CDKN1B Knockout Cell Line (A549)

The choice depends on whether you are studying CDKN1B (p27^Kip1)'s role as a Cip/Kip family cyclin-dependent kinase inhibitor or modeling its functions in lung cancer cell cycle regulation. The Knockout line is the standard tool for asking whether p27 is required for these processes — CDKN1B/p27 is a CDK inhibitor that binds and inhibits Cyclin E-CDK2 and Cyclin A-CDK2 complexes (G1/S transition), with paradoxical assembly/activating roles for Cyclin D-CDK4/6; p27 is regulated by phosphorylation (S10, T187 destruction signal, T157/T198 cytoplasmic relocalization) and by SCF^SKP2-mediated degradation. Overexpression is useful for studying p27 gain-of-function effects. For lung cancer research, the EDITGENE CDKN1B Knockout in A-549 is highly relevant — A-549 is an NSCLC cell line, and p27 loss is a common cancer event (often via post-translational mechanisms rather than gene deletion). Rescue with wild-type or T187A (SKP2-resistant, stable) p27 enables structure-function and cancer modeling studies. The knockout is valuable for studying CDK inhibition biology, Cyclin E-CDK2-mediated G1/S progression, and emerging p27-stabilizing approaches in cancer.

Primary applications: • Cyclin E-CDK2 inhibition: in vitro and cellular CDK2 kinase activity assays in p27-null cells. • Cell cycle analysis: G1/S transition kinetics by flow cytometry following serum stimulation given p27's G1 inhibitor function. • Lung cancer biology: NSCLC proliferation and chemotherapy sensitivity in A-549 context. • SCF^SKP2-mediated degradation: T187 phospho-p27 and SKP2-mediated ubiquitination analysis. EDITGENE recommends this model for researchers investigating CDK inhibition biology and lung cancer cell cycle regulation.

Yes. p27 rescue experiments are well-established for cell cycle research: • Construct design: use a codon-modified CDKN1B sequence with a small C-terminal tag (FLAG, HA). p27 has N-terminal CDK inhibitor (CKI) domain, central QT region with T187 destruction signal, and C-terminal regions — preserve all elements. • T187A stable rescue: T187A mutation prevents SCF^SKP2-mediated degradation, generating stable p27 with prolonged G1 arrest activity. • T157A/T198A cytoplasmic-deficient rescue: T157A and T198A mutations prevent AKT-mediated cytoplasmic relocalization. • CDK-binding-deficient rescue: CKI domain mutations disrupt Cyclin-CDK binding without affecting other p27 functions. • Functional readout: rescue should restore G1 arrest and Cyclin E-CDK2 inhibition. A-549 transduces efficiently with lentivirus and supports stable rescue line generation.