The IPO5 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population targeting the IPO5 gene. This loss-of-function model enables study of importin-5, a nuclear transport receptor in the importin beta family. Generated via CRISPR/Cas9-mediated gene disruption in the near-haploid HAP1 cell line, this polyclonal pool provides a genetically diverse background while ablating IPO5 function, suitable for functional genomics and cancer research.
HAP1 cells are a fibroblast-like, near-haploid line derived from chronic myeloid leukemia. Their haploid state facilitates gene targeting and yields clear loss-of-function phenotypes. HAP1 cells retain active nuclear transport and growth signaling, making them ideal for studying essential genes like IPO5, which is involved in ribosome biogenesis and cell cycle progression.
IPO5 encodes importin-5, an importin beta family receptor that mediates nuclear import of ribosomal proteins RPL23A and RPS7, histones H2A and H3, and transcription factor c-Jun. It binds cargo in the cytoplasm and translocates through nuclear pore complexes by interacting with nucleoporins NUP50, NUP153, and NUP358. Nuclear RanGTP, generated by RCC1, triggers cargo release. IPO5 activity is regulated by the Ran GTPase cycle and upstream signals including CDKs and MYC, linking transport to cell proliferation. Disruption of IPO5 impairs import of these cargos, affecting ribosome assembly and chromatin organization.
In the HAP1 background, IPO5 knockout likely yields pronounced phenotypes due to haploidy. Loss of importin-5 disrupts nuclear import of ribosomal proteins and histones, potentially causing defects in protein synthesis and chromatin structure. This model is valuable for studying nucleocytoplasmic transport in a leukemic context and for identifying cancer vulnerabilities. The absence of a second allele simplifies interpretation of gene essentiality and synthetic lethal interactions.
Applications include genetic screens for transport modulators, drug target validation, and ribosome biogenesis studies. Downstream assays such as immunofluorescence, western blotting, ribosome profiling, and proliferation assays can be employed. RNA-seq may reveal global transcriptomic changes. This knockout pool also supports immunoprecipitation and in vitro transport assays. For more information, contact Ascent Research.
