GOLPH3L Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population designed to disrupt the GOLPH3L gene in human Jurkat T lymphocytes. This mixed edited-cell pool provides a versatile loss-of-function model for investigating GOLPH3L-dependent processes in Golgi dynamics, vesicle trafficking, and signal transduction. The polyclonal format supports pooled screening approaches and bulk functional studies where heterogeneous knockout backgrounds are advantageous.
Jurkat cells are an IL-2-independent immortalized T-cell line derived from an acute lymphoblastic leukemia patient. They exhibit constitutive NF-??B activity and elevated mTOR signaling, characteristics that underpin robust proliferation and survival. As a suspension cell model, Jurkat is extensively used to study T-cell receptor trafficking, immunological synapse formation, and secretory pathways, all of which rely on a functional Golgi apparatus. The background also facilitates exploration of Golgi-lysosomal crosstalk and metabolic regulation.
GOLPH3L localizes to the trans-Golgi network, where it interacts with phosphatidylinositol-4-phosphate (PI(4)P) and the myosin motor MYO18A, tethering Golgi membranes to the actin cytoskeleton. This complex drives vesicle scission and maintains Golgi morphology. GOLPH3L operates downstream of PI3K/AKT and Ras signaling and is transcriptionally regulated by MYC. The GOLPH3L/PI(4)P/MYO18A/actin axis is critical for secretory cargo trafficking and Golgi compactness. Additionally, GOLPH3L has been implicated in mTOR activation by promoting mTOR recruitment to lysosomes, likely through trafficking of regulatory components. Beyond MYO18A, GOLPH3L interacts with ACTN1, COPI, and ARF1, linking it to broader vesicular transport networks. Consequently, GOLPH3L knockout disrupts Golgi-cytoskeletal linkage, impairs secretory flux, and alters mTOR lysosomal localization, with downstream effects on actin regulators such as RAC1.
In the Jurkat T-cell context, GOLPH3L knockout provides insight into how Golgi architecture influences immune function. T lymphocytes demand rapid, polarized secretion of cytokines and cytolytic granules, processes necessitating dynamic Golgi reorganization and vesicle trafficking. GOLPH3L-mediated actin tethering may be essential for proper surface display of T-cell receptors and other activation markers. Because Jurkat cells exhibit elevated mTOR activity, this model helps dissect GOLPH3L??s role in mTOR-dependent proliferation and metabolic reprogramming in T-cell leukemia, and may reveal vulnerabilities related to drug resistance.
Typical applications for these polyclonal knockout cells include immunofluorescence analysis of Golgi morphology using organelle and actin markers, Brefeldin A trafficking assays, and ELISA-based quantification of secretory cargo. mTOR pathway activation can be assessed via phospho-S6K immunoblotting, while flow cytometry quantifies surface protein secretion. Western blotting confirms GOLPH3L loss and monitors downstream targets such as MYO18A and phospho-mTOR. Additional uses encompass secretory pathway modulator screening, investigation of exosome biology, and drug sensitivity profiling in a T-cell leukemia model with disrupted secretion. For more information, please contact Ascent Research.
