The ATP8A1 Knockout A-549 Polyclonal Cells product provides a CRISPR/Cas9-edited polyclonal knockout cell population derived from the A-549 human lung adenocarcinoma line, designed for loss-of-function studies of the ATP8A1 gene. This pooled population carries heterogeneous gene disruptions introduced at the target locus, enabling robust examination of ATP8A1 function without clonal isolation. The mixed knockout background preserves population-level heterogeneity and is well-suited for assays in which polygenic effects are minimized while maintaining throughput and biological reproducibility.
The host A-549 cell line originates from a lung adenocarcinoma of a 58-year-old Caucasian male and exhibits adherent epithelial morphology with wild-type p53 expression. Widely employed as a model for human alveolar type II epithelium, A-549 cells are instrumental in lung cancer biology, respiratory toxicology, and drug discovery. A-549 cells endogenously express key components of phospholipid transport pathways, providing a physiologically relevant background for dissecting ATP8A1-mediated processes. Their well-characterized signal transduction cascades and reproducible in vitro behavior make them a reliable platform for investigating membrane dynamics and tumor cell migration.
ATP8A1 encodes a P4-ATPase flippase that maintains membrane asymmetry by internalizing phosphatidylserine (PS) and phosphatidylethanolamine. Its activity is strictly dependent on the cofactor CDC50A (TMEM30A) and is regulated by Ca2? and PKC. In the knockout cells, ATP8A1 disruption abolishes flippase activity, leading to constitutive PS externalization, which derepresses externalized PS signaling and modulates Rho GTPase (e.g., Rho, Rac) and integrin pathways. The ATP8A1?CCDC50A complex interacts with actin cytoskeleton components, and loss of ATP8A1 alters actin dynamics, reducing directional cell migration. Additionally, abnormal PS exposure attenuates phagocytic clearance by disrupting normal apoptotic recognition.
In the A-549 lung adenocarcinoma context, loss of ATP8A1 profoundly alters membrane phospholipid topology, shifting the balance between survival and immune recognition. Constitutive PS exposure impairs normal apoptotic clearance mechanisms and may enhance metastatic potential by altering integrin-mediated adhesion dynamics and Rho GTPase-dependent invasion. This model thus enables detailed dissection of how phospholipid scrambling contributes to tumor aggressiveness and therapy resistance. Moreover, the interaction between PS externalization and the tumor microenvironment can be studied in a syngeneic human lung cancer background.
Typical applications include functional validation of ATP8A1 in PS translocation assays, quantitative annexin V binding studies, Boyden chamber migration/invasion assays, wound healing analysis, and flow cytometric detection of surface PS. The polyclonal population is particularly useful for drug screening campaigns targeting flippase activity and for chemical biology approaches to restore membrane asymmetry. It also supports disease modeling for cerebellar ataxia, mental retardation, and disequilibrium syndrome type 4 (CAMRQ4) when combined with neuronal assays. For detailed product information, protocols, and customization options, please contact Ascent Research.
