DOCK5 Knockout HEK293T Polyclonal Cells are a human embryonic kidney cell population edited by CRISPR/Cas9 to disrupt the DOCK5 gene, generating a heterogeneous pool of loss-of-function variants. This polyclonal format provides a practical model for studying collective effects of DOCK5 disruption on cellular processes, offering experimental robustness by avoiding clonal artifacts and enabling rapid functional screening in a widely used host background.
HEK293T cells are an immortalized human embryonic kidney epithelial cell line that stably expresses the SV40 large T-antigen. This feature enables episomal replication of plasmids containing the SV40 origin of replication, facilitating high-level transient protein expression and efficient lentivirus production. The cell line is extensively employed in molecular and cellular biology for signal transduction research and is suitable for examining cell adhesion, migration, and cytoskeletal organization.
DOCK5 encodes a guanine nucleotide exchange factor (GEF) that specifically activates the small GTPases Rac1 and Cdc42 by catalyzing the exchange of GDP for GTP. Once activated, Rac1 and Cdc42 orchestrate actin cytoskeletal reorganization, leading to lamellipodia and filopodia formation, thereby regulating cell adhesion and migration. DOCK5 functions in a complex with ELMO proteins (ELMO1 and ELMO2) and is recruited to the plasma membrane by upstream signals from receptor tyrosine kinases (such as PDGFR and EGFR), integrins, and Src family kinases, often via PI3K. Downstream, DOCK5-mediated activation of Rac1/Cdc42 triggers a cascade involving PAK1, LIM kinase (LIMK1), and cofilin, modulating actin filament dynamics. Rac1/Cdc42 also stimulate the WAVE and Arp2/3 complexes to drive lamellipodial protrusions.
In the HEK293T background, disruption of DOCK5 is expected to impair the GEF activity toward Rac1 and Cdc42, leading to attenuated actin polymerization and defective lamellipodia/filopodia formation. This model allows researchers to dissect the specific contribution of DOCK5 to integrin-dependent adhesion, growth factor?Cinduced migration, and cytoskeletal dynamics without the confounding effects of small molecule inhibitors or dominant-negative constructs. The polyclonal population may exhibit a range of knockdown efficiencies, providing a graded loss-of-function phenotype useful for correlating residual protein levels with functional outcomes. Because HEK293T cells endogenously express many components of the Rac1/Cdc42 signaling axes, this knockout model serves as a physiologically relevant platform for mechanistic studies.
Researchers can employ DOCK5 Knockout HEK293T Polyclonal Cells in a variety of assays to investigate cellular migration and invasion mechanisms. For instance, wound healing and Transwell migration assays quantify the loss of directional motility, while Rac1/Cdc42 GTPase pull-downs directly measure the reduction in active GTP-bound small GTPases. Phalloidin staining and immunofluorescence for focal adhesion markers (e.g., vinculin, paxillin) reveal cytoskeletal defects and adhesion complex dynamics. Downstream signaling can be assessed by phospho-PAK1 Western blotting, and gene expression changes by RT-qPCR. These cells are ideal for screening anti-metastatic compounds, validating DOCK5 as a therapeutic target in cancer metastasis, and studying immune dysregulation. For further information or customization, contact Ascent Research.
