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Updated: May 2, 2026
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Peptide-based Identification of Functional Motifs and their Binding Partners
Published on: July 1, 2013
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Helical peptide arrays for lead identification and interaction site mapping
Johannes P M Langedijk1, Maria J Zekveld, Mariska Ruiter
1Pepscan Therapeutics, 8243 RC Lelystad, The Netherlands. hans.langedijk@crucell.com
Analytical Biochemistry
|June 29, 2011
Summary
This study introduces a novel homodimeric helical coiled-coil system for presenting antigens, overcoming limitations of linear peptides. This method enables high-resolution epitope mapping for antibody discovery and analysis of protein interactions.
Area of Science:
- Biochemistry
- Structural Biology
- Immunology
Background:
- Linear and cyclic peptides inadequately represent complex antigenic sites.
- Mapping antibody-ligand binding requires broader sampling of three-dimensional space.
- Hydrogel-based parallel synthesis limits peptide size, hindering the study of higher-order structures.
Purpose of the Study:
- To develop a robust homodimeric helical system for antigen presentation.
- To enable high-resolution epitope mapping of antibody binding sites.
- To facilitate lead identification and analysis of amino acid contributions in coiled-coil systems.
Main Methods:
- Synthesis and characterization of helical coiled-coil peptides in a heterodimeric system.
- Grafting epitopes onto homodimeric coiled-coil libraries.
- Utilizing dimeric and trimeric coiled-coil libraries for epitope mapping.
Main Results:
- Demonstrated predictable interactions of helical coiled-coil peptides within a hydrogel.
- Successfully synthesized libraries of homodimeric coiled coils with grafted epitopes.
- Achieved high-resolution mapping of epitopes for anti-HIV-1 gp41 monoclonal antibodies, consistent with X-ray data.
Conclusions:
- The homodimeric helical coiled-coil system effectively presents antigens and allows precise epitope mapping.
- This approach is valuable for antibody-drug discovery, epitope identification, and understanding coiled-coil protein structures.
