The ATP5MK Knockout HeLa Polyclonal Cells product comprises a CRISPR/Cas9-edited polyclonal knockout cell population featuring targeted disruption of the ATP5MK gene in the human HeLa host cell line. This loss-of-function model is generated through CRISPR/Cas9-mediated gene disruption, yielding a heterogeneous pool of edited cells suitable for studying gene function without single-cell cloning artifacts. The polyclonal format maintains genetic diversity while eliminating wild-type ATP5MK expression, enabling robust downstream analyses in a physiologically relevant cellular context.
The host cell line, HeLa, is an immortalized epithelial cell line derived from human cervical adenocarcinoma. It harbors integrated human papillomavirus type 18 (HPV18) sequences, leading to constitutive expression of the viral oncoproteins E6 and E7, which inactivate the tumor suppressors p53 and Rb, respectively. This genetic background drives uncontrolled proliferation and altered stress responses, making HeLa cells a cornerstone model in cancer biology, virology, and molecular pharmacology. Their robust growth characteristics and extensive characterization further support reproducible experimental outcomes.
ATP5MK encodes a transmembrane subunit of the mitochondrial F1Fo ATP synthase (Complex V), where it contributes to proton translocation, ATP synthesis, and the structural integrity of the enzyme. It also participates in cristae morphology maintenance. Mechanistically, ATP5MK functions within the oxidative phosphorylation pathway and is transcriptionally regulated by PPARGC1A (PGC-1??), NRF1, and TFAM, downstream of mTOR signaling. Its protein product directly interacts with core ATP synthase components, including ATP5F1A, ATP5F1B, and ATP5PO, as well as assembly factors such as ATPAF1 and MICOS complex members. Disruption of ATP5MK impairs Complex V assembly, reduces mitochondrial membrane potential, and alters cellular ATP levels, thereby activating AMPK and shifting metabolic reliance toward glycolysis.
In the HeLa cervical cancer context, ATP5MK knockout holds particular significance due to the cell line??s inherent metabolic flexibility and HPV-driven tumorigenic program. HeLa cells exhibit heightened glycolytic flux even under aerobic conditions, a phenotype that may be exacerbated by ATP synthase deficiency. The knockout model thus enables dissection of how mitochondrial ATP production intersects with oncogenic signaling, redox balance, and proliferation. It provides a defined system to investigate the interplay between mitochondrial complex V dysfunction and pathways governed by mTORC1, AMPK, and PGC-1??, offering insights into metabolic reprogramming in malignancies.
This knockout cell population is suited for a range of advanced research applications, including characterization of mitochondrial respiratory chain function, examination of ATP synthase assembly via Blue Native PAGE, and metabolic profiling using Seahorse respirometry to measure oxygen consumption and extracellular acidification rates. It further supports investigations of mitochondrial membrane potential with TMRE or JC-1 dyes, quantitation of intracellular ATP levels, and assessment of galactose sensitivity to probe metabolic vulnerability. Additional applications encompass RT-qPCR analysis of mitochondrial gene expression, flow cytometry for oxidative stress markers, and screening of small molecules that modulate respiratory chain activity. For further details, please contact Ascent Research.
