Detecting protein–protein interactions by Xe-129 NMR†
Abstract
Detection of protein–protein interactions (PPIs) is limited by current bioanalytical methods. A protein complementation assay (PCA), split TEM-1 β-lactamase, interacts with xenon at the interface of the TEM-1 fragments. Reconstitution of TEM-1—promoted here by cFos/cJun leucine zipper interaction—gives rise to sensitive 129Xe NMR signal in bacterial cells.