Identification and dynamics of polyglycine II nanocrystals in Argiope trifasciata flagelliform silk

Perea Abarca, Gracia Belén; Riekel, Christian; Guinea Tortuero, Gustavo V.; Madurga, Rodrigo; Daza Garcia, Rafael; Burghammer, Manfred; Hayashi, C.; Elices Calafat, Manuel; Plaza Baonza, Gustavo Ramón y Pérez Rigueiro, José (2013). Identification and dynamics of polyglycine II nanocrystals in Argiope trifasciata flagelliform silk. "Scientific Reports", v. 3 ; pp. 1-6. ISSN 2045-2322. https://doi.org/10.1038/srep03061.

Descripción

Título: Identification and dynamics of polyglycine II nanocrystals in Argiope trifasciata flagelliform silk
Autor/es:
  • Perea Abarca, Gracia Belén
  • Riekel, Christian
  • Guinea Tortuero, Gustavo V.
  • Madurga, Rodrigo
  • Daza Garcia, Rafael
  • Burghammer, Manfred
  • Hayashi, C.
  • Elices Calafat, Manuel
  • Plaza Baonza, Gustavo Ramón
  • Pérez Rigueiro, José
Tipo de Documento: Artículo
Título de Revista/Publicación: Scientific Reports
Fecha: Octubre 2013
Volumen: 3
Materias:
Palabras Clave Informales: Nanoscale biophysics, structural properties, bioinspired materials, polymers At a glance
Escuela: Centro de Tecnología Biomédica (CTB) (UPM)
Departamento: Ciencia de los Materiales
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Spider silks combine a significant number of desirable characteristics in one material, including large tensile strength and strain at breaking, biocompatibility, and the possibility of tailoring their properties. Major ampullate gland silk (MAS) is the most studied silk and their properties are explained by a double lattice of hydrogen bonds and elastomeric protein chains linked to polyalanine β-nanocrystals. However, many basic details regarding the relationship between composition, microstructure and properties in silks are still lacking. Here we show that this relationship can be traced in flagelliform silk (Flag) spun by Argiope trifasciata spiders after identifying a phase consisting of polyglycine II nanocrystals. The presence of this phase is consistent with the dominant presence of the –GGX– and –GPG– motifs in its sequence. In contrast to the passive role assigned to polyalanine nanocrystals in MAS, polyglycine II nanocrystals can undergo growing/collapse processes that contribute to increase toughness and justify the ability of Flag to supercontract.

Más información

ID de Registro: 29068
Identificador DC: http://oa.upm.es/29068/
Identificador OAI: oai:oa.upm.es:29068
Identificador DOI: 10.1038/srep03061
URL Oficial: http://www.nature.com/srep/2013/131028/srep03061/full/srep03061.html
Depositado por: Memoria Investigacion
Depositado el: 15 Abr 2015 16:39
Ultima Modificación: 15 Abr 2015 16:39
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