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Constructing Thioether/Vinyl Sulfide-tethered Helical Peptides Via Photo-induced Thiol-ene/yne Hydrothiolation
Published on: August 1, 2018
Tether-supported biomembranes with α-helical peptide-based anchoring constructs
Lina Zhong1, Raymond Tu, M Lane Gilchrist
1Department of Chemical Engineering, The Grove School of Engineering, The City College of New York, 140th Street at Convent Avenue, New York, New York 10031, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|November 30, 2012
Summary
Researchers developed peptide anchors to create supported lipid bilayers on surfaces. These peptide anchors enhance biomembrane stability and mobility, paving the way for new ligand display platforms.
Area of Science:
- Biomaterials Science
- Membrane Biophysics
- Surface Chemistry
Background:
- Preserving native lipid environments is crucial for membrane protein functionality in biomaterials.
- Supported biomembranes require robust anchoring strategies for enhanced viability and novel ligand display interfaces.
Purpose of the Study:
- To design and synthesize peptide-based anchoring molecules for tethering lipid bilayers to surfaces.
- To create a polymer-cushioned lipid microenvironment with high lateral mobility on microsphere surfaces.
- To develop a new platform for ligand display applications using supported biomembranes.
Main Methods:
- Solid-phase peptide synthesis of K(3)A(4)L(2)A(7)L(2)A(3)K(2)-FITC peptide anchors.
- Incorporation of peptides into liposomes and subsequent fusion with NHS-activated silica microspheres.
- Characterization using circular dichroism spectroscopy, confocal microscopy, and fluorescence recovery after photobleaching (FRAP).
Main Results:
- Peptides successfully formed alpha-helical domains within liposomes.
- Confocal microscopy confirmed homogeneous supported biomembranes on silica microspheres.
- FRAP analysis showed a 28.9% increase in peptide diffusivity with a PEG polymer cushion.
Conclusions:
- Rationally designed peptides effectively anchor lipid bilayers to surfaces, creating stable and mobile biomembrane systems.
- The polymer-cushioned lipid microenvironment enhances lateral mobility, crucial for biomaterial applications.
- This approach offers a versatile platform for developing advanced biosensors and ligand display systems.
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