The HOOK3 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt expression of the HOOK3 gene in the Jurkat human T lymphocyte line. This polyclonal product consists of a heterogeneous pool of cells harboring gene disruptions, providing a robust model for studying HOOK3 function without clonal selection. The knockout model enables loss-of-function studies in an easily manipulated suspension cell system.
Jurkat cells are an immortalized human T lymphocyte line derived from an acute T cell leukemia patient. They serve as a widely used model for T cell signaling, including T cell receptor (TCR) activation, signal transduction, and immune synapse assembly. Their leukemic origin also makes them relevant for leukemia biology and drug screening. The Jurkat background offers a well-characterized platform for investigating molecular mechanisms.
HOOK3 encodes a microtubule-binding adaptor protein that acts as a critical linker between cargo-associated Rab GTPases and the dynein-dynactin motor complex. HOOK3 specifically interacts with Rab5, Rab7, and Rab9, facilitating the retrograde transport of endosomes and lysosomes along microtubules. It forms complexes with dynein heavy chain and dynactin p150Glued, and is regulated by cell cycle kinases. Through these interactions, HOOK3 governs endosomal maturation, Golgi organization, and autophagic flux, positioning it at the nexus of intracellular trafficking pathways.
In Jurkat T cells, HOOK3-mediated vesicle transport is essential for the spatial regulation of TCR recycling and immune synapse formation. Disruption of HOOK3 can therefore impair the delivery of signaling components to the immune synapse, alter endosomal distribution, and potentially affect leukemic cell migration. This polyclonal knockout model enables researchers to dissect the contribution of HOOK3 to dynein-dependent processes in a T cell context, offering insights into both normal lymphocyte biology and leukemia pathophysiology.
Typical applications include analysis of dynein-mediated retrograde transport, endosomal trafficking dynamics, and microtubule motor function. The polyclonal population is suitable for Western blotting to confirm HOOK3 disruption, immunofluorescence staining of endosomal markers such as Rab5 and LAMP1, live-cell imaging of vesicle movement, flow cytometric measurement of TCR surface expression, co-immunoprecipitation of HOOK3 with dynein components, and functional assays for cell migration. Additionally, these cells can be utilized for transcriptomic profiling by RNA-seq to identify pathways altered upon HOOK3 loss. For further information, please contact Ascent Research.
