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Multiplexed Antigen Bead Arrays for the Assessment of Antibody Selectivity and Epitope Mapping

Burcu Ayoglu1, Peter Nilsson1, Jochen M Schwenk2

  • 1Affinity Proteomics, SciLifeLab, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH-Royal Institute of Technology, Stockholm, Sweden.

Methods in Molecular Biology (Clifton, N.J.)
|May 2, 2018
PubMed

With the increasing number of binding reagents for affinity-based investigations of the human proteome, high-throughput tools for the characterization of the used reagents become essential. For the analysis of binding selectivity, bead-based antigen arrays offer a miniaturized and parallelized assay platform to meet such needs, as they enable two-dimensional multiplexing to analyze up to 384 samples against up to 500 analytes in a single round of analysis. In this chapter, we describe our protocols for the generation of multiplex bead arrays built on immobilized protein fragments, as well as biotinylated peptides. Combined together, these two versions of antigen arrays offer a versatile approach for multiplexed characterization of antibody binding selectivity, off-target interactions, as well as mapping for the amino acids of epitopes involved in antibody binding.

Keywords:
Affinity proteomicsAntibody selectivityAntigen arraysEpitope mappingPeptide arraysProtein arraysSuspension bead arrays

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