ATPAF1 Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the SK-HEP-1 human hepatic adenocarcinoma cell line, engineered to disrupt ATPAF1 gene function. This loss-of-function model provides a valuable tool for studying mitochondrial ATP synthase assembly and oxidative phosphorylation without the need for single-cell cloning, enabling researchers to explore heterogeneous knockout effects within a relevant hepatic cell context. The polyclonal format captures a range of genetic alterations, offering a representative overview of ATPAF1-dependent phenotypes.
SK-HEP-1 cells were originally established from the ascites of a patient with liver adenocarcinoma and exhibit a unique dual epithelial and endothelial phenotype, making them a widely employed model in liver cancer biology and endothelial cell research. Their immortalized nature and robust growth characteristics facilitate large-scale functional assays, and their hepatic origin provides a physiologically relevant backdrop for investigating mitochondrial disorders that manifest in liver tissue, such as lactic acidosis and mitochondrial complex V deficiency.
ATPAF1 encodes an essential assembly factor required for the proper formation of mitochondrial ATP synthase (Complex V), the key enzyme complex responsible for ATP production via oxidative phosphorylation. ATPAF1 is regulated upstream by PPARGC1A, NRF1, and AMPK signaling, and it physically interacts with assembly partners including ATPAF2 and TMEM70 to orchestrate the incorporation of subunits such as ATP5A1, ATP5B, and ATP5C1 into functional Complex V. Disruption of ATPAF1 therefore impairs the assembly process, leading to a reduction in holocomplex levels, diminished ATP synthesis, and compromised mitochondrial membrane potential.
In the SK-HEP-1 background, ATPAF1 knockout models mitochondrial dysfunction relevant to hepatic energy metabolism and cancer cell adaptation. Since liver adenocarcinoma cells rely heavily on oxidative phosphorylation alongside glycolysis, the loss of ATPAF1 sensitizes these cells to metabolic stress and may reveal vulnerabilities exploitable in metabolic-targeted therapies. This polyclonal population is particularly useful for assessing heterogeneity in mitochondrial responses and for dissecting ATPAF1’s role in both epithelial and endothelial features characteristic of the SK-HEP-1 line.
Typical applications include quantitative assessment of ATP synthase assembly via blue native PAGE, measurement of oxygen consumption rate using respirometry, and ATP production assays under various nutrient conditions. Researchers can also evaluate mitochondrial membrane potential with JC-1 staining, perform immunoblotting for Complex V subunits, and test cell viability under galactose-mediated metabolic stress. These applications support studies into mitochondrial disorders, metabolic reprogramming in cancer, and screening for modulators of oxidative phosphorylation. For additional product details or customized support, please contact Ascent Research.
