1
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Kurita T, Higashi M, Gimenez-Dejoz J, Fujita S, Uji H, Sato H, Numata K. Synthesis of All-Peptide-Based Rotaxane from a Proline-Containing Cyclic Peptide. Biomacromolecules 2024; 25:3661-3670. [PMID: 38807574 DOI: 10.1021/acs.biomac.4c00257] [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: 05/30/2024]
Abstract
Rotaxane cross-linkers enhance the toughness of the resulting rotaxane cross-linked polymers through a stress dispersion effect, which is attributed to the mobility of the interlocked structure. To date, the compositional diversity of rotaxane cross-linkers has been limited, and the poor compatibility of these cross-linkers with peptides and proteins has made their use in such materials challenging. The synthesis of a rotaxane composed of peptides may result in a biodegradable cross-linker that is compatible with peptides and proteins, allowing the fortification of polypeptides and proteins and ultimately leading to the development of innovative materials that possess excellent mechanical properties and biodegradability. However, the chemical synthesis of all-peptide-based rotaxanes has remained elusive because of the absence of strong binding motifs in peptides, which prevents an axial peptide from penetrating a cyclic peptide. Here, we synthesized all-peptide-based rotaxanes using an active template method for proline-containing cyclic peptides. The results of molecular dynamics simulations suggested that cyclic peptides with an expansive inner cavity and carbonyl oxygens oriented toward the center are favorable for rotaxane synthesis. This rotaxane synthesis method is expected to accelerate the synthesis of peptides and proteins with mechanically interlocked structures, potentially leading to the development of peptide- and protein-based materials with unprecedented functionalities.
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Affiliation(s)
- Taichi Kurita
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masahiro Higashi
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Joan Gimenez-Dejoz
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Life Sciences Department, Barcelona Supercomputing Center, Jordi Girona 31, 08034 Barcelona, Spain
| | - Seiya Fujita
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hirotaka Uji
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hirofumi Sato
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishibiraki-cho 34-4, Sakyou-ku, Kyoto 606-8103, Japan
| | - Keiji Numata
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Institute for Advanced Biosciences, Keio University, Nipponkoku 403-1, Daihouji, Tsuruoka, Yamagata 997-0017, Japan
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2
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Blamires SJ, Rawal A, Edwards AD, Yarger JL, Oberst S, Allardyce BJ, Rajkhowa R. Methods for Silk Property Analyses across Structural Hierarchies and Scales. Molecules 2023; 28:molecules28052120. [PMID: 36903366 PMCID: PMC10003856 DOI: 10.3390/molecules28052120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/13/2023] [Accepted: 02/20/2023] [Indexed: 03/02/2023] Open
Abstract
Silk from silkworms and spiders is an exceptionally important natural material, inspiring a range of new products and applications due to its high strength, elasticity, and toughness at low density, as well as its unique conductive and optical properties. Transgenic and recombinant technologies offer great promise for the scaled-up production of new silkworm- and spider-silk-inspired fibres. However, despite considerable effort, producing an artificial silk that recaptures the physico-chemical properties of naturally spun silk has thus far proven elusive. The mechanical, biochemical, and other properties of pre-and post-development fibres accordingly should be determined across scales and structural hierarchies whenever feasible. We have herein reviewed and made recommendations on some of those practices for measuring the bulk fibre properties; skin-core structures; and the primary, secondary, and tertiary structures of silk proteins and the properties of dopes and their proteins. We thereupon examine emerging methodologies and make assessments on how they might be utilized to realize the goal of developing high quality bio-inspired fibres.
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Affiliation(s)
- Sean J. Blamires
- School of Biological, Earth and Environmental Science, University of New South Wales, Sydney, NSW 2052, Australia
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
- School of Mechanical and Mechatronic Engineering, University of Technology, Sydney, NSW 2007, Australia
- Correspondence:
| | - Aditya Rawal
- Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
| | - Angela D. Edwards
- School of Molecular Science, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Jeffrey L. Yarger
- School of Molecular Science, Arizona State University, Tempe, AZ 85287-1604, USA
| | - Sebastian Oberst
- School of Mechanical and Mechatronic Engineering, University of Technology, Sydney, NSW 2007, Australia
| | | | - Rangam Rajkhowa
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia
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3
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Watanabe T, Terada K, Takemura S, Masunaga H, Tsuchiya K, Lamprou A, Numata K. Chemoenzymatic Polymerization of l-Serine Ethyl Ester in Aqueous Media without Side-Group Protection. ACS POLYMERS AU 2022; 2:147-156. [PMID: 36855524 PMCID: PMC9954318 DOI: 10.1021/acspolymersau.1c00052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Poly(l-serine) (polySer) has tremendous potential as a polypeptide-based functional material due to the utility of the hydroxyl group on its side chain; however, tedious protection/deprotection of the hydroxyl groups is required for its synthesis. In this study, polySer was synthesized by the chemoenzymatic polymerization (CEP) of l-serine ethyl ester (Ser-OEt) or l-serine methyl ester (Ser-OMe) using papain as a catalyst in an aqueous medium. The CEP of Ser-OEt proceeded at basic pH ranging from 7.5 to 9.5 and resulted in the maximum precipitate yield of polySer at an optimized pH of 8.5. A series of peaks detected by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry revealed that the formed precipitate consisted of polySer with a degree of polymerization ranging from 5 to 22. Moreover, infrared spectroscopy, circular dichroism spectroscopy, and synchrotron wide-angle X-ray diffraction measurements indicated that the obtained polySer formed a β-sheet/strand structure. This is the first time the synthesis of polySer was realized by CEP in aqueous solution without protecting the hydroxyl group of the Ser monomer.
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Affiliation(s)
- Takumi Watanabe
- Department
of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kayo Terada
- Department
of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shogo Takemura
- Department
of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroyasu Masunaga
- Japan
Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Kousuke Tsuchiya
- Department
of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan,Biomacromolecules
Research Team, RIKEN Center for Sustainable
Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan,
| | - Alexandros Lamprou
- Innovation
Campus Asia Pacific (Shanghai), BASF Advanced
Chemicals Co., Ltd., No 300, Jiangxinsha Road, Pudong, Shanghai 200137, P.R. China
| | - Keiji Numata
- Department
of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8510, Japan,Biomacromolecules
Research Team, RIKEN Center for Sustainable
Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan,
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4
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Chen J, Tsuchiya K, Masunaga H, Malay AD, Numata K. A silk composite fiber reinforced by telechelic-type polyalanine and its strengthening mechanism. Polym Chem 2022. [DOI: 10.1039/d2py00030j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A telechelic-type polyalanine was doped in silkworm silk fibroins to prepare reinforced composite fibers, which exhibited 42% and 51% higher mechanical properties than silk-only fibers in terms of tensile strength and toughness, respectively.
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Affiliation(s)
- Jianming Chen
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kousuke Tsuchiya
- Department of Material Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Ali D. Malay
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department of Material Chemistry, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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5
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Kono N, Nakamura H, Mori M, Yoshida Y, Ohtoshi R, Malay AD, Pedrazzoli Moran DA, Tomita M, Numata K, Arakawa K. Multicomponent nature underlies the extraordinary mechanical properties of spider dragline silk. Proc Natl Acad Sci U S A 2021; 118:e2107065118. [PMID: 34312234 PMCID: PMC8346794 DOI: 10.1073/pnas.2107065118] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Dragline silk of golden orb-weaver spiders (Nephilinae) is noted for its unsurpassed toughness, combining extraordinary extensibility and tensile strength, suggesting industrial application as a sustainable biopolymer material. To pinpoint the molecular composition of dragline silk and the roles of its constituents in achieving its mechanical properties, we report a multiomics approach, combining high-quality genome sequencing and assembly, silk gland transcriptomics, and dragline silk proteomics of four Nephilinae spiders. We observed the consistent presence of the MaSp3B spidroin unique to this subfamily as well as several nonspidroin SpiCE proteins. Artificial synthesis and the combination of these components in vitro showed that the multicomponent nature of dragline silk, including MaSp3B and SpiCE, along with MaSp1 and MaSp2, is essential to realize the mechanical properties of spider dragline silk.
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Affiliation(s)
- Nobuaki Kono
- Institute for Advanced Biosciences, Keio University, 403-1 Nihonkoku, Daihouji, Tsuruoka, Yamagata 997-0017, Japan
- Systems Biology Program, Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-0882, Japan
| | - Hiroyuki Nakamura
- Spiber Inc., 234-1 Mizukami, Kakuganji, Tsuruoka, Yamagata 997-0052, Japan
| | - Masaru Mori
- Institute for Advanced Biosciences, Keio University, 403-1 Nihonkoku, Daihouji, Tsuruoka, Yamagata 997-0017, Japan
- Systems Biology Program, Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-0882, Japan
| | - Yuki Yoshida
- Institute for Advanced Biosciences, Keio University, 403-1 Nihonkoku, Daihouji, Tsuruoka, Yamagata 997-0017, Japan
- Systems Biology Program, Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-0882, Japan
| | - Rintaro Ohtoshi
- Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Ali D Malay
- Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | | | - Masaru Tomita
- Institute for Advanced Biosciences, Keio University, 403-1 Nihonkoku, Daihouji, Tsuruoka, Yamagata 997-0017, Japan
- Systems Biology Program, Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-0882, Japan
| | - Keiji Numata
- Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Depertment of Material Chemistry, Kyoto University, Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kazuharu Arakawa
- Institute for Advanced Biosciences, Keio University, 403-1 Nihonkoku, Daihouji, Tsuruoka, Yamagata 997-0017, Japan;
- Systems Biology Program, Graduate School of Media and Governance, Keio University, 5322 Endo, Fujisawa, Kanagawa 252-0882, Japan
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6
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Verma P, Panda B, Singh KP, Pandit SB. Optimal Protein Sequence Design Mitigates Mechanical Failure in Silk β-Sheet Nanocrystals. ACS Biomater Sci Eng 2021; 7:3156-3165. [PMID: 34151552 DOI: 10.1021/acsbiomaterials.1c00447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The excellent mechanical strength and toughness of spider silk are well characterized experimentally and understood atomistically using computational simulations. However, little attention has been focused on understanding whether the amino acid sequence of β-sheet nanocrystals, which is the key to rendering strength to silk fiber, is optimally chosen to mitigate molecular-scale failure mechanisms. To investigate this, we modeled β-sheet nanocrystals of various representative small/polar/hydrophobic amino acid repeats for determining the sequence motif having superior nanomechanical tensile strength and toughness. The constant velocity pulling of the central β-strand in the nanocrystal, using steered molecular dynamics, showed that homopolymers of small amino acid (alanine/alanine-glycine) sequence motifs, occurring in natural silk fibroin, have better nanomechanical properties than other modeled structures. Further, we analyzed the hydrogen bond (HB) and β-strand pull dynamics of modeled nanocrystals to understand the variation in their rupture mechanisms and explore sequence-dependent mitigating factors contributing to their superior mechanical properties. Surprisingly, the enhanced side-chain interactions in homopoly-polar/hydrophobic amino acid models are unable to augment backbone HB cooperativity to increase mechanical strength. Our analyses suggest that nanocrystals of pristine silk sequences most likely achieve superior mechanical strength by optimizing side-chain interaction, packing, and main-chain HB interactions. Thus, this study suggests that the nanocrystal β-sheet sequence plays a crucial role in determining the nanomechanical properties of silk, and the evolutionary process has optimized it in natural silk. This study provides insight into the molecular design principle of silk with implications in the genetically modified artificial synthesis of silk-like biomaterials.
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Affiliation(s)
- Paras Verma
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, Knowledge City, Manauli PO, SAS Nagar 140306, India
| | - Biswajit Panda
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, Knowledge City, Manauli PO, SAS Nagar 140306, India
| | - Kamal P Singh
- Department of Physical Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, Knowledge City, Manauli PO, SAS Nagar 140306, India
| | - Shashi B Pandit
- Department of Biological Sciences, Indian Institute of Science Education and Research Mohali, Sector 81, Knowledge City, Manauli PO, SAS Nagar 140306, India
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7
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Chen J, Ohta Y, Nakamura H, Masunaga H, Numata K. Aqueous spinning system with a citrate buffer for highly extensible silk fibers. Polym J 2020. [DOI: 10.1038/s41428-020-00419-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Abstract
AbstractStructural proteins, including silk fibroins, play an important role in shaping the skeletons and structures of cells, tissues, and organisms. The amino acid sequences of structural proteins often show characteristic features, such as a repeating tandem motif, that are notably different from those of functional proteins such as enzymes and antibodies. In recent years, materials composed of or containing structural proteins have been studied and developed as biomedical, apparel, and structural materials. This review outlines the definition of structural proteins, methods for characterizing structural proteins as polymeric materials, and potential applications.
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9
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Tsuchiya K, Yilmaz N, Miyamoto T, Masunaga H, Numata K. Zwitterionic Polypeptides: Chemoenzymatic Synthesis and Loosening Function for Cellulose Crystals. Biomacromolecules 2020; 21:1785-1794. [PMID: 31944665 DOI: 10.1021/acs.biomac.9b01700] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A polypeptide with a GlyHisGly repeating sequence containing zwitterionic structures that effectively interact with cellulose was synthesized for dissociation of cellulose crystals. Polypeptide with the GlyHisGly sequence was synthesized by chemoenzymatic polymerization and postfunctionalization of the His residues was performed to afford imidazolium butyrate on the side chains. The resulting zwitterionic polypeptide effectively dissociated bundles of tunicate cellulose nanocrystals, even when the conditions were mild and the concentration of the polypeptide was as low as 1-2 mg mL-1. Polypeptide treatment also affected the morphology of the cell walls in cultured plant cells, and the cellulose microfibril networks and amorphous polysaccharide layer were dissociated according to atomic force microscopy (AFM). The zwitterionic polypeptide treatment did not change the crystal structure of the cellulose nanocrystals. Analysis of the mechanical properties of the cellulose nanocrystals by force curve measurements using AFM revealed that the elastic modulus of the cellulose nanocrystals increased after treatment with the zwitterionic polypeptide, indicating that the amorphous part of the cellulose nanocrystals was removed by interactions with the polypeptide. At a concentration of the polypeptide that enabled the dissociation of the cellulose network, the zwitterionic polypeptide showed negligible cytotoxicity to the plant cells. The mild and noncytotoxic technique for loosening cellulose microfibrils/nanocrystals that was developed in this study has tremendous significance for the modification of cellulose in terms of polymer chemistry, material science, and plant biotechnology.
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Affiliation(s)
- Kousuke Tsuchiya
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Neval Yilmaz
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Takaaki Miyamoto
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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10
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Sogawa H, Korawit T, Masunaga H, Numata K. Silk/Natural Rubber (NR) and 3,4-Dihydroxyphenylalanine (DOPA)-Modified Silk/NR Composites: Synthesis, Secondary Structure, and Mechanical Properties. Molecules 2020; 25:E235. [PMID: 31935972 PMCID: PMC6982767 DOI: 10.3390/molecules25010235] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 12/26/2019] [Accepted: 01/02/2020] [Indexed: 11/16/2022] Open
Abstract
Silk composites with natural rubber (NR) were prepared by mixing degummed silk and NR latex solutions. A significant enhancement of the mechanical properties was confirmed for silk/NR composites compared to a NR-only product, indicating that silk can be applied as an effective reinforcement for rubber materials. Attenuated total reflection Fourier transform infrared (ATR-FTIR) and wide-angle X-ray diffraction (WAXD) analysis revealed that a β-sheet structure was formed in the NR matrix by increasing the silk content above 20 wt%. Then, 3,4-dihydroxyphenylalanine (DOPA)-modified silk was also blended with NR to give a DOPA-silk/NR composite, which showed superior mechanical properties to those of the unmodified silk-based composite. Not only the chemical structure but also the dominant secondary structure of silk in the composite was changed after DOPA modification. It was concluded that both the efficient adhesion property of DOPA residue and the secondary structure change improved the compatibility of silk and NR, resulting in the enhanced mechanical properties of the formed composite. The knowledge obtained herein should contribute to the development of the fabrication of novel silk-based elastic materials.
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Affiliation(s)
- Hiromitsu Sogawa
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1, Saitama, Wako 351-0198, Japan; (H.S.); (T.K.)
| | - Treratanakulwongs Korawit
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1, Saitama, Wako 351-0198, Japan; (H.S.); (T.K.)
| | - Hiroyasu Masunaga
- Materials Structure Group I, Research & Utilization Division, Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan;
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1, Saitama, Wako 351-0198, Japan; (H.S.); (T.K.)
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11
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Pang H, Zhao S, Mo L, Wang Z, Zhang W, Huang A, Zhang S, Li J. Mussel‐inspired bio‐based water‐resistant soy adhesives with low‐cost dopamine analogue‐modified silkworm silk Fiber. J Appl Polym Sci 2019. [DOI: 10.1002/app.48785] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Huiwen Pang
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Shujun Zhao
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Liuting Mo
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Zhong Wang
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Wei Zhang
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Anmin Huang
- Chinese Academy of Forestry Research Institute of Wood Industry Beijing 100091 People's Republic of China
| | - Shifeng Zhang
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
| | - Jianzhang Li
- MOE Key Laboratory of Wooden Material Science and ApplicationBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
- Beijing Key Laboratory of Wood Science and EngineeringBeijing Forestry University, No. 35 Tsinghua East Road, Haidian District Beijing 100083 People's Republic of China
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12
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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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13
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14
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Kono N, Nakamura H, Ohtoshi R, Tomita M, Numata K, Arakawa K. The bagworm genome reveals a unique fibroin gene that provides high tensile strength. Commun Biol 2019; 2:148. [PMID: 31044173 PMCID: PMC6488591 DOI: 10.1038/s42003-019-0412-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 04/03/2019] [Indexed: 12/30/2022] Open
Abstract
Arthropod silk is known as a versatile tool, and its variability makes it an attractive biomaterial. Eumeta variegata is a bagworm moth (Lepidoptera, Psychidae) that uses silk throughout all life stages. Notably, the bagworm-specific uses of silk include larval development in a bag coated with silk and plant materials and the use of silk attachments to hang pupae. An understanding at the molecular level of bagworm silk, which enables such unique purposes, is an opportunity to expand the possibilities for artificial biomaterial design. However, very little is known about the bagworm fibroin gene and the mechanical properties of bagworm silk. Here, we report the bagworm genome, including a silk fibroin gene. The genome is approximately 700 Mbp in size, and the newly found fibroin gene has a unique repetitive motif. Furthermore, a mechanical property test demonstrates a phylogenetic relationship between the unique motif and tensile strength of bagworm silk.
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Affiliation(s)
- Nobuaki Kono
- Institute for Advanced Biosciences, Keio University, Yamagata, Japan
| | | | | | - Masaru Tomita
- Institute for Advanced Biosciences, Keio University, Yamagata, Japan
| | | | - Kazuharu Arakawa
- Institute for Advanced Biosciences, Keio University, Yamagata, Japan
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15
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Johnston ER, Miyagi Y, Chuah JA, Numata K, Serban MA. The interplay between silk fibroin's structure and its adhesive properties. ACS Biomater Sci Eng 2018; 4:2815-2824. [PMID: 30911674 DOI: 10.1021/acsbiomaterials.8b00544] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Bombyx mori-derived silk fibroin (SF) is a well-characterized protein employed in numerous biomedical applications. Structurally, SF consists of a heavy chain (HC) and a light chain (LC), connected via a single disulfide bond. The HC sequence is organized into 12 crystalline domains interspersed with amorphous regions that can transition between random coil/alpha helix and beta-sheet configurations, giving silk its hallmark properties. SF has been reported to have adhesive properties and shows promise for development of medical adhesives; however, the mechanism of these interactions and the interplay between SF's structure and adhesion is not understood. In this context, the effects of physical parameters (i.e., concentration, temperature, pH, ionic strength) and protein structural changes on adhesion were investigated in this study. Our results suggest that amino acid side chains that have functionalities capable of coordinate (dative) bond or hydrogen bond formation (such as those of serine and tyrosine), might be important determinants in SF's adhesion to a given substrate. Additionally, the data suggest that fibroin amino acids involved in beta-sheet formation are also important in the protein's adhesion to substrates.
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Affiliation(s)
- Erik R Johnston
- Materials Science Program, University of Montana, 32 Campus Dr., Missoula, MT 59812, USA
| | - Yu Miyagi
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Jo-Ann Chuah
- 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
| | - Monica A Serban
- Materials Science Program, University of Montana, 32 Campus Dr., Missoula, MT 59812, USA.,Department of Biomedical and Pharmaceutical Sciences, University of Montana, 32 Campus Dr., Missoula, MT 59812, USA
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16
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Yazawa K, Malay AD, Ifuku N, Ishii T, Masunaga H, Hikima T, Numata K. Combination of Amorphous Silk Fiber Spinning and Postspinning Crystallization for Tough Regenerated Silk Fibers. Biomacromolecules 2018; 19:2227-2237. [DOI: 10.1021/acs.biomac.8b00232] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kenjiro Yazawa
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Ali D. Malay
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Nao Ifuku
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Takaoki Ishii
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- Harima Institute SPring-8 Center, Research Infrastructure Group, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Takaaki Hikima
- Harima Institute SPring-8 Center, Research Infrastructure Group, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, 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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17
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Numata K, Ifuku N, Isogai A. Silk Composite with a Fluoropolymer as a Water-Resistant Protein-Based Material. Polymers (Basel) 2018; 10:E459. [PMID: 30966494 PMCID: PMC6415215 DOI: 10.3390/polym10040459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 04/19/2018] [Accepted: 04/19/2018] [Indexed: 01/22/2023] Open
Abstract
Silk-based materials are water-sensitive and show different physical properties at different humidities and under wet/dry conditions. To overcome the water sensitivity of silk-based materials, we developed a silk composite material with a fluoropolymer. Blending and coating the silk protein-based materials, such as films and textiles, with the fluoropolymer enhanced the surface hydrophobicity, water vapor barrier properties, and size stability during shrinkage tests. This material design with a protein biopolymer and a fluoropolymer is expected to broaden the applicability of protein-based materials.
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Affiliation(s)
- Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wakoshi, Saitama 351-0198, Japan.
| | - Nao Ifuku
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wakoshi, Saitama 351-0198, Japan.
| | - Akira Isogai
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
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18
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Asakura T, Tasei Y, Aoki A, Nishimura A. Mixture of Rectangular and Staggered Packing Arrangements of Polyalanine Region in Spider Dragline Silk in Dry and Hydrated States As Revealed by 13C NMR and X-ray Diffraction. Macromolecules 2018. [DOI: 10.1021/acs.macromol.7b02627] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tetsuo Asakura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Yugo Tasei
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Akihiro Aoki
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Akio Nishimura
- Department of Biotechnology, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
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19
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Numata K, Ifuku N, Masunaga H, Hikima T, Sakai T. Silk Resin with Hydrated Dual Chemical-Physical Cross-Links Achieves High Strength and Toughness. Biomacromolecules 2017; 18:1937-1946. [DOI: 10.1021/acs.biomac.7b00376] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keiji Numata
- Enzyme
Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi,
Saitama 351-0198, Japan
| | - Nao Ifuku
- Enzyme
Research Team, Biomass Engineering Research Division, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi,
Saitama 351-0198, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho,
Sayo-gun, Hyogo 679-5198, Japan
| | - Takaaki Hikima
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takamasa Sakai
- Department
of Bioengineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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20
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Lin TY, Masunaga H, Sato R, Malay AD, Toyooka K, Hikima T, Numata K. Liquid Crystalline Granules Align in a Hierarchical Structure To Produce Spider Dragline Microfibrils. Biomacromolecules 2017; 18:1350-1355. [DOI: 10.1021/acs.biomac.7b00086] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ting-Yu Lin
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Ryota Sato
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Ali D. Malay
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kiminori Toyooka
- Mass
Spectrometry and Microscopy Unit, Technology Platform Division, RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa 230-0045 Japan
| | - Takaaki Hikima
- RIKEN SPring-8 Center, 1-1-1
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Keiji Numata
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
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21
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Tsuchiya K, Masunaga H, Numata K. Tensile Reinforcement of Silk Films by the Addition of Telechelic-Type Polyalanine. Biomacromolecules 2017; 18:1002-1009. [DOI: 10.1021/acs.biomac.6b01891] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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
| | - Hiroyasu Masunaga
- Japan Synchrotron
Radiation Research Institute, 1-1-1,
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, 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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22
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Zhang C, Zhang Y, Luo J, Shi J, Shao H, Hu X. Microstructural evolution of regenerated silk fibroin/graphene oxide hybrid fibers under tensile deformation. RSC Adv 2017. [DOI: 10.1039/c6ra22544f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The stress–strain curve and proposed model of microstructural change of silk fibroin/GO hybrid fibers during the stretching deformation.
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Affiliation(s)
- Chao Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Yaopeng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Jie Luo
- School of Material Science and Energy Engineering
- Foshan University
- Foshan 528000
- China
| | - Jingru Shi
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Huili Shao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
| | - Xuechao Hu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- China
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23
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Fang G, Huang Y, Tang Y, Qi Z, Yao J, Shao Z, Chen X. Insights into Silk Formation Process: Correlation of Mechanical Properties and Structural Evolution during Artificial Spinning of Silk Fibers. ACS Biomater Sci Eng 2016; 2:1992-2000. [DOI: 10.1021/acsbiomaterials.6b00392] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | | | - Yuzhao Tang
- National
Centre for Protein Science−Shanghai, Institute of Biochemistry
and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
| | - Zeming Qi
- National
Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, People’s Republic of China
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24
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Wong YM, Masunaga H, Chuah JA, Sudesh K, Numata K. Enzyme-Mimic Peptide Assembly To Achieve Amidolytic Activity. Biomacromolecules 2016; 17:3375-3385. [PMID: 27642764 DOI: 10.1021/acs.biomac.6b01169] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Amyloid fibers are classified as a new generation of tunable bionanomaterials that exhibit new functions related to their distinctive characteristics, such as their universality, tunability, and stiffness. Here, we introduce the catalytic residues of serine protease into a peptide catalyst (PC) via an enzyme-mimic approach. The rational design of a repeating pattern of polar and nonpolar amino acids favors the conversion of the peptides into amyloid-like fibrils via self-assembly. Distinct fibrous morphologies have been observed at different pH values and temperatures, which indicates that different fibril packing schemes can be designed; hence, fibrillar peptides can be used to generate efficient artificial catalysts for amidolytic activities at mild pH values. The results of atomic force microscopy, Raman spectroscopy, and wide-angle X-ray scattering analyses are used to discuss and compare the fibril structure of a fibrillar PC with its amidolytic activity. The pH of the fibrillation reaction crucially affects the pKa of the side chains of the catalytic triads and is important for stable fibril formation. Temperature is another important parameter that controls the self-assembly of peptides into highly stacked and laminated morphologies. The morphology and stability of fibrils are crucial and represent important factors for demonstrating the capability of the peptides to exert amidolytic activity. The observed amidolytic activity of PC4, one of the PCs, was validated using an inhibition assay, which revealed that PC4 can perform enzyme-like amidolytic catalysis. These results provide insights into the potential use of designed peptides in the generation of efficient artificial enzymes.
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Affiliation(s)
- Yoke-Ming Wong
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science , 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan.,Ecobiomaterial Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia , 11800, Minden, Penang, Malaysia
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Jo-Ann Chuah
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science , 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kumar Sudesh
- Ecobiomaterial Research Laboratory, School of Biological Sciences, Universiti Sains Malaysia , 11800, Minden, Penang, Malaysia
| | - Keiji Numata
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science , 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan
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25
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Malay AD, Sato R, Yazawa K, Watanabe H, Ifuku N, Masunaga H, Hikima T, Guan J, Mandal BB, Damrongsakkul S, Numata K. Relationships between physical properties and sequence in silkworm silks. Sci Rep 2016; 6:27573. [PMID: 27279149 PMCID: PMC4899792 DOI: 10.1038/srep27573] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 05/23/2016] [Indexed: 12/22/2022] Open
Abstract
Silk has attracted widespread attention due to its superlative material properties and promising applications. However, the determinants behind the variations in material properties among different types of silk are not well understood. We analysed the physical properties of silk samples from a variety of silkmoth cocoons, including domesticated Bombyx mori varieties and several species from Saturniidae. Tensile deformation tests, thermal analyses, and investigations on crystalline structure and orientation of the fibres were performed. The results showed that saturniid silks produce more highly-defined structural transitions compared to B. mori, as seen in the yielding and strain hardening events during tensile deformation and in the changes observed during thermal analyses. These observations were analysed in terms of the constituent fibroin sequences, which in B. mori are predicted to produce heterogeneous structures, whereas the strictly modular repeats of the saturniid sequences are hypothesized to produce structures that respond in a concerted manner. Within saturniid fibroins, thermal stability was found to correlate with the abundance of poly-alanine residues, whereas differences in fibre extensibility can be related to varying ratios of GGX motifs versus bulky hydrophobic residues in the amorphous phase.
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Affiliation(s)
- Ali D. Malay
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Ryota Sato
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kenjiro Yazawa
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hiroe Watanabe
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Nao Ifuku
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron Radiation Research Institute, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takaaki Hikima
- RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Juan Guan
- School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Beijing, 100191, China
| | - Biman B. Mandal
- Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG), Guwahati, 781039, India
| | - Siriporn Damrongsakkul
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Keiji Numata
- Enzyme Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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26
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Yazawa K, Ishida K, Masunaga H, Hikima T, Numata K. Influence of Water Content on the β-Sheet Formation, Thermal Stability, Water Removal, and Mechanical Properties of Silk Materials. Biomacromolecules 2016; 17:1057-66. [DOI: 10.1021/acs.biomac.5b01685] [Citation(s) in RCA: 131] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kenjiro Yazawa
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Kana Ishida
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
- Spiber Inc., 234-1, Mizukami, Kakuganji, Tsuruoka, Yamagata 997-0052, Japan
| | - Hiroyasu Masunaga
- Japan Synchrotron
Radiation Research Institute, 1-1-1,
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- RIKEN SPring-8
Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Takaaki Hikima
- RIKEN SPring-8
Center, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Keiji Numata
- Enzyme
Research Team, RIKEN Center for Sustainable Resource Science, 2-1
Hirosawa, Wako-shi, Saitama 351-0198, Japan
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27
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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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28
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Numata K, Sato R, Yazawa K, Hikima T, Masunaga H. Crystal structure and physical properties of Antheraea yamamai silk fibers: Long poly(alanine) sequences are partially in the crystalline region. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.09.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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