KIF2A Knockout HAP1 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population specifically designed to disrupt the KIF2A gene in the well-characterized HAP1 human near-haploid cell line. This genetically engineered cellular model provides a powerful loss-of-function system for investigating the biological roles of KIF2A, a kinesin-13 family ATP-dependent microtubule depolymerase. The polyclonal nature of this knockout population reflects a heterogeneous pool of edited cells, enabling robust and reproducible functional studies without the need for single-cell clonal isolation. As a research tool, these cells facilitate detailed analyses of microtubule dynamics, mitotic progression, and chromosome segregation, supporting a broad range of applications in cell biology, cancer research, and neurodevelopmental disease modeling.
The host cell line, HAP1, is a human near-haploid chronic myeloid leukemia-derived cell line originating from the KBM-7 parental line. HAP1 cells are adherent and exhibit a fibroblast-like morphology, with a stable near-haploid karyotype that simplifies the interpretation of genetic perturbations. Their male origin and haploid genomic content make them particularly valuable for high-throughput functional genomics, including CRISPR-based genetic screens, where the presence of a single copy of each gene eliminates the need for biallelic inactivation. In the context of KIF2A knockout, this haploid background ensures that disruption of the single KIF2A allele directly results in a complete loss of protein function, providing a highly tractable system for dissecting gene function.
KIF2A encodes a kinesin-13 protein that functions as an ATP-dependent microtubule depolymerase, critically regulating microtubule dynamics during both mitosis and neuronal development. The enzyme is tightly regulated by upstream factors, including phosphorylation by Aurora A kinase and cyclin-dependent kinase 1 (CDK1), as well as direct microtubule binding. Activated KIF2A localizes to spindle microtubules and kinetochores, where it mediates depolymerization of microtubule ends, thereby controlling spindle assembly, chromosome alignment, and segregation. KIF2A interacts with key mitotic regulators such as TACC3 and CKAP5 (ch-TOG), and associates with the clathrin adaptor AP-2, linking it to broader microtubule-organizing complexes. Within the mitotic signaling network, KIF2A operates downstream of master regulators like AURKA, PLK1, and CDK1, and in concert with TPX2, TACC3, and CKAP5 to ensure faithful cell division. Perturbations in this pathway are implicated in cortical dysplasia, microcephaly, epilepsy, and other neurodevelopmental disorders.
In the HAP1 cellular context, knockout of KIF2A leads to significant mitotic defects, including aberrant spindle morphology, delayed mitotic progression, and compromised chromosome segregation. The near-haploid nature of HAP1 cells amplifies these phenotypes, as the single copy of KIF2A is sufficient to maintain normal microtubule dynamics in wild-type cells. Consequently, the KIF2A polyclonal knockout model offers a sensitized background for studying the molecular consequences of microtubule depolymerase inhibition. This system is particularly advantageous for live-cell imaging of mitosis, as the cells remain amenable to fluorescence-based techniques and genetic manipulation. Researchers can utilize this model to dissect the precise roles of KIF2A in spindle positioning, microtubule flux, and the metaphase-to-anaphase transition, advancing our understanding of cell cycle regulation and its pathological disruptions.
This knockout cell population is ideally suited for a wide range of experimental applications in academic and pharmaceutical research. Key assays include Western blotting to confirm loss of KIF2A protein expression, immunofluorescence microscopy to visualize microtubule and spindle architecture, live-cell imaging to track mitotic progression in real time, and flow cytometry to assess cell cycle distribution and polyploidy. Additionally, microtubule polymerization and depolymerization biochemical assays enable quantitative analysis of microtubule dynamics. These cells support gene function studies, drug target validation, and high-content screening for small-molecule modulators of mitosis. For additional technical information, protocols, or ordering details, please contact Ascent Research.
