The DTD1 Knockout A-549 Polyclonal Cells product comprises a heterogeneous population of A-549 cells subjected to CRISPR/Cas9-mediated gene disruption targeting the DTD1 locus. This polyclonal format preserves the genetic diversity inherent to the editing process, resulting in a pool of cells carrying diverse loss-of-function alleles for DTD1. The population model enables robust functional studies without the clonal selection biases associated with single-cell-derived lines, making it particularly suitable for assays that require averaged responses across a genetically varied knockout background.
A-549 cells are a widely used human lung adenocarcinoma-derived epithelial cell line, originally isolated from a 58-year-old Caucasian male. These cells exhibit features characteristic of alveolar type II pneumocytes and serve as a well-established model for lung alveolar epithelial biology and non-small cell lung cancer research. Their adherent growth, robust proliferation, and well-characterized signaling networks render them a dependable chassis for studying gene function in the context of pulmonary carcinogenesis and cellular stress responses.
DTD1 encodes a D-aminoacyl-tRNA deacylase that hydrolyzes mischarged D-aminoacyl-tRNAs, such as D-Tyr-tRNA??? produced by tyrosyl-tRNA synthetase (YARS), thereby preventing the incorporation of D-amino acids into nascent polypeptides and preserving translational fidelity. Expression of DTD1 is regulated by key stress-responsive transcription factors ATF4 and NRF2, which mediate its induction under oxidative stress. DTD1 activity directly impacts downstream processes including protein synthesis fidelity, ubiquitin?Cproteasome system function, and the suppression of proteotoxic protein aggregation. Through its interaction with mischarged tRNAs and translation elongation factors, DTD1 acts as a critical checkpoint in the ribosomal quality control pathway.
In the A-549 lung adenocarcinoma model, disruption of DTD1 offers a powerful tool for dissecting the interplay between translational fidelity and tumor cell survival under oxidative stress. Since lung epithelial cells are frequently exposed to environmental oxidants, the DTD1 knockout cells can be used to investigate how D-amino acid accumulation exacerbates proteotoxic stress and to evaluate the consequent activation of adaptive pathways. This model is particularly relevant for exploring the molecular basis of DTD1-linked pathologies, including neurodevelopmental disorders and colorectal and lung adenocarcinomas, where aberrant translation fidelity may contribute to disease progression.
Researchers can employ this knockout cell population for a range of applications such as performing D-aminoacyl-tRNA deacylase activity assays, monitoring translation fidelity via puromycin incorporation, quantifying D-amino acid incorporation by mass spectrometry, assessing cell viability under oxidative stress, and visualizing protein aggregation through immunofluorescence or western blotting. These experiments can help elucidate the mechanisms by which DTD1 maintains proteostasis, delineate the signaling networks connecting oxidative stress to translational control, and validate DTD1 as a potential therapeutic target in cancer. For additional technical details, inquiries, or order placement, please contact Ascent Research.
