The EEA1 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Jurkat human T lymphocyte line, providing loss of EEA1 function. This polyclonal model offers heterogeneous gene disruption, enabling robust functional studies without clonal selection bias. Disruption of EEA1 via CRISPR/Cas9 creates a versatile system to investigate endosomal trafficking and associated signaling in an immune cell context.
The Jurkat host cell line is an immortalized human T lymphocyte line derived from an acute T cell leukemia patient. Extensively used in immunology and cancer research, Jurkat cells provide a well-characterized model for T cell receptor (TCR) signaling, endocytosis, and leukemogenesis. Their rapid growth and genetic accessibility make them ideally suited for CRISPR-based genome editing. Since T cell function relies on receptor internalization and signal termination, this background enables physiologically relevant interrogation of EEA1-dependent endosomal regulation.
EEA1 functions as an endosomal tethering factor that binds phosphatidylinositol 3-phosphate (PI3P) through its FYVE domain, mediating homotypic fusion of early endosomes. It operates downstream of Rab5 and the PI3K complex composed of PIK3C3 (hVps34) and BECN1. EEA1 interacts with RAB22, RABAPTIN-5, syntaxin 13, and calmodulin to coordinate endosome docking. By facilitating EGFR trafficking toward lysosomal degradation, EEA1 attenuates downstream PI3K/AKT signaling. Additionally, EEA1 participates in autophagosome formation, linking endocytic and autophagic pathways.
In Jurkat T lymphocytes, EEA1 knockout is particularly significant for studying endosomal contributions to immune receptor dynamics. EEA1-dependent early endosome fusion influences surface expression and degradation of receptors such as EGFR, often dysregulated in leukemia. Disruption of EEA1 may alter receptor recycling versus degradation, impacting signal intensity and duration via PI3K/AKT. Moreover, Jurkat cells model T cell activation, where endosomal sorting shapes immunological synapse composition and TCR signal termination. This model thus permits examination of how endosomal tethering defects affect lymphocyte biology and oncogenic signaling.
Applications include endocytosis kinetics (e.g., transferrin uptake), EGFR degradation studies, autophagic flux analysis, and phospho-signaling profiling. Typical methods employ Western blotting for EEA1 and EGFR pathway proteins, immunofluorescence for endosome morphology, co-immunoprecipitation to detect interactors, flow cytometry for receptor surface levels, and confocal microscopy. The polyclonal format also supports pooled CRISPR screens. For further details or custom requests, please contact Ascent Research.
