The KLHL15 knockout A-549 polyclonal cells are a CRISPR/Cas9-edited heterogeneous cell population featuring targeted disruption of the KLHL15 gene in the A-549 human lung adenocarcinoma epithelial cell line. This loss-of-function model preserves the inherent genetic diversity of cancer cell populations, avoiding the limitations of single-cell-derived clones. The polyclonal format allows robust functional studies of KLHL15 in a disease-relevant background.
A-549 cells are a widely utilized model for lung adenocarcinoma research, originally derived from a 58-year-old Caucasian male. This adherent epithelial line is characterized by mutations in KRAS and STK11 and is employed to investigate oncogenic signaling, drug sensitivity, and viral pathogenesis. The established karyotype and reproducible growth characteristics of A-549 cells provide a reliable platform for genetic manipulation and downstream phenotypic analyses.
KLHL15 encodes a substrate-specific adaptor for a Cullin-3 (CUL3)/RBX1 E3 ubiquitin ligase complex, directing the ubiquitin-proteasome degradation of target proteins such as Sprouty 2 (SPRY2). By controlling SPRY2 turnover, KLHL15 modulates fibroblast growth factor (FGF) receptor signaling through the ERK1/2 pathway, thereby influencing cell proliferation and migration. Additional interactions with E2 ubiquitin-conjugating enzymes and ubiquitin molecules define its role in protein homeostasis, with broader implications for cell cycle regulation and oncogenesis.
In the A-549 lung adenocarcinoma context, loss of KLHL15 function is expected to alter SPRY2 stability and FGF signaling dynamics, potentially affecting tumor cell proliferation, migration, and drug resistance. This knockout model therefore offers a valuable tool for examining the interplay between the ubiquitin-proteasome system and lung cancer biology, particularly in genetically defined backgrounds with known oncogenic drivers.
Researchers can employ this polyclonal knockout product for detailed investigation of KLHL15-mediated ubiquitination pathways, including substrate identification by co-immunoprecipitation and ubiquitination assays. Functional studies may encompass cell proliferation, migration, and apoptosis assays, as well as cell cycle analysis by flow cytometry. The cells are also suitable for signaling studies such as phospho-ERK measurement and substrate stability assays (cycloheximide chase). Gene expression validation by RT-qPCR and Western blotting further supports mechanistic conclusions. For more information or to place an order, please contact Ascent Research.
