The CACNA1G Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from HEK293T human embryonic kidney epithelial cells, designed to disrupt the CACNA1G gene. This gene encodes the ??1G subunit of T-type voltage-gated calcium channels (Cav3.1), which form low-voltage-activated calcium-permeable pores. The polyclonal nature provides a heterogeneous loss-of-function model, avoiding clonal selection biases, and is well-suited for pooled screening studies. The CRISPR/Cas9-mediated gene disruption generates a versatile knockout reagent for investigating Cav3.1-dependent signaling and disease mechanisms.
HEK293T cells are a widely used derivative of the HEK293 line, stably expressing the SV40 large T antigen to enable episomal replication of SV40 origin-containing plasmids. These adherent epithelial cells offer high transfectability and robust capacity for recombinant protein expression and viral production. The human embryonic kidney origin provides a relevant epithelial background for studying exogenous CACNA1G variants or interacting partners in a defined null context, minimizing interference from endogenous channel activity.
CACNA1G encodes the pore-forming ??1G subunit of T-type voltage-gated calcium channels (Cav3.1), which open in response to small membrane depolarizations, allowing transient low-voltage-activated calcium influx. Channel gating is modulated by upstream factors including dopamine D1 and D2 receptors, protein kinase C, and Ca2?/calmodulin-dependent protein kinase II (CaMKII). The subsequent calcium signal activates downstream mediators such as calmodulin, CaMKII, calcineurin, cAMP-response element binding protein (CREB), and nuclear factor of activated T cells (NFAT) transcription factors. Key interacting partners??auxiliary subunits CACNB1, CACNB2, CACNA2D1, and syntaxin-1A??associate with the pore-forming subunit to regulate channel trafficking and kinetics. Through these interactions, CACNA1G couples membrane excitability to calcium-dependent gene transcription and neuronal signaling pathways.
In the HEK293T background, the CACNA1G knockout offers a null environment for heterologous expression of wild-type or mutant Cav3.1 channels, enabling structure-function analyses and characterization of disease-associated variants. This model is relevant to neurological disorders linked to CACNA1G, including spinocerebellar ataxia type 42, childhood absence epilepsy, generalized epilepsy with febrile seizures plus, and autism spectrum disorder. The polyclonal population also facilitates pooled pharmacological screens to identify T-type calcium channel modulators.
These knockout cells are applicable to a variety of assays, including Western blotting, RT-qPCR, and immunofluorescence for confirming gene disruption and examining downstream signaling components. Functional analyses via calcium imaging and patch-clamp electrophysiology enable pharmacological profiling of Cav3.1 modulators. Protein interaction studies, such as co-immunoprecipitation of Cav3.1 with auxiliary subunits or associated kinases, are also supported. Complementation assays can rescue channel function, and disease modeling can incorporate patient-derived mutations. For further information, please contact Ascent Research.
