Identification of cell-surface molecular interactions under living conditions by using the enzyme-mediated activation of radical sources (EMARS) method

Sensors (Basel). 2012 Nov 22;12(12):16037-45. doi: 10.3390/s121216037.


Important biological events associated with plasma membranes, such as signal transduction, cell adhesion, and protein trafficking, are mediated through the membrane microdomains. We have developed a novel method termed enzyme-mediated activation of radical sources (EMARS) to identify coclustering molecules on the cell surface under living conditions, which features a radical formation from an aryl azide reagent by horseradish peroxidase (HRP). For identification of molecules labeled by the EMARS reaction, antibody array system and mass spectrometry-based proteomics approaches are available. Spatio- temporally-regulated interaction between b1 integrin and ErbB4 involved in fibronectin-dependent cell migration and therapeutic antibody-stimulated interaction between FGFR3 and CD20 were discovered using the EMARS method.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Azides / chemistry
  • Biosensing Techniques*
  • Cell Line
  • Cell Membrane / chemistry*
  • Cell Membrane / metabolism
  • Horseradish Peroxidase / chemistry
  • Horseradish Peroxidase / metabolism
  • Humans
  • Membrane Microdomains / chemistry*
  • Membrane Microdomains / metabolism*
  • Proteomics


  • Azides
  • Horseradish Peroxidase