The ARMCX3 Knockout HEK293T Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population engineered for targeted disruption of the ARMCX3 gene. This polyclonal format provides a heterogeneous pool of cells with diverse editing events, enabling robust loss-of-function studies without clonal selection artifacts. The knockout model is generated in the HEK293T host background and serves as a versatile tool for investigating ARMCX3 functions in mitochondrial biology, signaling pathways, and disease-relevant contexts.
The HEK293T cell line is a widely utilized human embryonic kidney epithelial line that constitutively expresses the SV40 large T antigen, facilitating episomal replication of plasmids and high-level protein expression. With an adherent fibroblastoid morphology, HEK293T cells are a staple in biomedical research for viral production, transient transfection, and as a host for CRISPR-based gene editing. This genetic background supports efficient introduction of guide RNAs and Cas9, resulting in a polyclonal knockout population that retains the core advantages of the parent line while enabling investigation of ARMCX3 loss.
ARMCX3 encodes a mitochondrial armadillo repeat protein that critically regulates mitochondrial dynamics and axonal transport. Mechanistically, ARMCX3 operates as part of a multiprotein complex with ARMCX1 and ARMCX2, and directly interacts with the Miro1 (RHOT1) and TRAK1 adaptor complex to govern mitochondrial movement along microtubules. Loss of ARMCX3 disrupts the balance of mitochondrial fission and fusion, often leading to mitochondrial fragmentation mediated through altered activity of the fission GTPase DRP1 (DNM1L). ARMCX3 function is integrated with upstream signals including Wnt pathway activation and mitochondrial stress cues such as reactive oxygen species (ROS) and the unfolded protein response. Downstream, ARMCX3 affects Miro1/TRAK1-mediated transport, DRP1 recruitment, and overall mitochondrial membrane potential and ATP production. Known interactors include the mitofusins MFN1 and MFN2, which with OPA1 and DRP1 constitute the core machinery of mitochondrial dynamics, and loss of ARMCX3 perturbs this network, offering a targeted entry point to dissect mitochondrial quality control.
In the HEK293T context, ARMCX3 knockout allows dissection of mitochondrial signaling pathways independent of neuronal-specific factors, yet this model retains relevance to neurodevelopmental disorders such as X-linked intellectual disability and autism spectrum disorder, where ARMCX3 dysfunction is implicated. The polyclonal population mitigates clonal variability and provides a more physiologically averaged response to gene disruption, making it suitable for both biochemical and cell-based assays that require robust population-level phenotypes. The embryonic kidney origin of HEK293T also facilitates studies on mitochondrial dynamics in epithelial cells, complementing neuronal models.
This knockout product is ideally suited for a broad range of research applications. Investigators can assess mitochondrial morphology and network organization via MitoTracker staining and immunofluorescence, quantify metabolic function using Seahorse extracellular flux analysis and ATP measurement assays, and probe protein interactions through co-immunoprecipitation of the ARMCX3 complex with Miro1, TRAK1, and DRP1. Additionally, the impact on Wnt signaling can be evaluated by RT-qPCR of target gene expression, and mitochondrial membrane potential can be monitored with TMRM staining. Flow cytometry for mitochondrial mass enables high-throughput phenotypic screening. These cells also serve as a foundational tool for drug screening in mitochondrial disorders and for validating gene-editing strategies targeting ARMCX3-related pathways. For more information, please contact Ascent Research.
