Bioluminescence Resonance Energy Transfer: An Emerging Tool for the Detection of ProteinProtein Interaction in Living Cells

In the field of proteomics, numerous advanced technologies have evolved that aim to provide the molecular data necessary for an in-depth understanding of biological processes. Protein–protein interactions (PPI) are at the heart of cellular function and a milestone yet to be achieved is the mapping of a complete human interactome. Bioluminescence resonance energy transfer (BRET) has become a popular technique to investigate PPI. As BRET enables the detection of PPI in living cells, problems associated with in vitro biochemical assays can be circumvented, thus making BRET a powerful tool for monitoring interactions of virtually all kinds of protein species.