Scaffold optimization in discontinuous epitope containing protein mimics of gp120 using smart libraries

Mulder, G. E., Quarles van Ufford, H. (L.). C., van Ameijde, J., Brouwer, A. J., Kruijtzer, J. A. W. and Liskamp, R. M. J. (2013) Scaffold optimization in discontinuous epitope containing protein mimics of gp120 using smart libraries. Organic and Biomolecular Chemistry, 11(16), pp. 2676-2684. (doi: 10.1039/c3ob27470e)

Abstract

A diversity of protein surface discontinuous epitope mimics is now rapidly and efficiently accessible. Despite the important role of protein–protein interactions involving discontinuous epitopes in a wide range of diseases, mimicry of discontinuous epitopes using peptide-based molecules remains a major challenge. Using copper(_I) catalyzed azide–alkyne cycloaddition (CuAAC), we have developed a general and efficient method for the synthesis of collections of discontinuous epitope mimics. Up to three different cyclic peptides, representing discontinuous epitopes in HIV-gp120, were conjugated to a selection of scaffold molecules. Variation of the scaffold molecule, optimization of the ring size of the cyclic peptides and screening of the resulting libraries for successful protein mimics led to an HIV gp120 mimic with an IC₅₀ value of 1.7 μM. The approach described here provides rapid and highly reproducible access to clean, smart libraries of very complex bio-molecular constructs representing protein mimics for use as synthetic vaccines and beyond.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Liskamp, Professor Robert
• Authors: Mulder, G. E., Quarles van Ufford, H. (L.). C., van Ameijde, J., Brouwer, A. J., Kruijtzer, J. A. W., and Liskamp, R. M. J.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Organic and Biomolecular Chemistry
• Publisher: Royal Society of Chemistry
• ISSN: 1477-0520
• ISSN (Online): 1477-0539