Figure 8.
Overexpression of the GLEBS-like motif of NUP98 results in decreased levels of RAE1 at the NE. (A–D′ inclusive) Paired confocal images from HtTA cells that transiently express various forms of the GLEBS-like motif of NUP98. Cells were double-stained for HA1-tagged protein using the 12CA5 monoclonal antibody (left) and for RAE1 using affinity-purified RAE1 polyclonal rabbit antibodies. Cells shown in the confocal images are representative for results obtained in three to four independent experiments. High magnification images are given to illustrate detail. (A, A′, B, and B′) Overexpression of the GLEBS-like motif leads to a subtle but significant decrease in NE localization of RAE1. Compare NE staining of cells that do not overexpress the RAE1-binding (nt) and cells that do (t). (C, C′, D, and D′) Cells expressing a GLEBS-like motif mutant that is unable to interact with RAE1 or full-length NUP98 (D and D′) display an RAE1-distribution pattern comparable with that of wild-type HtTA cells.