion. This prediction is corroborated by the finding that a peptide corresponding to helix No4 has the ability of pH-induced conversion into β-sheets and self-assembly into nanofibrils. Our results provide structural information about the CT domain in fiber form and clues about its role in triggering the structural conversion of spidroins during fiber assembly.
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Affiliation(s)
- Danilo Hirabae De Oliveira
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Center, Stockholm, Sweden
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Vasantha Gowda
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden
| | | | - Linnea Gustafsson
- Spiber Technologies AB, Roslagstullsbacken 15, 114 21, Stockholm, Sweden
| | | | - Christian Riekel
- European Synchrotron Radiation Facility, B.P. 220, F-38043, Grenoble Cedex, France
| | - Andreas Barth
- Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, Stockholm, Sweden.
| | - My Hedhammar
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, AlbaNova University Center, Stockholm, Sweden.
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3
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Sulatsky MI, Stepanenko OV, Stepanenko OV, Povarova OI, Kuznetsova IM, Turoverov KK, Sulatskaya AI. Broken but not beaten: Challenge of reducing the amyloids pathogenicity by degradation. J Adv Res 2024:S2090-1232(24)00161-9. [PMID: 38642804 DOI: 10.1016/j.jare.2024.04.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 04/22/2024] Open
Abstract
BACKGROUND The accumulation of ordered protein aggregates, amyloid fibrils, accompanies various neurodegenerative diseases (such as Parkinson's, Huntington's, Alzheimer's, etc.) and causes a wide range of systemic and local amyloidoses (such as insulin, hemodialysis amyloidosis, etc.). Such pathologies are usually diagnosed when the disease is already irreversible and a large amount of amyloid plaques have accumulated. In recent years, new drugs aimed at reducing amyloid levels have been actively developed. However, although clinical trials have demonstrated a reduction in amyloid plaque size with these drugs, their effect on disease progression has been controversial and associated with significant side effects, the reasons of which are not fully understood. AIM OF REVIEW The purpose of this review is to summarize extensive array of data on the effect of exogenous and endogenous factors (physico-mechanical effects, chemical effects of low molecular weight compounds, macromolecules and their complexes) on the structure and pathogenicity of mature amyloids for proposing future directions of the development of effective and safe anti-amyloid therapeutics. KEY SCIENTIFIC CONCEPTS OF REVIEW Our analysis show that destruction of amyloids is in most cases incomplete and degradation products often retain the properties of amyloids (including high and sometimes higher than fibrils, cytotoxicity), accelerate amyloidogenesis and promote the propagation of amyloids between cells. Probably, the appearance of protein aggregates, polymorphic in structure and properties (such as amorphous aggregates, fibril fragments, amyloid oligomers, etc.), formed because of uncontrolled degradation of amyloids, may be one of the reasons for the ambiguous effectiveness and serious side effects of the anti-amyloid drugs. This means that all medications that are supposed to be used both for degradation and slow down the fibrillogenesis must first be tested on mature fibrils: the mechanism of drug action and cytotoxic, seeding, and infectious activity of the degradation products must be analyzed.
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Affiliation(s)
- Maksim I Sulatsky
- Laboratory of Cell Morphology, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Olga V Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Olesya V Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Olga I Povarova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Irina M Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Konstantin K Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia
| | - Anna I Sulatskaya
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia.
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4
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Chowdhury S, Sarkar N. Exploring the potential of amyloids in biomedical applications: A review. Biotechnol Bioeng 2024; 121:26-38. [PMID: 37822225 DOI: 10.1002/bit.28569] [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: 04/19/2023] [Revised: 08/31/2023] [Accepted: 09/24/2023] [Indexed: 10/13/2023]
Abstract
Amyloid is defined as a fibrous quaternary structure formed by assembling protein or peptide monomers into intermolecularly hydrogen linked β-sheets. There is a prevalent issue with protein aggregation and the buildup of amyloid molecules, which results in human neurological illnesses including Alzheimer's and Parkinson's. But it is now evident that many organisms, like bacteria, fungi as well as humans, use the same fibrillar structure to carry out a variety of biological functions, such as structure and protection supporting interface transitions and cell-cell recognition, protein control and storage, epigenetic inheritance, and memory. Recent discoveries of self-assembling amyloidogenic peptides and proteins, based on the amyloid core structure, give rise to interesting biomaterials with potential uses in numerous industries. These functions dramatically diverge from the initial conception of amyloid fibrils as intrinsically diseased entities. Apart from the natural ability of amyloids to spontaneously arrange themselves and their exceptional material characteristics, this aspect has prompted extensive research into engineering artificial amyloids for generating various nanostructures, molecular substances, and combined materials. Here, we discuss significant developments in the artificial design of useful amyloids as well as how amyloid materials serve as examples of how function emerges from protein self-assembly at various length scales.
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Affiliation(s)
- Srijita Chowdhury
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
| | - Nandini Sarkar
- Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, Odisha, India
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Sonavane S, Westermark P, Rising A, Holm L. Regionalization of cell types in silk glands of Larinioides sclopetarius suggest that spider silk fibers are complex layered structures. Sci Rep 2023; 13:22273. [PMID: 38097700 PMCID: PMC10721825 DOI: 10.1038/s41598-023-49587-z] [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: 02/16/2023] [Accepted: 12/09/2023] [Indexed: 12/17/2023] Open
Abstract
In order to produce artificial silk fibers with properties that match the native spider silk we likely need to closely mimic the spinning process as well as fiber architecture and composition. To increase our understanding of the structure and function of the different silk glands of the orb weaver Larinioides sclopetarius, we used resin sections for detailed morphology, paraffin embedded sections for a variety of different histological stainings, and a histochemical method for localization of carbonic anhydrase activity. Our results show that all silk glands, except the tubuliform glands, are composed of two or more columnar epithelial cell types, some of which have not been described previously. We observed distinct regionalization of the cell types indicating sequential addition of secretory products during silk formation. This means that the major ampullate, minor ampullate, aciniform type II, and piriform silk fibers most likely are layered and that each layer has a specific composition. Furthermore, a substance that stains positive for polysaccharides may be added to the silk in all glands except in the type I aciniform glands. Active carbonic anhydrase was found in all silk glands and/or ducts except in the type I aciniform and tubuliform glands, with the strongest staining in aggregate glands and their ductal nodules. Carbonic anhydrase plays an important role in the generation of a pH gradient in the major ampullate glands, and our results suggest that some other glands may also harbor pH gradients.
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Affiliation(s)
- Sumalata Sonavane
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Per Westermark
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Anna Rising
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Huddinge, Sweden
| | - Lena Holm
- Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden.
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6
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Hofmaier M, Heger JE, Lentz S, Schwarz S, Müller-Buschbaum P, Scheibel T, Fery A, Müller M. Influence of the Sequence Motive Repeating Number on Protein Folding in Spider Silk Protein Films. Biomacromolecules 2023; 24:5707-5721. [PMID: 37934893 DOI: 10.1021/acs.biomac.3c00688] [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: 11/09/2023]
Abstract
Like multiblock copolymers, spider silk proteins are built of repetitive sequence motives. One prominent repetitive motif is based on the consensus sequence of spidroin 4 of the spider Araneus diadematus ADF4. The number x of the repeating sequence motives (C) determines the molecular weight of the recombinant ADF4-based, engineered spider silk protein denoted as eADF4(Cx). eADF4(Cx) can be used as a model for intrinsically disordered proteins (IDP) and to elucidate their folding. Herein, the influence of the variation of the sequence motive repeating number x (x = 1, 2, 4, 8, 16) on the protein folding within eADF4(Cx) films was investigated. eADF4(Cx) films were cast from 1,1,1,3,3,3-hexafluoropropan-2-ol (HFIP) solutions onto planar silicon model substrates, revealing mainly helical or random coil structure. Upon treatment with methanol vapor (ptm), the formation of crystalline β-sheets was triggered. Dichroic Fourier-transform infrared (FTIR) spectroscopy, circular dichroism, spectroscopic ellipsometry, atomic force microscopy, grazing-incidence small-angle X-ray scattering (GISAXS), grazing-incidence wide-angle X-ray scattering (GIWAXS), and electrokinetic and contact angle measurements were used to get information concerning the secondary structure and folding kinetics, orientation of β-sheets, the ratio of parallel/antiparallel β-sheets, domain sizes and distributions, surface topography, surface potential, hydrophobicity and the film integrity under water. Significant differences in the final β-sheet content, the share of antiparallel β-sheet structures, film integrity, surface potential, and isoelectric points between eADF4(Cx) with x = 1, 2 and eADF4(Cx) with x = 4, 8, 16 gave new insights in the molecular weight-dependent structure formation and film properties of IDP systems. GISAXS and kinetic measurements confirmed a relation between β-sheet crystal growth rate and final β-sheet crystal size. Further, competing effects of reduced diffusibility hindering accelerated crystal growth and enhanced backfolding promoting accelerated crystal growth with increasing molecular weight were discussed.
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Affiliation(s)
- Mirjam Hofmaier
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Dresden 01069, Germany
- Chair of Physical Chemistry of Polymeric Materials, Technical University Dresden (TUD), Dresden 01069, Germany
| | - Julian E Heger
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, Garching 85748, Germany
| | - Sarah Lentz
- Functional Polymer Interfaces Group, University of Bayreuth, Bayreuth 95447, Germany
| | - Simona Schwarz
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Dresden 01069, Germany
| | - Peter Müller-Buschbaum
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, Garching 85748, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Garching 85748, Germany
| | - Thomas Scheibel
- Chair of Biomaterials, University of Bayreuth, Bayreuth 95447, Germany
- Bayreuth Center of Colloids and Interfaces (BZKG), University of Bayreuth, Bayreuth 95440, Germany
- Bayreuth Center for Molecular Bioscience (BZMB), University of Bayreuth, Bayreuth 95440, Germany
- Bayreuth Center for Material Science and Engineering (BayMAT), Universität Bayreuth, Bayreuth 95440, Germany
- Bavarian Polymer Institute (BPI), University of Bayreuth, Bayreuth 95440, Germany
| | - Andreas Fery
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Dresden 01069, Germany
- Chair of Physical Chemistry of Polymeric Materials, Technical University Dresden (TUD), Dresden 01069, Germany
| | - Martin Müller
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Dresden 01069, Germany
- Chair of Macromolecular Chemistry, Technical University of Dresden (TUD), Dresden 01062, Germany
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7
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Qi X, Wang Y, Yu H, Liu R, Leppert A, Zheng Z, Zhong X, Jin Z, Wang H, Li X, Wang X, Landreh M, A Morozova-Roche L, Johansson J, Xiong S, Iashchishyn I, Chen G. Spider Silk Protein Forms Amyloid-Like Nanofibrils through a Non-Nucleation-Dependent Polymerization Mechanism. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2304031. [PMID: 37455347 DOI: 10.1002/smll.202304031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/29/2023] [Indexed: 07/18/2023]
Abstract
Amyloid fibrils-nanoscale fibrillar aggregates with high levels of order-are pathogenic in some today incurable human diseases; however, there are also many physiologically functioning amyloids in nature. The process of amyloid formation is typically nucleation-elongation-dependent, as exemplified by the pathogenic amyloid-β peptide (Aβ) that is associated with Alzheimer's disease. Spider silk, one of the toughest biomaterials, shares characteristics with amyloid. In this study, it is shown that forming amyloid-like nanofibrils is an inherent property preserved by various spider silk proteins (spidroins). Both spidroins and Aβ capped by spidroin N- and C-terminal domains, can assemble into macroscopic spider silk-like fibers that consist of straight nanofibrils parallel to the fiber axis as observed in native spider silk. While Aβ forms amyloid nanofibrils through a nucleation-dependent pathway and exhibits strong cytotoxicity and seeding effects, spidroins spontaneously and rapidly form amyloid-like nanofibrils via a non-nucleation-dependent polymerization pathway that involves lateral packing of fibrils. Spidroin nanofibrils share amyloid-like properties but lack strong cytotoxicity and the ability to self-seed or cross-seed human amyloidogenic peptides. These results suggest that spidroins´ unique primary structures have evolved to allow functional properties of amyloid, and at the same time direct their fibrillization pathways to avoid formation of cytotoxic intermediates.
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Affiliation(s)
- Xingmei Qi
- The Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Yu Wang
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14157, Sweden
- College of Wildlife and Protected Area, Northeast Forestry University, Harbin, 150040, China
| | - Hairui Yu
- The Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Ruifang Liu
- The Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Axel Leppert
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solna, 17165, Sweden
| | - Zihan Zheng
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14157, Sweden
- Department of Pharmacology, Xi'an Jiaotong University, Shaanxi, 710061, China
| | - Xueying Zhong
- School of Engineering Sciences in Chemistry, Biotechnology and Health, Department of Biomedical Engineering and Health Systems, KTH Royal Institute of Technology, Huddinge, 14152, Sweden
| | - Zhen Jin
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14157, Sweden
- Department of Pharmacology, Xi'an Jiaotong University, Shaanxi, 710061, China
| | - Han Wang
- The Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Xiaoli Li
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, 400016, China
| | - Xiuzhe Wang
- Department of Neurology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200233, China
| | - Michael Landreh
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solna, 17165, Sweden
| | | | - Jan Johansson
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14157, Sweden
| | - Sidong Xiong
- The Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Igor Iashchishyn
- Department of Medical Biochemistry and Biophysics, Umeå University, Umeå, 90187, Sweden
| | - Gefei Chen
- Department of Biosciences and Nutrition, Karolinska Institutet, Huddinge, 14157, Sweden
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8
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Xu D, Zhou J, Soon WL, Kutzli I, Molière A, Diedrich S, Radiom M, Handschin S, Li B, Li L, Sturla SJ, Ewald CY, Mezzenga R. Food amyloid fibrils are safe nutrition ingredients based on in-vitro and in-vivo assessment. Nat Commun 2023; 14:6806. [PMID: 37884488 PMCID: PMC10603083 DOI: 10.1038/s41467-023-42486-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 10/12/2023] [Indexed: 10/28/2023] Open
Abstract
Food protein amyloid fibrils have superior technological, nutritional, sensorial, and physical properties compared to native monomers, but there is as yet insufficient understanding of their digestive fate and safety for wide consumption. By combining SDS-PAGE, ELISA, fluorescence, AFM, MALDI-MS, CD, microfluidics, and SAXS techniques for the characterization of β-lactoglobulin and lysozyme amyloid fibrils subjected to in-vitro gastrointestinal digestion, here we show that either no noticeable conformational differences exist between amyloid aggregates and their monomer counterparts after the gastrointestinal digestion process (as in β-lactoglobulin), or that amyloid fibrils are digested significantly better than monomers (as in lysozyme). Moreover, in-vitro exposure of human cell lines and in-vivo studies with C. elegans and mouse models, indicate that the digested fibrils present no observable cytotoxicity, physiological abnormalities in health-span, nor accumulation of fibril-induced plaques in brain nor other organs. These extensive in-vitro and in-vivo studies together suggest that the digested food amyloids are at least equally as safe as those obtained from the digestion of corresponding native monomers, pointing to food amyloid fibrils as potential ingredients for human nutrition.
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Affiliation(s)
- Dan Xu
- School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510640, China
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
| | - Jiangtao Zhou
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland.
| | - Wei Long Soon
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
- Center for Sustainable Materials (SusMat), School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Ines Kutzli
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
| | - Adrian Molière
- Institute of Translational Medicine, Department of Health Sciences and Technology (HEST), ETH Zurich, Schwerzenbach, Switzerland
| | - Sabine Diedrich
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
| | - Milad Radiom
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
- Laboratory of Food Immunology, Institute of Food, Nutrition and Health, ETH Zürich, Zürich, Switzerland
| | - Stephan Handschin
- Scientific Center for Optical and Electron Microscopy (ScopeM), ETH Zurich, Otto-Stern-Weg 3, 8093, Zurich, Switzerland
| | - Bing Li
- School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510640, China
| | - Lin Li
- School of Food Science and Engineering, Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510640, China
| | - Shana J Sturla
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland
| | - Collin Y Ewald
- Institute of Translational Medicine, Department of Health Sciences and Technology (HEST), ETH Zurich, Schwerzenbach, Switzerland
| | - Raffaele Mezzenga
- Institute of Food, Nutrition and Health (IFNH), Department of Health Sciences and Technology (HEST), ETH Zurich, Zürich, 8092, Switzerland.
- Department of Materials, ETH Zurich, Zürich, 8092, Switzerland.
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9
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Hakeem MJ, Khan JM, Malik A, Husain FM, Alresaini SM, Ahmad A, Alam P. Molecular insight into the modulation of ovalbumin fibrillation by allura red dye at acidic pH. Int J Biol Macromol 2023; 230:123254. [PMID: 36641020 DOI: 10.1016/j.ijbiomac.2023.123254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
The synthetic food additive dye induces amyloid fibrillation has many implications in the laboratory and industries. The effect of Allura red (AR), on the fibrillation of ovalbumin (Ova) at pH 2.0 was investigated. The influence of salt and pH was also seen on AR-induced Ova aggregation. We have used several spectroscopic and microscopy techniques to characterize the changes. The turbidity data suggest that concentrations above 0.05 mM of AR induce aggregation, and the size of aggregates increased in response to AR concentration. The kinetics data showed that the AR induces Ova aggregation quickly without lag time. The aggregates induced by AR have amyloid-like aggregates confirmed by far-UV CD and TEM. NaCl has very marginal effects in AR-induced aggregation. The turbidity results clearly state that Ova is not forming aggregates with pH above 4.0 due to electrostatic repulsion. However, Ova forms bigger aggregates in the presence of 0.5 mM AR at a pH below 4.0. These spectroscopic data suggest that the amyloid fibrillation that occurs in Ova is due to electrostatic and hydrophobic interaction. The amyloid fibrillation induced by AR dye in protein should be taken seriously for food safety purposes.
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Affiliation(s)
- Mohammed J Hakeem
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, 2460, Riyadh, 11451, Saudi Arabia
| | - Javed Masood Khan
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, 2460, Riyadh, 11451, Saudi Arabia.
| | - Ajamaluddin Malik
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, College of Food and Agricultural Sciences, King Saud University, 2460, Riyadh, 11451, Saudi Arabia
| | | | - Aqeel Ahmad
- Department of Medical Biochemistry, College of Medicine, Shaqra University, Shaqra 11961, Saudi Arabia
| | - Prawez Alam
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
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10
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Hofmaier M, Malanin M, Bittrich E, Lentz S, Urban B, Scheibel T, Fery A, Müller M. β-Sheet Structure Formation within Binary Blends of Two Spider Silk Related Peptides. Biomacromolecules 2023; 24:825-840. [PMID: 36632028 DOI: 10.1021/acs.biomac.2c01266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Intrinsically disordered proteins (IDPs) play an important role in molecular biology and medicine because their induced folding can lead to so-called conformational diseases, where β-amyloids play an important role. Still, the molecular folding process into the different substructures, such as parallel/antiparallel or extended β-sheet/crossed β-sheet is not fully understood. The recombinant spider silk protein eADF4(Cx) consisting of repeating modules C, which are composed of a crystalline (pep-c) and an amorphous peptide sequence (pep-a), can be used as a model system for IDP since it can assemble into similar structures. In this work, blend films of the pep-c and pep-a sequences were investigated to modulate the β-sheet formation by varying the molar fraction of pep-c and pep-a. Dichroic Fourier-transform infrared spectroscopy (FTIR), circular dichroism, spectroscopic ellipsometry, atomic force microscopy, and IR nanospectroscopy were used to examine the secondary structure, the formation of parallel and antiparallel β-sheets, their orientation, and the microscopic roughness and phase formation within peptide blend films upon methanol post-treatment. New insights into the formation of filament-like structures in these silk blend films were obtained. Filament-like structures could be locally assigned to β-sheet-rich structures. Further, the antiparallel or parallel character and the orientation of the formed β-sheets could be clearly determined. Finally, the ideal ratio of pep-a and pep-c sequences found in the fibroin 4 of the major ampullate silk of spiders could also be rationalized by comparing the blend and spider silk protein systems.
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Affiliation(s)
- Mirjam Hofmaier
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Hohe Strasse 6, D-01069Dresden, Germany.,Chair of Physical Chemistry of Polymeric Materials, Technical University Dresden (TUD), D-01069Dresden, Germany
| | - Mikhail Malanin
- Leibniz Institute of Polymer Research Dresden (IPF), Institute of Macromolecular Chemistry, Hohe Strasse 6, D-01069Dresden, Germany
| | - Eva Bittrich
- Leibniz Institute of Polymer Research Dresden (IPF), Institute of Macromolecular Chemistry, Hohe Strasse 6, D-01069Dresden, Germany
| | - Sarah Lentz
- Chair of Biomaterials, University of Bayreuth, Prof.-Rüdiger-Bormann-Str. 1, D-95447Bayreuth, Germany
| | - Birgit Urban
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Hohe Strasse 6, D-01069Dresden, Germany
| | - Thomas Scheibel
- Chair of Biomaterials, University of Bayreuth, Prof.-Rüdiger-Bormann-Str. 1, D-95447Bayreuth, Germany.,Bayreuther Zentrum für Kolloide und Grenzflächen (BZKG), Universität Bayreuth, Universitätsstraße 30, D-95440Bayreuth, Germany.,Bayreuther Zentrum für Molekulare Biowissenschaften (BZMB), Universität Bayreuth, Universitätsstraße 30, D-95440Bayreuth, Germany.,Bayreuther Materialzentrum (BayMAT), Universität Bayreuth, Universitätsstraße 30, D-95440Bayreuth, Germany.,Bayerisches Polymerinstitut (BPI), Universität Bayreuth, Universitätsstraße 30, D-95440Bayreuth, Germany
| | - Andreas Fery
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Hohe Strasse 6, D-01069Dresden, Germany.,Chair of Physical Chemistry of Polymeric Materials, Technical University Dresden (TUD), D-01069Dresden, Germany
| | - Martin Müller
- Institute of Physical Chemistry and Polymer Physics, Leibniz Institute of Polymer Research Dresden (IPF), Hohe Strasse 6, D-01069Dresden, Germany.,Chair of Macromolecular Chemistry, Technical University of Dresden (TUD), Mommsenstraße 4, D-01062Dresden, Germany
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11
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Housmans JAJ, Wu G, Schymkowitz J, Rousseau F. A guide to studying protein aggregation. FEBS J 2023; 290:554-583. [PMID: 34862849 DOI: 10.1111/febs.16312] [Citation(s) in RCA: 53] [Impact Index Per Article: 53.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/18/2021] [Accepted: 12/03/2021] [Indexed: 02/04/2023]
Abstract
Disrupted protein folding or decreased protein stability can lead to the accumulation of (partially) un- or misfolded proteins, which ultimately cause the formation of protein aggregates. Much of the interest in protein aggregation is associated with its involvement in a wide range of human diseases and the challenges it poses for large-scale biopharmaceutical manufacturing and formulation of therapeutic proteins and peptides. On the other hand, protein aggregates can also be functional, as observed in nature, which triggered its use in the development of biomaterials or therapeutics as well as for the improvement of food characteristics. Thus, unmasking the various steps involved in protein aggregation is critical to obtain a better understanding of the underlying mechanism of amyloid formation. This knowledge will allow a more tailored development of diagnostic methods and treatments for amyloid-associated diseases, as well as applications in the fields of new (bio)materials, food technology and therapeutics. However, the complex and dynamic nature of the aggregation process makes the study of protein aggregation challenging. To provide guidance on how to analyse protein aggregation, in this review we summarize the most commonly investigated aspects of protein aggregation with some popular corresponding methods.
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Affiliation(s)
- Joëlle A J Housmans
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Guiqin Wu
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB Center for Brain and Disease Research, Leuven, Belgium.,Switch Laboratory, Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
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12
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Mir FM, Bano B. Amyloid aggregation and secondary structure changes of liver cystatin: Acidic denaturation and TFE induced studies. J Biomol Struct Dyn 2022; 40:12506-12515. [PMID: 34488562 DOI: 10.1080/07391102.2021.1971565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A cysteine proteinase inhibitor has been purified by affinity chromatography from the liver of buffalo. Liver cystatin is subjected to incubation at low pH with co-solvent TFE, where we have studied the effect on the conformation, activity and tendency to form aggregates or fibrils. ANS fluorescence was used to study conformational changes. The fibril formation and aggregation was studied using ThT assay, CD, FTIR and fluorescence spectroscopy. At pH 3.0 there was no fibril formation though aggregates were formed but in presence of TFE fibrils appeared. At pH 2.0 and 1.0, TFE induced rapid fibril formation compared to only acid induced state as assessed by Thioflavin T (ThT) fluorescence.TFE stabilized each of the three acid induced intermediates at predenaturational concentrations (20%) and accelerated fibril formation. Solvent conditions had a profound effect on the tendency of liver cystatin to produce fibrils and aggregation.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Faisal Mustafa Mir
- Department of Biochemistry, faculty of Life Sciences, A.M.U, Aligarh, Uttar Pradesh, India.,School of Biotechnology and Graduate school of Biochemistry, Yeungnum University, Gyeongsan, South Korea
| | - Bilqees Bano
- Department of Biochemistry, faculty of Life Sciences, A.M.U, Aligarh, Uttar Pradesh, India
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13
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Arndt T, Jaudzems K, Shilkova O, Francis J, Johansson M, Laity PR, Sahin C, Chatterjee U, Kronqvist N, Barajas-Ledesma E, Kumar R, Chen G, Strömberg R, Abelein A, Langton M, Landreh M, Barth A, Holland C, Johansson J, Rising A. Spidroin N-terminal domain forms amyloid-like fibril based hydrogels and provides a protein immobilization platform. Nat Commun 2022; 13:4695. [PMID: 35970823 PMCID: PMC9378615 DOI: 10.1038/s41467-022-32093-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 07/15/2022] [Indexed: 11/24/2022] Open
Abstract
Recombinant spider silk proteins (spidroins) have multiple potential applications in development of novel biomaterials, but their multimodal and aggregation-prone nature have complicated production and straightforward applications. Here, we report that recombinant miniature spidroins, and importantly also the N-terminal domain (NT) on its own, rapidly form self-supporting and transparent hydrogels at 37 °C. The gelation is caused by NT α-helix to β-sheet conversion and formation of amyloid-like fibrils, and fusion proteins composed of NT and green fluorescent protein or purine nucleoside phosphorylase form hydrogels with intact functions of the fusion moieties. Our findings demonstrate that recombinant NT and fusion proteins give high expression yields and bestow attractive properties to hydrogels, e.g., transparency, cross-linker free gelation and straightforward immobilization of active proteins at high density. Recombinant spider silks are of interest but the multimodal and aggregation-prone nature of them is a limitation. Here, the authors report on a miniature spidroin based on the N-terminal domain which forms a hydrogel at 37 °C which allows for ease of production and fusion protein modification to generate functional biomaterials.
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Affiliation(s)
- Tina Arndt
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Kristaps Jaudzems
- Department of Physical Organic Chemistry, Latvian Institute of Organic Synthesis, Riga, LV-1006, Latvia
| | - Olga Shilkova
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Juanita Francis
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Mathias Johansson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, 750 07, Sweden, Box 7015
| | - Peter R Laity
- Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD, UK
| | - Cagla Sahin
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solnavägen 9, 171 65, Solna, Sweden
| | - Urmimala Chatterjee
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Nina Kronqvist
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Edgar Barajas-Ledesma
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solnavägen 9, 171 65, Solna, Sweden
| | - Rakesh Kumar
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Gefei Chen
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Roger Strömberg
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Axel Abelein
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Maud Langton
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, 750 07, Sweden, Box 7015
| | - Michael Landreh
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Solnavägen 9, 171 65, Solna, Sweden
| | - Andreas Barth
- Department of Biochemistry and Biophysics, The Arrhenius Laboratories for Natural Sciences, Stockholm University, 10691, Stockholm, Sweden
| | - Chris Holland
- Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD, UK
| | - Jan Johansson
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden
| | - Anna Rising
- Department of Biosciences and Nutrition, Karolinska Institutet, Neo, Blickagången 16, Huddinge, 141 52, Sweden. .,Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, 750 07, Sweden.
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14
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Siemer AB. What makes functional amyloids work? Crit Rev Biochem Mol Biol 2022; 57:399-411. [PMID: 35997712 PMCID: PMC9588633 DOI: 10.1080/10409238.2022.2113030] [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: 01/25/2022] [Revised: 06/29/2022] [Accepted: 08/10/2022] [Indexed: 01/27/2023]
Abstract
Although first described in the context of disease, cross-β (amyloid) fibrils have also been found as functional entities in all kingdoms of life. However, what are the specific properties of the cross-β fibril motif that convey biological function, make them especially suited for their particular purpose, and distinguish them from other fibrils found in biology? This review approaches these questions by arguing that cross-β fibrils are highly periodic, stable, and self-templating structures whose formation is accompanied by substantial conformational change that leads to a multimerization of their core and framing sequences. A discussion of each of these properties is followed by selected examples of functional cross-β fibrils that show how function is usually achieved by leveraging many of these properties.
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Affiliation(s)
- Ansgar B Siemer
- Department of Physiology and Neuroscience, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
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15
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de Eguileor M, Grimaldi A, Pulze L, Acquati F, Morsiani C, Capri M. Amyloid fil rouge from invertebrate up to human ageing: a focus on Alzheimer Disease. Mech Ageing Dev 2022; 206:111705. [DOI: 10.1016/j.mad.2022.111705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 06/29/2022] [Accepted: 07/02/2022] [Indexed: 10/17/2022]
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16
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Paschold A, Voigt B, Hause G, Kohlmann T, Rothemund S, Binder WH. Modulating the Fibrillization of Parathyroid-Hormone (PTH) Peptides: Azo-Switches as Reversible and Catalytic Entities. Biomedicines 2022; 10:biomedicines10071512. [PMID: 35884817 PMCID: PMC9313110 DOI: 10.3390/biomedicines10071512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 11/16/2022] Open
Abstract
We here report a novel strategy to control the bioavailability of the fibrillizing parathyroid hormone (PTH)-derived peptides, where the concentration of the bioactive form is controlled by an reversible, photoswitchable peptide. PTH1–84, a human hormone secreted by the parathyroid glands, is important for the maintenance of extracellular fluid calcium and phosphorus homeostasis. Controlling fibrillization of PTH1–84 represents an important approach for in vivo applications, in view of the pharmaceutical applications for this protein. We embed the azobenzene derivate 3-{[(4-aminomethyl)phenyl]diazenyl}benzoic acid (3,4′-AMPB) into the PTH-derived peptide PTH25–37 to generate the artificial peptide AzoPTH25–37 via solid-phase synthesis. AzoPTH25–37 shows excellent photostability (more than 20 h in the dark) and can be reversibly photoswitched between its cis/trans forms. As investigated by ThT-monitored fibrillization assays, the trans-form of AzoPTH25–37 fibrillizes similar to PTH25–37, while the cis-form of AzoPTH25–37 generates only amorphous aggregates. Additionally, cis-AzoPTH25–37 catalytically inhibits the fibrillization of PTH25–37 in ratios of up to one-fifth. The approach reported here is designed to control the concentration of PTH-peptides, where the bioactive form can be catalytically controlled by an added photoswitchable peptide.
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Affiliation(s)
- André Paschold
- Department of Chemistry, Faculty of Natural Sciences II, Martin-Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (A.P.); (T.K.)
| | - Bruno Voigt
- Department of Physics, Faculty of Natural Sciences II, Martin-Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany;
| | - Gerd Hause
- Biozentrum, Martin-Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany;
| | - Tim Kohlmann
- Department of Chemistry, Faculty of Natural Sciences II, Martin-Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (A.P.); (T.K.)
| | - Sven Rothemund
- Core Unit Peptide—Technologies, University Leipzig, 04103 Leipzig, Germany;
| | - Wolfgang H. Binder
- Department of Chemistry, Faculty of Natural Sciences II, Martin-Luther University Halle-Wittenberg, 06120 Halle (Saale), Germany; (A.P.); (T.K.)
- Correspondence:
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17
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Arndt T, Greco G, Schmuck B, Bunz J, Shilkova O, Francis J, Pugno NM, Jaudzems K, Barth A, Johansson J, Rising A. Engineered Spider Silk Proteins for Biomimetic Spinning of Fibers with Toughness Equal to Dragline Silks. ADVANCED FUNCTIONAL MATERIALS 2022; 32:2200986. [PMID: 36505976 PMCID: PMC9720699 DOI: 10.1002/adfm.202200986] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/10/2022] [Indexed: 06/17/2023]
Abstract
Spider silk is the toughest fiber found in nature, and bulk production of artificial spider silk that matches its mechanical properties remains elusive. Development of miniature spider silk proteins (mini-spidroins) has made large-scale fiber production economically feasible, but the fibers' mechanical properties are inferior to native silk. The spider silk fiber's tensile strength is conferred by poly-alanine stretches that are zipped together by tight side chain packing in β-sheet crystals. Spidroins are secreted so they must be void of long stretches of hydrophobic residues, since such segments get inserted into the endoplasmic reticulum membrane. At the same time, hydrophobic residues have high β-strand propensity and can mediate tight inter-β-sheet interactions, features that are attractive for generation of strong artificial silks. Protein production in prokaryotes can circumvent biological laws that spiders, being eukaryotic organisms, must obey, and the authors thus design mini-spidroins that are predicted to more avidly form stronger β-sheets than the wildtype protein. Biomimetic spinning of the engineered mini-spidroins indeed results in fibers with increased tensile strength and two fiber types display toughness equal to native dragline silks. Bioreactor expression and purification result in a protein yield of ≈9 g L-1 which is in line with requirements for economically feasible bulk scale production.
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Affiliation(s)
- Tina Arndt
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
| | - Gabriele Greco
- Laboratory for Bioinspired, Bionic, Nano, Meta, Materials & MechanicsDepartment of Civil, Environmental and Mechanical EngineeringUniversity of TrentoVia Mesiano 77Trento38123Italy
- Department of AnatomyPhysiology and BiochemistrySwedish University of Agricultural SciencesUppsala75007Sweden
| | - Benjamin Schmuck
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
- Department of AnatomyPhysiology and BiochemistrySwedish University of Agricultural SciencesUppsala75007Sweden
| | - Jessica Bunz
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
- Present address:
Spiber Technologies ABAlbaNova University CenterSE‐10691StockholmSweden
| | - Olga Shilkova
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
| | - Juanita Francis
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
| | - Nicola M Pugno
- Laboratory for Bioinspired, Bionic, Nano, Meta, Materials & MechanicsDepartment of Civil, Environmental and Mechanical EngineeringUniversity of TrentoVia Mesiano 77Trento38123Italy
- School of Engineering and Materials SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK
| | - Kristaps Jaudzems
- Department of Physical Organic ChemistryLatvian Institute of Organic SynthesisRigaLV‐1006Latvia
| | - Andreas Barth
- Department of Biochemistry and BiophysicsThe Arrhenius Laboratories for Natural SciencesStockholm UniversityStockholm10691Sweden
| | - Jan Johansson
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
| | - Anna Rising
- Department of Biosciences and NutritionKarolinska InstitutetNeoHuddinge14183Sweden
- Department of AnatomyPhysiology and BiochemistrySwedish University of Agricultural SciencesUppsala75007Sweden
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18
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Chan NJ, Lentz S, Gurr PA, Scheibel T, Qiao GG. Mimicry of silk utilizing synthetic polypeptides. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Secondary structure of peptides mimicking the Gly-rich regions of major ampullate spidroin protein 1 and 2. Biophys Chem 2022; 284:106783. [DOI: 10.1016/j.bpc.2022.106783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/07/2022] [Accepted: 02/17/2022] [Indexed: 11/17/2022]
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20
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Gasymov OK, Mammedzade AM, Bakhishova MJ, Guliyeva AJ, Ragona L, Molinari H. Sodium fusidate prevents protein aggregation of silk fibroin and offers new perspectives for human lens material disaggregation. Biophys Chem 2021; 279:106680. [PMID: 34537590 DOI: 10.1016/j.bpc.2021.106680] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/02/2021] [Accepted: 09/06/2021] [Indexed: 01/30/2023]
Abstract
Silk fibroin (SF) is a non-pathological amyloidogenic protein prone, in solution, to the formation of amyloid-like aggregated species, displaying similarities in fibrillation kinetics with pathological amyloids, as widely reported in the literature. We show here, on the basis of different biophysical approaches (turbidity, Congo Red assays, CD, DLS and fluorescence), that fusidic acid (FA), a well-known antibiotic, acts on SF as an anti-aggregating agent in a dose-dependent manner, being also able to revert SF aggregation. FA binds to SF inducing changes in the environment of SF aromatic residues. We further provide the proof of principle that FA, already approved as drug on humans and used in ophthalmic preparations, displays its anti-aggregation properties also on lens material derived from cataract surgery and is capable of reducing aggregation. Thus it is suggested that FA can be foreseen as a therapeutic treatment for cataract and other protein aggregation disorders.
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Affiliation(s)
- Oktay K Gasymov
- Institute of Biophysics of ANAS, 117 Z. Khalilov, AZ-1141 Baku, Azerbaijan.
| | - Aida M Mammedzade
- Institute of Biophysics of ANAS, 117 Z. Khalilov, AZ-1141 Baku, Azerbaijan
| | | | - Aytaj J Guliyeva
- Institute of Biophysics of ANAS, 117 Z. Khalilov, AZ-1141 Baku, Azerbaijan
| | - Laura Ragona
- Istituto di Scienze e Tecnologie Chimiche (SCITEC), CNR, via Corti 12, 20133 Milano, Italy.
| | - Henriette Molinari
- Istituto di Scienze e Tecnologie Chimiche (SCITEC), CNR, via Corti 12, 20133 Milano, Italy
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21
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Prabakaran R, Rawat P, Kumar S, Gromiha MM. Evaluation of in silico tools for the prediction of protein and peptide aggregation on diverse datasets. Brief Bioinform 2021; 22:6309925. [PMID: 34181000 DOI: 10.1093/bib/bbab240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/18/2021] [Accepted: 06/02/2021] [Indexed: 01/09/2023] Open
Abstract
Several prediction algorithms and tools have been developed in the last two decades to predict protein and peptide aggregation. These in silico tools aid to predict the aggregation propensity and amyloidogenicity as well as the identification of aggregation-prone regions. Despite the immense interest in the field, it is of prime importance to systematically compare these algorithms for their performance. In this review, we have provided a rigorous performance analysis of nine prediction tools using a variety of assessments. The assessments were carried out on several non-redundant datasets ranging from hexapeptides to protein sequences as well as amyloidogenic antibody light chains to soluble protein sequences. Our analysis reveals the robustness of the current prediction tools and the scope for improvement in their predictive performances. Insights gained from this work provide critical guidance to the scientific community on advantages and limitations of different aggregation prediction methods and make informed decisions about their research needs.
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Affiliation(s)
| | | | - Sandeep Kumar
- Department of Biotherapeutics Discovery in Boehringer-Ingelheim Pharmaceutical Inc., Ridgefield, CT, USA
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22
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Kumar V, Sinha N, Thakur AK. Necessity of regulatory guidelines for the development of amyloid based biomaterials. Biomater Sci 2021; 9:4410-4422. [PMID: 34018497 DOI: 10.1039/d1bm00059d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Amyloid diseases are caused due to protein homeostasis failure where incorrectly folded proteins/peptides form cross-β-sheet rich amyloid fibrillar structures. Besides proteins/peptides, small metabolite assemblies also exhibit amyloid-like features. These structures are linked to several human and animal diseases. In addition, non-toxic amyloids with diverse physiological roles are characterized as a new functional class. This finding, along with the unique properties of amyloid like stability and mechanical strength, led to a surge in the development of amyloid-based biomaterials. However, the usage of these materials by humans and animals may pose a health risk such as the development of amyloid diseases and toxicity. This is possible because amyloid-based biomaterials and their fragments may assist seeding and cross-seeding mechanisms of amyloid formation in the body. This review summarizes the potential uses of amyloids as biomaterials, the concerns regarding their usage, and a prescribed workflow to initiate a regulatory approach.
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Affiliation(s)
- Vijay Kumar
- Department of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Nabodita Sinha
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, UP-208016, India.
| | - Ashwani Kumar Thakur
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, UP-208016, India.
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23
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Stellwagen SD, Burns M. Repeat variation resolves a complete aggregate silk sequence of bolas spider Mastophora phrynosoma. Integr Comp Biol 2021; 61:1450-1458. [PMID: 33944935 DOI: 10.1093/icb/icab048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Many species of spider use a modified silk adhesive, called aggregate glue, to aid in prey capture. Aggregate spidroins (spider fibroins) are modified members of the spider silk family, however they are not spun into fibers as are their solid silk relatives. The genes that encode for aggregate spidroins are the largest of the known spidroin genes and are similarly highly repetitive. In this study, we used long read sequencing to discover the aggregate spidroin genes of the toad-like bolas spider, Mastophora phrynosoma, which employs the glue in a unique way, using only a single, large droplet to capture moths. While Aggregate Spidroin 1 (AgSp1) remains incomplete, AgSp2 is more than an extraordinary 62 kilobases of coding sequence, 20 kb longer than the longest spidroin on record. The structure of repeats from both aggregate silk proteins follows a similar pattern seen in other species, with the same strict conservation of amino acid residue number for much of the repeats' lengths. Interestingly, AgSp2 lacks the elevated number and groupings of glutamine residues seen in the other reported AgSp2 of a classic orb weaving species. The role of gene length in glue functionality remains a mystery, and thus discovering length differences across species will allow understanding and harnessing of this attribute for the next generation of bio-inspired adhesives.
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Affiliation(s)
- Sarah D Stellwagen
- Department of Biological Sciences, UNC Charlotte, 9201, University City Blvd, NC 28223, USA
| | - Mercedes Burns
- Department of Biological Sciences, University of Maryland, Baltimore County, 1000 Hilltop Circle, MD 21250, USA
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24
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Yakupova EI, Bobyleva LG, Shumeyko SA, Vikhlyantsev IM, Bobylev AG. Amyloids: The History of Toxicity and Functionality. BIOLOGY 2021; 10:biology10050394. [PMID: 34062910 PMCID: PMC8147320 DOI: 10.3390/biology10050394] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 12/15/2022]
Abstract
Proteins can perform their specific function due to their molecular structure. Partial or complete unfolding of the polypeptide chain may lead to the misfolding and aggregation of proteins in turn, resulting in the formation of different structures such as amyloid aggregates. Amyloids are rigid protein aggregates with the cross-β structure, resistant to most solvents and proteases. Because of their resistance to proteolysis, amyloid aggregates formed in the organism accumulate in tissues, promoting the development of various diseases called amyloidosis, for instance Alzheimer's diseases (AD). According to the main hypothesis, it is considered that the cause of AD is the formation and accumulation of amyloid plaques of Aβ. That is why Aβ-amyloid is the most studied representative of amyloids. Therefore, in this review, special attention is paid to the history of Aβ-amyloid toxicity. We note the main problems with anti-amyloid therapy and write about new views on amyloids that can play positive roles in the different organisms including humans.
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Affiliation(s)
- Elmira I. Yakupova
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow, Russia; (L.G.B.); (S.A.S.); (I.M.V.); (A.G.B.)
- A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119991 Moscow, Russia
- Correspondence: ; Tel.: +7-(985)687-77-27
| | - Liya G. Bobyleva
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow, Russia; (L.G.B.); (S.A.S.); (I.M.V.); (A.G.B.)
| | - Sergey A. Shumeyko
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow, Russia; (L.G.B.); (S.A.S.); (I.M.V.); (A.G.B.)
| | - Ivan M. Vikhlyantsev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow, Russia; (L.G.B.); (S.A.S.); (I.M.V.); (A.G.B.)
| | - Alexander G. Bobylev
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290 Moscow, Russia; (L.G.B.); (S.A.S.); (I.M.V.); (A.G.B.)
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25
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Identification of critical amino acid residues in the regulatory N-terminal domain of PMEL. Sci Rep 2021; 11:7730. [PMID: 33833328 PMCID: PMC8032716 DOI: 10.1038/s41598-021-87259-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 03/26/2021] [Indexed: 01/22/2023] Open
Abstract
The pigment cell-specific protein PMEL forms a functional amyloid matrix in melanosomes onto which the pigment melanin is deposited. The amyloid core consists of a short proteolytic fragment, which we have termed the core-amyloid fragment (CAF) and perhaps additional parts of the protein, such as the PKD domain. A highly O-glycosylated repeat (RPT) domain also derived from PMEL proteolysis associates with the amyloid and is necessary to establish the sheet-like morphology of the assemblies. Excluded from the aggregate is the regulatory N-terminus, which nevertheless must be linked in cis to the CAF in order to drive amyloid formation. The domain is then likely cleaved away immediately before, during, or immediately after the incorporation of a new CAF subunit into the nascent amyloid. We had previously identified a 21 amino acid long region, which mediates the regulatory activity of the N-terminus towards the CAF. However, many mutations in the respective segment caused misfolding and/or blocked PMEL export from the endoplasmic reticulum, leaving their phenotype hard to interpret. Here, we employ a saturating mutagenesis approach targeting the motif at single amino acid resolution. Our results confirm the critical nature of the PMEL N-terminal region and identify several residues essential for PMEL amyloidogenesis.
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26
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Functional Amyloids Are the Rule Rather Than the Exception in Cellular Biology. Microorganisms 2020; 8:microorganisms8121951. [PMID: 33316961 PMCID: PMC7764130 DOI: 10.3390/microorganisms8121951] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 11/28/2020] [Accepted: 12/04/2020] [Indexed: 12/15/2022] Open
Abstract
Amyloids are a class of protein aggregates that have been historically characterized by their relationship with human disease. Indeed, amyloids can be the result of misfolded proteins that self-associate to form insoluble, extracellular plaques in diseased tissue. For the first 150 years of their study, the pathogen-first definition of amyloids was sufficient. However, new observations of amyloids foster an appreciation for non-pathological roles for amyloids in cellular systems. There is now evidence from all domains of life that amyloids can be non-pathogenic and functional, and that their formation can be the result of purposeful and controlled cellular processes. So-called functional amyloids fulfill an assortment of biological functions including acting as structural scaffolds, regulatory mechanisms, and storage mechanisms. The conceptual convergence of amyloids serving a functional role has been repeatedly confirmed by discoveries of additional functional amyloids. With dozens already known, and with the vigorous rate of discovery, the biology of amyloids is robustly represented by non-pathogenic amyloids.
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27
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Stepanenko OV, Sulatsky MI, Mikhailova EV, Stepanenko OV, Povarova OI, Kuznetsova IM, Turoverov KK, Sulatskaya AI. Alpha-B-Crystallin Effect on Mature Amyloid Fibrils: Different Degradation Mechanisms and Changes in Cytotoxicity. Int J Mol Sci 2020; 21:ijms21207659. [PMID: 33081200 PMCID: PMC7589196 DOI: 10.3390/ijms21207659] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/10/2020] [Accepted: 10/13/2020] [Indexed: 12/11/2022] Open
Abstract
Given the ability of molecular chaperones and chaperone-like proteins to inhibit the formation of pathological amyloid fibrils, the chaperone-based therapy of amyloidosis has recently been proposed. However, since these diseases are often diagnosed at the stages when a large amount of amyloids is already accumulated in the patient’s body, in this work we pay attention to the undeservedly poorly studied problem of chaperone and chaperone-like proteins’ effect on mature amyloid fibrils. We showed that a heat shock protein alpha-B-crystallin, which is capable of inhibiting fibrillogenesis and is found in large quantities as a part of amyloid plaques, can induce degradation of mature amyloids by two different mechanisms. Under physiological conditions, alpha-B-crystallin induces fluffing and unweaving of amyloid fibrils, which leads to a partial decrease in their structural ordering without lowering their stability and can increase their cytotoxicity. We found a higher correlation between the rate and effectiveness of amyloids degradation with the size of fibrils clusters rather than with amino acid sequence of amyloidogenic protein. Some external effects (such as an increase in medium acidity) can lead to a change in the mechanism of fibrils degradation induced by alpha-B-crystallin: amyloid fibers are fragmented without changing their secondary structure and properties. According to recent data, fibrils cutting can lead to the generation of seeds for new bona fide amyloid fibrils and accelerate the accumulation of amyloids, as well as enhance the ability of fibrils to disrupt membranes and to reduce cell viability. Our results emphasize the need to test the chaperone effect not only on fibrillogenesis, but also on the mature amyloid fibrils, including stress conditions, in order to avoid undesirable disease progression during chaperone-based therapy.
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Affiliation(s)
- Olga V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - M. I. Sulatsky
- Laboratory of Cell Morphology, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia;
| | - E. V. Mikhailova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - Olesya V. Stepanenko
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - O. I. Povarova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - I. M. Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
| | - K. K. Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
- Peter the Great St.-Petersburg Polytechnic University, Polytechnicheskaya 29, 195251 St. Petersburg, Russia
- Correspondence: ; Tel.: +7-812-297-19-57
| | - A. I. Sulatskaya
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology, Russian Academy of Sciences, 4 Tikhoretsky ave., 194064 St. Petersburg, Russia; (O.V.S.); (E.V.M.); (O.V.S.); (O.I.P.); (I.M.K.); (A.I.S.)
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28
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Sarkar A, Edson C, Tian D, Fink TD, Cianciotti K, Gross RA, Bae C, Zha RH. Rapid Synthesis of Silk-Like Polymers Facilitated by Microwave Irradiation and Click Chemistry. Biomacromolecules 2020; 22:95-105. [PMID: 32902261 DOI: 10.1021/acs.biomac.0c00563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Silk is a natural fiber that surpasses most man-made polymers in its combination of strength and toughness. Silk fibroin, the primary protein component of silk, can be synthetically mimicked by a linear copolymer with alternating rigid and soft segments. Strategies for chemical synthesis of such silk-like polymers have persistently resulted in poor sequence control, long reaction times, and low molecular weights. Here, we present a two-stage approach for rapidly synthesizing silk-like polymers with precisely defined rigid blocks. This approach utilizes solid-phase peptide synthesis to create uniform oligoalanine "prepolymers", followed by microwave-assisted step-growth polymerization with bifunctional poly(ethylene glycol). Multiple coupling chemistries and reaction conditions were explored, with microwave-assisted click chemistry yielding polymers with Mw ∼ 14 kg/mol in less than 20 min. These polymers formed antiparallel β-sheets and nanofibers, which is consistent with the structure of natural silk fibroin. Thus, our strategy demonstrates a promising modular approach for synthesizing silk-like polymers.
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Affiliation(s)
- Amrita Sarkar
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Cody Edson
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Ding Tian
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Tanner D Fink
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Katherine Cianciotti
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Richard A Gross
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.,Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Chulsung Bae
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States.,Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - R Helen Zha
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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29
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Kiseleva AP, Krivoshapkin PV, Krivoshapkina EF. Recent Advances in Development of Functional Spider Silk-Based Hybrid Materials. Front Chem 2020; 8:554. [PMID: 32695749 PMCID: PMC7338834 DOI: 10.3389/fchem.2020.00554] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/29/2020] [Indexed: 01/10/2023] Open
Abstract
Silkworm silk is mainly known as a luxurious textile. Spider silk is an alternative to silkworm silk fibers and has much more outstanding properties. Silk diversity ensures variation in its application in nature and industry. This review aims to provide a critical summary of up-to-date fabrication methods of spider silk-based organic-inorganic hybrid materials. This paper focuses on the relationship between the molecular structure of spider silk and its mechanical properties. Such knowledge is essential for understanding the innate properties of spider silk as it provides insight into the sophisticated assembly processes of silk proteins into the distinct polymers as a basis for novel products. In this context, we describe the development of spider silk-based hybrids using both natural and bioengineered spider silk proteins blended with inorganic nanoparticles. The following topics are also covered: the diversity of spider silk, its composition and architecture, the differences between silkworm silk and spider silk, and the biosynthesis of natural silk. Referencing biochemical data and processes, this paper outlines the existing challenges and future outcomes.
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Affiliation(s)
| | | | - Elena F. Krivoshapkina
- Laboratory of Solution Chemistry of Advanced Materials and Technologies, ITMO University, St. Petersburg, Russia
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30
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Functional amyloids of eukaryotes: criteria, classification, and biological significance. Curr Genet 2020; 66:849-866. [DOI: 10.1007/s00294-020-01079-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/16/2020] [Accepted: 04/20/2020] [Indexed: 11/26/2022]
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31
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Sulatsky MI, Sulatskaya AI, Stepanenko OV, Povarova OI, Kuznetsova IM, Turoverov KK. Denaturant effect on amyloid fibrils: Declasterization, depolymerization, denaturation and reassembly. Int J Biol Macromol 2020; 150:681-694. [PMID: 32057863 DOI: 10.1016/j.ijbiomac.2020.01.290] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 01/07/2023]
Abstract
Accumulation of amyloid fibrils in organism accompanies many serious diseases, such as Alzheimer's and Parkinson's diseases, diabetes, prion diseases, etc. It is generally accepted that amyloids are highly resistant to degradation, which complicates their elimination in vivo and is one of the reasons for their pathogenicity. However, using a wide range of physicochemical approaches and specially elaborated method for the tested samples preparation by equilibrium microdialysis technique, it is proved that the stability of amyloids is greatly exaggerated. It turned out that amyloid fibrils formed from at least two amyloidogenic proteins, one of which is a model object for fibrils studying and the second is the cause of hemodialysis amyloidosis in an acute renal failure, are less stable than monomeric proteins. A mechanism of the degradation/reassembly of amyloid fibrils was proposed. It was shown that amyloid «seed» is a factor affecting not only the rate of the fibrils formation, but also their structure. Obtained results are a step towards identifying effects that can lead to degradation of amyloids and their clearance without adverse influence on the functionally active state of the protein or to change the structure and, as a result, the pathogenicity of these protein aggregates.
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Affiliation(s)
- M I Sulatsky
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia
| | - A I Sulatskaya
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia
| | - Olga V Stepanenko
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia
| | - O I Povarova
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia
| | - I M Kuznetsova
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia
| | - K K Turoverov
- Institute of Cytology Russian Academy of Science, St. Petersburg, Tikhoretsky ave. 4, 194064, Russia; Peter the Great St.-Petersburg Polytechnic University, St. Petersburg, Polytechnicheskaya 29, 195251, Russia.
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32
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Sulatsky MI, Sulatskaya AI, Povarova OI, Antifeeva IA, Kuznetsova IM, Turoverov KK. Effect of the fluorescent probes ThT and ANS on the mature amyloid fibrils. Prion 2020; 14:67-75. [PMID: 32008441 PMCID: PMC7009331 DOI: 10.1080/19336896.2020.1720487] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Fluorescent probes thioflavin T (ThT) and 1-anilino-8-naphthalene sulfonate (ANS) are widely used to study amyloid fibrils that accumulate in the body of patients with serious diseases, such as Alzheimer’s, Parkinson’s, prion diseases, etc. However, the possible effect of these probes on amyloid fibrils is not well understood. In this work, we investigated the photophysical characteristics, structure, and morphology of mature amyloid fibrils formed from two model proteins, insulin and lysozyme, in the presence of ThT and ANS. It turned out that ANS affects the secondary structure of amyloids (shown for fibrils formed from insulin and lysozyme) and their fibers clusterization (valid for lysozyme fibrils), while ThT has no such effects. These results confirm the differences in the mechanisms of these dyes interaction with amyloid fibrils. Observed effect of ANS was explained by the electrostatic interactions between the dye molecule and cationic groups of amyloid-forming proteins (unlike hydrophobic binding of ThT) that induce amyloids conformational changes. This interaction leads to weakening repulsion between positive charges of amyloid fibrils and can promote their clusterization. It was shown that when fibrillogenesis conditions and, consequently, fibrils structure is changing, as well as during defragmentation of amyloids by ultrasonication, the influence of ANS to amyloids does not change, which indicates the universality of the detected effects. Based on the obtained results, it was concluded that ANS should be used cautiously for the study of amyloid fibrils, since this fluorescence probe have a direct effect on the object of study.
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Affiliation(s)
- M I Sulatsky
- Laboratory of Cell Morphology, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia
| | - A I Sulatskaya
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia
| | - O I Povarova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia
| | - Iu A Antifeeva
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia
| | - I M Kuznetsova
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia
| | - K K Turoverov
- Laboratory of Structural Dynamics, Stability and Folding of Proteins, Institute of Cytology Russian Academy of Science, St. Petersburg, Russia.,Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia
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33
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Tilbury MA, McCarthy S, Domagalska M, Ederth T, Power AM, Wall JG. The expression and characterization of recombinant cp19k barnacle cement protein from Pollicipes pollicipes. Philos Trans R Soc Lond B Biol Sci 2019; 374:20190205. [PMID: 31495308 DOI: 10.1098/rstb.2019.0205] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Adhesive proteins of barnacle cement have potential as environmentally friendly adhesives owing to their ability to adhere to various substrates in aqueous environments. By understanding the taxonomic breath of barnacles with different lifestyles, we may uncover commonalities in adhesives produced by these specialized organisms. The 19 kDa cement protein (cp19k) of the stalked barnacle Pollicipes pollicipes was expressed in Escherichia coli BL21 to investigate its adhesive properties. Initial expression of hexahistidine-tagged protein (rPpolcp19k-his) yielded low levels of insoluble protein. Co-overproduction of E. coli molecular chaperones GroEL-GroES and trigger factor (TF) increased soluble protein yields, although TF co-purified with the target protein (TF-rPpolcp19k-his). Surface coat analysis revealed high levels of adsorption of the TF-rPpolcp19k-his complex and of purified E. coli TF on both hydrophobic and hydrophilic surfaces, while low levels of adsorption were observed for rPpolcp19k-his. Tag-free rPpolcp19k protein also exhibited low adsorption compared to fibrinogen and Cell-Tak controls on hydrophobic, neutral hydrophilic and charged self-assembled monolayers under surface plasmon resonance assay conditions designed to mimic the barnacle cement gland or seawater. Because rPpolcp19k protein displays low adhesive capability, this protein is suggested to confer the ability to self-assemble into a plaque within the barnacle cement complex. This article is part of the theme issue 'Transdisciplinary approaches to the study of adhesion and adhesives in biological systems'.
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Affiliation(s)
- Maura A Tilbury
- Microbiology, School of Natural Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland.,Centre for Research in Medical Devices (CÚRAM), School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Sean McCarthy
- Ryan Institute, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Magdalena Domagalska
- Microbiology, School of Natural Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Thomas Ederth
- Division of Molecular Physics, IFM, Linköping University, 581 83 Linköping, Sweden
| | - Anne Marie Power
- Ryan Institute, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - J Gerard Wall
- Microbiology, School of Natural Sciences, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland.,Centre for Research in Medical Devices (CÚRAM), School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
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34
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Samui S, Biswas S, Roy K, Deb I, Naskar J. Engineering of Supramolecular β-Sheet and Nontoxic Amyloid Fibrils from Synthetic Oligopeptides Containing γ-Aminobutyric Acid as the N-Terminal Residue. ACS Chem Neurosci 2019; 10:2915-2918. [PMID: 31082196 DOI: 10.1021/acschemneuro.9b00119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Here we demonstrate that three synthetic tripeptides containing conformationally flexible γ-aminobutyric acid (γ-Abu) as the N-terminal residue form supramolecular β-sheet and nanofibrillar aggregates upon self-association in aqueous medium. Congo red and thioflavin T binding study establish that these nanofibrillar aggregates are amyloidogenic in nature. The MTT cell survival assay suggests that these amyloid-like nanofibrillar aggregates are nontoxic toward cultured Neuro 2A cells. Interestingly, none of these tripeptides bear sequence identity with any amyloid forming proteins or peptides; however upon self-association, they form supramolecular β-sheet and amyloid-like nanofibrils those are nontoxic in nature. The results highlight the self-assembling nature of the conformationally flexible peptides in aqueous environment and support the hypothesis that amyloid formation is the intrinsic property of the polypeptide chain. Also the cytotoxicity is not predictive from amyloid fibril formation alone. Such nontoxic amyloid fibrils can be exploited in future to design functional biomaterials for various biomedical applications.
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Affiliation(s)
- Satyabrata Samui
- Department of Biochemistry & Biophysics, University of Kalyani, Nadia, WB 741235, India
| | - Soumi Biswas
- Department of Biochemistry & Biophysics, University of Kalyani, Nadia, WB 741235, India
| | - Kaninika Roy
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Rd., Kolkata, 700019, India
| | - Ishani Deb
- Department of Biochemistry, University of Calcutta, 35, Ballygunge Circular Rd., Kolkata, 700019, India
| | - Jishu Naskar
- Department of Biochemistry & Biophysics, University of Kalyani, Nadia, WB 741235, India
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35
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Rasmussen CB, Christiansen G, Vad BS, Lynggaard C, Enghild JJ, Andreasen M, Otzen D. Imperfect repeats in the functional amyloid protein FapC reduce the tendency to fragment during fibrillation. Protein Sci 2019; 28:633-642. [PMID: 30592554 DOI: 10.1002/pro.3566] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 12/25/2018] [Accepted: 12/26/2018] [Indexed: 12/14/2022]
Abstract
Functional amyloid (FA) is widespread in bacteria and serves multiple purposes such as strengthening of biofilm and contact with eukaryotic hosts. Unlike pathological amyloid, FA has been subjected to evolutionary optimization which is likely to be reflected in the aggregation mechanism. FA from different bacteria, including Escherichia coli (CsgA) and Pseudomonas (FapC), contains a number of imperfect repeats which may be key to efficient aggregation. Here we report on the aggregative behavior of FapC constructs which represent all single, double, and triple deletions of the protein's three imperfect repeats. Analysis of the fibrillation kinetics by the program Amylofit reveals that the removal of these repeats increases the tendency of the growing fibrils to fragment and also generally increases aggregation half-times. Remarkably, even the mutant lacking all three repeats was able to fibrillate, although fibrillation was much more irregular and led to significantly altered and destabilized fibrils. We conclude that imperfect repeats can promote fibrillation efficiency thanks to their modular design, though the context of the imperfect repeats also plays a significant role.
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Affiliation(s)
- Casper B Rasmussen
- Interdisciplinary Nanoscience Centre, Aarhus University, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | | | - Brian S Vad
- Interdisciplinary Nanoscience Centre, Aarhus University, Aarhus, Denmark
| | - Carina Lynggaard
- Interdisciplinary Nanoscience Centre, Aarhus University, Aarhus, Denmark
| | - Jan J Enghild
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Maria Andreasen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Daniel Otzen
- Interdisciplinary Nanoscience Centre, Aarhus University, Aarhus, Denmark.,Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
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36
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Nanostructured, Self-Assembled Spider Silk Materials for Biomedical Applications. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1174:187-221. [PMID: 31713200 DOI: 10.1007/978-981-13-9791-2_6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The extraordinary mechanical properties of spider silk fibers result from the interplay of composition, structure and self-assembly of spider silk proteins (spidroins). Genetic approaches enabled the biotechnological production of recombinant spidroins which have been employed to unravel the self-assembly and spinning process. Various processing conditions allowed to explore non-natural morphologies including nanofibrils, particles, capsules, hydrogels, films or foams. Recombinant spider silk proteins and materials made thereof can be utilized for biomedical applications, such as drug delivery, tissue engineering or 3D-biomanufacturing.
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37
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McGill M, Holland GP, Kaplan DL. Experimental Methods for Characterizing the Secondary Structure and Thermal Properties of Silk Proteins. Macromol Rapid Commun 2019; 40:e1800390. [PMID: 30073740 PMCID: PMC6425979 DOI: 10.1002/marc.201800390] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 06/16/2018] [Indexed: 12/17/2022]
Abstract
Silk proteins are biopolymers produced by spinning organisms that have been studied extensively for applications in materials engineering, regenerative medicine, and devices due to their high tensile strength and extensibility. This remarkable combination of mechanical properties arises from their unique semi-crystalline secondary structure and block copolymer features. The secondary structure of silks is highly sensitive to processing, and can be manipulated to achieve a wide array of material profiles. Studying the secondary structure of silks is therefore critical to understanding the relationship between structure and function, the strength and stability of silk-based materials, and the natural fiber synthesis process employed by spinning organisms. However, silks present unique challenges to structural characterization due to high-molecular-weight protein chains, repetitive sequences, and heterogeneity in intra- and interchain domain sizes. Here, experimental techniques used to study the secondary structure of silks, the information attainable from these techniques, and the limitations associated with them are reviewed. Ultimately, the appropriate utilization of a suite of techniques discussed here will enable detailed characterization of silk-based materials, from studying fundamental processing-structure-function relationships to developing commercially useful quality control assessments.
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Affiliation(s)
- Meghan McGill
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Gregory P. Holland
- Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182-1030, USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
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38
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Muiznieks LD, Sharpe S, Pomès R, Keeley FW. Role of Liquid–Liquid Phase Separation in Assembly of Elastin and Other Extracellular Matrix Proteins. J Mol Biol 2018; 430:4741-4753. [DOI: 10.1016/j.jmb.2018.06.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/29/2018] [Accepted: 06/01/2018] [Indexed: 10/14/2022]
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39
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Cámara-Almirón J, Caro-Astorga J, de Vicente A, Romero D. Beyond the expected: the structural and functional diversity of bacterial amyloids. Crit Rev Microbiol 2018; 44:653-666. [PMID: 30354913 DOI: 10.1080/1040841x.2018.1491527] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Intense research has confirmed the formerly theoretical distribution of amyloids in nature, and studies on different systems have illustrated the role of these proteins in microbial adaptation and in interactions with the environment. Two lines of research are expanding our knowledge on functional amyloids: (i) structural studies providing insights into the molecular machineries responsible for the transition from monomer to fibers and (ii) studies showing the way in which these proteins might participate in the microbial fitness in natural settings. Much is known about how amyloids play a role in the social behavior of bacteria, or biofilm formation, and in the adhesion of bacteria to surfaces; however, we are still in the initial stages of understanding a complementary involvement of amyloids in bacteria-host interactions. This review will cover the following two topics: first, the key aspects of the microbial platforms dedicated to the assembly of the fibers, and second, the mechanisms by which bacteria utilize the morphological and biochemical variability of amyloids to modulate the immunological response of the host, plants and humans, contributing to (i) infection, in the case of pathogenic bacteria or (ii) promotion of the health of the host, in the case of beneficial bacteria.
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Affiliation(s)
- Jesús Cámara-Almirón
- a Instituto de Hortofruticultura Subtropical y Mediterránea ''La Mayora'' - Departamento de Microbiología , Universidad de Málaga , Málaga , Spain
| | - Joaquin Caro-Astorga
- a Instituto de Hortofruticultura Subtropical y Mediterránea ''La Mayora'' - Departamento de Microbiología , Universidad de Málaga , Málaga , Spain
| | - Antonio de Vicente
- a Instituto de Hortofruticultura Subtropical y Mediterránea ''La Mayora'' - Departamento de Microbiología , Universidad de Málaga , Málaga , Spain
| | - Diego Romero
- a Instituto de Hortofruticultura Subtropical y Mediterránea ''La Mayora'' - Departamento de Microbiología , Universidad de Málaga , Málaga , Spain
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40
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Hierarchical spidroin micellar nanoparticles as the fundamental precursors of spider silks. Proc Natl Acad Sci U S A 2018; 115:11507-11512. [PMID: 30348773 DOI: 10.1073/pnas.1810203115] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Many natural silks produced by spiders and insects are unique materials in their exceptional toughness and tensile strength, while being lightweight and biodegradable-properties that are currently unparalleled in synthetic materials. Myriad approaches have been attempted to prepare artificial silks from recombinant spider silk spidroins but have each failed to achieve the advantageous properties of the natural material. This is because of an incomplete understanding of the in vivo spidroin-to-fiber spinning process and, particularly, because of a lack of knowledge of the true morphological nature of spidroin nanostructures in the precursor dope solution and the mechanisms by which these nanostructures transform into micrometer-scale silk fibers. Herein we determine the physical form of the natural spidroin precursor nanostructures stored within spider glands that seed the formation of their silks and reveal the fundamental structural transformations that occur during the initial stages of extrusion en route to fiber formation. Using a combination of solution phase diffusion NMR and cryogenic transmission electron microscopy (cryo-TEM), we reveal direct evidence that the concentrated spidroin proteins are stored in the silk glands of black widow spiders as complex, hierarchical nanoassemblies (∼300 nm diameter) that are composed of micellar subdomains, substructures that themselves are engaged in the initial nanoscale transformations that occur in response to shear. We find that the established micelle theory of silk fiber precursor storage is incomplete and that the first steps toward liquid crystalline organization during silk spinning involve the fibrillization of nanoscale hierarchical micelle subdomains.
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41
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Zhang W, Ye C, Zheng K, Zhong J, Tang Y, Fan Y, Buehler MJ, Ling S, Kaplan DL. Tensan Silk-Inspired Hierarchical Fibers for Smart Textile Applications. ACS NANO 2018; 12:6968-6977. [PMID: 29932636 PMCID: PMC6501189 DOI: 10.1021/acsnano.8b02430] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Tensan silk, a natural fiber produced by the Japanese oak silk moth ( Antherea yamamai, abbreviated to A. yamamai), features superior characteristics, such as compressive elasticity and chemical resistance, when compared to the more common silk produced from the domesticated silkworm, Bombyx mori ( B. mori). In this study, the "structure-property" relationships within A. yamamai silk are disclosed from the different structural hierarchies, confirming the outstanding toughness as dominated by the distinct mesoscale fibrillar architectures. Inspired by this hierarchical construction, we fabricated A. yamamai silk-like regenerated B. mori silk fibers (RBSFs) with mechanical properties (extensibility and modulus) comparable to natural A. yamamai silk. These RBSFs were further functionalized to form conductive RBSFs that were sensitive to force and temperature stimuli for applications in smart textiles. This study provides a blueprint in exploiting rational designs from A. yamanmai, which is rare and expensive in comparison to the common and cost-effective B. mori silk to empower enhanced material properties.
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Affiliation(s)
- Wenwen Zhang
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuel & Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Chao Ye
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Ke Zheng
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Jiajia Zhong
- Shanghai Advanced Research Institute (Zhangjiang Lab), Chinese Academy of Sciences, Shanghai, 201210, China
| | - Yuzhao Tang
- Shanghai Advanced Research Institute (Zhangjiang Lab), Chinese Academy of Sciences, Shanghai, 201210, China
| | - Yimin Fan
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuel & Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Markus J. Buehler
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Shengjie Ling
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA, 02155, USA
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42
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Khan MV, Zakariya SM, Khan RH. Protein folding, misfolding and aggregation: A tale of constructive to destructive assembly. Int J Biol Macromol 2018; 112:217-229. [DOI: 10.1016/j.ijbiomac.2018.01.099] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 01/04/2018] [Accepted: 01/14/2018] [Indexed: 12/20/2022]
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43
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Sharma A, Behrens SH, Chernoff YO, Bommarius AS. Modulation of the Formation of Aβ- and Sup35NM-Based Amyloids by Complex Interplay of Specific and Nonspecific Ion Effects. J Phys Chem B 2018; 122:4972-4981. [PMID: 29668283 PMCID: PMC6932987 DOI: 10.1021/acs.jpcb.7b12836] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
In vitro formation of highly ordered protein aggregates, amyloids, is influenced by the presence of ions. Here, we have studied the effect of anions on amyloid fibril formation by two different amyloidogenic proteins, human amyloid beta-42 (Aβ42), associated with Alzheimer disease and produced recombinantly with an N-terminal methionine (Met-Aβ42), and histidine-tagged NM fragment of Sup35 protein (Sup35NM-His6), a yeast release factor controlling protein-based inheritance, at pH values above and below their isoelectric points. We demonstrate here that pH plays a critical role in determining the effect of ions on the aggregation of Met-Aβ42 and Sup35NM-His6. Further, the electrophoretic mobilities of Met-Aβ42 and Sup35NM-His6 were measured in the presence of different anions at pH above and below the isoelectric points to understand how anions interact with these proteins when they bear a net positive or negative charge. We find that although ion-protein interactions generally follow expectations based on the anion positions within the Hofmeister series, there are qualitative differences in the aggregation behavior of Met-Aβ42 and Sup35NM-His6. These differences arise from a competition between nonspecific charge neutralization and screening effects and specific ion adsorption and can be explained by the different biochemical and biophysical properties of Met-Aβ42 and Sup35NM-His6.
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Affiliation(s)
- Aditi Sharma
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Bioengineering Program, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Sven H. Behrens
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Bioengineering Program, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Yury O. Chernoff
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Laboratory of Amyloid Biology and Institute of Translational Biomedicine, St. Petersburg State University, St. Petersburg 199034, Russia
| | - Andreas S. Bommarius
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Bioengineering Program, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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44
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Das S, Jacob RS, Patel K, Singh N, Maji SK. Amyloid Fibrils: Versatile Biomaterials for Cell Adhesion and Tissue Engineering Applications. Biomacromolecules 2018; 19:1826-1839. [DOI: 10.1021/acs.biomac.8b00279] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subhadeep Das
- Department of Biosciences and Bioengineering, IIT Bombay, Powai, Mumbai 400076 Maharashtra, India
| | - Reeba S. Jacob
- Department of Biosciences and Bioengineering, IIT Bombay, Powai, Mumbai 400076 Maharashtra, India
| | - Komal Patel
- Department of Biosciences and Bioengineering, IIT Bombay, Powai, Mumbai 400076 Maharashtra, India
| | - Namrata Singh
- Department of Biosciences and Bioengineering, IIT Bombay, Powai, Mumbai 400076 Maharashtra, India
| | - Samir K. Maji
- Department of Biosciences and Bioengineering, IIT Bombay, Powai, Mumbai 400076 Maharashtra, India
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45
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Shimanovich U, Pinotsi D, Shimanovich K, Yu N, Bolisetty S, Adamcik J, Mezzenga R, Charmet J, Vollrath F, Gazit E, Dobson CM, Schierle GK, Holland C, Kaminski CF, Knowles TPJ. Biophotonics of Native Silk Fibrils. Macromol Biosci 2018; 18:e1700295. [PMID: 29377575 DOI: 10.1002/mabi.201700295] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 10/18/2017] [Indexed: 02/02/2023]
Abstract
Native silk fibroin (NSF) is a unique biomaterial with extraordinary mechanical and biochemical properties. These key characteristics are directly associated with the physical transformation of unstructured, soluble NSF into highly organized nano- and microscale fibrils rich in β-sheet content. Here, it is shown that this NSF fibrillation process is accompanied by the development of intrinsic fluorescence in the visible range, upon near-UV excitation, a phenomenon that has not been investigated in detail to date. Here, the optical and fluorescence characteristics of NSF fibrils are probed and a route for potential applications in the field of self-assembled optically active biomaterials and systems is explored. In particular, it is demonstrated that NSF can be structured into autofluorescent microcapsules with a controllable level of β-sheet content and fluorescence properties. Furthermore, a facile and efficient fabrication route that permits arbitrary patterns of NSF microcapsules to be deposited on substrates under ambient conditions is shown. The resulting fluorescent NSF patterns display a high level of photostability. These results demonstrate the potential of using native silk as a new class of biocompatible photonic material.
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Affiliation(s)
- Ulyana Shimanovich
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, 7600, Israel
| | - Dorothea Pinotsi
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Klimentiy Shimanovich
- The School of Electrical Engineering, University of Tel-Aviv, Tel-Aviv, 69978, Israel
| | - Na Yu
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Sreenath Bolisetty
- Department of Health Science and Technology, ETH Zurich, 8092, Zurich, Switzerland
| | - Jozef Adamcik
- Department of Health Science and Technology, ETH Zurich, 8092, Zurich, Switzerland
| | - Raffaele Mezzenga
- Department of Health Science and Technology, ETH Zurich, 8092, Zurich, Switzerland
| | - Jerome Charmet
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Fritz Vollrath
- Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK
| | - Ehud Gazit
- Department of Molecular Biology and Biotechnology, University of Tel-Aviv, Tel-Aviv, 69978, Israel.,Department of Materials Science and Engineering, University of Tel Aviv, Tel Aviv, 69978, Israel
| | - Christopher M Dobson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Gabriele Kaminski Schierle
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Chris Holland
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, UK
| | - Clemens F Kaminski
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
| | - Tuomas P J Knowles
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.,Cavendish Laboratory, Department of Physics, University of Cambridge, J J Thomson Avenue, Cambridge, CB3 0HE, UK
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46
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Fink TD, Zha RH. Silk and Silk-Like Supramolecular Materials. Macromol Rapid Commun 2018; 39:e1700834. [DOI: 10.1002/marc.201700834] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 01/16/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Tanner D. Fink
- Department of Chemical and Biological Engineering; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; 110 8th St. Troy NY 12180 USA
| | - R. Helen Zha
- Department of Chemical and Biological Engineering; Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; 110 8th St. Troy NY 12180 USA
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47
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Upadhyay A, Mishra A. Amyloids of multiple species: are they helpful in survival? Biol Rev Camb Philos Soc 2018; 93:1363-1386. [DOI: 10.1111/brv.12399] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 01/13/2018] [Accepted: 01/18/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Arun Upadhyay
- Cellular and Molecular Neurobiology Unit; Indian Institute of Technology Jodhpur; Rajasthan 342011 India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit; Indian Institute of Technology Jodhpur; Rajasthan 342011 India
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48
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Humenik M, Lang G, Scheibel T. Silk nanofibril self-assembly versus electrospinning. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1509. [PMID: 29393590 DOI: 10.1002/wnan.1509] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/18/2017] [Accepted: 12/19/2017] [Indexed: 01/16/2023]
Abstract
Natural silk fibers represent one of the most advanced blueprints for (bio)polymer scientists, displaying highly optimized mechanical properties due to their hierarchical structures. Biotechnological production of silk proteins and implementation of advanced processing methods enabled harnessing the potential of these biopolymer not just based on the mechanical properties. In addition to fibers, diverse morphologies can be produced, such as nonwoven meshes, films, hydrogels, foams, capsules and particles. Among them, nanoscale fibrils and fibers are particularly interesting concerning medical and technical applications due to their biocompatibility, environmental and mechanical robustness as well as high surface-to-volume ratio. Therefore, we introduce here self-assembly of silk proteins into hierarchically organized structures such as supramolecular nanofibrils and fabricated materials based thereon. As an alternative to self-assembly, we also present electrospinning a technique to produce nanofibers and nanofibrous mats. Accordingly, we introduce a broad range of silk-based dopes, used in self-assembly and electrospinning: natural silk proteins originating from natural spinning glands, natural silk protein solutions reconstituted from fibers, engineered recombinant silk proteins designed from natural blueprints, genetic fusions of recombinant silk proteins with other structural or functional peptides and moieties, as well as hybrids of recombinant silk proteins chemically conjugated with nonproteinaceous biotic or abiotic molecules. We highlight the advantages but also point out drawbacks of each particular production route. The scope includes studies of the natural self-assembly mechanism during natural silk spinning, production of silk fibrils as new nanostructured non-native scaffolds allowing dynamic morphological switches, as well as studying potential applications. This article is categorized under: Biology-Inspired Nanomaterials > Peptide-Based Structures Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Biology-Inspired Nanomaterials > Protein and Virus-Based Structures.
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Affiliation(s)
- Martin Humenik
- Biomaterials, Faculty of Engineering Science, University of Bayreuth, Bayreuth, Germany
| | - Gregor Lang
- Biomaterials, Faculty of Engineering Science, University of Bayreuth, Bayreuth, Germany
| | - Thomas Scheibel
- Biomaterials, Faculty of Engineering Science, University of Bayreuth, Bayreuth, Germany.,Bayreuth Center for Colloids and Interfaces (BZKG), Research Center Bio-Macromolecules (BIOmac), Bayreuth Center for Molecular Biosciences (BZMB), Bayreuth Center for Material Science (BayMAT), Bavarian Polymer Institute (BPI), Universität Bayreuth, Bayreuth, Germany
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49
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Kuroda R, Kameda T. Conformation change of hornet silk proteins in the solid phase in response to external stimulation. Chirality 2018; 30:541-547. [PMID: 29384590 DOI: 10.1002/chir.22824] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 12/29/2017] [Accepted: 01/03/2018] [Indexed: 11/07/2022]
Abstract
Hornet silks adopt a variety of morphology such as fibers, sponge, films, and gels depending on the preparation methods. We have studied the conformation change of hornet silk proteins (Vespa mandarina) as regenerated films, using chiroptical spectrophotometer universal chiroptical spectrophotometer 1, which can measure true circular dichroism spectra without artifact signals that are intrinsic to solid-state samples. The spectra showed that the proteins in films alter the conformation rapidly from the α-helix to the coiled coil and then to a β-sheet structure in response to heat/moisture treatment, but the transformation stopped at the coiled coil state when the sample was soaked in EtOH/water solution. Water is required for the α-helix to the coiled coil transition, and extra energy is required for the further transition to a β-sheet structure. This is the first successful circular dichroism study of fibril silk proteins to follow the conformation changes in the solid state. This work shows that proteins can undergo conformational changes easily even in the solid phase in response to external stimuli, and this can be traced by solid-phase-feasible chiroptical spectrophotometers. Application of unnatural stress to proteins gives valuable insights into their structure and characteristics.
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Affiliation(s)
- Reiko Kuroda
- Research Institute for Science and Technology, Tokyo University of Science, Chiba, Japan
| | - Tsunenori Kameda
- Silk Material Research Unit, National Agriculture and Food Research Organization, Ibaraki, Japan
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50
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Socias SB, González-Lizárraga F, Avila CL, Vera C, Acuña L, Sepulveda-Diaz JE, Del-Bel E, Raisman-Vozari R, Chehin RN. Exploiting the therapeutic potential of ready-to-use drugs: Repurposing antibiotics against amyloid aggregation in neurodegenerative diseases. Prog Neurobiol 2017; 162:17-36. [PMID: 29241812 DOI: 10.1016/j.pneurobio.2017.12.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 12/07/2017] [Accepted: 12/07/2017] [Indexed: 01/02/2023]
Abstract
Neurodegenerative diseases are chronic and progressive disorders that affect specific regions of the brain, causing gradual disability and suffering that results in a complete inability of patients to perform daily functions. Amyloid aggregation of specific proteins is the most common biological event that is responsible for neuronal death and neurodegeneration in various neurodegenerative diseases. Therapeutic agents capable of interfering with the abnormal aggregation are required, but traditional drug discovery has fallen short. The exploration of new uses for approved drugs provides a useful alternative to fill the gap between the increasing incidence of neurodegenerative diseases and the long-term assessment of classical drug discovery technologies. Drug re-profiling is currently the quickest possible transition from bench to bedside. In this way, experimental evidence shows that some antibiotic compounds exert neuroprotective action through anti-aggregating activity on disease-associated proteins. The finding that many antibiotics can cross the blood-brain barrier and have been used for several decades without serious toxic effects makes them excellent candidates for therapeutic switching towards neurological disorders. The present review is, to our knowledge, the first extensive evaluation and analysis of the anti-amyloidogenic effect of different antibiotics on well-known disease-associated proteins. In addition, we propose a common structural signature derived from the antiaggregant antibiotic molecules that could be relevant to rational drug discovery.
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Affiliation(s)
- Sergio B Socias
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina
| | - Florencia González-Lizárraga
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina
| | - Cesar L Avila
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina
| | - Cecilia Vera
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina
| | - Leonardo Acuña
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina; Sorbonne Universite, UPMC Univ Paris 06, INSERM, CNRS, UM75, U1127, UMR 7225, Institut du Cerveau et de la Moelle Epinière, Paris, France
| | - Julia E Sepulveda-Diaz
- Sorbonne Universite, UPMC Univ Paris 06, INSERM, CNRS, UM75, U1127, UMR 7225, Institut du Cerveau et de la Moelle Epinière, Paris, France
| | - Elaine Del-Bel
- Department of Morphology, Physiology and Stomatology, Faculty of Odontology of Ribeirão Preto, University of São Paulo, Brazil; Center of Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, Brazil
| | - Rita Raisman-Vozari
- Sorbonne Universite, UPMC Univ Paris 06, INSERM, CNRS, UM75, U1127, UMR 7225, Institut du Cerveau et de la Moelle Epinière, Paris, France.
| | - Rosana N Chehin
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, and Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina, Argentina.
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