Figure 1. Components of the assay.
The assay relies on three components: an FRB-tagged candidate vesicle binding protein, an FKBP-tagged molecular motor, and a means to specifically label the vesicles of interest. In the presence of linker drug, the FKBP and FRB domains heterodimerize. The vesicle is unaffected if the FRB-tagged candidate protein does not bind it (upper right). If the vesicle and the FRB-tagged candidate protein interact, then the presence of linker drug results in the recruitment of motors to the vesicle (lower right). Adapted from Jenkins et al., 2012.