Recombinant Human Importin-4 (IPO4), Truncated

Uniprot Id

Q8TEX9

Target Species

Human

Target Name

IPO4

Target Full Name

Importin-4

Target Function

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. Mediates the nuclear import of RPS3A. In vitro, mediates the nuclear import of human cytomegalovirus UL84 by recognizing a non-classical NLS.

Target Subcellular Location

Cytoplasm. Nucleus.

Target Protein Families

Importin beta family

Target Synonyms

Imp4; Imp4b; Importin 4; Importin 4b; Importin-4; Importin-4b; Ipo4; IPO4_HUMAN; Ran binding protein 4; Ran-binding protein 4; RanBP4

Target Background

Predicted to enable nuclear import signal receptor activity and nuclear localization sequence binding activity. Involved in DNA replication-dependent chromatin assembly; DNA replication-independent chromatin assembly; and protein import into nucleus. Located in chromatin. Part of protein-containing complex.