Aliases for IPO4 Gene
External Ids for IPO4 Gene
Previous GeneCards Identifiers for IPO4 Gene
GeneCards Summary for IPO4 Gene
IPO4 (Importin 4) is a Protein Coding gene. Gene Ontology (GO) annotations related to this gene include binding and Ran GTPase binding.
UniProtKB/Swiss-Prot for IPO4 Gene
Functions in nuclear protein import as nuclear transport receptor. Serves as receptor for nuclear localization signals (NLS) in cargo substrates. Is thought to mediate docking of the importin/substrate complex to the nuclear pore complex (NPC) through binding to nucleoporin and the complex is subsequently translocated through the pore by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to the importin, the importin/substrate complex dissociates and importin is re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus (By similarity). Mediates the nuclear import of RPS3A. In vitro, mediates the nuclear import of human cytomegalovirus UL84 by recognizing a non-classical NLS.