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Han L, Zhu S, Ma H, Liu P, Shen H, Yang L, Huang W, Li Y. Assessing the Sequence Specificity in Thermal and Polarized Optical Order of Multiple Sequence-Determined Liquid Crystal Polymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01585] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Li Han
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Siqi Zhu
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Hongwei Ma
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Pibo Liu
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Heyu Shen
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Lincan Yang
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Wei Huang
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Yang Li
- State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering, Liaoning key Laboratory of Polymer Science and Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China
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Saito N, Kanie K, Matsubara M, Muramatsu A, Yamaguchi M. Dynamic and Reversible Polymorphism of Self-Assembled Lyotropic Liquid Crystalline Systems Derived from Cyclic Bis(ethynylhelicene) Oligomers. J Am Chem Soc 2015; 137:6594-601. [DOI: 10.1021/jacs.5b02003] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nozomi Saito
- Frontier
Research Institute for Interdisciplinary Sciences, Tohoku University , 6-3 Aoba, Sendai 980-8578, Japan
- Department
of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
| | - Kiyoshi Kanie
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1,
Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Masaki Matsubara
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1,
Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Atsushi Muramatsu
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1,
Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Masahiko Yamaguchi
- Department
of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan
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Rabotyagova OS, Cebe P, Kaplan DL. Role of polyalanine domains in beta-sheet formation in spider silk block copolymers. Macromol Biosci 2010; 10:49-59. [PMID: 19890885 DOI: 10.1002/mabi.200900203] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Genetically engineered spider silk-like block copolymers were studied to determine the influence of polyalanine domain size on secondary structure. The role of polyalanine block distribution on beta-sheet formation was explored using FT-IR and WAXS. The number of polyalanine blocks had a direct effect on the formation of crystalline beta-sheets, reflected in the change in crystallinity index as the blocks of polyalanines increased. WAXS analysis confirmed the crystalline nature of the sample with the largest number of polyalanine blocks. This approach provides a platform for further exploration of the role of specific amino acid chemistries in regulating the assembly of beta-sheet secondary structures, leading to options to regulate material properties through manipulation of this key component in spider silks.
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Affiliation(s)
- Olena S Rabotyagova
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
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Huang J, Cebe P, Kaplan DL. Hierarchical Assembly of Collagen-Like Peptidesin vitroProvides Structural Causes of Osteogenesis Imperfecta. Macromol Rapid Commun 2009; 30:336-44. [DOI: 10.1002/marc.200800591] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 11/30/2008] [Accepted: 12/01/2008] [Indexed: 11/08/2022]
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Rabotyagova OS, Cebe P, Kaplan DL. Collagen Structural Hierarchy and Susceptibility to Degradation by Ultraviolet Radiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008; 28:1420-1429. [PMID: 22199459 PMCID: PMC3244270 DOI: 10.1016/j.msec.2008.03.012] [Citation(s) in RCA: 120] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Collagen type I is the most abundant extracellular matrix protein in the human body, providing the basis for tissue structure and directing cellular functions. Collagen has complex structural hierarchy, organized at different length scales, including the characteristic triple helical feature. In the present study, the relationship between collagen structure (native vs. denatured) and sensitivity to UV radiation was assessed, with a focus on changes in primary structure, changes in conformation, microstructure and material properties. A brief review of free radical reactions involved in collagen degradation is also provided as a mechanistic basis for the changes observed in the study. Structural and functional changes in the collagens were related to the initial conformation (native vs. denatured) and the energy of irradiation. These changes were tracked using SDS-PAGE to assess molecular weight, Fourier transform infrared (FTIR) spectroscopy to study changes in the secondary structure, and atomic force microscopy (AFM) to characterize changes in mechanical properties. The results correlate differences in sensitivity to irradiation with initial collagen structural state: collagen in native conformation vs. heat-treated (denatured) collagen. Changes in collagen were found at all levels of the hierarchical structural organization. In general, the native collagen triple helix is most sensitive to UV-254nm radiation. The triple helix delays single chain degradation. The loss of the triple helix in collagen is accompanied by hydrogen abstraction through free radical mechanisms. The results received suggest that the effects of electromagnetic radiation on biologically relevant extracellular matrices (collagen in the present study) are important to assess in the context of the state of collagen structure. The results have implications in tissue remodeling, wound repair and disease progression.
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Affiliation(s)
- Olena S. Rabotyagova
- Departments of Chemistry, Biomedical Engineering and Physics, Tufts University, Medford, Massachusetts 02155 USA
| | - Peggy Cebe
- Departments of Chemistry, Biomedical Engineering and Physics, Tufts University, Medford, Massachusetts 02155 USA
| | - David L. Kaplan
- Departments of Chemistry, Biomedical Engineering and Physics, Tufts University, Medford, Massachusetts 02155 USA
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Xu P, Huang J, Cebe P, Kaplan DL. Osteogenesis Imperfecta Collagen-Like Peptides: Self-Assembly and Mineralization on Surfaces. Biomacromolecules 2008; 9:1551-7. [DOI: 10.1021/bm701365x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peng Xu
- Departments of Chemical and Biological Engineering and Biomedical Engineering, and Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155
| | - Jia Huang
- Departments of Chemical and Biological Engineering and Biomedical Engineering, and Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155
| | - Peggy Cebe
- Departments of Chemical and Biological Engineering and Biomedical Engineering, and Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155
| | - David L. Kaplan
- Departments of Chemical and Biological Engineering and Biomedical Engineering, and Department of Physics and Astronomy, Tufts University, Medford, Massachusetts 02155
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