Figure 3.
Representative western blots of GST-APs for proteins that interacted with the CACNA1A_MPI but not CACNA1A_MPc isoform by Y2H mating assay (Table 1). The myc-tagged prey and GST-tagged baits are indicated (empty vector, MPc or MPI polyQ length). Blotting antibodies are anti-myc and anti-GST as indicated. (A) The myc-TSC22D1 interaction is neither isoform nor polyQ length dependant in mammalian cells. (B) The myc-RBM12B interaction with CACNA1A is not isoform specific, but for MPI is polyQ length dependant, interacting with the disease-causing 23Q and hyper-expanded 72Q but not the wild-type 11Q baits. (C) The myc-BZRAP1 interaction with CACNA1A is isoform, but not polyQ length dependant. (D) The myc-YLPM1 interaction with CACNA1A is both isoform and polyQ length dependant.