The ATAD3A Knockout HAP1 Polyclonal Cells constitute a CRISPR/Cas9-engineered polyclonal knockout population in the HAP1 background, featuring targeted gene disruption of ATAD3A. This loss-of-function model enables systematic investigation of ATAD3A’s pleiotropic roles at the intersection of mitochondrial physiology, innate immunity, and cholesterol metabolism.
The HAP1 host cell line is a near-haploid suspension culture derived from a male patient with chronic myeloid leukemia. Its haploid karyotype ensures that mutagenesis of a single allele typically results in complete gene inactivation, providing unambiguous genotype?Cphenotype relationships. The suspension growth mode facilitates large-scale culture and compatibility with high-content screening platforms, making HAP1 a workhorse for functional genomics and drug discovery.
ATAD3A encodes an essential mitochondrial inner membrane AAA-ATPase that physically and functionally links mitochondrial dynamics to cellular signaling. Through direct interaction with MAVS, it modulates RIG-I-mediated antiviral responses, driving IRF3 and NF-??B activation and subsequent type I interferon production. In parallel, ATAD3A cooperates with TSPO and VDAC to regulate cholesterol import, affecting StAR-mediated steroidogenesis and SREBP2-driven lipid homeostasis. The protein further contributes to mitochondrial DNA replication by associating with nucleoid proteins and influences apoptosis under mitochondrial stress. Upstream regulation by STAT3, viral RNA, and cholesterol levels positions ATAD3A as a key integrator of metabolic and immune cues.
In the HAP1 near-haploid system, ATAD3A knockout yields a clean genetic background that amplifies phenotypic readouts, making it ideal for dissecting gene function. This model is particularly relevant for modeling Harel-Yoon syndrome, a disorder linked to ATAD3A mutations that cause cerebellar atrophy, pontocerebellar hypoplasia, and peripheral neuropathy. Additionally, the leukemic origin of HAP1 cells provides a pertinent context for studying ATAD3A’s roles in cancer metabolism, mitochondrial dynamics, and apoptotic regulation, where disruption may sensitize cells to mitochondrial stress.
Typical experimental applications include immunofluorescence imaging to assess mitochondrial network morphology, qRT-PCR and luciferase reporter assays to quantify IRF3/NF-??B activity and interferon-stimulated gene expression, Seahorse flux analysis for metabolic profiling, and cholesterol uptake measurements. Co-immunoprecipitation can map ATAD3A interactions with MAVS, TSPO, VDAC, MFN2, or nucleoid proteins. The polyclonal population supports drug screening efforts targeting mitochondrial functions or antiviral innate immunity pathways. For further inquiries, please contact Ascent Research.
