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Markus LMD, Sharon I, Munro K, Grogg M, Hilvert D, Strauss M, Schmeing TM. Structure and function of a hexameric cyanophycin synthetase 2. Protein Sci 2023:e4685. [PMID: 37222490 DOI: 10.1002/pro.4685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 04/20/2023] [Accepted: 05/22/2023] [Indexed: 05/25/2023]
Abstract
Cyanophycin is a natural polymer composed of a poly-aspartate backbone with arginine attached to each of the aspartate sidechains. Produced by a wide range of bacteria, which mainly use it as a store of fixed nitrogen, it has many promising industrial applications. Cyanophycin can be synthesized from the amino acids Asp and Arg by the widespread cyanophycin synthetase 1 (CphA1), or from the dipeptide β-Asp-Arg by the cyanobacterial enzyme cyanophycin synthetase 2 (CphA2). CphA2 enzymes display a range of oligomeric states, from dimers to dodecamers. Recently, the crystal structure of a CphA2 dimer was solved but could not be obtained in complex with substrate. Here, we report cryo-EM structures of the hexameric CphA2 from Stanieria sp. at ~2.8 Å resolution, both with and without ATP analog and cyanophycin. The structures show a two-fold symmetrical, trimer-of-dimers hexameric architecture, and substrate-binding interactions that are similar to those of CphA1. Mutagenesis experiments demonstrate the importance of several conserved substrate-binding residues. We also find that a Q416A/R528G double mutation prevents hexamer formation and use this double mutant to show that hexamerization augments the rate of cyanophycin synthesis. Together, these results increase our mechanistic understanding of how an interesting green polymer is biosynthesized. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Linda M D Markus
- Department of Biochemistry Montréal, QC, Canada
- Centre de recherche en biologie structurale Montréal, QC, Canada
| | - Itai Sharon
- Department of Biochemistry Montréal, QC, Canada
- Centre de recherche en biologie structurale Montréal, QC, Canada
| | - Kim Munro
- Centre de recherche en biologie structurale Montréal, QC, Canada
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zürich, Zürich, Switzerland
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zürich, Zürich, Switzerland
| | - Mike Strauss
- Department of Biochemistry Montréal, QC, Canada
- Department of Anatomy and Cell Biology McGill University Montréal, QC, Canada
| | - T Martin Schmeing
- Department of Biochemistry Montréal, QC, Canada
- Centre de recherche en biologie structurale Montréal, QC, Canada
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2
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Sharon I, Grogg M, Hilvert D, Schmeing TM. The structure of cyanophycinase in complex with a cyanophycin degradation intermediate. Biochim Biophys Acta Gen Subj 2022; 1866:130217. [PMID: 35905922 DOI: 10.1016/j.bbagen.2022.130217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/07/2022] [Accepted: 07/22/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Cyanophycinases are serine protease family enzymes which are required for the metabolism of cyanophycin, the natural polymer multi-L-arginyl-poly(L-aspartic acid). Cyanophycinases degrade cyanophycin to β-Asp-Arg dipeptides, which enables use of this important store of fixed nitrogen. METHODS We used genetic code expansion to incorporate diaminopropionic acid into cyanophycinase in place of the active site serine, and determined a high-resolution structure of the covalent acyl-enzyme intermediate resulting from attack of cyanophycinase on a short cyanophycin segment. RESULTS The structure indicates that cyanophycin dipeptide residues P1 and P1' bind shallow pockets adjacent to the catalytic residues. We observe many cyanophycinase - P1 dipeptide interactions in the co-complex structure. Calorimetry measurements show that at least two cyanophycin dipeptides are needed for high affinity binding to cyanophycinase. We also characterized a putative cyanophycinase which we found to be structurally very similar but that shows no activity and could not be activated by mutation of its active site. GENERAL SIGNIFICANCE Despite its peptidic structure, cyanophycin is resistant to degradation by peptidases and other proteases. Our results help show how cyanophycinase can specifically bind and degrade this important polymer.
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Affiliation(s)
- Itai Sharon
- Department of Biochemistry and Centre de recherche en biologie structurale, McGill University, Montréal, QC H3G 0B1, Canada
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - T Martin Schmeing
- Department of Biochemistry and Centre de recherche en biologie structurale, McGill University, Montréal, QC H3G 0B1, Canada.
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3
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Abstract
Cyanophycin is a biopolymer composed of long chains of β-Asp-Arg. It is widespread in nature, being synthesized by many clades of bacteria, which use it as a cellular reservoir of nitrogen, carbon, and energy. Two enzymes are known to produce cyanophycin: cyanophycin synthetase 1 (CphA1), which builds cyanophycin from the amino acids Asp and Arg by alternating between two separate reactions for backbone extension and side chain modification, and cyanophycin synthetase 2 (CphA2), which polymerizes β-Asp-Arg dipeptides. CphA2 is evolutionarily related to CphA1, but questions about CphA2's altered structure and function remain unresolved. Cyanophycin and related molecules have drawn interest as green biopolymers. Because it only has a single active site, CphA2 could be more useful than CphA1 for biotechnological applications seeking to produce modified cyanophycin. In this study, we report biochemical assays on nine cyanobacterial CphA2 enzymes and report the crystal structure of CphA2 from Gloeothece citriformis at 3.0 Å resolution. The structure reveals a homodimeric, three-domain architecture. One domain harbors the polymerization active site and the two other domains have structural roles. The structure and biochemical assays explain how CphA2 binds and polymerizes β-Asp-Arg and highlights differences in in vitro oligomerization and activity between CphA2 enzymes. Using the structure and distinct activity profile as a guide, we introduced a single point mutation that converted Gloeothece citriformis CphA2 from a primer-dependent enzyme into a primer-independent enzyme.
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Affiliation(s)
- Itai Sharon
- Department of Biochemistry and Centre de recherche en biologie structurale, McGill University, Montréal H3G 0B1, Quebec, Canada
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - T. Martin Schmeing
- Department of Biochemistry and Centre de recherche en biologie structurale, McGill University, Montréal H3G 0B1, Quebec, Canada
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Lau Y, Oamen HP, Grogg M, Parfenova I, Saarikangas J, Hannay R, Nichols RA, Hilvert D, Barral Y, Caudron F. Whi3 mnemon association with endoplasmic reticulum membranes confines the memory of deceptive courtship to the yeast mother cell. Curr Biol 2022; 32:963-974.e7. [PMID: 35085498 PMCID: PMC8938615 DOI: 10.1016/j.cub.2022.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/19/2021] [Accepted: 01/04/2022] [Indexed: 12/17/2022]
Abstract
Prion-like proteins are involved in many aspects of cellular physiology, including cellular memory. In response to deceptive courtship, budding yeast escapes pheromone-induced cell-cycle arrest through the coalescence of the G1/S inhibitor Whi3 into a dominant, inactive super-assembly. Whi3 is a mnemon (Whi3mnem), a protein that conformational change maintains as a trait in the mother cell but is not inherited by the daughter cells. How the maintenance and asymmetric inheritance of Whi3mnem are achieved is unknown. Here, we report that Whi3mnem is closely associated with endoplasmic reticulum (ER) membranes and is retained in the mother cell by the lateral diffusion barriers present at the bud neck. Strikingly, barrier defects made Whi3mnem propagate in a mitotically stable, prion-like manner. The amyloid-forming glutamine-rich domain of Whi3 was required for both mnemon and prion-like behaviors. Thus, we propose that Whi3mnem is in a self-templating state, lending temporal maintenance of memory, whereas its association with the compartmentalized membranes of the ER prevents infectious propagation to the daughter cells. These results suggest that confined self-templating super-assembly is a powerful mechanism for the long-term encoding of information in a spatially defined manner. Yeast courtship may provide insights on how individual synapses become potentiated in neuronal memory.
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Affiliation(s)
- Yasmin Lau
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Henry Patrick Oamen
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 8093 Zürich, Switzerland
| | - Iuliia Parfenova
- Institute of Biochemistry, ETH Zürich, Otto-Stern-Weg, 8093 Zürich, Switzerland
| | - Juha Saarikangas
- Helsinki Institute of Life Science HiLIFE, Viikinkaari 5, 00790 Helsinki, Finland; Faculty of Biological and Environmental Sciences, Viikinkaari 5, 00790 Helsinki, Finland; Neuroscience Center, University of Helsinki, Viikinkaari 5, 00790 Helsinki, Finland
| | - Robin Hannay
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Richard Alan Nichols
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zürich, Vladimir-Prelog-Weg, 8093 Zürich, Switzerland
| | - Yves Barral
- Institute of Biochemistry, ETH Zürich, Otto-Stern-Weg, 8093 Zürich, Switzerland
| | - Fabrice Caudron
- School of Biological and Behavioural Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK; IGMM, Univ Montpellier, CNRS, Route de Mende, 34293 Montpellier, France.
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Sharon I, Haque AS, Grogg M, Lahiri I, Seebach D, Leschziner AE, Hilvert D, Schmeing TM. Structures and function of the amino acid polymerase cyanophycin synthetase. Nat Chem Biol 2021; 17:1101-1110. [PMID: 34385683 DOI: 10.1038/s41589-021-00854-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 07/08/2021] [Indexed: 12/13/2022]
Abstract
Cyanophycin is a natural biopolymer produced by a wide range of bacteria, consisting of a chain of poly-L-Asp residues with L-Arg residues attached to the β-carboxylate sidechains by isopeptide bonds. Cyanophycin is synthesized from ATP, aspartic acid and arginine by a homooligomeric enzyme called cyanophycin synthetase (CphA1). CphA1 has domains that are homologous to glutathione synthetases and muramyl ligases, but no other structural information has been available. Here, we present cryo-electron microscopy and X-ray crystallography structures of cyanophycin synthetases from three different bacteria, including cocomplex structures of CphA1 with ATP and cyanophycin polymer analogs at 2.6 Å resolution. These structures reveal two distinct tetrameric architectures, show the configuration of active sites and polymer-binding regions, indicate dynamic conformational changes and afford insight into catalytic mechanism. Accompanying biochemical interrogation of substrate binding sites, catalytic centers and oligomerization interfaces combine with the structures to provide a holistic understanding of cyanophycin biosynthesis.
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Affiliation(s)
- Itai Sharon
- Department of Biochemistry and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Quebec, Canada
| | - Asfarul S Haque
- Department of Biochemistry and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Quebec, Canada
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zürich, Zürich, Switzerland
| | - Indrajit Lahiri
- Department of Cellular and Molecular Medicine, and Section of Molecular Biology, Division of Biological Sciences, University of California San Diego (UCSD), La Jolla, CA, USA
| | - Dieter Seebach
- Laboratory of Organic Chemistry, ETH Zürich, Zürich, Switzerland
| | - Andres E Leschziner
- Department of Cellular and Molecular Medicine, and Section of Molecular Biology, Division of Biological Sciences, University of California San Diego (UCSD), La Jolla, CA, USA
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zürich, Zürich, Switzerland
| | - T Martin Schmeing
- Department of Biochemistry and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Quebec, Canada.
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Grogg M, Hilvert D, Beck A, Seebach D. Syntheses of Cyanophycin Segments for Investigations of Cell-Penetration. SYNTHESIS-STUTTGART 2019. [DOI: 10.1055/s-0037-1610202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Novel guanidinium-rich oligopeptide derivatives R-[Adp(X)]8-NH2 are described, which consist of an octa-aspartic acid backbone with argininylated side chains that are derived from the biopolymer cyanophycin [H-(Adp)n-OH]. The Fmoc-Adp(X,Pbf)-OH building blocks for solid-state peptide synthesis (SSPS) of Adp octamers were prepared from Fmoc-Arg(Pbf)-OH and Fmoc-Asp-OAll. Coupling on PAL resin provided four octamers with and without N-terminal fluorescent groups (FAM) and C-terminal amide groups. Milligram quantities of Adp-octamers were isolated after preparative HPLC purification. The structure of the novel guanidinium-rich oligomers is unique insofar as the side chains of the Asp8-backbone include both a guanidino and a carboxylic acid group, the influence of which will be tested with the corresponding ester and amide derivatives that were synthesized in parallel. Unusual cell-penetrating properties of the Adp-octamers are expected.
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Affiliation(s)
- Marcel Grogg
- Laboratorium für Organische Chemie (LOC), Departement Chemie und Angewandte, Biowissenschaften (D-CHAB), ETH-Zürich
| | - Donald Hilvert
- Laboratorium für Organische Chemie (LOC), Departement Chemie und Angewandte, Biowissenschaften (D-CHAB), ETH-Zürich
| | - Albert Beck
- Laboratorium für Organische Chemie (LOC), Departement Chemie und Angewandte, Biowissenschaften (D-CHAB), ETH-Zürich
| | - Dieter Seebach
- Laboratorium für Organische Chemie (LOC), Departement Chemie und Angewandte, Biowissenschaften (D-CHAB), ETH-Zürich
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7
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Grogg M, Hilvert D, Ebert MO, Beck AK, Seebach D, Kurth F, Dittrich PS, Sparr C, Wittlin S, Rottmann M, Mäser P. Cell Penetration, Herbicidal Activity, and in-vivo-Toxicity of Oligo-Arginine Derivatives and of Novel Guanidinium-Rich Compounds Derived from the Biopolymer Cyanophycin. Helv Chim Acta 2018; 101. [PMID: 30905972 DOI: 10.1002/hlca.201800112] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Oligo-arginines are thoroughly studied cell-penetrating peptides (CPPs, Figures 1 and 2). Previous in-vitro investigations with the octaarginine salt of the phosphonate fosmidomycin (herbicide and anti-malaria drug) have shown a 40-fold parasitaemia inhibition with P. falciparum, compared to fosmidomycin alone (Figure 3). We have now tested this salt, as well as the corresponding phosphinate salt of the herbicide glufosinate, for herbicidal activity with whole plants by spray application, hoping for increased activities, i.e. decreased doses. However, both salts showed low herbicidal activity, indicating poor foliar uptake (Table 1). Another pronounced difference between in-vitro and in-vivo activity was demonstrated with various cell-penetrating octaarginine salts of fosmidomycin: intravenous injection to mice caused exitus of the animals within minutes, even at doses as low as 1.4 μmol/kg (Table 2). The results show that use of CPPs for drug delivery, for instance to cancer cells and tissues, must be considered with due care. The biopolymer cyanophycin is a poly-aspartic acid containing argininylated side chains (Figure 4); its building block is the dipeptide H-βAsp-αArg-OH (H-Adp-OH). To test and compare the biological properties with those of octaarginines we synthesized Adp8-derivatives (Figure 5). Intravenouse injection of H-Adp8-NH2 into the tail vein of mice with doses as high as 45 μmol/kg causes no symptoms whatsoever (Table 3), but H-Adp8-NH2 is not cell penetrating (HEK293 and MCF-7 cells, Figure 6). On the other hand, the fluorescently labeled octamers FAM-(Adp(OMe))8-NH2 and FAM-(Adp(NMe2))8-NH2 with ester and amide groups in the side chains exhibit mediocre to high cell-wall permeability (Figure 6), and are toxic (Table 3). Possible reasons for this behavior are discussed (Figure 7) and corresponding NMR spectra are presented (Figure 8).
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Affiliation(s)
- Marcel Grogg
- Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, ETH-Zürich, Hönggerberg HCI, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Donald Hilvert
- Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, ETH-Zürich, Hönggerberg HCI, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Marc-Olivier Ebert
- Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, ETH-Zürich, Hönggerberg HCI, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Albert K Beck
- Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, ETH-Zürich, Hönggerberg HCI, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Dieter Seebach
- Laboratorium für Organische Chemie, Departement Chemie und Angewandte Biowissenschaften, ETH-Zürich, Hönggerberg HCI, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Felix Kurth
- Department of Biosystems Science and Engineering, ETH Zürich, BSD H 368, Mattenstrasse 26, CH-4058 Basel, Switzerland
| | - Petra S Dittrich
- Department of Biosystems Science and Engineering, ETH Zürich, BSD H 368, Mattenstrasse 26, CH-4058 Basel, Switzerland
| | - Christof Sparr
- Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel, Switzerland
| | - Sergio Wittlin
- Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4051 Basel, Switzerland
| | - Matthias Rottmann
- Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4051 Basel, Switzerland
| | - Pascal Mäser
- Swiss Tropical and Public Health Institute, Socinstrasse 57, CH-4051 Basel, Switzerland
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8
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Dragoman RM, Grogg M, Bodnarchuk MI, Tiefenboeck P, Hilvert D, Dirin DN, Kovalenko MV. Surface-Engineered Cationic Nanocrystals Stable in Biological Buffers and High Ionic Strength Solutions. Chem Mater 2017; 29:9416-9428. [PMID: 29606797 PMCID: PMC5871342 DOI: 10.1021/acs.chemmater.7b03504] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 10/13/2017] [Indexed: 05/27/2023]
Abstract
Progress in colloidal synthesis in the last two decades has enabled high-quality semiconductor, plasmonic, and magnetic nanocrystals (NCs). As synthesized, these NCs are usually capped with long-chain apolar ligands. Postsynthetic surface functionalization is required for rendering such NCs colloidally stable in polar media such as water. However, unlike small anionic molecules and polymeric coatings, producing positively charged stable NCs, especially at high ionic strengths, has remained challenging. Here, we present a general approach to achieve aqueously stable cationic NCs using a set of small (<2.5 nm long) positively charged ligands. The applicability of this method is demonstrated for a variety of materials including semiconductor CdSe/CdS core/shell NCs, magnetic Fe@Fe3O4, Fe3O4, and FePt NCs, and three different classes of plasmonic Au NCs including large nanorods. The obtained cationic NCs typically have zeta potential values ranging from +30 to +60 mV and retain colloidal stability for days to months, depending on NC/ligand pair, in several biological buffers at elevated pH and in concentrated salt solutions. This allowed us to demonstrate site-specific staining of cellular structures using fluorescent cationic NCs with several different surface chemistries. Furthermore, colloidal stability of the obtained NCs in the presence of other charged species allowed the assembly of cationic and anionic counterparts driven primarily by electrostatic attraction. With this approach, we prepare highly uniform 3D and 2D binary mixtures of NCs through induced homogeneous aggregation and alternating-charge layer-by-layer deposition, respectively. Such binary mixtures may provide a new route in the engineering of nanocrystalline solids for electronics, thermoelectrics, and photovoltaics.
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Affiliation(s)
- Ryan M. Dragoman
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Marcel Grogg
- Laboratory
of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Maryna I. Bodnarchuk
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa-Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Peter Tiefenboeck
- Institute
of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Donald Hilvert
- Laboratory
of Organic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Dmitry N. Dirin
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
| | - Maksym V. Kovalenko
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zürich, Switzerland
- Laboratory
for Thin Films and Photovoltaics, Empa-Swiss
Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
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Ruiz J, Boehringer R, Grogg M, Raya J, Schirer A, Crucifix C, Hellwig P, Schultz P, Torbeev V. Covalent Tethering and Residues with Bulky Hydrophobic Side Chains Enable Self-Assembly of Distinct Amyloid Structures. Chembiochem 2016; 17:2274-2285. [PMID: 27717158 DOI: 10.1002/cbic.201600440] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Indexed: 11/10/2022]
Abstract
Polymorphism is a common property of amyloid fibers that complicates their detailed structural and functional studies. Here we report experiments illustrating the chemical principles that enable the formation of amyloid polymorphs with distinct stoichiometric composition. Using appropriate covalent tethering we programmed self-assembly of a model peptide corresponding to the [20-41] fragment of human β2-microglobulin into fibers with either trimeric or dimeric amyloid cores. Using a set of biophysical and biochemical methods we demonstrated their distinct structural, morphological, and templating properties. Furthermore, we showed that supramolecular approaches in which the peptide is modified with bulky substituents can also be applied to modulate the formation of different fiber polymorphs. Such strategies, when applied to disease-related peptides and proteins, will greatly help in the evaluation of the biological properties of structurally distinct amyloids.
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Affiliation(s)
- Jérémy Ruiz
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-, UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| | - Régis Boehringer
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-, UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| | - Marcel Grogg
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-, UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
| | - Jésus Raya
- Membrane Biophysics and NMR, Institute of Chemistry, University of Strasbourg, CNRS-, UMR 7177, 4 rue Blaise Pascal, 67008, Strasbourg, France
| | - Alicia Schirer
- Laboratory of Bioelectrochemistry and Spectroscopy, University of Strasbourg, CNRS-, UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Corinne Crucifix
- Department of Integrated Structural Biology, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), INSERM-U964, University of Strasbourg, CNRS-, UMR 7104, 1 rue Laurent Fries, 67404, Illkirch, France
| | - Petra Hellwig
- Laboratory of Bioelectrochemistry and Spectroscopy, University of Strasbourg, CNRS-, UMR 7140, 1 rue Blaise Pascal, 67070, Strasbourg, France
| | - Patrick Schultz
- Department of Integrated Structural Biology, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), INSERM-U964, University of Strasbourg, CNRS-, UMR 7104, 1 rue Laurent Fries, 67404, Illkirch, France
| | - Vladimir Torbeev
- ISIS (Institut de Science et d'Ingénierie Supramoléculaires) and, icFRC (International Center for Frontier Research in Chemistry), University of Strasbourg, CNRS-, UMR 7006, 8 allée Gaspard Monge, 67083, Strasbourg, France
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10
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Torbeev V, Grogg M, Ruiz J, Boehringer R, Schirer A, Hellwig P, Jeschke G, Hilvert D. Chiral recognition in amyloid fiber growth. J Pept Sci 2016; 22:290-304. [DOI: 10.1002/psc.2861] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/05/2016] [Accepted: 01/11/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Vladimir Torbeev
- Institut de Science et d'Ingénierie Supramoléculaires; International Center for Frontier Research in Chemistry, UMR 7006, Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Marcel Grogg
- Laboratory of Organic Chemistry, ETH Zurich; Vladimir-Prelog-Weg 1-5/10; Zürich CH-8093 Switzerland
| | - Jérémy Ruiz
- Institut de Science et d'Ingénierie Supramoléculaires; International Center for Frontier Research in Chemistry, UMR 7006, Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Régis Boehringer
- Institut de Science et d'Ingénierie Supramoléculaires; International Center for Frontier Research in Chemistry, UMR 7006, Université de Strasbourg; 8 allée Gaspard Monge 67000 Strasbourg France
| | - Alicia Schirer
- Laboratoire de Bioélectrochimie et Spectroscopie; Chimie de la Matière Complexe, UMR 7140, Université de Strasbourg-CNRS; 1 rue Blaise Pascal 67070 Strasbourg France
| | - Petra Hellwig
- Laboratoire de Bioélectrochimie et Spectroscopie; Chimie de la Matière Complexe, UMR 7140, Université de Strasbourg-CNRS; 1 rue Blaise Pascal 67070 Strasbourg France
| | - Gunnar Jeschke
- Laboratory of Physical Chemistry; ETH Zurich, Vladimir-Prelog-Weg 1-5/10; Zürich CH-8093 Switzerland
| | - Donald Hilvert
- Laboratory of Organic Chemistry, ETH Zurich; Vladimir-Prelog-Weg 1-5/10; Zürich CH-8093 Switzerland
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