The HSPBP1 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population derived from the Jurkat T-lymphocyte line, with targeted disruption of the HSPBP1 gene. This loss-of-function model provides a heterogeneous pool of cells for studying the consequences of HSPBP1 ablation without clonal selection, enabling robust functional analyses in a relevant T-cell context. The knockout was achieved via CRISPR/Cas9-mediated gene disruption, generating a polyclonal cell population that retains genetic diversity while allowing investigation of HSPBP1-dependent phenotypes through standard molecular and cellular assays.
The Jurkat host cell line is an immortalized T-lymphocyte line originally isolated from a 14-year-old male with acute T-cell leukemia. It is widely utilized as a model system for T-cell signaling, apoptosis, and leukemogenesis. Jurkat cells grow in suspension, simplifying culture maintenance and enabling scalable experimental designs. Their well-defined signaling architectures and responsiveness to stress stimuli make this line a standard choice for dissecting the molecular underpinnings of T-cell survival and death.
HSPBP1 encodes a nucleotide exchange factor that inhibits the ATPase activity of HSP70 and HSP90 chaperones, acting as a key co-chaperone in protein quality control. Its expression is upregulated by HSF1 under conditions of heat shock and oxidative stress. HSPBP1 physically interacts with HSPA1A (HSP70), HSP90, and CDC37, modulating chaperone cycles that control client protein folding and stability. Downstream, loss of HSPBP1 leads to deregulated chaperone activity, promoting cytochrome c release and caspase-3-mediated apoptosis, with BCL2 family members serving as critical regulators of the mitochondrial checkpoint.
In Jurkat leukemia cells, HSPBP1 disruption removes the inhibitory constraint on HSP70/HSP90, causing hyperactive chaperone cycling and impaired proteostasis. This renders the polyclonal knockout population highly vulnerable to proteotoxic insults, including heat shock, oxidative stress, and chemotherapeutic agents. The model allows dissection of how HSPBP1 coordinates chaperone function to safeguard T-cell viability, providing a system to probe the interplay between chaperone networks and apoptotic pathways in a heterogeneous cell background that mirrors natural variability.
This knockout cell product is designed for applications such as investigating chaperone-mediated control of T-cell apoptosis, evaluating HSP70/HSP90 inhibitors in leukemia, and validating heat shock protein modulators as drug targets. Standard assays include Western blotting, flow cytometry for apoptosis markers, RT-qPCR for gene expression analysis, co-immunoprecipitation to assess protein interactions, and cell viability assays under stress conditions. The polyclonal format avoids clonal selection bias, making it ideal for functional genomics screens and pharmacological studies. For additional information, please contact Ascent Research.
