The DNAJA1 Knockout HeLa Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to disrupt the DNAJA1 gene in HeLa cells. This product provides a heterogeneous pool of edited cells, enabling researchers to study the functional consequences of DNAJA1 loss in a human cervical adenocarcinoma background. The knockout is generated by CRISPR/Cas9-mediated gene disruption, offering a robust loss-of-function model for investigating DNAJA1-dependent processes without relying on transient suppression methods.
The parental HeLa cell line is a well-characterized epithelial cell line derived from human cervical adenocarcinoma. HeLa cells are a standard model in cancer biology, virology, and protein homeostasis research due to their rapid growth, ease of transfection, and susceptibility to various cellular stresses. Their use as a host for DNAJA1 knockout leverages these advantages, allowing detailed analysis of protein quality control, mitochondrial function, and stress responses in a cancer-relevant context.
DNAJA1 encodes a type I Hsp40 co-chaperone that binds unfolded proteins and stimulates the ATPase activity of Hsp70 (HSPA1A), a central activity in protein quality control. DNAJA1 directs Hsp70 clients towards specific fates: facilitating folding, promoting mitochondrial translocation, or mediating ubiquitin-dependent degradation. This functional versatility is governed by interactions with cofactors including BAG3, the ubiquitin ligase STUB1 (CHIP), and another J-protein, DNAJB1. The DNAJA1-Hsp70 network is activated by upstream regulators such as heat shock transcription factor 1 (HSF1) in response to heat shock and oxidative stress, integrating stress signals with proteostasis maintenance. HSP90AA1 is also a representative component of this extended chaperone system, highlighting the interconnected nature of cellular protein folding pathways.
In HeLa cells, DNAJA1 knockout disrupts critical proteostasis nodes. Cancer cells like HeLa exhibit elevated protein synthesis and heightened stress, making them dependent on efficient chaperone systems. Loss of DNAJA1 compromises Hsp70-driven folding, mitochondrial precursor protein import, and endoplasmic reticulum-associated degradation (ERAD), potentially leading to proteotoxic stress and altered cell survival. This model thus serves as a platform to dissect how cochaperone specificity influences cancer cell adaptation to stress, and to explore how DNAJA1 modulates pathways implicated in neurodegeneration, where protein aggregation is a hallmark, or in viral infections that hijack chaperone machinery.
Researchers can employ this knockout population in a variety of assays to study protein homeostasis. Western blotting can assess changes in Hsp70 activity and client protein expression, while co-immunoprecipitation permits mapping of altered Hsp70-containing complexes. Protein aggregation assays and mitochondrial import measurements directly evaluate the functional consequences of DNAJA1 loss. Additionally, cell viability and apoptosis assays can reveal the role of DNAJA1 in stress resistance, making these cells suitable for drug target validation studies in cancer and neurodegenerative disease. For more information about this product, please contact Ascent Research.
