The EEF1E1 Knockout HEK293T Polyclonal Cells product comprises a polyclonal HEK293T cell population engineered via CRISPR/Cas9-mediated gene disruption of the EEF1E1 locus. This knockout model provides a powerful tool for investigating the functional roles of EEF1E1, a guanine nucleotide exchange factor (GEF) essential for translation elongation. By generating a heterogeneous pool of edited cells, this polyclonal format captures a range of allelic disruptions, reflecting the complexity of genetic loss-of-function phenotypes while avoiding clonal selection artifacts.
The host cell line is HEK293T, an adherent epithelial line derived from human embryonic kidney cells transformed with sheared adenovirus type 5 DNA. These cells stably express the SV40 large T-antigen, which enables episomal replication of plasmids containing the SV40 origin, leading to high-level recombinant protein expression and efficient viral production. HEK293T cells are widely employed in basic and translational research due to their robust translational machinery and ease of transient transfection, making them an ideal parental line for studying protein synthesis and its regulatory components.
EEF1E1 encodes a subunit of the eEF1B complex that functions as a GEF for elongation factor 1-alpha (eEF1A). Mechanistically, EEF1E1 catalyzes the exchange of GDP for GTP on eEF1A, a reaction that is stimulated by mTORC1 signaling and transcriptionally regulated by the MYC oncogene. This GTP-bound eEF1A then delivers aminoacyl-tRNA to the ribosomal A-site, promoting peptide chain elongation. EEF1E1 directly interacts with eEF1A and the eEF1B complex components EEF1B2 and EEF1D, and its activity is crucial for maintaining global protein synthesis rates. Disruption of EEF1E1 thus compromises translation elongation efficiency and downstream protein output.
In HEK293T cells, which exhibit exceptionally high translational capacity owing to their viral transformation and SV40 T-antigen-mediated enhancement of host protein synthesis, knockout of EEF1E1 creates a model system to assess the role of elongation factors in sustaining elevated translational output. This polyclonal knockout population allows researchers to examine how loss of EEF1E1 affects polysome profiles, ribosome occupancy, and global translation rates, providing insights into the regulatory nodes controlling protein synthesis under conditions of rapid cell proliferation often associated with cancer.
Typical applications include studying translational control mechanisms, investigating the contributions of elongation factors to oncogenic transformation, and screening for small-molecule translation inhibitors. Researchers can employ a range of assays such as polysome profiling, ribosome profiling, puromycin incorporation-based protein synthesis assays, GTPase activity measurements, co-immunoprecipitation of the eEF1 complex, and RT-qPCR for confirming EEF1E1 disruption. These analyses enable detailed functional dissection of the translation elongation machinery in a genetically tractable cell background. For further technical details or ordering information, please contact Ascent Research.
