HCLS1 Knockout Jurkat Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population in which the HCLS1 gene has been disrupted using targeted Cas9 nucleases. The polyclonal format consists of a heterogeneous pool of edited cells carrying diverse loss-of-function alleles at the HCLS1 locus, providing a robust model for studying gene function without clonal artifacts. This product is designed for researchers investigating T?cell receptor (TCR) signaling, cytoskeletal dynamics, and malignant transformation.
The host Jurkat cell line is an immortalized human T?lymphocyte line originally derived from the peripheral blood of a 14?year?old boy with acute T?cell leukemia. Jurkat cells are widely used as a model system for TCR?mediated signal transduction, leukemia biology, and T?cell activation owing to their well?characterized signaling machinery and ease of genetic manipulation. Their leukemic origin also makes them particularly relevant for studying oncogenic signaling pathways.
HCLS1 encodes the hematopoietic lineage cell?specific protein HS1, a key adaptor protein that links immune receptor engagement to cytoskeletal reorganization. Upon TCR stimulation, HS1 is phosphorylated by upstream kinases Lyn and Syk, enabling recruitment of the guanine nucleotide exchange factor Vav1 and the adaptor Nck. This complex activates the Arp2/3 complex, which drives actin branching and polymerization, thereby facilitating immune synapse formation, cell spreading, and migration. HS1 also interacts with HAX?1 and participates in chemokine and B?cell receptor pathways, making it a central node in immune signaling.
In the Jurkat T?cell context, disruption of HCLS1 abrogates HS1?dependent actin remodeling and impairs downstream functional responses, including TCR?induced activation, adhesion, and migratory capacity. This knockout model enables dissection of the specific contribution of HS1 to leukemic T?cell signaling and may reveal vulnerabilities exploitable for therapeutic intervention. The polyclonal nature of the population mirrors the heterogeneity observed in tumor samples, enhancing translational relevance.
Typical applications include mechanistic studies of immune signaling, anti?leukemic drug screening, kinase inhibitor profiling, and functional genomics. Representative assays with these cells include western blotting to assess HS1 phosphorylation and downstream effector activation, flow cytometry for TCR?induced surface markers, transwell migration and invasion assays, co?immunoprecipitation to map HS1 interaction networks, and confocal microscopy to visualize actin cytoskeleton reorganization. For technical inquiries and ordering information, please contact Ascent Research.
