ARFGAP3 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population generated from the Jurkat human T lymphocyte line, with targeted disruption of the ARFGAP3 gene. This gene encodes the GTPase-activating protein ARFGAP3, which functions as a key regulator of COPI-mediated retrograde transport. The polyclonal knockout product provides a loss-of-function model for investigating Golgi-to-ER trafficking and associated cellular processes without clonal bias.
The parental Jurkat cell line is derived from the peripheral blood of a 14-year-old male with acute T-cell leukemia and serves as a well-established model for T-cell signaling, activation, and leukemogenesis. These cells recapitulate many aspects of T-lymphocyte biology, including antigen receptor?Cmediated signal transduction, cytokine secretion, and immune synapse formation, making them a relevant host for studying roles of trafficking regulators in lymphocyte function and malignant transformation.
ARFGAP3 is a GTPase-activating protein (GAP) for ARF1, and it stimulates GTP hydrolysis on ARF1 to generate ARF1-GDP. This activity triggers disassembly of the COPI vesicle coat, which is essential for retrograde vesicular transport from the Golgi to the endoplasmic reticulum (ER). ARFGAP3 interacts with COPI subunits, including COPB1 and COPG1, and is functionally linked to the KDEL receptor that retrieves ER-resident proteins from the Golgi. By facilitating COPI coat disassembly and cargo sorting, ARFGAP3 maintains Golgi stack organization and ensures proper secretory pathway flow. Consequently, disruption of ARFGAP3 is predicted to impair Golgi morphology, COPI-dependent trafficking, and the retrograde retrieval of key factors, altering cellular homeostasis.
In Jurkat T cells, the Golgi apparatus and retrograde transport are critically involved in the regulated delivery of receptors and secreted molecules to the plasma membrane, processes that underpin immune synapse formation and signal propagation. ARFGAP3 knockout in this leukemic T-cell background offers a powerful tool to dissect how defects in Golgi-to-ER transport affect T-cell receptor signaling, surface glycosylation patterns, and the secretory pathways required for cytokine release. Moreover, the polyclonal nature of this knockout population permits the study of heterogeneous phenotypes and adaptation mechanisms relevant to cancer cell biology and therapeutic response.
Researchers can employ these cells in a wide array of assays. Immunofluorescence microscopy can reveal changes in Golgi architecture, while fluorescent protein?Ctagged cargoes enable real-time monitoring of vesicle trafficking. Co-immunoprecipitation and western blotting can assess interactions with ARF1, COPB1, COPG1, and other trafficking effectors, and flow cytometry can quantify alterations in surface receptor levels. Retrograde transport assays, RNA sequencing to profile trafficking gene expression, and cell viability or drug sensitivity assays further expand the utility. For further information or assistance, please contact Ascent Research.
