SLC3A2 Knockout Cell Line (A549)

The choice depends on whether you are studying SLC3A2 (4F2hc/CD98)'s role as the heavy chain partner for heterodimeric amino acid transporters or its functions in integrin signaling and cancer biology. The Knockout line is the standard tool for asking whether 4F2hc is required for surface expression and function of LAT1, LAT2, xCT, and other heterodimeric SLC7 family transporters — 4F2hc partnership is essential for these transporters' membrane localization and stability. Overexpression is useful for studying CD98's reported role in integrin clustering and signaling, distinct from its transporter chaperone function. For amino acid transporter research, the EDITGENE 4F2hc Knockout in A-549 is highly informative because 4F2hc loss simultaneously disrupts multiple heterodimeric transporters (LAT1, LAT2, xCT, asc-1, y+LAT1, y+LAT2). A-549 expresses LAT1 and xCT, making this lung cancer background relevant for studying amino acid transporter pharmacology in NSCLC. Rescue with wild-type or signaling-deficient 4F2hc separates transporter chaperone from integrin-related functions.

Primary applications: • Multi-transporter dependency: loss of 4F2hc simultaneously disrupts LAT1, LAT2, xCT, and other SLC7 family transporters — critical genetic tool for combined analysis. • LAT1 amino acid uptake: ³H-leucine uptake assays to confirm functional consequences of 4F2hc loss on LAT1-mediated transport. • xCT cystine/glutamate exchange: cystine uptake and ferroptosis sensitivity assays given 4F2hc partnership with xCT. • Integrin signaling studies: CD98 cytoplasmic tail interactions with β1 integrin and downstream signaling effects, separable from transporter chaperone functions. EDITGENE recommends this model for researchers investigating heterodimeric amino acid transporter biology, ferroptosis, and CD98-integrin signaling in lung cancer contexts.

Yes. 4F2hc rescue experiments require attention to its dual chaperone/signaling functions: • Construct design: use a codon-modified SLC3A2 sequence with a small C-terminal cytoplasmic tag (FLAG, HA). 4F2hc is a type II membrane protein — preserve the disulfide-linked extracellular domain that mediates SLC7 partner interactions. • Cytoplasmic tail-deleted rescue: cytoplasmic tail deletion separates SLC7 transporter chaperone function from integrin signaling roles — critical for distinguishing these dual functions. • Disulfide bond mutant rescue: cysteine mutations affecting heterodimer formation with SLC7 partners enable assessment of transporter-related functions specifically. • Functional readout: rescue should restore surface expression of LAT1, LAT2, xCT, and other SLC7 partners (assessed by cell surface biotinylation) and downstream amino acid uptake activities. A-549 transduces efficiently with lentivirus and supports stable rescue line generation.