1
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Park HS, Kang YK. Exploring Helical Folding in Oligomers of Cyclopentane-Based ϵ-Amino Acids: A Computational Study. Chemistry 2022; 11:e202100253. [PMID: 35083888 PMCID: PMC8886640 DOI: 10.1002/open.202100253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/21/2021] [Indexed: 11/28/2022]
Abstract
The conformational preferences of oligopeptides of an ϵ‐amino acid (2‐((1R,3S)‐3‐(aminomethyl)cyclopentyl)acetic acid, Amc5a) with a cyclopentane substituent in the Cβ−Cγ−Cδ sequence of the backbone were investigated using DFT methods in chloroform and water. The most preferred conformation of Amc5a oligomers (dimer to hexamer) was the H16 helical structure both in chloroform and water. Four residues were found to be sufficient to induce a substantial H16 helix population in solution. The Amc5a hexamer adopted a stable left‐handed (M)‐2.316 helical conformation with a rise of 4.8 Å per turn. The hexamer of Ampa (an analogue of Amc5a with replacing cyclopentane by pyrrolidine) adopted the right‐handed mixed (P)‐2.918/16 helical conformation in chloroform and the (M)‐2.416 helical conformation in water. Therefore, hexamers of ϵ‐amino acid residues exhibited different preferences of helical structures depending on the substituents in peptide backbone and the solvent polarity as well as the chain length.
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Affiliation(s)
- Hae Sook Park
- Department of Nursing, Cheju Halla University, Cheju, 63092, Republic of Korea
| | - Young Kee Kang
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
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2
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Krupová M, Kessler J, Bouř P. Polymorphism of Amyloid Fibrils Induced by Catalytic Seeding: A Vibrational Circular Dichroism Study. Chemphyschem 2020; 22:83-91. [DOI: 10.1002/cphc.202000797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 10/16/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Monika Krupová
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
- Faculty of Mathematics and Physics Charles University Ke Karlovu 3 12116 Prague 2 Czech Republic
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
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3
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Dec R, Guza M, Dzwolak W. Reduction of a disulfide-constrained oligo-glutamate peptide triggers self-assembly of β 2-type amyloid fibrils with the chiroptical properties determined by supramolecular chirality. Int J Biol Macromol 2020; 162:866-872. [PMID: 32593758 DOI: 10.1016/j.ijbiomac.2020.06.221] [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: 03/29/2020] [Revised: 06/15/2020] [Accepted: 06/23/2020] [Indexed: 11/27/2022]
Abstract
Disulfide bonds prevent aggregation of globular proteins by stabilizing the native state. However, a disulfide bond within a disordered state may accelerate amyloidogenic nucleation by navigating fluctuating polypeptide chains towards an orderly assembly of β-sheets. Here, the self-assembly behavior of Glu-Cys-(Glu)4-Cys-Glu peptide (E6C2), in which an intrachain disulfide bond is engineered into an amyloidogenic homopolypeptide motif, is investigated. To this end, the Thioflavin T (ThT) fluorescence kinetic assay is combined with infrared spectroscopy, circular dichroism (CD), atomic force microscopy (AFM) and Raman scattering measurements. Regardless of whether the disulfide bond is intact or reduced, E6C2 monomers remain disordered within a broad range of pH. On the other hand, only reduced E6C2 self-assembles into amyloid fibrils with the unique infrared traits indicative of three-center hydrogen bonds involving main-chain carbonyl as a bifurcating acceptor and main-chain NH and side-chain -COOH groups as hydrogen donors: the bonding pattern observed in so-called β2-fibrils. AFM analysis of β2-E6C2 reveals tightly packed rectangular superstructures whose presence coincides with strong chiroptical properties. Our findings suggest that formation of chiral amyloid superstructures may be a generic process accessible to various substrates, and that the fully extended conformation of a poly-Glu chain is a condition sine qua non for self-assembly of β2-fibrils.
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Affiliation(s)
- Robert Dec
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., 02-093 Warsaw, Poland
| | - Marcin Guza
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., 02-093 Warsaw, Poland
| | - Wojciech Dzwolak
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, 1 Pasteur Str., 02-093 Warsaw, Poland.
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4
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Krupová M, Kessler J, Bouř P. Recent Trends in Chiroptical Spectroscopy: Theory and Applications of Vibrational Circular Dichroism and Raman Optical Activity. Chempluschem 2020; 85:561-575. [DOI: 10.1002/cplu.202000014] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/18/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Monika Krupová
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
- Faculty of Mathematics and PhysicsCharles University Ke Karlovu 3 12116 Prague 2 Czech Republic
| | - Jiří Kessler
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
| | - Petr Bouř
- Institute of Organic Chemistry and Biochemistry Academy of Sciences Flemingovo náměstí 2 16610 Prague Czech Republic
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5
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Machado CA, Smith IR, Savin DA. Self-Assembly of Oligo- and Polypeptide-Based Amphiphiles: Recent Advances and Future Possibilities. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02043] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Craig A. Machado
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Ian R. Smith
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Daniel A. Savin
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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6
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Truzzolillo D, Sennato S, Sarti S, Casciardi S, Bazzoni C, Bordi F. Overcharging and reentrant condensation of thermoresponsive ionic microgels. SOFT MATTER 2018; 14:4110-4125. [PMID: 29664092 PMCID: PMC5968447 DOI: 10.1039/c7sm02357j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
We investigated the complexation of thermoresponsive anionic poly(N-isopropylacrylamide) (PNiPAM) microgels and cationic ε-polylysine (ε-PLL) chains. By combining electrophoresis, light scattering, transmission electron microscopy (TEM) and dielectric spectroscopy (DS) we studied the adsorption of ε-PLL onto microgel networks and its effect on the stability of suspensions. We show that the volume phase transition (VPT) of microgels triggers a large polyion adsorption. Two interesting phenomena with unique features occur: a temperature-dependent microgel overcharging and a complex reentrant condensation. The latter may occur at fixed polyion concentration, when temperature is raised above the VPT of microgels, or by increasing the number density of polycations at fixed temperature. TEM and DS measurements unambiguously show that short PLL chains adsorb onto microgels and act as electrostatic glue above the VPT. By performing thermal cycles, we further show that polyion-induced clustering is a quasi-reversible process: within the time of our experiments large clusters form above the VPT and partially re-dissolve as the mixtures are cooled down. Finally we give a proof that the observed phenomenology is purely electrostatic in nature: an increase of the ionic strength gives rise to polyion desorption from the microgel outer shell.
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Affiliation(s)
- Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier , 4 F-34095 Montpellier , France .
| | - Simona Sennato
- CNR-ISC UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma , P.le A. Moro 2 , 00185 Roma , Italy
| | - Stefano Sarti
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
| | - Stefano Casciardi
- National Institute for Insurance against Accidents at Work (INAIL Research), Department of Occupational and Environmental Medicine, Epidemiology and Hygiene , Roma , Italy
| | - Chiara Bazzoni
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
| | - Federico Bordi
- CNR-ISC UOS Roma, c/o Dipartimento di Fisica, Sapienza Università di Roma , P.le A. Moro 2 , 00185 Roma , Italy
- Dipartimento di Fisica, Sapienza Università di Roma , P.zzle A. Moro 2 , 00185 Roma , Italy .
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7
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Song Z, Fu H, Wang R, Pacheco LA, Wang X, Lin Y, Cheng J. Secondary structures in synthetic polypeptides from N-carboxyanhydrides: design, modulation, association, and material applications. Chem Soc Rev 2018; 47:7401-7425. [DOI: 10.1039/c8cs00095f] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
This article highlights the conformation-specific properties and functions of synthetic polypeptides derived from N-carboxyanhydrides.
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Affiliation(s)
- Ziyuan Song
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Hailin Fu
- Department of Chemistry and Polymer Program at the Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| | - Ruibo Wang
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Lazaro A. Pacheco
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Xu Wang
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
| | - Yao Lin
- Department of Chemistry and Polymer Program at the Institute of Materials Science
- University of Connecticut
- Storrs
- USA
| | - Jianjun Cheng
- Department of Materials Science and Engineering
- University of Illinois at Urbana-Champaign
- Urbana
- USA
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8
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The PPII-to-α-helix transition of poly- l -lysine in methanol/water solvent mixtures accompanied by fibrillar self-aggregation: An influence of fluphenazine molecules. Biophys Chem 2017; 227:14-20. [DOI: 10.1016/j.bpc.2017.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/19/2022]
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9
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Cieślik-Boczula K. Alpha-helix to beta-sheet transition in long-chain poly-l-lysine: Formation of alpha-helical fibrils by poly-l-lysine. Biochimie 2017; 137:106-114. [PMID: 28315381 DOI: 10.1016/j.biochi.2017.03.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/12/2017] [Indexed: 01/06/2023]
Abstract
The temperature-induced α-helix to β-sheet transition in long-chain poly-l-lysine (PLL), accompanied by the gauche-to-trans isomerization of CH2 groups in the hydrocarbon side chains of Lys amino acid residues, and formation of β-sheet as well as α-helix fibrillar aggregates of PLL have been studied using Fourier-transform infrared (FT-IR) and vibrational circular dichroism (VCD) spectroscopy, and transmission electron microscopy (TEM). In a low-temperature alkaline water solution or in a methanol-rich water mixture, the secondary structure of PLL is represented by α-helical conformations with unordered and gauche-rich hydrocarbon side chains. Under these conditions, PLL molecules aggregate into α-helical fibrils. PLLs dominated by extended antiparallel β-sheet structures with highly ordered trans-rich hydrocarbon side chains are formed in a high-temperature range at alkaline pD and aggregate into fibrillar, protofibrillar, and spherical forms. Presented data support the idea that fibrillar aggregation is a varied phenomenon possible in repetitive structural elements with not only a β-sheet-rich conformation, but also an α-helical-rich conformation.
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10
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Hernik-Magoń A, Puławski W, Fedorczyk B, Tymecka D, Misicka A, Szymczak P, Dzwolak W. Beware of Cocktails: Chain-Length Bidispersity Triggers Explosive Self-Assembly of Poly-L-Glutamic Acid β2-Fibrils. Biomacromolecules 2016; 17:1376-82. [PMID: 26909651 DOI: 10.1021/acs.biomac.5b01770] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Chain-length polydispersity is among the least understood factors governing the fibrillation propensity of homopolypeptides. For monodisperse poly-L-glutamic acid (PLGA), the tendency to form fibrils depends of the main-chain length. Long-chained PLGA, so-called (Glu)200, fibrillates more readily than short (Glu)5 fragments. Here we show that conversion of α-helical (Glu)200 into amyloid-like β-fibrils is dramatically accelerated in the presence of intrinsically disordered (Glu)5. While separately self-assembled fibrils of (Glu)200 and (Glu)5 reveal distinct morphological and infrared characteristics, accelerated fibrillation in mixed (Glu)200 and (Glu)5 leads to aggregates similar to neat (Glu)200 fibrils, even in excess of (Glu)5. According to molecular dynamics simulations and circular dichroism measurements, local events of "misfolding transfer" from (Glu)5 to (Glu)200 may play a key role in the initial stages of conformational dynamics underlying the observed phenomenon. Our results highlight chain-length polydispersity as a potent, although so-far unrecognized factor profoundly affecting the fibrillation propensity of homopolypeptides.
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Affiliation(s)
- Agnieszka Hernik-Magoń
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Wojciech Puławski
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Bartłomiej Fedorczyk
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Dagmara Tymecka
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Aleksandra Misicka
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Piotr Szymczak
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
| | - Wojciech Dzwolak
- Department of Chemistry, Biological and Chemical Research Centre, and ‡Institute of Theoretical Physics, Faculty of Physics, University of Warsaw , Warsaw, Poland
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11
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Tao Y, Chen X, Jia F, Wang S, Xiao C, Cui F, Li Y, Bian Z, Chen X, Wang X. New chemosynthetic route to linear ε-poly-lysine. Chem Sci 2015; 6:6385-6391. [PMID: 30090258 PMCID: PMC6054053 DOI: 10.1039/c5sc02479j] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 07/28/2015] [Indexed: 12/22/2022] Open
Abstract
ε-Poly-lysine (ε-PL) is an uncommon cationic, naturally-occurring homopolymer produced by the fermentation process. Due to its significant antimicrobial activity and nontoxicity to humans, ε-PL is now industrially produced as an additive, e.g. for food and cosmetics. However, the biosynthetic route can only make polymers with a molecular weight of about 3 kDa. Here, we report a new chemical strategy based on ring-opening polymerization (ROP) to obtain ε-PL from lysine. The 2,5-dimethylpyrrole protected α-amino-ε-caprolactam monomer was prepared through cyclization of lysine followed by protection. ROP of this monomer, followed by the removal of the protecting group, 2,5-dimethylpyrrole, ultimately yielded ε-PL with varying molecular weights. The structure of this chemosynthetic ε-PL has been fully characterized by 1H NMR, 13C NMR, and MALDI-TOF MS analyses. This chemosynthetic ε-PL exhibited a similar pKa value and low cytotoxicity as the biosynthetic analogue. Using this new chemical strategy involving ROP without the need for phosgene may enable a more cost effective production of ε-PL on a larger-scale, facilitating the design of more advanced biomaterials.
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Affiliation(s)
- Youhua Tao
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Xiaoyu Chen
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Fan Jia
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Shixue Wang
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Chunsheng Xiao
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Fengchao Cui
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Yunqi Li
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Zheng Bian
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
| | - Xianhong Wang
- Key Laboratory of Polymer Ecomaterials , Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , 130022 , People's Republic of China . ; ; http://www.youhuatao.weebly.com/
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12
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Hernik A, Puławski W, Fedorczyk B, Tymecka D, Misicka A, Filipek S, Dzwolak W. Amyloidogenic Properties of Short α-L-Glutamic Acid Oligomers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10500-10507. [PMID: 26362583 DOI: 10.1021/acs.langmuir.5b02915] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Poly-L-glutamic acid (PLGA) forms amyloid-like β2-fibrils with the main spectral component of vibrational amide I' band unusually shifted below 1600 cm(-1). This distinct infrared feature has been attributed to the presence of bifurcated hydrogen bonds coupling C═O and N-D (N-H) groups of the main chains to glutamate side chains. Here, we investigate how decreasing the chain length of PLGA affects its capacity to form β2-fibrils. A series of acidified aqueous solutions of synthetic (l-Glu)n peptides (n ≈ 200, 10, 6, 5, 4, and 3) were incubated at high temperature. We observed that n = 4 is the critical chain length for which formation of aggregates with the β2-like infrared features is still observed under such conditions. Interestingly, according to atomic force microscopy (AFM), the self-assembly of (L-Glu)n chains varying vastly in length produces fibrils with rather uniform diameters of approximately 4-6 nm. Kinetic experiments on (L-Glu)5 and (L-Glu)200 peptides indicate that the fibrillation is significantly accelerated not only in the presence of homologous seeds but also upon cross-seeding, suggesting thereby a common self-assembly theme for (L-Glu)n chains of various lengths. Our results are discussed in the context of mechanisms of amyloidogenic fibrillation of homopolypeptides.
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Affiliation(s)
- Agnieszka Hernik
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Wojciech Puławski
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Bartłomiej Fedorczyk
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Dagmara Tymecka
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Aleksandra Misicka
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Sławomir Filipek
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
| | - Wojciech Dzwolak
- Department of Chemistry, Biological and Chemical Research Centre, University of Warsaw , 00-927 Warsaw, Poland
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13
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Ageitos JM, Chuah JA, Numata K. Chemo-Enzymatic Synthesis of Linear and Branched Cationic Peptides: Evaluation as Gene Carriers. Macromol Biosci 2015; 15:990-1003. [PMID: 25828913 DOI: 10.1002/mabi.201400487] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 01/30/2015] [Indexed: 11/08/2022]
Abstract
Cationic peptides such as poly(l-lysine) and poly(l-arginine) are important tools for gene delivery since they can efficiently condense DNA. It is difficult to produce cationic peptides by recombinant bacterial expression, and its chemical synthesis requires several steps of protection/deprotection and toxic agents. Chemo-enzymatic synthesis of peptides is a clean chemistry technique that allows fast production under mild conditions. With the aim to simplify the production of cationic peptides, the present work develops an enzymatic reaction which enables the synthesis of linear cationic peptides and, through terminal functionalization with tris(2-aminoethyl)amine, of branched cationic peptide conjugates, which show improved DNA complex formation. Cytotoxicity and transfection efficiency of all the chemo-enzymatically synthesized cationic peptides are evaluated for their novel use as gene delivery agents. Synthesized peptides exhibit transfection efficiencies comparable to previously reported monodisperse peptides. Chemo-enzymatic synthesis opens the door for efficient production of cationic peptides for their use as gene delivery carriers.
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Affiliation(s)
- Jose Manuel Ageitos
- Enzyme Research Team, Biomass Engineering Program Cooperation Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Jo-Ann Chuah
- Enzyme Research Team, Biomass Engineering Program Cooperation Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Keiji Numata
- Enzyme Research Team, Biomass Engineering Program Cooperation Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
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14
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Anantharaj S, Jayakannan M. Amyloid-Like Hierarchical Helical Fibrils and Conformational Reversibility in Functional Polyesters Based on l-Amino Acids. Biomacromolecules 2015; 16:1009-20. [DOI: 10.1021/bm501903t] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Santhanaraj Anantharaj
- Department of Chemistry, Indian Institute of Science Education and Research (IISER)-Pune, Dr. Homi
Bhabha Road, Pune − 411008, Maharashtra, India
| | - Manickam Jayakannan
- Department of Chemistry, Indian Institute of Science Education and Research (IISER)-Pune, Dr. Homi
Bhabha Road, Pune − 411008, Maharashtra, India
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15
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Abstract
Poly(glutamic acid)–doxorubicin conjugates form fibrillar aggregates in the aqueous solution.
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Affiliation(s)
- Jingjing Lai
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
| | - Yanbin Huang
- Key Laboratory of Advanced Materials (MOE)
- Department of Chemical Engineering
- Tsinghua University
- Beijing 100084
- China
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16
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Lai J, Fu W, Zhu L, Guo R, Liang D, Li Z, Huang Y. Fibril aggregates formed by a glatiramer-mimicking random copolymer of amino acids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7221-7226. [PMID: 24882278 DOI: 10.1021/la501622t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Amyloid formation is now considered a universal and intrinsic property of all proteins, irrespective of their sequences. Therefore, it is interesting to see whether random copolymers of amino acids can also form amyloid aggregates. Here we use a copolymer of 4 amino acids, mimicking the clinically used drug Glatiramer, and demonstrate that it does form amyloid-like fibrils in the aqueous solution despite its random sequence structure. The fibrillar aggregates show an alanine-rich β-sheet secondary structure, proving the high tolerance of amyloid aggregates to the sequence irregularity in poly(amino acid)s, and suggesting the potential application of random copolymers as amyloid materials.
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Affiliation(s)
- Jingjing Lai
- Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University , Beijing 100084, China
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17
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Dzwolak W. Chirality and Chiroptical Properties of Amyloid Fibrils. Chirality 2014; 26:580-7. [DOI: 10.1002/chir.22335] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/28/2014] [Indexed: 01/23/2023]
Affiliation(s)
- Wojciech Dzwolak
- Biological and Chemical Research Centre, Department of Chemistry; University of Warsaw; Warsaw Poland
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