Structure of the exportin Xpo4 in complex with RanGTP and the hypusine-containing translation factor eIF5A

Abstract

Xpo4 imports Sox2 and other proteins into the cell nucleus, while exporting eIF5A or Smad3; how it recognizes these proteins has been unclear. Here, the authors solved the crystal structure of the RanGTP, Xpo4 and eIF5A complex and investigate how Xpo4 identifies its major export cargo.