The EIF2D Knockout HEK293T Polyclonal Cells are a polyclonal population of HEK293T cells in which the EIF2D gene has been disrupted by CRISPR/Cas9-mediated editing. This heterogeneous cell mixture reflects diverse knockout alleles and is ideally suited for functional studies of cap-independent translation without clonal bias. The polyclonal format captures population-level effects and is preferred for assays where variability mimics physiological conditions.
The HEK293T cell line, derived from human embryonic kidney HEK293 cells, stably expresses the SV40 large T antigen, allowing episomal replication of plasmids containing the SV40 origin. This feature, combined with rapid growth and epithelial character, makes HEK293T a standard host for recombinant protein expression, viral production, and investigation of translation mechanisms. The kidney lineage is relevant to studies of stress-induced translational regulation.
EIF2D is a translation initiation factor that delivers Met?tRNAi directly to the 40S ribosomal P?site in a GTP?independent manner, bypassing eIF2. This enables translation of leaderless and structured mRNAs under stress when eIF2?? is inhibited. EIF2D is regulated by MYC and mTORC1, and interacts with ribosomal subunits and eIF5B. Its targets include stress?responsive and viral mRNAs, placing it at the center of translational reprogramming during the integrated stress response.
In the HEK293T background, EIF2D knockout provides a clear model for studying cap?independent translation. HEK293T cells have high mTORC1 and MYC activity, which normally drive EIF2D expression; thus, their loss reveals EIF2D?dependent translation events. The model is valuable for ribosome profiling experiments comparing wild?type and knockout cells under normal and stressed conditions, such as amino acid starvation or ER stress, to identify mRNAs that rely on this non?canonical initiation factor.
This knockout population is suitable for Western blotting and RT?qPCR validation, as well as polysome profiling and ribosome footprinting to measure translation. Luciferase reporters with leaderless or structured UTRs can quantify EIF2D?dependent initiation. Stress induction assays (e.g., amino acid deprivation, tunicamycin treatment) combined with proteomics can reveal downstream proteomic changes. The model also facilitates viral replication studies and screening for translation inhibitors. For additional technical details or custom applications, please contact Ascent Research.
