1
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Yamaleyeva DN, Makita N, Hwang D, Haney MJ, Jordan R, Kabanov AV. Poly(2-oxazoline)-Based Polyplexes as a PEG-Free Plasmid DNA Delivery Platform. Macromol Biosci 2023; 23:e2300177. [PMID: 37466165 DOI: 10.1002/mabi.202300177] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 06/25/2023] [Accepted: 07/04/2023] [Indexed: 07/20/2023]
Abstract
The present study expands the versatility of cationic poly(2-oxazoline) (POx) copolymers as a polyethylene glycol (PEG)-free platform for gene delivery to immune cells, such as monocytes and macrophages. Several block copolymers are developed by varying nonionic hydrophilic blocks (poly(2-methyl-2-oxazoline) (pMeOx) or poly(2-ethyl-2-oxazoline) (pEtOx), cationic blocks, and an optional hydrophobic block (poly(2-isopropyl-2-oxazoline) (iPrOx). The cationic blocks are produced by side chain modification of 2-methoxy-carboxyethyl-2-oxazoline (MestOx) block precursor with diethylenetriamine (DET) or tris(2-aminoethyl)amine (TREN). For the attachment of a targeting ligand, mannose, azide-alkyne cycloaddition click chemistry methods are employed. Of the two cationic side chains, polyplexes made with DET-containing copolymers transfect macrophages significantly better than those made with TREN-based copolymer. Likewise, nontargeted pEtOx-based diblock copolymer is more active in cell transfection than pMeOx-based copolymer. The triblock copolymer with hydrophobic block iPrOx performs poorly compared to the diblock copolymer which lacks this additional block. Surprisingly, attachment of a mannose ligand to either copolymer is inhibitory for transfection. Despite similarities in size and design, mannosylated polyplexes result in lower cell internalization compared to nonmannosylated polyplexes. Thus, PEG-free, nontargeted DET-, and pEtOx-based diblock copolymer outperforms other studied structures in the transfection of macrophages and displays transfection levels comparable to GeneJuice, a commercial nonlipid transfection reagent.
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Affiliation(s)
- Dina N Yamaleyeva
- Joint UNC-CH and NC State Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
| | - Naoki Makita
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
- Formulation Research & Development Laboratories, Technology Research & Development, Sumitomo Pharma Co., Ltd., Suita, Osaka, 564-0053, Japan
| | - Duhyeong Hwang
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
- Department of Pharmaceutical Engineering, Dankook University, 119 Dandae-ro, Dongnam-gu, Cheonan, 31116, South Korea
| | - Matthew J Haney
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
| | - Rainer Jordan
- Department Chemie, Technische Universität Dresden, Zellescher Weg 19, 01069, Dresden, Germany
| | - Alexander V Kabanov
- Joint UNC-CH and NC State Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
- Center for Nanotechnology in Drug Delivery and Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-7575, USA
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2
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Zhu H, Liu R, Shang Y, Sun L. Polylysine complexes and their biomedical applications. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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3
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Yuan X, Luo SZ, Chen L. Novel branched amphiphilic peptides for nucleic acids delivery. Int J Pharm 2022; 624:121983. [PMID: 35803534 DOI: 10.1016/j.ijpharm.2022.121983] [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: 02/22/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 11/25/2022]
Abstract
Highly efficient and safe non-viral vectors for nucleic acids delivery have attracted much attention due to their potential applications in gene therapy, gene editing and vaccination against infectious diseases, and various materials have been investigated and designed as delivery vectors. Herein, we designed a series of branched amphiphilic peptides (BAPs) and tested their applications as pDNA/mRNA delivery vectors. The BAP structure was inspired by the phospholipids, in which lysine oligomers were used as the "polar head", segments containing phenylalanine, histidine and leucine were used as the "hydrophobic tails", and a lysine residue was used as the branching point. By comparing the gel retardation, particle sizes and zeta potentials of the BAP/pDNA complexes of the short-branch BAPs (BAP-V1 ∼ BAP-V4), we determined the optimal lysine oligomer was K6. However, their cell transfection efficiencies were not satisfactory, and thus three long-branch BAPs (BAP-V5 ∼ BAP-V7) were further designed. In these long-branch BAPs, more hydrophobic residues were added and the overall amphiphilicity increased accordingly. The results showed that these three BAPs could effectively compact the nucleic acids, including both pDNA and mRNA, and all could transfect nucleic acids into HEK 293 cells, with low cytotoxicity. Among the three long-branch BAPs, BAP-V7 (bis(FFLFFHHH)-K-K6) showed the best transfection efficiency at N/P = 10, which was better than the commercial transfection reagent PEI-25 K. These results indicate that increased amphiphilicity would also benefit for BAP mediated nucleic acid delivery. The designed BAPs provide more documents of such novel type of nucleic acids delivery vectors, which is worth of further investigation as a new gene theranostic platforms.
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Affiliation(s)
- Xiushuang Yuan
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China
| | - Shi-Zhong Luo
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Long Chen
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
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4
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Zheng M, Pan M, Zhang W, Lin H, Wu S, Lu C, Tang S, Liu D, Cai J. Poly(α-l-lysine)-based nanomaterials for versatile biomedical applications: Current advances and perspectives. Bioact Mater 2021; 6:1878-1909. [PMID: 33364529 PMCID: PMC7744653 DOI: 10.1016/j.bioactmat.2020.12.001] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 02/05/2023] Open
Abstract
Poly(α-l-lysine) (PLL) is a class of water-soluble, cationic biopolymer composed of α-l-lysine structural units. The previous decade witnessed tremendous progress in the synthesis and biomedical applications of PLL and its composites. PLL-based polymers and copolymers, till date, have been extensively explored in the contexts such as antibacterial agents, gene/drug/protein delivery systems, bio-sensing, bio-imaging, and tissue engineering. This review aims to summarize the recent advances in PLL-based nanomaterials in these biomedical fields over the last decade. The review first describes the synthesis of PLL and its derivatives, followed by the main text of their recent biomedical applications and translational studies. Finally, the challenges and perspectives of PLL-based nanomaterials in biomedical fields are addressed.
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Affiliation(s)
- Maochao Zheng
- Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China
| | - Miao Pan
- Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China
| | - Wancong Zhang
- The Second Affiliated Hospital of Shantou University Medical College, 69 Dongxiabei Road, Shantou, 515041, China
| | - Huanchang Lin
- Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China
| | - Shenlang Wu
- Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China
| | - Chao Lu
- College of Pharmacy, Jinan University, Guangzhou, 511443, China
| | - Shijie Tang
- The Second Affiliated Hospital of Shantou University Medical College, 69 Dongxiabei Road, Shantou, 515041, China
| | - Daojun Liu
- Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
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5
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Robla S, Alonso MJ, Csaba NS. Polyaminoacid-based nanocarriers: a review of the latest candidates for oral drug delivery. Expert Opin Drug Deliv 2020; 17:1081-1092. [DOI: 10.1080/17425247.2020.1776698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Sandra Robla
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
| | - Maria José Alonso
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
| | - Noemi S. Csaba
- Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
- Department of Pharmacology, Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Santiago de Compostela, Campus Vida, Santiago de Compostela, Spain
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6
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Tsuchiya K, Numata K. Facile terminal functionalization of peptides by protease-catalyzed chemoenzymatic polymerization toward synthesis of polymeric architectures consisting of peptides. Polym Chem 2020. [DOI: 10.1039/c9py01335k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Terminal functionalized polypeptides were synthesized in one-pot chemoenzymatic polymerization using protease for constructing special polymeric architectures.
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Affiliation(s)
- Kousuke Tsuchiya
- Biomacromolecules Research Team
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
- Japan
| | - Keiji Numata
- Biomacromolecules Research Team
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
- Japan
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7
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Sogawa H, Katashima T, Numata K. A covalently crosslinked silk fibroin hydrogel using enzymatic oxidation and chemoenzymatically synthesized copolypeptide crosslinkers consisting of a GPG tripeptide motif and tyrosine: control of gelation and resilience. Polym Chem 2020. [DOI: 10.1039/d0py00187b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A covalently crosslinked silk fibroin hydrogel was successfully formedviaan enzymatic crosslinking reaction using copolypeptides, which consist of a glycine–proline–glycine tripeptide motif and tyrosine, as linker molecules.
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Affiliation(s)
- Hiromitsu Sogawa
- Biomacromolecules Research Team
- RIKEN Center for Sustainable Resource Science
- Saitama
- Japan
| | - Takuya Katashima
- Biomacromolecules Research Team
- RIKEN Center for Sustainable Resource Science
- Saitama
- Japan
| | - Keiji Numata
- Biomacromolecules Research Team
- RIKEN Center for Sustainable Resource Science
- Saitama
- Japan
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8
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Periodic introduction of aromatic units in polypeptides via chemoenzymatic polymerization to yield specific secondary structures with high thermal stability. Polym J 2019. [DOI: 10.1038/s41428-019-0242-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Gimenez-Dejoz J, Tsuchiya K, Numata K. Insights into the Stereospecificity in Papain-Mediated Chemoenzymatic Polymerization from Quantum Mechanics/Molecular Mechanics Simulations. ACS Chem Biol 2019; 14:1280-1292. [PMID: 31063345 DOI: 10.1021/acschembio.9b00259] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemoenzymatic peptide synthesis is an efficient and clean method to generate polypeptides for new applications in the fields of biomedical and functional materials. However, this enzyme-mediated synthesis is dependent on the reaction rate of the protease biocatalyst, which is essentially determined by the natural substrate specificity of the enzyme. Papain, one of the most studied cysteine proteases, is extensively used for the chemoenzymatic synthesis of new polypeptides. Similar to most proteases, papain displays high stereospecificity toward l-amino acids, with limited reactivity for the d-stereoisomer counterparts. However, the incorporation of d-amino acids into peptides is a promising approach to increase their biostability by conferring intrinsic resistance to proteolysis. Herein, we determined the stereospecific-limiting step of the papain-mediated polymerization reaction with the chiral substrates l/d-alanine ethyl ester (Ala-OEt). Afterward, we used Quantum Mechanics/Molecular Mechanics (QM/MM) simulations to study the catalytic mechanism at atomic level of detail and investigate the origin of its stereospecificity. The experimental and computational results show that papain is able to attack both l- and d-stereoisomers of Ala-OEt, forming an enzyme-substrate intermediate, and that the two reactions display a similar activation barrier. Moreover, we found that the reduced catalytic activity of papain in the polymerization of d-amino acids arises from the aminolysis step of the reaction, in which l-Ala-OEt displays a significantly lower free-energy barrier (12 kcal/mol) than d-Ala-OEt (30 kcal/mol). Further simulations suggest that the main factor affecting the polymerization of d-amino acids is the configuration of the d-acyl-intermediate enzyme, and in particular the orientation of its methyl group, which hinders the nucleophilic attack by other monomers and thus the formation of polypeptides.
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Affiliation(s)
- Joan Gimenez-Dejoz
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kousuke Tsuchiya
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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10
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Fagerland J, Pappalardo D, Schmidt B, Syrén PO, Finne-Wistrand A. Template-Assisted Enzymatic Synthesis of Oligopeptides from a Polylactide Chain. Biomacromolecules 2017; 18:4271-4280. [PMID: 29131581 DOI: 10.1021/acs.biomac.7b01315] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Peptides are often attached to polymer materials, as bioactive components, for the control of interactions between the material and its surrounding proteins and cells. However, synthesizing peptides and attaching them to polymers can be challenging and laborious. Herein, we describe the grafting of oligopeptides to an aliphatic polyester, using a one-step chemo-enzymatic synthesis with papain as the biocatalyst. To enable enzyme-mediated functionalization of the polyester, ethyl hept-6-enoylalaninate (grafter) was synthesized and attached to polylactide chains using thiol-ene click reactions. The oligopeptides were grafted onto the polylactide chains using two different synthetic routes: the grafting from strategy, in which the grafter was attached to the polyester prior to oligopeptide synthesis, or the grafting to strategy, in which oligopeptides were synthesized on the grafter first, then attached to the polymer chain. The final products were analyzed and their structures were confirmed using nuclear magnetic resonance (NMR). The peptide attachment was evaluated using size exclusion chromatography (SEC), contact angle measurement and energy-dispersive X-ray spectroscopy-scanning electron microscopy (EDS-SEM). Furthermore, the mechanistic aspects of the synthesis of the oligopeptides on the grafter were studied using molecular dynamics (MD) simulations. The simulation revealed that hydrogen bonding (between the P1 amide nitrogen of the grafter backbone and the carbonyl oxygen of D158 in the papain) maintain the grafter in a productive conformation to stabilize the transition state of nitrogen inversion, a key step of the biocatalytic mechanism. Apart from being biologically relevant, both experimental and computational results suggest that the designed grafter is a good template for initiating chemo-enzymatic synthesis. The results also showed that the grafting to strategy was more successful compared to the grafting from strategy. Overall, a successful synthesis of predefined peptide functionalized polylactide was prepared, where the oligopeptides were grafted in an easy, time efficient, and environmentally friendly way.
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Affiliation(s)
- Jenny Fagerland
- KTH Royal Institute of Technology , Department of Fibre and Polymer Technology, Teknikringen 56, 100 44 Stockholm, Sweden
| | - Daniela Pappalardo
- KTH Royal Institute of Technology , Department of Fibre and Polymer Technology, Teknikringen 56, 100 44 Stockholm, Sweden.,Department of Science and Technology, University of Sannio , via dei Mulini 59/A, 82100 Benevento, Italy
| | - Björn Schmidt
- KTH Royal Institute of Technology , School of Chemical Science and Engineering, Protein Engineering of Enzymes, Box 1031, 171 21 Solna, Sweden
| | - Per-Olof Syrén
- KTH Royal Institute of Technology , School of Chemical Science and Engineering, Protein Engineering of Enzymes, Box 1031, 171 21 Solna, Sweden
| | - Anna Finne-Wistrand
- KTH Royal Institute of Technology , Department of Fibre and Polymer Technology, Teknikringen 56, 100 44 Stockholm, Sweden
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11
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Tsuchiya K, Numata K. Chemoenzymatic Synthesis of Polypeptides for Use as Functional and Structural Materials. Macromol Biosci 2017; 17. [PMID: 28722358 DOI: 10.1002/mabi.201700177] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 06/20/2017] [Indexed: 12/13/2022]
Abstract
Polypeptides inspired by the natural functional and structural proteins present in living systems are promising materials for various fields in terms of their versatile functionality and physical properties. Designing and synthesizing mimetic sequences of specific peptide motifs in proteins are important for exploring the functionality of natural proteins. Chemoenzymatic polymerization, which utilizes aminolysis (i.e., the reverse reaction of hydrolysis catalyzed by proteases), is a useful technique for synthesizing artificial polypeptide materials and has several advantages, including facile synthesis protocols, environmental friendliness, scalability, and atom economy. In this review, recent progress in chemoenzymatic polypeptide synthesis for the production of functional and structural materials for various applications is summarized in conjunction with the current status of technical challenges in the field.
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Affiliation(s)
- Kousuke Tsuchiya
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Keiji Numata
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
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12
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Chuah JA, Matsugami A, Hayashi F, Numata K. Self-Assembled Peptide-Based System for Mitochondrial-Targeted Gene Delivery: Functional and Structural Insights. Biomacromolecules 2016; 17:3547-3557. [PMID: 27696822 DOI: 10.1021/acs.biomac.6b01056] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Human mitochondrial dysfunction can lead to severe and often deadly diseases, for which there are no known cures. Although the targeted delivery of therapeutic gene to mitochondria is a promising approach to alleviate these disorders, gene carrier systems for the selective delivery of functional DNA into the mitochondria of living mammalian cells are currently unavailable. Here we rationally developed dual-domain peptides containing DNA-condensing/cell-penetrating/endosome-disruptive and mitochondria-targeting sequences. Secondary structures of the dual-domain peptides were analyzed, and variations in the physicochemical properties (stability, size, and ζ potential) of peptide/DNA complexes were studied as a function of peptide-to-DNA ratio and serum addition. An optimized formulation, identified through qualitative and quantitative studies, fulfills the fundamental prerequisites for mitochondria-specific DNA delivery, successfully transfecting a high proportion (82 ± 2%) of mitochondria in a human cell line with concomitant biocompatibility. Nuclear magnetic resonance studies confirmed the effectiveness of our bipartite peptide design with segregated functions: a helical domain necessary for mitochondrial import and an unstructured region for interaction with DNA involving lysine residues. Further analyses revealed that the lysine-specific interaction assisted the self-organization of the peptide and the DNA cargo, leading to a structural arrangement within the formed complex that is crucial for its biological efficiency. Thus the reported gene vector represents a new and reliable tool to uncover the complexity of mitochondrial transfection.
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Affiliation(s)
- Jo-Ann Chuah
- Enzyme Research Team, Biomass Engineering Research Division, Center for Sustainable Resource Science, RIKEN , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Akimasa Matsugami
- Systems and Structural Biology Center, Yokohama Institute, RIKEN , Tsurumi, 1-7-22 Suehiro-cho, Tsurumi-ku, Kanagawa 230-0045, Japan
| | - Fumiaki Hayashi
- Systems and Structural Biology Center, Yokohama Institute, RIKEN , Tsurumi, 1-7-22 Suehiro-cho, Tsurumi-ku, Kanagawa 230-0045, Japan
| | - Keiji Numata
- Enzyme Research Team, Biomass Engineering Research Division, Center for Sustainable Resource Science, RIKEN , 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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13
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Papain-Catalyzed Synthesis of Polyglutamate Containing a Nylon Monomer Unit. Polymers (Basel) 2016; 8:polym8050194. [PMID: 30979286 PMCID: PMC6432315 DOI: 10.3390/polym8050194] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 12/21/2022] Open
Abstract
Peptides have the potential to serve as an alternative for petroleum-based polymers to support a sustainable society. However, they lack thermoplasticity, owing to their strong intermolecular interactions. In contrast, nylon is famous for its thermoplasticity and chemical resistance. Here, we synthesized peptides containing a nylon unit to modify their thermal properties by using papain-catalyzed chemoenzymatic polymerization. We used l-glutamic acid alkyl ester as the amino acid monomer and nylon 1, 3, 4, and 6 alkyl esters as the nylon unit. Papain catalyzed the copolymerization of glutamic acid with nylon 3, 4, and 6 alkyl esters, whereas the nylon 1 unit could not be copolymerized. Other proteases used in this study, namely, bromelain, proteinase K, and Candida antarctica lipase (CALB), were not able to copolymerize with any nylon units. The broad substrate specificity of papain enabled the copolymerization of l-glutamic acid with a nylon unit. The peptides with nylon units demonstrated different thermal profiles from that of oligo(l-glutamic acid). Therefore, the resultant peptides with various nylon units are expected to form fewer intermolecular hydrogen bonds, thus altering their thermal properties. This finding is expected to broaden the applications of peptide materials and chemoenzymatic polymerization.
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14
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Ma Y, Li Z, Numata K. Synthetic Short Peptides for Rapid Fabrication of Monolayer Cell Sheets. ACS Biomater Sci Eng 2016; 2:697-706. [DOI: 10.1021/acsbiomaterials.6b00113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yinan Ma
- Laboratory
of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Enzyme
Research Team, Biomass Engineering Program Cooperation Division, Center
for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Zhibo Li
- Laboratory
of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School
of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Keiji Numata
- Enzyme
Research Team, Biomass Engineering Program Cooperation Division, Center
for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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15
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Ageitos JM, Yazawa K, Tateishi A, Tsuchiya K, Numata K. The Benzyl Ester Group of Amino Acid Monomers Enhances Substrate Affinity and Broadens the Substrate Specificity of the Enzyme Catalyst in Chemoenzymatic Copolymerization. Biomacromolecules 2015; 17:314-23. [PMID: 26620763 DOI: 10.1021/acs.biomac.5b01430] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The chemoenzymatic polymerization of amino acid monomers by proteases involves a two-step reaction: the formation of a covalent acyl-intermediate complex between the protease and the carboxyl ester group of the monomer and the subsequent deacylation of the complex by aminolysis to form a peptide bond. Although the initiation with the ester group of the monomer is an important step, the influence of the ester group on the polymerization has not been studied in detail. Herein, we studied the effect of the ester groups (methyl, ethyl, benzyl, and tert-butyl esters) of alanine and glycine on the synthesis of peptides using papain as the catalyst. Alanine and glycine were selected as monomers because of their substantially different affinities toward papain. The efficiency of the polymerization of alanine and glycine benzyl esters was much greater than that of the other esters. The benzyl ester group therefore allowed papain to equally polymerize alanine and glycine, even though the affinity of alanine toward papain is substantially higher. The characterization of the copolymers of alanine and glycine in terms of the secondary structure and thermal properties revealed that the thermal stability of the peptides depends on the amino acid composition and resultant secondary structure. The current results indicate that the nature of the ester group drastically affects the polymerization efficiency and broadens the substrate specificity of the protease.
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Affiliation(s)
- Jose Manuel Ageitos
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kenjiro Yazawa
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Ayaka Tateishi
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kousuke Tsuchiya
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Keiji Numata
- Enzyme Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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16
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Ma Y, Sato R, Li Z, Numata K. Chemoenzymatic Synthesis of Oligo(L-cysteine) for Use as a Thermostable Bio-Based Material. Macromol Biosci 2015; 16:151-9. [PMID: 26388290 DOI: 10.1002/mabi.201500255] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 08/13/2015] [Indexed: 11/06/2022]
Abstract
Oligomerization of thiol-unprotected L-cysteine ethyl ester (Cys-OEt) catalyzed by proteinase K in aqueous solution has been used to synthesize oligo(L-cysteine) (OligoCys) with a well-defined chemical structure and relatively large degree of polymerization (DP) up to 16-17 (average 8.8). By using a high concentration of Cys-OEt, 78.0% free thiol content was achieved. The thermal properties of OligoCys are stable, with no glass transition until 200 °C, and the decomposition temperature could be increased by oxidation. Chemoenzymatically synthesized OligoCys has great potential for use as a thermostable bio-based material with resistance to oxidation.
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Affiliation(s)
- Yinan Ma
- Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Ryota Sato
- Enzyme Research Team, Biomass Engineering Program Cooperation Division, Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Zhibo Li
- Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. .,School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Keiji Numata
- Enzyme Research Team, Biomass Engineering Program Cooperation Division, Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
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Numata K. Poly(amino acid)s/polypeptides as potential functional and structural materials. Polym J 2015. [DOI: 10.1038/pj.2015.35] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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