The EIF4H Knockout HEK293T Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population targeting the EIF4H gene. This heterogeneous pool of edited cells provides a robust loss-of-function model for studying EIF4H-dependent translation regulation. By introducing diverse genetic disruptions across the cell population, the product avoids clonal artifacts and enables assessment of gene function in a physiologically relevant, pooled context. It is intended for advanced research on translational control and oncogenic signaling.
HEK293T cells are immortalized human embryonic kidney epithelial cells that stably express the SV40 large T-antigen, enabling episomal plasmid replication and high-level protein expression. This line is a standard platform for recombinant protein production, lentiviral packaging, and cell-based assays. Its epithelial origin and ease of transfection make it particularly suited for studying gene regulatory networks, including those governing cap-dependent translation.
EIF4H enhances the ATP-dependent helicase activity of eIF4A, a component of the eIF4F initiation complex, to unwind structured 5′ UTRs upstream of ribosome scanning. This facilitates translation of mRNAs encoding growth-related proteins such as MYC, CCND1, and BCL2. EIF4H interacts directly with eIF4A and eIF4G and is regulated by mTORC1 signaling. Growth factors stimulate mTORC1 to phosphorylate 4E-BP1, releasing eIF4E to form active eIF4F. Thus, EIF4H acts as a key node connecting nutrient stimuli to the selective translation of structured, pro-survival transcripts.
In HEK293T cells, EIF4H knockout allows dissection of how structured mRNA translation impacts processes relevant to cancer, neurobiology, and virology. These cells support high translational output and viral propagation, making the knockout a valuable tool for studying how oncogenic pathways like MYC and CCND1 become translationally upregulated, or how viruses co-opt the host eIF4F machinery. The polyclonal format captures a spectrum of loss-of-function alleles, offering comprehensive phenotype characterization without clonal selection constraints.
Applications include dual-luciferase reporter assays to quantify 5′ UTR-dependent translation, polysome profiling for ribosome occupancy measurements, and RNA immunoprecipitation to assess eIF4F-mRNA interactions. Western blotting of downstream targets MYC and BCL2, along with cell proliferation assays, enables functional validation of mTOR-eIF4F axis inhibitors. This polyclonal knockout pool is an efficient resource for functional genomics screens and drug discovery programs targeting translational dysregulation. For custom requests, contact Ascent Research.
