DNA intercalation in neutral multilamellar membranes.
We report a small angle X-ray scattering study of the DNA/neutral lipid/water system showing that it is possible to confine DNA into a neutral multilamellar phase at high lipid-to-DNA weight ratio, despite the lack of electrostatic interactions in this system. This phase is characterized by a 2D ordering of the DNA molecules intercalated between the neutral bilayers of a 3D smectic phase as shown from the presence of a DNA-DNA correlation peak and the 1D electron density profile of the multilamellar phase. We further demonstrate that it is possible to disperse this phase as small multilamellar vesicles encapsulating high amounts of DNA.
Pott
Tanja
T
Centre de Recherche Paul Pascal - CNRS, Av. A. Schweitzer, 33600 Pessac, France. tanja.pott@ensc-rennes.fr
Roux
Didier
D
D004247:DNA / Q000737:chemistry* / Q000378:metabolism*; D007364:Intercalating Agents / Q000737:chemistry*; D008051:Lipid Bilayers / Q000737:chemistry* / Q000378:metabolism*; D008563:Membrane Lipids / Q000737:chemistry*; D009997:Osmotic Pressure; D010713:Phosphatidylcholines / Q000737:chemistry; D013025:Glycine max; D055672:Static Electricity; D014961:X-Ray Diffraction
D007364:Intercalating Agents; D008051:Lipid Bilayers; D008563:Membrane Lipids; D010713:Phosphatidylcholines; D004247:DNA