The AP5Z1 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population in which the AP5Z1 gene has been disrupted via CRISPR/Cas9-mediated gene editing. This product comprises a heterogeneous pool of edited Jurkat cells, providing a loss-of-function model to study the ?? subunit of adaptor protein complex 5 (AP-5) in T lymphocyte biology. The polyclonal format captures diverse editing outcomes, enabling robust phenotypic assessment without clonal bias.
The Jurkat host cell line is an immortalized human T lymphocyte line derived from the peripheral blood of a 14-year-old male with acute T cell leukemia. These cells express the T cell receptor (TCR) and CD3 complex, making them a widely adopted model for investigating T cell signaling, apoptosis, and HIV infection. Their rapid proliferation and well-characterized signaling networks facilitate gene disruption studies, particularly those examining endosomal trafficking and lysosomal function in an immune context.
AP5Z1 encodes the ?? subunit of the heterotetrameric AP-5 complex, which drives retrograde transport of cargo from late endosomes to the trans-Golgi network. The ?? subunit is critical for complex stability, interacting with AP5B1, AP5M1, and AP5S1. AP5Z1 functions with clathrin heavy chain (CLTC) and retromer (VPS35), and is regulated upstream by the small GTPase Rab7A and nutrient-sensing MTORC1. It retrieves the cation-independent mannose-6-phosphate receptor (IGF2R) and sortilin (SORT1); disruption impairs lysosomal enzyme sorting, causing substrate accumulation and defective autophagy, contributing to hereditary spastic paraplegia type 48 (SPG48).
In Jurkat T cells, AP5Z1 knockout provides a powerful platform to dissect the role of AP-5 in a well-characterized immune cell line. T lymphocytes depend on lysosomal degradation for antigen processing, receptor recycling, and metabolic homeostasis; thus, disruption of AP5Z1 can reveal how endosomal sorting errors impact T cell function, including TCR signaling dynamics, autophagy-mediated survival, and cytokine secretion. The polyclonal nature of these cells captures a range of editing events, offering a model that more closely mimics heterogeneous genetic backgrounds.
Researchers can employ these cells with co-immunoprecipitation, immunofluorescence for lysosomal (LAMP1) and autophagic (LC3) markers, LysoTracker flow cytometry to measure lysosomal acidity, and autophagy flux assays using bafilomycin A1. Molecular analyses by RT-qPCR and Western blot confirm target disruption and downstream factor expression, while transmission electron microscopy visualizes ultrastructural changes in endolysosomal compartments. The model is also suited for drug screening campaigns targeting lysosomal storage disorders. For further information, please contact Ascent Research.
