background:
Importin 7 is a 1,038 amino acid protein encoded by the human gene IPO7. Importin-7 belongs to the importin b family and contains one importin N-terminal domain. Importin-7 functions in nuclear protein import, either by acting as an autonomous nuclear transport receptor or as an adapter-like protein in association with the Importin b subunit KPNB1. Acting autonomously, Importin-7 is thought to serve itself as receptor for nuclear localization signals (NLS) and to promote translocation of import substrates through the nuclear pore complex (NPC) by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to Importin-7, the Importin-7/substrate complex dissociates and Importin-7 is re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran. Importin-7 is a nuclear protein that is expressed in most tissues.
Function:
Functions in nuclear protein import, either by acting as autonomous nuclear transport receptor or as an adapter-like protein in association with the importin-beta subunit KPNB1. Acting autonomously, is thought to serve itself as receptor for nuclear localization signals (NLS) and to promote translocation of import substrates through the nuclear pore complex (NPC) by an energy requiring, Ran-dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to importin, the importin/substrate complex dissociates and importin is re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran.
Subunit:
Interacts with H2A, H2B, H3 and H4 histones (By similarity). Forms a heterodimer with KPNB1. Interacts with KPNB1, SNUPN, XPO1, RPL23A, RPS7, RPL5 and HISLV1 reverse transcription complex integrase. Binds directly to nuclear pore complexes (By similarity). Interacts with H2A, H2B, H3 and H4 histones. Binds to HISLV1 Rev.
Subcellular Location:
Cytoplasm. Nucleus.
Similarity:
Belongs to the importin beta family.
Contains 1 importin N-terminal domain.
Database links:
UniProtKB/Swiss-Prot: O95373.1
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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