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Updated: Jul 10, 2026
08:49
Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
Spectrin maintains the lateral order in phosphatidylserine monolayers
J M Thompson1, R E Ellis, E M Green
1School of Physics, University of Exeter, Stocker Road, Exeter, United Kingdom.
Chemistry and Physics of Lipids
|November 13, 2007
Summary
Spectrin protein helps maintain the structural order of lipid monolayers. This skeletal protein interacts directly with phosphatidylserine, sustaining two-dimensional lipid order.
Area of Science:
- Biophysics
- Materials Science
Background:
- Lipid monolayers exhibit complex structural organization.
- Skeletal proteins play roles in cellular structure and function.
Purpose of the Study:
- To investigate the effect of spectrin on the lateral order of dipalmitoyl phosphatidylserine monolayers.
- To explore the potential interaction between spectrin and lipid domains.
Main Methods:
- Grazing incidence X-ray diffraction was used to analyze lipid monolayer structure.
- Experiments were conducted on dipalmitoyl phosphatidylserine monolayers spread on aqueous surfaces.
Main Results:
- Lipid monolayers showed two-dimensional hexagonal packing without spectrin.
- Spectrin addition preserved the structural parameters of the lipid monolayers at high surface pressures.
- The d-spacing decreased and order increased with surface pressure in the absence of spectrin.
Conclusions:
- Spectrin directly interacts with phosphatidylserine species.
- Spectrin can sustain the two-dimensional order in lipid domains.
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