The CCSER1 Polyclonal Knockout HEK293T Cells are a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the human CCSER1 gene in HEK293T embryonic kidney epithelial cells. This heterogeneous pool provides a robust loss-of-function model for investigating CCSER1’s roles in mitosis, chromosome segregation, and tumor suppression. The polyclonal format captures diverse editing events across the population, enabling functional studies without clonal selection while retaining the high transfection efficiency and rapid growth characteristic of the HEK293T background.
HEK293T cells, a derivative of HEK293, stably express the SV40 large T antigen, which facilitates episomal replication of SV40 origin-containing plasmids, thereby greatly enhancing protein expression and viral packaging capabilities. These adherent, human-derived cells are widely employed for transient and stable protein production, lentiviral and retroviral packaging, and mechanistic cell biology studies. Their well-characterized signaling networks and ease of genetic manipulation make them an ideal host for probing gene function in pathways governing cell cycle control and genomic stability.
CCSER1 encodes a coiled-coil serine-rich protein that localizes to the mitotic spindle and is implicated in the regulation of spindle assembly and chromosome segregation fidelity. Mechanistically, CCSER1 interacts with ??/??-tubulin and microtubule-associated proteins, contributing to microtubule dynamics and spindle pole organization. It operates within a mitotic network encompassing PLK1, Aurora kinases, and the cyclin B/CDK1 complex, which are critical for mitotic entry and checkpoint control. Upstream, cell cycle-dependent transcription factors and mitogenic signaling cascades likely regulate CCSER1 expression, while downstream, its loss may dysregulate cyclin-dependent kinases and the chromosome segregation machinery, potentially leading to cohesion defects and aneuploidy. Thus, CCSER1 links spindle mechanics to mitotic checkpoint surveillance.
In the HEK293T cellular context, CRISPR/Cas9-mediated disruption of CCSER1 creates a powerful system for dissecting mitotic spindle regulation and the consequences of chromosome mis-segregation. Researchers can readily assess spindle morphology, mitotic progression, and ploidy changes in a biochemically tractable model. The polyclonal knockout population is particularly suited for pooled functional genomics screens and for capturing heterogeneous cellular responses to checkpoint disruption, mirroring the genetic variability observed in tumor cell populations.
These CCSER1 knockout cells support a broad spectrum of applications in tumor biology, aneuploidy research, and CRISPR validation. Representative experimental workflows include western blotting and RT-qPCR to confirm CCSER1 depletion, immunofluorescence microscopy to visualize spindle defects, flow cytometric analysis of cell cycle profiles and DNA content, and functional assays such as migration, invasion, and apoptosis to evaluate oncogenic phenotypes. Transcriptomic profiling by RNA-seq can further elucidate pathway alterations. This model thus provides a versatile platform for preclinical cancer research and drug discovery targeting mitotic regulators. For detailed product specifications or technical assistance, please contact Ascent Research.
