Small angle neutron scattering of native and reconstituted silk fibroin

Imke Greving; Cedric Dicko; Ann Terry; Phil Callow; Fritz Vollrath

doi:10.1039/C0SM00108B

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Soft Matter

Issue 18, 2010

Where physics meets chemistry meets biology for fundamental soft matter research.

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Small angle neutron scattering of native and reconstituted silk fibroin

Imke Greving,^a Cedric Dicko,*^a Ann Terry,^a^b Phil Callow^c and Fritz Vollrath^a

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University of Oxford, Department of Zoology, Tinbergen building, Oxford, UK
E-mail: cedric.dicko@zoo.ox.ac.uk ;
Tel: +44(0)18650271216

ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, UK

Institut Laue Langevin, BP 156, 6 rue Jules Horowitz, Grenoble, Cedex 9, France

Soft Matter, 2010,6, 4389-4395

DOI: 10.1039/C0SM00108B
Received 15 Mar 2010, Accepted 24 Jun 2010
First published online 04 Aug 2010

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Silks spun by spiders and insects are independently evolved proteinaceous biomaterials with fascinating physical properties attracting scientists from a wide range of disciplines using a wide range of analytical tools. Here we demonstrate the suitability of neutron small angle scattering (SANS) to investigate the morphology and structure of native silk fibroin at near in vivo conditions. Comparing native and reconstituted silk we observed significant differences in sizes, molecular weights, refolding and interactions. These observations question the validity of a presently widespread approach in silk analysis i.e. studying reconstituted silk with the goal to gain important insights into the mechanisms involved in the formation (storage and spinning) of native silks.

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Cedric Dicko
Ann Terry
Phil Callow
Fritz Vollrath

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