FIGURE 1.
Usp9x interacts with the SMN complex. A, diagram of the FLAG-Usp9x-HTBH expression construct. B, immunoblotting (IB) of FLAG or HRP-conjugated streptavidin in cell lysates from 293T cells stably expressing FLAG-HTBH (control) or FLAG-Usp9x-HTBH. C, silver staining of purified Usp9x and its interacting proteins resolved by SDS-PAGE. D, peptides of SMN, Gemins 2–5 identified by mass spectrometry. E, immunoblotting of SMN, Usp9x, and Gemins in mass spectrometric samples shown in C. F, immunoblotting of proteins co-immunoprecipitated with endogenous SMN in HeLa cells. G, immunoblotting of proteins co-immunoprecipitated with endogenous Usp9x in HeLa cells.