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Activity-based protein profiling (ABPP) is a powerful analytical method to detect and compare the activity of proteins in proteomes. This is achieved using specific activity-based probes that are often derived from inhibitors and are linked to reporter groups like rhodamine or biotin for fluorescence detection and/or affinity purification, respectively. The probes react with the active site residue of proteins and become covalently and irreversibly attached, facilitating the separation, detection and identification of the labelled proteins. In this protocol we describe all the steps required for labelling, purification and identification of labelled proteins from gels and show how activities in two proteomes can be compared. The identification of serine hydrolases from Arabidopsis plants infected with Botrytis cinerea using the trifunctional probe TriFP is used as an example.

Original publication

DOI

10.1007/978-1-61779-501-5_3

Type

Journal article

Journal

Methods Mol Biol

Publication Date

2012

Volume

835

Pages

47 - 59

Keywords

Affinity Labels, Arabidopsis, Botrytis, Electrophoresis, Fluorescent Dyes, Host-Pathogen Interactions, Plant Proteins, Proteomics, Serine Proteases