KPNB1 — Karyopherin subunit beta 1
KPNB1 belongs to a gene co-expression module in 6 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
KPNB1's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| CD8⁺ T cells | Nucleocytoplasmic Transport RNA processing & translation | KHDRBS1, MAT2A, NFATC2IP, RBMX, SNX5, SSR3, TRA2B | View in SCUBA |
| Endothelial | Nuclear Transport Housekeeping | AAMDC, ANP32B, CBX5, CDK4, CKAP4, COMMD4, COQ2, CSE1L +18 more | View in SCUBA |
| Gamma-delta T cells | Chromatin Remodeling DNA/chromatin regulation | ACTN4, ANP32E, AP2B1, CCDC82, EIF2B1, EXOSC10, FAR1, FLII +17 more | |
| Innate lymphoid cells | JAK-STAT Cytokine Signaling Inflammation | AASDHPPT, ARHGAP9, CHURC1, CIDEB, CSK, DCAF7, DENND2D, EDEM2 +23 more | View in SCUBA |
| Macrophages | mRNA Splicing Processing Housekeeping | AP3D1, BAZ1B, CCDC47, CHTOP, CTCF, EIF1AX, EIF3A, HDLBP +29 more | View in SCUBA |
| Mucosal-associated invariant T cell | Actin Cytoskeletal Remodeling Cytoskeletal | ANXA6, CAP1, CASP1, CCT5, CCT6A, DEF6, FGD3, GIMAP6 +7 more |
About the gene
| Synonyms | IMB1, Impnb, IPO1, IPOB, MGC2155, MGC2156, MGC2157, NTF97 |
|---|---|
| Chromosome | 17: 47649476-47685505 |
| Predicted location | Intracellular |
| Essential gene | Yes |
| Protein class | Essential proteins, Plasma proteins, Predicted intracellular proteins, Transporters |
| Biological process | Host-virus interaction, Protein transport, Transport |
Function
Functions in nuclear protein import, either in association with an adapter protein, like an importin-alpha subunit, which binds to nuclear localization signals (NLS) in cargo substrates, or by acting as autonomous nuclear transport receptor. Acting autonomously, serves itself as NLS receptor. 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. Mediates autonomously the nuclear import of ribosomal proteins RPL23A, RPS7 and RPL5. In association with IPO7, mediates the nuclear import of H1 histone. In vitro, mediates nuclear import of H2A, H2B, H3 and H4 histones (By similarity). Imports MRTFA, SNAI1 and PRKCI into the nucleus. (Microbial infection) In case of HIV-1 infection, binds and mediates the nuclear import of HIV-1 Rev.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.