Figure 5.
Co-localization of ataxin-2 and ataxin-2 binding protein 1 (A1BP1) in transiently transfected COS1 cells. Single confocal sections through the nucleus are shown. COS1 cells were co-transfected with pDsRed2-A2BP1 (Red) and pEGFP-ataxin-2 (Green). After 24 hours, cells were immunofluorescently stained with mouse anti-Golgi58 antibody, and visualized with C5 conjugated antimouse IgG (Blue). A2BP1 colocalizes with full-length ataxin-2[Q22] in the Golgi apparatus. Expansion of the polyQ repeats disrupts the Golgi apparatus but ataxin-2[Q58] still colocalizes with A2BP1 in Golgi elements. Deletion within the LsmAD prevents ataxin-2 and A2BP1 localization in the Golgi apparatus, and retains A2BP1 in the nucleus.