The ASAP1 Knockout A-549 Polyclonal Cells constitute a CRISPR/Cas9-engineered polyclonal population derived from the human lung adenocarcinoma A-549 cell line, providing a loss-of-function model for studying the Arf GTPase-activating protein ASAP1. This gene-edited pool contains heterogeneous mutations across the target gene, enabling robust population-level analyses of migratory, invasive, and signaling phenotypes without clonal selection biases. Each vial contains cryopreserved polyclonal cells ready for thawing and immediate experimental use in standard culture conditions.
The A-549 cell line originates from a human lung adenocarcinoma specimen and serves as a cornerstone model for non-small cell lung cancer research. These epithelial carcinoma cells retain active EGFR and integrin signaling pathways, display strong substrate adhesion, and undergo epithelial-to-mesenchymal transition upon stimulation, making them highly suitable for investigating determinants of metastasis. The integration of ASAP1 knockout into this background allows direct interrogation of gene function in a clinically relevant context.
ASAP1 functions as a GTPase-activating protein for Arf1 and Arf6, key regulators of membrane trafficking and actin cytoskeleton dynamics. Signaling from receptor tyrosine kinases such as EGFR and PDGFR, transduced via SRC kinase and PI3K, activates ASAP1 and promotes its association with adhesion complex components FAK and paxillin, as well as cortactin. This multi-protein nexus controls rapid actin remodeling at the cell leading edge and governs focal adhesion turnover. Disruption of ASAP1 in the knockout pool therefore impairs Arf-dependent Rac1 and Rho GTPase cascades, leading to reduced cell migration, defective matrix degradation, and diminished invasive capacity.
In the A-549 lung adenocarcinoma model, loss of ASAP1 provides precise control over cell motility programs essential for metastatic progression. The polyclonal nature avoids artifacts associated with single-cell cloning and offers a comprehensive view of the gene??s role in focal adhesion dynamics and three-dimensional invasion. Studies using these knockout cells can reveal how ASAP1 coordinates growth factor signals with mechanical outputs, and how its deficiency correlates with attenuated tumor cell dissemination, thus informing therapeutic targets aimed at blocking metastasis.
Typical experimental applications include scratch wound and transwell migration assays, Matrigel-based invasion assays, and high-resolution immunofluorescence microscopy to visualize paxillin, FAK, and actin polymers. Arf activity pull-downs, phospho-signaling immunoblots (e.g., phospho-AKT, phospho-SRC), and western blotting for ASAP1 and downstream effectors are readily performed. These cells are also amenable to rescue protocols with wild-type or mutant ASAP1 constructs to map functional domains and interaction networks. For additional information or to place orders, please contact Ascent Research.
