The AKAP8 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed for targeted disruption of the AKAP8 gene in the HAP1 human near-haploid cell line. This product provides a genetically heterogeneous pool of knockout cells, enabling robust investigation of AKAP8-dependent signaling and cellular functions.
HAP1 cells are a near-haploid derivative of the KBM-7 chronic myeloid leukemia (CML) cell line, widely employed as a genetically tractable model for functional genomics and leukemia research. Their haploid karyotype facilitates the generation of complete gene knockouts via CRISPR/Cas9, as disruption of a single allele is sufficient to produce a null phenotype. This background supports high-throughput screening and mechanistic studies, particularly in the context of oncogenic signaling pathways relevant to CML and other hematological malignancies.
AKAP8 (A-kinase anchoring protein 8) functions as a nuclear scaffold that tethers PKA regulatory subunits (RI?? and RII??) to chromatin and mitotic chromosomes, thereby localizing cAMP/PKA signaling to specific subnuclear sites. AKAP8 integrates upstream inputs from cAMP, the PKA catalytic subunit, CDK1/cyclin B, and Aurora B kinase to orchestrate the phosphorylation of key substrates, including condensin components (SMC2, SMC4), histone H3, and the transcription factor CREB. Through association with HDAC3, DEK, MLL2, and RNA polymerase II, AKAP8 regulates both transcriptional programs and chromosome condensation.
In the HAP1 leukemia model, AKAP8 knockout abolishes nuclear PKA anchoring, leading to disrupted cAMP-responsive phosphorylation of mitotic and transcriptional targets. This manifests as defective chromosome condensation and altered gene expression, contributing to cell cycle abnormalities and impaired proliferation. The loss of AKAP8-mediated scaffolding thus compromises the fidelity of mitotic chromatin organization and transcriptional control, providing a relevant system to dissect the role of nuclear PKA signaling in leukemia biology and the maintenance of the transformed phenotype.
These polyclonal knockout cells are suited for a wide range of experimental applications, including the study of cAMP/PKA nuclear signaling, analysis of mitotic chromosome condensation, and functional genomics of A-kinase anchoring proteins. Researchers can employ techniques such as immunofluorescence to visualize mitotic chromosome defects, phospho-PKA substrate detection to assess signaling output, RT-qPCR to quantify CREB target gene expression, flow cytometry for cell cycle profiling, and co-immunoprecipitation to examine PKA-RII?? interactions. RNA-seq and drug screening campaigns targeting PKA-anchoring interactions can be conducted to evaluate therapeutic vulnerabilities. For further information, please contact Ascent Research.
