EPSP Team's publications
Probing local lipid dynamics at the picosecond timescale with the Bicout model - Archive ouverte HAL
Poster De Conférence Année : 2021

Probing local lipid dynamics at the picosecond timescale with the Bicout model

Résumé

Lipid membranes are at the basis of cell organization. Understanding their functionality, in the light of their structure and dynamics is then crucial. Using quasi-elastic neutron scattering (QENS), it is possi- ble to access picosecond timescale dynamics. However, since years, only few models addressed the question of local lipid dynamics, whereas the increase of the neutron flux and data quality called for novel general models. Based on a timescale separation approach from Wanderlingh et al (2014), the Bicout model re-introduces the main local motions presented in the 80s by Pfeiffer et al, but writes them all in a unique framework that requires few hypotheses. Among others are described motions of the whole lipid, like its rotation, diffusion within the membrane, or in-out-of-the- plane dynamics. In addition, it makes a distinction between the head and the tail dynamics. Here, we would like to present a quantitative and complete study of local lipid dynamics on standard DMPC mem- branes. We probed the effects of known features such as the main phase transition, membrane geometry, or direction of motions, and proved the application of this new model.

Fichier non déposé

Dates et versions

hal-04584683 , version 1 (23-05-2024)

Identifiants

  • HAL Id : hal-04584683 , version 1

Citer

Aline Cisse, Tatsuhito Matsuo, Dominique J. Bicout, Judith Peters. Probing local lipid dynamics at the picosecond timescale with the Bicout model. 13th EBSA European Biophysics Congress, Jul 2021, Vienne (Autriche), Austria. European Biophysics Journal, 50 (Suppl 1), pp.102, 2021. ⟨hal-04584683⟩
268 Consultations
0 Téléchargements

Partager

  • More