The EEF1A1 Knockout HAP1 Polyclonal Cells offer a versatile loss-of-function model for studying the EEF1A1 gene in human hematopoietic cells. This product consists of a polyclonal population of HAP1 cells (Homo sapiens) that have undergone CRISPR/Cas9-mediated gene disruption at the EEF1A1 locus, resulting in a heterogeneous knockout pool. This format avoids artifacts associated with single-cell cloning and is well-suited for pooled functional screens and population-scale assays.
HAP1 is a near-haploid human cell line originally derived from the KBM-7 chronic myeloid leukemia isolate. Its largely haploid karyotype facilitates genetic manipulation and ensures unambiguous genotype?Cphenotype correlations, making it an ideal platform for CRISPR-based knockout studies. The cell line maintains the core malignant signaling networks of its leukemic origin and grows as an adherent monolayer, enabling high-throughput phenotypic assays.
EEF1A1 encodes the alpha subunit of elongation factor-1, which catalyzes the GTP-dependent binding of aminoacyl-tRNA to the ribosomal A-site during translation elongation. Beyond its canonical role, EEF1A1 governs actin cytoskeleton dynamics and inhibits apoptosis by suppressing BAX and BAK. Its transcription is driven by mTORC1 and MYC, while serum and growth factors further modulate its activity. EEF1A1 physically associates with the eEF1B nucleotide exchange complex, actin filaments, and viral proteins such as HIV-1 Gag. Through these interactions, EEF1A1 integrates proliferative signals to coordinate protein synthesis, cytoskeletal organization, and cell survival.
The disruption of EEF1A1 in HAP1 cells results in a significant decrease in translation elongation rates, as assessed by puromycin incorporation, and concurrent remodeling of the actin cytoskeleton, visualized by phalloidin staining. Loss of EEF1A1 also relieves its anti-apoptotic inhibition of BAX and BAK, rendering cells more prone to apoptotic death, which can be quantified by Annexin V flow cytometry. These combined effects instill a growth disadvantage and highlight the multifaceted role of EEF1A1. The near-haploid HAP1 background enhances the penetrance of these phenotypes, providing a highly sensitive model for dissecting the crosstalk between protein synthesis, cytoskeletal dynamics, and cell survival.
Such polyclonal knockout cells are particularly valuable for pooled functional genomics screens, including genome-wide dropout screens, where robust population-level phenotypes are required. Additional applications include mechanistic studies of translation elongation control, investigation of host factor utilization by viruses like HIV-1, and cancer biology experiments examining the role of EEF1A1 in tumor cell proliferation and apoptosis evasion. Standard downstream analyses encompass western blotting, RNA-seq, quantitative proteomics, cell proliferation assays, and apoptosis detection using Annexin V or caspase activation markers. The polyclonal format ensures that any observed effects are not due to clonal idiosyncrasies, thereby increasing confidence in the biological relevance of findings. For further details or custom modeling requests, contact Ascent Research.
