The DZIP1 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout population designed for the functional analysis of the DZIP1 gene in a human cellular context. This loss-of-function model is generated by CRISPR/Cas9-mediated gene disruption, yielding a heterogeneous pool of DZIP1-null HEK293T cells suitable for investigating the gene’s diverse biological roles. The polyclonal format offers a robust tool for population-level studies without requiring single-cell clonal isolation, enabling efficient interrogation of DZIP1-dependent mechanisms across a mixed knockout background.
HEK293T cells are a widely used human embryonic kidney epithelial cell line that constitutively expresses the SV40 large T antigen, which facilitates high-level transient protein expression and replication of plasmids containing the SV40 origin of replication. These adherent cells are a cornerstone of biomedical research, particularly valued for viral vector production, protein overexpression, and cell signaling studies. The HEK293T background provides a versatile platform for introducing genetic modifications and performing downstream biochemical and imaging assays, making it an ideal host for CRISPR/Cas9-mediated knockout models.
DZIP1 encodes a centrosomal and basal body protein that is indispensable for primary cilium assembly and Hedgehog signal transduction. The protein localizes to the centrosome and forms complexes with interaction partners such as DAZ protein, CEP290, and various RNA-binding proteins. Upstream regulators include RFX transcription factors, GLI transcription factors, and cell cycle regulators, while downstream effectors comprise GLI1, PTCH1, and IFT88. Mechanistically, DZIP1 is required for the structural integrity of the primary cilium; its loss disrupts cilium formation, thereby attenuating the Hedgehog pathway. This leads to impaired processing of GLI transcription factors, which normally mediate transcriptional activation of target genes in response to SHH ligand binding to PTCH1 and subsequent SMO activation.
In the HEK293T host cell context, the DZIP1 knockout offers a valuable system for dissecting gene function. Although HEK293T cells are not constitutively ciliated, they retain the capacity to form primary cilia under serum deprivation conditions, making this model suitable for inducible ciliogenesis studies. The ablation of DZIP1 thus enables researchers to explore its role in centrosome biology, RNA processing, and Hedgehog signaling independently of cilia, while also providing a means to couple the knockout with transient expression of wild-type or mutant DZIP1 variants for structure-function analyses. This cellular model bridges the gap between simple overexpression systems and more complex physiological systems.
Typical research applications leveraging this knockout cell population include functional dissection of the Hedgehog signaling pathway using Gli-luciferase reporter assays, high-content immunofluorescence microscopy to visualize primary cilia with acetylated tubulin staining, and quantitative RT-qPCR profiling of Hedgehog target genes such as GLI1 and PTCH1. Additional assays encompass Western blotting for full-length and repressor GLI protein forms, cell cycle analysis to assess proliferation effects, and co-immunoprecipitation to map protein interaction networks involving centrosomal and RNA-binding partners. This model is also applicable to ciliopathy disease modeling studies, centrosome biology investigations, and the analysis of RNA splicing regulation. For further technical details and customization options, please contact Ascent Research.
