Complementary positional proteomics for screening substrates of endo- and exoproteases.

Van Damme, Petra; Staes, An; Bronsoms, Silvia; Helsens, Kenny; Colaert, Niklaas; Timmerman, Evy; Aviles, Francesc X; Vandekerckhove, Joël et al. · Nat Methods · 2010

basic_science · Level V

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Abstract

We describe a positional proteomics approach to simultaneously analyze N- and C-terminal peptides and used it to screen for human protein substrates of granzyme B and carboxypeptidase A4 in human cell lysates. This approach allowed comprehensive proteome studies, and we report the identification of 965 database-annotated protein C termini, 334 neo-C termini resulting from granzyme B processing and 16 neo-C termini resulting from carboxypeptidase A4 processing.

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