The BIN3 Knockout HEK293T Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population engineered to disrupt the BIN3 gene in the human HEK293T cell line. This pool of edited cells provides a powerful loss-of-function model for investigating the roles of BIN3 in endocytic processes, actin cytoskeleton dynamics, and cytokinesis. As a polyclonal population, it reflects the heterogeneous nature of gene disruption across the cell pool, making it suitable for population-level assays without clonal selection bias. The use of CRISPR/Cas9-mediated gene disruption ensures stable, heritable ablation of BIN3 expression, enabling robust functional studies.
The host cell line, HEK293T, is a widely used human embryonic kidney epithelial cell line derived from HEK293 cells by stable transfection with the SV40 large T antigen. These cells grow as an adherent monolayer and are prized for their exceptional transfectability and capacity for high-level protein expression, making them a standard platform for viral vector production and recombinant protein studies. Their epithelial origin and kidney-derived characteristics provide a relevant background for studying endocytosis and membrane trafficking pathways that are often dysregulated in renal cancers and other epithelial malignancies.
BIN3 encodes a BAR domain-containing adapter protein that senses membrane curvature and orchestrates localized actin polymerization. Acting downstream of Rho GTPases CDC42 and RAC1, and regulated by phosphoinositides such as PIP2, BIN3 is activated by EGF signaling. It recruits N-WASP to the membrane, which activates the Arp2/3 complex to nucleate branched actin filaments, driving membrane invagination during clathrin-mediated endocytosis. This mechanism also contributes to the contractile ring during cytokinesis. BIN3 interacts with dynamin and amphiphysin, further connecting it to endocytic vesicle scission.
In HEK293T cells, efficient endocytosis and actin remodeling support vital functions such as viral transduction and protein secretion. Disruption of BIN3 in this polyclonal population can compromise clathrin-mediated uptake of ligands like transferrin, alter actin dynamics at the plasma membrane, and impair cytokinetic furrow formation. Given BIN3’s proposed tumor-suppressive or oncogenic roles linked to cytoskeletal organization, this model provides a physiologically relevant epithelial system for dissecting the molecular underpinnings of cancer-related cytoskeletal abnormalities.
Typical applications include transferrin uptake assays to quantify endocytosis, immunofluorescence microscopy to monitor actin reorganization and Rho GTPase activation, and western blotting or RT-qPCR for knockout validation. Co-immunoprecipitation can probe BIN3 complexes with N-WASP or dynamin, and flow cytometry-based endocytosis assays provide quantitative kinetic data. These tools establish the BIN3 Knockout HEK293T Polyclonal Cells as a critical resource for membrane trafficking and cytokinesis research. For additional information or custom requests, please contact Ascent Research.
