Process for the modification and identification of functional sites in proteins

摘要

The invention relates to a method for identifying one or more functional sites in proteins. Said method is characterized by the following steps: a) contacting the target protein with a binding partner (BP tag) linked with a laser-activatable marker (tag), resulting in a complex consisting of target protein and BP tag, b) irradiating the complex consisting of target protein and BP tag with laser light, resulting in the formation of free radicals which selectively modify the bound target protein at the binding site, and c) identifying the selectively modified region of the protein by a combination of protein cleavage and mass spectrometry. The invention further relates to a device for carrying out the inventive method.