The BAG5 Knockout KYSE-30 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population in which BAG5 gene disruption has been introduced into the KYSE-30 human esophageal squamous cell carcinoma line. This heterogeneous pool models BAG5 loss-of-function without clonal selection, making it suitable for population-level phenotypic analyses, drug-response profiling, and omics studies.
KYSE-30 is a well-characterized cell line derived from a human esophageal squamous cell carcinoma, displaying epithelial morphology and robust tumorigenic capacity. It serves as a faithful model for studying esophageal carcinogenesis, metastasis, and therapeutic resistance, and is widely used to explore the molecular underpinnings of ESCC progression and therapy response.
BAG5 encodes a nucleotide exchange factor for Hsp70, facilitating substrate release and thereby regulating protein quality control. It directly interacts with Hsp70, Hsc70, Parkin, PINK1, and BCL-2, and functions at the intersection of chaperone-mediated protein folding, autophagy, and apoptosis. BAG5 expression is induced by heat shock and proteotoxic stress, and its activity modulates downstream LC3 lipidation, caspase activation, and Parkin translocation to mitochondria, processes critical for cellular stress adaptation.
In KYSE-30 cells, BAG5 knockout compromises Hsp70 chaperone cycle function, impairing autophagic clearance of protein aggregates and sensitizing cells to proteotoxic stress and apoptosis. This disruption is particularly relevant to esophageal cancer biology, where protein homeostasis pathways are frequently dysregulated to support malignant growth and drug resistance. The model thus enables dissection of BAG5-dependent quality control mechanisms in ESCC survival and therapy adaptation.
Applications include investigating protein homeostasis through western blotting and co-immunoprecipitation of BAG5 partners such as Hsp70 and Parkin, assessing autophagy flux via LC3 lipidation, and measuring apoptosis using flow cytometry. Migration, invasion, and drug sensitivity assays can evaluate the impact of BAG5 loss on metastatic potential and chemoresistance. These polyclonal cells are also suited for transcriptomic and proteomic analyses to map stress response networks. For additional information or to request custom models, contact Ascent Research.
