The DNAJC5 Knockout HeLa Polyclonal Cells are a heterogeneous population of HeLa cells engineered using CRISPR/Cas9 to disrupt the DNAJC5 gene, which encodes the co-chaperone cysteine string protein alpha (CSP??). This polyclonal knockout pool provides a genetically diverse loss-of-function model, avoiding clonal selection and thereby enabling robust studies of DNAJC5 function across a spectrum of mutations. The preparation is suitable for researchers investigating the molecular roles of CSP?? in cellular proteostasis and synaptic-like mechanisms, even in non-neuronal contexts.
HeLa cells, derived from a human cervical epithelial adenocarcinoma, are an immortalized cell line extensively used in cancer biology, cell cycle analysis, and gene expression studies. Their robust growth characteristics and well-characterized signaling networks make them an ideal host for dissecting fundamental cellular processes. While HeLa cells do not form conventional synapses, they retain core machinery for exocytosis and protein quality control, providing a valuable platform for examining conserved aspects of CSP?? function outside the central nervous system.
DNAJC5 encodes CSP??, a synaptic vesicle-associated co-chaperone that critically regulates neurotransmitter release by interacting with the heat shock cognate 70 (Hsc70) chaperone system. CSP?? facilitates the disassembly and recycling of the SNARE complex, which includes SNAP-25, Syntaxin, and Synaptobrevin, ensuring efficient vesicle priming and fusion. Additionally, CSP?? acts as a neuroprotective factor by preventing ??-synuclein aggregation through its chaperone activity. Its downstream effects on SNARE complex dynamics and protein homeostasis are central to synaptic function, and its loss leads to impaired exocytosis and accumulation of misfolded proteins.
In the host HeLa cell context, knockout of DNAJC5 allows for dissection of CSP??’s chaperone functions independent of neuronal-specific synaptic structures. This model is particularly valuable for studying general proteostasis mechanisms, as HeLa cells exhibit robust protein quality control pathways. The polyclonal knockout population can be used to investigate how CSP?? deficiency influences SNARE complex stability, interacts with Hsc70 and SGT (small glutamine-rich tetratricopeptide repeat-containing protein alpha), and affects cellular responses to proteotoxic stress. These studies are relevant to understanding the pathogenesis of adult-onset neuronal ceroid lipofuscinosis (Kufs disease), where mutations in DNAJC5 lead to neurodegeneration through protein aggregation.
Researchers can employ the DNAJC5 Knockout HeLa Polyclonal Cells in a variety of functional assays, including co-immunoprecipitation to assess CSP??-Hsc70-SNARE interactions, Western blotting to quantify protein levels, and proteostasis reporter assays to monitor aggregation propensity. The cells are also suited for cell viability assays under proteotoxic stress and for screening small-molecule modulators of chaperone activity. By utilizing this knockout model, scientists can advance their understanding of chaperone-mediated SNARE regulation and its implications in neurodegenerative diseases. For additional technical details or ordering information, please contact Ascent Research.
