The ARMC1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HAP1 human near-haploid chronic myeloid leukemia cell line. These cells carry a CRISPR/Cas9-mediated disruption of the ARMC1 gene, creating a loss-of-function model for studying the role of ARMC1 in mitochondrial biology. This polyclonal pool provides a genetically diverse knockout background suitable for functional analyses without clonal selection biases.
HAP1 cells originate from the KBM-7 chronic myeloid leukemia cell line and possess a near-haploid karyotype, making them a powerful tool for genetic studies. They display an adherent, fibroblast-like morphology and retain hematopoietic lineage features of myeloid origin. The haploid nature simplifies interpretation of knockout phenotypes by reducing genetic redundancy, enabling straightforward genotype-phenotype correlation in the context of gene disruption.
ARMC1 is a mitochondrial intermembrane space protein that functions as a molecular chaperone for the import and assembly of nuclear-encoded subunits of the respiratory chain complexes. It directly interacts with the TIM23 translocase complex, including TIMM23, TIMM17A, and TIMM17B, to facilitate the import of precursor proteins. ARMC1 is regulated by mitochondrial biogenesis factors such as PGC-1??, NRF1, and TFAM, linking its expression to cellular energy demands. Downstream, ARMC1 promotes the assembly of oxidative phosphorylation complexes I, III, IV, and V, with representative subunits including NDUFS1 (complex I), UQCRC2 (complex III), COX2 (complex IV), and ATP5A1 (complex V). Disruption of ARMC1 impairs the assembly and stability of these complexes, leading to compromised mitochondrial respiration.
In the HAP1 cellular background, ARMC1 knockout provides a relevant system to dissect mitochondrial protein import and respiratory chain assembly. The near-haploid genome allows clean knockout interpretation, and the CML origin offers insights into cancer metabolic reprogramming. Loss of ARMC1 in these cells can be used to mimic mitochondrial complex I deficiency and Leigh syndrome?Cassociated phenotypes, enabling investigation of disease mechanisms and potential therapeutic interventions. The model is also valuable for studying how mitochondrial dysfunction intersects with leukemia cell survival and proliferation.
Research applications include characterization of mitochondrial import processes, analysis of respiratory chain complex assembly by blue native PAGE, assessment of individual OXPHOS complex activities (e.g., complex I activity assay), and evaluation of cellular bioenergetics via Seahorse respirometry. This knockout cell pool supports drug screening for mitochondrial disorders and validation of candidate genes in mitochondrial biogenesis. Standard assays such as Western blotting for OXPHOS subunits and immunofluorescence can be employed to monitor ARMC1-dependent changes. For further information, please contact Ascent Research.
