The AAK1 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Jurkat T lymphocyte line. This product features targeted disruption of the AAK1 gene, which encodes adaptor-associated kinase 1, a serine/threonine kinase pivotal for clathrin-mediated endocytosis. The heterogeneous pool of edited cells provides a powerful loss-of-function model to interrogate AAK1-dependent processes without clonal selection, preserving population-level diversity and enabling robust functional comparisons in a human T cell background.
Jurkat cells are an immortalized human T lymphocyte line originally isolated from the peripheral blood of a 14-year-old male with acute T cell leukemia. These cells serve as a widely employed model for T cell signaling, apoptosis, and leukemogenesis, owing to their capacity to recapitulate antigen receptor-mediated pathways and their facile genetic manipulation. In the context of AAK1 disruption, Jurkat cells offer a relevant host for examining endocytic trafficking of surface receptors that govern lymphocyte activation, proliferation, and survival, making them an ideal system for dissecting the intersection of membrane dynamics and immune signaling.
AAK1 functions as a key upstream kinase in clathrin-dependent internalization by directly phosphorylating the mu2 subunit (AP2M1) of the AP-2 adaptor complex. This modification promotes maturation of clathrin-coated pits and subsequent scission by dynamin, leading to Rab5-mediated early endosome delivery. AAK1 activity is regulated by EGFR, Notch receptors, and WNT ligands, positioning it at the nexus of multiple signaling cascades. Downstream, AAK1 interacts with components including AP-2 subunits (AP2A1, AP2B1, AP2S1), clathrin triskelia, Eps15, and amphiphysin. Knockout of AAK1 thus disrupts the phosphorylation-dependent progression of endocytosis, impairing internalization of key cargoes such as EGFR and Notch1, and thereby attenuating downstream signal transduction.
In Jurkat T cells, loss of AAK1-mediated endocytic regulation directly impacts receptor trafficking critical for T cell receptor and Notch signaling, which are frequently dysregulated in T cell leukemias. This knockout model therefore enables investigation of how clathrin-mediated internalization influences leukemogenic pathways, cytokine responsiveness, and immune synapse formation. Moreover, because AAK1 is implicated in neurodegenerative disorders and viral entry, the Jurkat background provides a tractable platform for extending these studies into neuroinflammation and host?Cpathogen interactions in a human cell system.
Research applications for these polyclonal knockout cells span oncology, neurobiology, and infectious disease. They are suited for validating AAK1 as a drug target in high-throughput kinase inhibitor screens, and for mechanistic studies using transferrin uptake assays, EGFR internalization kinetics, and flow cytometric quantification of surface receptor levels. Notch reporter assays and immunofluorescence visualization of clathrin-coated pits further enable dissection of signaling output and endocytic machinery organization. Western blotting for AAK1 and phospho-AP2M1 provides direct readouts of pathway activity. For technical inquiries or ordering information, please contact Ascent Research.
