Orientation of lipids in solid supported lipid bilayers studied by polarized ATR-FTIR spectroscopy

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Biomedical Spectroscopy and Imaging. 2018, 7(1-2), pp. 17-24. ISSN 2212-8794. eISSN 2212-8808. Available under: doi: 10.3233/BSI-180173
Zusammenfassung

Solid supported lipid bilayers (SSLB) play an important role as biomimetic membranes to study protein-membrane interactions. We investigated the orientation of lipids in SSLBs at different temperatures and over time. Especially the stability of the lipid bilayer and structural changes upon lipid phase transition were analyzed by polarized ATR-FTIR spectroscopy and with SSLBs of different lipid compositions. The integrity of a lipid bilayer consisting of POPC or a 1:1 mixture of POPC and POPG is conserved over a wide temperature range and over several hours. Furthermore, we were able to monitor changes in the orientation of the lipid alkyl chains upon lipid phase transition for DMPC and DSPC. This study shows that the combination of solid supported lipid bilayers and polarized ATR-FTIR spectroscopy is very powerful to characterize lipid membranes under different environmental conditions. The sensitivity of this technique will be exploited in future studies to analyze the effect of protein-membrane interaction on lipid orientation

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540 Chemie
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Solid supported lipid bilayers, polarized ATR-FTIR, lipid phase transition, membrane integrity, molecular orientation
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ISO 690SCHEIBE, Christian, Karin HAUSER, 2018. Orientation of lipids in solid supported lipid bilayers studied by polarized ATR-FTIR spectroscopy. In: Biomedical Spectroscopy and Imaging. 2018, 7(1-2), pp. 17-24. ISSN 2212-8794. eISSN 2212-8808. Available under: doi: 10.3233/BSI-180173
BibTex
@article{Scheibe2018-05-07Orien-44405,
  year={2018},
  doi={10.3233/BSI-180173},
  title={Orientation of lipids in solid supported lipid bilayers studied by polarized ATR-FTIR spectroscopy},
  number={1-2},
  volume={7},
  issn={2212-8794},
  journal={Biomedical Spectroscopy and Imaging},
  pages={17--24},
  author={Scheibe, Christian and Hauser, Karin}
}
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