Analysis of the topology of protein complexes using cross-linking and mass spectrometry
Abstract:
INTRODUCTIONThis protocol is designed to allow identification of spatial relationships between proteins within a wide variety of multiprotein complexes. Details for optimizing cross-linking of proteins within multiprotein complexes are provided. Following the cross-linking reaction, the proteins are separated by one-dimensional PAGE, the cross-linked proteins are isolated from the gel, and the individual members of the cross-linked complexes are identified by mass spectrometry. The protocol can be used to analyze many protein complexes isolated by any purification technique, provided the protein complexes remain in their native configuration.
Related Concept Videos
Protein Networks
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Mass Spectrometry: Complex Analysis
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
Proteomics
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Peptide Identification Using Tandem Mass Spectrometry
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...

