The DNAJC5 Knockout Jurkat Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population in the Jurkat immortalized T lymphocyte cell line. This product provides a robust loss-of-function model for investigating the biological roles of DNAJC5. Through CRISPR/Cas9-mediated gene disruption, the polyclonal cells harbor targeted modifications that ablate DNAJC5 expression, enabling functional studies in a homogeneous cellular background.
The Jurkat cell line, originally derived from the peripheral blood of a 14-year-old boy with acute T cell leukemia, is a widely validated model for T cell signaling, activation, and leukemia biology. These cells are amenable to genetic manipulation and support diverse functional assays, making them an ideal host for studying gene function in immune cell physiology. The Jurkat background permits interrogation of how DNAJC5 knockout impacts T cell receptor-mediated signaling, calcium mobilization, and related pathways.
DNAJC5 encodes cysteine string protein alpha (CSP??), a synaptic vesicle-associated cochaperone for heat shock cognate 70 (Hsc70). CSP?? critically facilitates the assembly and disassembly of SNARE complexes??comprising SNAP-25, syntaxin, and synaptobrevin??that drive synaptic vesicle exocytosis. This chaperone activity also underlies neuroprotective mechanisms against activity-dependent degeneration. DNAJC5 expression is regulated by upstream factors such as calcium signaling, CREB1, and neuronal depolarization. Downstream, CSP?? interacts directly with Hsc70, SNAP-25, syntaxin, and synaptobrevin to promote SNARE complex dynamics, and its loss impairs neurotransmitter release and synaptic function. The protein participates in the synaptic vesicle cycle, protein folding, and chaperone-mediated autophagy pathways.
In Jurkat T cells, CSP?? function extends to the immune system. Although primarily characterized in neurons, the cochaperone activity of CSP?? is conserved across cell types, and Jurkat cells express key components of the SNARE and chaperone machinery. The knockout model enables investigation of CSP????s role in T cell exocytic processes, such as cytokine secretion or immune synapse formation, and its potential involvement in calcium-regulated pathways. This system is valuable for exploring how CSP?? deficiency affects T cell physiology and for drawing mechanistic parallels with neurodegenerative disorders.
Researchers can employ these polyclonal knockout cells in a variety of experimental contexts, including western blotting to confirm protein loss, co-immunoprecipitation to map CSP???CHsc70 interactions, immunofluorescence to assess subcellular localization, and functional assays such as calcium flux or apoptosis measurements. The model is well-suited for dissecting the molecular underpinnings of neuronal ceroid lipofuscinoses, adult-onset autosomal dominant Kufs disease, and broader neurodegenerative mechanisms. For further information, please contact Ascent Research.
