The BAG1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population of HAP1 cells with targeted disruption of the BAG1 gene. This polyclonal knockout model provides a heterogeneous pool of BAG1-deficient cells, enabling loss-of-function studies without clonal artifacts. It is designed for advanced research applications in cell survival signaling and apoptosis.
HAP1 is a near-haploid human cell line derived from the KBM-7 chronic myeloid leukemia line. It exhibits an adherent growth pattern and a male karyotype with a stable haploid chromosome number, which simplifies genetic analyses by eliminating allelic variability. HAP1 cells are widely used in functional genomics and high-throughput genetic screens due to their capacity to reveal clear loss-of-function phenotypes.
BAG1 encodes a co-chaperone that binds Hsp70 family chaperones (HSPA8 and HSPA1A) to regulate protein folding and proteasomal degradation. Through a direct interaction with the anti-apoptotic protein BCL2, BAG1 stabilizes pro-survival complexes and inhibits caspase activation. It also associates with signaling effectors such as RAF1 and AKT1, integrating upstream cues from EGF, IGF-1, and IL-2 to promote cell survival via the MAPK/ERK and PI3K/AKT cascades. Additionally, BAG1 modulates NF-??B signaling by influencing NFKBIA and participates in androgen receptor transcriptional regulation, linking it to multiple oncogenic networks.
Disrupting BAG1 in the near-haploid HAP1 background creates a genetically defined platform to investigate its role in apoptosis resistance and signal transduction. The lack of a second allele ensures direct genotype?Cphenotype correlations. This model is especially valuable for studying the interplay between chaperone activity and cell death regulation, and for identifying vulnerabilities that emerge upon BAG1 loss under stress conditions or chemotherapeutic challenge.
Applications include cancer cell biology, drug resistance profiling, and apoptosis mechanism analysis. Standard assays such as co-immunoprecipitation for protein interactions, annexin V-based apoptosis assays, cell viability measurements, and immunofluorescence can be utilized. The polyclonal nature supports pooled synthetic lethality screens and functional genomics investigations. These cells are also compatible with Western blotting, qRT-PCR, flow cytometry, and proteasome activity assays, facilitating comprehensive characterization of BAG1-dependent processes. For additional information, please contact Ascent Research.
