The ATP9A Knockout Jurkat Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the Jurkat human T lymphocyte cell line. This product features disrupted ATP9A gene function, resulting in a loss-of-function model for investigating the role of the phospholipid-transporting ATPase in membrane asymmetry and intracellular trafficking pathways. The polyclonal format provides a heterogeneous pool of gene-edited cells, suitable for pooled population studies without single-cell cloning.
Jurkat cells are an extensively characterized human T lymphocyte line originally established from an acute T cell leukemia patient. They serve as a classical model system for T cell receptor (TCR) signaling, apoptosis, and adaptive immune responses, including antigen recognition and cytokine production. The immortalized nature and robust growth characteristics of Jurkat cells make them a convenient platform for genetic manipulation and functional assays in immunology.
ATP9A encodes a P4-type ATPase that functions as a putative phospholipid flippase, translocating phospholipids across membrane bilayers to maintain phospholipid asymmetry. It is predicted to interact with CDC50 family accessory proteins, which are essential for the transport and proper activity of P4-ATPases. Disruption of ATP9A is expected to compromise flippase activity, leading to exposure of phosphatidylserine and other phospholipids on the outer leaflet of cellular membranes. This loss of membrane asymmetry specifically affects endosomal and lysosomal compartments, impairing endocytosis, endosomal sorting, and lysosomal degradation pathways. The resulting trafficking defects can influence key signaling cascades, including the PI3K/AKT pathway, which is critical for T cell activation, survival, and proliferation. Thus, ATP9A serves as a node linking lipid transport to immunoreceptor signal transduction.
In the Jurkat T lymphocyte model, loss of ATP9A disrupts the homeostatic regulation of membrane lipid distribution, which is tightly linked to TCR signaling platforms. Altered membrane asymmetry can modulate the clustering of receptors and downstream adaptors within microdomains, potentially attenuating signal initiation. Endosomal trafficking defects may further perturb the fate of activated receptors and the spatiotemporal control of signaling complexes, thereby altering downstream events such as calcium mobilization, MAPK and AKT phosphorylation, and cytokine secretion. Consequently, this knockout model provides a unique tool for dissecting how phospholipid transport at intracellular membranes governs adaptive immune cell function.
This polyclonal knockout cell product is suitable for a range of functional studies, including flow cytometric detection of phosphatidylserine externalization using annexin V staining, which directly monitors flippase activity. Endocytosis and endosomal trafficking assays can be performed to assess the kinetics of cargo internalization and fate, while western blotting enables analysis of phospho-AKT and other signaling nodes to evaluate the impact on the PI3K/AKT pathway. Calcium flux measurements and multiplex cytokine secretion profiling can further characterize defects in T cell activation. These cells therefore support investigations into the role of phospholipid transport in immune cell signaling, membrane trafficking dynamics, and endolysosomal biology. For further information and technical support, please contact Ascent Research.
