Fig. 4. APP-interacting proteins Jip1b and X11
have different effects on nuclear AICD localization. (A) Extranuclear localization of Jip1b. Binding of AICD to Jip1b was associated with decreased nuclear levels of AICD. (B) Co-expression of Tip60 relocalized Jip1b into nuclear speckles. (C) Additional co-expression of AICD resulted in the formation of nuclear AICD-Jip1-Tip60 (AJT) complexes with a distinct speckle-like morphology, as compared with the smaller spherical spots generated by AFT-complexes. (D) Exclusive extranuclear localization of X11
. Binding of AICD to X11
was associated with decreased nuclear levels of AICD. (E) Co-expression of Tip60 had no effect on the extranuclear localization of either X11
or AICD. Bar, 10 µm.