Aliases for KPNA1 Gene
External Ids for KPNA1 Gene
Previous GeneCards Identifiers for KPNA1 Gene
The transport of molecules between the nucleus and the cytoplasm in eukaryotic cells is mediated by the nuclear pore complex (NPC), which consists of 60-100 proteins. Small molecules (up to 70 kD) can pass through the nuclear pore by nonselective diffusion while larger molecules are transported by an active process. The protein encoded by this gene belongs to the importin alpha family, and is involved in nuclear protein import. This protein interacts with the recombination activating gene 1 (RAG1) protein and is a putative substrate of the RAG1 ubiquitin ligase. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2012]
GeneCards Summary for KPNA1 Gene
KPNA1 (Karyopherin Subunit Alpha 1) is a Protein Coding gene. Diseases associated with KPNA1 include Influenza and Ovarian Endodermal Sinus Tumor. Among its related pathways are Cytokine Signaling in Immune system and Transport of the SLBP independent Mature mRNA. Gene Ontology (GO) annotations related to this gene include binding and nuclear localization sequence binding. An important paralog of this gene is KPNA6.
UniProtKB/Swiss-Prot for KPNA1 Gene
Functions in nuclear protein import as an adapter protein for nuclear receptor KPNB1. Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Docking of the importin/substrate complex to the nuclear pore complex (NPC) is mediated by KPNB1 through binding to nucleoporin FxFG repeats 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 importin-beta and the three components separate and importin-alpha and -beta are re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. 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. In vitro, mediates the nuclear import of human cytomegalovirus UL84 by recognizing a non-classical NLS.