DNA-based patterning of tethered membrane patches.

Area of Science:

• Biophysics
• Materials Science
• Nanotechnology

Background:

• Solid-supported lipid bilayers are crucial for mimicking cellular membranes.
• Surface interactions can negatively impact membrane protein function and fusion.
• Existing tethered bilayer methods lack precise spatial control.

Purpose of the Study:

• To develop a method for spatially patterning tethered lipid bilayer patches.
• To enable greater versatility and control over membrane patch placement.
• To facilitate advanced applications in protein binding assays and sensor development.

Main Methods:

• Utilized DNA lipids to create a spatial separation between lipid bilayers and solid supports.
• Employed microarray printing to pattern surface-reactive DNA sequences on glass slides.
• Formed tethered membrane patches selectively on printed DNA using DNA-functionalized giant unilamellar vesicles (GUVs).

Main Results:

• Successfully created spatially distinct tethered membrane patches on glass slides.
• Demonstrated selective formation of DNA-GUV patches on patterned DNA.
• Integrated patterned bilayers with microfluidic flow cells for compositional control.

Conclusions:

• The developed microarray printing method offers precise spatial control over tethered membrane patches.
• This technique enhances the utility of lipid bilayers for surface-sensitive studies.
• Paves the way for high-throughput screening and advanced biosensor applications.