1
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Oktawiec J, Ebrahim OM, Chen Y, Su K, Sharpe C, Rosenmann ND, Barbut C, Weigand SJ, Thompson MP, Byrnes J, Qiao B, Gianneschi NC. Conformational modulation and polymerization-induced folding of proteomimetic peptide brush polymers. Chem Sci 2024:d4sc03420a. [PMID: 39129772 PMCID: PMC11308386 DOI: 10.1039/d4sc03420a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 07/16/2024] [Indexed: 08/13/2024] Open
Abstract
Peptide-brush polymers generated by graft-through living polymerization of peptide-modified monomers exhibit high proteolytic stability, therapeutic efficacy, and potential as functional tandem repeat protein mimetics. Prior work has focused on polymers generated from structurally disordered peptides that lack defined conformations. To obtain insight into how the structure of these polymers is influenced by the folding of their peptide sidechains, a set of polymers with varying degrees of polymerization was prepared from peptide monomers that adopt α-helical secondary structure for comparison to those having random coil structures. Circular dichroism and nuclear magnetic resonance spectroscopy confirm the maintenance of the secondary structure of the constituent peptide when polymerized. Small-angle X-ray scattering (SAXS) studies reveal the solution-phase conformation of PLPs in different solvent environments. In particular, X-ray scattering shows that modulation of solvent hydrophobicity, as well as hydrogen bonding patterns of the peptide sidechain, plays an important role in the degree of globularity and conformation of the overall polymer, with polymers of helical peptide brushes showing less spherical compaction in conditions where greater helicity is observed. These structural insights into peptide brush folding and polymer conformation inform the design of these proteomimetic materials with promise for controlling and predicting their artificial fold and morphology.
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Affiliation(s)
- Julia Oktawiec
- Department of Chemistry, Northwestern University Evanston IL 60208 USA
| | - Omar M Ebrahim
- Department of Chemistry, Northwestern University Evanston IL 60208 USA
| | - Yu Chen
- Department of Materials Science and Engineering, Northwestern University Evanston IL 60208 USA
| | - Kaylen Su
- Department of Natural Sciences, Baruch College, City University of New York New York NY 10010 USA
| | - Christopher Sharpe
- Department of Materials Science and Engineering, Northwestern University Evanston IL 60208 USA
| | - Nathan D Rosenmann
- Department of Materials Science and Engineering, Northwestern University Evanston IL 60208 USA
| | - Clara Barbut
- Department of Chemistry, Northwestern University Evanston IL 60208 USA
| | - Steven J Weigand
- DuPont-Northwestern-Dow Collaborative Access Team (DND-CAT) Synchrotron Research Center, Northwestern University Argonne IL 60208 USA
| | | | - James Byrnes
- Beamline 16ID, NSLS-II, Brookhaven National Laboratory Upton NY 11973 USA
| | - Baofu Qiao
- Department of Natural Sciences, Baruch College, City University of New York New York NY 10010 USA
| | - Nathan C Gianneschi
- Department of Chemistry, Northwestern University Evanston IL 60208 USA
- Department of Materials Science and Engineering, Northwestern University Evanston IL 60208 USA
- International Institute for Nanotechnology, Chemistry of Life Processes Institute, Simpson Querrey Institute, Lurie Cancer Center, Department of Biomedical Engineering, and Department of Pharmacology, Northwestern University Evanston IL 60208 USA
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2
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Zhao W, Gao M, Kong L, Yu S, Zhao C, Chen C. Chirality-Regulated Clusteroluminescence in Polypeptides. Biomacromolecules 2024; 25:1897-1905. [PMID: 38330502 DOI: 10.1021/acs.biomac.3c01328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
The low emission efficiency of clusteroluminogens restricts their practical applications in the fields of sensors and biological imaging. In this work, the clusteroluminescence of ordered/disordered polypeptides was observed, and the photoluminescence (PL) intensity of polypeptides can be modulated by the chirality of amino acid residues. Polyglutamates with different chiral compositions were synthesized, and the racemic polypeptides exhibited a significantly higher PL intensity than the enantiopure ones. This emission originates from the n-π* transition between C═O groups of polypeptides and is enhanced by clusterization of polypeptides. CD and Fourier transform infrared spectra demonstrated that the enantiopure and racemic polypeptides form α-helix and random coil structures, respectively. The disordered polypeptides can form more chain entanglements and interchain interactions because of their high flexibility, leading to more clusterizations and stronger PL intensity. The rigidity of ordered helical structures restrains the chain entanglements, and the formation of intrachain hydrogen bonds between amide groups of the backbone impairs the interchain interaction between polypeptides, resulting in lower PL intensity. The PL intensity of the polypeptides can also be manipulated by the addition of urea or trifluoroacetic acid. Our study not only elucidates the chirality/order-based structure-property relationship of clusteroluminescence in peptide-based polymers but also offers implications for the rational design of fluorescent peptides/proteins.
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Affiliation(s)
- Wangtao Zhao
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Mei Gao
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Liufen Kong
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Shunfeng Yu
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Chuanzhuang Zhao
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Chongyi Chen
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
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3
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Xu Q, Li X, Yang J, Zhang Y, Deng X, Li G, Yuan Q. Naphthyl-Poly(S-((2-carboxyethyl)thio)-l-cysteine) Peptide Amphiphiles with Different Degrees of Polymerization: Synthesis, Self-Assembly, pH/Reduction-Triggered Drug Release, and Cytotoxicity. Mol Pharm 2023; 20:1256-1268. [PMID: 36648435 DOI: 10.1021/acs.molpharmaceut.2c00925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Four peptide amphiphiles (PA1-4) with different degrees of polymerization (DP = 40, 15, 10, and 6) were synthesized by Fuchs-Farthing and ring-opening polymerization followed by post-polymerization modification, as fully characterized by 1H NMR, FT-IR, gel permeation chromatography, and circular dichroism (CD) spectroscopy. It was found that PAs could self-assemble to form regular spherical micelles in low-concentration (about 1 mg/mL) aqueous solution, which had different contents of secondary structures and mainly adopted random coil conformations. The water solubility of PAs increases with the increase of DP, the polypeptide chain stretches randomly in water, the β-sheets decrease, and the random coil conformations dominate. When the pH of PA solution decreases or increases, intramolecular hydrogen bonds break, and molecular chains stretch, leading to a decrease of α-helix, turn conformations, and an increase of β-sheets. Meanwhile, the particle size of micelles increases. At around 0.4 mg/mL, the hemolysis ability of PA2 is negligible at pH 7.4 and 6.5 and about 33% at pH 5.5. Cisplatin (CDDP) was linked to micelles by coordination bonds to explore their potential as drug carriers, exhibiting controlled pH and reduction in dual drug release effects. MTT assay showed that the HeLa cell viability was 78% when cultured in the 13.5 μg/mL PA2 blank micelles for 2 days, while the cell viability was 60% in the CDDP-loaded micelles. Furthermore, a high concentration of PA2 (about 100 mg/mL) could self-assemble into a fibrous hydrogel at pH 5.5, which self-healed 2 h after incision and self-degraded 71% within 14 days. The CDDP-loaded fiber hydrogel exhibited a sustained release effect similar to the CDDP-loaded micelles. The cytotoxicity of CDDP-loaded fibers at 48 h was detected to be the same as that of the same amount of CDDP, and the cell viability was 7%. Therefore, we provide a new strategy for the synthesis of amphiphilic peptides with potential applications in nano-drug carriers and cancer therapy.
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Affiliation(s)
- Qinming Xu
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
| | - Xing Li
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
| | - Jingang Yang
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
| | - Yan Zhang
- School of Chemical Science and Engineering, Yunnan University, Kunming650091, PR China
| | - Xiaocui Deng
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
| | - Gang Li
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
| | - Qingmei Yuan
- School of Materials and Energy, National Center for International Research on Photoelectric and Energy Materials, Yunnan University, Kunming650091, PR China
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4
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Barratt CM, Haraniya TK, Iwamasa SJ, Yun JJ, Desyatkin VG, Wilcox KG, Morozova SA, Rodionov VO. Synthesis and conformational studies of hyperbranched-core star polymers with poly(γ–benzyl-L-glutamate) arms. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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5
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Barman R, Dey P, Mondal T, Ghosh S. Synthesis and Self‐assembly of a Helical Polymer Grafted from a Foldable Polyurethane Scaffold. Chem Asian J 2019; 14:4741-4747. [DOI: 10.1002/asia.201901119] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/16/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Ranajit Barman
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Pradip Dey
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
| | - Tathagata Mondal
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
- Institut Charles Sadron 67034 Strasbourg France
| | - Suhrit Ghosh
- School of Applied and Interdisciplinary SciencesIndian Association for the Cultivation of Science 2A & 2B Raja S. C. Mullick Road Jadavpur Kolkata 700032 India
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6
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Biofilm Disruption Utilizing α/β Chimeric Polypeptide Molecular Brushes. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2278-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Xu XQ, He Y, Liu H, Wang Y. Polydiacetylene-Polyurethane Crisscross Elastomer as an Intrinsic Shape Memory Conductive Polymer. ACS Macro Lett 2019; 8:409-413. [PMID: 35651124 DOI: 10.1021/acsmacrolett.9b00179] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Owing to the high phase transition temperature and incompatibility with thermoplastic elastomers, conjugated polymers are hardly formulated as shape memory materials. This work presents a crisscross polymer composed of polyurethane and polydiacetylene. Phase separation is completely avoided based on the photoinduced polymerization of polydiacetylene from polyurethane chains. The two backbones are intercrossed and covalently linked to each other. Particularly, polyurethane acts as a soft segment to provide elastic performance, and the rigid polydiacetylene provides conductive pathways. Such a crisscross topology, combined with soft and rigid compositions, renders the possibility to serve the polymer as an intrinsically elastic conductive polymer. Intriguingly, the polymer possesses shape memory performance, meanwhile retaining the reliable conductivity. Electrical tests demonstrate that the shape memory conductive polymer is one attractive candidate for exploiting shape-customized strain sensors.
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Affiliation(s)
- Xiao-Qi Xu
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Yonglin He
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Haocheng Liu
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Yapei Wang
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
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8
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Li Y, Schacher FH, Ling J. Synthesis of Polypeptoid‐Polycaprolactone‐Polytetrahydrofuran Heterograft Molecular Polymer Brushes via a Combination of Janus Polymerization and ROMP. Macromol Rapid Commun 2019; 40:e1800905. [DOI: 10.1002/marc.201800905] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/22/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Yao Li
- MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Felix H. Schacher
- Institute of Organic Chemistry and Macromolecular Chemistry (IOMC)Friedrich‐Schiller‐University Jena Lessingstraße 8 D‐07743 Jena Germany
- Jena Center for Soft Matter (JCSM)Friedrich‐Schiller‐University Jena Philosophenweg 7 D‐07743 Jena Germany
| | - Jun Ling
- MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
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9
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Henn DM, Holmes JA, Kent EW, Zhao B. Worm-to-Sphere Shape Transition of Thermoresponsive Linear Molecular Bottlebrushes in Moderately Concentrated Aqueous Solution. J Phys Chem B 2018; 122:7015-7025. [DOI: 10.1021/acs.jpcb.8b04767] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniel M. Henn
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Jessica A. Holmes
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Ethan W. Kent
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Bin Zhao
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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10
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Cai C, Lin J, Lu Y, Zhang Q, Wang L. Polypeptide self-assemblies: nanostructures and bioapplications. Chem Soc Rev 2018; 45:5985-6012. [PMID: 27722321 DOI: 10.1039/c6cs00013d] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polypeptide copolymers can self-assemble into diverse aggregates. The morphology and structure of aggregates can be varied by changing molecular architectures, self-assembling conditions, and introducing secondary components such as polymers and nanoparticles. Polypeptide self-assemblies have gained significant attention because of their potential applications as delivery vehicles for therapeutic payloads and as additives in the biomimetic mineralization of inorganics. This review article provides an overview of recent advances in nanostructures and bioapplications related to polypeptide self-assemblies. We highlight recent contributions to developing strategies for the construction of polypeptide assemblies with increasing complexity and novel functionality that are suitable for bioapplications. The relationship between the structure and properties of the polypeptide aggregates is emphasized. Finally, we briefly outline our perspectives and discuss the challenges in the field.
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Affiliation(s)
- Chunhua Cai
- Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Yingqing Lu
- Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Qian Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
| | - Liquan Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials, State Key Laboratory of Bioreactor Engineering, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
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11
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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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12
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Fan J, Borguet YP, Su L, Nguyen TP, Wang H, He X, Zou J, Wooley KL. Two-Dimensional Controlled Syntheses of Polypeptide Molecular Brushes via N-Carboxyanhydride Ring-Opening Polymerization and Ring-Opening Metathesis Polymerization. ACS Macro Lett 2017; 6:1031-1035. [PMID: 28966880 PMCID: PMC5617330 DOI: 10.1021/acsmacrolett.7b00603] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 09/07/2017] [Indexed: 11/29/2022]
Abstract
Well-defined molecular brushes bearing polypeptides as side chains were prepared by a "grafting through" synthetic strategy with two-dimensional control over the brush molecular architectures. By integrating N-carboxyanhydride ring-opening polymerizations (NCA ROPs) and ring-opening metathesis polymerizations (ROMPs), desirable segment lengths of polypeptide side chains and polynorbornene brush backbones were independently constructed in controlled manners. The N2 flow accelerated NCA ROP was utilized to prepare polypeptide macromonomers with different lengths initiated from a norbornene-based primary amine, and those macromonomers were then polymerized via ROMP. It was found that a mixture of dichloromethane and an ionic liquid were required as the solvent system to allow for construction of molecular brush polymers having densely-grafted peptide chains emanating from a polynorbornene backbone, poly(norbornene-graft-poly(β-benzyl-l-aspartate)) (P(NB-g-PBLA)). Highly efficient postpolymerization modification was achieved by aminolysis of PBLA side chains for facile installment of functional moieties onto the molecular brushes.
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Affiliation(s)
- Jingwei Fan
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Yannick P. Borguet
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Lu Su
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Tan P. Nguyen
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Hai Wang
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Xun He
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Jiong Zou
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
| | - Karen L. Wooley
- Departments of Chemistry,
Chemical Engineering, Materials Science and Engineering, and Laboratory
for Synthetic-Biologic Interactions, Texas
A&M University, P.O. Box 30012, 3255 TAMU, College Station, Texas 77842, United
States
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13
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Ren Y, Fu H, Baumgartner R, Zhang Y, Cheng J, Lin Y. Folding Cooperativity of Synthetic Polypeptides with or without "Tertiary" Interactions. ACS Macro Lett 2017; 6:733-737. [PMID: 35650853 DOI: 10.1021/acsmacrolett.7b00324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Model-based studies on helix-coil transition and folding cooperativity of synthetic polypeptides have contributed to the understanding of protein folding and stability and to the development of polypeptide-based functional materials. Polypeptide-containing macromolecules with complex architectures, however, remain a challenge in the model-based analysis. Herein, a modified Schellman-Zimm-Bragg model has been utilized to quantitatively analyze the folding cooperativity of polypeptide-containing macromolecules. While the helix-coil transition of homopolypeptides (e.g., poly(ε-benzyloxycarbonyl-l-lysine) (PZLL)) can be described by the classic model, the folding of grafted polypeptide chains in the comb macromolecules (e.g., polynorbornene-g-poly(ε-benzyloxycarbonyl-l-lysine) (PN-g-PZLL)) cannot be accurately predicted by the existing theories, due to the side-chain interactions between grafted polypeptides in the comb macromolecules. Incorporating nonlocal interaction explicability into the statistical mechanics treatment is found to be instructive to account for the possible "tertiary" interactions of polypeptides in the macromolecules with complex architectures.
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Affiliation(s)
- Yuan Ren
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Hailin Fu
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Ryan Baumgartner
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Yanfeng Zhang
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Jianjun Cheng
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Yao Lin
- Department of Chemistry and ‡Polymer Program, Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269, United States
- Department of Chemistry and ⊥Department of Materials Science and Engineering, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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14
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Ren Y, Baumgartner R, Fu H, van der Schoot P, Cheng J, Lin Y. Revisiting the Helical Cooperativity of Synthetic Polypeptides in Solution. Biomacromolecules 2017; 18:2324-2332. [PMID: 28715182 DOI: 10.1021/acs.biomac.7b00534] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using synthetic polypeptides as a model system, the theories of helix-coil transition were developed into one of the most beautiful and fruitful subjects in macromolecular science. The classic models proposed by Schellman and Zimm-Bragg more than 50 years ago, differ in the assumption on whether the configuration of multiple helical sequences separated by random coil sections is allowed in a longer polypeptide chain. Zimm also calculated the critical chain lengths that facilitate such interrupted helices in different solvent conditions. The experimental validation of Zimm's prediction, however, was not carefully examined at that time. Herein, we synthesize a series of homopolypeptide samples with different lengths, to systematically examine their helix-coil transition and folding cooperativity in solution. We find that for longer chains, polypeptides do exist as interrupted helices with scattered coil sections even in helicogenic solvent conditions, as predicted in the Zimm-Bragg model. The critical chain lengths that facilitate such interrupted helices, however, are substantially smaller than Zimm's original estimation. The inaccuracy is in part due to an approximation that Zimm made in simplifying the calculation. But more importantly, we find there exist intramolecular interactions between different structural segments in the longer polypeptides, which are not considered in the classic helix-coil theories. As such, even the Zimm-Bragg model in its exact form cannot fully describe the transition behavior and folding cooperativity of longer polypeptides. The results suggest that long "all-helix" chains may be much less prevalent in solution than previously imagined, and a revised theory is required to accurately account for the helix-coil transition of the longer chains with potential "non-local" intramolecular interactions.
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Affiliation(s)
| | | | | | - Paul van der Schoot
- Department of Applied Physics, Eindhoven University of Technology , 5600 MB Eindhoven, The Netherlands
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15
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Henn DM, Fu W, Mei S, Li CY, Zhao B. Temperature-Induced Shape Changing of Thermosensitive Binary Heterografted Linear Molecular Brushes between Extended Wormlike and Stable Globular Conformations. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00150] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Daniel M. Henn
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Wenxin Fu
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Shan Mei
- Department
of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Christopher Y. Li
- Department
of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Bin Zhao
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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16
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Sailaja GS, Ramesh P, Vellappally S, Anil S, Varma HK. Biomimetic approaches with smart interfaces for bone regeneration. J Biomed Sci 2016; 23:77. [PMID: 27814702 PMCID: PMC5097415 DOI: 10.1186/s12929-016-0284-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 09/05/2016] [Indexed: 01/18/2023] Open
Abstract
A 'smart tissue interface' is a host tissue-biomaterial interface capable of triggering favourable biochemical events inspired by stimuli responsive mechanisms. In other words, biomaterial surface is instrumental in dictating the interface functionality. This review aims to investigate the fundamental and favourable requirements of a 'smart tissue interface' that can positively influence the degree of healing and promote bone tissue regeneration. A biomaterial surface when interacts synergistically with the dynamic extracellular matrix, the healing process become accelerated through development of a smart interface. The interface functionality relies equally on bound functional groups and conjugated molecules belonging to the biomaterial and the biological milieu it interacts with. The essential conditions for such a special biomimetic environment are discussed. We highlight the impending prospects of smart interfaces and trying to relate the design approaches as well as critical factors that determine species-specific functionality with special reference to bone tissue regeneration.
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Affiliation(s)
- G S Sailaja
- Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin, 682 022, India.
| | - P Ramesh
- Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695 012, India
| | - Sajith Vellappally
- Dental Biomaterials Research Chair, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Sukumaran Anil
- Department of Preventive Dental Sciences, College of Dentistry, Prince Sattam Bin Abdulaziz University, Riyadh, Post Box 153, AIKharj 11942, Saudi Arabia
| | - H K Varma
- Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram, 695 012, India.
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17
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Wei Z, Zhu S, Zhao H. Brush macromolecules with thermo-sensitive coil backbones and pendant polypeptide side chains: synthesis, self-assembly and functionalization. Polym Chem 2015. [DOI: 10.1039/c4py01268b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Macromolecular brushes with thermo-sensitive coil backbones and pendant poly(γ-benzyl-l-glutamate) side chains were synthesized by reversible addition–fragmentation chain transfer and ring-opening polymerization. Functionalization and self-assembly of the macromolecules were investigated.
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Affiliation(s)
- Zheng Wei
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Department of Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Shuzhe Zhu
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Department of Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Hanying Zhao
- Key Laboratory of Functional Polymer Materials
- Ministry of Education
- Department of Chemistry
- Nankai University
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
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18
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Zhang Y, Yin Q, Lu H, Xia H, Lin Y, Cheng J. PEG-Polypeptide Dual Brush Block Copolymers: Synthesis and Application in Nanoparticle Surface PEGylation. ACS Macro Lett 2013; 2:809-813. [PMID: 24159425 PMCID: PMC3804265 DOI: 10.1021/mz4003672] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Amphiphilic polypeptide-containing hybrid dual brush block copolymers with controlled molecular weights and narrow molecular weight distributions were synthesized in one pot via ring-opening metathesis polymerization of sequentially added norbornyl-PEG and N-(2-((trimethylsilyl)amino)ethyl)-5-norbornene-endo-2,3-dicarboximide (M1) followed by ring-opening polymerization of amino acid N-carboxyanhydrides. Polylactide nanoparticles coated with these am phiphilic dual brush block copolymers showed significantly improved stability in PBS solution compared to those coated with amphiphilic linear block copolymers such as PEG-polylactide and PEG-polypeptides.
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Affiliation(s)
- Yanfeng Zhang
- Department of Materials Science and Engineering, University of Illinois at Urbana—Champaign, Urbana, IL 61801, USA
| | - Qian Yin
- Department of Materials Science and Engineering, University of Illinois at Urbana—Champaign, Urbana, IL 61801, USA
| | - Hua Lu
- Department of Materials Science and Engineering, University of Illinois at Urbana—Champaign, Urbana, IL 61801, USA
| | - Hongwei Xia
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269,USA
| | - Yao Lin
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269,USA
| | - Jianjun Cheng
- Department of Materials Science and Engineering, University of Illinois at Urbana—Champaign, Urbana, IL 61801, USA
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19
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Chen L, Jiang T, Lin J, Cai C. Toroid formation through self-assembly of graft copolymer and homopolymer mixtures: experimental studies and dissipative particle dynamics simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8417-8426. [PMID: 23738828 DOI: 10.1021/la401553a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Self-assembly of mixture systems containing poly(acrylic acid)-g-poly(γ-benzyl-L-glutamate) graft copolymers (PAA-g-PBLG) and PBLG homopolymers in aqueous solution was investigated by both experiments and computer simulations. It was found that the aggregate morphologies, such as rods, curved rods, and toroids, could be tuned by the homopolymer content. The toroidal micelles with uniform size were formed when the homopolymer content in the hybrid aggregates is higher. The effect of added water content on the toroid formation process was studied. Rods and curved rods were observed sequentially before formation of toroids. We also performed dissipative particle dynamics (DPD) simulations to verify the structure transition and explore the formation mechanism of the toroidal aggregates. The DPD results are in good agreement with the experimental findings and provide additional information such as chain distribution in aggregates, which is difficult to be gained through experiments. On the basis of the experimental and simulation results, the formation mechanism of the toroidal micelles was suggested.
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Affiliation(s)
- Lili Chen
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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20
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SYNTHESIS OF TOOTHBRUSH COPOLYPEPTIDES BASED ON POLYLYSINE BACKBONE. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Fu X, Shen Y, Fu W, Li Z. Thermoresponsive Oligo(ethylene glycol) Functionalized Poly-l-cysteine. Macromolecules 2013. [DOI: 10.1021/ma400678w] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaohui Fu
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yong Shen
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wenxin Fu
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhibo Li
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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22
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Hybrid Block Copolymers Constituted by Peptides and Synthetic Polymers: An Overview of Synthetic Approaches, Supramolecular Behavior and Potential Applications. Polymers (Basel) 2013. [DOI: 10.3390/polym5010188] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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23
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Binder K, Butt HJ, Floudas G, Frey H, Hsu HP, Landfester K, Kolb U, Kühnle A, Maskos M, Müllen K, Paul W, Schmidt M, Spiess HW, Virnau P. Structure Formation of Polymeric Building Blocks: Complex Polymer Architectures. FROM SINGLE MOLECULES TO NANOSCOPICALLY STRUCTURED MATERIALS 2013. [DOI: 10.1007/12_2013_230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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24
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Zhai S, Song X, Feng C, Jiang X, Li Y, Lu G, Huang X. Synthesis of α-helix-containing PPEGMEA-g-PBLG, well-defined amphiphilic graft copolymer, by sequential SET-LRP and ROP. Polym Chem 2013. [DOI: 10.1039/c3py00474k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Li W, Zhang X, Wang J, Qiao X, Liu K, Zhang A. Peptidic molecular brushes with enhanced chirality. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26208] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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26
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Zeng X, Li J, Zheng J, Pan Y, Wang J, Zhang L, He X, Liu D. Amphiphilic cylindrical copolypeptide brushes as potential nanocarriers for the simultaneous encapsulation of hydrophobic and cationic drugs. Colloids Surf B Biointerfaces 2012; 94:324-32. [DOI: 10.1016/j.colsurfb.2012.02.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Revised: 02/07/2012] [Accepted: 02/07/2012] [Indexed: 10/28/2022]
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27
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Shao H, Bewick NA, Parquette JR. Intramolecular chiral communication in peptide–dendron hybrids. Org Biomol Chem 2012; 10:2377-9. [DOI: 10.1039/c2ob07014f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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