Structure, orientation and stability of lysozyme confined in layered materials

Sébastien Balme, Régis Guégan, Jean Marc Janot, Maguy Jaber, Mathilde Lepoitevin, Philippe Dejardin, Xavier Bourrat, Mikael Motelica-Heino

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Abstract

The confinement of lysozyme in 3 layered materials based on montmorillonite and lamellar double hydroxides exhibiting different surface charges was studied. The protein structure and orientation in these materials were determined by X-ray diffraction, time resolved fluorescence and fluorescence anisotropy. For montmorillonite exchanged with sodium and modified with a non-ionic surfactant (tri-ethylene glycol mono n-decyl ether), the lysozyme was found to be located in the interlayer space with the "end-on" and "side-on" orientations, respectively. Conversely, no lysozyme intercalation was observed with a lamellar double hydroxide modified with an anionic surfactant (sodium octylsulfate), since the protein was adsorbed on the surface of the particles. Fourier transformed infrared spectroscopy analysis shows that lysozyme confinement in the interlayer space preserves its structure after dehydration, whereas some structural changes were observed for lysozyme adsorbed on the particle surface.

Original languageEnglish
Pages (from-to)3188-3196
Number of pages9
JournalSoft Matter
Volume9
Issue number11
DOIs
Publication statusPublished - 2013 Mar 21

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Balme, S., Guégan, R., Janot, J. M., Jaber, M., Lepoitevin, M., Dejardin, P., Bourrat, X., & Motelica-Heino, M. (2013). Structure, orientation and stability of lysozyme confined in layered materials. Soft Matter, 9(11), 3188-3196. https://doi.org/10.1039/c3sm27880h