Journal
PROTEOMICS
Volume 4, Issue 9, Pages 2602-2607Publisher
WILEY
DOI: 10.1002/pmic.200300766
Keywords
aldehyde-dextran; intermolecular crosslinking; protein-protein interactions
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A very simple strategy, based on the intermolecular cross-linking of associated proteins by using aldehyde-dextrans, has been proposed to detect protein-protein interactions. Aldehyde-dextran was able to cross-link different enzymes composed of several polypeptide chains (e.g., trypsin and penicillin G acylase), proteolyzated proteins (e.g., extracts from porcine pancreas) and finally, an immunocomplex (horseradish peroxidase/anti-horseradish peroxidase). This cross-linked immunocomplex could be selectively adsorbed on immobilized anti-rabbit IgG. The presence of unspecific covalent attachment between unrelated protein molecules was not detected. Thus, this strategy permits the cross-linking of different protein components and avoids the formation of nonspecific protein-protein associations.
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