The BAG5 Knockout 143B Polyclonal Cells are a CRISPR/Cas9-engineered polyclonal knockout cell population derived from the 143B human osteosarcoma cell line. This product provides a stable loss-of-function model through targeted disruption of the BAG5 gene, abolishing BAG5 protein expression. The polyclonal nature ensures a diverse edited population, capturing heterogeneous knockout outcomes and minimizing clone-specific biases, making it suitable for robust functional genomics studies.
The 143B cell line, isolated from a human osteosarcoma, is a widely used model in cancer biology and mitochondrial research. Its cybrid competence allows the generation of transmitochondrial hybrids, facilitating the study of mitochondrial-nuclear crosstalk. 143B cells are characterized by active mitochondrial metabolism and sensitivity to apoptotic stimuli, providing an ideal background for investigating BAG5-dependent mitochondrial quality control and cell death pathways.
BAG5 functions as a co-chaperone and nucleotide exchange factor for Hsp70, promoting substrate release and protein refolding. Additionally, BAG5 directly inhibits the E3 ubiquitin ligase Parkin, a key mediator of mitophagy. Through these interactions, BAG5 integrates protein homeostasis with mitochondrial clearance. BAG5 forms complexes with Hsp70, Hsc70, CHIP (STUB1), and ubiquitin, and is modulated by heat shock, oxidative stress, and the unfolded protein response. Downstream, BAG5 regulates Parkin-mediated ubiquitination and mitochondrial membrane potential, thereby impacting proteasomal degradation and autophagic removal of damaged mitochondria.
In the 143B context, BAG5 knockout disrupts the Hsp70 chaperone cycle and relieves Parkin inhibition, leading to impaired protein folding and enhanced mitophagy. This dual perturbation sensitizes osteosarcoma cells to proteotoxic stress and alters mitochondrial dynamics, offering a model to dissect how chaperone networks and ubiquitin-dependent mitophagy intersect in cancer survival and neurodegeneration. The 143B BAG5 knockout model is thus valuable for exploring mechanisms of apoptosis resistance, mitochondrial dysfunction, and protein aggregation relevant to Parkinson’s disease and other disorders.
This knockout product supports a range of experimental approaches, including western blotting, co-immunoprecipitation, ubiquitination assays, mitochondrial membrane potential measurements, and apoptosis analyses. Immunofluorescence enables visualization of BAG5 interactors and mitochondrial morphology. These tools make the BAG5 Knockout 143B Polyclonal Cells suitable for Parkinson’s disease modeling, chaperone biology research, and mitochondrial quality control studies. For further information, please contact Ascent Research.
