Small GTPase required for proper nuclear import of RNA polymerase II (RNAPII) (, ). May act at an RNAP assembly step prior to nuclear import . Forms an interface between the RNA polymerase II enzyme and chaperone/scaffolding proteins, suggesting that it is required to connect RNA polymerase II to regulators of protein complex formation . May be involved in nuclear localization of XPA .
Subcellular locations: Cytoplasm, Nucleus
Shuttles between the nucleus and the cytoplasm.
Expressed ubiquitously.