The DOCK7 Knockout Jurkat Polyclonal Cells product consists of a population of human Jurkat T lymphocytes subjected to CRISPR/Cas9-mediated disruption of the DOCK7 gene, generating a polyclonal knockout pool. This loss-of-function model allows researchers to interrogate DOCK7-dependent cellular processes without the confounding influence of wild-type protein expression. The polyclonal format provides a robust sample for biochemical and functional assays, retaining natural heterogeneity while ensuring sufficient knockout representation for statistically significant observations.
The host cell line, Jurkat, is an immortalized T lymphocyte line originally derived from the peripheral blood of a 14-year-old male with acute T cell leukemia. Jurkat cells have been extensively characterized as a model system for T cell receptor (TCR) signaling, apoptosis, and immune synapse formation. Their rapid growth, suspension culture characteristics, and well-defined signaling networks make them an ideal platform for investigating the molecular mechanisms governing T cell function and cytoskeletal reorganization.
DOCK7 encodes a guanine nucleotide exchange factor (GEF) for the Rho GTPases Rac1 and Cdc42. Upon activation by upstream signals, including integrin engagement, ErbB2 receptor tyrosine kinase, and ELMO1/2-containing complexes, DOCK7 catalyzes the exchange of GDP for GTP on Rac1 and Cdc42. This nucleotide exchange triggers a cascade of downstream events involving phosphorylation of PAK1, activation of the WAVE regulatory complex, and subsequent stimulation of the Arp2/3 complex to promote actin filament nucleation and branching. Concurrently, DOCK7-mediated signaling influences the LIMK-cofilin pathway, modulating actin depolymerization and turnover. DOCK7 also interacts with the tumor suppressor TSC1, linking it to additional regulatory networks. Collectively, DOCK7 orchestrates cytoskeletal dynamics critical for cell migration, polarity establishment, and the structural organization of the immune synapse.
In Jurkat T cells, DOCK7 is pivotal for actin remodeling during immunological synapse assembly and TCR signaling. Knockout of DOCK7 impairs Rac1 and Cdc42 activation, leading to defective F-actin polymerization, reduced PAK1 phosphorylation, and diminished T cell activation markers such as IL-2 and CD69. Consequently, this model is valuable for dissecting DOCK7-dependent actin dynamics in T cell function and their relevance to T cell-mediated pathologies.
This polyclonal knockout population is suitable for a range of applications, including T cell activation studies, immune synapse visualization by immunofluorescence, and transwell migration assays. Researchers can employ phospho-PAK1 Western blotting and flow cytometric F-actin quantification to monitor downstream signaling. Co-immunoprecipitation can be used to examine DOCK7-ELMO1/2 or DOCK7-TSC1 interactions, while Rho GTPase activation assays (G-LISA) directly measure Rac1 and Cdc42 activity. RT-qPCR can assess effector gene expression. The model also supports neurodevelopmental disorder research linked to DOCK7 mutations. For additional technical information, please contact Ascent Research.
