Rabbit anti-Human KPNA4 Polyclonal Antibody

Uniprot Id

O00629

Target Species

Human

Target Name

KPNA4

Target Full Name

Importin subunit alpha-3

Target Function

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. 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 alpha family

Target Tissue Specificity

Highly expressed in testis, ovary, small intestine, heart, skeletal muscle, lung and pancreas, but barely detectable in kidney, thymus, colon and peripheral blood leukocytes.

Target Synonyms

FLJ31113; IMA3_HUMAN; Importin alpha 3; Importin alpha 4 subunit; Importin alpha Q1; Importin subunit alpha 3; Importin subunit alpha-3; IPO A3; IPOA 3; IPOA3; Karyopherin alpha 4 (importin alpha 3); Karyopherin alpha 4; Karyopherin alpha 4 importin alpha 3; Karyopherin alpha 4 subunit; Karyopherin subunit alpha 4 ; Karyopherin subunit alpha-4; KPNA 4; Kpna4; MGC12217; MGC26703; OTTHUMP00000213880; QIP 1; Qip1; Qip1 protein; SRP 3; SRP3

Target Background

The nuclear import of karyophilic proteins is directed by short amino acid sequences termed nuclear localization signals (NLSs). Karyopherins, or importins, are cytoplasmic proteins that recognize NLSs and dock NLS-containing proteins to the nuclear pore complex. The protein encoded by this gene shares the sequence similarity with Xenopus importin-alpha and Saccharomyces cerevisiae Srp1. This protein is found to interact with the NLSs of DNA helicase Q1 and SV40 T antigen.