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Perea Abarca, Gracia Belén and Solanas, Concepción and Plaza Baonza, Gustavo Ramón and Guinea Tortuero, Gustavo V. and Jorge, Inmaculada and Vázquez Minguela, Jesús and Pérez Mateos, Jorge and Marí Buyé, Nuria and Elices Calafat, Manuel and Pérez Rigueiro, José (2015). Unexpected behavior of irradiated spider silk links conformational freedom to mechanical performance. "Soft Matter", v. 11 (n. 24); pp. 4868-4878. ISSN 1744-683X. https://doi.org/10.1039/c5sm00395d.
Title: | Unexpected behavior of irradiated spider silk links conformational freedom to mechanical performance |
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Author/s: |
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Item Type: | Article |
Título de Revista/Publicación: | Soft Matter |
Date: | May 2015 |
ISSN: | 1744-683X |
Volume: | 11 |
Subjects: | |
Faculty: | Centro de Tecnología Biomédica (CTB) (UPM) |
Department: | Ciencia de los Materiales |
Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
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Silk fibers from Argiope trifasciata and Nephila inaurata orb-web weaving spiders were UV irradiated to modify the molecular weight of the constituent proteins. Fibers were characterized either as forcibly silked or after being subjected to maximum supercontraction. The effect of irradiation on supercontraction was also studied, both in terms of the percentage of supercontraction and the tensile properties exhibited by irradiated and subsequently supercontracted fibers. The effects of UV exposure at the molecular level were assessed by polyacrylamide gel electrophoresis and mass spectrometry. It is shown that UV-irradiated fibers show a steady decrease in their main tensile parameters, most notably, tensile strength and strain. The combination of the mechanical and biochemical data suggests that the restricted conformational freedom of the proteins after UV irradiation is critical in the reduction of these properties. Consequently, an adequate topological organization of the protein chains emerges as a critical design principle in the performance of spider silk.
Item ID: | 41139 |
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DC Identifier: | https://oa.upm.es/41139/ |
OAI Identifier: | oai:oa.upm.es:41139 |
DOI: | 10.1039/c5sm00395d |
Official URL: | http://pubs.rsc.org/en/Content/ArticleLanding/2015... |
Deposited by: | Memoria Investigacion |
Deposited on: | 25 Apr 2017 16:44 |
Last Modified: | 30 Nov 2022 09:00 |