BMC Biophys 2013 Jun 3;6. Epub 2013 Jun 3.
Department of Physics and Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306, USA.
A recent study by Dietz et al. using single-molecule fluorescence microscopy techniques demonstrates that, in the absence of the ligand InlB, the MET receptor exists as both a monomer and a dimer on the cell membrane, and addition of the ligand leads to increased MET dimerization. Under the crowded conditions of the cell membrane, dimer formation may be a common phenomenon for cell surface receptors. Ligand binding to both monomeric and dimeric receptors may provide parallel routes to receptor activation.