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Updated: May 6, 2026
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A Technique for Stabilizing Membrane Proteins in Nanodiscs
Published on: April 30, 2026
22
DNA-Lipid Nanodiscs with a Polyethylene Glycol Interface
Soumya Chandrasekhar1,2, Christopher Maffeo3,4, Sanjai Karanth1
1Department of Physics, Kent State University, Kent, Ohio 44242, United States.
Journal of the American Chemical Society
|May 4, 2026
Summary
Researchers developed novel DNA-lipid nanodiscs (DLNs) for studying membrane proteins. These nanodiscs use DNA scaffolds and PEG linkers to create stable lipid bilayers, enabling protein incorporation and analysis.
Area of Science:
- Biochemistry
- Nanotechnology
- Molecular Biology
Background:
- Nanodiscs are essential tools for membrane protein research.
- Existing nanodiscs face challenges in stability and precise structural control.
Purpose of the Study:
- To introduce DNA-lipid nanodiscs (DLNs) as a new platform for membrane studies.
- To demonstrate the ability of DLNs to incorporate membrane proteins.
Main Methods:
- Synthesizing PEG-modified oligonucleotides into functionalized DNA minicircles.
- Forming lipid bilayers within the DNA scaffold via detergent removal.
- Incorporating a biotinylated transmembrane protein domain into DLNs.
- Utilizing streptavidin-conjugated quantum dots for detection.
Main Results:
- Successfully created DNA-lipid nanodiscs with a defined diameter.
- Simulations confirmed PEG's role in mediating hydrophobic mismatch.
- Demonstrated successful incorporation of a membrane protein domain into DLNs.
- Verified protein incorporation using quantum dot labeling.
Conclusions:
- DNA-lipid nanodiscs offer a precise and modular scaffold for membrane protein research.
- DLNs provide a versatile tool for studying lipid bilayers and membrane protein function.
- This technology has broad applicability in nanobiotechnology and membrane biophysics.
