Fig. 5. The transactivation domain of Sox17ß is required for ß-catenin
binding. COS-1 cells were transfected with (A) 3 µg of DNA encoding the
indicated V5-epitope tagged Sox17ß constructs or (B) 3 µg of DNA
encoding the indicated V5-epitope tagged Sox17
constructs. The
resulting cell extracts were either incubated with GST-agarose or
GST-ß-catenin-agarose. The input and bound V5-tagged proteins were
visualized by anti-V5 immunoblotting. Mutations or deletion of the conserved
transactivation motif in either Sox17ß or Sox17
impairs or
abolishes ß-catenin binding.