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  Cooperative behavior of a sacrificial bond network and elastic framework in providing self-healing capacity in mussel byssal threads

Reinecke, A., Bertinetti, L., Fratzl, P., & Harrington, M. J. (2016). Cooperative behavior of a sacrificial bond network and elastic framework in providing self-healing capacity in mussel byssal threads. Journal of Structural Biology, 196(3), 329-339. doi:10.1016/j.jsb.2016.07.020.

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 Creators:
Reinecke, Antje1, Author              
Bertinetti, Luca2, Author              
Fratzl, Peter3, Author              
Harrington, Matthew J.1, Author              
Affiliations:
1Matthew Harrington, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863292              
2Luca Bertinetti (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2231637              
3Peter Fratzl, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863294              

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Free keywords: Beta sheet; Self-healing; collagen; X-ray diffraction; Mussel byssal thread
 Abstract: The dissipative and self-healing properties of mussel byssal threads are critical for their function as anchoring fibers in wave-battered habitats and central to their emergence as an exciting model system for bio-inspired polymers. Much is now understood about the structure-function relationships defining this remarkable proteinaceous bio-fiber; however, the molecular mechanisms underlying the distinctive tough, viscoelastic and self-healing behavior are still unclear. Here, we investigate elastic and dissipative contributions from the primary load-bearing proteins in the distal region of byssal threads (the preCols) using X-ray diffraction (XRD) combined with in situ tensile testing. Specifically, we identified cross β-sheet structure in the preCol flanking domains that functions as an elastic framework, providing hidden length. Dissipative behavior was associated with a strain-rate dependent phase transition of a sacrificial network stabilized by strong, reversible cross-links. Based on these findings, we posit a new model for byssal thread deformation and self-healing.

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 Dates: 2016-07-292016
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jsb.2016.07.020
BibTex Citekey: Reinecke2016
PMID: 0512
 Degree: -

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Title: Journal of Structural Biology
  Abbreviation : J. Struct. Biol.
Source Genre: Journal
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Publ. Info: Orlando, Fla. : Academic Press
Pages: - Volume / Issue: 196 (3) Sequence Number: - Start / End Page: 329 - 339 Identifier: ISSN: 1047-8477