1
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Holt C, Carver JA. Invited review: Modeling milk stability. J Dairy Sci 2024; 107:5259-5279. [PMID: 38522835 DOI: 10.3168/jds.2024-24779] [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: 02/12/2024] [Accepted: 02/15/2024] [Indexed: 03/26/2024]
Abstract
Novel insights into the stability of milk and milk products during storage and processing result from describing caseins near neutral pH as hydrophilic, intrinsically disordered, proteins. Casein solubility is strongly influenced by pH and multivalent ion binding. Solubility is high at a neutral pH or above, but decreases as the casein net charge approaches zero, allowing a condensed casein phase or gel to form, then increases at lower pH. Of particular importance for casein micelle stability near neutral pH is the proportion of free caseins in the micelle (i.e., caseins not bound directly to nanoclusters of calcium phosphate). Free caseins are more soluble and better able to act as molecular chaperones (to prevent casein and whey protein aggregation) than bound caseins. Some free caseins are highly phosphorylated and can also act as mineral chaperones to inhibit the growth of calcium phosphate phases and prevent mineralized deposits from forming on membranes or heat exchangers. Thus, casein micelle stability is reduced when free caseins bind to amyloid fibrils, destabilized whey proteins or calcium phosphate. The multivalent-binding model of the casein micelle quantitatively describes these and other factors affecting the stability of milk and milk protein products during manufacture and storage.
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Affiliation(s)
- C Holt
- School of Biomolecular Sciences, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
| | - J A Carver
- Research School of Chemistry, The Australian National University, Acton, ACT 2601, Australia
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2
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Tiroli-Cepeda AO, Linhares LA, Aragão AZB, de Jesus JR, Wasilewska-Sampaio AP, De Felice FG, Ferreira ST, Borges JC, Cyr DM, Ramos CHI. Type I Hsp40s/DnaJs aggregates exhibit features reminiscent of amyloidogenic structures. FEBS J 2024. [PMID: 38975859 DOI: 10.1111/febs.17215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/14/2024] [Accepted: 06/20/2024] [Indexed: 07/09/2024]
Abstract
A rise in temperature triggers a structural change in the human Type I 40 kDa heat shock protein (Hsp40/DnaJ), known as DNAJA1. This change leads to a less compact structure, characterized by an increased presence of solvent-exposed hydrophobic patches and β-sheet-rich regions. This transformation is validated by circular dichroism, thioflavin T binding, and Bis-ANS assays. The formation of this β-sheet-rich conformation, which is amplified in the absence of zinc, leads to protein aggregation. This aggregation is induced not only by high temperatures but also by low ionic strength and high protein concentration. The aggregated conformation exhibits characteristics of an amyloidogenic structure, including a distinctive X-ray diffraction pattern, seeding competence (which stimulates the formation of amyloid-like aggregates), cytotoxicity, resistance to SDS, and fibril formation. Interestingly, the yeast Type I Ydj1 also tends to adopt a similar β-sheet-rich structure under comparable conditions, whereas Type II Hsp40s, whether human or from yeast, do not. Moreover, Ydj1 aggregates were found to be cytotoxic. Studies using DNAJA1- and Ydj1-deleted mutants suggest that the zinc-finger region plays a crucial role in amyloid formation. Our discovery of amyloid aggregation in a C-terminal deletion mutant of DNAJA1, which resembles a spliced homolog expressed in the testis, implies that Type I Hsp40 co-chaperones may generate amyloidogenic species in vivo.
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Affiliation(s)
- Ana O Tiroli-Cepeda
- Institute of Chemistry, Universidade Estadual de Campinas-UNICAMP, Campinas, Brazil
| | - Leonardo A Linhares
- Institute of Chemistry, Universidade Estadual de Campinas-UNICAMP, Campinas, Brazil
| | - Annelize Z B Aragão
- Institute of Chemistry, Universidade Estadual de Campinas-UNICAMP, Campinas, Brazil
| | - Jemmyson R de Jesus
- Institute of Chemistry, Universidade Estadual de Campinas-UNICAMP, Campinas, Brazil
| | | | - Fernanda G De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Rio de Janeiro, Brazil
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Sérgio T Ferreira
- Institute of Medical Biochemistry Leopoldo de Meis, Rio de Janeiro, Brazil
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Júlio C Borges
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | | | - Carlos H I Ramos
- Institute of Chemistry, Universidade Estadual de Campinas-UNICAMP, Campinas, Brazil
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3
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Wang Y, Liang X, Andrikopoulos N, Tang H, He F, Yin X, Li Y, Ding F, Peng G, Mortimer M, Ke PC. Remediation of Metal Oxide Nanotoxicity with a Functional Amyloid. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2310314. [PMID: 38582521 PMCID: PMC11187920 DOI: 10.1002/advs.202310314] [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: 12/29/2023] [Revised: 03/21/2024] [Indexed: 04/08/2024]
Abstract
Understanding the environmental health and safety of nanomaterials (NanoEHS) is essential for the sustained development of nanotechnology. Although extensive research over the past two decades has elucidated the phenomena, mechanisms, and implications of nanomaterials in cellular and organismal models, the active remediation of the adverse biological and environmental effects of nanomaterials remains largely unexplored. Inspired by recent developments in functional amyloids for biomedical and environmental engineering, this work shows their new utility as metallothionein mimics in the strategically important area of NanoEHS. Specifically, metal ions released from CuO and ZnO nanoparticles are sequestered through cysteine coordination and electrostatic interactions with beta-lactoglobulin (bLg) amyloid, as revealed by inductively coupled plasma mass spectrometry and molecular dynamics simulations. The toxicity of the metal oxide nanoparticles is subsequently mitigated by functional amyloids, as validated by cell viability and apoptosis assays in vitro and murine survival and biomarker assays in vivo. As bLg amyloid fibrils can be readily produced from whey in large quantities at a low cost, the study offers a crucial strategy for remediating the biological and environmental footprints of transition metal oxide nanomaterials.
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Affiliation(s)
- Yue Wang
- School of Biomedical Sciences and EngineeringGuangzhou International CampusSouth China University of TechnologyGuangzhou510006China
- Nanomedicine CenterGreat Bay Area National Institute for Nanotechnology Innovation136 Kaiyuan AvenueGuangzhou510700China
| | - Xiufang Liang
- School of Biomedical Sciences and EngineeringGuangzhou International CampusSouth China University of TechnologyGuangzhou510006China
- Nanomedicine CenterGreat Bay Area National Institute for Nanotechnology Innovation136 Kaiyuan AvenueGuangzhou510700China
| | - Nicholas Andrikopoulos
- Nanomedicine CenterGreat Bay Area National Institute for Nanotechnology Innovation136 Kaiyuan AvenueGuangzhou510700China
- Drug DeliveryDisposition and DynamicsMonash Institute of Pharmaceutical SciencesMonash University381 Royal ParadeParkvilleVIC3052Australia
| | - Huayuan Tang
- Department of Engineering MechanicsHohai UniversityNanjing211100China
- Department of Physics and AstronomyClemson UniversityClemsonSC29634USA
| | - Fei He
- College of Environmental Science and EngineeringKey Laboratory of Yangtze River Water EnvironmentTongji University1239 Siping RoadShanghai200092China
| | - Xiang Yin
- College of Environmental Science and EngineeringKey Laboratory of Yangtze River Water EnvironmentTongji University1239 Siping RoadShanghai200092China
| | - Yuhuan Li
- Drug DeliveryDisposition and DynamicsMonash Institute of Pharmaceutical SciencesMonash University381 Royal ParadeParkvilleVIC3052Australia
- Liver Cancer InstituteZhongshan HospitalKey Laboratory of Carcinogenesis and Cancer InvasionMinistry of EducationFudan UniversityShanghai200032China
| | - Feng Ding
- Department of Physics and AstronomyClemson UniversityClemsonSC29634USA
| | - Guotao Peng
- College of Environmental Science and EngineeringKey Laboratory of Yangtze River Water EnvironmentTongji University1239 Siping RoadShanghai200092China
| | - Monika Mortimer
- Laboratory of Environmental ToxicologyNational Institute of Chemical Physics and BiophysicsAkadeemia tee 23Tallinn12618Estonia
| | - Pu Chun Ke
- Nanomedicine CenterGreat Bay Area National Institute for Nanotechnology Innovation136 Kaiyuan AvenueGuangzhou510700China
- Drug DeliveryDisposition and DynamicsMonash Institute of Pharmaceutical SciencesMonash University381 Royal ParadeParkvilleVIC3052Australia
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4
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Pusara S. Molecular Dynamics Insights into the Aggregation Behavior of N-Terminal β-Lactoglobulin Peptides. Int J Mol Sci 2024; 25:4660. [PMID: 38731878 PMCID: PMC11083573 DOI: 10.3390/ijms25094660] [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: 03/21/2024] [Revised: 04/16/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024] Open
Abstract
β-lactoglobulin (BLG) forms amyloid-like aggregates at high temperatures, low pH, and low ionic strengths. At a pH below 2, BLG undergoes hydrolysis into peptides, with N-terminal peptides 1-33 and 1-52 being prone to fibrillization, forming amyloid-like fibrils. Due to their good mechanical properties, BLG amyloids demonstrate great potential for diverse applications, including biosensors, nanocomposites, and catalysts. Consequently, further studies are essential to comprehensively understand the factors governing the formation of BLG amyloid-like morphologies. In this study, all-atom molecular dynamics simulations were employed to explore the aggregation of N-terminal 1-33 and 1-52 BLG peptides under conditions of pH 2 and at 10 mM NaCl concentration. The simulations revealed that the peptides spontaneously assembled into aggregates of varying sizes. The aggregation process was enabled by the low charge of peptides and the presence of hydrophobic residues within them. As the peptides associated into aggregates, there was a concurrent increase in β-sheet structures and the establishment of hydrogen bonds, enhancing the stability of the aggregates. Notably, on average, 1-33 peptides formed larger aggregates compared to their 1-52 counterparts, while the latter exhibited a slightly higher content of β-sheets and higher cluster orderliness. The applied approach facilitated insights into the early stages of amyloid-like aggregation and molecular-level insight into the formation of β-sheets, which serve as nucleation points for further fibril growth.
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Affiliation(s)
- Srdjan Pusara
- Institute of Nanotechnology, Karlsruhe Institute of Technology KIT, Kaiserstraße 12, 76131 Karlsruhe, Germany
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5
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Zhang B, Jiang R, Dong K, Li J, Zhang Y, Ghorani B, Emadzadeh B, Nishinari K, Yang N. Controlling Solvent Polarity to Regulate Protein Self-Assembly Morphology and Its Universal Insight for Fibrillation Mechanism. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7733-7746. [PMID: 38538620 DOI: 10.1021/acs.langmuir.4c00438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
The mechanism of ethanol-induced fibrillation of β-lactoglobulin (β-lg) in the acidic aqueous solution upon heating was investigated using various techniques, mainly thioflavin T fluorescence, atomic force microscopy, nonreducing electrophoresis, mass spectrometry, Fourier transform infrared spectroscopy, and circular dichroism spectroscopy. The results showed that fibrillation occurred with a heating time increase, but high ethanol content slowed down the process. At a low ethanol volume fraction, peptides existed after heating for 2 h, with long and straight fibrils formed after 4-6 h, while at a high ethanol volume fraction, the proteins aggregated with very few peptides appeared at the early stage of heating, and short and curved fibrils formed after heating for 8 h. Ethanol weakened the hydrophobic interactions between proteins in the aqueous solution; therefore the latter could not completely balance the electrostatic repulsion, and thus suppressing the fibrillation process. It is believed that the fibrillation of β-lg in the acidic solution upon heating is mainly dominated by the polypeptide model; however, ethanol inhibited the hydrolysis of proteins, and the self-assembly mechanism changed to the monomer model.
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Affiliation(s)
- Bao Zhang
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
| | - Ruisheng Jiang
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
| | - Kexin Dong
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
| | - Jing Li
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
| | - Yan Zhang
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
- Food Hydrocolloid International Science and Technology Cooperation Base of Hubei Province, Hubei University of Technology, Wuhan 430068, China
| | - Behrouz Ghorani
- Department of Food Nanotechnology, Research Institute of Food Science & Technology (RIFST), Mashhad 91895-157-356, Iran
| | - Bahareh Emadzadeh
- Department of Food Nanotechnology, Research Institute of Food Science & Technology (RIFST), Mashhad 91895-157-356, Iran
| | - Katsuyoshi Nishinari
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
- Food Hydrocolloid International Science and Technology Cooperation Base of Hubei Province, Hubei University of Technology, Wuhan 430068, China
| | - Nan Yang
- Glyn O. Phillips Hydrocolloid Research Centre, National "111″ Center for Cellular Regulation and Molecular Pharmaceutics, Key Laboratory of Fermentation Engineering of Ministry of Education, Key Laboratory of Industrial Microbiology in Hubei Province, Department of Bioengineering and Food Science, Hubei University of Technology, Wuhan 430068, China
- Food Hydrocolloid International Science and Technology Cooperation Base of Hubei Province, Hubei University of Technology, Wuhan 430068, China
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6
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Bettelli MA, Hu Q, Capezza AJ, Johansson E, Olsson RT, Hedenqvist MS. Effects of multi-functional additives during foam extrusion of wheat gluten materials. Commun Chem 2024; 7:75. [PMID: 38570707 PMCID: PMC10991538 DOI: 10.1038/s42004-024-01150-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 03/13/2024] [Indexed: 04/05/2024] Open
Abstract
To broaden the range in structures and properties, and therefore the applicability of sustainable foams based on wheat gluten expanded with ammonium-bicarbonate, we show here how three naturally ocurring multifunctional additives affect their properties. Citric acid yields foams with the lowest density (porosity of ~50%) with mainly closed cells. Gallic acid acts as a radical scavenger, yielding the least crosslinked/ aggregated foam. The use of a low amount of this acid yields foams with the highest uptake of the body-fluid model substance (saline, ~130% after 24 hours). However, foams with genipin show a large and rapid capillary uptake (50% in one second), due to their high content of open cells. The most dense and stiff foam is obtained with one weight percent genipin, which is also the most crosslinked. Overall, the foams show a high energy loss-rate under cyclic compression (84-92% at 50% strain), indicating promising cushioning behaviour. They also show a low compression set, indicating promising sealability. Overall, the work here provides a step towards using protein biofoams as a sustainable alternative to fossil-based plastic/rubber foams in applications where absorbent and/or mechanical properties play a key role.
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Affiliation(s)
- Mercedes A Bettelli
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Qisong Hu
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Antonio J Capezza
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Eva Johansson
- Department of Plant Breeding, The Swedish University of Agricultural Sciences, Box 190, SE-234 22, Lomma, Sweden
| | - Richard T Olsson
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, 10044, Sweden.
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7
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Li T, Kambanis J, Sorenson TL, Sunde M, Shen Y. From Fundamental Amyloid Protein Self-Assembly to Development of Bioplastics. Biomacromolecules 2024; 25:5-23. [PMID: 38147506 PMCID: PMC10777412 DOI: 10.1021/acs.biomac.3c01129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/03/2023] [Accepted: 12/04/2023] [Indexed: 12/28/2023]
Abstract
Proteins can self-assemble into a range of nanostructures as a result of molecular interactions. Amyloid nanofibrils, as one of them, were first discovered with regard to the relevance of neurodegenerative diseases but now have been exploited as building blocks to generate multiscale materials with designed functions for versatile applications. This review interconnects the mechanism of amyloid fibrillation, the current approaches to synthesizing amyloid protein-based materials, and the application in bioplastic development. We focus on the fundamental structures of self-assembled amyloid fibrils and how external factors can affect protein aggregation to optimize the process. Protein self-assembly is essentially the autonomous congregation of smaller protein units into larger, organized structures. Since the properties of the self-assembly can be manipulated by changing intrinsic factors and external conditions, protein self-assembly serves as an excellent building block for bioplastic development. Building on these principles, general processing methods and pathways from raw protein sources to mature state materials are proposed, providing a guide for the development of large-scale production. Additionally, this review discusses the diverse properties of protein-based amyloid nanofibrils and how they can be utilized as bioplastics. The economic feasibility of the protein bioplastics is also compared to conventional plastics in large-scale production scenarios, supporting their potential as sustainable bioplastics for future applications.
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Affiliation(s)
- Tianchen Li
- School
of Chemical and Biomolecular Engineering and Sydney Nano, The University of Sydney, PNR Building, Darlington NSW 2008, Australia
| | - Jordan Kambanis
- School
of Chemical and Biomolecular Engineering and Sydney Nano, The University of Sydney, PNR Building, Darlington NSW 2008, Australia
| | - Timothy L. Sorenson
- School
of Chemical and Biomolecular Engineering and Sydney Nano, The University of Sydney, PNR Building, Darlington NSW 2008, Australia
| | - Margaret Sunde
- School
of Medical Sciences and Sydney Nano, The
University of Sydney, Sydney NSW 2006, Australia
| | - Yi Shen
- School
of Chemical and Biomolecular Engineering and Sydney Nano, The University of Sydney, PNR Building, Darlington NSW 2008, Australia
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8
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Louros N, Schymkowitz J, Rousseau F. Mechanisms and pathology of protein misfolding and aggregation. Nat Rev Mol Cell Biol 2023; 24:912-933. [PMID: 37684425 DOI: 10.1038/s41580-023-00647-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/28/2023] [Indexed: 09/10/2023]
Abstract
Despite advances in machine learning-based protein structure prediction, we are still far from fully understanding how proteins fold into their native conformation. The conventional notion that polypeptides fold spontaneously to their biologically active states has gradually been replaced by our understanding that cellular protein folding often requires context-dependent guidance from molecular chaperones in order to avoid misfolding. Misfolded proteins can aggregate into larger structures, such as amyloid fibrils, which perpetuate the misfolding process, creating a self-reinforcing cascade. A surge in amyloid fibril structures has deepened our comprehension of how a single polypeptide sequence can exhibit multiple amyloid conformations, known as polymorphism. The assembly of these polymorphs is not a random process but is influenced by the specific conditions and tissues in which they originate. This observation suggests that, similar to the folding of native proteins, the kinetics of pathological amyloid assembly are modulated by interactions specific to cells and tissues. Here, we review the current understanding of how intrinsic protein conformational propensities are modulated by physiological and pathological interactions in the cell to shape protein misfolding and aggregation pathology.
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Affiliation(s)
- Nikolaos Louros
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium
- Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium.
- Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium.
| | - Frederic Rousseau
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Leuven, Belgium.
- Department of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium.
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9
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Zheng Y, Gao Y, Chang Y, Sun C, Fang Y. Concentration-Regulated Fibrillation of Soy Protein: Structure and In Vitro Digestion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37433090 DOI: 10.1021/acs.jafc.3c02206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
The impact of protein types, heating temperatures, and times on protein fibrillation has been widely studied. However, there is little understanding of the influence of protein concentration (PC) on the protein fibril assembly. In this work, the structure and in vitro digestibility of soy protein amyloid fibrils (SAFs) were investigated at pH 2.0 and different PCs. Significant increases in fibril conversion rate and parallel β-sheets proportion were observed in SAFs upon increasing the PC from 2 to 8% (w/v). The AFM images showed that curly fibrils were prone to form at 2-6% PCs, while rigid, straight fibrils developed at higher PCs (≥8%). As evidenced in XRD results, increasing PC led to a more stable structure of SAFs with enhanced thermal stability and lower digestibility. Moreover, positive correlations among PC, β-sheet content, persistence length, enthalpy, and total hydrolysis were established. These findings would provide valuable insights into concentration-regulated protein fibrillation.
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Affiliation(s)
- Yixin Zheng
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yixin Gao
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuyang Chang
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Cuixia Sun
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yapeng Fang
- Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China
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10
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Santos TP, Calabrese V, Boehm MW, Baier SK, Shen AQ. Flow-induced alignment of protein nanofibril dispersions. J Colloid Interface Sci 2023; 638:487-497. [PMID: 36758259 DOI: 10.1016/j.jcis.2023.01.105] [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: 11/09/2022] [Revised: 01/19/2023] [Accepted: 01/21/2023] [Indexed: 02/05/2023]
Abstract
HYPOTHESIS Protein nanofibrils (PNF) resulting from the self-assembly of proteins or peptides can present structural ordering triggered by numerous factors, including the shear flow. We hypothesize that i) depending on the contour length of the PNF and the magnitude of the shear rate applied to the PNF dispersion, they exhibit specific orientation, and ii) it is possible to predict the alignment of PNF by establishing a flow-alignment relationship. Understanding such a relationship is pivotal to improving the fundamental knowledge and application of fibril systems. EXPERIMENTS We use β-lactoglobulin PNF aqueous dispersions with different average contour lengths but equal persistence lengths. We employ simple shear-dominated microfluidic devices with state-of-the-art imaging techniques: flow-induced birefringence (FIB) and micro-particle image velocimetry (μ-PIV), to probe the effect of shear flow on PNF alignment. FINDINGS We provide an empirical relationship connecting the birefringence Δn (quantifying the extent of PNF alignment), and the Péclet number Pe (correlating the shear rate of the flow relative to the rotational diffusion of PNF) to understand the flow-alignment behavior of PNF under shear-dominated flows. Furthermore, we assess the alignment and flow profile of PNF at both high and low flow rates. The length of PNF emerges as a controlling parameter capable of modulating PNF alignment at specific shear rates. Our results shed new insights into the hydrodynamic behavior of PNF, which is highly relevant to various industrial processes involving the fibril systems.
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Affiliation(s)
- Tatiana P Santos
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan.
| | - Vincenzo Calabrese
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | | | - Stefan K Baier
- Motif FoodWorks, Inc., Boston, MA, USA; The University of Queensland School of Chemical Engineering, St. Lucia, Queensland, Australia
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan.
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11
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Balasco N, Diaferia C, Rosa E, Monti A, Ruvo M, Doti N, Vitagliano L. A Comprehensive Analysis of the Intrinsic Visible Fluorescence Emitted by Peptide/Protein Amyloid-like Assemblies. Int J Mol Sci 2023; 24:ijms24098372. [PMID: 37176084 PMCID: PMC10178990 DOI: 10.3390/ijms24098372] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Amyloid aggregation is a widespread process that involves proteins and peptides with different molecular complexity and amino acid composition. The structural motif (cross-β) underlying this supramolecular organization generates aggregates endowed with special mechanical and spectroscopic properties with huge implications in biomedical and technological fields, including emerging precision medicine. The puzzling ability of these assemblies to emit intrinsic and label-free fluorescence in regions of the electromagnetic spectrum, such as visible and even infrared, usually considered to be forbidden in the polypeptide chain, has attracted interest for its many implications in both basic and applied science. Despite the interest in this phenomenon, the physical basis of its origin is still poorly understood. To gain a global view of the available information on this phenomenon, we here provide an exhaustive survey of the current literature in which original data on this fluorescence have been reported. The emitting systems have been classified in terms of their molecular complexity, amino acid composition, and physical state. Information about the wavelength of the radiation used for the excitation as well as the emission range/peak has also been retrieved. The data collected here provide a picture of the complexity of this multifaceted phenomenon that could be helpful for future studies aimed at defining its structural and electronic basis and/or stimulating new applications.
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Affiliation(s)
- Nicole Balasco
- Institute of Molecular Biology and Pathology, National Research Council (CNR), Department of Chemistry, University of Rome Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Carlo Diaferia
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Via Montesano 49, 80131 Naples, Italy
| | - Elisabetta Rosa
- Department of Pharmacy and CIRPeB, Research Centre on Bioactive Peptides "Carlo Pedone", University of Naples "Federico II", Via Montesano 49, 80131 Naples, Italy
| | - Alessandra Monti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Menotti Ruvo
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Nunzianna Doti
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
| | - Luigi Vitagliano
- Institute of Biostructures and Bioimaging (IBB), National Research Council (CNR), 80131 Napoli, Italy
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12
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Zhang Y, Dee DR. Morphology, Formation Kinetics and Core Composition of Pea and Soy 7S and 11S Globulin Amyloid Fibrils. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:4755-4765. [PMID: 36890640 DOI: 10.1021/acs.jafc.2c08704] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Legume seed storage proteins can be induced to form amyloid fibrils upon heating at low pH, which could improve their functionality for use in food and materials. However, the amyloidogenic regions of legume proteins are largely unknown. Here, we used LC-MS/MS to determine the amyloid core regions of fibrils formed by enriched pea and soy 7S and 11S globulins at pH 2, 80 °C, and characterized their hydrolysis, assembly kinetics, and morphology. A lag phase was absent from the fibrillation kinetics of pea and soy 7S globulins, while 11S globulins and crude extracts displayed a similar lag time. Pea and soy protein fibrils differed in morphology, with most pea fibrils being straight and soy fibrils being worm-like. Pea and soy globulins were abundant in amyloid-forming peptides, with over 100 unique fibril-core peptides from pea 7S and around 50 unique fibril-core peptides identified from pea 11S, soy 7S, and soy 11S globulins. Amyloidogenic regions derive predominantly from the homologous core region of 7S globulins and the basic subunit of 11S globulins. Overall, pea and soy 7S and 11S globulins are rich in amyloidogenic regions. This study will help understand their fibrillation mechanism and engineer protein fibrils with specific structures and functionality.
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Affiliation(s)
- Yuran Zhang
- Food, Nutrition and Health, Faculty of Land and Food Systems, The University of British Columbia, 2205 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Derek R Dee
- Food, Nutrition and Health, Faculty of Land and Food Systems, The University of British Columbia, 2205 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
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13
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Application of Amyloid-Based Hybrid Membranes in Drug Delivery. Polymers (Basel) 2023; 15:polym15061444. [PMID: 36987222 PMCID: PMC10052896 DOI: 10.3390/polym15061444] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/07/2023] [Accepted: 03/13/2023] [Indexed: 03/15/2023] Open
Abstract
The properties of amyloid fibrils, e.g., unique structural characteristics and superior biocompatibility, make them a promising vehicle for drug delivery. Here, carboxymethyl cellulose (CMC) and whey protein isolate amyloid fibril (WPI-AF) were used to synthesize amyloid-based hybrid membranes as vehicles for the delivery of cationic and hydrophobic drugs (e.g., methylene blue (MB) and riboflavin (RF)). The CMC/WPI-AF membranes were synthesized via chemical crosslinking coupled with phase inversion. The zeta potential and scanning electron microscopy results revealed a negative charge and a pleated surface microstructure with a high content of WPI-AF. FTIR analysis showed that the CMC and WPI-AF were cross-linked via glutaraldehyde and the interacting forces between membrane and MB or RF was found to be electrostatic interaction and hydrogen bonding, respectively. Next, the in vitro drug release from membranes was monitored using UV-vis spectrophotometry. Additionally, two empirical models were used to analyze the drug release data and relevant rate constant and parameters were determined accordingly. Moreover, our results indicated that in vitro drug release rates depended on the drug–matrix interactions and transport mechanism, which could be controlled by altering the WPI-AF content in membrane. This research provides an excellent example of utilizing two-dimensional amyloid-based materials for drug delivery.
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14
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Hoppenreijs LJ, Brune SE, Biedendieck R, Krull R, Boom RM, Keppler JK. Fibrillation of β-lactoglobulin at pH 2.0: Impact of cysteine substitution and disulfide bond reduction intended for food Hydrocolloids. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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15
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Heyn TR, Schrader M, Kampen I, Kwade A, Schwarz K, Keppler JK. Glass beads increase the formation kinetics of beta-lactoglobulin amyloid fibrils. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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16
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Rahman MM, Pires RS, Herneke A, Gowda V, Langton M, Biverstål H, Lendel C. Food protein-derived amyloids do not accelerate amyloid β aggregation. Sci Rep 2023; 13:985. [PMID: 36720893 PMCID: PMC9889329 DOI: 10.1038/s41598-023-28147-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 01/13/2023] [Indexed: 02/01/2023] Open
Abstract
The deposition of proteins in the form of amyloid fibrils is closely associated with several serious diseases. The events that trigger the conversion from soluble functional proteins into insoluble amyloid are not fully understood. Many proteins that are not associated with disease can form amyloid with similar structural characteristics as the disease-associated fibrils, which highlights the potential risk of cross-seeding of disease amyloid by amyloid-like structures encountered in our surrounding. Of particular interest are common food proteins that can be transformed into amyloid under conditions similar to cooking. We here investigate cross-seeding of amyloid-β (Aβ), a peptide known to form amyloid during the development of Alzheimer's disease, by 16 types of amyloid fibrils derived from food proteins or peptides. Kinetic studies using thioflavin T fluorescence as output show that none of the investigated protein fibrils accelerates the aggregation of Aβ. In at least two cases (hen egg lysozyme and oat protein isolate) we observe retardation of the aggregation, which appears to originate from interactions between the food protein seeds and Aβ in aggregated form. The results support the view that food-derived amyloid is not a risk factor for development of Aβ pathology and Alzheimer's disease.
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Affiliation(s)
- M Mahafuzur Rahman
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Rodrigo Sanches Pires
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Anja Herneke
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, BioCentrum, Almas Allé 5, 756 61, Uppsala, Sweden
| | - Vasantha Gowda
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden
| | - Maud Langton
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, BioCentrum, Almas Allé 5, 756 61, Uppsala, Sweden
| | - Henrik Biverstål
- Department of Biosciences and Nutrition, Karolinska Institutet, NEO/Floor 8, Blickgången 16, 141 52, Huddinge, Sweden
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, 100 44, Stockholm, Sweden.
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17
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Bettelli MA, Capezza AJ, Nilsson F, Johansson E, Olsson RT, Hedenqvist MS. Sustainable Wheat Protein Biofoams: Dry Upscalable Extrusion at Low Temperature. Biomacromolecules 2022; 23:5116-5126. [PMID: 36349363 DOI: 10.1021/acs.biomac.2c00953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Glycerol-plasticized wheat gluten was explored for producing soft high-density biofoams using dry upscalable extrusion (avoiding purposely added water). The largest pore size was obtained when using the food grade ammonium bicarbonate (ABC) as blowing agent, also resulting in the highest saline liquid uptake. Foams were, however, also obtained without adding a blowing agent, possibly due to a rapid moisture uptake by the dried protein powder when fed to the extruder. ABC's low decomposition temperature enabled extrusion of the material at a temperature as low as 70 °C, well below the protein aggregation temperature. Sodium bicarbonate (SBC), the most common food-grade blowing agent, did not yield the same high foam qualities. SBC's alkalinity, and the need to use a higher processing temperature (120 °C), resulted in high protein cross-linking and aggregation. The results show the potential of an energy-efficient and industrially upscalable low-temperature foam extrusion process for competitive production of sustainable biofoams using inexpensive and readily available protein obtained from industrial biomass (wheat gluten).
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Affiliation(s)
- Mercedes A Bettelli
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm10044, Sweden
| | - Antonio J Capezza
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm10044, Sweden
| | - Fritjof Nilsson
- FSCN Research Centre, Mid Sweden University, Sundsvall85170, Sweden
| | - Eva Johansson
- Department of Plant Breeding, SLU Swedish University of Agriculture Sciences, Alnarp, Box 190 Lomma, SE-23422, Sweden
| | - Richard T Olsson
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm10044, Sweden
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm10044, Sweden
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18
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Lux J, Kieserling H, Koop J, Drusch S, Schwarz K, Keppler J, Steffen-Heins A. Identification of an optimized ratio of amyloid and non-amyloid fractions in engineered fibril solutions from whey protein isolate for improved foaming. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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19
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Mijin N, Milošević J, Stevanović S, Petrović P, Lolić A, Urbic T, Polović N. Amyloid-like aggregation influenced by lead(II) and cadmium(II) ions in hen egg white ovalbumin. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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An D, Ban Q, Du H, Wang Q, Teng F, Li L, Xiao H. Nanofibrils of food-grade proteins: Formation mechanism, delivery systems, and application evaluation. Compr Rev Food Sci Food Saf 2022; 21:4847-4871. [PMID: 36201382 DOI: 10.1111/1541-4337.13028] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/26/2022] [Accepted: 07/29/2022] [Indexed: 01/28/2023]
Abstract
Due to the high aspect ratio, appealing mechanical characteristics, and various adjustable functional groups on the surface proteins, food-grade protein nanofibrils have attracted great research interest in the field of food science. Fibrillation, known as a process of peptide self-assembly, is recognized as a common attribute for food-grade proteins. Converting food-grade proteins into nanofibrils is a promising strategy to broaden their functionality and applications, such as improvement of the properties of gelling and emulsifying, especially for constructing various delivery systems for bioactive compounds. Protein source and processing conditions have a great impact on the size, structure, and morphology of nanofibrils, resulting in extreme differences in functionality. With this feature, it is possible to engineer nanofibrils into four different delivery systems, including gels, microcapsules, emulsions, and complexes. Construction of nanofibril-based gels via multiple cross-linking methods can endow gels with special network structures to efficiently capture bioactive compounds and extra mechanical behavior. The adsorption behavior of nanofibrils at the interface is highly complex due to the influence of several intrinsic factors, which makes it challenging to form stabilized nanofibril-based emulsion systems. Based on electrostatic interactions, microcapsules and complexes prepared using nanofibrils and polysaccharides have combined functional properties, resulting in adjustable release behavior and higher encapsulation efficiency. The bioactive compounds delivery system based on nanofibrils is a potential solution to enhance their absorption in the gastrointestinal tract, improve their bioavailability, and deliver them to target organs. Although food-grade protein nanofibrils show unknown toxicity to humans, further research can contribute to broadening the application of nanofibrils in delivery systems.
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Affiliation(s)
- Di An
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Qingfeng Ban
- College of Food Science, Northeast Agricultural University, Harbin, China.,Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Hengjun Du
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Qi Wang
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
| | - Fei Teng
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Liang Li
- College of Food Science, Northeast Agricultural University, Harbin, China
| | - Hang Xiao
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts, USA
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21
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Jaklin M, Hritz J, Hribar-Lee B. A new fibrillization mechanism of β-lactoglobulin in glycine solutions. Int J Biol Macromol 2022; 216:414-425. [PMID: 35803407 PMCID: PMC10039397 DOI: 10.1016/j.ijbiomac.2022.06.182] [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: 03/23/2022] [Revised: 05/15/2022] [Accepted: 06/27/2022] [Indexed: 11/26/2022]
Abstract
Even though amyloid aggregates were discovered many years ago the mechanism of their formation is still a mystery. Because of their connection to many of untreatable neurodegenerative diseases the motivation for finding a common aggregation path is high. We report a new high heat induced fibrillization path of a model protein β-lactoglobulin (BLG) when incubated in glycine instead of water at pH 2. By combining atomic force microscopy (AFM), transmission emission microscopy (TEM), dynamic light scattering (DLS) and circular dichroism (CD) we predict that the basic building blocks of fibrils made in glycine are not peptides, but rather spheroid oligomers of different height that form by stacking of ring-like structures. Spheroid oligomers linearly align to form fibrils by opening up and combining. We suspect that glycine acts as an hydrolysation inhibitor which consequently promotes a different fibrillization path. By combining the known data on fibrillization in water with our experimental conclusions we come up with a new fibrillization scheme for BLG. We show that by changing the fibrillization conditions just by small changes in buffer composition can dramatically change the aggregation pathway and the effect of buffer shouldn't be neglected. Fibrils seen in our study are also gaining more and more attention because of their pore-like structure and a possible cytotoxic mechanism by forming pernicious ion-channels. By preparing them in a simple model system as BLG we opened a new way to study their formation.
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Affiliation(s)
- Matej Jaklin
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, Ljubljana SI-1000, Slovenia
| | - Jozef Hritz
- CEITEC Masaryk University Kamenice 5, Brno 625 00, Czech Republic; Department of Chemistry, Faculty of Science, Masaryk University Kamenice 5, Brno 625 00, Czech Republic
| | - Barbara Hribar-Lee
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, Ljubljana SI-1000, Slovenia.
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22
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Housmans JAJ, Houben B, Monge-Morera M, Asvestas D, Nguyen HH, Tsaka G, Louros N, Carpentier S, Delcour JA, Rousseau F, Schymkowitz J. Investigating the Sequence Determinants of the Curling of Amyloid Fibrils Using Ovalbumin as a Case Study. Biomacromolecules 2022; 23:3779-3797. [PMID: 36027608 DOI: 10.1021/acs.biomac.2c00660] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Highly ordered, straight amyloid fibrils readily lend themselves to structure determination techniques and have therefore been extensively characterized. However, the less ordered curly fibrils remain relatively understudied, and the structural organization underlying their specific characteristics remains poorly understood. We found that the exemplary curly fibril-forming protein ovalbumin contains multiple aggregation prone regions (APRs) that form straight fibrils when isolated as peptides or when excised from the full-length protein through hydrolysis. In the context of the intact full-length protein, however, the regions separating the APRs facilitate curly fibril formation. In fact, a meta-analysis of previously reported curly fibril-forming proteins shows that their inter-APRs are significantly longer and more hydrophobic when compared to straight fibril-forming proteins, suggesting that they may cause strain in the amyloid state. Hence, inter-APRs driving curly fibril formation may not only apply to our model protein but rather constitute a more general mechanism.
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Affiliation(s)
- Joëlle A J Housmans
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Bert Houben
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Margarita Monge-Morera
- Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Kasteelpark Arenberg 20, 3001 Leuven, Belgium
| | - Diego Asvestas
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Hung Huy Nguyen
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Grigoria Tsaka
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Nikolaos Louros
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Sebastien Carpentier
- Facility for Systems Biology Based Mass Spectrometry, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Jan A Delcour
- Laboratory of Food Chemistry and Biochemistry and Leuven Food Science and Nutrition Research Centre (LFoRCe), KU Leuven, Kasteelpark Arenberg 20, 3001 Leuven, Belgium
| | - Frederic Rousseau
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
| | - Joost Schymkowitz
- Switch Laboratory, VIB-KU Leuven Center for Brain & Disease Research, Herestraat 49, 3000 Leuven, Belgium.,Department of Cellular and Molecular Medicine, KU Leuven, Herestraat 49, box 802, 3000 Leuven, Belgium
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23
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Ye X, Capezza AJ, Davoodi S, Wei XF, Andersson RL, Chumakov A, Roth SV, Langton M, Lundell F, Hedenqvist MS, Lendel C. Robust Assembly of Cross-Linked Protein Nanofibrils into Hierarchically Structured Microfibers. ACS NANO 2022; 16:12471-12479. [PMID: 35904348 PMCID: PMC9413408 DOI: 10.1021/acsnano.2c03790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Natural, high-performance fibers generally have hierarchically organized nanosized building blocks. Inspired by this, whey protein nanofibrils (PNFs) are assembled into microfibers, using flow-focusing. By adding genipin as a nontoxic cross-linker to the PNF suspension before spinning, significantly improved mechanical properties of the final fiber are obtained. For curved PNFs, with a low content of cross-linker (2%) the fiber is almost 3 times stronger and 4 times stiffer than the fiber without a cross-linker. At higher content of genipin (10%), the elongation at break increases by a factor of 2 and the energy at break increases by a factor of 5. The cross-linking also enables the spinning of microfibers from long straight PNFs, which has not been achieved before. These microfibers have higher stiffness and strength but lower ductility and toughness than those made from curved PNFs. The fibers spun from the two classes of nanofibrils show clear morphological differences. The study demonstrates the production of protein-based microfibers with mechanical properties similar to natural protein-based fibers and provides insights about the role of the nanostructure in the assembly process.
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Affiliation(s)
- Xinchen Ye
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Antonio J. Capezza
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Saeed Davoodi
- Department
of Engineering Mechanics, KTH Royal Institute
of Technology, Teknikringen
8, SE-100 44, Stockholm, Sweden
| | - Xin-Feng Wei
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Richard L. Andersson
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Andrei Chumakov
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Stephan V. Roth
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
| | - Maud Langton
- Department
of Molecular Sciences, SLU, Swedish University
of Agricultural Sciences, BioCentrum, Almas allé 5, SE-756
61, Uppsala, Sweden
| | - Fredrik Lundell
- Department
of Engineering Mechanics, KTH Royal Institute
of Technology, Teknikringen
8, SE-100 44, Stockholm, Sweden
| | - Mikael S. Hedenqvist
- Department
of Fibre and Polymer Technology, KTH Royal
Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Christofer Lendel
- Department
of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44, Stockholm, Sweden
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24
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Vinayagam V, Murugan S, Kumaresan R, Narayanan M, Sillanpää M, Vo DVN, Kushwaha OS. Protein nanofibrils as versatile and sustainable adsorbents for an effective removal of heavy metals from wastewater: A review. CHEMOSPHERE 2022; 301:134635. [PMID: 35447212 DOI: 10.1016/j.chemosphere.2022.134635] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 03/26/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Water is a valuable natural resource, which plays a crucial role in ecological survival as well as economic progress. However, the water quality has deteriorated in recent years as a result of urbanization, industrialization and human activities due to the uncontrolled release of industrial wastes, which can be extremely carcinogenic and non-degradable, in air, water and soil bodies. Such wastes showed the presence of organic and inorganic pollutants in high dosages. Heavy metals are the most obstinate contaminants, and they can be harmful because of having a variety of detrimental consequences to the ecosystem. The existing water treatment methods in many situations may not be sustainable or effective because of their high energy requirements and ecological impacts. In this review, state-of-the-art water treatment methods for the elimination of heavy metals with the help of protein nanofibrils are covered featuring a discussion on the strategies and possibilities of developing protein nanofibrils for the active elimination of heavy metals using kitchen waste as well as residues from the cattle, agriculture, and dairy industries. Further, the emphasis has been given to their environmental sustainability and economical aspects are also discussed.
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Affiliation(s)
- Vignesh Vinayagam
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Shrima Murugan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Rishikeswaran Kumaresan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Meyyappan Narayanan
- Department of Chemical Engineering, Sri Venkateswara College of Engineering, Chennai, Tamil Nadu, 602117, India
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028, South Africa; Department of Biological and Chemical Engineering, Aarhus University, Nørrebrogade 44, 8000, Aarhus C, Denmark; Sustainable Membrane Technology Research Group (SMTRG), Chemical Engineering Department, Persian Gulf University, P.O. Box 75169-13817, Bushehr, Iran; Zhejiang Rongsheng Environmental Protection Paper Co. Ltd, No. 588 East Zhennan Road, Pinghu Economic Development Zone, Zhejiang, 314213, PR China
| | - Dai-Viet N Vo
- Institute of Environmental Sciences, Nguyen Tat Thanh University, Ho Chi Minh City, 755414, Viet Nam.
| | - Omkar Singh Kushwaha
- Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai, Tamil Nadu, 600036, India.
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25
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Hoppenreijs L, Fitzner L, Ruhmlieb T, Heyn T, Schild K, van der Goot AJ, Boom R, Steffen-Heins A, Schwarz K, Keppler J. Engineering amyloid and amyloid-like morphologies of β-lactoglobulin. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107301] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Kamada A, Herneke A, Lopez-Sanchez P, Harder C, Ornithopoulou E, Wu Q, Wei X, Schwartzkopf M, Müller-Buschbaum P, Roth SV, Hedenqvist MS, Langton M, Lendel C. Hierarchical propagation of structural features in protein nanomaterials. NANOSCALE 2022; 14:2502-2510. [PMID: 35103743 DOI: 10.1039/d1nr05571b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Natural high-performance materials have inspired the exploration of novel materials from protein building blocks. The ability of proteins to self-organize into amyloid-like nanofibrils has opened an avenue to new materials by hierarchical assembly processes. As the mechanisms by which proteins form nanofibrils are becoming clear, the challenge now is to understand how the nanofibrils can be designed to form larger structures with defined order. We here report the spontaneous and reproducible formation of ordered microstructure in solution cast films from whey protein nanofibrils. The structural features are directly connected to the nanostructure of the protein fibrils, which is itself determined by the molecular structure of the building blocks. Hence, a hierarchical assembly process ranging over more than six orders of magnitude in size is described. The fibril length distribution is found to be the main determinant of the microstructure and the assembly process originates in restricted capillary flow induced by the solvent evaporation. We demonstrate that the structural features can be switched on and off by controlling the length distribution or the evaporation rate without losing the functional properties of the protein nanofibrils.
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Affiliation(s)
- Ayaka Kamada
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44, Stockholm, Sweden.
| | - Anja Herneke
- Department of Molecular Sciences, SLU, Swedish University of Agricultural Sciences, BioCentrum, Almas allé 5, SE-756 61, Uppsala, Sweden
| | - Patricia Lopez-Sanchez
- Department of Molecular Sciences, SLU, Swedish University of Agricultural Sciences, BioCentrum, Almas allé 5, SE-756 61, Uppsala, Sweden
| | - Constantin Harder
- Deutsches Elektronen-Synchrotron, Notkestr. 85, D-22607 Hamburg, Germany
- Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - Eirini Ornithopoulou
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44, Stockholm, Sweden.
| | - Qiong Wu
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Xinfeng Wei
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | | | - Peter Müller-Buschbaum
- Heinz Maier-Leibniz Zentrum (MLZ), Technische Universität München, Lichtenbergstraße. 1, D-85748 Garching, Germany
- Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Str. 1, D-85748 Garching, Germany
| | - Stephan V Roth
- Deutsches Elektronen-Synchrotron, Notkestr. 85, D-22607 Hamburg, Germany
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44, Stockholm, Sweden
| | - Maud Langton
- Department of Molecular Sciences, SLU, Swedish University of Agricultural Sciences, BioCentrum, Almas allé 5, SE-756 61, Uppsala, Sweden
| | - Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44, Stockholm, Sweden.
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27
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Ha M, El-Din Bekhit A, McConnell M, Carne A. A simple method for enrichment of β-lactoglobulin from bovine milk whey involving selective hydrolysis by two fungal protease preparations. Food Chem 2022; 368:130820. [PMID: 34416488 DOI: 10.1016/j.foodchem.2021.130820] [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] [Received: 06/04/2021] [Revised: 08/06/2021] [Accepted: 08/06/2021] [Indexed: 01/01/2023]
Abstract
Two commercially available food grade fungal protease preparations (Fungal Protease 31,000 and Fungal Protease 60000) were found to hydrolyse bovine acid whey proteins but left the beta-lactoglobulin (β-Lg) intact under the processing conditions used. Comparative analysis before and after hydrolysis of bovine acid whey, by 1D- and 2D-PAGE, RP-HPLC and intact-mass mass spectrometry showed that the β-Lg remains intact and in high yield after hydrolysis by the fungal proteases. The β-Lg could be separated from the whey protein peptide hydrolysate by ultrafiltration. Subjecting whey fraction to hydrolysis with the fungal protease preparations provides a procedure, under relatively mild conditions, to generate a highly enriched β-Lg fraction. β-Lg is recognised as a valued material in the food, pharmaceutical and cosmetic industries due to its properties such as gelling and foaming. The enriched β-Lg preparation would also have application in areas such as nanoencapsulation.
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Affiliation(s)
- Minh Ha
- Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Melbourne, Australia
| | - Alaa El-Din Bekhit
- Department of Food Science, University of Otago, PO Box 56, Dunedin, New Zealand.
| | - Michelle McConnell
- Department of Microbiology and Immunology, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Alan Carne
- Department of Biochemistry, University of Otago, PO Box 56, Dunedin, New Zealand
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28
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Lendel C, Solin N. Protein nanofibrils and their use as building blocks of sustainable materials. RSC Adv 2021; 11:39188-39215. [PMID: 35492452 PMCID: PMC9044473 DOI: 10.1039/d1ra06878d] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 11/25/2021] [Indexed: 12/21/2022] Open
Abstract
The development towards a sustainable society requires a radical change of many of the materials we currently use. Besides the replacement of plastics, derived from petrochemical sources, with renewable alternatives, we will also need functional materials for applications in areas ranging from green energy and environmental remediation to smart foods. Proteins could, with their intriguing ability of self-assembly into various forms, play important roles in all these fields. To achieve that, the code for how to assemble hierarchically ordered structures similar to the protein materials found in nature must be cracked. During the last decade it has been demonstrated that amyloid-like protein nanofibrils (PNFs) could be a steppingstone for this task. PNFs are formed by self-assembly in water from a range of proteins, including plant resources and industrial side streams. The nanofibrils display distinct functional features and can be further assembled into larger structures. PNFs thus provide a framework for creating ordered, functional structures from the atomic level up to the macroscale. This review address how industrial scale protein resources could be transformed into PNFs and further assembled into materials with specific mechanical and functional properties. We describe what is required from a protein to form PNFs and how the structural properties at different length scales determine the material properties. We also discuss potential chemical routes to modify the properties of the fibrils and to assemble them into macroscopic structures.
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Affiliation(s)
- Christofer Lendel
- Department of Chemistry, KTH Royal Institute of Technology Teknikringen 30 SE-100 44 Stockholm Sweden
| | - Niclas Solin
- Department of Physics, Chemistry, and Biology, Electronic and Photonic Materials, Biomolecular and Organic Electronics, Linköping University Linköping 581 83 Sweden
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29
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Gowda V, Biler M, Filippov A, Mantonico MV, Ornithopoulou E, Linares M, Antzutkin ON, Lendel C. Structural characterisation of amyloid-like fibrils formed by an amyloidogenic peptide segment of β-lactoglobulin. RSC Adv 2021; 11:27868-27879. [PMID: 35480736 PMCID: PMC9037834 DOI: 10.1039/d1ra03575d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/09/2021] [Indexed: 12/11/2022] Open
Abstract
Protein nanofibrils (PNFs) represent a promising class of biobased nanomaterials for biomedical and materials science applications. In the design of such materials, a fundamental understanding of the structure–function relationship at both molecular and nanoscale levels is essential. Here we report investigations of the nanoscale morphology and molecular arrangement of amyloid-like PNFs of a synthetic peptide fragment consisting of residues 11–20 of the protein β-lactoglobulin (β-LG11–20), an important model system for PNF materials. Nanoscale fibril morphology was analysed by atomic force microscopy (AFM) that indicates the presence of polymorphic self-assembly of protofilaments. However, observation of a single set of 13C and 15N resonances in the solid-state NMR spectra for the β-LG11–20 fibrils suggests that the observed polymorphism originates from the assembly of protofilaments at the nanoscale but not from the molecular structure. The secondary structure and inter-residue proximities in the β-LG11–20 fibrils were probed using NMR experiments of the peptide with 13C- and 15N-labelled amino acid residues at selected positions. We can conclude that the peptides form parallel β-sheets, but the NMR data was inconclusive regarding inter-sheet packing. Molecular dynamics simulations confirm the stability of parallel β-sheets and suggest two preferred modes of packing. Comparison of molecular dynamics models with NMR data and calculated chemical shifts indicates that both packing models are possible. A 10-residue peptide segment of β-lactoglobulin (β-LG11–20) forms amyloid-like fibrils as revealed by AFM, NMR, and MD simulations.![]()
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Affiliation(s)
- Vasantha Gowda
- Dept. of Chemistry, KTH Royal Institute of Technology Stockholm Sweden
| | - Michal Biler
- Dept. of Theoretical Chemistry, KTH Royal Institute of Technology Stockholm Sweden
| | - Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology Sweden.,Dept. Medical and Biological Physics, Kazan State Medical University 420012 Kazan Russia
| | | | | | - Mathieu Linares
- Dept. of Theoretical Chemistry, KTH Royal Institute of Technology Stockholm Sweden.,Laboratory of Organic Electronics and Group of Scientific Visualization, ITN, Linköping University 60174 Norrköping Sweden.,Swedish e-Science Research Centre (SeRC), Linköping University 60174 Norrköping Sweden
| | - Oleg N Antzutkin
- Chemistry of Interfaces, Luleå University of Technology Sweden.,Dept. of Physics, University of Warwick Coventry UK
| | - Christofer Lendel
- Dept. of Chemistry, KTH Royal Institute of Technology Stockholm Sweden
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30
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Niu H, Hou X, Zhang Y, Wu X, Deng F, Huang F, Shi L, Ma R. Self-Assembled Nanochaperones Inhibit the Aggregation of Human Islet Amyloid Polypeptide Associated with Type 2 Diabetes. ACS Macro Lett 2021; 10:662-670. [PMID: 35549098 DOI: 10.1021/acsmacrolett.1c00200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Human islet amyloid polypeptide (hIAPP) aggregation is closely associated with dysfunction and apoptosis of pancreatic β-cells in type 2 diabetes (T2D). Accordingly, hIAPP amyloid inhibitors have shown promise against T2D. Here, by mimicking the function of natural molecular chaperones, nanochaperones (nChaps) based on self-assembled polymeric micelles with tunable surface microdomains for T2D treatment are reported. By capturing the aggregation-prone species of hIAPP onto the hydrophobic microdomains and segregating them by hydrophilic PEG chains, this kind of nChaps could effectively prevent hIAPP aggregation, block cell adhesion of hIAPP, facilitate hIAPP aggregates degradation and reduce hIAPP-related cytotoxicity. Therefore, our work will provide useful insights to develop a biomimetic strategy for the treatment of T2D.
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Affiliation(s)
- Haihong Niu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaoxue Hou
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Yanli Zhang
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiaohui Wu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fei Deng
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Fan Huang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China
| | - Linqi Shi
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Rujiang Ma
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials of Ministry of Education, College of Chemistry, Nankai University, Tianjin 300071, China
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31
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Capezza AJ, Muneer F, Prade T, Newson WR, Das O, Lundman M, Olsson RT, Hedenqvist MS, Johansson E. Acylation of agricultural protein biomass yields biodegradable superabsorbent plastics. Commun Chem 2021; 4:52. [PMID: 36697586 PMCID: PMC9814733 DOI: 10.1038/s42004-021-00491-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 03/16/2021] [Indexed: 01/28/2023] Open
Abstract
Superabsorbent polymers (SAP) are a central component of hygiene and medical products requiring high liquid swelling, but these SAP are commonly derived from petroleum resources. Here, we show that sustainable and biodegradable SAP can be produced by acylation of the agricultural potato protein side-stream (PPC) with a non-toxic dianhydride (EDTAD). Treatment of the PPC yields a material with a water swelling capacity of ca. 2400%, which is ten times greater than the untreated PPC. Acylation was also performed on waste potato fruit juice (PFJ), i.e. before the industrial treatment to precipitate the PPC. The use of PFJ for the acylation implies a saving of 320 000 tons as CO2 in greenhouse gas emissions per year by avoiding the industrial drying of the PFJ to obtain the PPC. The acylated PPC shows biodegradation and resistance to mould growth. The possibilities to produce a biodegradable SAP from the PPC allows for future fabrication of environment-friendly and disposable daily-care products, e.g. diapers and sanitary pads.
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Affiliation(s)
- Antonio J. Capezza
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden ,Plant Breeding Department, SLU Alnarp, Lomma, Sweden
| | - Faraz Muneer
- Plant Breeding Department, SLU Alnarp, Lomma, Sweden
| | - Thomas Prade
- Biosystems and Technology Department, SLU Alnarp, Lomma, Sweden
| | | | - Oisik Das
- grid.6926.b0000 0001 1014 8699Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering Division, Luleå University of Technology, Luleå, Sweden
| | | | - Richard T. Olsson
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Mikael S. Hedenqvist
- grid.5037.10000000121581746Fibre and Polymer Technology Department, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Eva Johansson
- Plant Breeding Department, SLU Alnarp, Lomma, Sweden
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32
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Ye X, Capezza AJ, Xiao X, Lendel C, Hedenqvist MS, Kessler VG, Olsson RT. Protein Nanofibrils and Their Hydrogel Formation with Metal Ions. ACS NANO 2021; 15:5341-5354. [PMID: 33666436 PMCID: PMC8041371 DOI: 10.1021/acsnano.0c10893] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Protein nanofibrils (PNFs) have been prepared by whey protein fibrillation at low pH and in the presence of different metal ions. The effect of the metal ions was systematically studied both in terms of PNF suspension gelation behavior and fibrillation kinetics. A high valence state and a small ionic radius (e.g., Sn4+) of the metal ion resulted in the formation of hydrogels already at a metal ion concentration of 30 mM, whereas an intermediate valence state and larger ionic radius (Co2+, Ni2+, Al3+) resulted in the hydrogel formation occurring at 60 mM. A concentration of 120 mM of Na+ was needed to form a PNF hydrogel, while lower concentrations showed liquid behaviors similar to the reference PNF solution where no metal ions had been introduced. The hydrogel mechanics were investigated at steady-state conditions after 24 h of incubation/gelation, revealing that more acidic (smaller and more charged) metal ions induced ca. 2 orders of magnitude higher storage modulus as compared to the less acidic metal ions (with smaller charge and larger radius) for the same concentration of metal ions. The viscoelastic nature of the hydrogels was attributed to the ability of the metal ions to coordinate water molecules in the vicinity of the PNFs. The presence of metal ions in the solutions during the growth of the PNFs typically resulted in curved fibrils, whereas an upper limit of the concentration existed when oxides/hydroxides were formed, and the hydrogels lost their gel properties due to phase separation. Thioflavin T (ThT) fluorescence was used to determine the rate of the fibrillation to form 50% of the total PNFs (t1/2), which decreased from 2.3 to ca. 0.5 h depending on the specific metal ions added.
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Affiliation(s)
- Xinchen Ye
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Antonio J. Capezza
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Xiong Xiao
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Christofer Lendel
- Department
of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology,
and Health, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
| | - Mikael S. Hedenqvist
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Vadim G. Kessler
- Department
of Molecular Sciences, Swedish University
of Agricultural Sciences, Box 7015, 750 07 Uppsala, Sweden
| | - Richard T. Olsson
- Department
of Fibre and Polymer Technology, School of Engineering Sciences in
Chemistry, Biotechnology and Health, KTH
Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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33
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Hauser J, Kylberg G, Colomb-Delsuc M, Stemme G, Sintorn IM, Roxhed N. A microfluidic device for TEM sample preparation. LAB ON A CHIP 2020; 20:4186-4193. [PMID: 33033812 DOI: 10.1039/d0lc00724b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Transmission electron microscopy (TEM) allows for visualizing and analyzing viral particles and has become a vital tool for the development of vaccines and biopharmaceuticals. However, appropriate TEM sample preparation is typically done manually which introduces operator-based dependencies and can lead to unreliable results. Here, we present a capillary-driven microfluidic single-use device that prepares a TEM grid with minimal and non-critical user interaction. The user only initiates the sample preparation process, waits for about one minute and then collects the TEM grid, ready for imaging. Using Adeno-associated virus (AAV) particles as the sample and NanoVan® as the stain, we demonstrate microfluidic consistency and show that the sample preparation quality is sufficient for automated image analysis. We further demonstrate the versatility of the microfluidic device by preparing two protein complexes for TEM investigations using two different stain types. The presented TEM sample preparation concept could alleviate the problems associated with human inconsistency in manual preparation protocols and allow for non-specialists to prepare TEM samples.
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Affiliation(s)
- Janosch Hauser
- Division of Micro and Nanosystems, KTH Royal Institute of Technology, 10044 Stockholm, Sweden.
| | | | | | - Göran Stemme
- Division of Micro and Nanosystems, KTH Royal Institute of Technology, 10044 Stockholm, Sweden.
| | | | - Niclas Roxhed
- Division of Micro and Nanosystems, KTH Royal Institute of Technology, 10044 Stockholm, Sweden.
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34
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Heyn TR, Mayer J, Neumann HR, Selhuber-Unkel C, Kwade A, Schwarz K, Keppler JK. The threshold of amyloid aggregation of beta-lactoglobulin: Relevant factor combinations. J FOOD ENG 2020. [DOI: 10.1016/j.jfoodeng.2020.110005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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35
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Rabe R, Hempel U, Martocq L, Keppler JK, Aveyard J, Douglas TEL. Dairy-Inspired Coatings for Bone Implants from Whey Protein Isolate-Derived Self-Assembled Fibrils. Int J Mol Sci 2020; 21:E5544. [PMID: 32756331 PMCID: PMC7432503 DOI: 10.3390/ijms21155544] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/24/2020] [Accepted: 07/28/2020] [Indexed: 12/15/2022] Open
Abstract
To improve the integration of a biomaterial with surrounding tissue, its surface properties may be modified by adsorption of biomacromolecules, e.g., fibrils. Whey protein isolate (WPI), a dairy industry by-product, supports osteoblastic cell growth. WPI's main component, β-lactoglobulin, forms fibrils in acidic solutions. In this study, aiming to develop coatings for biomaterials for bone contact, substrates were coated with WPI fibrils obtained at pH 2 or 3.5. Importantly, WPI fibrils coatings withstood autoclave sterilization and appeared to promote spreading and differentiation of human bone marrow stromal cells (hBMSC). In the future, WPI fibrils coatings could facilitate immobilization of biomolecules with growth stimulating or antimicrobial properties.
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Affiliation(s)
- Rebecca Rabe
- Division of Food Technology, Kiel University, 24118 Kiel, Germany; (R.R.); (J.K.K.)
| | - Ute Hempel
- Institute of Physiological Chemistry, Technische Universität Dresden, 01069 Dresden, Germany;
| | - Laurine Martocq
- Engineering Department, Lancaster University, Lancaster LA1 4YW, UK;
| | - Julia K. Keppler
- Division of Food Technology, Kiel University, 24118 Kiel, Germany; (R.R.); (J.K.K.)
- Laboratory of Food Process Engineering, Wageningen University & Research AFSG, 6708 PB Wageningen, The Netherlands
| | - Jenny Aveyard
- School of Engineering, University of Liverpool, Liverpool L69 3BX, UK;
| | - Timothy E. L. Douglas
- Engineering Department, Lancaster University, Lancaster LA1 4YW, UK;
- Materials Science Institute (MSI), Lancaster University, Lancaster LA1 4YW, UK
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36
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Capezza AJ, Lundman M, Olsson RT, Newson WR, Hedenqvist MS, Johansson E. Carboxylated Wheat Gluten Proteins: A Green Solution for Production of Sustainable Superabsorbent Materials. Biomacromolecules 2020; 21:1709-1719. [PMID: 31899621 DOI: 10.1021/acs.biomac.9b01646] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Functionalized wheat gluten (WG) protein particles with the ability to absorb fluids within the superabsorbent range are presented. Ethyleneditetraacetic dianhydride (EDTAD), a nontoxic acylation agent, was used for the functionalization of the WG protein at higher protein content than previously reported and no additional chemical cross-linking. The 150-550 μm protein particles had 50-150 nm nanopores induced by drying. The EDTAD treated WG were able to absorb 22, 5, and 3 times of, respectively, water, saline and blood, per gram of dry material (g/g), corresponding to 1000, 150 and 100% higher values than for the as-received WG powder. The liquid retention capacity after centrifugation revealed that almost 50% of the saline liquid was retained within the protein network, which is similar to that for petroleum-based superabsorbent polymers (SAPs). An advantageous feature of these biobased particulate materials is that the maximum swelling is obtained within the first 10 min of exposure, that is, in contrast to many commercial SAP alternatives. The large swelling in a denaturation agent (6 M urea) solution (about 32 g/g) suggests that the secondary entangled/folded structure of the protein restricts protein network expansion and when disrupted allows the absorption of even higher amounts of liquid. The increased liquid uptake, utilization of inexpensive protein coproducts, easy scalable protocols, and absence of any toxic chemicals make these new WG-based SAP particles an interesting alternative to petroleum-based SAP in, for example, absorbent disposable hygiene products.
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Affiliation(s)
- Antonio J Capezza
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden.,Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
| | - Malin Lundman
- Essity Hygiene and Health AB, SE-405 03, Gothenburg, Sweden
| | - Richard T Olsson
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - William R Newson
- Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
| | - Mikael S Hedenqvist
- Department of Fibre and Polymer Technology, Polymeric Materials Division, School of Engineering Sciences in Chemistry, Biotechnology, and Health, KTH Royal Institute of Technology, Stockholm 10044, Sweden
| | - Eva Johansson
- Department of Plant Breeding, Faculty of Landscape Planning, Horticulturem and Crop Production Sciences, SLU Swedish University of Agricultural Sciences, Alnarp 23053, Sweden
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37
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Capezza A, Wu Q, Newson WR, Olsson RT, Espuche E, Johansson E, Hedenqvist MS. Superabsorbent and Fully Biobased Protein Foams with a Natural Cross-Linker and Cellulose Nanofibers. ACS OMEGA 2019; 4:18257-18267. [PMID: 31720526 PMCID: PMC6844118 DOI: 10.1021/acsomega.9b02271] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 09/18/2019] [Indexed: 05/06/2023]
Abstract
The development of fully natural wheat gluten foams showing rapid and high uptake of water, sheep blood, and saline solution, while maintaining high mechanical stability in the swollen state, is presented. Genipin was added as a natural and polar cross-linker to increase the polarity of the protein chains, whereas cellulose nanofibers (CNFs) were added as a reinforcement/stiffener of the foams, alone or in combination with the genipin. The presence of only genipin resulted in a foam that absorbed up to 25 g of water per gram of foam and a more than 15 g uptake in only 8 min. In contrast, with CNF alone, it was not possible to maintain the mechanical stability of the foam during the water uptake and the protein foam disintegrated. The combination of CNF and genipin yielded a material with the best mechanical stability of the tested samples. In the latter case, the foam could be compressed repeatedly more than 80% without displaying any structural damage. The results revealed that a strong network had formed between the wheat gluten matrix, genipin, and cellulose in the foam structure. A unique feature of the absorbent/foam, in contrast to commercial superabsorbents, was that it was able to rapidly absorb nonpolar liquids (here, n-heptane) due to the open-cell structure. The capillary-driven absorption due to the open-cell structure, the high liquid absorption in the cell walls, and the mechanical properties (both in dry and swollen states) of these natural foams make them interesting as a sustainable replacement for a range of petroleum-based foam materials, including absorbent hygiene products such as sanitary pads.
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Affiliation(s)
- Antonio
J. Capezza
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Fibre
and Polymer Technology, KTH Royal Institute
of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
- Department
of Plant Breeding, SLU Swedish University
of Agricultural Sciences, Sundsvägen 10, P.O. Box
101, SE-230 53 Alnarp, Sweden
| | - Qiong Wu
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Fibre
and Polymer Technology, KTH Royal Institute
of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
| | - William R. Newson
- Department
of Plant Breeding, SLU Swedish University
of Agricultural Sciences, Sundsvägen 10, P.O. Box
101, SE-230 53 Alnarp, Sweden
| | - Richard T. Olsson
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Fibre
and Polymer Technology, KTH Royal Institute
of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
| | - Eliane Espuche
- Ingénierie
des Matériaux Polymères, Univ
Lyon, Université Lyon1, UMR CNRS 5223, Bâtiment Polytech, 15, Bd. André Latarjet, 69622 Villeurbanne Cedex, France
| | - Eva Johansson
- Department
of Plant Breeding, SLU Swedish University
of Agricultural Sciences, Sundsvägen 10, P.O. Box
101, SE-230 53 Alnarp, Sweden
| | - Mikael S. Hedenqvist
- School
of Engineering Sciences in Chemistry, Biotechnology and Health, Fibre
and Polymer Technology, KTH Royal Institute
of Technology, Teknikringen 56, SE-100 44 Stockholm, Sweden
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38
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Heyn TR, Garamus VM, Neumann HR, Uttinger MJ, Guckeisen T, Heuer M, Selhuber-Unkel C, Peukert W, Keppler JK. Influence of the polydispersity of pH 2 and pH 3.5 beta-lactoglobulin amyloid fibril solutions on analytical methods. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.08.038] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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39
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Li J, Pylypchuk I, Johansson DP, Kessler VG, Seisenbaeva GA, Langton M. Self-assembly of plant protein fibrils interacting with superparamagnetic iron oxide nanoparticles. Sci Rep 2019; 9:8939. [PMID: 31222107 PMCID: PMC6586877 DOI: 10.1038/s41598-019-45437-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 06/05/2019] [Indexed: 11/09/2022] Open
Abstract
In situ fibrillation of plant proteins in presence of the superparamagnetic iron oxide nanoparticles (NP) promoted formation of a hybrid nanocomposite. The morphology of NP-fibril composite was revealed using ex-situ atomic force microscopy (AFM) in air. The NP-fibrils were associated into extended multi-fibril structures, indicating that the addition of NPs promoted protein association via β-sheet assembly. Real-time movement of NPs attached to fibrils under an external magnetic field was visualized using in-situ AFM in liquid, revealing that composite structures were stable at low pH, and displaying dipolar property of the NPs in the composite at high pH. Changes in magnetic properties of NPs when interacting with protein fibrils were quantitatively mapped using magnetic force microscopy (MFM). The magnetic moment of the NPs in composite was increased by co-existing with protein at low pH, while their dipolar nature was maintained at high pH. Self-assembly of the protein into fibrils is accelerated with increasing NP concentration within an optimal range, which is attributed to a fibrillation-competent conformation of the peptides. The latter was explained by the formation of favorable hydrogen bonds, electrostatic interactions, and efficient surface energy transfer between NPs and proteins.
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Affiliation(s)
- Jing Li
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
| | - Ievgen Pylypchuk
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Daniel P Johansson
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Vadim G Kessler
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden
| | - Gulaim A Seisenbaeva
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
| | - Maud Langton
- The Department of Molecular Sciences, SLU - Swedish University of Agricultural Sciences, Box 7015, SE-750 07, Uppsala, Sweden.
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40
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Keppler JK, Heyn TR, Meissner PM, Schrader K, Schwarz K. Protein oxidation during temperature-induced amyloid aggregation of beta-lactoglobulin. Food Chem 2019; 289:223-231. [PMID: 30955606 DOI: 10.1016/j.foodchem.2019.02.114] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 02/28/2019] [Accepted: 02/28/2019] [Indexed: 01/19/2023]
Abstract
Although the connection between protein oxidation, amyloid aggregation and diseases such as Alzheimer's is well known there is no information on such effects during preparation of beta-lactoglobulin fibrils. Different morphologies of amyloid aggregates of beta-lactoglobulin were prepared by incubation at pH 2 or pH 3.5 for up to 72 h. After 5 h, amyloid aggregates at pH 2 formed typical fibrils, which consisted of peptides. At pH 3.5, the amyloid aggregates were worm-like and consisted of intact protein. After 72 h, the building blocks at both pH values changed towards smaller peptides. The apparent tyrosine oxidation reached a maximum after 5 h at both pH values, whereas N-formylkynurenine and carbonyls increased continuously during 72 h. In case amyloid structures are used as edible material, the health related effects caused by protein oxidation needs to be considered.
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Affiliation(s)
- Julia K Keppler
- Institute of Human Nutrition and Food Science, Division of Food Technology, Kiel University, 24118 Kiel, Germany.
| | - Timon R Heyn
- Institute of Human Nutrition and Food Science, Division of Food Technology, Kiel University, 24118 Kiel, Germany
| | - Philipp M Meissner
- Institute of Human Nutrition and Food Science, Division of Food Technology, Kiel University, 24118 Kiel, Germany
| | - Katrin Schrader
- Department of Safety and Quality of Milk and Fish Products, Max Rubner-Institut, Kiel, Germany
| | - Karin Schwarz
- Institute of Human Nutrition and Food Science, Division of Food Technology, Kiel University, 24118 Kiel, Germany
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41
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Josefsson L, Cronhamn M, Ekman M, Widehammar H, Emmer Å, Lendel C. Structural basis for the formation of soy protein nanofibrils. RSC Adv 2019; 9:6310-6319. [PMID: 35517292 PMCID: PMC9060953 DOI: 10.1039/c8ra10610j] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/15/2019] [Indexed: 11/25/2022] Open
Abstract
Amyloid-like protein nanofibrils (PNFs) can assemble from a range of different proteins including disease-associated proteins, functional amyloid proteins and several proteins for which the PNFs are neither related to disease nor function. We here examined the core building blocks of PNFs formed by soy proteins. Fibril formation at pH 2 and 90 °C is coupled to peptide hydrolysis which allows isolation of the PNF-forming peptides and identification of them by mass spectrometry. We found five peptides that constitute the main building blocks in soy PNFs, three of them from the protein β-conglycinin and two from the protein glycinin. The abilities of these peptides to form PNFs were addressed by amyloid prediction software and by PNF formation of the corresponding synthetic peptides. Analysis of the structural context in the native soy proteins revealed two structural motifs for the PNF-forming peptides: (i) so-called β-arches and (ii) helical segments involved in quaternary structure contacts. However, the results suggest that neither the native structural motifs nor the protein of origin defines the morphology of the PNFs formed from soy protein isolate. Identification of the peptide building blocks of soy protein nanofibrils provides new clues about the determinants of protein nanofibril morphology.![]()
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Affiliation(s)
- Leila Josefsson
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Melker Cronhamn
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Malin Ekman
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Hugo Widehammar
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Åsa Emmer
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
| | - Christofer Lendel
- Department of Chemistry
- KTH Royal Institute of Technology
- Stockholm
- Sweden
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42
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Hasecke F, Miti T, Perez C, Barton J, Schölzel D, Gremer L, Grüning CSR, Matthews G, Meisl G, Knowles TPJ, Willbold D, Neudecker P, Heise H, Ullah G, Hoyer W, Muschol M. Origin of metastable oligomers and their effects on amyloid fibril self-assembly. Chem Sci 2018; 9:5937-5948. [PMID: 30079208 PMCID: PMC6050532 DOI: 10.1039/c8sc01479e] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 06/12/2018] [Indexed: 01/05/2023] Open
Abstract
Assembly of rigid amyloid fibrils with their characteristic cross-β sheet structure is a molecular signature of numerous neurodegenerative and non-neuropathic disorders. Frequently large populations of small globular amyloid oligomers (gOs) and curvilinear fibrils (CFs) precede the formation of late-stage rigid fibrils (RFs), and have been implicated in amyloid toxicity. Yet our understanding of the origin of these metastable oligomers, their role as on-pathway precursors or off-pathway competitors, and their effects on the self-assembly of amyloid fibrils remains incomplete. Using two unrelated amyloid proteins, amyloid-β and lysozyme, we find that gO/CF formation, analogous to micelle formation by surfactants, is delineated by a "critical oligomer concentration" (COC). Below this COC, fibril assembly replicates the sigmoidal kinetics of nucleated polymerization. Upon crossing the COC, assembly kinetics becomes biphasic with gO/CF formation responsible for the lag-free initial phase, followed by a second upswing dominated by RF nucleation and growth. RF lag periods below the COC, as expected, decrease as a power law in monomer concentration. Surprisingly, the build-up of gO/CFs above the COC causes a progressive increase in RF lag periods. Our results suggest that metastable gO/CFs are off-pathway from RF formation, confined by a condition-dependent COC that is distinct from RF solubility, underlie a transition from sigmoidal to biphasic assembly kinetics and, most importantly, not only compete with RFs for the shared monomeric growth substrate but actively inhibit their nucleation and growth.
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Affiliation(s)
- Filip Hasecke
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
| | - Tatiana Miti
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
| | - Carlos Perez
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
| | - Jeremy Barton
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
| | - Daniel Schölzel
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Lothar Gremer
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Clara S R Grüning
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
| | - Garrett Matthews
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
| | - Georg Meisl
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK
| | - Tuomas P J Knowles
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , UK
| | - Dieter Willbold
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Philipp Neudecker
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Henrike Heise
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Ghanim Ullah
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
| | - Wolfgang Hoyer
- Institut für Physikalische Biologie , Heinrich-Heine-Universität , 40204 Düsseldorf , Germany .
- Institute of Complex Systems (ICS-6) , Structural Biochemistry , Research Centre Jülich , Germany
| | - Martin Muschol
- Department of Physics , University of South Florida , Tampa , FL 33620 , USA .
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43
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Loveday SM, Gunning AP. Nanomechanics of Pectin-Linked β-Lactoglobulin Nanofibril Bundles. Biomacromolecules 2018; 19:2834-2840. [DOI: 10.1021/acs.biomac.8b00408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simon M. Loveday
- Food and Bio-based
Products Group, AgResearch Limited, Private Bag 11008, Palmerston North, 4442, New Zealand
- Riddet Institute Centre of Research Excellence, Massey University, Palmerston North 4442, New Zealand
| | - A. Patrick Gunning
- Quadram Institute Bioscience, Norwich Research
Park, Norwich, Norfolk NR4 7UA, U.K
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