The ARL8B Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human embryonic kidney HEK293T cell line, designed for targeted disruption of the ARL8B gene. This polyclonal format provides a genetically heterogeneous pool of cells carrying CRISPR/Cas9-mediated disruptions in ARL8B, enabling loss-of-function studies without clonal isolation. The product is well-suited for investigating ARL8B-dependent lysosomal positioning, autophagy, and related signaling pathways in a robust and widely used host cell background.
The HEK293T host cell line is a well-established derivative of HEK293, which originates from human embryonic kidney epithelium. This cell line stably expresses the SV40 large T antigen, permitting episomal replication of plasmids containing the SV40 origin of replication and yielding high transfection efficiency. HEK293T cells are a standard model in cell biology for studying intracellular trafficking, signal transduction, and protein interaction networks, offering ease of genetic manipulation and consistent growth characteristics.
ARL8B encodes a small lysosomal GTPase that acts as a central regulator of lysosome positioning and motility. Activated by the BORC complex, ARL8B recruits the effector protein SKIP (PLEKHM2) to lysosomal membranes, coupling these organelles to kinesin-1 (KIF5B) motor proteins for anterograde transport along microtubules. This mechanism is critical for the peripheral distribution of lysosomes and is under the control of upstream regulators including RAB7, mTORC1, and amino acid sensing. ARL8B interacts with the HOPS complex component VPS41, bridging lysosomes to the trafficking machinery, and influences downstream pathways such as mTORC1 activation, autophagic flux, and cell migration via lysosome spatial organization.
In the HEK293T cellular context, ARL8B disruption provides a valuable model for dissecting lysosomal trafficking dynamics. Given the embryonic kidney origin of HEK293T, this knockout cell population is particularly relevant for examining how lysosome positioning affects epithelial cell functions, including nutrient sensing and stress responses. The loss of ARL8B function can impact mTORC1 signaling at the lysosomal surface, disrupt autophagy completion, and alter cell motility, all of which are processes implicated in cancer metastasis, neurodegenerative disorders, and lysosomal storage diseases.
Researchers can employ this knockout model for a variety of experimental applications, such as monitoring lysosomal distribution by immunofluorescence, quantifying lysosomal motility through live-cell imaging, and assessing mTORC1 activity via phospho-S6K western blotting. Additional uses include co-immunoprecipitation to map ARL8B effector interactions, RT-qPCR or RNA-seq for transcriptomic analysis of autophagy-related genes, and cell migration/invasion assays to study lysosome-dependent motility. The ARL8B Knockout HEK293T Polyclonal Cells facilitate targeted investigation of lysosomal positioning networks and provide a platform for drug discovery efforts aimed at modulating lysosome dynamics. For further details, please contact Ascent Research.
