The BZW2 Knockout A-549 Polyclonal Cells product provides a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung adenocarcinoma cell line, in which the BZW2 gene has been disrupted to abolish its expression. This polyclonal pool contains a heterogeneous mixture of edited alleles, generating a loss-of-function model that avoids clonal artifacts while reflecting population-level effects of BZW2 deficiency. The knockout model is designed to support interrogation of BZW2 function in translation control, amino acid metabolism, and cancer cell signaling without relying on a single clonal isolate, enabling robust and reproducible functional studies.
The parental A-549 cell line is an adherent epithelial model originally isolated from a human lung adenocarcinoma and widely used as a representative system for non-small cell lung cancer (NSCLC). These cells retain key characteristics of alveolar epithelial progenitors and exhibit constitutive activation of growth factor signaling pathways, making them a relevant substrate for investigating oncogenic mechanisms. The A-549 background is particularly suited for studying the interplay between translational regulation and tumorigenesis, as lung adenocarcinoma cells are highly dependent on sustained protein synthesis and stress adaptation for proliferation and survival.
BZW2 functions as a scaffold protein within the multisynthetase complex (MSC), where it interacts with EPRS, QARS, AIMP1, and AIMP2 to channel aminoacyl-tRNAs to the ribosome, promoting efficient translation elongation. Beyond its structural role, BZW2 modulates mTOR-dependent protein synthesis and cell cycle progression. Its expression is regulated by MYC, E2F, and GCN2, particularly under amino acid deprivation. Downstream, it influences Cyclin D1, Cyclin E, c-Myc, and EIF4E, and modulates mTOR?CS6K?C4E-BP1 signaling and the integrated stress response (EIF2???CATF4). The knockout disrupts these interactions, leading to impaired tRNA channeling, attenuated translation initiation, and compromised proliferative signaling.
In the A-549 lung adenocarcinoma context, loss of BZW2 is anticipated to perturb the balance between growth-promoting translation and stress adaptation. NSCLC cells frequently upregulate translation machinery to sustain uncontrolled growth, and BZW2’s scaffolding function may be co-opted to support protein synthesis demands. Disruption of BZW2 in this background can reveal vulnerabilities related to amino acid sensing, mTOR activity, and cell cycle regulation. The polyclonal knockout population allows assessment of BZW2-dependent phenotypes without the confounding effects of clonal selection, providing a physiologically relevant tool to study tumor cell fitness, metabolic adaptation, and the cellular response to nutrient stress in a cancer-relevant setting.
Researchers can employ these polyclonal knockout cells in a variety of assays to dissect BZW2 function. Typical applications include Western blotting for confirmation of protein loss, proliferation and migration assays to evaluate tumorigenic capacity, puromycin incorporation assays to measure acute protein synthesis rates, and phospho-signaling analyses for mTOR pathway activity (e.g., p-S6K, p-4E-BP1). Transcriptomic profiling via RNA-seq or targeted RT-qPCR of downstream targets such as CCND1 and CCNE1 can elucidate gene expression changes, while co-immunoprecipitation with MSC components validates disrupted protein interactions. Apoptosis and stress response assays further characterize cellular adaptation following BZW2 knockout. For detailed technical specifications or ordering information, please contact Ascent Research.
