The ATG101 Knockout A-549 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout population with targeted disruption of the ATG101 gene in the A-549 human lung adenocarcinoma cell line. This loss-of-function model is designed for studying autophagy initiation and its roles in cancer cell biology. The polyclonal format provides a heterogeneous pool of edited cells that collectively eliminate ATG101 protein expression, enabling robust functional analyses without single-cell cloning.
The A-549 cell line, isolated from a 58-year-old Caucasian male with lung carcinoma, is a well-characterized epithelial model of human lung adenocarcinoma. It is widely employed in oncology research and drug screening owing to its reproducible growth, tumorigenic properties, and retained autophagy and stress response pathways. This genetic background offers a relevant context for examining autophagy-dependent tumor cell behavior.
ATG101 is an essential autophagy-related protein that stabilizes the ULK1-ATG13 initiation complex through direct interactions with ATG13, ULK1, and FIP200 (RB1CC1). The ULK1 complex is negatively regulated by mTOR and positively regulated by AMPK under nutrient stress, while TFEB transcriptionally controls autophagic gene expression. Downstream, ATG101 facilitates ATG13 and FIP200 phosphorylation, leading to activation of the PI3K complex and ATG12-ATG5-ATG16L1 conjugation, which promotes LC3/GABARAP lipidation and autophagosome formation. Disruption of ATG101 thus blocks autophagy flux, impairing degradation of damaged organelles and protein aggregates.
In A-549 lung carcinoma cells, autophagy plays dual roles in tumorigenesis and drug resistance. ATG101 knockout allows dissection of autophagy??s contribution to tumor cell proliferation, metabolic adaptation, and chemosensitivity. Because A-549 cells are commonly used in drug screening, this model helps identify autophagy-dependent vulnerabilities. It also enables analysis of how disrupted ULK1 complex activity influences cancer cell fate under starvation or hypoxia, conditions relevant to the tumor microenvironment.
Typical applications include autophagy mechanism studies, lung cancer progression research, drug sensitivity assays, and starvation response analysis. Researchers can monitor autophagic activity via Western blotting for LC3-II and p62, immunofluorescence for LC3 puncta, and autophagy flux assays using bafilomycin A1. Cell viability assays under nutrient depletion further probe the role of ATG101 in metabolic stress survival. This polyclonal population is suitable for experiments where genetic heterogeneity mimics tumor variability. For additional information, please contact Ascent Research.
