DNAJC16 Knockout NCI-H1299 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population offering a physiologically relevant model for investigating DNAJC16 function in endoplasmic reticulum (ER) proteostasis and non-small cell lung cancer (NSCLC) biology. This heterogeneous pool of NCI-H1299 cells with targeted DNAJC16 gene disruption enables robust population-level analyses without single-cell cloning, preserving biological variability while providing a loss-of-function system. The polyclonal format is particularly suited for pooled functional genomics screens, stress-response profiling, and large-scale cell culture experiments requiring consistent knockout efficiency across the population.
The parental NCI-H1299 cell line, derived from the lymph node metastasis of a lung adenocarcinoma patient, is a widely used model of invasive metastatic NSCLC. These cells exhibit aggressive growth characteristics and are commonly employed to study metastasis, drug resistance, and oncogenic signaling pathways. The lymph node origin provides a clinically relevant context for investigating molecular mechanisms that drive tumor progression and metastatic dissemination, making this knockout model highly pertinent to translational cancer research.
DNAJC16 encodes a J-domain co-chaperone that stimulates the ATPase activity of HSP70 chaperones, facilitating protein folding and quality control in the ER. DNAJC16 is transcriptionally regulated by the unfolded protein response (UPR) sensors ATF6 and XBP1, and also responds to heat shock factor HSF1. It directly interacts with the major ER chaperone HSPA5 (BiP) and cytosolic HSPA8, forming functional complexes that promote efficient protein folding. DNAJC16 functions upstream of HSP70-mediated protein folding and downstream of UPR activation, thereby coupling ER stress sensing to protective chaperone responses. Disruption of DNAJC16 dysregulates this network, affecting key UPR mediators including IRE1, PERK, and the downstream effector CHOP, with potential consequences for protein aggregate clearance and cell survival under proteotoxic stress.
In the context of NCI-H1299 lung cancer cells, DNAJC16 knockout provides a valuable tool to dissect the dependency of tumor cells on ER proteostasis mechanisms. NSCLC cells frequently encounter ER stress due to high secretory loads, hypoxia, and therapeutic challenges; DNAJC16 loss-of-function may expose vulnerabilities that can be therapeutically exploited. This model enables the study of how co-chaperone dysfunction alters UPR signaling thresholds, sensitizes cells to ER stress-inducing agents, and modulates invasive and metastatic properties. Linking these observations to the known upstream regulators and interacting partners creates a comprehensive platform for probing HSP70-dependent chaperone networks in cancer.
Common research applications include quantitative analysis of UPR markers by western blotting (e.g., BiP, CHOP), monitoring XBP1 splicing by RT-qPCR, and assessing apoptosis or viability upon ER stress induction using Annexin V and MTS assays. The polyclonal population is ideal for large-scale functional genomics, drug-response profiling, and proteostasis target validation in lung cancer. For additional product information, technical support, or bulk orders, please contact Ascent Research.
