The IMMT Knockout HeLa Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal knockout cell population in which the IMMT gene has been disrupted, generating a mixed population of HeLa cells with heterogeneous loss-of-function alleles. This polyclonal format avoids clonal selection, preserving genetic diversity and enabling robust population-level studies of mitochondrial biology without the confounding effects of single-cell adaptation. The product is supplied as a ready-to-use mammalian cell culture for immediate expansion and downstream assays, including Western blotting, immunofluorescence, metabolic flux analysis, and apoptosis profiling. All lots are validated for target protein reduction by immunoblotting and maintained under standard adherent culture conditions.
The host HeLa cell line is an immortalized human epithelial cell line derived from a cervical adenocarcinoma, widely employed as a model for cancer biology, signal transduction, and mitochondrial research. HeLa cells exhibit rapid proliferation, robust metabolic activity, and sensitivity to apoptotic stimuli, making them a suitable background for investigating mitochondrial structure?Cfunction relationships. Their endogenous expression of MICOS complex components and dependence on oxidative phosphorylation under specific culture conditions provide a relevant context for dissecting IMMT-dependent phenotypes. Additionally, HeLa cells retain wild-type TP53, enabling intact apoptotic signaling downstream of mitochondrial permeabilization, which is critical for studying IMMT??s role in cytochrome c release and caspase activation.
IMMT (MIC60) is a core subunit of the mitochondrial contact site and cristae organizing system (MICOS), essential for crista junction formation and maintenance, mitochondrial inner membrane architecture, and respiratory chain supercomplex assembly. IMMT functions within the MICOS complex, interacting directly with CHCHD3 (MIC19), MINOS1 (MIC10), CHCHD6 (MIC25), and APOO (MIC27), as well as with SAMM50, OPA1, PHB, and ATAD3A. This complex stabilizes crista junctions and facilitates the binding of OPA1, a dynamin-like GTPase that regulates cristae remodeling and cytochrome c sequestration. IMMT is transcriptionally regulated by NRF1, NRF2 (GABPA), TFAM, and PPARGC1A (PGC-1??), integrating signals from mitochondrial biogenesis pathways. Disruption of IMMT leads to loss of crista junctions, dissociation of MICOS components, impaired oxidative phosphorylation, increased reactive oxygen species (ROS), and sensitization to mitochondrial apoptosis via aberrant CYCS (cytochrome c) and DIABLO release, promoting CASP9 and CASP3 activation. IMMT thus acts as a critical node linking mitochondrial ultrastructure, metabolism, and cell death execution.
In HeLa cells, IMMT knockout disrupts the MICOS complex and cristae integrity, resulting in a pronounced metabolic shift characterized by reduced mitochondrial respiration, elevated glycolysis, and heightened ROS production. The loss of crista junctions sensitizes HeLa cells to intrinsic apoptotic triggers such as staurosporine and BH3 mimetics, as cytochrome c mobilization is amplified. This creates a powerful model for dissecting the interplay between mitochondrial architecture and apoptosis resistance in cancer cells. Furthermore, because HeLa cells harbor high glycolytic capacity, they can tolerate mitochondrial dysfunction, allowing sustained culture of IMMT-deficient populations and facilitating long-term phenotypic analyses. This system enables detailed study of how MICOS disruption influences mitochondrial dynamics, fusion/fission balance regulated by OPA1 and DNM1L, and ATAD3A-mediated cholesterol transport at contact sites, all within a well-characterized cancerous background.
Researchers can utilize the IMMT Knockout HeLa Polyclonal Cells in a broad array of experimental paradigms. Mitochondrial morphology can be assessed by immunofluorescence and electron microscopy, while respiratory chain supercomplex integrity is analyzed via blue native PAGE. Metabolic reprogramming is quantified by Seahorse extracellular flux assays and targeted metabolomics. Apoptosis susceptibility is measured using TMRE/MitoTracker membrane potential dyes, annexin V/PI flow cytometry, and caspase activity assays. ROS levels are monitored with fluorescent probes such as H2DCFDA. The polyclonal population is ideal for drug screening efforts targeting mitochondrial dysfunction and for studying the recruitment and assembly of MICOS components through co-immunoprecipitation and proximity ligation assays. Additionally, this model supports investigation of how upstream regulators like HIF1A and ESRRA modulate MICOS expression under hypoxia or metabolic stress, providing a versatile platform for mitochondrial disease modeling and cancer metabolism research. For further technical details and lot-specific data, please contact Ascent Research.
