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Letter

Nature 437, 999-1002 (13 October 2005) | doi:10.1038/nature04085; Received 24 January 2005; Accepted 12 July 2005

Open Innovation Challenges

Synthesis and properties of crosslinked recombinant pro-resilin

Christopher M. Elvin1, Andrew G. Carr1, Mickey G. Huson2, Jane M. Maxwell2, Roger D. Pearson1, Tony Vuocolo1, Nancy E. Liyou1, Darren C. C. Wong1,3, David J. Merritt3 & Nicholas E. Dixon4

  1. CSIRO Livestock Industries, Queensland Bioscience Precinct, St Lucia 4072, Australia
  2. CSIRO Textile and Fibre Technology, PO Box 21, Geelong 3216, Australia
  3. School of Integrative Biology, University of Queensland, St Lucia 4072, Australia
  4. Research School of Chemistry, Australian National University, Canberra 0200, Australia

Correspondence to: Christopher M. Elvin1 Correspondence and requests for materials should be addressed to C.M.E. (Email: chris.elvin@csiro.au).

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Resilin is a member of a family of elastic proteins that includes elastin, as well as gluten, gliadin, abductin and spider silks. Resilin is found in specialized regions of the cuticle of most insects, providing low stiffness, high strain and efficient energy storage1, 2; it is best known for its roles in insect flight3, 4 and the remarkable jumping ability of fleas5, 6 and spittle bugs7. Previously, the Drosophila melanogaster CG15920 gene was tentatively identified as one encoding a resilin-like protein8, 9 (pro-resilin). Here we report the cloning and expression of the first exon of the Drosophila CG15920 gene as a soluble protein in Escherichia coli. We show that this recombinant protein can be cast into a rubber-like biomaterial by rapid photochemical crosslinking. This observation validates the role of the putative elastic repeat motif in resilin function. The resilience (recovery after deformation) of crosslinked recombinant resilin was found to exceed that of unfilled synthetic polybutadiene, a high resilience rubber. We believe that our work will greatly facilitate structural investigations into the functional properties of resilin and shed light on more general aspects of the structure of elastomeric proteins. In addition, the ability to rapidly cast samples of this biomaterial may enable its use in situ for both industrial and biomedical applications.

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