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Wacławska M, Guza M, Ścibisz G, Fortunka M, Dec R, Puławski W, Dzwolak W. Reversible Freeze-Induced β-Sheet-to-Disorder Transition in Aggregated Homopolypeptide System. J Phys Chem B 2019; 123:9080-9086. [DOI: 10.1021/acs.jpcb.9b06097] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Matylda Wacławska
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
| | - Marcin Guza
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
| | - Grzegorz Ścibisz
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
| | - Mateusz Fortunka
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
| | - Robert Dec
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
| | - Wojciech Puławski
- Institute of High Pressure Physics, Polish Academy of Sciences, Sokołowska 29/37 Str., Warsaw 01-142, Poland
| | - Wojciech Dzwolak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., Warsaw 02-093, Poland
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Kluz M, Nieznańska H, Dec R, Dzięcielewski I, Niżyński B, Ścibisz G, Puławski W, Staszczak G, Klein E, Smalc-Koziorowska J, Dzwolak W. Revisiting the conformational state of albumin conjugated to gold nanoclusters: A self-assembly pathway to giant superstructures unraveled. PLoS One 2019; 14:e0218975. [PMID: 31247048 PMCID: PMC6597083 DOI: 10.1371/journal.pone.0218975] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/12/2019] [Indexed: 11/21/2022] Open
Abstract
Bovine serum albumin (BSA) is often employed as a proteinaceous component for synthesis of luminescent protein-stabilized gold nanoclusters (AuNC): intriguing systems with many potential applications. Typically, the formation of BSA-AuNC conjugate occurs under strongly alkaline conditions. Due to the sheer complexity of intertwined chemical and structural transitions taking place upon BSA-AuNC formation, the state of albumin enveloping AuNCs remains poorly characterized. Here, we study the conformational properties of BSA bound to AuNCs using an array of biophysical tools including vibrational spectroscopy, circular dichroism, fluorescence spectroscopy and trypsin digestion. The alkaline conditions of BSA-AuNC self-assembly appear to be primary responsible for the profound irreversible disruption of tertiary contacts, partial unfolding of native α-helices, hydrolysis of disulfide bonds and the protein becoming vulnerable to trypsin digestion. Further unfolding of BSA-AuNC by guanidinium hydrochloride (GdnHCl) is fully reversible equally in terms of albumin's secondary structure and conjugate's luminescent properties. This suggests that binding to AuNCs traps the albumin molecule in a state that is both partly disordered and refractory to irreversible misfolding. Indeed, when BSA-AuNC is subjected to conditions favoring self-association of BSA into amyloid-like fibrils, the buildup of non-native β-sheet conformation is less pronounced than in a control experiment with unmodified BSA. Unexpectedly, BSA-AuNC reveals a tendency to self-assemble into giant twisted superstructures of micrometer lengths detectable with transmission electron microscopy (TEM), a property absent in unmodified BSA. The process is accompanied by ordering of bound AuNCs into elongated streaks and simultaneous decrease in fluorescence intensity. The newly discovered self-association pathway appears to be specifically accessible to protein molecules with a certain restriction on structural dynamics which in the case of BSA-AuNC arises from binding to metal nanoclusters. Our results have been discussed in the context of mechanisms of protein misfolding and applications of BSA-AuNC.
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MESH Headings
- Amino Acid Sequence
- Animals
- Cattle
- Circular Dichroism
- Gold/chemistry
- Metal Nanoparticles/chemistry
- Metal Nanoparticles/ultrastructure
- Microscopy, Atomic Force
- Microscopy, Electron, Scanning
- Microscopy, Electron, Transmission
- Models, Molecular
- Protein Aggregates
- Protein Conformation
- Protein Denaturation
- Protein Stability
- Serum Albumin, Bovine/chemistry
- Serum Albumin, Bovine/genetics
- Serum Albumin, Bovine/ultrastructure
- Spectrometry, Fluorescence
- Spectroscopy, Fourier Transform Infrared
- Spectrum Analysis, Raman
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Affiliation(s)
- Michał Kluz
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Hanna Nieznańska
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland
| | - Robert Dec
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Igor Dzięcielewski
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Bartosz Niżyński
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Grzegorz Ścibisz
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Wojciech Puławski
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Grzegorz Staszczak
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | - Ewelina Klein
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
| | | | - Wojciech Dzwolak
- Institute of High Pressure Physics, Polish Academy of Sciences, Warsaw, Poland
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
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Berbeć S, Dec R, Molodenskiy D, Wielgus-Kutrowska B, Johannessen C, Hernik-Magoń A, Tobias F, Bzowska A, Ścibisz G, Keiderling TA, Svergun D, Dzwolak W. β2-Type Amyloidlike Fibrils of Poly-l-glutamic Acid Convert into Long, Highly Ordered Helices upon Dissolution in Dimethyl Sulfoxide. J Phys Chem B 2018; 122:11895-11905. [DOI: 10.1021/acs.jpcb.8b08308] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sylwia Berbeć
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Robert Dec
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Dmitry Molodenskiy
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Hamburg 22607, Germany
| | - Beata Wielgus-Kutrowska
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw 02-093, Poland
| | | | - Agnieszka Hernik-Magoń
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Fernando Tobias
- Department of Chemistry, University of Illinois at Chicago, Chicago 60607-7061, United States
| | - Agnieszka Bzowska
- Division of Biophysics, Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw 02-093, Poland
| | - Grzegorz Ścibisz
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
| | - Timothy A. Keiderling
- Department of Chemistry, University of Illinois at Chicago, Chicago 60607-7061, United States
| | - Dmitri Svergun
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Hamburg 22607, Germany
| | - Wojciech Dzwolak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Street, 02-093 Warsaw, Poland
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Ścibisz G, Dec R, Dzwolak W. Mellitate: A multivalent anion with extreme charge density causes rapid aggregation and misfolding of wild type lysozyme at neutral pH. PLoS One 2017; 12:e0187328. [PMID: 29084264 PMCID: PMC5662172 DOI: 10.1371/journal.pone.0187328] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 10/17/2017] [Indexed: 02/05/2023] Open
Abstract
Due to its symmetric structure and abundance of carboxyl groups, mellitic acid (MA–benzenehexacarboxylic acid) has an uncommon capacity to form highly ordered molecular networks. Dissolved in water, MA dissociates to yield various mellitate anions with pronounced tendencies to form complexes with cations including protonated amines. Deprotonation of MA at physiological pH produces anions with high charge densities (MA5- and MA6-) whose influence on co-dissolved proteins has not been thoroughly studied. As electrostatic attraction between highly symmetric MA6- anions and positively charged low-symmetry globular proteins could lead to interesting self-assembly patterns we have chosen hen egg white lysozyme (HEWL), a basic stably folded globular protein as a cationic partner for mellitate anions to form such hypothetical nanostructures. Indeed, mixing of neutral HEWL and MA solutions does result in precipitation of electrostatic complexes with the stoichiometry dependent on pH. We have studied the self-assembly of HEWL-MA structures using vibrational spectroscopy (infrared absorption and Raman scattering), circular dichroism (CD), atomic force microscopy (AFM). Possible HEWL-MA6- molecular docking scenarios were analyzed using computational tools. Our results indicate that even at equimolar ratios (in respect to HEWL), MA5- and MA6- anions are capable of inducing misfolding and aggregation of the protein upon mild heating which results in non-native intermolecular beta-sheet appearing in the amide I’ region of the corresponding infrared spectra. The association process leads to aggregates with compacted morphologies entrapping mellitate anions. The capacity of extremely diluted mellitate anions (i.e. at sub-millimolar concentration range) to trigger aggregation of proteins is discussed in the context of mechanisms of misfolding.
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Affiliation(s)
- Grzegorz Ścibisz
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Robert Dec
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
| | - Wojciech Dzwolak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw, Poland
- * E-mail:
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