The KPNA3 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population in which the KPNA3 gene has been disrupted in the HEK293T background. This product provides a mixed pool of loss-of-function alleles created by CRISPR/Cas9-mediated gene disruption, enabling population-level studies of KPNA3-dependent nuclear import pathways while minimizing clonal artifacts. The polyclonal format is well-suited for biochemical fractionation, reporter assays, and transcriptomic analyses where average population behavior is of primary interest.
HEK293T is a human embryonic kidney epithelial line stably expressing SV40 large T antigen. Derived from HEK293 cells via adenovirus type 5 E1A/E1B immortalization, HEK293T cells exhibit exceptionally high transfection efficiency, robust protein expression, and support episomal replication of plasmids bearing an SV40 origin. These attributes make HEK293T an optimal platform for mechanistic studies requiring efficient exogenous DNA delivery, including reconstitution experiments and viral vector production.
KPNA3 is an adaptor for classical nuclear import that recognizes NLSs on cargo and, together with KPNB1 (importin ??1), mediates nuclear pore complex translocation. It interacts with nucleoporins NUP62 and NUP153. Cargoes include NF-??B p65, STAT1, STAT3, c-Myc, p53, and HIV-1 Vpr. Upstream signals??TNF-??, IFN-??, EGF, and stress??regulate import, linking KPNA3 to NF-??B, JAK-STAT, cell cycle, and antiviral immunity pathways.
In HEK293T, KPNA3 disruption impairs nuclear translocation of its NLS-bearing cargoes, altering downstream gene expression and signaling dynamics. This knockout model is valuable for dissecting classical importin ??/??-dependent transcription factor shuttling, as HEK293T supports luciferase reporters, immunofluorescence localization, and biochemical fractionation. Since importin ?? family members exhibit functional redundancy, the polyclonal population aids in identifying cargo-specific requirements and evaluating pathway compensation when combined with additional perturbations or small-molecule inhibitors.
Applications include western blotting of nuclear/cytoplasmic fractions, immunofluorescence microscopy, NF-??B luciferase reporter assays, RT-qPCR of target genes, co-immunoprecipitation of transport complexes, viral replication assays, and flow cytometry for cell cycle analysis. The knockout cells are suitable for screening nuclear import inhibitors, studying nucleocytoplasmic trafficking in cancer, and probing signaling networks regulated by importin ??-mediated transport. For further information, please contact Ascent Research.
