The GSE1 Knockout HEK293T Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal population harboring targeted disruption of the GSE1 gene. This loss-of-function model supports investigation of GSE1-dependent processes in HEK293T cells. The polyclonal pool reflects heterogeneous editing, reducing clonal bias. It is suitable for mitotic phenotyping, cell cycle analysis, and proliferation studies, offering a robust tool for spindle assembly research.
The HEK293T parental line is a human embryonic kidney epithelial derivative stably expressing SV40 large T antigen, enabling high-efficiency transfection and episomal replication of SV40 origin plasmids. Widely used for recombinant expression and lentiviral packaging, these cells exhibit robust growth and genetic tractability, making them an ideal host for knockout models of fundamental processes such as mitosis.
GSE1 encodes an augmin complex regulatory subunit essential for Ran-dependent spindle assembly and chromosome segregation. It scaffolds HAUS subunits (HAUS1?C8) and recruits ??-tubulin ring complex via NEDD1 for microtubule nucleation on spindle microtubules. Cell cycle?Cregulated phosphorylation by CDK1, Plk1, and Aurora A kinase controls its activity during G2/M. GSE1-dependent nucleation ensures kinetochore?Cmicrotubule attachment, chromosome congression, and spindle integrity. Disruption abrogates augmin-mediated amplification, causing mitotic defects, misalignment, and aneuploidy??phenotypes linked to cancer proliferation and microcephaly.
In HEK293T cells, GSE1 knockout provides a sensitive system for probing mitotic spindle requirements due to the near-tetraploid karyotype and rapid division, which demand efficient nucleation. This model facilitates studying upstream kinase regulation (CDK1, Aurora A), mapping HAUS complex interfaces, or screening for compounds that bypass augmin function. It also enables quantitative analyses of chromosome missegregation and aneuploidy in a genetically tractable background.
Key applications include high-content live-cell imaging of mitosis, immunofluorescence staining for ??- and ??-tubulin, flow cytometric cell cycle profiling, and clonogenic survival assays. The polyclonal pool supports karyotyping, kinetochore attachment studies, and siRNA or small-molecule epistasis experiments. It is well suited for high-throughput screens to identify mitotic inhibitors with synthetic lethality in GSE1-deficient cells, informing cancer therapy strategies. For further information, including custom modifications, contact Ascent Research.
